Re: Flickering with page-flipping on Acer Iconia W500 (AMD C-50 APU)

[Felix Kuehling <felix.kuehling@amd.com>]

On 12-02-28 09:40 AM, Mario Kleiner wrote:
>
> Ok, you had a larger test set of machines and more specific test cases
> for this problem, i'm convinced. Thanks for all the testing.
> You have my...
>
> Reviewed-by: Mario Kleiner <mario.kleiner@tuebingen.mpg.de>

Thanks. Is there anything else I need to do to get this into drm-next?

>
> Wrt. to that new CRTC_ADVANCED_START_LINE_POSITION register on >=
> DCE4.1 that Alex found. Seems its default setting of 0x4 is the reason
> for the flicker threshold at vpos -4. Maybe it would by worth trying
> for the W500 tablet or devices/modes with similar short vblank
> intervals to reprogram that register with 0? That would give more
> headroom and maybe reduce your 25% number of deferred flips? Or is
> this likely to cause some hw trouble or artifacts because some line
> buffer can't fetch pixel data fast enough?

I'll ask our display team for advice.

Regards,
  Felix

>
> best,
> -mario
>
>

-- 
 _____    Felix Kuehling
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