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| author | Ken Wang <Ken.Wang@amd.com> | 2017-07-04 13:11:52 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-07-14 11:06:06 -0400 |
| commit | 47ed4e1c93a6c73f313022369c12ddd693890715 (patch) | |
| tree | 3e822ce6750a35088368b8134a15353a82dc01c2 /drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | |
| parent | 4426826c02dc367ec3c245ef5c5ca4dcdb45b4c8 (diff) | |
| download | linux-47ed4e1c93a6c73f313022369c12ddd693890715.tar.gz linux-47ed4e1c93a6c73f313022369c12ddd693890715.tar.xz | |
drm/amdgpu: add workaround for S3 issues on some vega10 boards
Certain MC registers need a delay after writing them to properly
update in the init sequence.
Signed-off-by: Ken Wang <Ken.Wang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_device.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 7963c54e5d03..8ce522b490c8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -129,6 +129,10 @@ void amdgpu_mm_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v, { trace_amdgpu_mm_wreg(adev->pdev->device, reg, v); + if (adev->asic_type >= CHIP_VEGA10 && reg == 0) { + adev->last_mm_index = v; + } + if (!(acc_flags & AMDGPU_REGS_NO_KIQ) && amdgpu_sriov_runtime(adev)) { BUG_ON(in_interrupt()); return amdgpu_virt_kiq_wreg(adev, reg, v); @@ -144,6 +148,10 @@ void amdgpu_mm_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v, writel(v, ((void __iomem *)adev->rmmio) + (mmMM_DATA * 4)); spin_unlock_irqrestore(&adev->mmio_idx_lock, flags); } + + if (adev->asic_type >= CHIP_VEGA10 && reg == 1 && adev->last_mm_index == 0x5702C) { + udelay(500); + } } u32 amdgpu_io_rreg(struct amdgpu_device *adev, u32 reg) @@ -158,6 +166,9 @@ u32 amdgpu_io_rreg(struct amdgpu_device *adev, u32 reg) void amdgpu_io_wreg(struct amdgpu_device *adev, u32 reg, u32 v) { + if (adev->asic_type >= CHIP_VEGA10 && reg == 0) { + adev->last_mm_index = v; + } if ((reg * 4) < adev->rio_mem_size) iowrite32(v, adev->rio_mem + (reg * 4)); @@ -165,6 +176,10 @@ void amdgpu_io_wreg(struct amdgpu_device *adev, u32 reg, u32 v) iowrite32((reg * 4), adev->rio_mem + (mmMM_INDEX * 4)); iowrite32(v, adev->rio_mem + (mmMM_DATA * 4)); } + + if (adev->asic_type >= CHIP_VEGA10 && reg == 1 && adev->last_mm_index == 0x5702C) { + udelay(500); + } } /** |