V4L/DVB (13571): v4l: Adding Digital Video Timings APIs

This adds the above APIs to the v4l2 core. This is based on version v1.2
of the RFC titled "V4L - Support for video timings at the input/output interface"
Following new ioctls are added:-

        - VIDIOC_ENUM_DV_PRESETS
        - VIDIOC_S_DV_PRESET
        - VIDIOC_G_DV_PRESET
        - VIDIOC_QUERY_DV_PRESET
        - VIDIOC_S_DV_TIMINGS
        - VIDIOC_G_DV_TIMINGS

Please refer to the RFC for the details. This code was tested using vpfe
capture driver on TI's DM365. Following is the test configuration used :-

Blu-Ray HD DVD source -> TVP7002 -> DM365 (VPFE) ->DDR

A draft version of the TVP7002 driver (currently being reviewed in the mailing
list) was used that supports V4L2_DV_1080I60 & V4L2_DV_720P60 presets.

A loopback video capture application was used for testing these APIs. This calls
following IOCTLS :-

 -  verify the new v4l2_input capabilities flag added
 -  Enumerate available presets using VIDIOC_ENUM_DV_PRESETS
 -  Set one of the supported preset using VIDIOC_S_DV_PRESET
 -  Get current preset using VIDIOC_G_DV_PRESET
 -  Detect current preset using VIDIOC_QUERY_DV_PRESET
 -  Using stub functions in tvp7002, verify VIDIOC_S_DV_TIMINGS
    and VIDIOC_G_DV_TIMINGS ioctls are received at the sub device.
 -  Tested on 64bit platform by Hans Verkuil

Signed-off-by: Muralidharan Karicheri <m-karicheri2@ti.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Reviewed-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index 00bf17608453..7a3408f9d0f2 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -217,6 +217,19 @@ struct v4l2_subdev_audio_ops {
 
    s_routing: see s_routing in audio_ops, except this version is for video
         devices.
+
+   s_dv_preset: set dv (Digital Video) preset in the sub device. Similar to
+        s_std()
+
+   query_dv_preset: query dv preset in the sub device. This is similar to
+        querystd()
+
+   s_dv_timings(): Set custom dv timings in the sub device. This is used
+        when sub device is capable of setting detailed timing information
+        in the hardware to generate/detect the video signal.
+
+   g_dv_timings(): Get custom dv timings in the sub device.
+
  */
 struct v4l2_subdev_video_ops {
         int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
@@ -240,6 +253,14 @@ struct v4l2_subdev_video_ops {
         int (*s_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param);
         int (*enum_framesizes)(struct v4l2_subdev *sd, struct v4l2_frmsizeenum *fsize);
         int (*enum_frameintervals)(struct v4l2_subdev *sd, struct v4l2_frmivalenum *fival);
+        int (*s_dv_preset)(struct v4l2_subdev *sd,
+                        struct v4l2_dv_preset *preset);
+        int (*query_dv_preset)(struct v4l2_subdev *sd,
+                        struct v4l2_dv_preset *preset);
+        int (*s_dv_timings)(struct v4l2_subdev *sd,
+                        struct v4l2_dv_timings *timings);
+        int (*g_dv_timings)(struct v4l2_subdev *sd,
+                        struct v4l2_dv_timings *timings);
 };
 
 /*