From: Timmy Tsai Date: Thu, 31 Aug 2023 17:31:31 +0000 (-0400) Subject: drm/amd: Add HDP flush during jpeg init X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2fa73a101cd812bceb9d865fee296fc1057541a2;p=linux.git drm/amd: Add HDP flush during jpeg init During jpeg init, CPU writes to frame buffer which can be cached by HDP, occasionally causing invalid header to be sent to MMSCH. Perform HDP flush after writing to frame buffer before continuing with jpeg init sequence. Reviewed-by: Alex Deucher Signed-off-by: Timmy Tsai Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/jpeg_v4_0.c b/drivers/gpu/drm/amd/amdgpu/jpeg_v4_0.c index 98ed49b16e62f..ac614b869aaf5 100644 --- a/drivers/gpu/drm/amd/amdgpu/jpeg_v4_0.c +++ b/drivers/gpu/drm/amd/amdgpu/jpeg_v4_0.c @@ -468,6 +468,9 @@ static int jpeg_v4_0_start_sriov(struct amdgpu_device *adev) table_loc = (uint32_t *)table->cpu_addr; memcpy((void *)table_loc, &header, size); + /* Perform HDP flush before writing to MMSCH registers */ + amdgpu_device_flush_hdp(adev, NULL); + /* message MMSCH (in VCN[0]) to initialize this client * 1, write to mmsch_vf_ctx_addr_lo/hi register with GPU mc addr * of memory descriptor location