diff options
| author | Wayne Lin <Wayne.Lin@amd.com> | 2025-04-25 14:44:02 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-05-22 14:29:46 +0200 |
| commit | 2d125a1f0d61bf224ed7fe6ce2f4f7d4f37b4c61 (patch) | |
| tree | 0b4724f2c4c555f326229a66a326c9377e3168a8 /drivers/fpga/fpga-mgr.c | |
| parent | 8d71c3231b33e24a911b8f2d8c3a17ee40aa32d5 (diff) | |
drm/amd/display: Correct the reply value when AUX write incomplete
commit d433981385c62c72080e26f1c00a961d18b233be upstream.
[Why]
Now forcing aux->transfer to return 0 when incomplete AUX write is
inappropriate. It should return bytes have been transferred.
[How]
aux->transfer is asked not to change original msg except reply field of
drm_dp_aux_msg structure. Copy the msg->buffer when it's write request,
and overwrite the first byte when sink reply 1 byte indicating partially
written byte number. Then we can return the correct value without
changing the original msg.
Fixes: 3637e457eb00 ("drm/amd/display: Fix wrong handling for AUX_DEFER case")
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 7ac37f0dcd2e0b729fa7b5513908dc8ab802b540)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fpga/fpga-mgr.c')
0 files changed, 0 insertions, 0 deletions