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drm/amdgpu: perform srbm soft reset always on SDMA resume 

[ Upstream commit 253475c455 ]

This can address the random SDMA hang after pci config reset
seen on Hawaii.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Tested-by: Sandeep Raghuraman <sandy.8925@gmail.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Evan Quan 2020-10-28 15:29:59 +08:00 committed by Greg Kroah-Hartman
parent 7f6df0b085
commit f449b902ba
1 changed files with 12 additions and 15 deletions
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27
drivers/gpu/drm/amd/amdgpu/cik_sdma.c
View File

@ -1071,22 +1071,19 @@ static int cik_sdma_soft_reset(void *handle)
{
u32 srbm_soft_reset = 0;
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
u32 tmp = RREG32(mmSRBM_STATUS2);
u32 tmp;
if (tmp & SRBM_STATUS2__SDMA_BUSY_MASK) {
/* sdma0 */
tmp = RREG32(mmSDMA0_F32_CNTL + SDMA0_REGISTER_OFFSET);
tmp |= SDMA0_F32_CNTL__HALT_MASK;
WREG32(mmSDMA0_F32_CNTL + SDMA0_REGISTER_OFFSET, tmp);
srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_SDMA_MASK;
}
if (tmp & SRBM_STATUS2__SDMA1_BUSY_MASK) {
/* sdma1 */
tmp = RREG32(mmSDMA0_F32_CNTL + SDMA1_REGISTER_OFFSET);
tmp |= SDMA0_F32_CNTL__HALT_MASK;
WREG32(mmSDMA0_F32_CNTL + SDMA1_REGISTER_OFFSET, tmp);
srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_SDMA1_MASK;
}
/* sdma0 */
tmp = RREG32(mmSDMA0_F32_CNTL + SDMA0_REGISTER_OFFSET);
tmp |= SDMA0_F32_CNTL__HALT_MASK;
WREG32(mmSDMA0_F32_CNTL + SDMA0_REGISTER_OFFSET, tmp);
srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_SDMA_MASK;
/* sdma1 */
tmp = RREG32(mmSDMA0_F32_CNTL + SDMA1_REGISTER_OFFSET);
tmp |= SDMA0_F32_CNTL__HALT_MASK;
WREG32(mmSDMA0_F32_CNTL + SDMA1_REGISTER_OFFSET, tmp);
srbm_soft_reset |= SRBM_SOFT_RESET__SOFT_RESET_SDMA1_MASK;
if (srbm_soft_reset) {
tmp = RREG32(mmSRBM_SOFT_RESET);