| Message ID | 1430316005-16480-9-git-send-email-shobhit.kumar@intel.com |
|---|---|
| State | New |
| Headers | show |
On Wed, 29 Apr 2015, Shobhit Kumar <shobhit.kumar@intel.com> wrote: > Use the CRC PWM device in intel_panel.c and add new MIPI backlight > specififc callbacks > > v2: Modify to use pwm_config callback > > CC: Samuel Ortiz <sameo@linux.intel.com> > Cc: Linus Walleij <linus.walleij@linaro.org> > Cc: Alexandre Courbot <gnurou@gmail.com> > Cc: Thierry Reding <thierry.reding@gmail.com> > Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com> > --- > drivers/gpu/drm/i915/intel_drv.h | 5 +++ > drivers/gpu/drm/i915/intel_dsi.c | 6 +++ > drivers/gpu/drm/i915/intel_panel.c | 92 +++++++++++++++++++++++++++++++++++--- > 3 files changed, 98 insertions(+), 5 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h > index 897f17d..b4ebe3b 100644 > --- a/drivers/gpu/drm/i915/intel_drv.h > +++ b/drivers/gpu/drm/i915/intel_drv.h > @@ -182,7 +182,12 @@ struct intel_panel { > bool enabled; > bool combination_mode; /* gen 2/4 only */ > bool active_low_pwm; > + > + /* PWM chip */ > + struct pwm_device *pwm; > + > struct backlight_device *device; > + Superfluous whitespace. > } backlight; > > void (*backlight_power)(struct intel_connector *, bool enable); > diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c > index be55ffa..83c4540 100644 > --- a/drivers/gpu/drm/i915/intel_dsi.c > +++ b/drivers/gpu/drm/i915/intel_dsi.c > @@ -402,6 +402,8 @@ static void intel_dsi_enable(struct intel_encoder *encoder) > > intel_dsi_port_enable(encoder); > } > + > + intel_panel_enable_backlight(intel_dsi->attached_connector); > } > > static void intel_dsi_pre_enable(struct intel_encoder *encoder) > @@ -466,6 +468,8 @@ static void intel_dsi_pre_disable(struct intel_encoder *encoder) > > DRM_DEBUG_KMS("\n"); > > + intel_panel_disable_backlight(intel_dsi->attached_connector); > + > if (is_vid_mode(intel_dsi)) { > /* Send Shutdown command to the panel in LP mode */ > for_each_dsi_port(port, intel_dsi->ports) > @@ -1132,6 +1136,8 @@ void intel_dsi_init(struct drm_device *dev) > } > > intel_panel_init(&intel_connector->panel, fixed_mode, NULL); > + intel_panel_setup_backlight(connector, > + (intel_encoder->crtc_mask = (1 << PIPE_A)) ? PIPE_A: PIPE_B); > > return; > > diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c > index 08532d4..5700f6f 100644 > --- a/drivers/gpu/drm/i915/intel_panel.c > +++ b/drivers/gpu/drm/i915/intel_panel.c > @@ -32,8 +32,12 @@ > > #include <linux/kernel.h> > #include <linux/moduleparam.h> > +#include <linux/pwm.h> > #include "intel_drv.h" > > +#define CRC_PMIC_PWM_PERIOD_NS 21333 > +#define CRC_PMIC_PWM_STEPS 255 > + > void > intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode, > struct drm_display_mode *adjusted_mode) > @@ -536,6 +540,15 @@ static u32 vlv_get_backlight(struct intel_connector *connector) > return _vlv_get_backlight(dev, pipe); > } > > +static u32 vlv_get_mipi_backlight(struct intel_connector *connector) I'd rather call this either pmic_get_backlight or even pwm_get_backlight because there's nothing really vlv specific about the functions themselves. Same for all of them. > +{ > + struct intel_panel *panel = &connector->panel; > + int duty_ns; > + > + duty_ns = pwm_get_duty_cycle(panel->backlight.pwm); > + return DIV_ROUND_UP(duty_ns * 100, CRC_PMIC_PWM_PERIOD_NS); Basically we have all the code in place to do the scaling from hw to user. See the note in intel_backlight_device_register. We shouldn't need to add additional scaling all around. However this can be a future cleanup IMO. > +} > + > static u32 intel_panel_get_backlight(struct intel_connector *connector) > { > struct drm_device *dev = connector->base.dev; > @@ -616,6 +629,14 @@ static void vlv_set_backlight(struct intel_connector *connector, u32 level) > I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level); > } > > +static void vlv_set_mipi_backlight(struct intel_connector *connector, u32 level) > +{ > + struct intel_panel *panel = &connector->panel; > + int duty_ns = DIV_ROUND_UP(level * CRC_PMIC_PWM_PERIOD_NS, 100); > + > + pwm_config(panel->backlight.pwm, duty_ns, CRC_PMIC_PWM_PERIOD_NS); > +} > + > static void > intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level) > { > @@ -741,6 +762,16 @@ static void vlv_disable_backlight(struct intel_connector *connector) > I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE); > } > > +static void vlv_disable_mipi_backlight(struct intel_connector *connector) > +{ > + struct intel_panel *panel = &connector->panel; > + > + /* Disable the backlight */ > + pwm_config(panel->backlight.pwm, 0, CRC_PMIC_PWM_PERIOD_NS); > + usleep_range(2000, 3000); > + pwm_disable(panel->backlight.pwm); > +} > + > void intel_panel_disable_backlight(struct intel_connector *connector) > { > struct drm_device *dev = connector->base.dev; > @@ -947,6 +978,16 @@ static void vlv_enable_backlight(struct intel_connector *connector) > I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE); > } > > +static void vlv_enable_mipi_backlight(struct intel_connector *connector) > +{ > + struct intel_panel *panel = &connector->panel; > + int duty_ns = DIV_ROUND_UP( > + panel->backlight.level * CRC_PMIC_PWM_PERIOD_NS, 100); > + > + pwm_enable(panel->backlight.pwm); > + pwm_config(panel->backlight.pwm, duty_ns, CRC_PMIC_PWM_PERIOD_NS); All other enable functions call intel_panel_actually_set_backlight(connector, panel->backlight.level); to do this. It'll give you logging too. > +} > + > void intel_panel_enable_backlight(struct intel_connector *connector) > { > struct drm_device *dev = connector->base.dev; > @@ -1299,6 +1340,34 @@ static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe > return 0; > } > > +static int vlv_setup_mipi_backlight(struct intel_connector *connector, enum pipe pipe) > +{ > + struct drm_device *dev = connector->base.dev; > + struct intel_panel *panel = &connector->panel; > + > + /* Get the PWM chip for backlight control */ > + panel->backlight.pwm = pwm_get(dev->dev, "pwm_backlight"); > + if (IS_ERR(panel->backlight.pwm)) { > + DRM_ERROR("Faild to own the pwm chip\n"); > + panel->backlight.pwm = NULL; I think you want to return -ENODEV here. And then you can drop the "else" below and make that a normal if. > + } else if (pwm_config(panel->backlight.pwm, CRC_PMIC_PWM_PERIOD_NS, > + CRC_PMIC_PWM_PERIOD_NS) < 0) { > + DRM_ERROR("Failed to configure the pwm chip\n"); > + pwm_put(panel->backlight.pwm); > + panel->backlight.pwm = NULL; > + return -1; Save whatever pwm_config returns and return that instead of -1. > + } > + > + panel->backlight.min = 0; /* 0% */ > + panel->backlight.max = 100; /* 100% */ > + panel->backlight.level = DIV_ROUND_UP( > + pwm_get_duty_cycle(panel->backlight.pwm) * 100, > + CRC_PMIC_PWM_PERIOD_NS); > + panel->backlight.enabled = panel->backlight.level ? true : false; panel->backlight.level != 0 > + > + return 0; > +} > + > int intel_panel_setup_backlight(struct drm_connector *connector, enum pipe pipe) > { > struct drm_device *dev = connector->dev; > @@ -1363,11 +1432,19 @@ void intel_panel_init_backlight_funcs(struct drm_device *dev) > dev_priv->display.set_backlight = pch_set_backlight; > dev_priv->display.get_backlight = pch_get_backlight; > } else if (IS_VALLEYVIEW(dev)) { > - dev_priv->display.setup_backlight = vlv_setup_backlight; > - dev_priv->display.enable_backlight = vlv_enable_backlight; > - dev_priv->display.disable_backlight = vlv_disable_backlight; > - dev_priv->display.set_backlight = vlv_set_backlight; > - dev_priv->display.get_backlight = vlv_get_backlight; > + if (dev_priv->vbt.has_mipi) { > + dev_priv->display.setup_backlight = vlv_setup_mipi_backlight; > + dev_priv->display.enable_backlight = vlv_enable_mipi_backlight; > + dev_priv->display.disable_backlight = vlv_disable_mipi_backlight; > + dev_priv->display.set_backlight = vlv_set_mipi_backlight; > + dev_priv->display.get_backlight = vlv_get_mipi_backlight; > + } else { > + dev_priv->display.setup_backlight = vlv_setup_backlight; > + dev_priv->display.enable_backlight = vlv_enable_backlight; > + dev_priv->display.disable_backlight = vlv_disable_backlight; > + dev_priv->display.set_backlight = vlv_set_backlight; > + dev_priv->display.get_backlight = vlv_get_backlight; > + } > } else if (IS_GEN4(dev)) { > dev_priv->display.setup_backlight = i965_setup_backlight; > dev_priv->display.enable_backlight = i965_enable_backlight; > @@ -1404,6 +1481,11 @@ void intel_panel_fini(struct intel_panel *panel) > if (panel->downclock_mode) > drm_mode_destroy(intel_connector->base.dev, > panel->downclock_mode); > + > + /* dispose of the pwm */ > + if (panel->backlight.pwm) > + pwm_put(panel->backlight.pwm); > + The cleanup should be in intel_panel_destroy_backlight to match where .pwm is initialized. BR, Jani. > } > > void intel_backlight_register(struct drm_device *dev) > -- > 2.1.0 >
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 897f17d..b4ebe3b 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -182,7 +182,12 @@ struct intel_panel { bool enabled; bool combination_mode; /* gen 2/4 only */ bool active_low_pwm; + + /* PWM chip */ + struct pwm_device *pwm; + struct backlight_device *device; + } backlight; void (*backlight_power)(struct intel_connector *, bool enable); diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c index be55ffa..83c4540 100644 --- a/drivers/gpu/drm/i915/intel_dsi.c +++ b/drivers/gpu/drm/i915/intel_dsi.c @@ -402,6 +402,8 @@ static void intel_dsi_enable(struct intel_encoder *encoder) intel_dsi_port_enable(encoder); } + + intel_panel_enable_backlight(intel_dsi->attached_connector); } static void intel_dsi_pre_enable(struct intel_encoder *encoder) @@ -466,6 +468,8 @@ static void intel_dsi_pre_disable(struct intel_encoder *encoder) DRM_DEBUG_KMS("\n"); + intel_panel_disable_backlight(intel_dsi->attached_connector); + if (is_vid_mode(intel_dsi)) { /* Send Shutdown command to the panel in LP mode */ for_each_dsi_port(port, intel_dsi->ports) @@ -1132,6 +1136,8 @@ void intel_dsi_init(struct drm_device *dev) } intel_panel_init(&intel_connector->panel, fixed_mode, NULL); + intel_panel_setup_backlight(connector, + (intel_encoder->crtc_mask = (1 << PIPE_A)) ? PIPE_A: PIPE_B); return; diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index 08532d4..5700f6f 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -32,8 +32,12 @@ #include <linux/kernel.h> #include <linux/moduleparam.h> +#include <linux/pwm.h> #include "intel_drv.h" +#define CRC_PMIC_PWM_PERIOD_NS 21333 +#define CRC_PMIC_PWM_STEPS 255 + void intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode, struct drm_display_mode *adjusted_mode) @@ -536,6 +540,15 @@ static u32 vlv_get_backlight(struct intel_connector *connector) return _vlv_get_backlight(dev, pipe); } +static u32 vlv_get_mipi_backlight(struct intel_connector *connector) +{ + struct intel_panel *panel = &connector->panel; + int duty_ns; + + duty_ns = pwm_get_duty_cycle(panel->backlight.pwm); + return DIV_ROUND_UP(duty_ns * 100, CRC_PMIC_PWM_PERIOD_NS); +} + static u32 intel_panel_get_backlight(struct intel_connector *connector) { struct drm_device *dev = connector->base.dev; @@ -616,6 +629,14 @@ static void vlv_set_backlight(struct intel_connector *connector, u32 level) I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level); } +static void vlv_set_mipi_backlight(struct intel_connector *connector, u32 level) +{ + struct intel_panel *panel = &connector->panel; + int duty_ns = DIV_ROUND_UP(level * CRC_PMIC_PWM_PERIOD_NS, 100); + + pwm_config(panel->backlight.pwm, duty_ns, CRC_PMIC_PWM_PERIOD_NS); +} + static void intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level) { @@ -741,6 +762,16 @@ static void vlv_disable_backlight(struct intel_connector *connector) I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE); } +static void vlv_disable_mipi_backlight(struct intel_connector *connector) +{ + struct intel_panel *panel = &connector->panel; + + /* Disable the backlight */ + pwm_config(panel->backlight.pwm, 0, CRC_PMIC_PWM_PERIOD_NS); + usleep_range(2000, 3000); + pwm_disable(panel->backlight.pwm); +} + void intel_panel_disable_backlight(struct intel_connector *connector) { struct drm_device *dev = connector->base.dev; @@ -947,6 +978,16 @@ static void vlv_enable_backlight(struct intel_connector *connector) I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE); } +static void vlv_enable_mipi_backlight(struct intel_connector *connector) +{ + struct intel_panel *panel = &connector->panel; + int duty_ns = DIV_ROUND_UP( + panel->backlight.level * CRC_PMIC_PWM_PERIOD_NS, 100); + + pwm_enable(panel->backlight.pwm); + pwm_config(panel->backlight.pwm, duty_ns, CRC_PMIC_PWM_PERIOD_NS); +} + void intel_panel_enable_backlight(struct intel_connector *connector) { struct drm_device *dev = connector->base.dev; @@ -1299,6 +1340,34 @@ static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe return 0; } +static int vlv_setup_mipi_backlight(struct intel_connector *connector, enum pipe pipe) +{ + struct drm_device *dev = connector->base.dev; + struct intel_panel *panel = &connector->panel; + + /* Get the PWM chip for backlight control */ + panel->backlight.pwm = pwm_get(dev->dev, "pwm_backlight"); + if (IS_ERR(panel->backlight.pwm)) { + DRM_ERROR("Faild to own the pwm chip\n"); + panel->backlight.pwm = NULL; + } else if (pwm_config(panel->backlight.pwm, CRC_PMIC_PWM_PERIOD_NS, + CRC_PMIC_PWM_PERIOD_NS) < 0) { + DRM_ERROR("Failed to configure the pwm chip\n"); + pwm_put(panel->backlight.pwm); + panel->backlight.pwm = NULL; + return -1; + } + + panel->backlight.min = 0; /* 0% */ + panel->backlight.max = 100; /* 100% */ + panel->backlight.level = DIV_ROUND_UP( + pwm_get_duty_cycle(panel->backlight.pwm) * 100, + CRC_PMIC_PWM_PERIOD_NS); + panel->backlight.enabled = panel->backlight.level ? true : false; + + return 0; +} + int intel_panel_setup_backlight(struct drm_connector *connector, enum pipe pipe) { struct drm_device *dev = connector->dev; @@ -1363,11 +1432,19 @@ void intel_panel_init_backlight_funcs(struct drm_device *dev) dev_priv->display.set_backlight = pch_set_backlight; dev_priv->display.get_backlight = pch_get_backlight; } else if (IS_VALLEYVIEW(dev)) { - dev_priv->display.setup_backlight = vlv_setup_backlight; - dev_priv->display.enable_backlight = vlv_enable_backlight; - dev_priv->display.disable_backlight = vlv_disable_backlight; - dev_priv->display.set_backlight = vlv_set_backlight; - dev_priv->display.get_backlight = vlv_get_backlight; + if (dev_priv->vbt.has_mipi) { + dev_priv->display.setup_backlight = vlv_setup_mipi_backlight; + dev_priv->display.enable_backlight = vlv_enable_mipi_backlight; + dev_priv->display.disable_backlight = vlv_disable_mipi_backlight; + dev_priv->display.set_backlight = vlv_set_mipi_backlight; + dev_priv->display.get_backlight = vlv_get_mipi_backlight; + } else { + dev_priv->display.setup_backlight = vlv_setup_backlight; + dev_priv->display.enable_backlight = vlv_enable_backlight; + dev_priv->display.disable_backlight = vlv_disable_backlight; + dev_priv->display.set_backlight = vlv_set_backlight; + dev_priv->display.get_backlight = vlv_get_backlight; + } } else if (IS_GEN4(dev)) { dev_priv->display.setup_backlight = i965_setup_backlight; dev_priv->display.enable_backlight = i965_enable_backlight; @@ -1404,6 +1481,11 @@ void intel_panel_fini(struct intel_panel *panel) if (panel->downclock_mode) drm_mode_destroy(intel_connector->base.dev, panel->downclock_mode); + + /* dispose of the pwm */ + if (panel->backlight.pwm) + pwm_put(panel->backlight.pwm); + } void intel_backlight_register(struct drm_device *dev)
Use the CRC PWM device in intel_panel.c and add new MIPI backlight specififc callbacks v2: Modify to use pwm_config callback CC: Samuel Ortiz <sameo@linux.intel.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Thierry Reding <thierry.reding@gmail.com> Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com> --- drivers/gpu/drm/i915/intel_drv.h | 5 +++ drivers/gpu/drm/i915/intel_dsi.c | 6 +++ drivers/gpu/drm/i915/intel_panel.c | 92 +++++++++++++++++++++++++++++++++++--- 3 files changed, 98 insertions(+), 5 deletions(-)