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[media] adv7604: add vic detect

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Obtain the correct timings based on the VIC code from the AVI InfoFrame.

It does a sanity check to see if at least the measured width and height
are in line with what the VIC code reports. If not, then use the timings
instead of the VIC code (as per the CEA-861 spec).

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Hans Verkuil 2016-07-14 11:53:47 -03:00 committed by Mauro Carvalho Chehab
parent d736e348a0
commit 827c1f525a
1 changed files with 16 additions and 2 deletions
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18
drivers/media/i2c/adv7604.c
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@ -1566,10 +1566,24 @@ static int adv76xx_query_dv_timings(struct v4l2_subdev *sd,
V4L2_DV_INTERLACED : V4L2_DV_PROGRESSIVE;
if (is_digital_input(sd)) {
bool hdmi_signal = hdmi_read(sd, 0x05) & 0x80;
u8 vic = 0;
u32 w, h;
w = hdmi_read16(sd, 0x07, info->linewidth_mask);
h = hdmi_read16(sd, 0x09, info->field0_height_mask);
if (hdmi_signal && (io_read(sd, 0x60) & 1))
vic = infoframe_read(sd, 0x04);
if (vic && v4l2_find_dv_timings_cea861_vic(timings, vic) &&
bt->width == w && bt->height == h)
goto found;
timings->type = V4L2_DV_BT_656_1120;
bt->width = hdmi_read16(sd, 0x07, info->linewidth_mask);
bt->height = hdmi_read16(sd, 0x09, info->field0_height_mask);
bt->width = w;
bt->height = h;
bt->pixelclock = info->read_hdmi_pixelclock(sd);
bt->hfrontporch = hdmi_read16(sd, 0x20, info->hfrontporch_mask);
bt->hsync = hdmi_read16(sd, 0x22, info->hsync_mask);