Hi William,
On Wed, 3 Jun 2015, William Towle wrote:
> Add detection of source pad number for drivers aware of the media
> controller API, so that the combination of soc_camera and rcar_vin
> can create device nodes to support modern drivers such as adv7604.c
> (for HDMI on Lager) and the converted adv7180.c (for composite)
> underneath.
>
> Building rcar_vin gains a dependency on CONFIG_MEDIA_CONTROLLER, in
> line with requirements for building the drivers associated with it.
>
> Signed-off-by: William Towle <william.to...@codethink.co.uk>
> Signed-off-by: Rob Taylor <rob.tay...@codethink.co.uk>
> ---
> drivers/media/platform/soc_camera/Kconfig | 1 +
> drivers/media/platform/soc_camera/rcar_vin.c | 1 +
> drivers/media/platform/soc_camera/soc_camera.c | 46
> ++++++++++++++++++++++++
> include/media/soc_camera.h | 1 +
> 4 files changed, 49 insertions(+)
>
> diff --git a/drivers/media/platform/soc_camera/Kconfig
> b/drivers/media/platform/soc_camera/Kconfig
> index f2776cd..5c45c83 100644
> --- a/drivers/media/platform/soc_camera/Kconfig
> +++ b/drivers/media/platform/soc_camera/Kconfig
> @@ -38,6 +38,7 @@ config VIDEO_RCAR_VIN
> depends on VIDEO_DEV && SOC_CAMERA
> depends on ARCH_SHMOBILE || COMPILE_TEST
> depends on HAS_DMA
> + depends on MEDIA_CONTROLLER
> select VIDEOBUF2_DMA_CONTIG
> select SOC_CAMERA_SCALE_CROP
> ---help---
> diff --git a/drivers/media/platform/soc_camera/rcar_vin.c
> b/drivers/media/platform/soc_camera/rcar_vin.c
> index 16352a8..00c1034 100644
> --- a/drivers/media/platform/soc_camera/rcar_vin.c
> +++ b/drivers/media/platform/soc_camera/rcar_vin.c
> @@ -1359,6 +1359,7 @@ static int rcar_vin_get_formats(struct
> soc_camera_device *icd, unsigned int idx,
> struct device *dev = icd->parent;
> int shift;
>
> + fmt.pad = icd->src_pad_idx;
> ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
> if (ret < 0)
> return ret;
> diff --git a/drivers/media/platform/soc_camera/soc_camera.c
> b/drivers/media/platform/soc_camera/soc_camera.c
> index d708df4..c4952c8 100644
> --- a/drivers/media/platform/soc_camera/soc_camera.c
> +++ b/drivers/media/platform/soc_camera/soc_camera.c
> @@ -1293,6 +1293,9 @@ static int soc_camera_probe_finish(struct
> soc_camera_device *icd)
> .which = V4L2_SUBDEV_FORMAT_ACTIVE,
> };
> struct v4l2_mbus_framefmt *mf = &fmt.format;
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> + struct media_pad pad;
> +#endif
> int ret;
>
> sd->grp_id = soc_camera_grp_id(icd);
> @@ -1310,8 +1313,40 @@ static int soc_camera_probe_finish(struct
> soc_camera_device *icd)
> return ret;
> }
>
> + icd->src_pad_idx = -1;
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> /* At this point client .probe() should have run already */
Please, leave this comment outside of #ifdef.
> + ret = media_entity_init(&icd->vdev->entity, 1, &pad, 0);
> + if (ret < 0) {
> + goto eusrfmt;
> + } else {
You don't need this "else" here. Just put pad_idx declaration under
"#ifdef" above.
> + int pad_idx;
> +
> + for (pad_idx = 0; pad_idx < sd->entity.num_pads; pad_idx++)
> + if (sd->entity.pads[pad_idx].flags
> + == MEDIA_PAD_FL_SOURCE)
> + break;
> + if (pad_idx >= sd->entity.num_pads)
> + goto eusrfmt;
> +
> + ret = media_entity_create_link(&icd->vdev->entity, 0,
> + &sd->entity, pad_idx,
> + MEDIA_LNK_FL_IMMUTABLE |
> + MEDIA_LNK_FL_ENABLED);
> + if (ret < 0)
> + goto eusrfmt;
> +
> + icd->src_pad_idx = pad_idx;
> + ret = soc_camera_init_user_formats(icd);
I don't think you need soc_camera_init_user_formats() twice - under ifdef
and outside of it. Just add "icd->src_pad_idx = -1;" in the error case
below:
> + if (ret < 0) {
> + icd->src_pad_idx = -1;
> + goto eusrfmt;
> + }
> + }
> +#else
> ret = soc_camera_init_user_formats(icd);
> +#endif
> +
> if (ret < 0)
> goto eusrfmt;
>
> @@ -1322,6 +1357,9 @@ static int soc_camera_probe_finish(struct
> soc_camera_device *icd)
> goto evidstart;
>
> /* Try to improve our guess of a reasonable window format */
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> + fmt.pad = icd->src_pad_idx;
> +#endif
> if (!v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt)) {
> icd->user_width = mf->width;
> icd->user_height = mf->height;
> @@ -1335,6 +1373,9 @@ static int soc_camera_probe_finish(struct
> soc_camera_device *icd)
> evidstart:
> soc_camera_free_user_formats(icd);
> eusrfmt:
> +#if defined(CONFIG_MEDIA_CONTROLLER)
+ icd->src_pad_idx = -1;
> + media_entity_cleanup(&icd->vdev->entity);
> +#endif
> soc_camera_remove_device(icd);
>
> return ret;
Thanks
Guennadi
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