lkml.org 
[lkml]   [2019]   [Dec]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 5.4 174/434] media: aspeed: set hsync and vsync polarities to normal before starting mode detection
    Date
    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 eb12f3793062..84e0650106f5 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,
    --
    2.20.1


    \
     
     \ /
      Last update: 2019-12-29 19:08    [W:4.264 / U:1.352 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site