[PATCH] Special AC97 patch for ASUS W1000/CMI9739 laptop.

[James Courtier-Dutton <James@superbug.co.uk>]

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This patch fixes sound output on the ASUS W1000 laptop with the CMI9739 
chip. It wrongly reports that it has a SPDIF in, when in fact we wish to 
use the EAPD pin.

Signed off: James@superbug.demon.co.uk

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Index: alsa-driver/alsa-kernel/pci/ac97/ac97_patch.c
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/pci/ac97/ac97_patch.c,v
retrieving revision 1.70
diff -u -r1.70 ac97_patch.c
--- alsa-driver/alsa-kernel/pci/ac97/ac97_patch.c	20 Jan 2005 11:43:19 -0000	1.70
+++ alsa-driver/alsa-kernel/pci/ac97/ac97_patch.c	23 Jan 2005 16:04:31 -0000
@@ -1916,6 +1916,15 @@
 	/* FIXME: set up GPIO */
 	snd_ac97_write_cache(ac97, 0x70, 0x0100);
 	snd_ac97_write_cache(ac97, 0x72, 0x0020);
+	/* Special exception for ASUS W1000/CMI9739. It does not have an SPDIF in. */
+	if (ac97->pci &&
+	     ac97->subsystem_vendor == 0x1043 &&
+	     ac97->subsystem_device == 0x1843) {
+		snd_ac97_write_cache(ac97, AC97_CM9739_SPDIF_CTRL,
+			snd_ac97_read(ac97, AC97_CM9739_SPDIF_CTRL) & ~0x01);
+		snd_ac97_write_cache(ac97, AC97_CM9739_MULTI_CHAN,
+			snd_ac97_read(ac97, AC97_CM9739_MULTI_CHAN) | (1 << 14));
+	}
 
 	return 0;
 }