From: Liam Girdwood <Liam.Girdwood@wolfsonmicro.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: lkml <linux-kernel@vger.kernel.org>
Subject: [PATCH 1/2] AC97 plugin suspend/resume
Date: Tue, 04 Jan 2005 14:50:43 +0000 [thread overview]
Message-ID: <1104850243.9143.333.camel@cearnarfon> (raw)
[-- Attachment #1: Type: text/plain, Size: 253 bytes --]
This patch adds suspend and resume support to OSS AC97 plugins.
Changes :-
o added suspend/resume callbacks to struct ac97_driver
o added suspend/resume handlers to ac97_codec.c
Signed-off-by: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
Liam
[-- Attachment #2: ac97_codec_pm.diff --]
[-- Type: text/x-patch, Size: 1755 bytes --]
--- a/sound/oss/ac97_codec.c 2004-12-24 21:34:00.000000000 +0000
+++ b/sound/oss/ac97_codec.c 2004-12-08 17:08:42.000000000 +0000
@@ -1391,6 +1421,33 @@
EXPORT_SYMBOL(ac97_restore_state);
+int ac97_suspend(struct ac97_codec *codec, int state)
+{
+ struct ac97_driver *driver;
+ int ret = 0;
+
+ down(&codec_sem);
+ driver = codec->driver;
+ if (driver != NULL && driver->suspend)
+ ret = driver->suspend(codec, state);
+ up(&codec_sem);
+
+ return ret;
+}
+EXPORT_SYMBOL(ac97_suspend);
+
+void ac97_resume(struct ac97_codec *codec)
+{
+ struct ac97_driver *driver;
+
+ down(&codec_sem);
+ driver = codec->driver;
+ if (driver != NULL && driver->resume)
+ driver->resume(codec);
+ up(&codec_sem);
+}
+EXPORT_SYMBOL(ac97_resume);
+
/**
* ac97_register_driver - register a codec helper
* @driver: Driver handler
--- a/include/linux/ac97_codec.h 2004-12-24 21:33:50.000000000 +0000
+++ b/include/linux/ac97_codec.h 2004-12-08 13:28:42.000000000 +0000
@@ -299,6 +300,8 @@
extern unsigned int ac97_set_dac_rate(struct ac97_codec *codec, unsigned int rate);
extern int ac97_save_state(struct ac97_codec *codec);
extern int ac97_restore_state(struct ac97_codec *codec);
+extern int ac97_suspend(struct ac97_codec *codec, int state);
+extern void ac97_resume(struct ac97_codec *codec);
extern struct ac97_codec *ac97_alloc_codec(void);
extern void ac97_release_codec(struct ac97_codec *codec);
@@ -310,6 +313,8 @@
u32 codec_mask;
int (*probe) (struct ac97_codec *codec, struct ac97_driver *driver);
void (*remove) (struct ac97_codec *codec, struct ac97_driver *driver);
+ int (*suspend) (struct ac97_codec *codec, int state);
+ void (*resume) (struct ac97_codec *codec);
};
extern int ac97_register_driver(struct ac97_driver *driver);
next reply other threads:[~2005-01-04 14:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-04 14:50 Liam Girdwood [this message]
2005-01-04 15:19 ` [PATCH 1/2] AC97 plugin suspend/resume Russell King
2005-01-04 15:55 ` Liam Girdwood
2005-01-04 16:06 ` Russell King
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