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drm/amdgpu/hdp7.0: do a posting read when flushing HDP

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commit 689275140c upstream.

Need to read back to make sure the write goes through.

Cc: David Belanger <david.belanger@amd.com>
Reviewed-by: Frank Min <frank.min@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Deucher
2024-11-28 16:05:24 +08:00
committed by Greg Kroah-Hartman
parent c99261fa72
commit 8499665f2c
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/amd/amdgpu/hdp_v7_0.c
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@@ -31,10 +31,12 @@
static void hdp_v7_0_flush_hdp(struct amdgpu_device *adev,
struct amdgpu_ring *ring)
{
if (!ring || !ring->funcs->emit_wreg)
if (!ring || !ring->funcs->emit_wreg) {
WREG32((adev->rmmio_remap.reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL) >> 2, 0);
else
RREG32((adev->rmmio_remap.reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL) >> 2);
} else {
amdgpu_ring_emit_wreg(ring, (adev->rmmio_remap.reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL) >> 2, 0);
}
}
static void hdp_v7_0_update_clock_gating(struct amdgpu_device *adev,