[PATCH] media: aspeed: Fix incorrect resolution detected
Paul Menzel
pmenzel at molgen.mpg.de
Tue Nov 9 22:22:37 AEDT 2021
Dear Jammy,
Am 09.11.21 um 10:54 schrieb Jammy Huang:
> During the process of os-installation, detected resolution's height
> could be less than the correct one.
Can you please elaborate? What OS? What resolution was and what
resolution should have been detected?
> Increase min-required-count of stable signal to fix the problem.
So you do two changes in the patch? First use the bitfield access
macros, and then change VE_MODE_DT_HOR_STABLE and VE_MODE_DT_VER_STABLE
from 6 to 10? Is that the amount of iterations? Why 10 and not 20?
How much time do four iterations add?
Sorry for my ignorance, but if you could make it two patches, that’d be
great.
> Fixes: d2b4387f3bdf ("media: platform: Add Aspeed Video Engine driver")
> Signed-off-by: Jammy Huang <jammy_huang at aspeedtech.com>
> ---
> drivers/media/platform/aspeed-video.c | 13 ++++++++++++-
> 1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c
> index 5da52646b298..625a77ddb479 100644
> --- a/drivers/media/platform/aspeed-video.c
> +++ b/drivers/media/platform/aspeed-video.c
> @@ -196,6 +196,12 @@
> #define VE_INTERRUPT_VSYNC_DESC BIT(11)
>
> #define VE_MODE_DETECT 0x30c
> +#define VE_MODE_DT_HOR_TOLER GENMASK(31, 28)
> +#define VE_MODE_DT_VER_TOLER GENMASK(27, 24)
> +#define VE_MODE_DT_HOR_STABLE GENMASK(23, 20)
> +#define VE_MODE_DT_VER_STABLE GENMASK(19, 16)
> +#define VE_MODE_DT_EDG_THROD GENMASK(15, 8)
> +
> #define VE_MEM_RESTRICT_START 0x310
> #define VE_MEM_RESTRICT_END 0x314
>
> @@ -1199,7 +1205,12 @@ static void aspeed_video_init_regs(struct aspeed_video *video)
> aspeed_video_write(video, VE_SCALING_FILTER3, 0x00200000);
>
> /* Set mode detection defaults */
> - aspeed_video_write(video, VE_MODE_DETECT, 0x22666500);
> + aspeed_video_write(video, VE_MODE_DETECT,
> + FIELD_PREP(VE_MODE_DT_HOR_TOLER, 2) |
> + FIELD_PREP(VE_MODE_DT_VER_TOLER, 2) |
> + FIELD_PREP(VE_MODE_DT_HOR_STABLE, 10) |
> + FIELD_PREP(VE_MODE_DT_VER_STABLE, 10) |
> + FIELD_PREP(VE_MODE_DT_EDG_THROD, 0x65));
>
> aspeed_video_write(video, VE_BCD_CTRL, 0);
> }
>
Kind regards,
Paul
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