st/omx: add headless support

This will allow dec/enc/transcode without X

v2:  use env override even with X,
     use loader_open_device instead of open
v3:  clean up

Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>

diff --git a/src/gallium/state_trackers/omx/entrypoint.c b/src/gallium/state_trackers/omx/entrypoint.c
index a7656660e8c52a4a36d42ab6c87d9d2b36d05491..7df90b16a84e60c85894f9c32743fcc2f59e0e92 100644 (file)
--- a/src/gallium/state_trackers/omx/entrypoint.c
+++ b/src/gallium/state_trackers/omx/entrypoint.c
@@ -38,6 +38,7 @@
 
 #include "os/os_thread.h"
 #include "util/u_memory.h"
+#include "loader/loader.h"
 
 #include "entrypoint.h"
 #include "vid_dec.h"
@@ -47,6 +48,8 @@ pipe_static_mutex(omx_lock);
 static Display *omx_display = NULL;
 static struct vl_screen *omx_screen = NULL;
 static unsigned omx_usecount = 0;
+static const char *omx_render_node = NULL;
+static int drm_fd;
 
 int omx_component_library_Setup(stLoaderComponentType **stComponents)
 {
@@ -73,18 +76,30 @@ struct vl_screen *omx_get_screen(void)
    pipe_mutex_lock(omx_lock);
 
    if (!omx_display) {
-      omx_display = XOpenDisplay(NULL);
-      if (!omx_display) {
-         pipe_mutex_unlock(omx_lock);
-         return NULL;
+      omx_render_node = debug_get_option("OMX_RENDER_NODE", NULL);
+      if (!omx_render_node) {
+         omx_display = XOpenDisplay(NULL);
+         if (!omx_display)
+            goto error;
       }
    }
 
    if (!omx_screen) {
-      omx_screen = vl_screen_create(omx_display, 0);
-      if (!omx_screen) {
-         pipe_mutex_unlock(omx_lock);
-         return NULL;
+      if (omx_render_node) {
+         drm_fd = loader_open_device(omx_render_node);
+         if (drm_fd < 0)
+            goto error;
+         omx_screen = vl_drm_screen_create(drm_fd);
+         if (!omx_screen) {
+            close(drm_fd);
+            goto error;
+         }
+      } else {
+         omx_screen = vl_screen_create(omx_display, 0);
+         if (!omx_screen) {
+            XCloseDisplay(omx_display);
+            goto error;
+         }
       }
    }
 
@@ -92,14 +107,24 @@ struct vl_screen *omx_get_screen(void)
 
    pipe_mutex_unlock(omx_lock);
    return omx_screen;
+
+error:
+   pipe_mutex_unlock(omx_lock);
+   return NULL;
 }
 
 void omx_put_screen(void)
 {
    pipe_mutex_lock(omx_lock);
    if ((--omx_usecount) == 0) {
-      vl_screen_destroy(omx_screen);
-      XCloseDisplay(omx_display);
+      if (!omx_render_node) {
+         vl_screen_destroy(omx_screen);
+         if (omx_display)
+            XCloseDisplay(omx_display);
+      } else {
+         close(drm_fd);
+         vl_drm_screen_destroy(omx_screen);
+      }
       omx_screen = NULL;
       omx_display = NULL;
    }