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, 147 insertions, 0 deletions

diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c
index 30cc3347ae52..4b11257c3184 100644
--- a/drivers/media/video/v4l2-ioctl.c
+++ b/drivers/media/video/v4l2-ioctl.c
@@ -284,6 +284,12 @@ static const char *v4l2_ioctls[] = {
 	[_IOC_NR(VIDIOC_DBG_G_CHIP_IDENT)] = "VIDIOC_DBG_G_CHIP_IDENT",
 	[_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)]   = "VIDIOC_S_HW_FREQ_SEEK",
 #endif
+	[_IOC_NR(VIDIOC_ENUM_DV_PRESETS)]  = "VIDIOC_ENUM_DV_PRESETS",
+	[_IOC_NR(VIDIOC_S_DV_PRESET)]	   = "VIDIOC_S_DV_PRESET",
+	[_IOC_NR(VIDIOC_G_DV_PRESET)]	   = "VIDIOC_G_DV_PRESET",
+	[_IOC_NR(VIDIOC_QUERY_DV_PRESET)]  = "VIDIOC_QUERY_DV_PRESET",
+	[_IOC_NR(VIDIOC_S_DV_TIMINGS)]     = "VIDIOC_S_DV_TIMINGS",
+	[_IOC_NR(VIDIOC_G_DV_TIMINGS)]     = "VIDIOC_G_DV_TIMINGS",
 };
 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
 
@@ -1135,6 +1141,19 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_input *p = arg;
 
+		/*
+		 * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
+		 * CAP_STD here based on ioctl handler provided by the
+		 * driver. If the driver doesn't support these
+		 * for a specific input, it must override these flags.
+		 */
+		if (ops->vidioc_s_std)
+			p->capabilities |= V4L2_IN_CAP_STD;
+		if (ops->vidioc_s_dv_preset)
+			p->capabilities |= V4L2_IN_CAP_PRESETS;
+		if (ops->vidioc_s_dv_timings)
+			p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS;
+
 		if (!ops->vidioc_enum_input)
 			break;
 
@@ -1179,6 +1198,19 @@ static long __video_do_ioctl(struct file *file,
 		if (!ops->vidioc_enum_output)
 			break;
 
+		/*
+		 * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
+		 * CAP_STD here based on ioctl handler provided by the
+		 * driver. If the driver doesn't support these
+		 * for a specific output, it must override these flags.
+		 */
+		if (ops->vidioc_s_std)
+			p->capabilities |= V4L2_OUT_CAP_STD;
+		if (ops->vidioc_s_dv_preset)
+			p->capabilities |= V4L2_OUT_CAP_PRESETS;
+		if (ops->vidioc_s_dv_timings)
+			p->capabilities |= V4L2_OUT_CAP_CUSTOM_TIMINGS;
+
 		ret = ops->vidioc_enum_output(file, fh, p);
 		if (!ret)
 			dbgarg(cmd, "index=%d, name=%s, type=%d, "
@@ -1794,6 +1826,121 @@ static long __video_do_ioctl(struct file *file,
 		}
 		break;
 	}
+	case VIDIOC_ENUM_DV_PRESETS:
+	{
+		struct v4l2_dv_enum_preset *p = arg;
+
+		if (!ops->vidioc_enum_dv_presets)
+			break;
+
+		ret = ops->vidioc_enum_dv_presets(file, fh, p);
+		if (!ret)
+			dbgarg(cmd,
+				"index=%d, preset=%d, name=%s, width=%d,"
+				" height=%d ",
+				p->index, p->preset, p->name, p->width,
+				p->height);
+		break;
+	}
+	case VIDIOC_S_DV_PRESET:
+	{
+		struct v4l2_dv_preset *p = arg;
+
+		if (!ops->vidioc_s_dv_preset)
+			break;
+
+		dbgarg(cmd, "preset=%d\n", p->preset);
+		ret = ops->vidioc_s_dv_preset(file, fh, p);
+		break;
+	}
+	case VIDIOC_G_DV_PRESET:
+	{
+		struct v4l2_dv_preset *p = arg;
+
+		if (!ops->vidioc_g_dv_preset)
+			break;
+
+		ret = ops->vidioc_g_dv_preset(file, fh, p);
+		if (!ret)
+			dbgarg(cmd, "preset=%d\n", p->preset);
+		break;
+	}
+	case VIDIOC_QUERY_DV_PRESET:
+	{
+		struct v4l2_dv_preset *p = arg;
+
+		if (!ops->vidioc_query_dv_preset)
+			break;
+
+		ret = ops->vidioc_query_dv_preset(file, fh, p);
+		if (!ret)
+			dbgarg(cmd, "preset=%d\n", p->preset);
+		break;
+	}
+	case VIDIOC_S_DV_TIMINGS:
+	{
+		struct v4l2_dv_timings *p = arg;
+
+		if (!ops->vidioc_s_dv_timings)
+			break;
+
+		switch (p->type) {
+		case V4L2_DV_BT_656_1120:
+			dbgarg2("bt-656/1120:interlaced=%d, pixelclock=%lld,"
+				" width=%d, height=%d, polarities=%x,"
+				" hfrontporch=%d, hsync=%d, hbackporch=%d,"
+				" vfrontporch=%d, vsync=%d, vbackporch=%d,"
+				" il_vfrontporch=%d, il_vsync=%d,"
+				" il_vbackporch=%d\n",
+				p->bt.interlaced, p->bt.pixelclock,
+				p->bt.width, p->bt.height, p->bt.polarities,
+				p->bt.hfrontporch, p->bt.hsync,
+				p->bt.hbackporch, p->bt.vfrontporch,
+				p->bt.vsync, p->bt.vbackporch,
+				p->bt.il_vfrontporch, p->bt.il_vsync,
+				p->bt.il_vbackporch);
+			ret = ops->vidioc_s_dv_timings(file, fh, p);
+			break;
+		default:
+			dbgarg2("Unknown type %d!\n", p->type);
+			break;
+		}
+		break;
+	}
+	case VIDIOC_G_DV_TIMINGS:
+	{
+		struct v4l2_dv_timings *p = arg;
+
+		if (!ops->vidioc_g_dv_timings)
+			break;
+
+		ret = ops->vidioc_g_dv_timings(file, fh, p);
+		if (!ret) {
+			switch (p->type) {
+			case V4L2_DV_BT_656_1120:
+				dbgarg2("bt-656/1120:interlaced=%d,"
+					" pixelclock=%lld,"
+					" width=%d, height=%d, polarities=%x,"
+					" hfrontporch=%d, hsync=%d,"
+					" hbackporch=%d, vfrontporch=%d,"
+					" vsync=%d, vbackporch=%d,"
+					" il_vfrontporch=%d, il_vsync=%d,"
+					" il_vbackporch=%d\n",
+					p->bt.interlaced, p->bt.pixelclock,
+					p->bt.width, p->bt.height,
+					p->bt.polarities, p->bt.hfrontporch,
+					p->bt.hsync, p->bt.hbackporch,
+					p->bt.vfrontporch, p->bt.vsync,
+					p->bt.vbackporch, p->bt.il_vfrontporch,
+					p->bt.il_vsync, p->bt.il_vbackporch);
+				break;
+			default:
+				dbgarg2("Unknown type %d!\n", p->type);
+				break;
+			}
+		}
+		break;
+	}
 
 	default:
 	{