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Add explicitly picking GPUs with environment var

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Scott Anderson 2017-10-02 21:57:14 +13:00
parent f193623ca1
commit 6cfe47d1d8
1 changed files with 35 additions and 1 deletions
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36
backend/session/session.c
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@ -1,7 +1,8 @@
#define _POSIX_C_SOURCE 200809L
#include <assert.h> #include <assert.h>
#include <stddef.h> #include <stddef.h>
#include <stdarg.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h>
#include <sys/stat.h> #include <sys/stat.h>
#include <sys/types.h> #include <sys/types.h>
#include <libudev.h> #include <libudev.h>
@ -224,11 +225,44 @@ out_fd:
return -1; return -1;
} }
static size_t explicit_find_gpus(struct wlr_session *session,
size_t ret_len, int ret[static ret_len], const char *str) {
char *gpus = strdup(str);
if (!gpus) {
wlr_log_errno(L_ERROR, "Allocation failed");
return 0;
}
size_t i = 0;
char *save;
char *ptr = strtok_r(gpus, ":", &save);
do {
if (i >= ret_len) {
break;
}
ret[i] = open_if_kms(session, ptr);
if (ret[i] <= 0) {
wlr_log(L_ERROR, "Unable to open %s as DRM device", ptr);
} else {
++i;
}
} while ((ptr = strtok_r(NULL, ":", &save)));
free(ptr);
return i;
}
/* Tries to find the primary GPU by checking for the "boot_vga" attribute. /* Tries to find the primary GPU by checking for the "boot_vga" attribute.
* If it's not found, it returns the first valid GPU it finds. * If it's not found, it returns the first valid GPU it finds.
*/ */
size_t wlr_session_find_gpus(struct wlr_session *session, size_t wlr_session_find_gpus(struct wlr_session *session,
size_t ret_len, int ret[static ret_len]) { size_t ret_len, int ret[static ret_len]) {
const char *explicit = getenv("WLR_DRM_DEVICES");
if (explicit) {
return explicit_find_gpus(session, ret_len, ret, explicit);
}
struct udev_enumerate *en = udev_enumerate_new(session->udev); struct udev_enumerate *en = udev_enumerate_new(session->udev);
if (!en) { if (!en) {
wlr_log(L_ERROR, "Failed to create udev enumeration"); wlr_log(L_ERROR, "Failed to create udev enumeration");