diff options
| author | Wayne Lin <Wayne.Lin@amd.com> | 2025-04-20 11:56:54 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-05-05 20:01:50 +0300 |
| commit | 81b5c6fa62af62fe89ae9576f41aae37830b94cb (patch) | |
| tree | 6b44c99b3d3c6ac942678eadf81af63b7bf3d32a | |
| parent | 1db6c9e9b62e1a8912f0a281c941099fca678da3 (diff) | |
| download | linux-81b5c6fa62af62fe89ae9576f41aae37830b94cb.tar.xz | |
drm/amd/display: Remove incorrect checking in dmub aux handler
[Why & How]
"Request length != reply length" is expected behavior defined in spec.
It's not an invalid reply. Besides, replied data handling logic is not
designed to be written in amdgpu_dm_process_dmub_aux_transfer_sync().
Remove the incorrectly handling section.
Fixes: ead08b95fa50 ("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>
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 |
1 files changed, 1 insertions, 11 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 2c4cae5e1a20..7e41f99e9e26 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -12854,19 +12854,9 @@ int amdgpu_dm_process_dmub_aux_transfer_sync( 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->length != p_notify->aux_reply.length) { - drm_warn(adev_to_drm(adev), "invalid read length %d from DPIA AUX 0x%x(%d)!\n", - p_notify->aux_reply.length, - payload->address, payload->length); - *operation_result = AUX_RET_ERROR_INVALID_REPLY; - goto out; - } - + (payload->reply[0] == AUX_TRANSACTION_REPLY_AUX_ACK)) memcpy(payload->data, p_notify->aux_reply.data, p_notify->aux_reply.length); - } /* success */ ret = p_notify->aux_reply.length; |