diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c index cff0fd27762e..3836acc2e95e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c @@ -1883,8 +1883,15 @@ static ssize_t psp_usbc_pd_fw_sysfs_write(struct device *dev, memcpy_toio(cpu_addr, usbc_pd_fw->data, usbc_pd_fw->size); - /*TODO Remove once PSP starts snooping CPU cache */ + /* + * x86 specific workaround. + * Without it the buffer is invisible in PSP. + * + * TODO Remove once PSP starts snooping CPU cache + */ +#ifdef CONFIG_X86 clflush_cache_range(cpu_addr, (usbc_pd_fw->size & ~(L1_CACHE_BYTES - 1))); +#endif mutex_lock(&adev->psp.mutex); ret = psp_load_usbc_pd_fw(&adev->psp, dma_addr); |