[AMD Official Use Only - General]
Reviewed-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Regards,
Hawking
-----Original Message-----
From: Lazar, Lijo <Lijo.Lazar@xxxxxxx>
Sent: Thursday, July 20, 2023 13:56
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Zhang, Hawking <Hawking.Zhang@xxxxxxx>; Deucher, Alexander <Alexander.Deucher@xxxxxxx>; Zhang, Morris <Shiwu.Zhang@xxxxxxx>
Subject: [PATCH] drm/amdgpu: Program xcp_ctl registers as needed
XCP_CTL register is expected to be programmed by firmware. Under certain conditions FW may not have programmed it correctly. As a workaround, program it when FW has not programmed the right values.
Signed-off-by: Lijo Lazar <lijo.lazar@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
index 738226ed6e50..c567be88c47d 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
@@ -621,7 +621,7 @@ static int gfx_v9_4_3_switch_compute_partition(struct amdgpu_device *adev,
int num_xccs_per_xcp)
{
int ret, i, num_xcc;
- u32 tmp = 0;
+ u32 tmp = 0, regval;
if (adev->psp.funcs) {
ret = psp_spatial_partition(&adev->psp, @@ -629,23 +629,24 @@ static int gfx_v9_4_3_switch_compute_partition(struct amdgpu_device *adev,
num_xccs_per_xcp);
if (ret)
return ret;
- } else {
- num_xcc = NUM_XCC(adev->gfx.xcc_mask);
+ }
+
+ num_xcc = NUM_XCC(adev->gfx.xcc_mask);
- for (i = 0; i < num_xcc; i++) {
- tmp = REG_SET_FIELD(tmp, CP_HYP_XCP_CTL, NUM_XCC_IN_XCP,
- num_xccs_per_xcp);
- tmp = REG_SET_FIELD(tmp, CP_HYP_XCP_CTL, VIRTUAL_XCC_ID,
- i % num_xccs_per_xcp);
+ for (i = 0; i < num_xcc; i++) {
+ tmp = REG_SET_FIELD(tmp, CP_HYP_XCP_CTL, NUM_XCC_IN_XCP,
+ num_xccs_per_xcp);
+ tmp = REG_SET_FIELD(tmp, CP_HYP_XCP_CTL, VIRTUAL_XCC_ID,
+ i % num_xccs_per_xcp);
+ regval = RREG32_SOC15(GC, GET_INST(GC, i), regCP_HYP_XCP_CTL);
+ if (regval != tmp)
WREG32_SOC15(GC, GET_INST(GC, i), regCP_HYP_XCP_CTL,
tmp);
- }
- ret = 0;
}
adev->gfx.num_xcc_per_xcp = num_xccs_per_xcp;
- return ret;
+ return 0;
}
static int gfx_v9_4_3_ih_to_xcc_inst(struct amdgpu_device *adev, int ih_node)
--
2.25.1
