drm/amdgpu/vpe: add multi instance VPE support

Add support for multi instance VPE processing.
Signed-off-by: Lang Yu <Lang.Yu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1320,6 +1320,15 @@ static int amdgpu_discovery_reg_base_init(struct amdgpu_device *adev)
 				}
 			}
 
+			if (le16_to_cpu(ip->hw_id) == VPE_HWID) {
+				if (adev->vpe.num_instances < AMDGPU_MAX_VPE_INSTANCES)
+					adev->vpe.num_instances++;
+				else
+					dev_err(adev->dev, "Too many VPE instances: %d vs %d\n",
+						adev->vpe.num_instances + 1,
+						AMDGPU_MAX_VPE_INSTANCES);
+			}
+
 			if (le16_to_cpu(ip->hw_id) == UMC_HWID) {
 				adev->gmc.num_umc++;
 				adev->umc.node_inst_num++;

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

@@ -27,6 +27,8 @@
 #include "amdgpu_irq.h"
 #include "vpe_6_1_fw_if.h"
 
+#define AMDGPU_MAX_VPE_INSTANCES 2
+
 struct amdgpu_vpe;
 
 struct vpe_funcs {
@@ -74,6 +76,8 @@ struct amdgpu_vpe {
 	uint32_t			*cmdbuf_cpu_addr;
 	struct delayed_work		idle_work;
 	bool				context_started;
+
+	uint32_t			num_instances;
 };
 
 int amdgpu_vpe_psp_update_sram(struct amdgpu_device *adev);