From: Alex Deucher Date: Thu, 28 Nov 2024 08:05:24 +0000 (+0800) Subject: drm/amdgpu/hdp7.0: do a posting read when flushing HDP X-Git-Tag: v6.13-rc2~14^2^2~14 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=689275140cb8e9f8ae59e545086fce51fb0b994a;p=thirdparty%2Fkernel%2Flinux.git drm/amdgpu/hdp7.0: 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_v7_0.c b/drivers/gpu/drm/amd/amdgpu/hdp_v7_0.c index 1c99bb09e2a12..63820329f67eb 100644 --- a/drivers/gpu/drm/amd/amdgpu/hdp_v7_0.c +++ b/drivers/gpu/drm/amd/amdgpu/hdp_v7_0.c @@ -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,