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| author | David (Ming Qiang) Wu <David.Wu3@amd.com> | 2025-05-12 15:14:43 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-05-29 11:14:08 +0200 |
| commit | 4d83960c6232a53339bed73f19380dd7ad0c1d85 (patch) | |
| tree | b096f9e3ef359ae8a13cba5b0f4accf2107c4411 /drivers/fpga/xilinx-selectmap.c | |
| parent | 3cab53237513beec62414c97b8d4f2be859b66c8 (diff) | |
drm/amdgpu: read back register after written for VCN v4.0.5
commit ee7360fc27d6045510f8fe459b5649b2af27811a upstream.
On VCN v4.0.5 there is a race condition where the WPTR is not
updated after starting from idle when doorbell is used. Adding
register read-back after written at function end is to ensure
all register writes are done before they can be used.
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/12528
Signed-off-by: David (Ming Qiang) Wu <David.Wu3@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Tested-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Ruijing Dong <ruijing.dong@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 07c9db090b86e5211188e1b351303fbc673378cf)
Cc: stable@vger.kernel.org
Tested-by: Eric Naim <dnaim@cachyos.org>
Signed-off-by: Eric Naim <dnaim@cachyos.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fpga/xilinx-selectmap.c')
0 files changed, 0 insertions, 0 deletions