[PATCH v2] drm: Make drm.debug parameter description more helpful

[Daniel Vetter]

On Thu, Apr 21, 2016 at 10:32:11AM +0300, Jani Nikula wrote:
> On Wed, 20 Apr 2016, Ezequiel Garcia <ezequiel at vanguardiasur.com.ar> wrote:
> > 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)
> >
> > Signed-off-by: Ezequiel Garcia <ezequiel at vanguardiasur.com.ar>
> 
> Reviewed-by: Jani Nikula <jani.nikula at intel.com>

Applied to drm-misc, thanks.
-Daniel

> 
> 
> 
> > --
> > 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.
> >
> >  drivers/gpu/drm/drm_drv.c | 14 ++++++++++++--
> >  1 file changed, 12 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
> > index 167c8d3d4a31..c4f45ac04ea4 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);
> 
> -- 
> Jani Nikula, Intel Open Source Technology Center
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> dri-devel at lists.freedesktop.org
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch