From: Jae Hyun Yoo jae.hyun.yoo@linux.intel.com
[ Upstream commit 5b3f3c41c5c791c1c22cd91655e7ef4b2a1dff7c ]
Sometimes it detects a weird resolution such as 1024x287 when the actual resolution is 1024x768. To resolve such an issue, this commit adds clearing for hsync and vsync polarity register bits at the beginning of the first mode detection. This is recommended in the datasheet.
Signed-off-by: Jae Hyun Yoo jae.hyun.yoo@linux.intel.com Reviewed-by: Eddie James eajames@linux.ibm.com Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+samsung@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/platform/aspeed-video.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c index eb12f37930629..84e0650106f51 100644 --- a/drivers/media/platform/aspeed-video.c +++ b/drivers/media/platform/aspeed-video.c @@ -741,6 +741,8 @@ static void aspeed_video_get_resolution(struct aspeed_video *video) }
set_bit(VIDEO_RES_DETECT, &video->flags); + aspeed_video_update(video, VE_CTRL, + VE_CTRL_VSYNC_POL | VE_CTRL_HSYNC_POL, 0); aspeed_video_enable_mode_detect(video);
rc = wait_event_interruptible_timeout(video->wait,