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backend/drm: fetch EDID manufacturer from udev_hwdb

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Maintaining our internal table up-to-date is tedious: one needs to
manually go through the PnP ID registry [1] and check whether we're
missing any entry.

udev_hwdb already has an API to fetch a manufacturer name from its
PnP ID. Use that instead.

[1]: https://uefi.org/pnp_id_list
This commit is contained in:
Simon Ser 2022-05-06 11:58:17 +02:00 • committed by Simon Zeni
parent fa9b61004b
commit e646d882cf
5 changed files with 67 additions and 81 deletions
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26
backend/drm/backend.c
View file

@ -1,6 +1,7 @@
#include <assert.h>
#include <errno.h>
#include <drm_fourcc.h>
#include <libudev.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -58,6 +59,7 @@ static void backend_destroy(struct wlr_backend *backend) {
finish_drm_resources(drm);
udev_hwdb_unref(drm->hwdb);
free(drm->name);
wlr_session_close_file(drm->session, drm->dev);
wl_event_source_remove(drm->drm_event);
@ -172,6 +174,23 @@ static void handle_parent_destroy(struct wl_listener *listener, void *data) {
backend_destroy(&drm->backend);
}
static struct udev_hwdb *create_udev_hwdb(void) {
struct udev *udev = udev_new();
if (!udev) {
wlr_log(WLR_ERROR, "udev_new failed");
return NULL;
}
struct udev_hwdb *hwdb = udev_hwdb_new(udev);
udev_unref(udev);
if (!hwdb) {
wlr_log(WLR_ERROR, "udev_hwdb_new failed");
return NULL;
}
return hwdb;
}
struct wlr_backend *wlr_drm_backend_create(struct wl_display *display,
struct wlr_session *session, struct wlr_device *dev,
struct wlr_backend *parent) {
@ -226,6 +245,12 @@ struct wlr_backend *wlr_drm_backend_create(struct wl_display *display,
drm->session_active.notify = handle_session_active;
wl_signal_add(&session->events.active, &drm->session_active);
drm->hwdb = create_udev_hwdb();
if (!drm->hwdb) {
wlr_log(WLR_INFO, "Failed to load udev_hwdb, "
"falling back to PnP IDs instead of manufacturer names");
}
if (!check_drm_features(drm)) {
goto error_event;
}
@ -275,6 +300,7 @@ error_mgpu_renderer:
error_resources:
finish_drm_resources(drm);
error_event:
udev_hwdb_unref(drm->hwdb);
wl_list_remove(&drm->session_active.link);
wl_event_source_remove(drm->drm_event);
error_fd: