[v2,for_v3.5] media: mx2_camera: Fix mbus format handling

Remove MX2_CAMERA_SWAP16 and MX2_CAMERA_PACK_DIR_MSB flags
so that the driver can negotiate with the attached sensor
whether the mbus format needs convertion from UYUV to YUYV
or not.

Signed-off-by: Javier Martin <javier.martin@vista-silicon.com>
---
Previous version of this patch was requested to be reverted by
Guennadi.

I'm sending a new version which fixes the issue; when mbus fmt
is not found let the driver use default pass-through mode.

Could this patch replace the old version in for_v3.5? It is part of
the following series where patches 1 and 2 have been applied:

[PATCH v2 1/3] media: tvp5150: Fix mbus format.
[PATCH v2 2/3] i.MX27: visstrim_m10: Remove use of MX2_CAMERA_SWAP16.
[PATCH v2 3/3] media: mx2_camera: Fix mbus format handling.

---
 arch/arm/plat-mxc/include/mach/mx2_cam.h |    2 -
 drivers/media/video/mx2_camera.c         |   49 ++++++++++++++++++++++++++---
 2 files changed, 44 insertions(+), 7 deletions(-)

Sorry, forget about this patch.
I've just read that there is a merge conflict too.

I will send a v3 to address this also.

On 1 June 2012 10:28, Javier Martin <javier.martin@vista-silicon.com> wrote:
> Remove MX2_CAMERA_SWAP16 and MX2_CAMERA_PACK_DIR_MSB flags
> so that the driver can negotiate with the attached sensor
> whether the mbus format needs convertion from UYUV to YUYV
> or not.
>
> Signed-off-by: Javier Martin <javier.martin@vista-silicon.com>
> ---
> Previous version of this patch was requested to be reverted by
> Guennadi.
>
> I'm sending a new version which fixes the issue; when mbus fmt
> is not found let the driver use default pass-through mode.
>
> Could this patch replace the old version in for_v3.5? It is part of
> the following series where patches 1 and 2 have been applied:
>
> [PATCH v2 1/3] media: tvp5150: Fix mbus format.
> [PATCH v2 2/3] i.MX27: visstrim_m10: Remove use of MX2_CAMERA_SWAP16.
> [PATCH v2 3/3] media: mx2_camera: Fix mbus format handling.
>
> ---
>  arch/arm/plat-mxc/include/mach/mx2_cam.h |    2 -
>  drivers/media/video/mx2_camera.c         |   49 ++++++++++++++++++++++++++---
>  2 files changed, 44 insertions(+), 7 deletions(-)
>
> diff --git a/arch/arm/plat-mxc/include/mach/mx2_cam.h b/arch/arm/plat-mxc/include/mach/mx2_cam.h
> index 3c080a3..7ded6f1 100644
> --- a/arch/arm/plat-mxc/include/mach/mx2_cam.h
> +++ b/arch/arm/plat-mxc/include/mach/mx2_cam.h
> @@ -23,7 +23,6 @@
>  #ifndef __MACH_MX2_CAM_H_
>  #define __MACH_MX2_CAM_H_
>
> -#define MX2_CAMERA_SWAP16              (1 << 0)
>  #define MX2_CAMERA_EXT_VSYNC           (1 << 1)
>  #define MX2_CAMERA_CCIR                        (1 << 2)
>  #define MX2_CAMERA_CCIR_INTERLACE      (1 << 3)
> @@ -31,7 +30,6 @@
>  #define MX2_CAMERA_GATED_CLOCK         (1 << 5)
>  #define MX2_CAMERA_INV_DATA            (1 << 6)
>  #define MX2_CAMERA_PCLK_SAMPLE_RISING  (1 << 7)
> -#define MX2_CAMERA_PACK_DIR_MSB                (1 << 8)
>
>  /**
>  * struct mx2_camera_platform_data - optional platform data for mx2_camera
> diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c
> index 18afaee..bdbb7c9 100644
> --- a/drivers/media/video/mx2_camera.c
> +++ b/drivers/media/video/mx2_camera.c
> @@ -344,6 +344,19 @@ static struct mx2_fmt_cfg mx27_emma_prp_table[] = {
>                                        PRP_INTR_CH2OVF,
>                }
>        },
> +       {
> +               .in_fmt         = V4L2_MBUS_FMT_UYVY8_2X8,
> +               .out_fmt        = V4L2_PIX_FMT_YUV420,
> +               .cfg            = {
> +                       .channel        = 2,
> +                       .in_fmt         = PRP_CNTL_DATA_IN_YUV422,
> +                       .out_fmt        = PRP_CNTL_CH2_OUT_YUV420,
> +                       .src_pixel      = 0x22000888, /* YUV422 (YUYV) */
> +                       .irq_flags      = PRP_INTR_RDERR | PRP_INTR_CH2WERR |
> +                                       PRP_INTR_CH2FC | PRP_INTR_LBOVF |
> +                                       PRP_INTR_CH2OVF,
> +               }
> +       },
>  };
>
>  static struct mx2_fmt_cfg *mx27_emma_prp_get_format(
> @@ -980,6 +993,7 @@ static int mx2_camera_set_bus_param(struct soc_camera_device *icd)
>        struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
>        struct mx2_camera_dev *pcdev = ici->priv;
>        struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
> +       const struct soc_camera_format_xlate *xlate;
>        unsigned long common_flags;
>        int ret;
>        int bytesperline;
> @@ -1024,14 +1038,28 @@ static int mx2_camera_set_bus_param(struct soc_camera_device *icd)
>                return ret;
>        }
>
> +       xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
> +       if (!xlate) {
> +               dev_warn(icd->parent, "Format %x not found\n", pixfmt);
> +               return -EINVAL;
> +       }
> +
> +       if (xlate->code == V4L2_MBUS_FMT_YUYV8_2X8) {
> +               csicr1 |= CSICR1_PACK_DIR;
> +               csicr1 &= ~CSICR1_SWAP16_EN;
> +               dev_dbg(icd->parent, "already yuyv format, don't convert\n");
> +       } else if (xlate->code == V4L2_MBUS_FMT_UYVY8_2X8) {
> +               csicr1 &= ~CSICR1_PACK_DIR;
> +               csicr1 |= CSICR1_SWAP16_EN;
> +               dev_dbg(icd->parent, "convert uyvy mbus format into yuyv\n");
> +       }
> +
>        if (common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
>                csicr1 |= CSICR1_REDGE;
>        if (common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
>                csicr1 |= CSICR1_SOF_POL;
>        if (common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
>                csicr1 |= CSICR1_HSYNC_POL;
> -       if (pcdev->platform_flags & MX2_CAMERA_SWAP16)
> -               csicr1 |= CSICR1_SWAP16_EN;
>        if (pcdev->platform_flags & MX2_CAMERA_EXT_VSYNC)
>                csicr1 |= CSICR1_EXT_VSYNC;
>        if (pcdev->platform_flags & MX2_CAMERA_CCIR)
> @@ -1042,8 +1070,6 @@ static int mx2_camera_set_bus_param(struct soc_camera_device *icd)
>                csicr1 |= CSICR1_GCLK_MODE;
>        if (pcdev->platform_flags & MX2_CAMERA_INV_DATA)
>                csicr1 |= CSICR1_INV_DATA;
> -       if (pcdev->platform_flags & MX2_CAMERA_PACK_DIR_MSB)
> -               csicr1 |= CSICR1_PACK_DIR;
>
>        pcdev->csicr1 = csicr1;
>
> @@ -1118,7 +1144,8 @@ static int mx2_camera_get_formats(struct soc_camera_device *icd,
>                return 0;
>        }
>
> -       if (code == V4L2_MBUS_FMT_YUYV8_2X8) {
> +       if (code == V4L2_MBUS_FMT_YUYV8_2X8 ||
> +           code == V4L2_MBUS_FMT_UYVY8_2X8) {
>                formats++;
>                if (xlate) {
>                        /*
> @@ -1134,6 +1161,18 @@ static int mx2_camera_get_formats(struct soc_camera_device *icd,
>                }
>        }
>
> +       if (code == V4L2_MBUS_FMT_UYVY8_2X8) {
> +               formats++;
> +               if (xlate) {
> +                       xlate->host_fmt =
> +                               soc_mbus_get_fmtdesc(V4L2_MBUS_FMT_YUYV8_2X8);
> +                       xlate->code     = code;
> +                       dev_dbg(dev, "Providing host format %s for sensor code %d\n",
> +                               xlate->host_fmt->name, code);
> +                       xlate++;
> +               }
> +       }
> +
>        /* Generic pass-trough */
>        formats++;
>        if (xlate) {
> --
> 1.7.0.4
>