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drm/amd/display: Align the returned error code with legacy DP

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commit bfe79f5fff upstream.

[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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wayne Lin 2024-01-02 14:20:37 +08:00 committed by Greg Kroah-Hartman
parent fbc4ee5ca7
commit d3af41be09
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
View File

@ -956,6 +956,11 @@ 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);
}