[PATCH -next v2 2/2] media: aspeed: set hsync and vsync polarities to normal before starting mode detection
Eddie James
eajames at linux.vnet.ibm.com
Thu Oct 10 00:55:41 AEDT 2019
On 9/13/19 1:11 PM, Jae Hyun Yoo wrote:
> 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.
Reviewed-by: Eddie James <eajames at linux.ibm.com>
>
> Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo at linux.intel.com>
> ---
> Changes since v1:
> None
>
> 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 8f77079da55a..929b3a5b8849 100644
> --- a/drivers/media/platform/aspeed-video.c
> +++ b/drivers/media/platform/aspeed-video.c
> @@ -740,6 +740,8 @@ 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,
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