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media: aspeed: set hsync and vsync polarities to normal before starting mode detection

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[ 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>
This commit is contained in:
Jae Hyun Yoo 2019-09-13 15:11:05 -03:00 committed by Greg Kroah-Hartman
parent ce9071fa5a
commit 1d1d6ea16d
1 changed files with 2 additions and 0 deletions
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2
drivers/media/platform/aspeed-video.c
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@ -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,