Bug 110579

Summary: [CI][SHARDS] igt@kms_plane_cursor@pipe-[abc]-(overlay|viewport)-size-(64|128|256) - fail - Failed assertion: !mismatch
Product: DRI Reporter: Martin Peres <martin.peres>
Component: DRM/IntelAssignee: Ville Syrjala <ville.syrjala>
Status: CLOSED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: high CC: intel-gfx-bugs
Version: XOrg git   
Hardware: Other   
OS: All   
Whiteboard: ReadyForDev
i915 platform: ICL i915 features: display/Other

Description Martin Peres 2019-05-02 07:03:24 UTC
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6021/shard-iclb1/igt@kms_plane_cursor@pipe-b-overlay-size-256.html

Starting subtest: pipe-B-overlay-size-256
(kms_plane_cursor:1846) igt_debugfs-CRITICAL: Test assertion failure function igt_assert_crc_equal, file ../lib/igt_debugfs.c:419:
(kms_plane_cursor:1846) igt_debugfs-CRITICAL: Failed assertion: !mismatch

Introduced by:
09b25812db10 drm/i915: Enable pipe HDR mode on ICL if only HDR planes are used
9b11215e40c5 drm/i915: Flatten and rename haswell_set_pipemisc()
Comment 1 Martin Peres 2019-05-02 07:04:11 UTC
Assigning Ville, since he introduced the regression.
Comment 2 CI Bug Log 2019-05-02 07:04:29 UTC
The CI Bug Log issue associated to this bug has been updated.

### New filters associated

* ICL: igt@kms_plane_cursor@pipe-[abc]-(overlay|viewport)-size-(64|128|256) - fail - Failed assertion: !mismatch
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_272/fi-icl-u3/igt@kms_plane_cursor@pipe-a-overlay-size-256.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_272/fi-icl-u3/igt@kms_plane_cursor@pipe-a-viewport-size-64.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_272/fi-icl-u3/igt@kms_plane_cursor@pipe-b-overlay-size-64.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_272/fi-icl-u3/igt@kms_plane_cursor@pipe-c-overlay-size-64.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_272/fi-icl-u3/igt@kms_plane_cursor@pipe-a-overlay-size-128.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_272/fi-icl-u3/igt@kms_plane_cursor@pipe-b-overlay-size-256.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_272/fi-icl-u3/igt@kms_plane_cursor@pipe-c-viewport-size-256.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_272/fi-icl-u3/igt@kms_plane_cursor@pipe-c-viewport-size-128.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_272/fi-icl-u3/igt@kms_plane_cursor@pipe-b-viewport-size-128.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_272/fi-icl-u3/igt@kms_plane_cursor@pipe-a-overlay-size-64.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_272/fi-icl-y/igt@kms_plane_cursor@pipe-a-overlay-size-256.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_272/fi-icl-y/igt@kms_plane_cursor@pipe-a-viewport-size-64.html
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  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_272/fi-icl-y/igt@kms_plane_cursor@pipe-b-overlay-size-128.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/drmtip_272/fi-icl-y/igt@kms_plane_cursor@pipe-b-viewport-size-64.html
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  - https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_12919/shard-iclb1/igt@kms_plane_cursor@pipe-b-overlay-size-256.html
  - https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_12919/shard-iclb2/igt@kms_plane_cursor@pipe-b-overlay-size-128.html
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Comment 3 Ville Syrjala 2019-05-02 18:37:44 UTC
Rock, meet hardplace. Gamma is fixed by the HDR_MODE bit but that means the crc from a hdr plane no longer matches the crc from a sdr/cursor plane. These tests all try to compare software rendered reference from the primary plane (which is a hdr plane) with hardware generated results from the cursor or sdr plane.

Unless there's yet another unknown chicken bit we can poke I don't think we can fix this if we want to keep HDR_MODE enabled. We might just have to change the tests to grab the reference using an sdr plane. That unfortunately means adding more platform specific knowledge to the tests :(
Comment 4 Ville Syrjala 2019-05-03 12:28:05 UTC
Wasn't hard to fix actually:
https://patchwork.freedesktop.org/series/60233/

Also cooked up a related igt change to detect the other regression fixed by the above i915 series:
https://patchwork.freedesktop.org/series/60234/
Comment 5 Ville Syrjala 2019-05-03 16:25:09 UTC
commit b7ffc4a839a553b07b34543684e79526f2ffecb8
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date:   Thu May 2 23:06:07 2019 +0300

    drm/i915: Allow ICL pipe "HDR mode" when the cursor is visible
Comment 6 Lakshmi 2019-09-30 13:12:30 UTC
(In reply to Ville Syrjala from comment #5)
> commit b7ffc4a839a553b07b34543684e79526f2ffecb8
> Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Date:   Thu May 2 23:06:07 2019 +0300
> 
>     drm/i915: Allow ICL pipe "HDR mode" when the cursor is visible

This issue used to reproduce 100% till CI_DRM_6039 but not seen later. Current CI_DRM run is 6973, closing and archiving the issue.
Comment 7 CI Bug Log 2019-09-30 13:12:41 UTC
The CI Bug Log issue associated to this bug has been archived.

New failures matching the above filters will not be associated to this bug anymore.

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