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drm/amd/display: Copy AUX read reply data whenever length > 0

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[Why]
amdgpu_dm_process_dmub_aux_transfer_sync() should return all exact data
reply from the sink side. Don't do the analysis job in it.

[How]
Remove unnecessary check condition AUX_TRANSACTION_REPLY_AUX_ACK.

Fixes: ead08b95fa ("drm/amd/display: Fix race condition in DPIA AUX transfer")
Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Ray Wu <ray.wu@amd.com>
Signed-off-by: Wayne Lin <Wayne.Lin@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 9b540e3fe6)
Cc: stable@vger.kernel.org
This commit is contained in:
Wayne Lin
2025-04-20 17:50:03 +08:00
committed by Alex Deucher
parent 396dc51b3b
commit 3924f45d4d
1 changed files with 1 additions and 2 deletions
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drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+1 -2
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@@ -12763,8 +12763,7 @@ int amdgpu_dm_process_dmub_aux_transfer_sync(
/* The reply is stored in the top nibble of the command. */
payload->reply[0] = (adev->dm.dmub_notify->aux_reply.command >> 4) & 0xF;
if (!payload->write && p_notify->aux_reply.length &&
(payload->reply[0] == AUX_TRANSACTION_REPLY_AUX_ACK))
if (!payload->write && p_notify->aux_reply.length)
memcpy(payload->data, p_notify->aux_reply.data,
p_notify->aux_reply.length);