From: Alex Deucher Date: Fri, 22 Nov 2024 16:24:13 +0000 (-0500) Subject: drm/amdgpu/hdp5.2: do a posting read when flushing HDP X-Git-Tag: v6.13-rc2~14^2^2~16 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f756dbac1ce1d5f9a2b35e3b55fa429cf6336437;p=thirdparty%2Fkernel%2Flinux.git drm/amdgpu/hdp5.2: 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_v5_2.c b/drivers/gpu/drm/amd/amdgpu/hdp_v5_2.c index 29c3484ae1f16..f52552c5fa27b 100644 --- a/drivers/gpu/drm/amd/amdgpu/hdp_v5_2.c +++ b/drivers/gpu/drm/amd/amdgpu/hdp_v5_2.c @@ -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,