V4L/DVB (3233): Fixed API to set I2S speed control

- Created a new ioctl to control I2S speed. Old calls to an
inadequate V4L2 API replaced.
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>

drivers/media/video/em28xx/em28xx-cards.c

@@ -30,6 +30,7 @@
 #include <media/tuner.h>
 #include <media/audiochip.h>
 #include <media/tveeprom.h>
+#include <media/v4l2-common.h>
 #include "msp3400.h"
 
 #include "em28xx.h"
@@ -261,7 +262,6 @@ void em28xx_card_setup(struct em28xx *dev)
 	/* request some modules */
 	if (dev->model == EM2820_BOARD_HAUPPAUGE_WINTV_USB_2) {
 		struct tveeprom tv;
-		struct v4l2_audioout ao;
 #ifdef CONFIG_MODULES
 		request_module("tveeprom");
 		request_module("ir-kbd-i2c");
@@ -274,12 +274,8 @@ void em28xx_card_setup(struct em28xx *dev)
 
 		dev->tuner_type= tv.tuner_type;
 		if (tv.audio_processor == AUDIO_CHIP_MSP34XX) {
+			dev->i2s_speed=2048000;
 			dev->has_msp34xx=1;
-			memset (&ao,0,sizeof(ao));
-
-			ao.index=2;
-			ao.mode=V4L2_AUDMODE_32BITS;
-			em28xx_i2c_call_clients(dev, VIDIOC_S_AUDOUT, &ao);
 		} else
 			dev->has_msp34xx=0;
 	}

drivers/media/video/em28xx/em28xx-video.c

@@ -287,6 +287,8 @@ static void video_mux(struct em28xx *dev, int index)
 	em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,input,dev->ctl_ainput);
 
 	if (dev->has_msp34xx) {
+		if (dev->i2s_speed)
+			em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
 		em28xx_i2c_call_clients(dev, VIDIOC_S_AUDIO, &dev->ctl_ainput);
 		ainput = EM28XX_AUDIO_SRC_TUNER;
 		em28xx_audio_source(dev, ainput);

drivers/media/video/em28xx/em28xx.h

@@ -216,6 +216,8 @@ struct em28xx {
 	unsigned int has_msp34xx:1;
 	unsigned int has_tda9887:1;
 
+	u32 i2s_speed;		/* I2S speed for audio digital stream */
+
 	enum em28xx_decoder decoder;
 
 	int tuner_type;		/* type of the tuner */

drivers/media/video/msp3400.c

@@ -54,6 +54,7 @@
 
 #include <linux/videodev.h>
 #include <media/audiochip.h>
+#include <media/v4l2-common.h>
 #include "msp3400.h"
 
 /* ---------------------------------------------------------------------- */
@@ -2104,23 +2105,36 @@ static int msp_command(struct i2c_client *client, unsigned int cmd, void *arg)
 		if (a->index<0||a->index>2)
 			return -EINVAL;
 
-		if (a->index==2) {
-			if (a->mode == V4L2_AUDMODE_32BITS)
-				msp->i2s_mode=1;
-			else
-				msp->i2s_mode=0;
-		}
-		msp3400_dbg("Setting audio out on msp34xx to input %i, mode %i\n",a->index,msp->i2s_mode);
+		msp3400_dbg("Setting audio out on msp34xx to input %i\n",a->index);
 		msp3400c_set_scart(client,msp->in_scart,a->index+1);
 
 		break;
 	}
+	case VIDIOC_INT_I2S_CLOCK_FREQ:
+	{
+		u32 *a=(u32 *)arg;
+
+		msp3400_dbg("Setting I2S speed to %d\n",*a);
+
+		switch (*a) {
+			case 1024000:
+				msp->i2s_mode=0;
+				break;
+			case 2048000:
+				msp->i2s_mode=1;
+				break;
+			default:
+				return -EINVAL;
+		}
+		break;
+	}
+
 	case VIDIOC_QUERYCTRL:
 	{
 		struct v4l2_queryctrl *qc = arg;
 		int i;
 
-		msp3400_dbg("VIDIOC_QUERYCTRL");
+		msp3400_dbg("VIDIOC_QUERYCTRL\n");
 
 		for (i = 0; i < ARRAY_SIZE(msp34xx_qctrl); i++)
 			if (qc->id && qc->id ==  msp34xx_qctrl[i].id) {

include/linux/videodev2.h

@@ -895,7 +895,6 @@ struct v4l2_audio
 
 /*  Flags for the 'mode' field */
 #define V4L2_AUDMODE_AVL		0x00001
-#define V4L2_AUDMODE_32BITS		0x00002
 
 struct v4l2_audioout
 {

include/media/v4l2-common.h

@@ -107,4 +107,11 @@ enum v4l2_chip_ident {
    be made. */
 #define VIDIOC_INT_G_CHIP_IDENT		_IOR ('d', 107, enum v4l2_chip_ident *)
 
+/* Sets I2S speed in bps. This is used to provide a standard way to select I2S
+   clock used by driving digital audio streams at some board designs.
+   Usual values for the frequency are 1024000 and 2048000.
+   If the frequency is not supported, then -EINVAL is returned. */
+#define VIDIOC_INT_I2S_CLOCK_FREQ 	_IOW ('d', 108, u32)
+
+
 #endif /* V4L2_COMMON_H_ */