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Message-Id: <201109081921.28051.laurent.pinchart@ideasonboard.com>
Date: Thu, 8 Sep 2011 19:21:27 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Deepthy Ravi <deepthy.ravi@...com>
Cc: linux-media@...r.kernel.org, tony@...mide.com,
linux@....linux.org.uk, linux-omap@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
mchehab@...radead.org, g.liakhovetski@....de,
Vaibhav Hiremath <hvaibhav@...com>
Subject: Re: [PATCH 4/8] ispvideo: Add support for G/S/ENUM_STD ioctl
Hi,
Thanks for the patch.
On Thursday 08 September 2011 15:35:22 Deepthy Ravi wrote:
> From: Vaibhav Hiremath <hvaibhav@...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@...com>
> Signed-off-by: Deepthy Ravi <deepthy.ravi@...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
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