This is a note to let you know that I've just added the patch titled
drm/amd/display: fix bandwidth validation failure on DCN 2.1
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-fix-bandwidth-validation-failure-on-dcn-2.1.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3a0fa3bc245ef92838a8296e0055569b8dff94c4 Mon Sep 17 00:00:00 2001
From: Melissa Wen <mwen@xxxxxxxxxx>
Date: Fri, 29 Dec 2023 15:25:00 -0100
Subject: drm/amd/display: fix bandwidth validation failure on DCN 2.1
From: Melissa Wen <mwen@xxxxxxxxxx>
commit 3a0fa3bc245ef92838a8296e0055569b8dff94c4 upstream.
IGT `amdgpu/amd_color/crtc-lut-accuracy` fails right at the beginning of
the test execution, during atomic check, because DC rejects the
bandwidth state for a fb sizing 64x64. The test was previously working
with the deprecated dc_commit_state(). Now using
dc_validate_with_context() approach, the atomic check needs to perform a
full state validation. Therefore, set fast_validation to false in the
dc_validate_global_state call for atomic check.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: b8272241ff9d ("drm/amd/display: Drop dc_commit_state in favor of dc_commit_streams")
Signed-off-by: Melissa Wen <mwen@xxxxxxxxxx>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -10400,7 +10400,7 @@ static int amdgpu_dm_atomic_check(struct
DRM_DEBUG_DRIVER("drm_dp_mst_atomic_check() failed\n");
goto fail;
}
- status = dc_validate_global_state(dc, dm_state->context, true);
+ status = dc_validate_global_state(dc, dm_state->context, false);
if (status != DC_OK) {
DRM_DEBUG_DRIVER("DC global validation failure: %s (%d)",
dc_status_to_str(status), status);
Patches currently in stable-queue which might be from mwen@xxxxxxxxxx are
queue-6.6/drm-amd-display-fix-bandwidth-validation-failure-on-dcn-2.1.patch
