Re: [PATCH 4/8] ispvideo: Add support for G/S/ENUM_STD ioctl

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi,

Thanks for the patch.

On Thursday 08 September 2011 15:35:22 Deepthy Ravi wrote:
> From: Vaibhav Hiremath <hvaibhav@ti.com>
> 
> In order to support TVP5146 (for that matter any video decoder),
> it is important to support G/S/ENUM_STD ioctl on /dev/videoX
> device node.

Why so ? Shouldn't it be queried on the subdev output pad directly ?

> Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
> Signed-off-by: Deepthy Ravi <deepthy.ravi@ti.com>
> ---
>  drivers/media/video/omap3isp/ispvideo.c |   98
> ++++++++++++++++++++++++++++++- drivers/media/video/omap3isp/ispvideo.h | 
>   1 +
>  2 files changed, 98 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/media/video/omap3isp/ispvideo.c
> b/drivers/media/video/omap3isp/ispvideo.c index d5b8236..ff0ffed 100644
> --- a/drivers/media/video/omap3isp/ispvideo.c
> +++ b/drivers/media/video/omap3isp/ispvideo.c
> @@ -37,6 +37,7 @@
>  #include <plat/iovmm.h>
>  #include <plat/omap-pm.h>
> 
> +#include <media/tvp514x.h>
>  #include "ispvideo.h"
>  #include "isp.h"
> 
> @@ -1136,7 +1137,97 @@ isp_video_g_input(struct file *file, void *fh,
> unsigned int *input) static int
>  isp_video_s_input(struct file *file, void *fh, unsigned int input)
>  {
> -	return input == 0 ? 0 : -EINVAL;
> +	struct isp_video *video = video_drvdata(file);
> +	struct media_entity *entity = &video->video.entity;
> +	struct media_entity_graph graph;
> +	struct v4l2_subdev *subdev;
> +	struct v4l2_routing route;
> +	int ret = 0;
> +
> +	media_entity_graph_walk_start(&graph, entity);
> +	while ((entity = media_entity_graph_walk_next(&graph))) {
> +		if (media_entity_type(entity) ==
> +				MEDIA_ENT_T_V4L2_SUBDEV) {
> +			subdev = media_entity_to_v4l2_subdev(entity);
> +			if (subdev != NULL) {
> +				if (input == 0)
> +					route.input = INPUT_CVBS_VI4A;
> +				else
> +					route.input = INPUT_SVIDEO_VI2C_VI1C;
> +				route.output = 0;
> +				ret = v4l2_subdev_call(subdev, video, s_routing,
> +						route.input, route.output, 0);
> +				if (ret < 0 && ret != -ENOIOCTLCMD)
> +					return ret;
> +			}
> +		}
> +	}
> +
> +	return 0;
> +}
> +
> +static int isp_video_querystd(struct file *file, void *fh, v4l2_std_id *a)
> +{
> +	struct isp_video_fh *vfh = to_isp_video_fh(fh);
> +	struct isp_video *video = video_drvdata(file);
> +	struct media_entity *entity = &video->video.entity;
> +	struct media_entity_graph graph;
> +	struct v4l2_subdev *subdev;
> +	int ret = 0;
> +
> +	media_entity_graph_walk_start(&graph, entity);
> +	while ((entity = media_entity_graph_walk_next(&graph))) {
> +		if (media_entity_type(entity) ==
> +				MEDIA_ENT_T_V4L2_SUBDEV) {
> +			subdev = media_entity_to_v4l2_subdev(entity);
> +			if (subdev != NULL) {
> +				ret = v4l2_subdev_call(subdev, video, querystd,
> +						a);
> +				if (ret < 0 && ret != -ENOIOCTLCMD)
> +					return ret;
> +			}
> +		}
> +	}
> +
> +	vfh->standard.id = *a;
> +	return 0;
> +}
> +
> +static int isp_video_g_std(struct file *file, void *fh, v4l2_std_id *norm)
> +{
> +	struct isp_video_fh *vfh = to_isp_video_fh(fh);
> +	struct isp_video *video = video_drvdata(file);
> +
> +	mutex_lock(&video->mutex);
> +	*norm = vfh->standard.id;
> +	mutex_unlock(&video->mutex);
> +
> +	return 0;
> +}
> +
> +static int isp_video_s_std(struct file *file, void *fh, v4l2_std_id *norm)
> +{
> +	struct isp_video *video = video_drvdata(file);
> +	struct media_entity *entity = &video->video.entity;
> +	struct media_entity_graph graph;
> +	struct v4l2_subdev *subdev;
> +	int ret = 0;
> +
> +	media_entity_graph_walk_start(&graph, entity);
> +	while ((entity = media_entity_graph_walk_next(&graph))) {
> +		if (media_entity_type(entity) ==
> +				MEDIA_ENT_T_V4L2_SUBDEV) {
> +			subdev = media_entity_to_v4l2_subdev(entity);
> +			if (subdev != NULL) {
> +				ret = v4l2_subdev_call(subdev, core, s_std,
> +						*norm);
> +				if (ret < 0 && ret != -ENOIOCTLCMD)
> +					return ret;
> +			}
> +		}
> +	}
> +
> +	return 0;
>  }
> 
>  static const struct v4l2_ioctl_ops isp_video_ioctl_ops = {
> @@ -1161,6 +1252,9 @@ static const struct v4l2_ioctl_ops
> isp_video_ioctl_ops = { .vidioc_enum_input		= isp_video_enum_input,
>  	.vidioc_g_input			= isp_video_g_input,
>  	.vidioc_s_input			= isp_video_s_input,
> +	.vidioc_querystd		= isp_video_querystd,
> +	.vidioc_g_std			= isp_video_g_std,
> +	.vidioc_s_std			= isp_video_s_std,
>  };
> 
>  /*
> --------------------------------------------------------------------------
> --- @@ -1325,6 +1419,8 @@ int omap3isp_video_register(struct isp_video
> *video, struct v4l2_device *vdev) printk(KERN_ERR "%s: could not register
> video device (%d)\n",
>  			__func__, ret);
> 
> +	video->video.tvnorms		= V4L2_STD_NTSC | V4L2_STD_PAL;
> +	video->video.current_norm	= V4L2_STD_NTSC;
>  	return ret;
>  }
> 
> diff --git a/drivers/media/video/omap3isp/ispvideo.h
> b/drivers/media/video/omap3isp/ispvideo.h index 53160aa..bb8feb6 100644
> --- a/drivers/media/video/omap3isp/ispvideo.h
> +++ b/drivers/media/video/omap3isp/ispvideo.h
> @@ -182,6 +182,7 @@ struct isp_video_fh {
>  	struct isp_video *video;
>  	struct isp_video_queue queue;
>  	struct v4l2_format format;
> +	struct v4l2_standard standard;
>  	struct v4l2_fract timeperframe;
>  };

-- 
Regards,

Laurent Pinchart