drm/amdgpu: add amdgpu_umsch_mm module parameter

Enable Multi Media User Mode Scheduler
(0 = disabled (default), 1 = enabled).
Signed-off-by: Lang Yu <Lang.Yu@amd.com>
Acked-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Veerabadhran Gopalakrishnan <Veerabadhran.Gopalakrishnan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -244,6 +244,7 @@ extern int amdgpu_num_kcq;
 #define AMDGPU_VCNFW_LOG_SIZE (32 * 1024)
 extern int amdgpu_vcnfw_log;
 extern int amdgpu_sg_display;
+extern int amdgpu_umsch_mm;
 
 extern int amdgpu_user_partt_mode;
 

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

@@ -2164,8 +2164,10 @@ static int amdgpu_discovery_set_umsch_mm_ip_blocks(struct amdgpu_device *adev)
 {
 	switch (adev->ip_versions[VCN_HWIP][0]) {
 	case IP_VERSION(4, 0, 5):
-		amdgpu_device_ip_block_add(adev, &umsch_mm_v4_0_ip_block);
-		adev->enable_umsch_mm = true;
+		if (amdgpu_umsch_mm & 0x1) {
+			amdgpu_device_ip_block_add(adev, &umsch_mm_v4_0_ip_block);
+			adev->enable_umsch_mm = true;
+		}
 		break;
 	default:
 		break;

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

@@ -194,6 +194,7 @@ int amdgpu_use_xgmi_p2p = 1;
 int amdgpu_vcnfw_log;
 int amdgpu_sg_display = -1; /* auto */
 int amdgpu_user_partt_mode = AMDGPU_AUTO_COMPUTE_PARTITION_MODE;
+int amdgpu_umsch_mm;
 
 static void amdgpu_drv_delayed_reset_work_handler(struct work_struct *work);
 
@@ -907,6 +908,15 @@ module_param_named(vcnfw_log, amdgpu_vcnfw_log, int, 0444);
 MODULE_PARM_DESC(sg_display, "S/G Display (-1 = auto (default), 0 = disable)");
 module_param_named(sg_display, amdgpu_sg_display, int, 0444);
 
+/**
+ * DOC: umsch_mm (int)
+ * Enable Multi Media User Mode Scheduler. This is a HW scheduling engine for VCN and VPE.
+ * (0 = disabled (default), 1 = enabled)
+ */
+MODULE_PARM_DESC(umsch_mm,
+	"Enable Multi Media User Mode Scheduler (0 = disabled (default), 1 = enabled)");
+module_param_named(umsch_mm, amdgpu_umsch_mm, int, 0444);
+
 /**
  * DOC: smu_pptable_id (int)
  * Used to override pptable id. id = 0 use VBIOS pptable.