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Commit ac06b4cf authored by Rex Zhu's avatar Rex Zhu Committed by Alex Deucher
Browse files

drm/amdgpu: Add SOC15_WAIT_ON_RREG macro define 



Add new macro to wait on a register field to be a specific
value.

Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarRex Zhu <Rex.Zhu@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 8dbb8cdf

drivers/gpu/drm/amd/amdgpu/soc15_common.h

+15 −0
Original line number Diff line number Diff line
@@ -47,6 +47,21 @@ 
#define WREG32_SOC15_OFFSET(ip, inst, reg, offset, value) \

	WREG32((adev->reg_offset[ip##_HWIP][inst][reg##_BASE_IDX] + reg) + offset, value)



#define SOC15_WAIT_ON_RREG(ip, inst, reg, expected_value, mask, ret) \

	do {							\

		uint32_t tmp_ = RREG32(adev->reg_offset[ip##_HWIP][inst][reg##_BASE_IDX] + reg); \

		uint32_t loop = adev->usec_timeout;		\

		while ((tmp_ & (mask)) != (expected_value)) {	\

			udelay(2);				\

			tmp_ = RREG32(adev->reg_offset[ip##_HWIP][inst][reg##_BASE_IDX] + reg); \

			loop--;					\

			if (!loop) {				\

				ret = -ETIMEDOUT;		\

				break;				\

			}					\

		}						\

	} while (0)



#endif