[PATCH] drm/amd/powerplay: avoid DPM reenable process on Navi1x ASICs

[Evan Quan]

Otherwise, without RLC reinitialization, the DPM reenablement
will fail. That affects the custom pptable uploading.

Change-Id: I6fe2ed5ce23f2a5b66f371c0b6d1f924837e5af6
Signed-off-by: Evan Quan <evan.quan at amd.com>
---
 drivers/gpu/drm/amd/powerplay/amdgpu_smu.c    | 32 +++++++++++++++----
 .../gpu/drm/amd/powerplay/inc/amdgpu_smu.h    |  1 +
 2 files changed, 26 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
index 76a4154b3be2..a4d67b30fd72 100644
--- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
@@ -1293,10 +1293,25 @@ static int smu_hw_fini(void *handle)
 		return ret;
 	}
 
-	ret = smu_stop_dpms(smu);
-	if (ret) {
-		pr_warn("Fail to stop Dpms!\n");
-		return ret;
+	/*
+	 * For custom pptable uploading, skip the DPM features
+	 * disable process on Navi1x ASICs.
+	 *   - As the gfx related features are under control of
+	 *     RLC on those ASICs. RLC reinitialization will be
+	 *     needed to reenable them. That will cost much more
+	 *     efforts.
+	 *
+	 *   - SMU firmware can handle the DPM reenablement
+	 *     properly.
+	 */
+	if (!smu->uploading_custom_pp_table ||
+	    !((adev->asic_type >= CHIP_NAVI10) &&
+	      (adev->asic_type <= CHIP_NAVI12))) {
+		ret = smu_stop_dpms(smu);
+		if (ret) {
+			pr_warn("Fail to stop Dpms!\n");
+			return ret;
+		}
 	}
 
 	kfree(table_context->driver_pptable);
@@ -1324,13 +1339,16 @@ int smu_reset(struct smu_context *smu)
 	struct amdgpu_device *adev = smu->adev;
 	int ret = 0;
 
+	smu->uploading_custom_pp_table = true;
+
 	ret = smu_hw_fini(adev);
 	if (ret)
-		return ret;
+		goto out;
 
 	ret = smu_hw_init(adev);
-	if (ret)
-		return ret;
+
+out:
+	smu->uploading_custom_pp_table = false;
 
 	return ret;
 }
diff --git a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
index 8120e7587585..215841f5fb93 100644
--- a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
@@ -391,6 +391,7 @@ struct smu_context
 
 	uint32_t smc_if_version;
 
+	bool uploading_custom_pp_table;
 };
 
 struct i2c_adapter;
-- 
2.24.0