Commit 6dc3e22e authored Apr 20, 2016 by Ezequiel Garcia Committed by Daniel Vetter Apr 21, 2016

drm: Make drm.debug parameter description more helpful



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

parent 14ba0031

drivers/gpu/drm/drm_drv.c

+12 −2

Original line number	Diff line number	Diff line
		@@ -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);