V4L/DVB (4546): Add u32 argument to VIDIOC_INT_RESET.

The extra argument makes it possible to reset subsystems of a chip if
that is supported.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

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

@@ -174,7 +174,7 @@ static void em28xx_config_i2c(struct em28xx *dev)
 
 	route.input = INPUT(dev->ctl_input)->vmux;
 	route.output = 0;
-	em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
+	em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, 0);
 	em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
 	em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
 

drivers/media/video/pvrusb2/pvrusb2-cx2584x-v4l.c

@@ -221,7 +221,7 @@ static unsigned int decoder_describe(struct pvr2_v4l_cx2584x *ctxt,
 static void decoder_reset(struct pvr2_v4l_cx2584x *ctxt)
 {
 	int ret;
-	ret = pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_RESET,NULL);
+	ret = pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_RESET,0);
 	pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx25840 decoder_reset (ret=%d)",ret);
 }
 

drivers/media/video/v4l2-common.c

@@ -938,6 +938,7 @@ void v4l_printk_ioctl_arg(char *s,unsigned int cmd, void *arg)
 	case VIDIOC_INT_AUDIO_CLOCK_FREQ:
 	case VIDIOC_INT_I2S_CLOCK_FREQ:
 	case VIDIOC_INT_S_STANDBY:
+	case VIDIOC_INT_RESET:
 	{
 		u32 *p=arg;
 

include/media/v4l2-common.h

@@ -169,8 +169,9 @@ enum v4l2_chip_ident {
 #define	VIDIOC_INT_S_REGISTER 		_IOR ('d', 100, struct v4l2_register)
 #define	VIDIOC_INT_G_REGISTER 		_IOWR('d', 101, struct v4l2_register)
 
-/* Reset the I2C chip */
-#define VIDIOC_INT_RESET            	_IO  ('d', 102)
+/* Generic reset command. The argument selects which subsystems to reset.
+   Passing 0 will always reset the whole chip. */
+#define VIDIOC_INT_RESET            	_IOW ('d', 102, u32)
 
 /* Set the frequency (in Hz) of the audio clock output.
    Used to slave an audio processor to the video decoder, ensuring that audio