diff options
Diffstat (limited to 'lib/igt_debugfs.c')
| -rw-r--r-- | lib/igt_debugfs.c | 45 |
1 files changed, 36 insertions, 9 deletions
diff --git a/lib/igt_debugfs.c b/lib/igt_debugfs.c index 5c029019..79b2618b 100644 --- a/lib/igt_debugfs.c +++ b/lib/igt_debugfs.c @@ -76,13 +76,7 @@ * General debugfs helpers */ -/** - * igt_debugfs_init: - * @debugfs: debugfs access structure to initialize - * - * Initializes the debugfs access helper library. - */ -void igt_debugfs_init(igt_debugfs_t *debugfs) +static bool __igt_debugfs_init(igt_debugfs_t *debugfs) { const char *path = "/sys/kernel/debug"; struct stat st; @@ -107,13 +101,24 @@ find_minor: sprintf(debugfs->dri_path + len, "/i915_error_state"); if (stat(debugfs->dri_path, &st) == 0) { debugfs->dri_path[len] = '\0'; - return; + return true; } } debugfs->dri_path[0] = '\0'; - igt_fail(4); + return false; +} + +/** + * igt_debugfs_init: + * @debugfs: debugfs access structure to initialize + * + * Initializes the debugfs access helper library. + */ +void igt_debugfs_init(igt_debugfs_t *debugfs) +{ + igt_assert(__igt_debugfs_init(debugfs)); } /** @@ -578,3 +583,25 @@ void igt_enable_prefault(void) { igt_prefault_control(true); } + +/** + * igt_open_forcewake_handle: + * + * This functions opens the debugfs forcewake file and so prevents the GT from + * suspending. The reference is automatically dropped when the is closed. + * + * Returns: The file descriptor of the forcewake handle or -1 if that didn't + * work out. + */ +int igt_open_forcewake_handle(void) +{ + igt_debugfs_t debugfs; + int fd; + + if (!__igt_debugfs_init(&debugfs)) + return -1; + + fd = igt_debugfs_open(&debugfs, "i915_forcewake_user", O_WRONLY); + + return fd; +} |