6.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alex Deucher <alexander.deucher@xxxxxxx>
commit e3e4bf58bad1576ac732a1429f53e3d4bfb82b4b upstream.
The workaround seems to cause stability issues on other
SDMA 5.2.x IPs.
Fixes: a03ebf116303 ("drm/amdgpu/sdma5.2: Update wptr registers as well as doorbell")
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3556
Acked-by: Ruijing Dong <ruijing.dong@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
(cherry picked from commit 2dc3851ef7d9c5439ea8e9623fc36878f3b40649)
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
@@ -176,14 +176,16 @@ static void sdma_v5_2_ring_set_wptr(stru
DRM_DEBUG("calling WDOORBELL64(0x%08x, 0x%016llx)\n",
ring->doorbell_index, ring->wptr << 2);
WDOORBELL64(ring->doorbell_index, ring->wptr << 2);
- /* SDMA seems to miss doorbells sometimes when powergating kicks in.
- * Updating the wptr directly will wake it. This is only safe because
- * we disallow gfxoff in begin_use() and then allow it again in end_use().
- */
- WREG32(sdma_v5_2_get_reg_offset(adev, ring->me, mmSDMA0_GFX_RB_WPTR),
- lower_32_bits(ring->wptr << 2));
- WREG32(sdma_v5_2_get_reg_offset(adev, ring->me, mmSDMA0_GFX_RB_WPTR_HI),
- upper_32_bits(ring->wptr << 2));
+ if (amdgpu_ip_version(adev, SDMA0_HWIP, 0) == IP_VERSION(5, 2, 1)) {
+ /* SDMA seems to miss doorbells sometimes when powergating kicks in.
+ * Updating the wptr directly will wake it. This is only safe because
+ * we disallow gfxoff in begin_use() and then allow it again in end_use().
+ */
+ WREG32(sdma_v5_2_get_reg_offset(adev, ring->me, mmSDMA0_GFX_RB_WPTR),
+ lower_32_bits(ring->wptr << 2));
+ WREG32(sdma_v5_2_get_reg_offset(adev, ring->me, mmSDMA0_GFX_RB_WPTR_HI),
+ upper_32_bits(ring->wptr << 2));
+ }
} else {
DRM_DEBUG("Not using doorbell -- "
"mmSDMA%i_GFX_RB_WPTR == 0x%08x "
