drm/amdgpu: introduce two work mode for imu

IMU has two work mode such as debug mode and mission mode. Current GC
v11_0_0 is using the debug mode.
Acked-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NHuang Rui <ray.huang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -24,6 +24,11 @@
 #ifndef __AMDGPU_IMU_H__
 #define __AMDGPU_IMU_H__
 
+enum imu_work_mode {
+	DEBUG_MODE,
+	MISSION_MODE
+};
+
 struct amdgpu_imu_funcs {
     int (*init_microcode)(struct amdgpu_device *adev);
     int (*load_microcode)(struct amdgpu_device *adev);
@@ -46,6 +51,7 @@ struct imu_rlc_ram_golden {
 
 struct amdgpu_imu {
     const struct amdgpu_imu_funcs *funcs;
+    enum imu_work_mode mode;
 };
 
 #endif

drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c

@@ -6292,6 +6292,7 @@ static void gfx_v11_0_set_irq_funcs(struct amdgpu_device *adev)
 
 static void gfx_v11_0_set_imu_funcs(struct amdgpu_device *adev)
 {
+	adev->gfx.imu.mode = DEBUG_MODE;
 	adev->gfx.imu.funcs = &gfx_v11_0_imu_funcs;
 }
 

drivers/gpu/drm/amd/amdgpu/imu_v11_0.c

@@ -125,9 +125,11 @@ static void imu_v11_0_setup(struct amdgpu_device *adev)
 	WREG32_SOC15(GC, 0, regGFX_IMU_C2PMSG_ACCESS_CTRL0, 0xffffff);
 	WREG32_SOC15(GC, 0, regGFX_IMU_C2PMSG_ACCESS_CTRL1, 0xffff);
 
-	imu_reg_val = RREG32_SOC15(GC, 0, regGFX_IMU_C2PMSG_16);
-	imu_reg_val |= 0x1;
-	WREG32_SOC15(GC, 0, regGFX_IMU_C2PMSG_16, imu_reg_val);
+	if (adev->gfx.imu.mode == DEBUG_MODE) {
+		imu_reg_val = RREG32_SOC15(GC, 0, regGFX_IMU_C2PMSG_16);
+		imu_reg_val |= 0x1;
+		WREG32_SOC15(GC, 0, regGFX_IMU_C2PMSG_16, imu_reg_val);
+	}
 
 	//disble imu Rtavfs, SmsRepair, DfllBTC, and ClkB
 	imu_reg_val = RREG32_SOC15(GC, 0, regGFX_IMU_SCRATCH_10);
@@ -144,16 +146,18 @@ static int imu_v11_0_start(struct amdgpu_device *adev)
 	imu_reg_val &= 0xfffffffe;
 	WREG32_SOC15(GC, 0, regGFX_IMU_CORE_CTRL, imu_reg_val);
 
-	for (i = 0; i < adev->usec_timeout; i++) {
-		imu_reg_val = RREG32_SOC15(GC, 0, regGFX_IMU_GFX_RESET_CTRL);
-		if ((imu_reg_val & 0x1f) == 0x1f)
-			break;
-		udelay(1);
-	}
-
-	if (i >= adev->usec_timeout) {
-		dev_err(adev->dev, "init imu: IMU start timeout\n");
-		return -ETIMEDOUT;
+	if (adev->gfx.imu.mode == DEBUG_MODE) {
+		for (i = 0; i < adev->usec_timeout; i++) {
+			imu_reg_val = RREG32_SOC15(GC, 0, regGFX_IMU_GFX_RESET_CTRL);
+			if ((imu_reg_val & 0x1f) == 0x1f)
+				break;
+			udelay(1);
+		}
+
+		if (i >= adev->usec_timeout) {
+			dev_err(adev->dev, "init imu: IMU start timeout\n");
+			return -ETIMEDOUT;
+		}
 	}
 
 	return 0;