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drm/amdgpu: read reg in each iterator of psp_wait_for loop 

v2: fix the SOS loading failure for PSP v3.1

Signed-off-by: Junwei Zhang <Jerry.Zhang@amd.com>
Cc: stable@vger.kernel.org
Acked-by: Alex Deucher <alexander.deucher@amd.com> (v1)
Acked-by: Huang Rui <ray.huang@amd.com> (v1)
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Zhang, Jerry 2017-07-14 18:20:17 +08:00 committed by Alex Deucher
parent be448a4dd4
commit 2890decfd9
2 changed files with 1 additions and 4 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
View File

@ -98,9 +98,8 @@ int psp_wait_for(struct psp_context *psp, uint32_t reg_index,
int i;
struct amdgpu_device *adev = psp->adev;
val = RREG32(reg_index);
for (i = 0; i < adev->usec_timeout; i++) {
val = RREG32(reg_index);
if (check_changed) {
if (val != reg_val)
return 0;

2
drivers/gpu/drm/amd/amdgpu/psp_v3_1.c
View File

@ -237,11 +237,9 @@ int psp_v3_1_bootloader_load_sos(struct psp_context *psp)
/* there might be handshake issue with hardware which needs delay */
mdelay(20);
#if 0
ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_81),
RREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_81),
0, true);
#endif
return ret;
}