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authorEzequiel Garcia <ezequiel@vanguardiasur.com.ar>2016-04-20 13:45:03 -0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2016-04-21 09:45:12 +0200
commit6dc3e22ee197095eb6a6b3119f04f9dc6c2bbf91 (patch)
tree64b0516dd4d694e6d623b6fc3b9a7e2c3191cfd1
parent14ba00316543bb67c81202fd475b605bfa410967 (diff)
drm: Make drm.debug parameter description more helpfultopic/drm-misc-2016-04-21
Let's be user-friendly and print an actually helpful parameter description. This makes modinfo output the debug parameter like this: parm: debug:Enable debug output, where each bit enables a debug category. Bit 0 (0x01) will enable CORE messages (drm core code) Bit 1 (0x02) will enable DRIVER messages (drm controller code) Bit 2 (0x04) will enable KMS messages (modesetting code) Bit 3 (0x08) will enable PRIME messages (prime code) Bit 4 (0x10) will enable ATOMIC messages (atomic code) Bit 5 (0x20) will enable VBL messages (vblank code) (int) Changes from v1: * Fixed s/PRMIE/PRIME typo. * Add ATOMIC and VBL debug parameter documentation. * Prefix the continuation lines with two tabs and removed the last new line. * Remove spurious whitespace. Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1461170703-11216-1-git-send-email-ezequiel@vanguardiasur.com.ar
-rw-r--r--drivers/gpu/drm/drm_drv.c14
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);