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render/egl: add support for EGL_EXT_device_drm_render_node 

This EGL extension has been added in [1]. The upsides are:

- We directly get a render node, instead of having to convert the
  primary node name to a render node name.
- If EGL_DRM_RENDER_NODE_FILE_EXT returns NULL, that means there is
  no render node being used by the driver.

[1]: https://github.com/KhronosGroup/EGL-Registry/pull/127
This commit is contained in:
Simon Ser 2021-07-09 13:07:22 +02:00 committed by Simon Zeni
parent ace2eda073
commit 3cf2535c23
2 changed files with 30 additions and 11 deletions
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1
include/wlr/render/egl.h
View File

@ -43,6 +43,7 @@ struct wlr_egl {
// Device extensions
bool EXT_device_drm;
bool EXT_device_drm_render_node;
} exts;
struct {

40
render/egl.c
View File

@ -289,6 +289,8 @@ struct wlr_egl *wlr_egl_create_with_drm_fd(int drm_fd) {
egl->exts.EXT_device_drm =
check_egl_ext(device_exts_str, "EGL_EXT_device_drm");
egl->exts.EXT_device_drm_render_node =
check_egl_ext(device_exts_str, "EGL_EXT_device_drm_render_node");
}
if (!check_egl_ext(display_exts_str, "EGL_KHR_no_config_context") &&
@ -712,23 +714,39 @@ static char *get_render_name(const char *name) {
}
int wlr_egl_dup_drm_fd(struct wlr_egl *egl) {
if (egl->device == EGL_NO_DEVICE_EXT || !egl->exts.EXT_device_drm) {
if (egl->device == EGL_NO_DEVICE_EXT || (!egl->exts.EXT_device_drm &&
!egl->exts.EXT_device_drm_render_node)) {
return -1;
}
const char *primary_name = egl->procs.eglQueryDeviceStringEXT(egl->device,
EGL_DRM_DEVICE_FILE_EXT);
if (primary_name == NULL) {
wlr_log(WLR_ERROR,
"eglQueryDeviceStringEXT(EGL_DRM_DEVICE_FILE_EXT) failed");
return -1;
char *render_name = NULL;
#ifdef EGL_EXT_device_drm_render_node
if (egl->exts.device_drm_render_node_ext) {
const char *name = egl->procs.eglQueryDeviceStringEXT(egl->device,
EGL_DRM_RENDER_NODE_FILE_EXT);
if (name == NULL) {
wlr_log(WLR_DEBUG, "EGL device has no render node");
return -1;
}
render_name = strdup(name);
}
#endif
char *render_name = get_render_name(primary_name);
if (render_name == NULL) {
wlr_log(WLR_ERROR, "Can't find render node name for device %s",
primary_name);
return -1;
const char *primary_name = egl->procs.eglQueryDeviceStringEXT(egl->device,
EGL_DRM_DEVICE_FILE_EXT);
if (primary_name == NULL) {
wlr_log(WLR_ERROR,
"eglQueryDeviceStringEXT(EGL_DRM_DEVICE_FILE_EXT) failed");
return -1;
}
render_name = get_render_name(primary_name);
if (render_name == NULL) {
wlr_log(WLR_ERROR, "Can't find render node name for device %s",
primary_name);
return -1;
}
}
int render_fd = open(render_name, O_RDWR | O_NONBLOCK | O_CLOEXEC);