From 3abee53e4402b6ae39e1e610f9ef94eb74097138 Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <mchehab@infradead.org>
Date: Sat, 5 Jan 2008 17:01:41 -0300
Subject: [PATCH] V4L/DVB (6955): Properly implement 12MHz I2S support

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
---
 drivers/media/video/em28xx/em28xx-cards.c | 20 +++++++++-----------
 drivers/media/video/em28xx/em28xx-core.c  | 11 +++++++++--
 drivers/media/video/em28xx/em28xx-video.c |  7 +++----
 drivers/media/video/em28xx/em28xx.h       |  3 +++
 4 files changed, 24 insertions(+), 17 deletions(-)

diff --git a/drivers/media/video/em28xx/em28xx-cards.c b/drivers/media/video/em28xx/em28xx-cards.c
index 78be0dc25720..1011813ad7c2 100644
--- a/drivers/media/video/em28xx/em28xx-cards.c
+++ b/drivers/media/video/em28xx/em28xx-cards.c
@@ -174,13 +174,14 @@ struct em28xx_board em28xx_boards[] = {
 		} },
 	},
 	[EM2880_BOARD_HAUPPAUGE_WINTV_HVR_950] = {
-		.name         = "Hauppauge WinTV HVR 950",
-		.vchannels    = 3,
-		.tda9887_conf = TDA9887_PRESENT,
-		.tuner_type   = TUNER_XC2028,
-		.has_tuner    = 1,
-		.mts_firmware = 1,
-		.decoder      = EM28XX_TVP5150,
+		.name           = "Hauppauge WinTV HVR 950",
+		.vchannels      = 3,
+		.tda9887_conf   = TDA9887_PRESENT,
+		.tuner_type     = TUNER_XC2028,
+		.has_tuner      = 1,
+		.mts_firmware   = 1,
+		.has_12mhz_i2s  = 1,
+		.decoder        = EM28XX_TVP5150,
 		.input          = { {
 			.type     = EM28XX_VMUX_TELEVISION,
 			.vmux     = TVP5150_COMPOSITE0,
@@ -641,6 +642,7 @@ static void em28xx_set_model(struct em28xx *dev)
 	dev->decoder = em28xx_boards[dev->model].decoder;
 	dev->video_inputs = em28xx_boards[dev->model].vchannels;
 	dev->analog_gpio = em28xx_boards[dev->model].analog_gpio;
+	dev->has_12mhz_i2s = em28xx_boards[dev->model].has_12mhz_i2s;
 
 	if (!em28xx_boards[dev->model].has_tuner)
 		dev->tuner_type = UNSET;
@@ -676,10 +678,6 @@ void em28xx_card_setup(struct em28xx *dev)
 		if (tv.has_ir)
 			request_module("ir-kbd-i2c");
 #endif
-		/* enable audio 12 mhz i2s */
-		em28xx_write_regs(dev, XCLK_REG, "\xa7", 1);
-		msleep(10);
-
 		break;
 	}
 	case EM2820_BOARD_KWORLD_PVRTV2800RF:
diff --git a/drivers/media/video/em28xx/em28xx-core.c b/drivers/media/video/em28xx/em28xx-core.c
index 70c5ec268f6a..f6b78357f0e5 100644
--- a/drivers/media/video/em28xx/em28xx-core.c
+++ b/drivers/media/video/em28xx/em28xx-core.c
@@ -332,6 +332,7 @@ int em28xx_audio_analog_set(struct em28xx *dev)
 {
 	int ret;
 	char s[2] = { 0x00, 0x00 };
+	u8 xclk = 0x07;
 
 	s[0] |= 0x1f - dev->volume;
 	s[1] |= 0x1f - dev->volume;
@@ -342,10 +343,16 @@ int em28xx_audio_analog_set(struct em28xx *dev)
 	if (ret < 0)
 		return ret;
 
-	ret = em28xx_write_reg_bits(dev, XCLK_REG,
-				    dev->mute ? 0x00 : 0x80, 0x80);
+	if (dev->has_12mhz_i2s)
+		xclk |= 0x20;
+
+	if (!dev->mute)
+		xclk |= 0x80;
+
+	ret = em28xx_write_reg_bits(dev, XCLK_REG, xclk, 0xa7);
 	if (ret < 0)
 		return ret;
+	msleep(10);
 
 	/* Selects the proper audio input */
 	ret = em28xx_set_audio_source(dev);
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c
index a03e9d724b5f..0f075f532eae 100644
--- a/drivers/media/video/em28xx/em28xx-video.c
+++ b/drivers/media/video/em28xx/em28xx-video.c
@@ -125,10 +125,6 @@ static int em28xx_config(struct em28xx *dev)
 	dev->mute = 1;		/* maybe not the right place... */
 	dev->volume = 0x1f;
 
-	/* Init XCLK_REG, audio muted */
-	dev->em28xx_write_regs(dev, XCLK_REG, "\x87", 1);
-
-	em28xx_audio_analog_set(dev);
 	em28xx_outfmt_set_yuv422(dev);
 	em28xx_colorlevels_set_default(dev);
 	em28xx_compression_disable(dev);
@@ -1688,6 +1684,9 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
 	/* Do board specific init and eeprom reading */
 	em28xx_card_setup(dev);
 
+	/* Configure audio */
+	em28xx_audio_analog_set(dev);
+
 	/* configure the device */
 	em28xx_config_i2c(dev);
 
diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h
index 9eb213132da1..2d57330c4537 100644
--- a/drivers/media/video/em28xx/em28xx.h
+++ b/drivers/media/video/em28xx/em28xx.h
@@ -184,6 +184,8 @@ struct em28xx_board {
 	unsigned int has_tuner:1;
 	unsigned int has_msp34xx:1;
 	unsigned int mts_firmware:1;
+	unsigned int has_12mhz_i2s:1;
+
 	unsigned int analog_gpio;
 
 	enum em28xx_decoder decoder;
@@ -247,6 +249,7 @@ struct em28xx {
 	unsigned int has_tda9887:1;
 	unsigned int stream_on:1;	/* Locks streams */
 	unsigned int has_audio_class:1;
+	unsigned int has_12mhz_i2s:1;
 
 	int video_inputs;	/* number of video inputs */
 	struct list_head	devlist;
-- 
2.34.1