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drm: add helper for printing to log or seq_file

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Sometimes it is nice not to duplicate equivalent printk() and
seq_printf() code.

v2: simplify things w/ va_format, and use dev_printk, docs

Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1478358492-30738-3-git-send-email-robdclark@gmail.com
This commit is contained in:
Rob Clark
2016-11-05 11:08:07 -04:00
committed by Sean Paul
parent 65c7dc18b2
commit d8187177b0
4 changed files with 189 additions and 1 deletions
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54
drivers/gpu/drm/drm_print.c Normal file
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/*
* Copyright (C) 2016 Red Hat
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors:
* Rob Clark <robdclark@gmail.com>
*/
#include <stdarg.h>
#include <linux/seq_file.h>
#include <drm/drmP.h>
#include <drm/drm_print.h>
void __drm_printfn_seq_file(struct drm_printer *p, struct va_format *vaf)
{
seq_printf(p->arg, "%pV", vaf);
}
EXPORT_SYMBOL(__drm_printfn_seq_file);
void __drm_printfn_info(struct drm_printer *p, struct va_format *vaf)
{
dev_printk(KERN_INFO, p->arg, "[" DRM_NAME "] %pV", vaf);
}
EXPORT_SYMBOL(__drm_printfn_info);
void drm_printf(struct drm_printer *p, const char *f, ...)
{
struct va_format vaf;
va_list args;
va_start(args, f);
vaf.fmt = f;
vaf.va = &args;
p->printfn(p, &vaf);
va_end(args);
}
EXPORT_SYMBOL(drm_printf);