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Commit 06f292e4 authored by Kuninori Morimoto's avatar Kuninori Morimoto Committed by Mauro Carvalho Chehab
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V4L/DVB (13654): tw9910: Tri-state pins when idle 



Tri-state all pins when not streaming to save power.

Signed-off-by: default avatarKuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 88a67c51

drivers/media/video/tw9910.c

+30 −13
Original line number Original line Diff line number Diff line
@@ -152,7 +152,10 @@ 
			 /* 1 : non-auto */

			 /* 1 : non-auto */

#define VSCTL       0x08 /* 1 : Vertical out ctrl by DVALID */

#define VSCTL       0x08 /* 1 : Vertical out ctrl by DVALID */

			 /* 0 : Vertical out ctrl by HACTIVE and DVALID */

			 /* 0 : Vertical out ctrl by HACTIVE and DVALID */

#define OEN         0x04 /* Output Enable together with TRI_SEL. */

#define OEN_TRI_SEL_MASK	0x07

#define OEN_TRI_SEL_ALL_ON	0x00 /* Enable output for Rev0/Rev1 */

#define OEN_TRI_SEL_ALL_OFF_r0	0x06 /* All tri-stated for Rev0 */

#define OEN_TRI_SEL_ALL_OFF_r1	0x07 /* All tri-stated for Rev1 */





/* OUTCTR1 */

/* OUTCTR1 */

#define VSP_LO      0x00 /* 0 : VS pin output polarity is active low */

#define VSP_LO      0x00 /* 0 : VS pin output polarity is active low */
@@ -236,7 +239,6 @@ struct tw9910_priv { 




static const struct regval_list tw9910_default_regs[] =

static const struct regval_list tw9910_default_regs[] =

{

{

	{ OPFORM,  0x00 },

	{ OUTCTR1, VSP_LO | VSSL_VVALID | HSP_HI | HSSL_HSYNC },

	{ OUTCTR1, VSP_LO | VSSL_VVALID | HSP_HI | HSSL_HSYNC },

	ENDMARKER,

	ENDMARKER,

};

};
@@ -519,8 +521,22 @@ static int tw9910_s_stream(struct v4l2_subdev *sd, int enable) 
	struct i2c_client *client = sd->priv;

	struct i2c_client *client = sd->priv;

	struct tw9910_priv *priv = to_tw9910(client);

	struct tw9910_priv *priv = to_tw9910(client);





	if (!enable)

	u8 val;

		return 0;



	if (!enable) {

		switch (priv->revision) {

		case 0:

			val = OEN_TRI_SEL_ALL_OFF_r0;

			break;

		case 1:

			val = OEN_TRI_SEL_ALL_OFF_r1;

			break;

		default:

			dev_err(&client->dev, "un-supported revision\n");

			return -EINVAL;

		}

	} else {

		val = OEN_TRI_SEL_ALL_ON;





		if (!priv->scale) {

		if (!priv->scale) {

			dev_err(&client->dev, "norm select error\n");

			dev_err(&client->dev, "norm select error\n");
@@ -531,8 +547,9 @@ static int tw9910_s_stream(struct v4l2_subdev *sd, int enable) 
			priv->scale->name,

			priv->scale->name,

			priv->scale->width,

			priv->scale->width,

			priv->scale->height);

			priv->scale->height);

	}





	return 0;

	return tw9910_mask_set(client, OPFORM, OEN_TRI_SEL_MASK, val);

}

}





static int tw9910_set_bus_param(struct soc_camera_device *icd,

static int tw9910_set_bus_param(struct soc_camera_device *icd,