[PATCH v3] drm/amd/pm: only poweron/off vcn/jpeg when they are valid.

[Yifan Zhang]

If vcn is disabled in kernel parameters, don't touch vcn,
otherwise it may cause vcn hang.

v2: delete unnecessary logs
v3: move "is_vcn_enabled" check to smu_dpm_setvcn/jpeg_enable (Evan)

Signed-off-by: Yifan Zhang <yifan1.zhang at amd.com>
---
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 24 +++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index f005a90c35af..e3e1f69643ce 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -215,6 +215,21 @@ static int smu_set_gfx_imu_enable(struct smu_context *smu)
 	return smu_set_gfx_power_up_by_imu(smu);
 }
 
+static bool is_vcn_enabled(struct amdgpu_device *adev)
+{
+	int i;
+
+	for (i = 0; i < adev->num_ip_blocks; i++) {
+		if ((adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_VCN ||
+			adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_JPEG) &&
+			!adev->ip_blocks[i].status.valid)
+
+			return false;
+	}
+
+	return true;
+}
+
 static int smu_dpm_set_vcn_enable(struct smu_context *smu,
 				  bool enable)
 {
@@ -222,6 +237,12 @@ static int smu_dpm_set_vcn_enable(struct smu_context *smu,
 	struct smu_power_gate *power_gate = &smu_power->power_gate;
 	int ret = 0;
 
+	/*
+	 * don't poweron vcn/jpeg when they are skipped.
+	 */
+	if (!is_vcn_enabled(smu->adev))
+		return 0;
+
 	if (!smu->ppt_funcs->dpm_set_vcn_enable)
 		return 0;
 
@@ -242,6 +263,9 @@ static int smu_dpm_set_jpeg_enable(struct smu_context *smu,
 	struct smu_power_gate *power_gate = &smu_power->power_gate;
 	int ret = 0;
 
+	if (!is_vcn_enabled(smu->adev))
+		return 0;
+
 	if (!smu->ppt_funcs->dpm_set_jpeg_enable)
 		return 0;
 
-- 
2.37.3