Add vcn harware and firmware synchronization to fix race condition issue among vcn driver, hardware and firmware v2: WA: Add scratch 3 to sync with vcn firmware during W/R pointer reset Signed-off-by: James Zhu <James.Zhu@xxxxxxx> --- drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c b/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c index 2d64ba1..9480039 100644 --- a/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c +++ b/drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c @@ -1034,6 +1034,9 @@ static int vcn_v2_5_start(struct amdgpu_device *adev) tmp = REG_SET_FIELD(tmp, UVD_RBC_RB_CNTL, RB_RPTR_WR_EN, 1); WREG32_SOC15(UVD, i, mmUVD_RBC_RB_CNTL, tmp); + /* Set scratch3 to start dec/enc registers reset */ + WREG32_SOC15(UVD, i, mmUVD_SCRATCH3, 1); + /* programm the RB_BASE for ring buffer */ WREG32_SOC15(UVD, i, mmUVD_LMI_RBC_RB_64BIT_BAR_LOW, lower_32_bits(ring->gpu_addr)); @@ -1059,6 +1062,9 @@ static int vcn_v2_5_start(struct amdgpu_device *adev) WREG32_SOC15(UVD, i, mmUVD_RB_BASE_LO2, ring->gpu_addr); WREG32_SOC15(UVD, i, mmUVD_RB_BASE_HI2, upper_32_bits(ring->gpu_addr)); WREG32_SOC15(UVD, i, mmUVD_RB_SIZE2, ring->ring_size / 4); + + /* Clear scratch3 to finish dec/enc registers reset */ + WREG32_SOC15(UVD, i, mmUVD_SCRATCH3, 0); } return 0; @@ -1388,8 +1394,11 @@ static int vcn_v2_5_pause_dpg_mode(struct amdgpu_device *adev, UVD_DPG_PAUSE__NJ_PAUSE_DPG_ACK_MASK, UVD_DPG_PAUSE__NJ_PAUSE_DPG_ACK_MASK, ret_code); + /* Stall DPG before WPTR/RPTR reset */ + WREG32_P(SOC15_REG_OFFSET(UVD, inst_idx, mmUVD_POWER_STATUS), UVD_POWER_STATUS__STALL_DPG_POWER_UP_MASK, ~UVD_POWER_STATUS__STALL_DPG_POWER_UP_MASK); /* Restore */ ring = &adev->vcn.inst[inst_idx].ring_enc[0]; + ring->wptr = 0; WREG32_SOC15(UVD, inst_idx, mmUVD_RB_BASE_LO, ring->gpu_addr); WREG32_SOC15(UVD, inst_idx, mmUVD_RB_BASE_HI, upper_32_bits(ring->gpu_addr)); WREG32_SOC15(UVD, inst_idx, mmUVD_RB_SIZE, ring->ring_size / 4); @@ -1397,6 +1406,7 @@ static int vcn_v2_5_pause_dpg_mode(struct amdgpu_device *adev, WREG32_SOC15(UVD, inst_idx, mmUVD_RB_WPTR, lower_32_bits(ring->wptr)); ring = &adev->vcn.inst[inst_idx].ring_enc[1]; + ring->wptr = 0; WREG32_SOC15(UVD, inst_idx, mmUVD_RB_BASE_LO2, ring->gpu_addr); WREG32_SOC15(UVD, inst_idx, mmUVD_RB_BASE_HI2, upper_32_bits(ring->gpu_addr)); WREG32_SOC15(UVD, inst_idx, mmUVD_RB_SIZE2, ring->ring_size / 4); @@ -1405,6 +1415,8 @@ static int vcn_v2_5_pause_dpg_mode(struct amdgpu_device *adev, WREG32_SOC15(UVD, inst_idx, mmUVD_RBC_RB_WPTR, RREG32_SOC15(UVD, inst_idx, mmUVD_SCRATCH2) & 0x7FFFFFFF); + /* Unstall DPG */ + WREG32_P(SOC15_REG_OFFSET(UVD, inst_idx, mmUVD_POWER_STATUS), 0, ~UVD_POWER_STATUS__STALL_DPG_POWER_UP_MASK); SOC15_WAIT_ON_RREG(UVD, inst_idx, mmUVD_POWER_STATUS, UVD_PGFSM_CONFIG__UVDM_UVDU_PWR_ON, UVD_POWER_STATUS__UVD_POWER_STATUS_MASK, ret_code); -- 2.7.4 _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
