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Revert "drm/amd: Keep display off while going into S4"

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commit 68bfdc8dc0 ("drm/amd: Keep display off while going into S4")
attempted to keep displays off during the S4 sequence by not resuming
display IP.  This however leads to hangs because DRM clients such as the
console can try to access registers and cause a hang.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4155
Fixes: 68bfdc8dc0 ("drm/amd: Keep display off while going into S4")
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://lore.kernel.org/r/20250522141328.115095-1-mario.limonciello@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit e485502c37)
Cc: stable@vger.kernel.org
This commit is contained in:
Mario Limonciello 2025-05-22 09:13:28 -05:00 committed by Alex Deucher
parent a5806cd506
commit 7e7cb7a13c
1 changed files with 0 additions and 5 deletions
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5
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -3469,11 +3469,6 @@ static int dm_resume(struct amdgpu_ip_block *ip_block)
return 0;
}
/* leave display off for S4 sequence */
if (adev->in_s4)
return 0;
/* Recreate dc_state - DC invalidates it when setting power state to S3. */
dc_state_release(dm_state->context);
dm_state->context = dc_state_create(dm->dc, NULL);