From ac06b4cfd78b79ec6c8306062801a4276a3e0c79 Mon Sep 17 00:00:00 2001 From: Rex Zhu Date: Thu, 17 May 2018 15:58:53 +0800 Subject: [PATCH] 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: Alex Deucher Signed-off-by: Rex Zhu Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/soc15_common.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/soc15_common.h b/drivers/gpu/drm/amd/amdgpu/soc15_common.h index def865067edd..0942f492d2e1 100644 --- a/drivers/gpu/drm/amd/amdgpu/soc15_common.h +++ b/drivers/gpu/drm/amd/amdgpu/soc15_common.h @@ -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