drm/amdgpu: add print support for vcn_v4_0 ip dump

Add support for logging the registers in devcoredump
buffer for vcn_v4_0.
Signed-off-by: Sunil Khatri <sunil.khatri@amd.com>
Acked-by: Leo Liu <leo.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c

@@ -2158,6 +2158,38 @@ static void vcn_v4_0_set_irq_funcs(struct amdgpu_device *adev)
 	}
 }
 
+static void vcn_v4_0_print_ip_state(void *handle, struct drm_printer *p)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+	int i, j;
+	uint32_t reg_count = ARRAY_SIZE(vcn_reg_list_4_0);
+	uint32_t inst_off, is_powered;
+
+	if (!adev->vcn.ip_dump)
+		return;
+
+	drm_printf(p, "num_instances:%d\n", adev->vcn.num_vcn_inst);
+	for (i = 0; i < adev->vcn.num_vcn_inst; i++) {
+		if (adev->vcn.harvest_config & (1 << i)) {
+			drm_printf(p, "\nHarvested Instance:VCN%d Skipping dump\n", i);
+			continue;
+		}
+
+		inst_off = i * reg_count;
+		is_powered = (adev->vcn.ip_dump[inst_off] &
+				UVD_POWER_STATUS__UVD_POWER_STATUS_MASK) != 1;
+
+		if (is_powered) {
+			drm_printf(p, "\nActive Instance:VCN%d\n", i);
+			for (j = 0; j < reg_count; j++)
+				drm_printf(p, "%-50s \t 0x%08x\n", vcn_reg_list_4_0[j].reg_name,
+					   adev->vcn.ip_dump[inst_off + j]);
+		} else {
+			drm_printf(p, "\nInactive Instance:VCN%d\n", i);
+		}
+	}
+}
+
 static void vcn_v4_0_dump_ip_state(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
@@ -2206,7 +2238,7 @@ static const struct amd_ip_funcs vcn_v4_0_ip_funcs = {
 	.set_clockgating_state = vcn_v4_0_set_clockgating_state,
 	.set_powergating_state = vcn_v4_0_set_powergating_state,
 	.dump_ip_state = vcn_v4_0_dump_ip_state,
-	.print_ip_state = NULL,
+	.print_ip_state = vcn_v4_0_print_ip_state,
 };
 
 const struct amdgpu_ip_block_version vcn_v4_0_ip_block = {