hwc: add vc4_output_get_hwc

Change-Id: I9ae66a39ef42a2191edf450a83d914f1dfc35b7a

diff --git a/src/tdm_vc4_display.c b/src/tdm_vc4_display.c
index 3cd3cec..fca23f7 100644 (file)
--- a/src/tdm_vc4_display.c
+++ b/src/tdm_vc4_display.c
@@ -1883,6 +1883,46 @@ vc4_output_get_mode(tdm_output *output, const tdm_output_mode **mode)
        return TDM_ERROR_NONE;
 }
 
+tdm_hwc *
+vc4_output_get_hwc(tdm_output *output, tdm_error *error)
+{
+       tdm_vc4_hwc_data *hwc_data = NULL;
+       tdm_vc4_output_data *output_data = output;
+
+       if (!output_data) {
+               TDM_ERR("invalid params");
+               if (error)
+                       *error = TDM_ERROR_INVALID_PARAMETER;
+               return NULL;
+       }
+
+       if (output_data->hwc_data) {
+               TDM_INFO("hwc_data already exists");
+               if (error)
+                       *error = TDM_ERROR_NONE;
+               return output_data->hwc_data;
+       }
+
+       hwc_data = calloc(1, sizeof(tdm_vc4_hwc_data));
+       if (!hwc_data) {
+               TDM_ERR("alloc failed");
+               if (error)
+                       *error = TDM_ERROR_OUT_OF_MEMORY;
+               return NULL;
+       }
+       hwc_data->output_data = output_data;
+
+       LIST_INITHEAD(&hwc_data->hwc_window_list);
+
+       output_data->hwc_data = hwc_data;
+
+       if (error)
+               *error = TDM_ERROR_NONE;
+
+       return hwc_data;
+}
+
+
 tdm_error
 vc4_output_set_status_handler(tdm_output *output,
                                                          tdm_output_status_handler func,