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[media] soc-camera: Push probe-time power management to drivers 

Several client drivers access the hardware at probe time, for instance
to read the probe chip ID. Such chips need to be powered up when being
probed.

soc-camera handles this by powering chips up in the soc-camera probe
implementation. However, this will break with non soc-camera hosts that
don't perform the same operations.

Fix the problem by pushing the power up/down from the soc-camera core
down to individual drivers on a needs basis.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Laurent Pinchart 2012-07-18 10:54:04 -03:00 committed by Mauro Carvalho Chehab
parent 4ec10bacd6
commit 4bbc6d52e6
15 changed files with 204 additions and 123 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/media/i2c/soc_camera/imx074.c
View File

@ -310,26 +310,33 @@ static struct v4l2_subdev_ops imx074_subdev_ops = {
static int imx074_video_probe(struct i2c_client *client)
{
struct v4l2_subdev *subdev = i2c_get_clientdata(client);
int ret;
u16 id;
ret = imx074_s_power(subdev, 1);
if (ret < 0)
return ret;
/* Read sensor Model ID */
ret = reg_read(client, 0);
if (ret < 0)
return ret;
goto done;
id = ret << 8;
ret = reg_read(client, 1);
if (ret < 0)
return ret;
goto done;
id |= ret;
dev_info(&client->dev, "Chip ID 0x%04x detected\n", id);
if (id != 0x74)
return -ENODEV;
if (id != 0x74) {
ret = -ENODEV;
goto done;
}
/* PLL Setting EXTCLK=24MHz, 22.5times */
reg_write(client, PLL_MULTIPLIER, 0x2D);
@ -411,7 +418,11 @@ static int imx074_video_probe(struct i2c_client *client)
reg_write(client, GROUPED_PARAMETER_HOLD, 0x00); /* off */
return 0;
ret = 0;
done:
imx074_s_power(subdev, 0);
return ret;
}
static int imx074_probe(struct i2c_client *client,

17
drivers/media/i2c/soc_camera/mt9m001.c
View File

@ -490,6 +490,10 @@ static int mt9m001_video_probe(struct soc_camera_link *icl,
unsigned long flags;
int ret;
ret = mt9m001_s_power(&mt9m001->subdev, 1);
if (ret < 0)
return ret;
/* Enable the chip */
data = reg_write(client, MT9M001_CHIP_ENABLE, 1);
dev_dbg(&client->dev, "write: %d\n", data);
@ -511,7 +515,8 @@ static int mt9m001_video_probe(struct soc_camera_link *icl,
default:
dev_err(&client->dev,
"No MT9M001 chip detected, register read %x\n", data);
return -ENODEV;
ret = -ENODEV;
goto done;
}
mt9m001->num_fmts = 0;
@ -540,11 +545,17 @@ static int mt9m001_video_probe(struct soc_camera_link *icl,
data == 0x8431 ? "C12STM" : "C12ST");
ret = mt9m001_init(client);
if (ret < 0)
if (ret < 0) {
dev_err(&client->dev, "Failed to initialise the camera\n");
goto done;
}
/* mt9m001_init() has reset the chip, returning registers to defaults */
return v4l2_ctrl_handler_setup(&mt9m001->hdl);
ret = v4l2_ctrl_handler_setup(&mt9m001->hdl);
done:
mt9m001_s_power(&mt9m001->subdev, 0);
return ret;
}
static void mt9m001_video_remove(struct soc_camera_link *icl)

80
drivers/media/i2c/soc_camera/mt9m111.c
View File

@ -796,41 +796,6 @@ static int mt9m111_init(struct mt9m111 *mt9m111)
return ret;
}
/*
* Interface active, can use i2c. If it fails, it can indeed mean, that
* this wasn't our capture interface, so, we wait for the right one
*/
static int mt9m111_video_probe(struct i2c_client *client)
{
struct mt9m111 *mt9m111 = to_mt9m111(client);
s32 data;
int ret;
data = reg_read(CHIP_VERSION);
switch (data) {
case 0x143a: /* MT9M111 or MT9M131 */
mt9m111->model = V4L2_IDENT_MT9M111;
dev_info(&client->dev,
"Detected a MT9M111/MT9M131 chip ID %x\n", data);
break;
case 0x148c: /* MT9M112 */
mt9m111->model = V4L2_IDENT_MT9M112;
dev_info(&client->dev, "Detected a MT9M112 chip ID %x\n", data);
break;
default:
dev_err(&client->dev,
"No MT9M111/MT9M112/MT9M131 chip detected register read %x\n",
data);
return -ENODEV;
}
ret = mt9m111_init(mt9m111);
if (ret)
return ret;
return v4l2_ctrl_handler_setup(&mt9m111->hdl);
}
static int mt9m111_power_on(struct mt9m111 *mt9m111)
{
struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
@ -941,6 +906,51 @@ static struct v4l2_subdev_ops mt9m111_subdev_ops = {
.video = &mt9m111_subdev_video_ops,
};
/*
* Interface active, can use i2c. If it fails, it can indeed mean, that
* this wasn't our capture interface, so, we wait for the right one
*/
static int mt9m111_video_probe(struct i2c_client *client)
{
struct mt9m111 *mt9m111 = to_mt9m111(client);
s32 data;
int ret;
ret = mt9m111_s_power(&mt9m111->subdev, 1);
if (ret < 0)
return ret;
data = reg_read(CHIP_VERSION);
switch (data) {
case 0x143a: /* MT9M111 or MT9M131 */
mt9m111->model = V4L2_IDENT_MT9M111;
dev_info(&client->dev,
"Detected a MT9M111/MT9M131 chip ID %x\n", data);
break;
case 0x148c: /* MT9M112 */
mt9m111->model = V4L2_IDENT_MT9M112;
dev_info(&client->dev, "Detected a MT9M112 chip ID %x\n", data);
break;
default:
dev_err(&client->dev,
"No MT9M111/MT9M112/MT9M131 chip detected register read %x\n",
data);
ret = -ENODEV;
goto done;
}
ret = mt9m111_init(mt9m111);
if (ret)
goto done;
ret = v4l2_ctrl_handler_setup(&mt9m111->hdl);
done:
mt9m111_s_power(&mt9m111->subdev, 0);
return ret;
}
static int mt9m111_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{

37
drivers/media/i2c/soc_camera/mt9t031.c
View File

@ -161,14 +161,6 @@ static int mt9t031_idle(struct i2c_client *client)
return ret >= 0 ? 0 : -EIO;
}
static int mt9t031_disable(struct i2c_client *client)
{
/* Disable the chip */
reg_clear(client, MT9T031_OUTPUT_CONTROL, 2);
return 0;
}
static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
@ -643,9 +635,15 @@ static int mt9t031_video_probe(struct i2c_client *client)
s32 data;
int ret;
/* Enable the chip */
data = reg_write(client, MT9T031_CHIP_ENABLE, 1);
dev_dbg(&client->dev, "write: %d\n", data);
ret = mt9t031_s_power(&mt9t031->subdev, 1);
if (ret < 0)
return ret;
ret = mt9t031_idle(client);
if (ret < 0) {
dev_err(&client->dev, "Failed to initialise the camera\n");
goto done;
}
/* Read out the chip version register */
data = reg_read(client, MT9T031_CHIP_VERSION);
@ -657,16 +655,16 @@ static int mt9t031_video_probe(struct i2c_client *client)
default:
dev_err(&client->dev,
"No MT9T031 chip detected, register read %x\n", data);
return -ENODEV;
ret = -ENODEV;
goto done;
}
dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data);
ret = mt9t031_idle(client);
if (ret < 0)
dev_err(&client->dev, "Failed to initialise the camera\n");
else
v4l2_ctrl_handler_setup(&mt9t031->hdl);
ret = v4l2_ctrl_handler_setup(&mt9t031->hdl);
done:
mt9t031_s_power(&mt9t031->subdev, 0);
return ret;
}
@ -817,12 +815,7 @@ static int mt9t031_probe(struct i2c_client *client,
mt9t031->xskip = 1;
mt9t031->yskip = 1;
mt9t031_idle(client);
ret = mt9t031_video_probe(client);
mt9t031_disable(client);
if (ret) {
v4l2_ctrl_handler_free(&mt9t031->hdl);
kfree(mt9t031);

12
drivers/media/i2c/soc_camera/mt9t112.c
View File

@ -1041,6 +1041,11 @@ static int mt9t112_camera_probe(struct i2c_client *client)
struct mt9t112_priv *priv = to_mt9t112(client);
const char *devname;
int chipid;
int ret;
ret = mt9t112_s_power(&priv->subdev, 1);
if (ret < 0)
return ret;
/*
* check and show chip ID
@ -1058,12 +1063,15 @@ static int mt9t112_camera_probe(struct i2c_client *client)
break;
default:
dev_err(&client->dev, "Product ID error %04x\n", chipid);
return -ENODEV;
ret = -ENODEV;
goto done;
}
dev_info(&client->dev, "%s chip ID %04x\n", devname, chipid);
return 0;
done:
mt9t112_s_power(&priv->subdev, 0);
return ret;
}
static int mt9t112_probe(struct i2c_client *client,

5
drivers/media/i2c/soc_camera/mt9v022.c
View File

@ -578,6 +578,10 @@ static int mt9v022_video_probe(struct i2c_client *client)
int ret;
unsigned long flags;
ret = mt9v022_s_power(&mt9v022->subdev, 1);
if (ret < 0)
return ret;
/* Read out the chip version register */
data = reg_read(client, MT9V022_CHIP_VERSION);
@ -648,6 +652,7 @@ static int mt9v022_video_probe(struct i2c_client *client)
dev_err(&client->dev, "Failed to initialise the camera\n");
ei2c:
mt9v022_s_power(&mt9v022->subdev, 0);
return ret;
}

11
drivers/media/i2c/soc_camera/ov2640.c
View File

@ -955,6 +955,10 @@ static int ov2640_video_probe(struct i2c_client *client)
const char *devname;
int ret;
ret = ov2640_s_power(&priv->subdev, 1);
if (ret < 0)
return ret;
/*
* check and show product ID and manufacturer ID
*/
@ -973,16 +977,17 @@ static int ov2640_video_probe(struct i2c_client *client)
dev_err(&client->dev,
"Product ID error %x:%x\n", pid, ver);
ret = -ENODEV;
goto err;
goto done;
}
dev_info(&client->dev,
"%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
devname, pid, ver, midh, midl);
return v4l2_ctrl_handler_setup(&priv->hdl);
ret = v4l2_ctrl_handler_setup(&priv->hdl);
err:
done:
ov2640_s_power(&priv->subdev, 0);
return ret;
}

21
drivers/media/i2c/soc_camera/ov5642.c
View File

@ -980,29 +980,40 @@ static struct v4l2_subdev_ops ov5642_subdev_ops = {
static int ov5642_video_probe(struct i2c_client *client)
{
struct v4l2_subdev *subdev = i2c_get_clientdata(client);
int ret;
u8 id_high, id_low;
u16 id;
ret = ov5642_s_power(subdev, 1);
if (ret < 0)
return ret;
/* Read sensor Model ID */
ret = reg_read(client, REG_CHIP_ID_HIGH, &id_high);
if (ret < 0)
return ret;
goto done;
id = id_high << 8;
ret = reg_read(client, REG_CHIP_ID_LOW, &id_low);
if (ret < 0)
return ret;
goto done;
id |= id_low;
dev_info(&client->dev, "Chip ID 0x%04x detected\n", id);
if (id != 0x5642)
return -ENODEV;
if (id != 0x5642) {
ret = -ENODEV;
goto done;
}
return 0;
ret = 0;
done:
ov5642_s_power(subdev, 0);
return ret;
}
static int ov5642_probe(struct i2c_client *client,

19
drivers/media/i2c/soc_camera/ov6650.c
View File

@ -829,8 +829,13 @@ static int ov6650_prog_dflt(struct i2c_client *client)
static int ov6650_video_probe(struct i2c_client *client)
{
struct ov6650 *priv = to_ov6650(client);
u8 pidh, pidl, midh, midl;
int ret = 0;
int ret;
ret = ov6650_s_power(&priv->subdev, 1);
if (ret < 0)
return ret;
/*
* check and show product ID and manufacturer ID
@ -844,12 +849,13 @@ static int ov6650_video_probe(struct i2c_client *client)
ret = ov6650_reg_read(client, REG_MIDL, &midl);
if (ret)
return ret;
goto done;
if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) {
dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n",
pidh, pidl);
return -ENODEV;
ret = -ENODEV;
goto done;
}
dev_info(&client->dev,
@ -859,7 +865,11 @@ static int ov6650_video_probe(struct i2c_client *client)
ret = ov6650_reset(client);
if (!ret)
ret = ov6650_prog_dflt(client);
if (!ret)
ret = v4l2_ctrl_handler_setup(&priv->hdl);
done:
ov6650_s_power(&priv->subdev, 0);
return ret;
}
@ -1019,9 +1029,6 @@ static int ov6650_probe(struct i2c_client *client,
priv->colorspace = V4L2_COLORSPACE_JPEG;
ret = ov6650_video_probe(client);
if (!ret)
ret = v4l2_ctrl_handler_setup(&priv->hdl);
if (ret) {
v4l2_ctrl_handler_free(&priv->hdl);
kfree(priv);

14
drivers/media/i2c/soc_camera/ov772x.c
View File

@ -962,6 +962,11 @@ static int ov772x_video_probe(struct i2c_client *client)
struct ov772x_priv *priv = to_ov772x(client);
u8 pid, ver;
const char *devname;
int ret;
ret = ov772x_s_power(&priv->subdev, 1);
if (ret < 0)
return ret;
/*
* check and show product ID and manufacturer ID
@ -981,7 +986,8 @@ static int ov772x_video_probe(struct i2c_client *client)
default:
dev_err(&client->dev,
"Product ID error %x:%x\n", pid, ver);
return -ENODEV;
ret = -ENODEV;
goto done;
}
dev_info(&client->dev,
@ -991,7 +997,11 @@ static int ov772x_video_probe(struct i2c_client *client)
ver,
i2c_smbus_read_byte_data(client, MIDH),
i2c_smbus_read_byte_data(client, MIDL));
return v4l2_ctrl_handler_setup(&priv->hdl);
ret = v4l2_ctrl_handler_setup(&priv->hdl);
done:
ov772x_s_power(&priv->subdev, 0);
return ret;
}
static const struct v4l2_ctrl_ops ov772x_ctrl_ops = {

17
drivers/media/i2c/soc_camera/ov9640.c
View File

@ -592,7 +592,11 @@ static int ov9640_video_probe(struct i2c_client *client)
struct ov9640_priv *priv = to_ov9640_sensor(sd);
u8 pid, ver, midh, midl;
const char *devname;
int ret = 0;
int ret;
ret = ov9640_s_power(&priv->subdev, 1);
if (ret < 0)
return ret;
/*
* check and show product ID and manufacturer ID
@ -606,7 +610,7 @@ static int ov9640_video_probe(struct i2c_client *client)
if (!ret)
ret = ov9640_reg_read(client, OV9640_MIDL, &midl);
if (ret)
return ret;
goto done;
switch (VERSION(pid, ver)) {
case OV9640_V2:
@ -621,13 +625,18 @@ static int ov9640_video_probe(struct i2c_client *client)
break;
default:
dev_err(&client->dev, "Product ID error %x:%x\n", pid, ver);
return -ENODEV;
ret = -ENODEV;
goto done;
}
dev_info(&client->dev, "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
devname, pid, ver, midh, midl);
return v4l2_ctrl_handler_setup(&priv->hdl);
ret = v4l2_ctrl_handler_setup(&priv->hdl);
done:
ov9640_s_power(&priv->subdev, 0);
return ret;
}
static const struct v4l2_ctrl_ops ov9640_ctrl_ops = {

23
drivers/media/i2c/soc_camera/ov9740.c
View File

@ -853,34 +853,38 @@ static int ov9740_video_probe(struct i2c_client *client)
u8 modelhi, modello;
int ret;
ret = ov9740_s_power(&priv->subdev, 1);
if (ret < 0)
return ret;
/*
* check and show product ID and manufacturer ID
*/
ret = ov9740_reg_read(client, OV9740_MODEL_ID_HI, &modelhi);
if (ret < 0)
goto err;
goto done;
ret = ov9740_reg_read(client, OV9740_MODEL_ID_LO, &modello);
if (ret < 0)
goto err;
goto done;
priv->model = (modelhi << 8) | modello;
ret = ov9740_reg_read(client, OV9740_REVISION_NUMBER, &priv->revision);
if (ret < 0)
goto err;
goto done;
ret = ov9740_reg_read(client, OV9740_MANUFACTURER_ID, &priv->manid);
if (ret < 0)
goto err;
goto done;
ret = ov9740_reg_read(client, OV9740_SMIA_VERSION, &priv->smiaver);
if (ret < 0)
goto err;
goto done;
if (priv->model != 0x9740) {
ret = -ENODEV;
goto err;
goto done;
}
priv->ident = V4L2_IDENT_OV9740;
@ -889,7 +893,10 @@ static int ov9740_video_probe(struct i2c_client *client)
"Manufacturer 0x%02x, SMIA Version 0x%02x\n",
priv->model, priv->revision, priv->manid, priv->smiaver);
err:
ret = v4l2_ctrl_handler_setup(&priv->hdl);
done:
ov9740_s_power(&priv->subdev, 0);
return ret;
}
@ -973,8 +980,6 @@ static int ov9740_probe(struct i2c_client *client,
}
ret = ov9740_video_probe(client);
if (!ret)
ret = v4l2_ctrl_handler_setup(&priv->hdl);
if (ret < 0) {
v4l2_ctrl_handler_free(&priv->hdl);
kfree(priv);

18
drivers/media/i2c/soc_camera/rj54n1cb0c.c
View File

@ -1296,9 +1296,14 @@ static struct v4l2_subdev_ops rj54n1_subdev_ops = {
static int rj54n1_video_probe(struct i2c_client *client,
struct rj54n1_pdata *priv)
{
struct rj54n1 *rj54n1 = to_rj54n1(client);
int data1, data2;
int ret;
ret = rj54n1_s_power(&rj54n1->subdev, 1);
if (ret < 0)
return ret;
/* Read out the chip version register */
data1 = reg_read(client, RJ54N1_DEV_CODE);
data2 = reg_read(client, RJ54N1_DEV_CODE2);
@ -1307,18 +1312,21 @@ static int rj54n1_video_probe(struct i2c_client *client,
ret = -ENODEV;
dev_info(&client->dev, "No RJ54N1CB0C found, read 0x%x:0x%x\n",
data1, data2);
goto ei2c;
goto done;
}
/* Configure IOCTL polarity from the platform data: 0 or 1 << 7. */
ret = reg_write(client, RJ54N1_IOC, priv->ioctl_high << 7);
if (ret < 0)
goto ei2c;
goto done;
dev_info(&client->dev, "Detected a RJ54N1CB0C chip ID 0x%x:0x%x\n",
data1, data2);
ei2c:
ret = v4l2_ctrl_handler_setup(&rj54n1->hdl);
done:
rj54n1_s_power(&rj54n1->subdev, 0);
return ret;
}
@ -1382,9 +1390,9 @@ static int rj54n1_probe(struct i2c_client *client,
if (ret < 0) {
v4l2_ctrl_handler_free(&rj54n1->hdl);
kfree(rj54n1);
return ret;
}
return v4l2_ctrl_handler_setup(&rj54n1->hdl);
return ret;
}
static int rj54n1_remove(struct i2c_client *client)

12
drivers/media/i2c/soc_camera/tw9910.c
View File

@ -780,6 +780,7 @@ static int tw9910_video_probe(struct i2c_client *client)
{
struct tw9910_priv *priv = to_tw9910(client);
s32 id;
int ret;
/*
* tw9910 only use 8 or 16 bit bus width
@ -790,6 +791,10 @@ static int tw9910_video_probe(struct i2c_client *client)
return -ENODEV;
}
ret = tw9910_s_power(&priv->subdev, 1);
if (ret < 0)
return ret;
/*
* check and show Product ID
* So far only revisions 0 and 1 have been seen
@ -803,7 +808,8 @@ static int tw9910_video_probe(struct i2c_client *client)
dev_err(&client->dev,
"Product ID error %x:%x\n",
id, priv->revision);
return -ENODEV;
ret = -ENODEV;
goto done;
}
dev_info(&client->dev,
@ -811,7 +817,9 @@ static int tw9910_video_probe(struct i2c_client *client)
priv->norm = V4L2_STD_NTSC;
return 0;
done:
tw9910_s_power(&priv->subdev, 0);
return ret;
}
static struct v4l2_subdev_core_ops tw9910_subdev_core_ops = {

20
drivers/media/platform/soc_camera.c
View File

@ -1086,22 +1086,6 @@ static int soc_camera_probe(struct soc_camera_device *icd)
if (ret < 0)
goto eadd;
/*
* This will not yet call v4l2_subdev_core_ops::s_power(1), because the
* subdevice has not been initialised yet. We'll have to call it once
* again after initialisation, even though it shouldn't be needed, we
* don't do any IO here.
*
* The device pointer passed to soc_camera_power_on(), and ultimately to
* the platform callback, should be the subdev physical device. However,
* we have no way to retrieve a pointer to that device here. This isn't
* a real issue, as no platform currently uses the device pointer, and
* this soc_camera_power_on() call will be removed in the next commit.
*/
ret = soc_camera_power_on(icd->pdev, icl);
if (ret < 0)
goto epower;
/* Must have icd->vdev before registering the device */
ret = video_dev_create(icd);
if (ret < 0)
@ -1171,8 +1155,6 @@ static int soc_camera_probe(struct soc_camera_device *icd)
ici->ops->remove(icd);
__soc_camera_power_off(icd);
mutex_unlock(&icd->video_lock);
return 0;
@ -1193,8 +1175,6 @@ eadddev:
video_device_release(icd->vdev);
icd->vdev = NULL;
evdc:
__soc_camera_power_off(icd);
epower:
ici->ops->remove(icd);
eadd:
regulator_bulk_free(icl->num_regulators, icl->regulators);