| Message ID | 1392235552-28134-1-git-send-email-pengw@nvidia.com |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On Wed, Feb 12, 2014 at 12:05 PM, Bryan Wu <cooloney@gmail.com> wrote: > From: Guennadi Liakhovetski <g.liakhovetski@gmx.de> > > With OF we aren't getting platform data any more. To minimise changes we > create all the missing data ourselves, including compulsory struct > soc_camera_link objects. Host-client linking is now done, based on the OF > data. Media bus numbers also have to be assigned dynamically. > > OF probing reuses the V4L2 Async API which is used by async non-OF probing. > > Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Hi Guennadi, Do you have chance to review my v2 patch? Thanks, -Bryan > Signed-off-by: Bryan Wu <pengw@nvidia.com> > --- > v2: > - move to use V4L2 Async API > - cleanup some coding style issue > - allocate struct soc_camera_desc sdesc on stack > - cleanup unbalanced mutex operation > > drivers/media/platform/soc_camera/soc_camera.c | 232 ++++++++++++++++++++++++- > include/media/soc_camera.h | 5 + > 2 files changed, 233 insertions(+), 4 deletions(-) > > diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c > index 4b8c024..ffe1254 100644 > --- a/drivers/media/platform/soc_camera/soc_camera.c > +++ b/drivers/media/platform/soc_camera/soc_camera.c > @@ -23,6 +23,7 @@ > #include <linux/list.h> > #include <linux/module.h> > #include <linux/mutex.h> > +#include <linux/of.h> > #include <linux/platform_device.h> > #include <linux/pm_runtime.h> > #include <linux/regulator/consumer.h> > @@ -36,6 +37,7 @@ > #include <media/v4l2-common.h> > #include <media/v4l2-ioctl.h> > #include <media/v4l2-dev.h> > +#include <media/v4l2-of.h> > #include <media/videobuf-core.h> > #include <media/videobuf2-core.h> > > @@ -49,6 +51,7 @@ > vb2_is_streaming(&(icd)->vb2_vidq)) > > #define MAP_MAX_NUM 32 > +static DECLARE_BITMAP(host_map, MAP_MAX_NUM); > static DECLARE_BITMAP(device_map, MAP_MAX_NUM); > static LIST_HEAD(hosts); > static LIST_HEAD(devices); > @@ -65,6 +68,17 @@ struct soc_camera_async_client { > struct list_head list; /* needed for clean up */ > }; > > +struct soc_camera_of_client { > + struct soc_camera_desc *sdesc; > + struct soc_camera_async_client sasc; > + struct v4l2_of_endpoint node; > + struct dev_archdata archdata; > + struct device_node *link_node; > + union { > + struct i2c_board_info i2c_info; > + }; > +}; > + > static int soc_camera_video_start(struct soc_camera_device *icd); > static int video_dev_create(struct soc_camera_device *icd); > > @@ -1336,6 +1350,10 @@ static int soc_camera_i2c_init(struct soc_camera_device *icd, > return -EPROBE_DEFER; > } > > + /* OF probing skips following I2C init */ > + if (shd->host_wait) > + return 0; > + > ici = to_soc_camera_host(icd->parent); > adap = i2c_get_adapter(shd->i2c_adapter_id); > if (!adap) { > @@ -1573,10 +1591,180 @@ static void scan_async_host(struct soc_camera_host *ici) > asd += ici->asd_sizes[j]; > } > } > + > +static void soc_camera_of_i2c_ifill(struct soc_camera_of_client *sofc, > + struct i2c_client *client) > +{ > + struct i2c_board_info *info = &sofc->i2c_info; > + struct soc_camera_desc *sdesc = sofc->sdesc; > + > + /* on OF I2C devices platform_data == NULL */ > + info->flags = client->flags; > + info->addr = client->addr; > + info->irq = client->irq; > + info->archdata = &sofc->archdata; > + > + /* archdata is always empty on OF I2C devices */ > + strlcpy(info->type, client->name, sizeof(info->type)); > + > + sdesc->host_desc.i2c_adapter_id = client->adapter->nr; > +} > + > +static void soc_camera_of_i2c_info(struct device_node *node, > + struct soc_camera_of_client *sofc) > +{ > + struct i2c_client *client; > + struct soc_camera_desc *sdesc = sofc->sdesc; > + struct i2c_board_info *info = &sofc->i2c_info; > + struct device_node *port, *sensor, *bus; > + > + port = v4l2_of_get_remote_port(node); > + if (!port) > + return; > + > + /* Check the bus */ > + sensor = of_get_parent(port); > + bus = of_get_parent(sensor); > + > + if (of_node_cmp(bus->name, "i2c")) { > + of_node_put(port); > + of_node_put(sensor); > + of_node_put(bus); > + return; > + } > + > + info->of_node = sensor; > + sdesc->host_desc.board_info = info; > + > + client = of_find_i2c_device_by_node(sensor); > + /* > + * of_i2c_register_devices() took a reference to the OF node, it is not > + * dropped, when the I2C device is removed, so, we don't need an > + * additional reference. > + */ > + of_node_put(sensor); > + if (client) { > + soc_camera_of_i2c_ifill(sofc, client); > + sofc->link_node = sensor; > + put_device(&client->dev); > + } > + > + /* client hasn't attached to I2C yet */ > +} > + > +static struct soc_camera_of_client *soc_camera_of_alloc_client(const struct soc_camera_host *ici, > + struct device_node *node) > +{ > + struct soc_camera_of_client *sofc; > + struct v4l2_async_subdev *sensor; > + struct soc_camera_desc sdesc = { .host_desc.host_wait = true,}; > + int i, ret; > + > + sofc = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sofc), GFP_KERNEL); > + if (!sofc) > + return NULL; > + > + /* Allocate v4l2_async_subdev by ourselves */ > + sensor = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sensor), GFP_KERNEL); > + if (!sensor) > + return NULL; > + sofc->sasc.sensor = sensor; > + > + mutex_lock(&list_lock); > + i = find_first_zero_bit(device_map, MAP_MAX_NUM); > + if (i < MAP_MAX_NUM) > + set_bit(i, device_map); > + mutex_unlock(&list_lock); > + if (i >= MAP_MAX_NUM) > + return NULL; > + sofc->sasc.pdev = platform_device_alloc("soc-camera-pdrv", i); > + if (!sofc->sasc.pdev) > + return NULL; > + > + sdesc.host_desc.node = &sofc->node; > + sdesc.host_desc.bus_id = ici->nr; > + > + ret = platform_device_add_data(sofc->sasc.pdev, &sdesc, sizeof(sdesc)); > + if (ret < 0) > + return NULL; > + sofc->sdesc = sofc->sasc.pdev->dev.platform_data; > + > + soc_camera_of_i2c_info(node, sofc); > + > + return sofc; > +} > + > +static void scan_of_host(struct soc_camera_host *ici) > +{ > + struct soc_camera_of_client *sofc; > + struct soc_camera_async_client *sasc; > + struct v4l2_async_subdev *asd; > + struct soc_camera_device *icd; > + struct device_node *node = NULL; > + > + for (;;) { > + int ret; > + > + node = v4l2_of_get_next_endpoint(ici->v4l2_dev.dev->of_node, > + node); > + if (!node) > + break; > + > + sofc = soc_camera_of_alloc_client(ici, node); > + if (!sofc) { > + dev_err(ici->v4l2_dev.dev, > + "%s(): failed to create a client device\n", > + __func__); > + of_node_put(node); > + break; > + } > + v4l2_of_parse_endpoint(node, &sofc->node); > + > + sasc = &sofc->sasc; > + ret = platform_device_add(sasc->pdev); > + if (ret < 0) { > + /* Useless thing, but keep trying */ > + platform_device_put(sasc->pdev); > + of_node_put(node); > + continue; > + } > + > + /* soc_camera_pdrv_probe() probed successfully */ > + icd = platform_get_drvdata(sasc->pdev); > + if (!icd) { > + /* Cannot be... */ > + platform_device_put(sasc->pdev); > + of_node_put(node); > + continue; > + } > + > + asd = sasc->sensor; > + asd->match_type = V4L2_ASYNC_MATCH_OF; > + asd->match.of.node = sofc->link_node; > + > + sasc->notifier.subdevs = &asd; > + sasc->notifier.num_subdevs = 1; > + sasc->notifier.bound = soc_camera_async_bound; > + sasc->notifier.unbind = soc_camera_async_unbind; > + sasc->notifier.complete = soc_camera_async_complete; > + > + icd->parent = ici->v4l2_dev.dev; > + > + ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); > + if (!ret) > + break; > + > + /* > + * We could destroy the icd in there error case here, but the > + * non-OF version doesn't do that, so, we can keep it around too > + */ > + } > +} > #else > #define soc_camera_i2c_init(icd, sdesc) (-ENODEV) > #define soc_camera_i2c_free(icd) do {} while (0) > #define scan_async_host(ici) do {} while (0) > +#define scan_of_host(ici) do {} while (0) > #endif > > /* Called during host-driver probe */ > @@ -1689,6 +1877,7 @@ static int soc_camera_remove(struct soc_camera_device *icd) > { > struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); > struct video_device *vdev = icd->vdev; > + struct v4l2_of_endpoint *node = sdesc->host_desc.node; > > v4l2_ctrl_handler_free(&icd->ctrl_handler); > if (vdev) { > @@ -1719,6 +1908,17 @@ static int soc_camera_remove(struct soc_camera_device *icd) > if (icd->sasc) > platform_device_unregister(icd->sasc->pdev); > > + if (node) { > + struct soc_camera_of_client *sofc = container_of(node, > + struct soc_camera_of_client, node); > + /* Don't dead-lock: remove the device here under the lock */ > + clear_bit(sofc->sasc.pdev->id, device_map); > + list_del(&icd->list); > + if (sofc->link_node) > + of_node_put(sofc->link_node); > + platform_device_unregister(sofc->sasc.pdev); > + } > + > return 0; > } > > @@ -1813,17 +2013,34 @@ int soc_camera_host_register(struct soc_camera_host *ici) > ici->ops->enum_framesizes = default_enum_framesizes; > > mutex_lock(&list_lock); > - list_for_each_entry(ix, &hosts, list) { > - if (ix->nr == ici->nr) { > + if (ici->nr == (unsigned char)-1) { > + /* E.g. OF host: dynamic number */ > + /* TODO: consider using IDR */ > + ici->nr = find_first_zero_bit(host_map, MAP_MAX_NUM); > + if (ici->nr >= MAP_MAX_NUM) { > ret = -EBUSY; > goto edevreg; > } > + } else { > + if (ici->nr >= MAP_MAX_NUM) { > + ret = -EINVAL; > + goto edevreg; > + } > + > + list_for_each_entry(ix, &hosts, list) { > + if (ix->nr == ici->nr) { > + ret = -EBUSY; > + goto edevreg; > + } > + } > } > > ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); > if (ret < 0) > goto edevreg; > > + set_bit(ici->nr, host_map); > + > list_add_tail(&ici->list, &hosts); > mutex_unlock(&list_lock); > > @@ -1837,9 +2054,11 @@ int soc_camera_host_register(struct soc_camera_host *ici) > * dynamically! > */ > scan_async_host(ici); > - else > + else if (!ici->v4l2_dev.dev->of_node) > /* Legacy: static platform devices from board data */ > scan_add_host(ici); > + else /* Scan subdevices from OF info */ > + scan_of_host(ici); > > return 0; > > @@ -1857,6 +2076,8 @@ void soc_camera_host_unregister(struct soc_camera_host *ici) > LIST_HEAD(notifiers); > > mutex_lock(&list_lock); > + > + clear_bit(ici->nr, host_map); > list_del(&ici->list); > list_for_each_entry(icd, &devices, list) > if (icd->iface == ici->nr && icd->sasc) { > @@ -1875,7 +2096,10 @@ void soc_camera_host_unregister(struct soc_camera_host *ici) > mutex_lock(&list_lock); > > list_for_each_entry_safe(icd, tmp, &devices, list) > - if (icd->iface == ici->nr) > + if (icd->iface == ici->nr && > + icd->parent == ici->v4l2_dev.dev && > + (to_soc_camera_control(icd) || > + icd->sdesc->host_desc.host_wait)) > soc_camera_remove(icd); > > mutex_unlock(&list_lock); > diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h > index 865246b..06b03b1 100644 > --- a/include/media/soc_camera.h > +++ b/include/media/soc_camera.h > @@ -138,6 +138,7 @@ struct soc_camera_host_ops { > > struct i2c_board_info; > struct regulator_bulk_data; > +struct v4l2_of_endpoint; > > struct soc_camera_subdev_desc { > /* Per camera SOCAM_SENSOR_* bus flags */ > @@ -177,7 +178,9 @@ struct soc_camera_host_desc { > int bus_id; > int i2c_adapter_id; > struct i2c_board_info *board_info; > + struct v4l2_of_endpoint *node; > const char *module_name; > + bool host_wait; > > /* > * For non-I2C devices platform has to provide methods to add a device > @@ -242,7 +245,9 @@ struct soc_camera_link { > int bus_id; > int i2c_adapter_id; > struct i2c_board_info *board_info; > + struct v4l2_of_endpoint *node; > const char *module_name; > + bool host_wait; > > /* > * For non-I2C devices platform has to provide methods to add a device > -- > 1.8.3.2 > -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tue, Feb 18, 2014 at 10:40 AM, Bryan Wu <cooloney@gmail.com> wrote: > On Wed, Feb 12, 2014 at 12:05 PM, Bryan Wu <cooloney@gmail.com> wrote: >> From: Guennadi Liakhovetski <g.liakhovetski@gmx.de> >> >> With OF we aren't getting platform data any more. To minimise changes we >> create all the missing data ourselves, including compulsory struct >> soc_camera_link objects. Host-client linking is now done, based on the OF >> data. Media bus numbers also have to be assigned dynamically. >> >> OF probing reuses the V4L2 Async API which is used by async non-OF probing. >> >> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> > > Hi Guennadi, > > Do you have chance to review my v2 patch? > > >> Signed-off-by: Bryan Wu <pengw@nvidia.com> >> --- >> v2: >> - move to use V4L2 Async API >> - cleanup some coding style issue >> - allocate struct soc_camera_desc sdesc on stack >> - cleanup unbalanced mutex operation >> >> drivers/media/platform/soc_camera/soc_camera.c | 232 ++++++++++++++++++++++++- >> include/media/soc_camera.h | 5 + >> 2 files changed, 233 insertions(+), 4 deletions(-) >> >> diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c >> index 4b8c024..ffe1254 100644 >> --- a/drivers/media/platform/soc_camera/soc_camera.c >> +++ b/drivers/media/platform/soc_camera/soc_camera.c >> @@ -23,6 +23,7 @@ >> #include <linux/list.h> >> #include <linux/module.h> >> #include <linux/mutex.h> >> +#include <linux/of.h> >> #include <linux/platform_device.h> >> #include <linux/pm_runtime.h> >> #include <linux/regulator/consumer.h> >> @@ -36,6 +37,7 @@ >> #include <media/v4l2-common.h> >> #include <media/v4l2-ioctl.h> >> #include <media/v4l2-dev.h> >> +#include <media/v4l2-of.h> >> #include <media/videobuf-core.h> >> #include <media/videobuf2-core.h> >> >> @@ -49,6 +51,7 @@ >> vb2_is_streaming(&(icd)->vb2_vidq)) >> >> #define MAP_MAX_NUM 32 >> +static DECLARE_BITMAP(host_map, MAP_MAX_NUM); >> static DECLARE_BITMAP(device_map, MAP_MAX_NUM); >> static LIST_HEAD(hosts); >> static LIST_HEAD(devices); >> @@ -65,6 +68,17 @@ struct soc_camera_async_client { >> struct list_head list; /* needed for clean up */ >> }; >> >> +struct soc_camera_of_client { >> + struct soc_camera_desc *sdesc; >> + struct soc_camera_async_client sasc; >> + struct v4l2_of_endpoint node; >> + struct dev_archdata archdata; >> + struct device_node *link_node; >> + union { >> + struct i2c_board_info i2c_info; >> + }; >> +}; >> + >> static int soc_camera_video_start(struct soc_camera_device *icd); >> static int video_dev_create(struct soc_camera_device *icd); >> >> @@ -1336,6 +1350,10 @@ static int soc_camera_i2c_init(struct soc_camera_device *icd, >> return -EPROBE_DEFER; >> } >> >> + /* OF probing skips following I2C init */ >> + if (shd->host_wait) >> + return 0; >> + >> ici = to_soc_camera_host(icd->parent); >> adap = i2c_get_adapter(shd->i2c_adapter_id); >> if (!adap) { >> @@ -1573,10 +1591,180 @@ static void scan_async_host(struct soc_camera_host *ici) >> asd += ici->asd_sizes[j]; >> } >> } >> + >> +static void soc_camera_of_i2c_ifill(struct soc_camera_of_client *sofc, >> + struct i2c_client *client) >> +{ >> + struct i2c_board_info *info = &sofc->i2c_info; >> + struct soc_camera_desc *sdesc = sofc->sdesc; >> + >> + /* on OF I2C devices platform_data == NULL */ >> + info->flags = client->flags; >> + info->addr = client->addr; >> + info->irq = client->irq; >> + info->archdata = &sofc->archdata; >> + >> + /* archdata is always empty on OF I2C devices */ >> + strlcpy(info->type, client->name, sizeof(info->type)); >> + >> + sdesc->host_desc.i2c_adapter_id = client->adapter->nr; >> +} >> + >> +static void soc_camera_of_i2c_info(struct device_node *node, >> + struct soc_camera_of_client *sofc) >> +{ >> + struct i2c_client *client; >> + struct soc_camera_desc *sdesc = sofc->sdesc; >> + struct i2c_board_info *info = &sofc->i2c_info; >> + struct device_node *port, *sensor, *bus; >> + >> + port = v4l2_of_get_remote_port(node); >> + if (!port) >> + return; >> + >> + /* Check the bus */ >> + sensor = of_get_parent(port); >> + bus = of_get_parent(sensor); >> + >> + if (of_node_cmp(bus->name, "i2c")) { >> + of_node_put(port); >> + of_node_put(sensor); >> + of_node_put(bus); >> + return; >> + } >> + >> + info->of_node = sensor; >> + sdesc->host_desc.board_info = info; >> + >> + client = of_find_i2c_device_by_node(sensor); >> + /* >> + * of_i2c_register_devices() took a reference to the OF node, it is not >> + * dropped, when the I2C device is removed, so, we don't need an >> + * additional reference. >> + */ >> + of_node_put(sensor); >> + if (client) { >> + soc_camera_of_i2c_ifill(sofc, client); >> + sofc->link_node = sensor; >> + put_device(&client->dev); >> + } >> + >> + /* client hasn't attached to I2C yet */ >> +} >> + >> +static struct soc_camera_of_client *soc_camera_of_alloc_client(const struct soc_camera_host *ici, >> + struct device_node *node) >> +{ >> + struct soc_camera_of_client *sofc; >> + struct v4l2_async_subdev *sensor; >> + struct soc_camera_desc sdesc = { .host_desc.host_wait = true,}; >> + int i, ret; >> + >> + sofc = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sofc), GFP_KERNEL); >> + if (!sofc) >> + return NULL; >> + >> + /* Allocate v4l2_async_subdev by ourselves */ >> + sensor = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sensor), GFP_KERNEL); >> + if (!sensor) >> + return NULL; >> + sofc->sasc.sensor = sensor; >> + >> + mutex_lock(&list_lock); >> + i = find_first_zero_bit(device_map, MAP_MAX_NUM); >> + if (i < MAP_MAX_NUM) >> + set_bit(i, device_map); >> + mutex_unlock(&list_lock); >> + if (i >= MAP_MAX_NUM) >> + return NULL; >> + sofc->sasc.pdev = platform_device_alloc("soc-camera-pdrv", i); >> + if (!sofc->sasc.pdev) >> + return NULL; >> + >> + sdesc.host_desc.node = &sofc->node; >> + sdesc.host_desc.bus_id = ici->nr; >> + >> + ret = platform_device_add_data(sofc->sasc.pdev, &sdesc, sizeof(sdesc)); >> + if (ret < 0) >> + return NULL; >> + sofc->sdesc = sofc->sasc.pdev->dev.platform_data; >> + >> + soc_camera_of_i2c_info(node, sofc); >> + >> + return sofc; >> +} >> + >> +static void scan_of_host(struct soc_camera_host *ici) >> +{ >> + struct soc_camera_of_client *sofc; >> + struct soc_camera_async_client *sasc; >> + struct v4l2_async_subdev *asd; >> + struct soc_camera_device *icd; >> + struct device_node *node = NULL; >> + >> + for (;;) { >> + int ret; >> + >> + node = v4l2_of_get_next_endpoint(ici->v4l2_dev.dev->of_node, >> + node); >> + if (!node) >> + break; >> + >> + sofc = soc_camera_of_alloc_client(ici, node); >> + if (!sofc) { >> + dev_err(ici->v4l2_dev.dev, >> + "%s(): failed to create a client device\n", >> + __func__); >> + of_node_put(node); >> + break; >> + } >> + v4l2_of_parse_endpoint(node, &sofc->node); >> + >> + sasc = &sofc->sasc; >> + ret = platform_device_add(sasc->pdev); >> + if (ret < 0) { >> + /* Useless thing, but keep trying */ >> + platform_device_put(sasc->pdev); >> + of_node_put(node); >> + continue; >> + } >> + >> + /* soc_camera_pdrv_probe() probed successfully */ >> + icd = platform_get_drvdata(sasc->pdev); >> + if (!icd) { >> + /* Cannot be... */ >> + platform_device_put(sasc->pdev); >> + of_node_put(node); >> + continue; >> + } >> + >> + asd = sasc->sensor; >> + asd->match_type = V4L2_ASYNC_MATCH_OF; >> + asd->match.of.node = sofc->link_node; >> + >> + sasc->notifier.subdevs = &asd; >> + sasc->notifier.num_subdevs = 1; >> + sasc->notifier.bound = soc_camera_async_bound; >> + sasc->notifier.unbind = soc_camera_async_unbind; >> + sasc->notifier.complete = soc_camera_async_complete; >> + >> + icd->parent = ici->v4l2_dev.dev; >> + >> + ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); >> + if (!ret) >> + break; >> + >> + /* >> + * We could destroy the icd in there error case here, but the >> + * non-OF version doesn't do that, so, we can keep it around too >> + */ >> + } >> +} >> #else >> #define soc_camera_i2c_init(icd, sdesc) (-ENODEV) >> #define soc_camera_i2c_free(icd) do {} while (0) >> #define scan_async_host(ici) do {} while (0) >> +#define scan_of_host(ici) do {} while (0) >> #endif >> >> /* Called during host-driver probe */ >> @@ -1689,6 +1877,7 @@ static int soc_camera_remove(struct soc_camera_device *icd) >> { >> struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); >> struct video_device *vdev = icd->vdev; >> + struct v4l2_of_endpoint *node = sdesc->host_desc.node; >> >> v4l2_ctrl_handler_free(&icd->ctrl_handler); >> if (vdev) { >> @@ -1719,6 +1908,17 @@ static int soc_camera_remove(struct soc_camera_device *icd) >> if (icd->sasc) >> platform_device_unregister(icd->sasc->pdev); >> >> + if (node) { >> + struct soc_camera_of_client *sofc = container_of(node, >> + struct soc_camera_of_client, node); >> + /* Don't dead-lock: remove the device here under the lock */ >> + clear_bit(sofc->sasc.pdev->id, device_map); >> + list_del(&icd->list); >> + if (sofc->link_node) >> + of_node_put(sofc->link_node); >> + platform_device_unregister(sofc->sasc.pdev); >> + } >> + >> return 0; >> } >> >> @@ -1813,17 +2013,34 @@ int soc_camera_host_register(struct soc_camera_host *ici) >> ici->ops->enum_framesizes = default_enum_framesizes; >> >> mutex_lock(&list_lock); >> - list_for_each_entry(ix, &hosts, list) { >> - if (ix->nr == ici->nr) { >> + if (ici->nr == (unsigned char)-1) { >> + /* E.g. OF host: dynamic number */ >> + /* TODO: consider using IDR */ >> + ici->nr = find_first_zero_bit(host_map, MAP_MAX_NUM); >> + if (ici->nr >= MAP_MAX_NUM) { >> ret = -EBUSY; >> goto edevreg; >> } >> + } else { >> + if (ici->nr >= MAP_MAX_NUM) { >> + ret = -EINVAL; >> + goto edevreg; >> + } >> + >> + list_for_each_entry(ix, &hosts, list) { >> + if (ix->nr == ici->nr) { >> + ret = -EBUSY; >> + goto edevreg; >> + } >> + } >> } >> >> ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); >> if (ret < 0) >> goto edevreg; >> >> + set_bit(ici->nr, host_map); >> + >> list_add_tail(&ici->list, &hosts); >> mutex_unlock(&list_lock); >> >> @@ -1837,9 +2054,11 @@ int soc_camera_host_register(struct soc_camera_host *ici) >> * dynamically! >> */ >> scan_async_host(ici); >> - else >> + else if (!ici->v4l2_dev.dev->of_node) >> /* Legacy: static platform devices from board data */ >> scan_add_host(ici); >> + else /* Scan subdevices from OF info */ >> + scan_of_host(ici); >> >> return 0; >> >> @@ -1857,6 +2076,8 @@ void soc_camera_host_unregister(struct soc_camera_host *ici) >> LIST_HEAD(notifiers); >> >> mutex_lock(&list_lock); >> + >> + clear_bit(ici->nr, host_map); >> list_del(&ici->list); >> list_for_each_entry(icd, &devices, list) >> if (icd->iface == ici->nr && icd->sasc) { >> @@ -1875,7 +2096,10 @@ void soc_camera_host_unregister(struct soc_camera_host *ici) >> mutex_lock(&list_lock); >> >> list_for_each_entry_safe(icd, tmp, &devices, list) >> - if (icd->iface == ici->nr) >> + if (icd->iface == ici->nr && >> + icd->parent == ici->v4l2_dev.dev && >> + (to_soc_camera_control(icd) || >> + icd->sdesc->host_desc.host_wait)) >> soc_camera_remove(icd); >> >> mutex_unlock(&list_lock); >> diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h >> index 865246b..06b03b1 100644 >> --- a/include/media/soc_camera.h >> +++ b/include/media/soc_camera.h >> @@ -138,6 +138,7 @@ struct soc_camera_host_ops { >> >> struct i2c_board_info; >> struct regulator_bulk_data; >> +struct v4l2_of_endpoint; >> >> struct soc_camera_subdev_desc { >> /* Per camera SOCAM_SENSOR_* bus flags */ >> @@ -177,7 +178,9 @@ struct soc_camera_host_desc { >> int bus_id; >> int i2c_adapter_id; >> struct i2c_board_info *board_info; >> + struct v4l2_of_endpoint *node; >> const char *module_name; >> + bool host_wait; >> >> /* >> * For non-I2C devices platform has to provide methods to add a device >> @@ -242,7 +245,9 @@ struct soc_camera_link { >> int bus_id; >> int i2c_adapter_id; >> struct i2c_board_info *board_info; >> + struct v4l2_of_endpoint *node; >> const char *module_name; >> + bool host_wait; >> >> /* >> * For non-I2C devices platform has to provide methods to add a device >> -- >> 1.8.3.2 >> I have to ping it again. -Bryan -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Bryan, On Mon, 24 Feb 2014, Bryan Wu wrote: > On Tue, Feb 18, 2014 at 10:40 AM, Bryan Wu <cooloney@gmail.com> wrote: > > On Wed, Feb 12, 2014 at 12:05 PM, Bryan Wu <cooloney@gmail.com> wrote: > >> From: Guennadi Liakhovetski <g.liakhovetski@gmx.de> > >> > >> With OF we aren't getting platform data any more. To minimise changes we > >> create all the missing data ourselves, including compulsory struct > >> soc_camera_link objects. Host-client linking is now done, based on the OF > >> data. Media bus numbers also have to be assigned dynamically. > >> > >> OF probing reuses the V4L2 Async API which is used by async non-OF probing. > >> > >> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> > > > > Hi Guennadi, > > > > Do you have chance to review my v2 patch? I looked at it briefly, the direction looks good now, but I'll have to find time to properly review it. Thanks Guennadi > >> Signed-off-by: Bryan Wu <pengw@nvidia.com> > >> --- > >> v2: > >> - move to use V4L2 Async API > >> - cleanup some coding style issue > >> - allocate struct soc_camera_desc sdesc on stack > >> - cleanup unbalanced mutex operation > >> > >> drivers/media/platform/soc_camera/soc_camera.c | 232 ++++++++++++++++++++++++- > >> include/media/soc_camera.h | 5 + > >> 2 files changed, 233 insertions(+), 4 deletions(-) > >> > >> diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c > >> index 4b8c024..ffe1254 100644 > >> --- a/drivers/media/platform/soc_camera/soc_camera.c > >> +++ b/drivers/media/platform/soc_camera/soc_camera.c > >> @@ -23,6 +23,7 @@ > >> #include <linux/list.h> > >> #include <linux/module.h> > >> #include <linux/mutex.h> > >> +#include <linux/of.h> > >> #include <linux/platform_device.h> > >> #include <linux/pm_runtime.h> > >> #include <linux/regulator/consumer.h> > >> @@ -36,6 +37,7 @@ > >> #include <media/v4l2-common.h> > >> #include <media/v4l2-ioctl.h> > >> #include <media/v4l2-dev.h> > >> +#include <media/v4l2-of.h> > >> #include <media/videobuf-core.h> > >> #include <media/videobuf2-core.h> > >> > >> @@ -49,6 +51,7 @@ > >> vb2_is_streaming(&(icd)->vb2_vidq)) > >> > >> #define MAP_MAX_NUM 32 > >> +static DECLARE_BITMAP(host_map, MAP_MAX_NUM); > >> static DECLARE_BITMAP(device_map, MAP_MAX_NUM); > >> static LIST_HEAD(hosts); > >> static LIST_HEAD(devices); > >> @@ -65,6 +68,17 @@ struct soc_camera_async_client { > >> struct list_head list; /* needed for clean up */ > >> }; > >> > >> +struct soc_camera_of_client { > >> + struct soc_camera_desc *sdesc; > >> + struct soc_camera_async_client sasc; > >> + struct v4l2_of_endpoint node; > >> + struct dev_archdata archdata; > >> + struct device_node *link_node; > >> + union { > >> + struct i2c_board_info i2c_info; > >> + }; > >> +}; > >> + > >> static int soc_camera_video_start(struct soc_camera_device *icd); > >> static int video_dev_create(struct soc_camera_device *icd); > >> > >> @@ -1336,6 +1350,10 @@ static int soc_camera_i2c_init(struct soc_camera_device *icd, > >> return -EPROBE_DEFER; > >> } > >> > >> + /* OF probing skips following I2C init */ > >> + if (shd->host_wait) > >> + return 0; > >> + > >> ici = to_soc_camera_host(icd->parent); > >> adap = i2c_get_adapter(shd->i2c_adapter_id); > >> if (!adap) { > >> @@ -1573,10 +1591,180 @@ static void scan_async_host(struct soc_camera_host *ici) > >> asd += ici->asd_sizes[j]; > >> } > >> } > >> + > >> +static void soc_camera_of_i2c_ifill(struct soc_camera_of_client *sofc, > >> + struct i2c_client *client) > >> +{ > >> + struct i2c_board_info *info = &sofc->i2c_info; > >> + struct soc_camera_desc *sdesc = sofc->sdesc; > >> + > >> + /* on OF I2C devices platform_data == NULL */ > >> + info->flags = client->flags; > >> + info->addr = client->addr; > >> + info->irq = client->irq; > >> + info->archdata = &sofc->archdata; > >> + > >> + /* archdata is always empty on OF I2C devices */ > >> + strlcpy(info->type, client->name, sizeof(info->type)); > >> + > >> + sdesc->host_desc.i2c_adapter_id = client->adapter->nr; > >> +} > >> + > >> +static void soc_camera_of_i2c_info(struct device_node *node, > >> + struct soc_camera_of_client *sofc) > >> +{ > >> + struct i2c_client *client; > >> + struct soc_camera_desc *sdesc = sofc->sdesc; > >> + struct i2c_board_info *info = &sofc->i2c_info; > >> + struct device_node *port, *sensor, *bus; > >> + > >> + port = v4l2_of_get_remote_port(node); > >> + if (!port) > >> + return; > >> + > >> + /* Check the bus */ > >> + sensor = of_get_parent(port); > >> + bus = of_get_parent(sensor); > >> + > >> + if (of_node_cmp(bus->name, "i2c")) { > >> + of_node_put(port); > >> + of_node_put(sensor); > >> + of_node_put(bus); > >> + return; > >> + } > >> + > >> + info->of_node = sensor; > >> + sdesc->host_desc.board_info = info; > >> + > >> + client = of_find_i2c_device_by_node(sensor); > >> + /* > >> + * of_i2c_register_devices() took a reference to the OF node, it is not > >> + * dropped, when the I2C device is removed, so, we don't need an > >> + * additional reference. > >> + */ > >> + of_node_put(sensor); > >> + if (client) { > >> + soc_camera_of_i2c_ifill(sofc, client); > >> + sofc->link_node = sensor; > >> + put_device(&client->dev); > >> + } > >> + > >> + /* client hasn't attached to I2C yet */ > >> +} > >> + > >> +static struct soc_camera_of_client *soc_camera_of_alloc_client(const struct soc_camera_host *ici, > >> + struct device_node *node) > >> +{ > >> + struct soc_camera_of_client *sofc; > >> + struct v4l2_async_subdev *sensor; > >> + struct soc_camera_desc sdesc = { .host_desc.host_wait = true,}; > >> + int i, ret; > >> + > >> + sofc = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sofc), GFP_KERNEL); > >> + if (!sofc) > >> + return NULL; > >> + > >> + /* Allocate v4l2_async_subdev by ourselves */ > >> + sensor = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sensor), GFP_KERNEL); > >> + if (!sensor) > >> + return NULL; > >> + sofc->sasc.sensor = sensor; > >> + > >> + mutex_lock(&list_lock); > >> + i = find_first_zero_bit(device_map, MAP_MAX_NUM); > >> + if (i < MAP_MAX_NUM) > >> + set_bit(i, device_map); > >> + mutex_unlock(&list_lock); > >> + if (i >= MAP_MAX_NUM) > >> + return NULL; > >> + sofc->sasc.pdev = platform_device_alloc("soc-camera-pdrv", i); > >> + if (!sofc->sasc.pdev) > >> + return NULL; > >> + > >> + sdesc.host_desc.node = &sofc->node; > >> + sdesc.host_desc.bus_id = ici->nr; > >> + > >> + ret = platform_device_add_data(sofc->sasc.pdev, &sdesc, sizeof(sdesc)); > >> + if (ret < 0) > >> + return NULL; > >> + sofc->sdesc = sofc->sasc.pdev->dev.platform_data; > >> + > >> + soc_camera_of_i2c_info(node, sofc); > >> + > >> + return sofc; > >> +} > >> + > >> +static void scan_of_host(struct soc_camera_host *ici) > >> +{ > >> + struct soc_camera_of_client *sofc; > >> + struct soc_camera_async_client *sasc; > >> + struct v4l2_async_subdev *asd; > >> + struct soc_camera_device *icd; > >> + struct device_node *node = NULL; > >> + > >> + for (;;) { > >> + int ret; > >> + > >> + node = v4l2_of_get_next_endpoint(ici->v4l2_dev.dev->of_node, > >> + node); > >> + if (!node) > >> + break; > >> + > >> + sofc = soc_camera_of_alloc_client(ici, node); > >> + if (!sofc) { > >> + dev_err(ici->v4l2_dev.dev, > >> + "%s(): failed to create a client device\n", > >> + __func__); > >> + of_node_put(node); > >> + break; > >> + } > >> + v4l2_of_parse_endpoint(node, &sofc->node); > >> + > >> + sasc = &sofc->sasc; > >> + ret = platform_device_add(sasc->pdev); > >> + if (ret < 0) { > >> + /* Useless thing, but keep trying */ > >> + platform_device_put(sasc->pdev); > >> + of_node_put(node); > >> + continue; > >> + } > >> + > >> + /* soc_camera_pdrv_probe() probed successfully */ > >> + icd = platform_get_drvdata(sasc->pdev); > >> + if (!icd) { > >> + /* Cannot be... */ > >> + platform_device_put(sasc->pdev); > >> + of_node_put(node); > >> + continue; > >> + } > >> + > >> + asd = sasc->sensor; > >> + asd->match_type = V4L2_ASYNC_MATCH_OF; > >> + asd->match.of.node = sofc->link_node; > >> + > >> + sasc->notifier.subdevs = &asd; > >> + sasc->notifier.num_subdevs = 1; > >> + sasc->notifier.bound = soc_camera_async_bound; > >> + sasc->notifier.unbind = soc_camera_async_unbind; > >> + sasc->notifier.complete = soc_camera_async_complete; > >> + > >> + icd->parent = ici->v4l2_dev.dev; > >> + > >> + ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); > >> + if (!ret) > >> + break; > >> + > >> + /* > >> + * We could destroy the icd in there error case here, but the > >> + * non-OF version doesn't do that, so, we can keep it around too > >> + */ > >> + } > >> +} > >> #else > >> #define soc_camera_i2c_init(icd, sdesc) (-ENODEV) > >> #define soc_camera_i2c_free(icd) do {} while (0) > >> #define scan_async_host(ici) do {} while (0) > >> +#define scan_of_host(ici) do {} while (0) > >> #endif > >> > >> /* Called during host-driver probe */ > >> @@ -1689,6 +1877,7 @@ static int soc_camera_remove(struct soc_camera_device *icd) > >> { > >> struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); > >> struct video_device *vdev = icd->vdev; > >> + struct v4l2_of_endpoint *node = sdesc->host_desc.node; > >> > >> v4l2_ctrl_handler_free(&icd->ctrl_handler); > >> if (vdev) { > >> @@ -1719,6 +1908,17 @@ static int soc_camera_remove(struct soc_camera_device *icd) > >> if (icd->sasc) > >> platform_device_unregister(icd->sasc->pdev); > >> > >> + if (node) { > >> + struct soc_camera_of_client *sofc = container_of(node, > >> + struct soc_camera_of_client, node); > >> + /* Don't dead-lock: remove the device here under the lock */ > >> + clear_bit(sofc->sasc.pdev->id, device_map); > >> + list_del(&icd->list); > >> + if (sofc->link_node) > >> + of_node_put(sofc->link_node); > >> + platform_device_unregister(sofc->sasc.pdev); > >> + } > >> + > >> return 0; > >> } > >> > >> @@ -1813,17 +2013,34 @@ int soc_camera_host_register(struct soc_camera_host *ici) > >> ici->ops->enum_framesizes = default_enum_framesizes; > >> > >> mutex_lock(&list_lock); > >> - list_for_each_entry(ix, &hosts, list) { > >> - if (ix->nr == ici->nr) { > >> + if (ici->nr == (unsigned char)-1) { > >> + /* E.g. OF host: dynamic number */ > >> + /* TODO: consider using IDR */ > >> + ici->nr = find_first_zero_bit(host_map, MAP_MAX_NUM); > >> + if (ici->nr >= MAP_MAX_NUM) { > >> ret = -EBUSY; > >> goto edevreg; > >> } > >> + } else { > >> + if (ici->nr >= MAP_MAX_NUM) { > >> + ret = -EINVAL; > >> + goto edevreg; > >> + } > >> + > >> + list_for_each_entry(ix, &hosts, list) { > >> + if (ix->nr == ici->nr) { > >> + ret = -EBUSY; > >> + goto edevreg; > >> + } > >> + } > >> } > >> > >> ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); > >> if (ret < 0) > >> goto edevreg; > >> > >> + set_bit(ici->nr, host_map); > >> + > >> list_add_tail(&ici->list, &hosts); > >> mutex_unlock(&list_lock); > >> > >> @@ -1837,9 +2054,11 @@ int soc_camera_host_register(struct soc_camera_host *ici) > >> * dynamically! > >> */ > >> scan_async_host(ici); > >> - else > >> + else if (!ici->v4l2_dev.dev->of_node) > >> /* Legacy: static platform devices from board data */ > >> scan_add_host(ici); > >> + else /* Scan subdevices from OF info */ > >> + scan_of_host(ici); > >> > >> return 0; > >> > >> @@ -1857,6 +2076,8 @@ void soc_camera_host_unregister(struct soc_camera_host *ici) > >> LIST_HEAD(notifiers); > >> > >> mutex_lock(&list_lock); > >> + > >> + clear_bit(ici->nr, host_map); > >> list_del(&ici->list); > >> list_for_each_entry(icd, &devices, list) > >> if (icd->iface == ici->nr && icd->sasc) { > >> @@ -1875,7 +2096,10 @@ void soc_camera_host_unregister(struct soc_camera_host *ici) > >> mutex_lock(&list_lock); > >> > >> list_for_each_entry_safe(icd, tmp, &devices, list) > >> - if (icd->iface == ici->nr) > >> + if (icd->iface == ici->nr && > >> + icd->parent == ici->v4l2_dev.dev && > >> + (to_soc_camera_control(icd) || > >> + icd->sdesc->host_desc.host_wait)) > >> soc_camera_remove(icd); > >> > >> mutex_unlock(&list_lock); > >> diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h > >> index 865246b..06b03b1 100644 > >> --- a/include/media/soc_camera.h > >> +++ b/include/media/soc_camera.h > >> @@ -138,6 +138,7 @@ struct soc_camera_host_ops { > >> > >> struct i2c_board_info; > >> struct regulator_bulk_data; > >> +struct v4l2_of_endpoint; > >> > >> struct soc_camera_subdev_desc { > >> /* Per camera SOCAM_SENSOR_* bus flags */ > >> @@ -177,7 +178,9 @@ struct soc_camera_host_desc { > >> int bus_id; > >> int i2c_adapter_id; > >> struct i2c_board_info *board_info; > >> + struct v4l2_of_endpoint *node; > >> const char *module_name; > >> + bool host_wait; > >> > >> /* > >> * For non-I2C devices platform has to provide methods to add a device > >> @@ -242,7 +245,9 @@ struct soc_camera_link { > >> int bus_id; > >> int i2c_adapter_id; > >> struct i2c_board_info *board_info; > >> + struct v4l2_of_endpoint *node; > >> const char *module_name; > >> + bool host_wait; > >> > >> /* > >> * For non-I2C devices platform has to provide methods to add a device > >> -- > >> 1.8.3.2 > >> > > > I have to ping it again. > > -Bryan > --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/ -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Mon, Feb 24, 2014 at 10:19 PM, Guennadi Liakhovetski <g.liakhovetski@gmx.de> wrote: > Hi Bryan, > > On Mon, 24 Feb 2014, Bryan Wu wrote: > >> On Tue, Feb 18, 2014 at 10:40 AM, Bryan Wu <cooloney@gmail.com> wrote: >> > On Wed, Feb 12, 2014 at 12:05 PM, Bryan Wu <cooloney@gmail.com> wrote: >> >> From: Guennadi Liakhovetski <g.liakhovetski@gmx.de> >> >> >> >> With OF we aren't getting platform data any more. To minimise changes we >> >> create all the missing data ourselves, including compulsory struct >> >> soc_camera_link objects. Host-client linking is now done, based on the OF >> >> data. Media bus numbers also have to be assigned dynamically. >> >> >> >> OF probing reuses the V4L2 Async API which is used by async non-OF probing. >> >> >> >> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> >> > >> > Hi Guennadi, >> > >> > Do you have chance to review my v2 patch? > > I looked at it briefly, the direction looks good now, but I'll have to > find time to properly review it. > Hi Guennadi, Do you have chance to review this patch? Thanks, -Bryan > >> >> Signed-off-by: Bryan Wu <pengw@nvidia.com> >> >> --- >> >> v2: >> >> - move to use V4L2 Async API >> >> - cleanup some coding style issue >> >> - allocate struct soc_camera_desc sdesc on stack >> >> - cleanup unbalanced mutex operation >> >> >> >> drivers/media/platform/soc_camera/soc_camera.c | 232 ++++++++++++++++++++++++- >> >> include/media/soc_camera.h | 5 + >> >> 2 files changed, 233 insertions(+), 4 deletions(-) >> >> >> >> diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c >> >> index 4b8c024..ffe1254 100644 >> >> --- a/drivers/media/platform/soc_camera/soc_camera.c >> >> +++ b/drivers/media/platform/soc_camera/soc_camera.c >> >> @@ -23,6 +23,7 @@ >> >> #include <linux/list.h> >> >> #include <linux/module.h> >> >> #include <linux/mutex.h> >> >> +#include <linux/of.h> >> >> #include <linux/platform_device.h> >> >> #include <linux/pm_runtime.h> >> >> #include <linux/regulator/consumer.h> >> >> @@ -36,6 +37,7 @@ >> >> #include <media/v4l2-common.h> >> >> #include <media/v4l2-ioctl.h> >> >> #include <media/v4l2-dev.h> >> >> +#include <media/v4l2-of.h> >> >> #include <media/videobuf-core.h> >> >> #include <media/videobuf2-core.h> >> >> >> >> @@ -49,6 +51,7 @@ >> >> vb2_is_streaming(&(icd)->vb2_vidq)) >> >> >> >> #define MAP_MAX_NUM 32 >> >> +static DECLARE_BITMAP(host_map, MAP_MAX_NUM); >> >> static DECLARE_BITMAP(device_map, MAP_MAX_NUM); >> >> static LIST_HEAD(hosts); >> >> static LIST_HEAD(devices); >> >> @@ -65,6 +68,17 @@ struct soc_camera_async_client { >> >> struct list_head list; /* needed for clean up */ >> >> }; >> >> >> >> +struct soc_camera_of_client { >> >> + struct soc_camera_desc *sdesc; >> >> + struct soc_camera_async_client sasc; >> >> + struct v4l2_of_endpoint node; >> >> + struct dev_archdata archdata; >> >> + struct device_node *link_node; >> >> + union { >> >> + struct i2c_board_info i2c_info; >> >> + }; >> >> +}; >> >> + >> >> static int soc_camera_video_start(struct soc_camera_device *icd); >> >> static int video_dev_create(struct soc_camera_device *icd); >> >> >> >> @@ -1336,6 +1350,10 @@ static int soc_camera_i2c_init(struct soc_camera_device *icd, >> >> return -EPROBE_DEFER; >> >> } >> >> >> >> + /* OF probing skips following I2C init */ >> >> + if (shd->host_wait) >> >> + return 0; >> >> + >> >> ici = to_soc_camera_host(icd->parent); >> >> adap = i2c_get_adapter(shd->i2c_adapter_id); >> >> if (!adap) { >> >> @@ -1573,10 +1591,180 @@ static void scan_async_host(struct soc_camera_host *ici) >> >> asd += ici->asd_sizes[j]; >> >> } >> >> } >> >> + >> >> +static void soc_camera_of_i2c_ifill(struct soc_camera_of_client *sofc, >> >> + struct i2c_client *client) >> >> +{ >> >> + struct i2c_board_info *info = &sofc->i2c_info; >> >> + struct soc_camera_desc *sdesc = sofc->sdesc; >> >> + >> >> + /* on OF I2C devices platform_data == NULL */ >> >> + info->flags = client->flags; >> >> + info->addr = client->addr; >> >> + info->irq = client->irq; >> >> + info->archdata = &sofc->archdata; >> >> + >> >> + /* archdata is always empty on OF I2C devices */ >> >> + strlcpy(info->type, client->name, sizeof(info->type)); >> >> + >> >> + sdesc->host_desc.i2c_adapter_id = client->adapter->nr; >> >> +} >> >> + >> >> +static void soc_camera_of_i2c_info(struct device_node *node, >> >> + struct soc_camera_of_client *sofc) >> >> +{ >> >> + struct i2c_client *client; >> >> + struct soc_camera_desc *sdesc = sofc->sdesc; >> >> + struct i2c_board_info *info = &sofc->i2c_info; >> >> + struct device_node *port, *sensor, *bus; >> >> + >> >> + port = v4l2_of_get_remote_port(node); >> >> + if (!port) >> >> + return; >> >> + >> >> + /* Check the bus */ >> >> + sensor = of_get_parent(port); >> >> + bus = of_get_parent(sensor); >> >> + >> >> + if (of_node_cmp(bus->name, "i2c")) { >> >> + of_node_put(port); >> >> + of_node_put(sensor); >> >> + of_node_put(bus); >> >> + return; >> >> + } >> >> + >> >> + info->of_node = sensor; >> >> + sdesc->host_desc.board_info = info; >> >> + >> >> + client = of_find_i2c_device_by_node(sensor); >> >> + /* >> >> + * of_i2c_register_devices() took a reference to the OF node, it is not >> >> + * dropped, when the I2C device is removed, so, we don't need an >> >> + * additional reference. >> >> + */ >> >> + of_node_put(sensor); >> >> + if (client) { >> >> + soc_camera_of_i2c_ifill(sofc, client); >> >> + sofc->link_node = sensor; >> >> + put_device(&client->dev); >> >> + } >> >> + >> >> + /* client hasn't attached to I2C yet */ >> >> +} >> >> + >> >> +static struct soc_camera_of_client *soc_camera_of_alloc_client(const struct soc_camera_host *ici, >> >> + struct device_node *node) >> >> +{ >> >> + struct soc_camera_of_client *sofc; >> >> + struct v4l2_async_subdev *sensor; >> >> + struct soc_camera_desc sdesc = { .host_desc.host_wait = true,}; >> >> + int i, ret; >> >> + >> >> + sofc = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sofc), GFP_KERNEL); >> >> + if (!sofc) >> >> + return NULL; >> >> + >> >> + /* Allocate v4l2_async_subdev by ourselves */ >> >> + sensor = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sensor), GFP_KERNEL); >> >> + if (!sensor) >> >> + return NULL; >> >> + sofc->sasc.sensor = sensor; >> >> + >> >> + mutex_lock(&list_lock); >> >> + i = find_first_zero_bit(device_map, MAP_MAX_NUM); >> >> + if (i < MAP_MAX_NUM) >> >> + set_bit(i, device_map); >> >> + mutex_unlock(&list_lock); >> >> + if (i >= MAP_MAX_NUM) >> >> + return NULL; >> >> + sofc->sasc.pdev = platform_device_alloc("soc-camera-pdrv", i); >> >> + if (!sofc->sasc.pdev) >> >> + return NULL; >> >> + >> >> + sdesc.host_desc.node = &sofc->node; >> >> + sdesc.host_desc.bus_id = ici->nr; >> >> + >> >> + ret = platform_device_add_data(sofc->sasc.pdev, &sdesc, sizeof(sdesc)); >> >> + if (ret < 0) >> >> + return NULL; >> >> + sofc->sdesc = sofc->sasc.pdev->dev.platform_data; >> >> + >> >> + soc_camera_of_i2c_info(node, sofc); >> >> + >> >> + return sofc; >> >> +} >> >> + >> >> +static void scan_of_host(struct soc_camera_host *ici) >> >> +{ >> >> + struct soc_camera_of_client *sofc; >> >> + struct soc_camera_async_client *sasc; >> >> + struct v4l2_async_subdev *asd; >> >> + struct soc_camera_device *icd; >> >> + struct device_node *node = NULL; >> >> + >> >> + for (;;) { >> >> + int ret; >> >> + >> >> + node = v4l2_of_get_next_endpoint(ici->v4l2_dev.dev->of_node, >> >> + node); >> >> + if (!node) >> >> + break; >> >> + >> >> + sofc = soc_camera_of_alloc_client(ici, node); >> >> + if (!sofc) { >> >> + dev_err(ici->v4l2_dev.dev, >> >> + "%s(): failed to create a client device\n", >> >> + __func__); >> >> + of_node_put(node); >> >> + break; >> >> + } >> >> + v4l2_of_parse_endpoint(node, &sofc->node); >> >> + >> >> + sasc = &sofc->sasc; >> >> + ret = platform_device_add(sasc->pdev); >> >> + if (ret < 0) { >> >> + /* Useless thing, but keep trying */ >> >> + platform_device_put(sasc->pdev); >> >> + of_node_put(node); >> >> + continue; >> >> + } >> >> + >> >> + /* soc_camera_pdrv_probe() probed successfully */ >> >> + icd = platform_get_drvdata(sasc->pdev); >> >> + if (!icd) { >> >> + /* Cannot be... */ >> >> + platform_device_put(sasc->pdev); >> >> + of_node_put(node); >> >> + continue; >> >> + } >> >> + >> >> + asd = sasc->sensor; >> >> + asd->match_type = V4L2_ASYNC_MATCH_OF; >> >> + asd->match.of.node = sofc->link_node; >> >> + >> >> + sasc->notifier.subdevs = &asd; >> >> + sasc->notifier.num_subdevs = 1; >> >> + sasc->notifier.bound = soc_camera_async_bound; >> >> + sasc->notifier.unbind = soc_camera_async_unbind; >> >> + sasc->notifier.complete = soc_camera_async_complete; >> >> + >> >> + icd->parent = ici->v4l2_dev.dev; >> >> + >> >> + ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); >> >> + if (!ret) >> >> + sjUmBMDe3fq35HMObreak; >> >> + >> >> + /* >> >> + * We could destroy the icd in there error case here, but the >> >> + * non-OF version doesn't do that, so, we can keep it around too >> >> + */ >> >> + } >> >> +} >> >> #else >> >> #define soc_camera_i2c_init(icd, sdesc) (-ENODEV) >> >> #define soc_camera_i2c_free(icd) do {} while (0) >> >> #define scan_async_host(ici) do {} while (0) >> >> +#define scan_of_host(ici) do {} while (0) >> >> #endif >> >> >> >> /* Called during host-driver probe */ >> >> @@ -1689,6 +1877,7 @@ static int soc_camera_remove(struct soc_camera_device *icd) >> >> { >> >> struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); >> >> struct video_device *vdev = icd->vdev; >> >> + struct v4l2_of_endpoint *node = sdesc->host_desc.node; >> >> >> >> v4l2_ctrl_handler_free(&icd->ctrl_handler); >> >> if (vdev) { >> >> @@ -1719,6 +1908,17 @@ static int soc_camera_remove(struct soc_camera_device *icd) >> >> if (icd->sasc) >> >> platform_device_unregister(icd->sasc->pdev); >> >> >> >> + if (node) { >> >> + struct soc_camera_of_client *sofc = container_of(node, >> >> + struct soc_camera_of_client, node); >> >> + /* Don't dead-lock: remove the device here under the lock */ >> >> + clear_bit(sofc->sasc.pdev->id, device_map); >> >> + list_del(&icd->list); >> >> + if (sofc->link_node) >> >> + of_node_put(sofc->link_node); >> >> + platform_device_unregister(sofc->sasc.pdev); >> >> + } >> >> + >> >> return 0; >> >> } >> >> >> >> @@ -1813,17 +2013,34 @@ int soc_camera_host_register(struct soc_camera_host *ici) >> >> ici->ops->enum_framesizes = default_enum_framesizes; >> >> >> >> mutex_lock(&list_lock); >> >> - list_for_each_entry(ix, &hosts, list) { >> >> - if (ix->nr == ici->nr) { >> >> + if (ici->nr == (unsigned char)-1) { >> >> + /* E.g. OF host: dynamic number */ >> >> + /* TODO: consider using IDR */ >> >> + ici->nr = find_first_zero_bit(host_map, MAP_MAX_NUM); >> >> + if (ici->nr >= MAP_MAX_NUM) { >> >> ret = -EBUSY; >> >> goto edevreg; >> >> } >> >> + } else { >> >> + if (ici->nr >= MAP_MAX_NUM) { >> >> + ret = -EINVAL; >> >> + goto edevreg; >> >> + } >> >> + >> >> + list_for_each_entry(ix, &hosts, list) { >> >> + if (ix->nr == ici->nr) { >> >> + ret = -EBUSY; >> >> + goto edevreg; >> >> + } >> >> + } >> >> } >> >> >> >> ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); >> >> if (ret < 0) >> >> goto edevreg; >> >> >> >> + set_bit(ici->nr, host_map); >> >> + >> >> list_add_tail(&ici->list, &hosts); >> >> mutex_unlock(&list_lock); >> >> >> >> @@ -1837,9 +2054,11 @@ int soc_camera_host_register(struct soc_camera_host *ici) >> >> * dynamically! >> >> */ >> >> scan_async_host(ici); >> >> - else >> >> + else if (!ici->v4l2_dev.dev->of_node) >> >> /* Legacy: static platform devices from board data */ >> >> scan_add_host(ici); >> >> + else /* Scan subdevices from OF info */ >> >> + scan_of_host(ici); >> >> >> >> return 0; >> >> >> >> @@ -1857,6 +2076,8 @@ void soc_camera_host_unregister(struct soc_camera_host *ici) >> >> LIST_HEAD(notifiers); >> >> >> >> mutex_lock(&list_lock); >> >> + >> >> + clear_bit(ici->nr, host_map); >> >> list_del(&ici->list); >> >> list_for_each_entry(icd, &devices, list) >> >> if (icd->iface == ici->nr && icd->sasc) { >> >> @@ -1875,7 +2096,10 @@ void soc_camera_host_unregister(struct soc_camera_host *ici) >> >> mutex_lock(&list_lock); >> >> >> >> list_for_each_entry_safe(icd, tmp, &devices, list) >> >> - if (icd->iface == ici->nr) >> >> + if (icd->iface == ici->nr && >> >> + icd->parent == ici->v4l2_dev.dev && >> >> + (to_soc_camera_control(icd) || >> >> + icd->sdesc->host_desc.host_wait)) >> >> soc_camera_remove(icd); >> >> >> >> mutex_unlock(&list_lock); >> >> diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h >> >> index 865246b..06b03b1 100644 >> >> --- a/include/media/soc_camera.h >> >> +++ b/include/media/soc_camera.h >> >> @@ -138,6 +138,7 @@ struct soc_camera_host_ops { >> >> >> >> struct i2c_board_info; >> >> struct regulator_bulk_data; >> >> +struct v4l2_of_endpoint; >> >> >> >> struct soc_camera_subdev_desc { >> >> /* Per camera SOCAM_SENSOR_* bus flags */ >> >> @@ -177,7 +178,9 @@ struct soc_camera_host_desc { >> >> int bus_id; >> >> int i2c_adapter_id; >> >> struct i2c_board_info *board_info; >> >> + struct v4l2_of_endpoint *node; >> >> const char *module_name; >> >> + bool host_wait; >> >> >> >> /* >> >> * For non-I2C devices platform has to provide methods to add a device >> >> @@ -242,7 +245,9 @@ struct soc_camera_link { >> >> int bus_id; >> >> int i2c_adapter_id; >> >> struct i2c_board_info *board_info; >> >> + struct v4l2_of_endpoint *node; >> >> const char *module_name; >> >> + bool host_wait; >> >> >> >> /* >> >> * For non-I2C devices platform has to provide methods to add a device >> >> -- >> >> 1.8.3.2 >> >> >> >> >> I have to ping it again. >> >> -Bryan >> > > --- > Guennadi Liakhovetski, Ph.D. > Freelance Open-Source Software Developer > http://www.open-technology.de/ -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 06/03/14 23:12, Bryan Wu wrote: > On Mon, Feb 24, 2014 at 10:19 PM, Guennadi Liakhovetski > <g.liakhovetski@gmx.de> wrote: >> Hi Bryan, >> >> On Mon, 24 Feb 2014, Bryan Wu wrote: >> >>> On Tue, Feb 18, 2014 at 10:40 AM, Bryan Wu <cooloney@gmail.com> wrote: >>>> On Wed, Feb 12, 2014 at 12:05 PM, Bryan Wu <cooloney@gmail.com> wrote: >>>>> From: Guennadi Liakhovetski <g.liakhovetski@gmx.de> >>>>> >>>>> With OF we aren't getting platform data any more. To minimise changes we >>>>> create all the missing data ourselves, including compulsory struct >>>>> soc_camera_link objects. Host-client linking is now done, based on the OF >>>>> data. Media bus numbers also have to be assigned dynamically. >>>>> >>>>> OF probing reuses the V4L2 Async API which is used by async non-OF probing. >>>>> >>>>> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> >>>> >>>> Hi Guennadi, >>>> >>>> Do you have chance to review my v2 patch? >> >> I looked at it briefly, the direction looks good now, but I'll have to >> find time to properly review it. >> > > Hi Guennadi, > > Do you have chance to review this patch? > > Thanks, > -Bryan > > >> >>>>> Signed-off-by: Bryan Wu <pengw@nvidia.com> >>>>> --- >>>>> v2: >>>>> - move to use V4L2 Async API >>>>> - cleanup some coding style issue >>>>> - allocate struct soc_camera_desc sdesc on stack >>>>> - cleanup unbalanced mutex operation >>>>> >>>>> drivers/media/platform/soc_camera/soc_camera.c | 232 ++++++++++++++++++++++++- >>>>> include/media/soc_camera.h | 5 + >>>>> 2 files changed, 233 insertions(+), 4 deletions(-) >>>>> >>>>> diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c >>>>> index 4b8c024..ffe1254 100644 >>>>> --- a/drivers/media/platform/soc_camera/soc_camera.c >>>>> +++ b/drivers/media/platform/soc_camera/soc_camera.c >>>>> @@ -23,6 +23,7 @@ >>>>> #include <linux/list.h> >>>>> #include <linux/module.h> >>>>> #include <linux/mutex.h> >>>>> +#include <linux/of.h> >>>>> #include <linux/platform_device.h> >>>>> #include <linux/pm_runtime.h> >>>>> #include <linux/regulator/consumer.h> >>>>> @@ -36,6 +37,7 @@ >>>>> #include <media/v4l2-common.h> >>>>> #include <media/v4l2-ioctl.h> >>>>> #include <media/v4l2-dev.h> >>>>> +#include <media/v4l2-of.h> >>>>> #include <media/videobuf-core.h> >>>>> #include <media/videobuf2-core.h> >>>>> >>>>> @@ -49,6 +51,7 @@ >>>>> vb2_is_streaming(&(icd)->vb2_vidq)) >>>>> >>>>> #define MAP_MAX_NUM 32 >>>>> +static DECLARE_BITMAP(host_map, MAP_MAX_NUM); >>>>> static DECLARE_BITMAP(device_map, MAP_MAX_NUM); >>>>> static LIST_HEAD(hosts); >>>>> static LIST_HEAD(devices); >>>>> @@ -65,6 +68,17 @@ struct soc_camera_async_client { >>>>> struct list_head list; /* needed for clean up */ >>>>> }; >>>>> >>>>> +struct soc_camera_of_client { >>>>> + struct soc_camera_desc *sdesc; >>>>> + struct soc_camera_async_client sasc; >>>>> + struct v4l2_of_endpoint node; >>>>> + struct dev_archdata archdata; >>>>> + struct device_node *link_node; >>>>> + union { >>>>> + struct i2c_board_info i2c_info; >>>>> + }; >>>>> +}; I don't understand why you need this for the async api case, since you do not need to create any new i2c info. The i2c device should be probed using OF and linked via the async probe api. I did a much simpler version of this that I was going to post today that works with the renesas vin driver. >>>>> + >>>>> static int soc_camera_video_start(struct soc_camera_device *icd); >>>>> static int video_dev_create(struct soc_camera_device *icd); >>>>> >>>>> @@ -1336,6 +1350,10 @@ static int soc_camera_i2c_init(struct soc_camera_device *icd, >>>>> return -EPROBE_DEFER; >>>>> } >>>>> >>>>> + /* OF probing skips following I2C init */ >>>>> + if (shd->host_wait) >>>>> + return 0; >>>>> + >>>>> ici = to_soc_camera_host(icd->parent); >>>>> adap = i2c_get_adapter(shd->i2c_adapter_id); >>>>> if (!adap) { >>>>> @@ -1573,10 +1591,180 @@ static void scan_async_host(struct soc_camera_host *ici) >>>>> asd += ici->asd_sizes[j]; >>>>> } >>>>> } >>>>> + >>>>> +static void soc_camera_of_i2c_ifill(struct soc_camera_of_client *sofc, >>>>> + struct i2c_client *client) >>>>> +{ >>>>> + struct i2c_board_info *info = &sofc->i2c_info; >>>>> + struct soc_camera_desc *sdesc = sofc->sdesc; >>>>> + >>>>> + /* on OF I2C devices platform_data == NULL */ >>>>> + info->flags = client->flags; >>>>> + info->addr = client->addr; >>>>> + info->irq = client->irq; >>>>> + info->archdata = &sofc->archdata; >>>>> + >>>>> + /* archdata is always empty on OF I2C devices */ >>>>> + strlcpy(info->type, client->name, sizeof(info->type)); >>>>> + >>>>> + sdesc->host_desc.i2c_adapter_id = client->adapter->nr; >>>>> +} >>>>> + >>>>> +static void soc_camera_of_i2c_info(struct device_node *node, >>>>> + struct soc_camera_of_client *sofc) >>>>> +{ >>>>> + struct i2c_client *client; >>>>> + struct soc_camera_desc *sdesc = sofc->sdesc; >>>>> + struct i2c_board_info *info = &sofc->i2c_info; >>>>> + struct device_node *port, *sensor, *bus; >>>>> + >>>>> + port = v4l2_of_get_remote_port(node); >>>>> + if (!port) >>>>> + return; >>>>> + >>>>> + /* Check the bus */ >>>>> + sensor = of_get_parent(port); >>>>> + bus = of_get_parent(sensor); >>>>> + >>>>> + if (of_node_cmp(bus->name, "i2c")) { >>>>> + of_node_put(port); >>>>> + of_node_put(sensor); >>>>> + of_node_put(bus); >>>>> + return; >>>>> + } >>>>> + >>>>> + info->of_node = sensor; >>>>> + sdesc->host_desc.board_info = info; >>>>> + >>>>> + client = of_find_i2c_device_by_node(sensor); >>>>> + /* >>>>> + * of_i2c_register_devices() took a reference to the OF node, it is not >>>>> + * dropped, when the I2C device is removed, so, we don't need an >>>>> + * additional reference. >>>>> + */ >>>>> + of_node_put(sensor); >>>>> + if (client) { >>>>> + soc_camera_of_i2c_ifill(sofc, client); >>>>> + sofc->link_node = sensor; >>>>> + put_device(&client->dev); >>>>> + } >>>>> + >>>>> + /* client hasn't attached to I2C yet */ >>>>> +} >>>>> + >>>>> +static struct soc_camera_of_client *soc_camera_of_alloc_client(const struct soc_camera_host *ici, >>>>> + struct device_node *node) >>>>> +{ >>>>> + struct soc_camera_of_client *sofc; >>>>> + struct v4l2_async_subdev *sensor; >>>>> + struct soc_camera_desc sdesc = { .host_desc.host_wait = true,}; >>>>> + int i, ret; >>>>> + >>>>> + sofc = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sofc), GFP_KERNEL); >>>>> + if (!sofc) >>>>> + return NULL; >>>>> + >>>>> + /* Allocate v4l2_async_subdev by ourselves */ >>>>> + sensor = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sensor), GFP_KERNEL); >>>>> + if (!sensor) >>>>> + return NULL; >>>>> + sofc->sasc.sensor = sensor; >>>>> + >>>>> + mutex_lock(&list_lock); >>>>> + i = find_first_zero_bit(device_map, MAP_MAX_NUM); >>>>> + if (i < MAP_MAX_NUM) >>>>> + set_bit(i, device_map); >>>>> + mutex_unlock(&list_lock); >>>>> + if (i >= MAP_MAX_NUM) >>>>> + return NULL; >>>>> + sofc->sasc.pdev = platform_device_alloc("soc-camera-pdrv", i); >>>>> + if (!sofc->sasc.pdev) >>>>> + return NULL; >>>>> + >>>>> + sdesc.host_desc.node = &sofc->node; >>>>> + sdesc.host_desc.bus_id = ici->nr; >>>>> + >>>>> + ret = platform_device_add_data(sofc->sasc.pdev, &sdesc, sizeof(sdesc)); >>>>> + if (ret < 0) >>>>> + return NULL; >>>>> + sofc->sdesc = sofc->sasc.pdev->dev.platform_data; >>>>> + >>>>> + soc_camera_of_i2c_info(node, sofc); >>>>> + >>>>> + return sofc; >>>>> +} >>>>> + >>>>> +static void scan_of_host(struct soc_camera_host *ici) >>>>> +{ >>>>> + struct soc_camera_of_client *sofc; >>>>> + struct soc_camera_async_client *sasc; >>>>> + struct v4l2_async_subdev *asd; >>>>> + struct soc_camera_device *icd; >>>>> + struct device_node *node = NULL; >>>>> + >>>>> + for (;;) { >>>>> + int ret; >>>>> + >>>>> + node = v4l2_of_get_next_endpoint(ici->v4l2_dev.dev->of_node, >>>>> + node); >>>>> + if (!node) >>>>> + break; >>>>> + >>>>> + sofc = soc_camera_of_alloc_client(ici, node); >>>>> + if (!sofc) { >>>>> + dev_err(ici->v4l2_dev.dev, >>>>> + "%s(): failed to create a client device\n", >>>>> + __func__); >>>>> + of_node_put(node); >>>>> + break; >>>>> + } >>>>> + v4l2_of_parse_endpoint(node, &sofc->node); >>>>> + >>>>> + sasc = &sofc->sasc; >>>>> + ret = platform_device_add(sasc->pdev); >>>>> + if (ret < 0) { >>>>> + /* Useless thing, but keep trying */ >>>>> + platform_device_put(sasc->pdev); >>>>> + of_node_put(node); >>>>> + continue; >>>>> + } >>>>> + >>>>> + /* soc_camera_pdrv_probe() probed successfully */ >>>>> + icd = platform_get_drvdata(sasc->pdev); >>>>> + if (!icd) { >>>>> + /* Cannot be... */ >>>>> + platform_device_put(sasc->pdev); >>>>> + of_node_put(node); >>>>> + continue; >>>>> + } >>>>> + >>>>> + asd = sasc->sensor; >>>>> + asd->match_type = V4L2_ASYNC_MATCH_OF; >>>>> + asd->match.of.node = sofc->link_node; >>>>> + >>>>> + sasc->notifier.subdevs = &asd; >>>>> + sasc->notifier.num_subdevs = 1; >>>>> + sasc->notifier.bound = soc_camera_async_bound; >>>>> + sasc->notifier.unbind = soc_camera_async_unbind; >>>>> + sasc->notifier.complete = soc_camera_async_complete; >>>>> + >>>>> + icd->parent = ici->v4l2_dev.dev; >>>>> + >>>>> + ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); >>>>> + if (!ret) >>>>> + sjUmBMDe3fq35HMObreak; >>>>> + >>>>> + /* >>>>> + * We could destroy the icd in there error case here, but the >>>>> + * non-OF version doesn't do that, so, we can keep it around too >>>>> + */ >>>>> + } >>>>> +} >>>>> #else >>>>> #define soc_camera_i2c_init(icd, sdesc) (-ENODEV) >>>>> #define soc_camera_i2c_free(icd) do {} while (0) >>>>> #define scan_async_host(ici) do {} while (0) >>>>> +#define scan_of_host(ici) do {} while (0) >>>>> #endif >>>>> >>>>> /* Called during host-driver probe */ >>>>> @@ -1689,6 +1877,7 @@ static int soc_camera_remove(struct soc_camera_device *icd) >>>>> { >>>>> struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); >>>>> struct video_device *vdev = icd->vdev; >>>>> + struct v4l2_of_endpoint *node = sdesc->host_desc.node; >>>>> >>>>> v4l2_ctrl_handler_free(&icd->ctrl_handler); >>>>> if (vdev) { >>>>> @@ -1719,6 +1908,17 @@ static int soc_camera_remove(struct soc_camera_device *icd) >>>>> if (icd->sasc) >>>>> platform_device_unregister(icd->sasc->pdev); >>>>> >>>>> + if (node) { >>>>> + struct soc_camera_of_client *sofc = container_of(node, >>>>> + struct soc_camera_of_client, node); >>>>> + /* Don't dead-lock: remove the device here under the lock */ >>>>> + clear_bit(sofc->sasc.pdev->id, device_map); >>>>> + list_del(&icd->list); >>>>> + if (sofc->link_node) >>>>> + of_node_put(sofc->link_node); >>>>> + platform_device_unregister(sofc->sasc.pdev); >>>>> + } >>>>> + Going back to the previous, in the use-case we have the device that we link to the soc_camera is /not/ an soc-camera, it is a standard v4l2 subdev device (adv7180).
On Fri, Mar 7, 2014 at 3:10 AM, Ben Dooks <ben.dooks@codethink.co.uk> wrote: > On 06/03/14 23:12, Bryan Wu wrote: >> >> On Mon, Feb 24, 2014 at 10:19 PM, Guennadi Liakhovetski >> <g.liakhovetski@gmx.de> wrote: >>> >>> Hi Bryan, >>> >>> On Mon, 24 Feb 2014, Bryan Wu wrote: >>> >>>> On Tue, Feb 18, 2014 at 10:40 AM, Bryan Wu <cooloney@gmail.com> wrote: >>>>> >>>>> On Wed, Feb 12, 2014 at 12:05 PM, Bryan Wu <cooloney@gmail.com> wrote: >>>>>> >>>>>> From: Guennadi Liakhovetski <g.liakhovetski@gmx.de> >>>>>> >>>>>> With OF we aren't getting platform data any more. To minimise changes >>>>>> we >>>>>> create all the missing data ourselves, including compulsory struct >>>>>> soc_camera_link objects. Host-client linking is now done, based on the >>>>>> OF >>>>>> data. Media bus numbers also have to be assigned dynamically. >>>>>> >>>>>> OF probing reuses the V4L2 Async API which is used by async non-OF >>>>>> probing. >>>>>> >>>>>> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> >>>>> >>>>> >>>>> Hi Guennadi, >>>>> >>>>> Do you have chance to review my v2 patch? >>> >>> >>> I looked at it briefly, the direction looks good now, but I'll have to >>> find time to properly review it. >>> >> >> Hi Guennadi, >> >> Do you have chance to review this patch? >> >> Thanks, >> -Bryan >> >> >>> >>>>>> Signed-off-by: Bryan Wu <pengw@nvidia.com> >>>>>> --- >>>>>> v2: >>>>>> - move to use V4L2 Async API >>>>>> - cleanup some coding style issue >>>>>> - allocate struct soc_camera_desc sdesc on stack >>>>>> - cleanup unbalanced mutex operation >>>>>> >>>>>> drivers/media/platform/soc_camera/soc_camera.c | 232 >>>>>> ++++++++++++++++++++++++- >>>>>> include/media/soc_camera.h | 5 + >>>>>> 2 files changed, 233 insertions(+), 4 deletions(-) >>>>>> >>>>>> diff --git a/drivers/media/platform/soc_camera/soc_camera.c >>>>>> b/drivers/media/platform/soc_camera/soc_camera.c >>>>>> index 4b8c024..ffe1254 100644 >>>>>> --- a/drivers/media/platform/soc_camera/soc_camera.c >>>>>> +++ b/drivers/media/platform/soc_camera/soc_camera.c >>>>>> @@ -23,6 +23,7 @@ >>>>>> #include <linux/list.h> >>>>>> #include <linux/module.h> >>>>>> #include <linux/mutex.h> >>>>>> +#include <linux/of.h> >>>>>> #include <linux/platform_device.h> >>>>>> #include <linux/pm_runtime.h> >>>>>> #include <linux/regulator/consumer.h> >>>>>> @@ -36,6 +37,7 @@ >>>>>> #include <media/v4l2-common.h> >>>>>> #include <media/v4l2-ioctl.h> >>>>>> #include <media/v4l2-dev.h> >>>>>> +#include <media/v4l2-of.h> >>>>>> #include <media/videobuf-core.h> >>>>>> #include <media/videobuf2-core.h> >>>>>> >>>>>> @@ -49,6 +51,7 @@ >>>>>> vb2_is_streaming(&(icd)->vb2_vidq)) >>>>>> >>>>>> #define MAP_MAX_NUM 32 >>>>>> +static DECLARE_BITMAP(host_map, MAP_MAX_NUM); >>>>>> static DECLARE_BITMAP(device_map, MAP_MAX_NUM); >>>>>> static LIST_HEAD(hosts); >>>>>> static LIST_HEAD(devices); >>>>>> @@ -65,6 +68,17 @@ struct soc_camera_async_client { >>>>>> struct list_head list; /* needed for clean up */ >>>>>> }; >>>>>> >>>>>> +struct soc_camera_of_client { >>>>>> + struct soc_camera_desc *sdesc; >>>>>> + struct soc_camera_async_client sasc; >>>>>> + struct v4l2_of_endpoint node; >>>>>> + struct dev_archdata archdata; >>>>>> + struct device_node *link_node; >>>>>> + union { >>>>>> + struct i2c_board_info i2c_info; >>>>>> + }; >>>>>> +}; > > > I don't understand why you need this for the async api case, since you > do not need to create any new i2c info. The i2c device should be probed > using OF and linked via the async probe api. > You're right, this i2c_info is useless in this case since soc_camera_i2c_init() will skip to use the .board_info. I can update the this patch to address this. Thanks. > I did a much simpler version of this that I was going to post today that > works with the renesas vin driver. > Could you please post it out? I can try it on my Tegra system. > >>>>>> + >>>>>> static int soc_camera_video_start(struct soc_camera_device *icd); >>>>>> static int video_dev_create(struct soc_camera_device *icd); >>>>>> >>>>>> @@ -1336,6 +1350,10 @@ static int soc_camera_i2c_init(struct >>>>>> soc_camera_device *icd, >>>>>> return -EPROBE_DEFER; >>>>>> } >>>>>> >>>>>> + /* OF probing skips following I2C init */ >>>>>> + if (shd->host_wait) >>>>>> + return 0; >>>>>> + >>>>>> ici = to_soc_camera_host(icd->parent); >>>>>> adap = i2c_get_adapter(shd->i2c_adapter_id); >>>>>> if (!adap) { >>>>>> @@ -1573,10 +1591,180 @@ static void scan_async_host(struct >>>>>> soc_camera_host *ici) >>>>>> asd += ici->asd_sizes[j]; >>>>>> } >>>>>> } >>>>>> + >>>>>> +static void soc_camera_of_i2c_ifill(struct soc_camera_of_client >>>>>> *sofc, >>>>>> + struct i2c_client *client) >>>>>> +{ >>>>>> + struct i2c_board_info *info = &sofc->i2c_info; >>>>>> + struct soc_camera_desc *sdesc = sofc->sdesc; >>>>>> + >>>>>> + /* on OF I2C devices platform_data == NULL */ >>>>>> + info->flags = client->flags; >>>>>> + info->addr = client->addr; >>>>>> + info->irq = client->irq; >>>>>> + info->archdata = &sofc->archdata; >>>>>> + >>>>>> + /* archdata is always empty on OF I2C devices */ >>>>>> + strlcpy(info->type, client->name, sizeof(info->type)); >>>>>> + >>>>>> + sdesc->host_desc.i2c_adapter_id = client->adapter->nr; >>>>>> +} >>>>>> + >>>>>> +static void soc_camera_of_i2c_info(struct device_node *node, >>>>>> + struct soc_camera_of_client *sofc) >>>>>> +{ >>>>>> + struct i2c_client *client; >>>>>> + struct soc_camera_desc *sdesc = sofc->sdesc; >>>>>> + struct i2c_board_info *info = &sofc->i2c_info; >>>>>> + struct device_node *port, *sensor, *bus; >>>>>> + >>>>>> + port = v4l2_of_get_remote_port(node); >>>>>> + if (!port) >>>>>> + return; >>>>>> + >>>>>> + /* Check the bus */ >>>>>> + sensor = of_get_parent(port); >>>>>> + bus = of_get_parent(sensor); >>>>>> + >>>>>> + if (of_node_cmp(bus->name, "i2c")) { >>>>>> + of_node_put(port); >>>>>> + of_node_put(sensor); >>>>>> + of_node_put(bus); >>>>>> + return; >>>>>> + } >>>>>> + >>>>>> + info->of_node = sensor; >>>>>> + sdesc->host_desc.board_info = info; >>>>>> + >>>>>> + client = of_find_i2c_device_by_node(sensor); >>>>>> + /* >>>>>> + * of_i2c_register_devices() took a reference to the OF node, >>>>>> it is not >>>>>> + * dropped, when the I2C device is removed, so, we don't need >>>>>> an >>>>>> + * additional reference. >>>>>> + */ >>>>>> + of_node_put(sensor); >>>>>> + if (client) { >>>>>> + soc_camera_of_i2c_ifill(sofc, client); >>>>>> + sofc->link_node = sensor; >>>>>> + put_device(&client->dev); >>>>>> + } >>>>>> + >>>>>> + /* client hasn't attached to I2C yet */ >>>>>> +} >>>>>> + >>>>>> +static struct soc_camera_of_client *soc_camera_of_alloc_client(const >>>>>> struct soc_camera_host *ici, >>>>>> + struct >>>>>> device_node *node) >>>>>> +{ >>>>>> + struct soc_camera_of_client *sofc; >>>>>> + struct v4l2_async_subdev *sensor; >>>>>> + struct soc_camera_desc sdesc = { .host_desc.host_wait = >>>>>> true,}; >>>>>> + int i, ret; >>>>>> + >>>>>> + sofc = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sofc), >>>>>> GFP_KERNEL); >>>>>> + if (!sofc) >>>>>> + return NULL; >>>>>> + >>>>>> + /* Allocate v4l2_async_subdev by ourselves */ >>>>>> + sensor = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sensor), >>>>>> GFP_KERNEL); >>>>>> + if (!sensor) >>>>>> + return NULL; >>>>>> + sofc->sasc.sensor = sensor; >>>>>> + >>>>>> + mutex_lock(&list_lock); >>>>>> + i = find_first_zero_bit(device_map, MAP_MAX_NUM); >>>>>> + if (i < MAP_MAX_NUM) >>>>>> + set_bit(i, device_map); >>>>>> + mutex_unlock(&list_lock); >>>>>> + if (i >= MAP_MAX_NUM) >>>>>> + return NULL; >>>>>> + sofc->sasc.pdev = platform_device_alloc("soc-camera-pdrv", i); >>>>>> + if (!sofc->sasc.pdev) >>>>>> + return NULL; >>>>>> + >>>>>> + sdesc.host_desc.node = &sofc->node; >>>>>> + sdesc.host_desc.bus_id = ici->nr; >>>>>> + >>>>>> + ret = platform_device_add_data(sofc->sasc.pdev, &sdesc, >>>>>> sizeof(sdesc)); >>>>>> + if (ret < 0) >>>>>> + return NULL; >>>>>> + sofc->sdesc = sofc->sasc.pdev->dev.platform_data; >>>>>> + >>>>>> + soc_camera_of_i2c_info(node, sofc); >>>>>> + >>>>>> + return sofc; >>>>>> +} >>>>>> + >>>>>> +static void scan_of_host(struct soc_camera_host *ici) >>>>>> +{ >>>>>> + struct soc_camera_of_client *sofc; >>>>>> + struct soc_camera_async_client *sasc; >>>>>> + struct v4l2_async_subdev *asd; >>>>>> + struct soc_camera_device *icd; >>>>>> + struct device_node *node = NULL; >>>>>> + >>>>>> + for (;;) { >>>>>> + int ret; >>>>>> + >>>>>> + node = >>>>>> v4l2_of_get_next_endpoint(ici->v4l2_dev.dev->of_node, >>>>>> + node); >>>>>> + if (!node) >>>>>> + break; >>>>>> + >>>>>> + sofc = soc_camera_of_alloc_client(ici, node); >>>>>> + if (!sofc) { >>>>>> + dev_err(ici->v4l2_dev.dev, >>>>>> + "%s(): failed to create a client >>>>>> device\n", >>>>>> + __func__); >>>>>> + of_node_put(node); >>>>>> + break; >>>>>> + } >>>>>> + v4l2_of_parse_endpoint(node, &sofc->node); >>>>>> + >>>>>> + sasc = &sofc->sasc; >>>>>> + ret = platform_device_add(sasc->pdev); >>>>>> + if (ret < 0) { >>>>>> + /* Useless thing, but keep trying */ >>>>>> + platform_device_put(sasc->pdev); >>>>>> + of_node_put(node); >>>>>> + continue; >>>>>> + } >>>>>> + >>>>>> + /* soc_camera_pdrv_probe() probed successfully */ >>>>>> + icd = platform_get_drvdata(sasc->pdev); >>>>>> + if (!icd) { >>>>>> + /* Cannot be... */ >>>>>> + platform_device_put(sasc->pdev); >>>>>> + of_node_put(node); >>>>>> + continue; >>>>>> + } >>>>>> + >>>>>> + asd = sasc->sensor; >>>>>> + asd->match_type = V4L2_ASYNC_MATCH_OF; >>>>>> + asd->match.of.node = sofc->link_node; >>>>>> + >>>>>> + sasc->notifier.subdevs = &asd; >>>>>> + sasc->notifier.num_subdevs = 1; >>>>>> + sasc->notifier.bound = soc_camera_async_bound; >>>>>> + sasc->notifier.unbind = soc_camera_async_unbind; >>>>>> + sasc->notifier.complete = soc_camera_async_complete; >>>>>> + >>>>>> + icd->parent = ici->v4l2_dev.dev; >>>>>> + >>>>>> + ret = v4l2_async_notifier_register(&ici->v4l2_dev, >>>>>> &sasc->notifier); >>>>>> + if (!ret) >>>>>> + sjUmBMDe3fq35HMObreak; >>>>>> + >>>>>> + /* >>>>>> + * We could destroy the icd in there error case here, >>>>>> but the >>>>>> + * non-OF version doesn't do that, so, we can keep it >>>>>> around too >>>>>> + */ >>>>>> + } >>>>>> +} >>>>>> #else >>>>>> #define soc_camera_i2c_init(icd, sdesc) (-ENODEV) >>>>>> #define soc_camera_i2c_free(icd) do {} while (0) >>>>>> #define scan_async_host(ici) do {} while (0) >>>>>> +#define scan_of_host(ici) do {} while (0) >>>>>> #endif >>>>>> >>>>>> /* Called during host-driver probe */ >>>>>> @@ -1689,6 +1877,7 @@ static int soc_camera_remove(struct >>>>>> soc_camera_device *icd) >>>>>> { >>>>>> struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); >>>>>> struct video_device *vdev = icd->vdev; >>>>>> + struct v4l2_of_endpoint *node = sdesc->host_desc.node; >>>>>> >>>>>> v4l2_ctrl_handler_free(&icd->ctrl_handler); >>>>>> if (vdev) { >>>>>> @@ -1719,6 +1908,17 @@ static int soc_camera_remove(struct >>>>>> soc_camera_device *icd) >>>>>> if (icd->sasc) >>>>>> platform_device_unregister(icd->sasc->pdev); >>>>>> >>>>>> + if (node) { >>>>>> + struct soc_camera_of_client *sofc = container_of(node, >>>>>> + struct soc_camera_of_client, >>>>>> node); >>>>>> + /* Don't dead-lock: remove the device here under the >>>>>> lock */ >>>>>> + clear_bit(sofc->sasc.pdev->id, device_map); >>>>>> + list_del(&icd->list); >>>>>> + if (sofc->link_node) >>>>>> + of_node_put(sofc->link_node); >>>>>> + platform_device_unregister(sofc->sasc.pdev); >>>>>> + } >>>>>> + > > > Going back to the previous, in the use-case we have the device that > we link to the soc_camera is /not/ an soc-camera, it is a standard > v4l2 subdev device (adv7180). > Sure, I think it should be fine for both soc-camera device and a standard v4l2 subdev device. Thanks, -Bryan -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi, Brayn Sorry for the format of my email. I subscribe the linux-media maillist but I didn't find your email in my mailbox even. I don't know why some emails are missed. anyway, Some comments for your patch. > [snip] > ... ... > +static void scan_of_host(struct soc_camera_host *ici) > +{ > + struct soc_camera_of_client *sofc; > + struct soc_camera_async_client *sasc; > + struct v4l2_async_subdev *asd; > + struct soc_camera_device *icd; > + struct device_node *node = NULL; > + > + for (;;) { > + int ret; > + > + node = v4l2_of_get_next_endpoint(ici->v4l2_dev.dev->of_node, > + node); > + if (!node) > + break; > + > + sofc = soc_camera_of_alloc_client(ici, node); > + if (!sofc) { > + dev_err(ici->v4l2_dev.dev, > + "%s(): failed to create a client device\n", > + __func__); > + of_node_put(node); > + break; > + } > + v4l2_of_parse_endpoint(node, &sofc->node); > + > + sasc = &sofc->sasc; > + ret = platform_device_add(sasc->pdev); > + if (ret < 0) { > + /* Useless thing, but keep trying */ > + platform_device_put(sasc->pdev); > + of_node_put(node); > + continue; > + } > + > + /* soc_camera_pdrv_probe() probed successfully */ > + icd = platform_get_drvdata(sasc->pdev); > + if (!icd) { > + /* Cannot be... */ > + platform_device_put(sasc->pdev); > + of_node_put(node); > + continue; > + } > + > + asd = sasc->sensor; > + asd->match_type = V4L2_ASYNC_MATCH_OF; > + asd->match.of.node = sofc->link_node; > + > + sasc->notifier.subdevs = &asd; > + sasc->notifier.num_subdevs = 1; > + sasc->notifier.bound = soc_camera_async_bound; > + sasc->notifier.unbind = soc_camera_async_unbind; > + sasc->notifier.complete = soc_camera_async_complete; > + > + icd->parent = ici->v4l2_dev.dev; Before register the notifier, you need also register a "mclk" v4l2 clock. This clock is needed when the soc-camera i2c sensor driver is probed. Otherwise the sensor will always defer the probe and can not probe. Best Regards, Josh Wu > + > + ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); > + if (!ret) > + break; > + > + /* > + * We could destroy the icd in there error case here, but the > + * non-OF version doesn't do that, so, we can keep it around too > + */ > + } > +} > [snip] -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Thanks Josh, I think I will take you point and rework my patch again. But I need Guennadi's review firstly, Guennadi, could you please help to review it? -Bryan On Fri, Mar 14, 2014 at 3:48 AM, Josh Wu <josh.wu@atmel.com> wrote: > Hi, Brayn > > Sorry for the format of my email. I subscribe the linux-media maillist but > I didn't find your email in my mailbox even. I don't know why some emails are > missed. > > anyway, Some comments for your patch. > >> [snip] > >> ... ... > >> +static void scan_of_host(struct soc_camera_host *ici) >> +{ >> + struct soc_camera_of_client *sofc; >> + struct soc_camera_async_client *sasc; >> + struct v4l2_async_subdev *asd; >> + struct soc_camera_device *icd; >> + struct device_node *node = NULL; >> + >> + for (;;) { >> + int ret; >> + >> + node = v4l2_of_get_next_endpoint(ici->v4l2_dev.dev->of_node, >> + node); >> + if (!node) >> + break; >> + >> + sofc = soc_camera_of_alloc_client(ici, node); >> + if (!sofc) { >> + dev_err(ici->v4l2_dev.dev, >> + "%s(): failed to create a client device\n", >> + __func__); >> + of_node_put(node); >> + break; >> + } >> + v4l2_of_parse_endpoint(node, &sofc->node); >> + >> + sasc = &sofc->sasc; >> + ret = platform_device_add(sasc->pdev); >> + if (ret < 0) { >> + /* Useless thing, but keep trying */ >> + platform_device_put(sasc->pdev); >> + of_node_put(node); >> + continue; >> + } >> + >> + /* soc_camera_pdrv_probe() probed successfully */ >> + icd = platform_get_drvdata(sasc->pdev); >> + if (!icd) { >> + /* Cannot be... */ >> + platform_device_put(sasc->pdev); >> + of_node_put(node); >> + continue; >> + } >> + >> + asd = sasc->sensor; >> + asd->match_type = V4L2_ASYNC_MATCH_OF; >> + asd->match.of.node = sofc->link_node; >> + >> + sasc->notifier.subdevs = &asd; >> + sasc->notifier.num_subdevs = 1; >> + sasc->notifier.bound = soc_camera_async_bound; >> + sasc->notifier.unbind = soc_camera_async_unbind; >> + sasc->notifier.complete = soc_camera_async_complete; >> + >> + icd->parent = ici->v4l2_dev.dev; > > Before register the notifier, you need also register a "mclk" v4l2 clock. > This clock is needed when the soc-camera i2c sensor driver is probed. Otherwise the > sensor will always defer the probe and can not probe. > > Best Regards, > Josh Wu > >> + >> + ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); >> + if (!ret) >> + break; >> + >> + /* >> + * We could destroy the icd in there error case here, but the >> + * non-OF version doesn't do that, so, we can keep it around too >> + */ >> + } >> +} > >> [snip] -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Bryan, On Tue, 8 Apr 2014, Bryan Wu wrote: > Thanks Josh, I think I will take you point and rework my patch again. > But I need Guennadi's review firstly, Guennadi, could you please help > to review it? Ok, let me double check the situation: 1. We've got this patch from you, aiming at adding OF probing support to soc-camra 2. We've got an alternative patch from Ben to do the same, his last reply to a comment to his patch was "Thanks, I will look into this." 3. We've got Ben's patches for rcar-vin, that presumably work with his patch from (2) above 4. We've got Josh's patches to add OF / async probing to atmel-isi and ov2640, that are not known to work with either (1) or (2) above, so, they don't work at all, right? So, to summarise, there is a core patch from Ben, that he possibly wants to adjust, and that works with his rcar-vin OF, there is a patch from you that isn't known to work with any driver, and there are patches from Josh, that don't work, because there isn't a suitable patch available for them. I will have a look at your and Ben's soc-camera OF patches to compare them and compare them with my early code (hopefully this coming weekend), but so far it looks like only Ben's solution has a complete working stack. Am I missing something? Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/ -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi, Guennadi On 4/11/2014 5:18 AM, Guennadi Liakhovetski wrote: > Hi Bryan, > > On Tue, 8 Apr 2014, Bryan Wu wrote: > >> Thanks Josh, I think I will take you point and rework my patch again. >> But I need Guennadi's review firstly, Guennadi, could you please help >> to review it? > Ok, let me double check the situation: > > 1. We've got this patch from you, aiming at adding OF probing support to > soc-camra > > 2. We've got an alternative patch from Ben to do the same, his last reply > to a comment to his patch was "Thanks, I will look into this." > > 3. We've got Ben's patches for rcar-vin, that presumably work with his > patch from (2) above > > 4. We've got Josh's patches to add OF / async probing to atmel-isi and > ov2640, that are not known to work with either (1) or (2) above, so, they > don't work at all, right? Right, the atmel-isi dt cannot work in those two patches unless the mclk stuff is added or adjusted. > > So, to summarise, there is a core patch from Ben, that he possibly wants > to adjust, and that works with his rcar-vin OF, there is a patch from you > that isn't known to work with any driver, and there are patches from Josh, > that don't work, because there isn't a suitable patch available for them. > I will have a look at your and Ben's soc-camera OF patches to compare them > and compare them with my early code (hopefully this coming weekend), but > so far it looks like only Ben's solution has a complete working stack. Am > I missing something? > > Thanks > Guennadi > --- > Guennadi Liakhovetski, Ph.D. > Freelance Open-Source Software Developer > http://www.open-technology.de/ Best Regards, Josh Wu -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 10/04/14 22:18, Guennadi Liakhovetski wrote: > Hi Bryan, > > On Tue, 8 Apr 2014, Bryan Wu wrote: > >> Thanks Josh, I think I will take you point and rework my patch again. >> But I need Guennadi's review firstly, Guennadi, could you please help >> to review it? > > Ok, let me double check the situation: > > 1. We've got this patch from you, aiming at adding OF probing support to > soc-camra > > 2. We've got an alternative patch from Ben to do the same, his last reply > to a comment to his patch was "Thanks, I will look into this." > > 3. We've got Ben's patches for rcar-vin, that presumably work with his > patch from (2) above > > 4. We've got Josh's patches to add OF / async probing to atmel-isi and > ov2640, that are not known to work with either (1) or (2) above, so, they > don't work at all, right? > > So, to summarise, there is a core patch from Ben, that he possibly wants > to adjust, and that works with his rcar-vin OF, there is a patch from you > that isn't known to work with any driver, and there are patches from Josh, > that don't work, because there isn't a suitable patch available for them. > I will have a look at your and Ben's soc-camera OF patches to compare them > and compare them with my early code (hopefully this coming weekend), but > so far it looks like only Ben's solution has a complete working stack. Am > I missing something? I am looking in to fix the comments from Josh to get the atmel to work and hope to have them out this weekend.
On Thu, Apr 10, 2014 at 2:18 PM, Guennadi Liakhovetski <g.liakhovetski@gmx.de> wrote: > Hi Bryan, > > On Tue, 8 Apr 2014, Bryan Wu wrote: > >> Thanks Josh, I think I will take you point and rework my patch again. >> But I need Guennadi's review firstly, Guennadi, could you please help >> to review it? > > Ok, let me double check the situation: > > 1. We've got this patch from you, aiming at adding OF probing support to > soc-camra > > 2. We've got an alternative patch from Ben to do the same, his last reply > to a comment to his patch was "Thanks, I will look into this." > > 3. We've got Ben's patches for rcar-vin, that presumably work with his > patch from (2) above > > 4. We've got Josh's patches to add OF / async probing to atmel-isi and > ov2640, that are not known to work with either (1) or (2) above, so, they > don't work at all, right? > > So, to summarise, there is a core patch from Ben, that he possibly wants > to adjust, and that works with his rcar-vin OF, there is a patch from you > that isn't known to work with any driver, and there are patches from Josh, > that don't work, because there isn't a suitable patch available for them. > I will have a look at your and Ben's soc-camera OF patches to compare them > and compare them with my early code (hopefully this coming weekend), but > so far it looks like only Ben's solution has a complete working stack. Am > I missing something? > My bad. I missed the conversation and patches from Ben Dooks and you guys. I have no problem for merging Ben's patch and I will align my Tegra Camera patch with that, probably posted later. Thanks, -Bryan -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 14/04/14 18:14, Bryan Wu wrote: > On Thu, Apr 10, 2014 at 2:18 PM, Guennadi Liakhovetski > <g.liakhovetski@gmx.de> wrote: >> Hi Bryan, >> >> On Tue, 8 Apr 2014, Bryan Wu wrote: >> >>> Thanks Josh, I think I will take you point and rework my patch again. >>> But I need Guennadi's review firstly, Guennadi, could you please help >>> to review it? >> >> Ok, let me double check the situation: >> >> 1. We've got this patch from you, aiming at adding OF probing support to >> soc-camra >> >> 2. We've got an alternative patch from Ben to do the same, his last reply >> to a comment to his patch was "Thanks, I will look into this." >> >> 3. We've got Ben's patches for rcar-vin, that presumably work with his >> patch from (2) above >> >> 4. We've got Josh's patches to add OF / async probing to atmel-isi and >> ov2640, that are not known to work with either (1) or (2) above, so, they >> don't work at all, right? >> >> So, to summarise, there is a core patch from Ben, that he possibly wants >> to adjust, and that works with his rcar-vin OF, there is a patch from you >> that isn't known to work with any driver, and there are patches from Josh, >> that don't work, because there isn't a suitable patch available for them. >> I will have a look at your and Ben's soc-camera OF patches to compare them >> and compare them with my early code (hopefully this coming weekend), but >> so far it looks like only Ben's solution has a complete working stack. Am >> I missing something? >> > > My bad. I missed the conversation and patches from Ben Dooks and you guys. > I have no problem for merging Ben's patch and I will align my Tegra > Camera patch with that, probably posted later. If possible, could you test the latest one? I've not had much time to actually use this and would welcome some feedback.
On Mon, Apr 14, 2014 at 10:38 AM, Ben Dooks <ben.dooks@codethink.co.uk> wrote: > On 14/04/14 18:14, Bryan Wu wrote: >> >> On Thu, Apr 10, 2014 at 2:18 PM, Guennadi Liakhovetski >> <g.liakhovetski@gmx.de> wrote: >>> >>> Hi Bryan, >>> >>> On Tue, 8 Apr 2014, Bryan Wu wrote: >>> >>>> Thanks Josh, I think I will take you point and rework my patch again. >>>> But I need Guennadi's review firstly, Guennadi, could you please help >>>> to review it? >>> >>> >>> Ok, let me double check the situation: >>> >>> 1. We've got this patch from you, aiming at adding OF probing support to >>> soc-camra >>> >>> 2. We've got an alternative patch from Ben to do the same, his last reply >>> to a comment to his patch was "Thanks, I will look into this." >>> >>> 3. We've got Ben's patches for rcar-vin, that presumably work with his >>> patch from (2) above >>> >>> 4. We've got Josh's patches to add OF / async probing to atmel-isi and >>> ov2640, that are not known to work with either (1) or (2) above, so, they >>> don't work at all, right? >>> >>> So, to summarise, there is a core patch from Ben, that he possibly wants >>> to adjust, and that works with his rcar-vin OF, there is a patch from you >>> that isn't known to work with any driver, and there are patches from >>> Josh, >>> that don't work, because there isn't a suitable patch available for them. >>> I will have a look at your and Ben's soc-camera OF patches to compare >>> them >>> and compare them with my early code (hopefully this coming weekend), but >>> so far it looks like only Ben's solution has a complete working stack. Am >>> I missing something? >>> >> >> My bad. I missed the conversation and patches from Ben Dooks and you guys. >> I have no problem for merging Ben's patch and I will align my Tegra >> Camera patch with that, probably posted later. > > > If possible, could you test the latest one? I've not had much time > to actually use this and would welcome some feedback. > I'm busy about other stuff, but after I finish that, I definitely try to port my driver on top of you patchset. Thanks a lot, -Bryan -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c index 4b8c024..ffe1254 100644 --- a/drivers/media/platform/soc_camera/soc_camera.c +++ b/drivers/media/platform/soc_camera/soc_camera.c @@ -23,6 +23,7 @@ #include <linux/list.h> #include <linux/module.h> #include <linux/mutex.h> +#include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/regulator/consumer.h> @@ -36,6 +37,7 @@ #include <media/v4l2-common.h> #include <media/v4l2-ioctl.h> #include <media/v4l2-dev.h> +#include <media/v4l2-of.h> #include <media/videobuf-core.h> #include <media/videobuf2-core.h> @@ -49,6 +51,7 @@ vb2_is_streaming(&(icd)->vb2_vidq)) #define MAP_MAX_NUM 32 +static DECLARE_BITMAP(host_map, MAP_MAX_NUM); static DECLARE_BITMAP(device_map, MAP_MAX_NUM); static LIST_HEAD(hosts); static LIST_HEAD(devices); @@ -65,6 +68,17 @@ struct soc_camera_async_client { struct list_head list; /* needed for clean up */ }; +struct soc_camera_of_client { + struct soc_camera_desc *sdesc; + struct soc_camera_async_client sasc; + struct v4l2_of_endpoint node; + struct dev_archdata archdata; + struct device_node *link_node; + union { + struct i2c_board_info i2c_info; + }; +}; + static int soc_camera_video_start(struct soc_camera_device *icd); static int video_dev_create(struct soc_camera_device *icd); @@ -1336,6 +1350,10 @@ static int soc_camera_i2c_init(struct soc_camera_device *icd, return -EPROBE_DEFER; } + /* OF probing skips following I2C init */ + if (shd->host_wait) + return 0; + ici = to_soc_camera_host(icd->parent); adap = i2c_get_adapter(shd->i2c_adapter_id); if (!adap) { @@ -1573,10 +1591,180 @@ static void scan_async_host(struct soc_camera_host *ici) asd += ici->asd_sizes[j]; } } + +static void soc_camera_of_i2c_ifill(struct soc_camera_of_client *sofc, + struct i2c_client *client) +{ + struct i2c_board_info *info = &sofc->i2c_info; + struct soc_camera_desc *sdesc = sofc->sdesc; + + /* on OF I2C devices platform_data == NULL */ + info->flags = client->flags; + info->addr = client->addr; + info->irq = client->irq; + info->archdata = &sofc->archdata; + + /* archdata is always empty on OF I2C devices */ + strlcpy(info->type, client->name, sizeof(info->type)); + + sdesc->host_desc.i2c_adapter_id = client->adapter->nr; +} + +static void soc_camera_of_i2c_info(struct device_node *node, + struct soc_camera_of_client *sofc) +{ + struct i2c_client *client; + struct soc_camera_desc *sdesc = sofc->sdesc; + struct i2c_board_info *info = &sofc->i2c_info; + struct device_node *port, *sensor, *bus; + + port = v4l2_of_get_remote_port(node); + if (!port) + return; + + /* Check the bus */ + sensor = of_get_parent(port); + bus = of_get_parent(sensor); + + if (of_node_cmp(bus->name, "i2c")) { + of_node_put(port); + of_node_put(sensor); + of_node_put(bus); + return; + } + + info->of_node = sensor; + sdesc->host_desc.board_info = info; + + client = of_find_i2c_device_by_node(sensor); + /* + * of_i2c_register_devices() took a reference to the OF node, it is not + * dropped, when the I2C device is removed, so, we don't need an + * additional reference. + */ + of_node_put(sensor); + if (client) { + soc_camera_of_i2c_ifill(sofc, client); + sofc->link_node = sensor; + put_device(&client->dev); + } + + /* client hasn't attached to I2C yet */ +} + +static struct soc_camera_of_client *soc_camera_of_alloc_client(const struct soc_camera_host *ici, + struct device_node *node) +{ + struct soc_camera_of_client *sofc; + struct v4l2_async_subdev *sensor; + struct soc_camera_desc sdesc = { .host_desc.host_wait = true,}; + int i, ret; + + sofc = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sofc), GFP_KERNEL); + if (!sofc) + return NULL; + + /* Allocate v4l2_async_subdev by ourselves */ + sensor = devm_kzalloc(ici->v4l2_dev.dev, sizeof(*sensor), GFP_KERNEL); + if (!sensor) + return NULL; + sofc->sasc.sensor = sensor; + + mutex_lock(&list_lock); + i = find_first_zero_bit(device_map, MAP_MAX_NUM); + if (i < MAP_MAX_NUM) + set_bit(i, device_map); + mutex_unlock(&list_lock); + if (i >= MAP_MAX_NUM) + return NULL; + sofc->sasc.pdev = platform_device_alloc("soc-camera-pdrv", i); + if (!sofc->sasc.pdev) + return NULL; + + sdesc.host_desc.node = &sofc->node; + sdesc.host_desc.bus_id = ici->nr; + + ret = platform_device_add_data(sofc->sasc.pdev, &sdesc, sizeof(sdesc)); + if (ret < 0) + return NULL; + sofc->sdesc = sofc->sasc.pdev->dev.platform_data; + + soc_camera_of_i2c_info(node, sofc); + + return sofc; +} + +static void scan_of_host(struct soc_camera_host *ici) +{ + struct soc_camera_of_client *sofc; + struct soc_camera_async_client *sasc; + struct v4l2_async_subdev *asd; + struct soc_camera_device *icd; + struct device_node *node = NULL; + + for (;;) { + int ret; + + node = v4l2_of_get_next_endpoint(ici->v4l2_dev.dev->of_node, + node); + if (!node) + break; + + sofc = soc_camera_of_alloc_client(ici, node); + if (!sofc) { + dev_err(ici->v4l2_dev.dev, + "%s(): failed to create a client device\n", + __func__); + of_node_put(node); + break; + } + v4l2_of_parse_endpoint(node, &sofc->node); + + sasc = &sofc->sasc; + ret = platform_device_add(sasc->pdev); + if (ret < 0) { + /* Useless thing, but keep trying */ + platform_device_put(sasc->pdev); + of_node_put(node); + continue; + } + + /* soc_camera_pdrv_probe() probed successfully */ + icd = platform_get_drvdata(sasc->pdev); + if (!icd) { + /* Cannot be... */ + platform_device_put(sasc->pdev); + of_node_put(node); + continue; + } + + asd = sasc->sensor; + asd->match_type = V4L2_ASYNC_MATCH_OF; + asd->match.of.node = sofc->link_node; + + sasc->notifier.subdevs = &asd; + sasc->notifier.num_subdevs = 1; + sasc->notifier.bound = soc_camera_async_bound; + sasc->notifier.unbind = soc_camera_async_unbind; + sasc->notifier.complete = soc_camera_async_complete; + + icd->parent = ici->v4l2_dev.dev; + + ret = v4l2_async_notifier_register(&ici->v4l2_dev, &sasc->notifier); + if (!ret) + break; + + /* + * We could destroy the icd in there error case here, but the + * non-OF version doesn't do that, so, we can keep it around too + */ + } +} #else #define soc_camera_i2c_init(icd, sdesc) (-ENODEV) #define soc_camera_i2c_free(icd) do {} while (0) #define scan_async_host(ici) do {} while (0) +#define scan_of_host(ici) do {} while (0) #endif /* Called during host-driver probe */ @@ -1689,6 +1877,7 @@ static int soc_camera_remove(struct soc_camera_device *icd) { struct soc_camera_desc *sdesc = to_soc_camera_desc(icd); struct video_device *vdev = icd->vdev; + struct v4l2_of_endpoint *node = sdesc->host_desc.node; v4l2_ctrl_handler_free(&icd->ctrl_handler); if (vdev) { @@ -1719,6 +1908,17 @@ static int soc_camera_remove(struct soc_camera_device *icd) if (icd->sasc) platform_device_unregister(icd->sasc->pdev); + if (node) { + struct soc_camera_of_client *sofc = container_of(node, + struct soc_camera_of_client, node); + /* Don't dead-lock: remove the device here under the lock */ + clear_bit(sofc->sasc.pdev->id, device_map); + list_del(&icd->list); + if (sofc->link_node) + of_node_put(sofc->link_node); + platform_device_unregister(sofc->sasc.pdev); + } + return 0; } @@ -1813,17 +2013,34 @@ int soc_camera_host_register(struct soc_camera_host *ici) ici->ops->enum_framesizes = default_enum_framesizes; mutex_lock(&list_lock); - list_for_each_entry(ix, &hosts, list) { - if (ix->nr == ici->nr) { + if (ici->nr == (unsigned char)-1) { + /* E.g. OF host: dynamic number */ + /* TODO: consider using IDR */ + ici->nr = find_first_zero_bit(host_map, MAP_MAX_NUM); + if (ici->nr >= MAP_MAX_NUM) { ret = -EBUSY; goto edevreg; } + } else { + if (ici->nr >= MAP_MAX_NUM) { + ret = -EINVAL; + goto edevreg; + } + + list_for_each_entry(ix, &hosts, list) { + if (ix->nr == ici->nr) { + ret = -EBUSY; + goto edevreg; + } + } } ret = v4l2_device_register(ici->v4l2_dev.dev, &ici->v4l2_dev); if (ret < 0) goto edevreg; + set_bit(ici->nr, host_map); + list_add_tail(&ici->list, &hosts); mutex_unlock(&list_lock); @@ -1837,9 +2054,11 @@ int soc_camera_host_register(struct soc_camera_host *ici) * dynamically! */ scan_async_host(ici); - else + else if (!ici->v4l2_dev.dev->of_node) /* Legacy: static platform devices from board data */ scan_add_host(ici); + else /* Scan subdevices from OF info */ + scan_of_host(ici); return 0; @@ -1857,6 +2076,8 @@ void soc_camera_host_unregister(struct soc_camera_host *ici) LIST_HEAD(notifiers); mutex_lock(&list_lock); + + clear_bit(ici->nr, host_map); list_del(&ici->list); list_for_each_entry(icd, &devices, list) if (icd->iface == ici->nr && icd->sasc) { @@ -1875,7 +2096,10 @@ void soc_camera_host_unregister(struct soc_camera_host *ici) mutex_lock(&list_lock); list_for_each_entry_safe(icd, tmp, &devices, list) - if (icd->iface == ici->nr) + if (icd->iface == ici->nr && + icd->parent == ici->v4l2_dev.dev && + (to_soc_camera_control(icd) || + icd->sdesc->host_desc.host_wait)) soc_camera_remove(icd); mutex_unlock(&list_lock); diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h index 865246b..06b03b1 100644 --- a/include/media/soc_camera.h +++ b/include/media/soc_camera.h @@ -138,6 +138,7 @@ struct soc_camera_host_ops { struct i2c_board_info; struct regulator_bulk_data; +struct v4l2_of_endpoint; struct soc_camera_subdev_desc { /* Per camera SOCAM_SENSOR_* bus flags */ @@ -177,7 +178,9 @@ struct soc_camera_host_desc { int bus_id; int i2c_adapter_id; struct i2c_board_info *board_info; + struct v4l2_of_endpoint *node; const char *module_name; + bool host_wait; /* * For non-I2C devices platform has to provide methods to add a device @@ -242,7 +245,9 @@ struct soc_camera_link { int bus_id; int i2c_adapter_id; struct i2c_board_info *board_info; + struct v4l2_of_endpoint *node; const char *module_name; + bool host_wait; /* * For non-I2C devices platform has to provide methods to add a device