drm/amd/display: disable CRTCs with NULL FB on their primary plane (V2)

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"drm/atomic: Try to preserve the crtc enabled state in drm_atomic_remove_fb, v2"

introduces a slight behavioral change to rmfb. Instead of disabling a crtc
when the primary plane is disabled, it now preserves it.

This change leads to BUG hit while performing atomic commit on amd driver.

As a fix this patch ensures that we disable the CRTC's with NULL FB by returning
-EINVAL and hence triggering fall back to the old behavior and turning off the
crtc in atomic_remove_fb().

V2: Added error check for plane_state and removed sanity check for crtc.

Signed-off-by: Shirish S <shirish.s@amd.com>
Signed-off-by: Pratik Vishwakarma <Pratik.Vishwakarma@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

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Shirish S 2018-02-28 12:14:58 +05:30 • committed by Alex Deucher

parent 3c27b3f413

commit 36cc549d59

1 changed files with 28 additions and 0 deletions

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drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

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