[Bug 101053] DC R9 285 fullscreen video regression since drm/amd/display: Parse scanline registers

[Bug 101053] DC R9 285 fullscreen video regression since drm/amd/display: Parse scanline registers

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https://bugs.freedesktop.org/show_bug.cgi?id=101053

            Bug ID: 101053
           Summary: DC R9 285 fullscreen video regression since
                    drm/amd/display: Parse scanline registers
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: adf.lists@gmail.com

R9 285 tonga since

commit afbeb2d0961b2139bcf6553a710e6a8ae5d09d34
Author: Sylvia Tsai <sylvia.tsai@amd.com>
Date:   Tue Apr 11 15:15:28 2017 -0400

    drm/amd/display: Parse scanline registers

    They could differ between ASIC generations

    Change-Id: Ia352ae206273fe3a025579554cae4e3711a26fcc

on agd5f drm staging 4.9/11 there is a regression with full screen video.

mpv --vo=vaapi/vdpau/opengl all the same, dropping frames, or playing slowmo
with --framedrop=no

Windowed playback is OK, testing with 60fps vid on 60Hz DVI-D display.

Forcing clocks high does not help.

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[Bug 101053] DC R9 285 fullscreen video regression since drm/amd/display: Parse scanline registers

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https://bugs.freedesktop.org/show_bug.cgi?id=101053

--- Comment #1 from Harry Wentland <harry.wentland@amd.com> ---
Created attachment 131374
  --> https://bugs.freedesktop.org/attachment.cgi?id=131374&action=edit
fix scanline params

Thanks, Andy. Please try attached patch. The regression change you mentioned
contains some bad code (that I wrote -_-).

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[Bug 101053] DC R9 285 fullscreen video regression since drm/amd/display: Parse scanline registers

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https://bugs.freedesktop.org/show_bug.cgi?id=101053

--- Comment #2 from Andy Furniss <adf.lists@gmail.com> ---
That fixes it, thanks.

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[Bug 101053] DC R9 285 fullscreen video regression since drm/amd/display: Parse scanline registers

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https://bugs.freedesktop.org/show_bug.cgi?id=101053

--- Comment #3 from Harry Wentland <harry.wentland@amd.com> ---
Thanks for testing. It should land in amd-staging-4.9 in a week or so.

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[Bug 101053] DC R9 285 fullscreen video regression since drm/amd/display: Parse scanline registers

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https://bugs.freedesktop.org/show_bug.cgi?id=101053

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

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[Bug 101053] DC R9 285 fullscreen video regression since drm/amd/display: Parse scanline registers

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https://bugs.freedesktop.org/show_bug.cgi?id=101053

--- Comment #4 from Andy Furniss <adf.lists@gmail.com> ---
(In reply to Harry Wentland from comment #3)
> Thanks for testing. It should land in amd-staging-4.9 in a week or so.

Closed by Alex, but AFAICT the fix is only in amd-staging-4.11. 4.9 doesn't
seem to have been touched for 4 weeks (unless cgit is wrong).

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[Bug 101053] DC R9 285 fullscreen video regression since drm/amd/display: Parse scanline registers

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https://bugs.freedesktop.org/show_bug.cgi?id=101053

--- Comment #5 from Alex Deucher <alexdeucher@gmail.com> ---
We've moved amd-staging to 4.11 and are not updating the 4.9 branch any more.

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