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egl/drm: reinstate (kms_)swrast support

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With earlier commit we've added a generic LIBGL_ALWAYS_SOFTWARE handling
yet did not consider that the existing codebase unconditionally errors
out when set. That was fixed with a latter commit, while the fix itself
added erroneous restriction for egl/drm.

As mentioned in the report - the feature was working for ages. It was a
Gnome developer who added kms_swrast support for gbm in the first place.

Admittedly kms_swrast is somewhat in the middle between traditional
swrast and HW drivers, regardless - reinstate support.

Fixes: 47273d7312 ("egl: set UseFallback if LIBGL_ALWAYS_SOFTWARE is set")
Closes: https://gitlab.freedesktop.org/mesa/mesa/issues/165
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Acked-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4084>
This commit is contained in:
Emil Velikov 2020-03-04 18:33:09 +00:00 • committed by Emil Velikov
parent b699d070a6
commit fa5e800e05
1 changed files with 1 additions and 5 deletions
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6
src/egl/drivers/dri2/platform_drm.c
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@ -695,10 +695,6 @@ dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
struct gbm_device *gbm; struct gbm_device *gbm;
const char *err; const char *err;
/* Not supported yet */
if (disp->Options.ForceSoftware)
return EGL_FALSE;
dri2_dpy = calloc(1, sizeof *dri2_dpy); dri2_dpy = calloc(1, sizeof *dri2_dpy);
if (!dri2_dpy) if (!dri2_dpy)
return _eglError(EGL_BAD_ALLOC, "eglInitialize"); return _eglError(EGL_BAD_ALLOC, "eglInitialize");
@ -732,7 +728,7 @@ dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
goto cleanup; goto cleanup;
} }
dev = _eglAddDevice(dri2_dpy->fd, false); dev = _eglAddDevice(dri2_dpy->fd, disp->Options.ForceSoftware);
if (!dev) { if (!dev) {
err = "DRI2: failed to find EGLDevice"; err = "DRI2: failed to find EGLDevice";
goto cleanup; goto cleanup;