[media] adv7842: pixelclock read-out

Incorrect registers used for pixelclock read-out.
Same registers as for adv7604 which actually gave an almost
correct read-out, even they are not documented for adv7842.
Corrected deep-color pixel-clock correction.

Signed-off-by: Martin Bugge <marbugge@cisco.com>
Cc: Mats Randgaard <matrandg@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/drivers/media/i2c/adv7842.c b/drivers/media/i2c/adv7842.c
index f7a4d79..3aa1a7c 100644 (file)
--- a/drivers/media/i2c/adv7842.c
+++ b/drivers/media/i2c/adv7842.c
@@ -1449,12 +1449,11 @@ static int adv7842_query_dv_timings(struct v4l2_subdev *sd,
 
                bt->width = (hdmi_read(sd, 0x07) & 0x0f) * 256 + hdmi_read(sd, 0x08);
                bt->height = (hdmi_read(sd, 0x09) & 0x0f) * 256 + hdmi_read(sd, 0x0a);
-               freq = (hdmi_read(sd, 0x06) * 1000000) +
-                      ((hdmi_read(sd, 0x3b) & 0x30) >> 4) * 250000;
-
+               freq = ((hdmi_read(sd, 0x51) << 1) + (hdmi_read(sd, 0x52) >> 7)) * 1000000;
+               freq += ((hdmi_read(sd, 0x52) & 0x7f) * 7813);
                if (is_hdmi(sd)) {
                        /* adjust for deep color mode */
-                       freq = freq * 8 / (((hdmi_read(sd, 0x0b) & 0xc0) >> 5) + 8);
+                       freq = freq * 8 / (((hdmi_read(sd, 0x0b) & 0xc0) >> 6) * 2 + 8);
                }
                bt->pixelclock = freq;
                bt->hfrontporch = (hdmi_read(sd, 0x20) & 0x03) * 256 +