[PATCH] drm/amd/powerplay: error out when force clock level under auto dpm mode

[Evan Quan]

Forcing clock level is supported under manual dpm mode only. Error out
when trying to set under manual mode. Instead of doing nothing and
reporting success.

Change-Id: I2af32be5ebd4323a98cb48da88b22177a68fbdb0
Signed-off-by: Evan Quan <evan.quan at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c        |  5 ++++-
 drivers/gpu/drm/amd/powerplay/amd_powerplay.c | 11 +++++++----
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index 94055a485e01..c2efd79d9a39 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -704,7 +704,10 @@ static ssize_t amdgpu_set_pp_dpm_sclk(struct device *dev,
 		return ret;
 
 	if (adev->powerplay.pp_funcs->force_clock_level)
-		amdgpu_dpm_force_clock_level(adev, PP_SCLK, mask);
+		ret = amdgpu_dpm_force_clock_level(adev, PP_SCLK, mask);
+
+	if (ret)
+		return -EINVAL;
 
 	return count;
 }
diff --git a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
index e8964cae6b93..da9ff2cc2777 100644
--- a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
+++ b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
@@ -723,11 +723,14 @@ static int pp_dpm_force_clock_level(void *handle,
 		pr_info("%s was not implemented.\n", __func__);
 		return 0;
 	}
+
+	if (hwmgr->dpm_level != AMD_DPM_FORCED_LEVEL_MANUAL) {
+		pr_info("force clock level is for dpm manual mode only.\n");
+		return -EINVAL;
+	}
+
 	mutex_lock(&hwmgr->smu_lock);
-	if (hwmgr->dpm_level == AMD_DPM_FORCED_LEVEL_MANUAL)
-		ret = hwmgr->hwmgr_func->force_clock_level(hwmgr, type, mask);
-	else
-		ret = -EINVAL;
+	ret = hwmgr->hwmgr_func->force_clock_level(hwmgr, type, mask);
 	mutex_unlock(&hwmgr->smu_lock);
 	return ret;
 }
-- 
2.19.1