From: Alex Deucher Date: Fri, 22 Nov 2024 16:22:51 +0000 (-0500) Subject: drm/amdgpu/hdp4.0: do a posting read when flushing HDP X-Git-Tag: v6.13-rc2~14^2^2~18 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c9b8dcabb52afe88413ff135a0953e3cc4128483;p=thirdparty%2Fkernel%2Flinux.git drm/amdgpu/hdp4.0: do a posting read when flushing HDP Need to read back to make sure the write goes through. Cc: David Belanger Reviewed-by: Frank Min Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- diff --git a/drivers/gpu/drm/amd/amdgpu/hdp_v4_0.c b/drivers/gpu/drm/amd/amdgpu/hdp_v4_0.c index e019249883fb2..194026e9be333 100644 --- a/drivers/gpu/drm/amd/amdgpu/hdp_v4_0.c +++ b/drivers/gpu/drm/amd/amdgpu/hdp_v4_0.c @@ -40,10 +40,12 @@ static void hdp_v4_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_v4_0_invalidate_hdp(struct amdgpu_device *adev, @@ -54,11 +56,13 @@ static void hdp_v4_0_invalidate_hdp(struct amdgpu_device *adev, amdgpu_ip_version(adev, HDP_HWIP, 0) == IP_VERSION(4, 4, 5)) return; - if (!ring || !ring->funcs->emit_wreg) + if (!ring || !ring->funcs->emit_wreg) { WREG32_SOC15_NO_KIQ(HDP, 0, mmHDP_READ_CACHE_INVALIDATE, 1); - else + RREG32_SOC15_NO_KIQ(HDP, 0, mmHDP_READ_CACHE_INVALIDATE); + } else { amdgpu_ring_emit_wreg(ring, SOC15_REG_OFFSET( HDP, 0, mmHDP_READ_CACHE_INVALIDATE), 1); + } } static void hdp_v4_0_query_ras_error_count(struct amdgpu_device *adev,