[AMD Official Use Only - General] Reviewed-by: Emily Deng <emily.d...@amd.com>
>-----Original Message----- >From: amd-gfx <amd-gfx-boun...@lists.freedesktop.org> On Behalf Of Horace >Chen >Sent: Tuesday, June 20, 2023 9:30 PM >To: amd-gfx@lists.freedesktop.org >Cc: Andrey Grodzovsky <andrey.grodzov...@amd.com>; Xiao, Jack ><jack.x...@amd.com>; Xu, Feifei <feifei...@amd.com>; Chen, Horace ><horace.c...@amd.com>; Chang, HaiJun <haijun.ch...@amd.com>; >Deucher, Alexander <alexander.deuc...@amd.com>; Quan, Evan ><evan.q...@amd.com>; Koenig, Christian <christian.koe...@amd.com>; Liu, >Monk <monk....@amd.com>; Zhang, Hawking <hawking.zh...@amd.com> >Subject: [PATCH] drm/amdgpu: Clear VCN cache when hw_init > >[Why] >VCN will use some framebuffer space as its cache. It needs to be reset when >reset happens, such as FLR. Otherwise some error may be kept after the reset. > >Signed-off-by: Horace Chen <horace.c...@amd.com> >--- > drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c | 3 +++ > 1 file changed, 3 insertions(+) > >diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c >b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c >index b48bb5212488..2db73a964031 100644 >--- a/drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c >+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c >@@ -1292,6 +1292,7 @@ static int vcn_v4_0_start_sriov(struct >amdgpu_device *adev) > cache_size); > > cache_addr = adev->vcn.inst[i].gpu_addr + offset; >+ memset(adev->vcn.inst[i].cpu_addr + offset, 0, >+AMDGPU_VCN_STACK_SIZE); > > MMSCH_V4_0_INSERT_DIRECT_WT(SOC15_REG_OFFSET(VCN, i, > regUVD_LMI_VCPU_CACHE1_64BIT_BAR_LOW), > lower_32_bits(cache_addr)); >@@ -1307,6 +1308,8 @@ static int vcn_v4_0_start_sriov(struct >amdgpu_device *adev) > > cache_addr = adev->vcn.inst[i].gpu_addr + offset + > AMDGPU_VCN_STACK_SIZE; >+ memset(adev->vcn.inst[i].cpu_addr + offset + >AMDGPU_VCN_STACK_SIZE, 0, >+ AMDGPU_VCN_STACK_SIZE); > > MMSCH_V4_0_INSERT_DIRECT_WT(SOC15_REG_OFFSET(VCN, i, > regUVD_LMI_VCPU_CACHE2_64BIT_BAR_LOW), > lower_32_bits(cache_addr)); >-- >2.34.1
