the UMC_STATUS register is not liner, adjust offset
calculation formula to get correct address
Change-Id: Ic8926078301848330babf289c4238dc8cbcf313d
Signed-off-by: Stanley.Yang <stanley.y...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/umc_v6_7.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c
b/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c
index e613511e07e1..87e4ef18e151 100644
--- a/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c
+++ b/drivers/gpu/drm/amd/amdgpu/umc_v6_7.c
@@ -47,6 +47,13 @@ static inline uint32_t get_umc_v6_7_reg_offset(struct
amdgpu_device *adev,
uint32_t umc_inst,
uint32_t ch_inst)
{
+ uint32_t index = umc_inst * adev->umc.channel_inst_num + ch_inst;
+
+ /* adjust umc and channel index offset,
+ * the register address is not linear on each umc instace */
+ umc_inst = index / 4;
+ ch_inst = index % 4;
+
return adev->umc.channel_offs * ch_inst + UMC_V6_7_INST_DIST * umc_inst;
}
--
2.17.1
