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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>
hifive-unleashed-5.1
Ken Wang 2017-07-04 13:11:52 +08:00 committed by Alex Deucher
parent 4426826c02
commit 47ed4e1c93
2 changed files with 17 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View File

@ -1687,6 +1687,8 @@ struct amdgpu_device {
bool has_hw_reset;
u8 reset_magic[AMDGPU_RESET_MAGIC_NUM];
/* record last mm index being written through WREG32*/
unsigned long last_mm_index;
};
static inline struct amdgpu_device *amdgpu_ttm_adev(struct ttm_bo_device *bdev)

15
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View File

@ -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);
}
}
/**