Commit 1915a433 authored by Stanley.Yang's avatar Stanley.Yang Committed by Alex Deucher
Browse files

drm/amdgpu: adjust register address calculation 



the UMC_STATUS register is not linear, adjust offset
calculation formula to get correct address

Signed-off-by: default avatarStanley.Yang <Stanley.Yang@amd.com>
Reviewed-by: default avatarTao Zhou <tao.zhou1@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent f3986e86

drivers/gpu/drm/amd/amdgpu/umc_v6_7.c

+7 −0
Original line number Diff line number Diff line
@@ -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;

}