egl: Allow software rendering for vgem/virtio_gpu in platform_device

[mesa.git] / src / egl / drivers / dri2 / platform_device.c

diff --git a/src/egl/drivers/dri2/platform_device.c b/src/egl/drivers/dri2/platform_device.c
index 7380a6d75c431947b186cbafccefdff7df53036a..7c12b4792c223c55ea98bcfd702c7f8d0c342874 100644 (file)
--- a/src/egl/drivers/dri2/platform_device.c
+++ b/src/egl/drivers/dri2/platform_device.c
@@ -40,8 +40,8 @@
 #include <unistd.h>
 
 #include "egl_dri2.h"
-#include "egl_dri2_fallbacks.h"
 #include "loader.h"
+#include "util/debug.h"
 
 static __DRIimage*
 device_alloc_image(struct dri2_egl_display *dri2_dpy,
@@ -183,16 +183,9 @@ dri2_device_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 }
 
 static const struct dri2_egl_display_vtbl dri2_device_display_vtbl = {
-   .create_pixmap_surface = dri2_fallback_create_pixmap_surface,
    .create_pbuffer_surface = dri2_device_create_pbuffer_surface,
    .destroy_surface = device_destroy_surface,
    .create_image = dri2_create_image_khr,
-   .swap_buffers_region = dri2_fallback_swap_buffers_region,
-   .post_sub_buffer = dri2_fallback_post_sub_buffer,
-   .copy_buffers = dri2_fallback_copy_buffers,
-   .query_buffer_age = dri2_fallback_query_buffer_age,
-   .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
-   .get_sync_values = dri2_fallback_get_sync_values,
    .get_dri_drawable = dri2_surface_get_dri_drawable,
 };
 
@@ -260,8 +253,9 @@ static bool
 device_probe_device(_EGLDisplay *disp)
 {
    struct dri2_egl_display *dri2_dpy = disp->DriverData;
+   bool request_software = env_var_as_boolean("LIBGL_ALWAYS_SOFTWARE", false);
 
-   if (disp->Options.ForceSoftware)
+   if (request_software)
       _eglLog(_EGL_WARNING, "Not allowed to force software rendering when "
                             "API explicitly selects a hardware device.");
    dri2_dpy->fd = device_get_fd(disp, disp->Device);
@@ -272,6 +266,18 @@ device_probe_device(_EGLDisplay *disp)
    if (!dri2_dpy->driver_name)
       goto err_name;
 
+   /* When doing software rendering, some times user still want to explicitly
+    * choose the render node device since cross node import doesn't work between
+    * vgem/virtio_gpu yet. It would be nice to have a new EXTENSION for this.
+    * For now, just fallback to kms_swrast. */
+   if (disp->Options.ForceSoftware && !request_software &&
+       (strcmp(dri2_dpy->driver_name, "vgem") == 0 ||
+        strcmp(dri2_dpy->driver_name, "virtio_gpu") == 0)) {
+      free(dri2_dpy->driver_name);
+      _eglLog(_EGL_WARNING, "NEEDS EXTENSION: falling back to kms_swrast");
+      dri2_dpy->driver_name = strdup("kms_swrast");
+   }
+
    if (!dri2_load_driver_dri3(disp))
       goto err_load;