[PATCH 2/2] drm/amd/powerplay: pre-check the SMU state before issuing message

[Evan Quan]

Abort the message issuing if the SMU was not in the right state.

Change-Id: Ida9f911e051f6e78de4f475956c78637e56e6ea3
Signed-off-by: Evan Quan <evan.quan at amd.com>
---
 drivers/gpu/drm/amd/powerplay/smu_v11_0.c | 16 ++++++++--------
 drivers/gpu/drm/amd/powerplay/smu_v12_0.c | 16 ++++++++--------
 2 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
index 325ec4864f90..d84c7f5fb01a 100644
--- a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
+++ b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
@@ -68,15 +68,13 @@ static int smu_v11_0_wait_for_response(struct smu_context *smu)
 	for (i = 0; i < timeout; i++) {
 		cur_value = RREG32_SOC15(MP1, 0, mmMP1_SMN_C2PMSG_90);
 		if ((cur_value & MP1_C2PMSG_90__CONTENT_MASK) != 0)
-			break;
+			return cur_value == 0x1 ? 0 : -EIO;
+
 		udelay(1);
 	}
 
 	/* timeout means wrong logic */
-	if (i == timeout)
-		return -ETIME;
-
-	return RREG32_SOC15(MP1, 0, mmMP1_SMN_C2PMSG_90) == 0x1 ? 0 : -EIO;
+	return -ETIME;
 }
 
 int
@@ -92,9 +90,11 @@ smu_v11_0_send_msg_with_param(struct smu_context *smu,
 		return index;
 
 	ret = smu_v11_0_wait_for_response(smu);
-	if (ret)
-		pr_err("failed send message: %10s (%d) \tparam: 0x%08x response %#x\n",
-		       smu_get_message_name(smu, msg), index, param, ret);
+	if (ret) {
+		pr_err("Msg issuing pre-check failed and "
+		       "SMU may be not in the right state!\n");
+		return ret;
+	}
 
 	WREG32_SOC15(MP1, 0, mmMP1_SMN_C2PMSG_90, 0);
 
diff --git a/drivers/gpu/drm/amd/powerplay/smu_v12_0.c b/drivers/gpu/drm/amd/powerplay/smu_v12_0.c
index 7f5f7e12a41e..a638326ba1b7 100644
--- a/drivers/gpu/drm/amd/powerplay/smu_v12_0.c
+++ b/drivers/gpu/drm/amd/powerplay/smu_v12_0.c
@@ -56,15 +56,13 @@ int smu_v12_0_wait_for_response(struct smu_context *smu)
 	for (i = 0; i < adev->usec_timeout; i++) {
 		cur_value = RREG32_SOC15(MP1, 0, mmMP1_SMN_C2PMSG_90);
 		if ((cur_value & MP1_C2PMSG_90__CONTENT_MASK) != 0)
-			break;
+			return cur_value == 0x1 ? 0 : -EIO;
+
 		udelay(1);
 	}
 
 	/* timeout means wrong logic */
-	if (i == adev->usec_timeout)
-		return -ETIME;
-
-	return RREG32_SOC15(MP1, 0, mmMP1_SMN_C2PMSG_90) == 0x1 ? 0 : -EIO;
+	return -ETIME;
 }
 
 int
@@ -80,9 +78,11 @@ smu_v12_0_send_msg_with_param(struct smu_context *smu,
 		return index;
 
 	ret = smu_v12_0_wait_for_response(smu);
-	if (ret)
-		pr_err("Failed to send message 0x%x, response 0x%x, param 0x%x\n",
-		       index, ret, param);
+	if (ret) {
+		pr_err("Msg issuing pre-check failed and "
+		       "SMU may be not in the right state!\n");
+		return ret;
+	}
 
 	WREG32_SOC15(MP1, 0, mmMP1_SMN_C2PMSG_90, 0);
 
-- 
2.24.0