Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | FAILED: Patch "drm/amd/display: Align the returned error code with legacy DP" failed to apply to 6.1-stable tree | Date | Wed, 27 Mar 2024 08:14:11 -0400 |
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The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@vger.kernel.org>.
Thanks, Sasha
------------------ original commit in Linus's tree ------------------
From 3b84525544be4ca0481110263a6d73eb00741cf3 Mon Sep 17 00:00:00 2001 From: Wayne Lin <Wayne.Lin@amd.com> Date: Tue, 2 Jan 2024 14:20:37 +0800 Subject: [PATCH] drm/amd/display: Align the returned error code with legacy DP
[Why] For usb4 connector, AUX transaction is handled by dmub utilizing a differnt code path comparing to legacy DP connector. If the usb4 DP connector is disconnected, AUX access will report EBUSY and cause igt@kms_dp_aux_dev fail.
[How] Align the error code with the one reported by legacy DP as EIO.
Cc: Mario Limonciello <mario.limonciello@amd.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org Acked-by: Alex Hung <alex.hung@amd.com> Signed-off-by: Wayne Lin <Wayne.Lin@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c index eaf8d9f482446..85b7f58a7f35a 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -979,6 +979,11 @@ int dm_helper_dmub_aux_transfer_sync( struct aux_payload *payload, enum aux_return_code_type *operation_result) { + if (!link->hpd_status) { + *operation_result = AUX_RET_ERROR_HPD_DISCON; + return -1; + } + return amdgpu_dm_process_dmub_aux_transfer_sync(ctx, link->link_index, payload, operation_result); } -- 2.43.0
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