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backend/session/session.c: enumerate gpus using drmGetDevices2

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This commit is contained in:
illiliti 2022-03-13 23:00:28 +03:00
parent 3468395cba
commit 272e8488af
1 changed files with 54 additions and 1 deletions
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55
backend/session/session.c
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@ -11,6 +11,7 @@
#include <wlr/backend/session.h>
#include <wlr/config.h>
#include <wlr/util/log.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include "backend/session/session.h"
#include "backend/session/dev.h"
@ -303,5 +304,57 @@ ssize_t wlr_session_find_gpus(struct wlr_session *session,
return dev_find_gpus(session, ret_len, ret);
#endif
return -1;
int cnt = drmGetDevices2(0, NULL, 0);
if (cnt <= 0) {
return cnt == 0 ? 0 : -1;
}
drmDevicePtr *devs = calloc(cnt, sizeof(*devs));
if (!devs) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return -1;
}
cnt = drmGetDevices2(0, devs, cnt);
if (cnt <= 0) {
free(devs);
return cnt == 0 ? 0 : -1;
}
ssize_t total = 0;
size_t max = (size_t)cnt > ret_len ? ret_len : (size_t)cnt;
for (size_t i = 0; i < max; i++) {
if (!(devs[i]->available_nodes & (1 << DRM_NODE_PRIMARY))) {
continue;
}
// TODO
bool is_boot_vga = false;
// TODO https://todo.sr.ht/~kennylevinsen/seatd/1
const char *seat = "seat0";
if (session->seat[0] != '\0' && strcmp(session->seat, seat) != 0) {
continue;
}
const char *devnode = devs[i]->nodes[DRM_NODE_PRIMARY];
struct wlr_device *wlr_dev = session_open_if_kms(session, devnode);
if (!wlr_dev) {
continue;
}
ret[total] = wlr_dev;
if (is_boot_vga) {
struct wlr_device *tmp = ret[0];
ret[0] = ret[total];
ret[total] = tmp;
}
total++;
}
drmFreeDevices(devs, cnt);
free(devs);
return total;
}