[34-longterm 134/196] ALSA: powermac - Reverse HP detection on G4 DA

[Paul Gortmaker]

From: Risto Suominen <Risto.Suominen@xxxxxxxxx>

                   -------------------
    This is a commit scheduled for the next v2.6.34 longterm release.
    If you see a problem with using this for longterm, please comment.
                   -------------------

commit 819ef70b135ba66cd1659c913255686bf931e3d4 upstream.

Reverse headphone detection bit on PowerMac G4 Digital Audio (Tumbler).

Signed-off-by: Risto Suominen <Risto.Suominen@xxxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
---
 sound/ppc/tumbler.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sound/ppc/tumbler.c b/sound/ppc/tumbler.c
index 789f44f..3b7471c 100644
--- a/sound/ppc/tumbler.c
+++ b/sound/ppc/tumbler.c
@@ -30,6 +30,7 @@
 #include <linux/kmod.h>
 #include <linux/slab.h>
 #include <linux/interrupt.h>
+#include <linux/string.h>
 #include <sound/core.h>
 #include <asm/io.h>
 #include <asm/irq.h>
@@ -46,6 +47,8 @@
 #define DBG(fmt...)
 #endif
 
+#define IS_G4DA (machine_is_compatible("PowerMac3,4"))
+
 /* i2c address for tumbler */
 #define TAS_I2C_ADDR	0x34
 
@@ -1134,7 +1137,7 @@ static long tumbler_find_device(const char *device, const char *platform,
 		gp->inactive_val = (*base) ? 0x4 : 0x5;
 	} else {
 		const u32 *prop = NULL;
-		gp->active_state = 0;
+		gp->active_state = IS_G4DA && !strcmp(device, "keywest-gpio15");
 		gp->active_val = 0x4;
 		gp->inactive_val = 0x5;
 		/* Here are some crude hacks to extract the GPIO polarity and
-- 
1.7.9.3

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