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drm/amdgpu/hdp5.2: do a posting read when flushing HDP

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BugLink: https://bugs.launchpad.net/bugs/2102118

commit f756dbac1ce1d5f9a2b35e3b55fa429cf6336437 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>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Alex Deucher
2025-03-12 22:51:00 +09:00
committed by Stefan Bader
parent cdfddbf63b
commit 129903f57f
1 changed files with 4 additions and 2 deletions
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drivers/gpu/drm/amd/amdgpu/hdp_v5_2.c
+4 -2
View File
@@ -31,13 +31,15 @@
static void hdp_v5_2_flush_hdp(struct amdgpu_device *adev,
struct amdgpu_ring *ring)
{
if (!ring || !ring->funcs->emit_wreg)
if (!ring || !ring->funcs->emit_wreg) {
WREG32_NO_KIQ((adev->rmmio_remap.reg_offset + KFD_MMIO_REMAP_HDP_MEM_FLUSH_CNTL) >> 2,
0);
else
RREG32_NO_KIQ((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_v5_2_update_mem_power_gating(struct amdgpu_device *adev,