[ALSA] oxygen: fix line-in recording selection

The GPIO pin 0 of the CM9780 must be set when muting the line input even
on non-Xonar cards.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

sound/pci/oxygen/oxygen.c

@@ -28,7 +28,9 @@
  * GPIO 1 -> DFS1 of AK5385
  */
 
+#include <linux/mutex.h>
 #include <linux/pci.h>
+#include <sound/ac97_codec.h>
 #include <sound/control.h>
 #include <sound/core.h>
 #include <sound/initval.h>
@@ -37,6 +39,7 @@
 #include <sound/tlv.h>
 #include "oxygen.h"
 #include "ak4396.h"
+#include "cm9780.h"
 
 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
 MODULE_DESCRIPTION("C-Media CMI8788 driver");
@@ -75,6 +78,8 @@ MODULE_DEVICE_TABLE(pci, oxygen_ids);
 #define GPIO_AK5385_DFS_DOUBLE	0x0001
 #define GPIO_AK5385_DFS_QUAD	0x0002
 
+#define GPIO_LINE_MUTE		CM9780_GPO0
+
 #define WM8785_R0	0
 #define WM8785_R1	1
 #define WM8785_R2	2
@@ -180,16 +185,23 @@ static void wm8785_init(struct oxygen *chip)
 	snd_component_add(chip->card, "WM8785");
 }
 
+static void cmi9780_init(struct oxygen *chip)
+{
+	oxygen_ac97_clear_bits(chip, 0, CM9780_GPIO_STATUS, GPIO_LINE_MUTE);
+}
+
 static void generic_init(struct oxygen *chip)
 {
 	ak4396_init(chip);
 	wm8785_init(chip);
+	cmi9780_init(chip);
 }
 
 static void meridian_init(struct oxygen *chip)
 {
 	ak4396_init(chip);
 	ak5385_init(chip);
+	cmi9780_init(chip);
 }
 
 static void generic_cleanup(struct oxygen *chip)
@@ -285,6 +297,27 @@ static void set_ak5385_params(struct oxygen *chip,
 			      value, GPIO_AK5385_DFS_MASK);
 }
 
+static void cmi9780_switch_hook(struct oxygen *chip, unsigned int codec,
+				unsigned int reg, int mute)
+{
+	if (codec != 0)
+		return;
+	switch (reg) {
+	case AC97_LINE:
+		oxygen_write_ac97_masked(chip, 0, CM9780_GPIO_STATUS,
+					 mute ? GPIO_LINE_MUTE : 0,
+					 GPIO_LINE_MUTE);
+		break;
+	case AC97_MIC:
+	case AC97_CD:
+	case AC97_AUX:
+		if (!mute)
+			oxygen_ac97_set_bits(chip, 0, CM9780_GPIO_STATUS,
+					     GPIO_LINE_MUTE);
+		break;
+	}
+}
+
 static const DECLARE_TLV_DB_LINEAR(ak4396_db_scale, TLV_DB_GAIN_MUTE, 0);
 
 static int ak4396_control_filter(struct snd_kcontrol_new *template)
@@ -308,6 +341,7 @@ static const struct oxygen_model model_generic = {
 	.set_adc_params = set_wm8785_params,
 	.update_dac_volume = update_ak4396_volume,
 	.update_dac_mute = update_ak4396_mute,
+	.ac97_switch_hook = cmi9780_switch_hook,
 	.model_data_size = sizeof(struct generic_data),
 	.dac_channels = 8,
 	.used_channels = OXYGEN_CHANNEL_A |
@@ -331,6 +365,7 @@ static const struct oxygen_model model_meridian = {
 	.set_adc_params = set_ak5385_params,
 	.update_dac_volume = update_ak4396_volume,
 	.update_dac_mute = update_ak4396_mute,
+	.ac97_switch_hook = cmi9780_switch_hook,
 	.model_data_size = sizeof(struct generic_data),
 	.dac_channels = 8,
 	.used_channels = OXYGEN_CHANNEL_B |