diff options
| -rw-r--r-- | drivers/gpu/drm/drm_drv.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 2c9a2b6f7a4a..f8a7a6e66b7e 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -37,13 +37,23 @@ #include "drm_legacy.h" #include "drm_internal.h" -unsigned int drm_debug = 0; /* bitmask of DRM_UT_x */ +/* + * drm_debug: Enable debug output. + * Bitmask of DRM_UT_x. See include/drm/drmP.h for details. + */ +unsigned int drm_debug = 0; EXPORT_SYMBOL(drm_debug); MODULE_AUTHOR(CORE_AUTHOR); MODULE_DESCRIPTION(CORE_DESC); MODULE_LICENSE("GPL and additional rights"); -MODULE_PARM_DESC(debug, "Enable debug output"); +MODULE_PARM_DESC(debug, "Enable debug output, where each bit enables a debug category.\n" +"\t\tBit 0 (0x01) will enable CORE messages (drm core code)\n" +"\t\tBit 1 (0x02) will enable DRIVER messages (drm controller code)\n" +"\t\tBit 2 (0x04) will enable KMS messages (modesetting code)\n" +"\t\tBit 3 (0x08) will enable PRIME messages (prime code)\n" +"\t\tBit 4 (0x10) will enable ATOMIC messages (atomic code)\n" +"\t\tBit 5 (0x20) will enable VBL messages (vblank code)"); module_param_named(debug, drm_debug, int, 0600); static DEFINE_SPINLOCK(drm_minor_lock); |