[PATCH] AC97 2.4.23-pre3 - WM9712 suspend/resume

[PATCH] AC97 2.4.23-pre3 - WM9712 suspend/resume

[Liam Girdwood]

Hi,

This patch eliminates pop noises when doing a PM suspend/resume with the
WM9712 AC97 codec.

It should probably also be applied against the 2.6.0-test series.

Cheers

Liam



diff -urN linux-2.4.23-pre3/drivers/sound/ac97_codec.c
linux-2.4.23-pre3-lg1/drivers/sound/ac97_codec.c
--- linux-2.4.23-pre3/drivers/sound/ac97_codec.c        2003-08-25
12:44:42.000000000 +0100
+++ linux-2.4.23-pre3-lg1/drivers/sound/ac97_codec.c    2003-09-12
15:12:42.000000000 +0100
@@ -1077,6 +1077,11 @@
 /* WM9711, WM9712 */
 static int wolfson_init11(struct ac97_codec * codec)
 {
+       /* stop pop's during suspend/resume */
+       codec->codec_write(codec, AC97_WM97XX_TEST,
+               codec->codec_read(codec, AC97_WM97XX_TEST) & 0xffbf);
+
+
        /* set out3 volume */
        codec->codec_write(codec, AC97_WM9711_OUT3VOL, 0x0808);
        return 0;


-- 
Liam Girdwood <liam.girdwood@wolfsonmicro.com>


Wolfson Microelectronics plc
www.wolfsonmicro.com
T +44 131 272 7000
F +44 131 272 7001
Registered in Scotland 89839

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