diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_device.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index a86e80842df9..5d24b1436b9f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -183,20 +183,25 @@ bool amdgpu_device_supports_baco(struct drm_device *dev) void amdgpu_device_vram_access(struct amdgpu_device *adev, loff_t pos, uint32_t *buf, size_t size, bool write) { - uint64_t last; unsigned long flags; + uint32_t hi = ~0; + uint64_t last; + + spin_lock_irqsave(&adev->mmio_idx_lock, flags); + for (last = pos + size; pos < last; pos += 4) { + uint32_t tmp = pos >> 31; - last = size - 4; - for (last += pos; pos <= last; pos += 4) { - spin_lock_irqsave(&adev->mmio_idx_lock, flags); WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)pos) | 0x80000000); - WREG32_NO_KIQ(mmMM_INDEX_HI, pos >> 31); + if (tmp != hi) { + WREG32_NO_KIQ(mmMM_INDEX_HI, tmp); + hi = tmp; + } if (write) WREG32_NO_KIQ(mmMM_DATA, *buf++); else *buf++ = RREG32_NO_KIQ(mmMM_DATA); - spin_unlock_irqrestore(&adev->mmio_idx_lock, flags); } + spin_unlock_irqrestore(&adev->mmio_idx_lock, flags); } /* |