drm/amdgpu: fill in vce clock info ioctl query (v2)

Returns the vce clock table for the user mode driver.
The user mode driver can fill this data into vce clock
data packet for optimal VCE DPM.

v2: update to the new API
Reviewed-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -524,6 +524,24 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
 		return copy_to_user(out, &dev_info,
 				    min((size_t)size, sizeof(dev_info))) ? -EFAULT : 0;
 	}
+	case AMDGPU_INFO_VCE_CLOCK_TABLE: {
+		unsigned i;
+		struct drm_amdgpu_info_vce_clock_table vce_clk_table = {};
+		struct amd_vce_state *vce_state;
+
+		for (i = 0; i < AMDGPU_VCE_CLOCK_TABLE_ENTRIES; i++) {
+			vce_state = amdgpu_dpm_get_vce_clock_state(adev, i);
+			if (vce_state) {
+				vce_clk_table.entries[i].sclk = vce_state->sclk;
+				vce_clk_table.entries[i].mclk = vce_state->mclk;
+				vce_clk_table.entries[i].eclk = vce_state->evclk;
+				vce_clk_table.num_valid_entries++;
+			}
+		}
+
+		return copy_to_user(out, &vce_clk_table,
+				    min((size_t)size, sizeof(vce_clk_table))) ? -EFAULT : 0;
+	}
 	default:
 		DRM_DEBUG_KMS("Invalid request %d\n", info->query);
 		return -EINVAL;