Commit a41231d5 authored Nov 16, 2016 by Mauro Carvalho Chehab

[media] v4l2-common: add a debug macro to be used with dev_foo()



Currently, there's a mess at the V4L2 printk macros: some drivers
use their own macros, others use pr_foo() or v4l_foo() macros,
while more modern drivers use dev_foo() macros.

The best is to get rid of v4l_foo() macros, as they can be
replaced by either dev_foo() or pr_foo(). Yet, such change can
be disruptive, as dev_foo() cannot use KERN_CONT. So, the best
is to do such change driver by driver.

There are replacements for most v4l_foo() macros, but it lacks
a way to enable debug messages per level. So, add such macro,
in order to make the conversion easier.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

parent 680d87c0

include/media/v4l2-common.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -55,6 +55,13 @@
		v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \
		} while (0)

		/* Add a version of v4l_dbg to be used on drivers using dev_foo() macros */
		#define dev_dbg_lvl(__dev, __level, __debug, __fmt, __arg...) \
		do { \
		if (__debug >= (__level)) \
		dev_printk(KERN_DEBUG, __dev, __fmt, ##__arg); \
		} while (0)

		/* ------------------------------------------------------------------------- */

		/* These printk constructs can be used with v4l2_device and v4l2_subdev */