diff options
| -rw-r--r-- | backend/session/session.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/backend/session/session.c b/backend/session/session.c index be79c34d..72eb6149 100644 --- a/backend/session/session.c +++ b/backend/session/session.c @@ -1,7 +1,8 @@ +#define _POSIX_C_SOURCE 200809L #include <assert.h> #include <stddef.h> -#include <stdarg.h> #include <stdlib.h> +#include <string.h> #include <sys/stat.h> #include <sys/types.h> #include <libudev.h> @@ -224,11 +225,44 @@ out_fd: 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. * 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 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); if (!en) { wlr_log(L_ERROR, "Failed to create udev enumeration"); |