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egl: Allow software rendering for vgem/virtio_gpu in platform_device

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Then user could explicitly choose the underlying device for software
rendering when both vgem/virtio_vga are there.

Signed-off-by: Lepton Wu <lepton@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5830>
This commit is contained in:
Lepton Wu 2020-07-09 11:49:33 -07:00 • committed by Marge Bot
parent eaf27eb512
commit 81c0e2ab63
1 changed files with 15 additions and 1 deletions
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16
src/egl/drivers/dri2/platform_device.c
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@ -41,6 +41,7 @@
#include "egl_dri2.h"
#include "loader.h"
#include "util/debug.h"
static __DRIimage*
device_alloc_image(struct dri2_egl_display *dri2_dpy,
@ -252,8 +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);
@ -264,6 +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;