In many use cases where the chip is part of a camera module, and the camera
module is wired together with a privacy LED, powering on the device during
probe will cause the LED blink, it is undesireable as the privacy LED concern.
Sakari's change -
https://lore.kernel.org/lkml/[email protected]/
which add the support device probe in non-zero ACPI D state.
This following patch add support probe in non-zero ACPI D state for more camera
sensors: ov2740, ov5670, ov5675, ov8856, imx208 and hi556.
--
This patch series is based on linux-next branch of Rafael J. Wysocki's
linux-pm git repository:
https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git
--
Bingbu Cao (5):
media: ov8856: support device probe in non-zero ACPI D state
media: ov2740: support device probe in non-zero ACPI D state
media: imx208: Support device probe in non-zero ACPI D state
media: ov5675: Support device probe in non-zero ACPI D state
media: hi556: Support device probe in non-zero ACPI D state
Sakari Ailus (1):
media: ov5670: Support device probe in non-zero ACPI D state
drivers/media/i2c/hi556.c | 70 +++++++++++++-------
drivers/media/i2c/imx208.c | 82 +++++++++++++++--------
drivers/media/i2c/ov2740.c | 69 ++++++++++++-------
drivers/media/i2c/ov5670.c | 78 +++++++++++++---------
drivers/media/i2c/ov5675.c | 71 +++++++++++++-------
drivers/media/i2c/ov8856.c | 162 +++++++++++++++++++++++++--------------------
6 files changed, 324 insertions(+), 208 deletions(-)
--
2.7.4
Tell ACPI device PM code that the driver supports the device being in
non-zero ACPI D state when the driver's probe function is entered.
Also do identification on the first access of the device, whether in probe
or when starting streaming.
Signed-off-by: Bingbu Cao <[email protected]>
---
drivers/media/i2c/ov8856.c | 162 +++++++++++++++++++++++++--------------------
1 file changed, 89 insertions(+), 73 deletions(-)
diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c
index c6c6050cda1a..8785764b7a74 100644
--- a/drivers/media/i2c/ov8856.c
+++ b/drivers/media/i2c/ov8856.c
@@ -1445,6 +1445,9 @@ struct ov8856 {
const struct ov8856_lane_cfg *priv_lane;
u8 modes_size;
+
+ /* True if the device has been identified */
+ bool identified;
};
struct ov8856_lane_cfg {
@@ -1685,6 +1688,71 @@ static int ov8856_write_reg_list(struct ov8856 *ov8856,
return 0;
}
+static int ov8856_identify_module(struct ov8856 *ov8856)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
+ int ret;
+ u32 val;
+
+ if (ov8856->identified)
+ return 0;
+
+ ret = ov8856_read_reg(ov8856, OV8856_REG_CHIP_ID,
+ OV8856_REG_VALUE_24BIT, &val);
+ if (ret)
+ return ret;
+
+ if (val != OV8856_CHIP_ID) {
+ dev_err(&client->dev, "chip id mismatch: %x!=%x",
+ OV8856_CHIP_ID, val);
+ return -ENXIO;
+ }
+
+ ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT,
+ OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING);
+ if (ret)
+ return ret;
+
+ ret = ov8856_write_reg(ov8856, OV8856_OTP_MODE_CTRL,
+ OV8856_REG_VALUE_08BIT, OV8856_OTP_MODE_AUTO);
+ if (ret) {
+ dev_err(&client->dev, "failed to set otp mode");
+ return ret;
+ }
+
+ ret = ov8856_write_reg(ov8856, OV8856_OTP_LOAD_CTRL,
+ OV8856_REG_VALUE_08BIT,
+ OV8856_OTP_LOAD_CTRL_ENABLE);
+ if (ret) {
+ dev_err(&client->dev, "failed to enable load control");
+ return ret;
+ }
+
+ ret = ov8856_read_reg(ov8856, OV8856_MODULE_REVISION,
+ OV8856_REG_VALUE_08BIT, &val);
+ if (ret) {
+ dev_err(&client->dev, "failed to read module revision");
+ return ret;
+ }
+
+ dev_info(&client->dev, "OV8856 revision %x (%s) at address 0x%02x\n",
+ val,
+ val == OV8856_2A_MODULE ? "2A" :
+ val == OV8856_1B_MODULE ? "1B" : "unknown revision",
+ client->addr);
+
+ ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT,
+ OV8856_REG_VALUE_08BIT, OV8856_MODE_STANDBY);
+ if (ret) {
+ dev_err(&client->dev, "failed to exit streaming mode");
+ return ret;
+ }
+
+ ov8856->identified = true;
+
+ return 0;
+}
+
static int ov8856_update_digital_gain(struct ov8856 *ov8856, u32 d_gain)
{
int ret;
@@ -1969,6 +2037,10 @@ static int ov8856_start_streaming(struct ov8856 *ov8856)
const struct ov8856_reg_list *reg_list;
int link_freq_index, ret;
+ ret = ov8856_identify_module(ov8856);
+ if (ret)
+ return ret;
+
link_freq_index = ov8856->cur_mode->link_freq_index;
reg_list = &ov8856->priv_lane->link_freq_configs[link_freq_index].reg_list;
@@ -2276,65 +2348,6 @@ static const struct v4l2_subdev_internal_ops ov8856_internal_ops = {
.open = ov8856_open,
};
-static int ov8856_identify_module(struct ov8856 *ov8856)
-{
- struct i2c_client *client = v4l2_get_subdevdata(&ov8856->sd);
- int ret;
- u32 val;
-
- ret = ov8856_read_reg(ov8856, OV8856_REG_CHIP_ID,
- OV8856_REG_VALUE_24BIT, &val);
- if (ret)
- return ret;
-
- if (val != OV8856_CHIP_ID) {
- dev_err(&client->dev, "chip id mismatch: %x!=%x",
- OV8856_CHIP_ID, val);
- return -ENXIO;
- }
-
- ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT,
- OV8856_REG_VALUE_08BIT, OV8856_MODE_STREAMING);
- if (ret)
- return ret;
-
- ret = ov8856_write_reg(ov8856, OV8856_OTP_MODE_CTRL,
- OV8856_REG_VALUE_08BIT, OV8856_OTP_MODE_AUTO);
- if (ret) {
- dev_err(&client->dev, "failed to set otp mode");
- return ret;
- }
-
- ret = ov8856_write_reg(ov8856, OV8856_OTP_LOAD_CTRL,
- OV8856_REG_VALUE_08BIT,
- OV8856_OTP_LOAD_CTRL_ENABLE);
- if (ret) {
- dev_err(&client->dev, "failed to enable load control");
- return ret;
- }
-
- ret = ov8856_read_reg(ov8856, OV8856_MODULE_REVISION,
- OV8856_REG_VALUE_08BIT, &val);
- if (ret) {
- dev_err(&client->dev, "failed to read module revision");
- return ret;
- }
-
- dev_info(&client->dev, "OV8856 revision %x (%s) at address 0x%02x\n",
- val,
- val == OV8856_2A_MODULE ? "2A" :
- val == OV8856_1B_MODULE ? "1B" : "unknown revision",
- client->addr);
-
- ret = ov8856_write_reg(ov8856, OV8856_REG_MODE_SELECT,
- OV8856_REG_VALUE_08BIT, OV8856_MODE_STANDBY);
- if (ret) {
- dev_err(&client->dev, "failed to exit streaming mode");
- return ret;
- }
-
- return 0;
-}
static int ov8856_get_hwcfg(struct ov8856 *ov8856, struct device *dev)
{
@@ -2458,6 +2471,7 @@ static int ov8856_probe(struct i2c_client *client)
{
struct ov8856 *ov8856;
int ret;
+ bool full_power;
ov8856 = devm_kzalloc(&client->dev, sizeof(*ov8856), GFP_KERNEL);
if (!ov8856)
@@ -2472,16 +2486,19 @@ static int ov8856_probe(struct i2c_client *client)
v4l2_i2c_subdev_init(&ov8856->sd, client, &ov8856_subdev_ops);
- ret = __ov8856_power_on(ov8856);
- if (ret) {
- dev_err(&client->dev, "failed to power on\n");
- return ret;
- }
+ full_power = acpi_dev_state_d0(&client->dev);
+ if (full_power) {
+ ret = __ov8856_power_on(ov8856);
+ if (ret) {
+ dev_err(&client->dev, "failed to power on\n");
+ return ret;
+ }
- ret = ov8856_identify_module(ov8856);
- if (ret) {
- dev_err(&client->dev, "failed to find sensor: %d", ret);
- goto probe_power_off;
+ ret = ov8856_identify_module(ov8856);
+ if (ret) {
+ dev_err(&client->dev, "failed to find sensor: %d", ret);
+ goto probe_power_off;
+ }
}
mutex_init(&ov8856->mutex);
@@ -2511,11 +2528,9 @@ static int ov8856_probe(struct i2c_client *client)
goto probe_error_media_entity_cleanup;
}
- /*
- * Device is already turned on by i2c-core with ACPI domain PM.
- * Enable runtime PM and turn off the device.
- */
- pm_runtime_set_active(&client->dev);
+ /* Set the device's state to active if it's in D0 state. */
+ if (full_power)
+ pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
pm_runtime_idle(&client->dev);
@@ -2562,6 +2577,7 @@ static struct i2c_driver ov8856_i2c_driver = {
},
.probe_new = ov8856_probe,
.remove = ov8856_remove,
+ .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
};
module_i2c_driver(ov8856_i2c_driver);
--
2.7.4
From: Sakari Ailus <[email protected]>
Tell ACPI device PM code that the driver supports the device being in
non-zero ACPI D state when the driver's probe function is entered.
Also do identification on the first access of the device, whether in probe
or when starting streaming.
Signed-off-by: Bingbu Cao <[email protected]>
Signed-off-by: Sakari Ailus <[email protected]>
---
drivers/media/i2c/ov5670.c | 78 +++++++++++++++++++++++++++-------------------
1 file changed, 46 insertions(+), 32 deletions(-)
diff --git a/drivers/media/i2c/ov5670.c b/drivers/media/i2c/ov5670.c
index 251f459ab484..5adf73cb88d4 100644
--- a/drivers/media/i2c/ov5670.c
+++ b/drivers/media/i2c/ov5670.c
@@ -1833,6 +1833,8 @@ struct ov5670 {
/* Streaming on/off */
bool streaming;
+ /* True if the device has been identified */
+ bool identified;
};
#define to_ov5670(_sd) container_of(_sd, struct ov5670, sd)
@@ -2273,6 +2275,32 @@ static int ov5670_get_skip_frames(struct v4l2_subdev *sd, u32 *frames)
return 0;
}
+/* Verify chip ID */
+static int ov5670_identify_module(struct ov5670 *ov5670)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov5670->sd);
+ int ret;
+ u32 val;
+
+ if (ov5670->identified)
+ return 0;
+
+ ret = ov5670_read_reg(ov5670, OV5670_REG_CHIP_ID,
+ OV5670_REG_VALUE_24BIT, &val);
+ if (ret)
+ return ret;
+
+ if (val != OV5670_CHIP_ID) {
+ dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
+ OV5670_CHIP_ID, val);
+ return -ENXIO;
+ }
+
+ ov5670->identified = true;
+
+ return 0;
+}
+
/* Prepare streaming by writing default values and customized values */
static int ov5670_start_streaming(struct ov5670 *ov5670)
{
@@ -2281,6 +2309,10 @@ static int ov5670_start_streaming(struct ov5670 *ov5670)
int link_freq_index;
int ret;
+ ret = ov5670_identify_module(ov5670);
+ if (ret)
+ return ret;
+
/* Get out of from software reset */
ret = ov5670_write_reg(ov5670, OV5670_REG_SOFTWARE_RST,
OV5670_REG_VALUE_08BIT, OV5670_SOFTWARE_RST);
@@ -2400,27 +2432,6 @@ static int __maybe_unused ov5670_resume(struct device *dev)
return 0;
}
-/* Verify chip ID */
-static int ov5670_identify_module(struct ov5670 *ov5670)
-{
- struct i2c_client *client = v4l2_get_subdevdata(&ov5670->sd);
- int ret;
- u32 val;
-
- ret = ov5670_read_reg(ov5670, OV5670_REG_CHIP_ID,
- OV5670_REG_VALUE_24BIT, &val);
- if (ret)
- return ret;
-
- if (val != OV5670_CHIP_ID) {
- dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
- OV5670_CHIP_ID, val);
- return -ENXIO;
- }
-
- return 0;
-}
-
static const struct v4l2_subdev_core_ops ov5670_core_ops = {
.log_status = v4l2_ctrl_subdev_log_status,
.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
@@ -2462,6 +2473,7 @@ static int ov5670_probe(struct i2c_client *client)
struct ov5670 *ov5670;
const char *err_msg;
u32 input_clk = 0;
+ bool full_power;
int ret;
device_property_read_u32(&client->dev, "clock-frequency", &input_clk);
@@ -2478,11 +2490,14 @@ static int ov5670_probe(struct i2c_client *client)
/* Initialize subdev */
v4l2_i2c_subdev_init(&ov5670->sd, client, &ov5670_subdev_ops);
- /* Check module identity */
- ret = ov5670_identify_module(ov5670);
- if (ret) {
- err_msg = "ov5670_identify_module() error";
- goto error_print;
+ full_power = acpi_dev_state_d0(&client->dev);
+ if (full_power) {
+ /* Check module identity */
+ ret = ov5670_identify_module(ov5670);
+ if (ret) {
+ err_msg = "ov5670_identify_module() error";
+ goto error_print;
+ }
}
mutex_init(&ov5670->mutex);
@@ -2519,11 +2534,9 @@ static int ov5670_probe(struct i2c_client *client)
ov5670->streaming = false;
- /*
- * Device is already turned on by i2c-core with ACPI domain PM.
- * Enable runtime PM and turn off the device.
- */
- pm_runtime_set_active(&client->dev);
+ /* Set the device's state to active if it's in D0 state. */
+ if (full_power)
+ pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
pm_runtime_idle(&client->dev);
@@ -2565,7 +2578,7 @@ static const struct dev_pm_ops ov5670_pm_ops = {
#ifdef CONFIG_ACPI
static const struct acpi_device_id ov5670_acpi_ids[] = {
- {"INT3479"},
+ { "INT3479" },
{ /* sentinel */ }
};
@@ -2580,6 +2593,7 @@ static struct i2c_driver ov5670_i2c_driver = {
},
.probe_new = ov5670_probe,
.remove = ov5670_remove,
+ .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
};
module_i2c_driver(ov5670_i2c_driver);
--
2.7.4
Tell ACPI device PM code that the driver supports the device being in
non-zero ACPI D state when the driver's probe function is entered.
Also do identification on the first access of the device, whether in probe
or when starting streaming.
Signed-off-by: Bingbu Cao <[email protected]>
---
drivers/media/i2c/ov2740.c | 69 ++++++++++++++++++++++++++++++----------------
1 file changed, 45 insertions(+), 24 deletions(-)
diff --git a/drivers/media/i2c/ov2740.c b/drivers/media/i2c/ov2740.c
index 934c9d65cb09..bab720c7c1de 100644
--- a/drivers/media/i2c/ov2740.c
+++ b/drivers/media/i2c/ov2740.c
@@ -345,6 +345,9 @@ struct ov2740 {
/* NVM data inforamtion */
struct nvm_data *nvm;
+
+ /* True if the device has been identified */
+ bool identified;
};
static inline struct ov2740 *to_ov2740(struct v4l2_subdev *subdev)
@@ -440,6 +443,30 @@ static int ov2740_write_reg_list(struct ov2740 *ov2740,
return 0;
}
+static int ov2740_identify_module(struct ov2740 *ov2740)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
+ int ret;
+ u32 val;
+
+ if (ov2740->identified)
+ return 0;
+
+ ret = ov2740_read_reg(ov2740, OV2740_REG_CHIP_ID, 3, &val);
+ if (ret)
+ return ret;
+
+ if (val != OV2740_CHIP_ID) {
+ dev_err(&client->dev, "chip id mismatch: %x!=%x",
+ OV2740_CHIP_ID, val);
+ return -ENXIO;
+ }
+
+ ov2740->identified = true;
+
+ return 0;
+}
+
static int ov2740_update_digital_gain(struct ov2740 *ov2740, u32 d_gain)
{
int ret = 0;
@@ -724,6 +751,10 @@ static int ov2740_start_streaming(struct ov2740 *ov2740)
int link_freq_index;
int ret = 0;
+ ret = ov2740_identify_module(ov2740);
+ if (ret)
+ return ret;
+
ov2740_load_otp_data(nvm);
link_freq_index = ov2740->cur_mode->link_freq_index;
@@ -956,25 +987,6 @@ static const struct v4l2_subdev_internal_ops ov2740_internal_ops = {
.open = ov2740_open,
};
-static int ov2740_identify_module(struct ov2740 *ov2740)
-{
- struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
- int ret;
- u32 val;
-
- ret = ov2740_read_reg(ov2740, OV2740_REG_CHIP_ID, 3, &val);
- if (ret)
- return ret;
-
- if (val != OV2740_CHIP_ID) {
- dev_err(&client->dev, "chip id mismatch: %x!=%x",
- OV2740_CHIP_ID, val);
- return -ENXIO;
- }
-
- return 0;
-}
-
static int ov2740_check_hwcfg(struct device *dev)
{
struct fwnode_handle *ep;
@@ -1137,6 +1149,7 @@ static int ov2740_probe(struct i2c_client *client)
{
struct ov2740 *ov2740;
int ret = 0;
+ bool full_power;
ret = ov2740_check_hwcfg(&client->dev);
if (ret) {
@@ -1149,6 +1162,15 @@ static int ov2740_probe(struct i2c_client *client)
if (!ov2740)
return -ENOMEM;
+ full_power = acpi_dev_state_d0(&client->dev);
+ if (full_power) {
+ ret = ov2740_identify_module(ov2740);
+ if (ret) {
+ dev_err(&client->dev, "failed to find sensor: %d", ret);
+ return ret;
+ }
+ }
+
v4l2_i2c_subdev_init(&ov2740->sd, client, &ov2740_subdev_ops);
ret = ov2740_identify_module(ov2740);
if (ret) {
@@ -1186,11 +1208,9 @@ static int ov2740_probe(struct i2c_client *client)
if (ret)
dev_warn(&client->dev, "register nvmem failed, ret %d\n", ret);
- /*
- * Device is already turned on by i2c-core with ACPI domain PM.
- * Enable runtime PM and turn off the device.
- */
- pm_runtime_set_active(&client->dev);
+ /* Set the device's state to active if it's in D0 state. */
+ if (full_power)
+ pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
pm_runtime_idle(&client->dev);
@@ -1225,6 +1245,7 @@ static struct i2c_driver ov2740_i2c_driver = {
},
.probe_new = ov2740_probe,
.remove = ov2740_remove,
+ .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
};
module_i2c_driver(ov2740_i2c_driver);
--
2.7.4
Tell ACPI device PM code that the driver supports the device being in
non-zero ACPI D state when the driver's probe function is entered.
Also do identification on the first access of the device, whether in probe
or when starting streaming.
Signed-off-by: Bingbu Cao <[email protected]>
---
drivers/media/i2c/imx208.c | 82 ++++++++++++++++++++++++++++++----------------
1 file changed, 53 insertions(+), 29 deletions(-)
diff --git a/drivers/media/i2c/imx208.c b/drivers/media/i2c/imx208.c
index 6f3d9c1b5879..b9516b2f1c15 100644
--- a/drivers/media/i2c/imx208.c
+++ b/drivers/media/i2c/imx208.c
@@ -296,6 +296,9 @@ struct imx208 {
/* OTP data */
bool otp_read;
char otp_data[IMX208_OTP_SIZE];
+
+ /* True if the device has been identified */
+ bool identified;
};
static inline struct imx208 *to_imx208(struct v4l2_subdev *_sd)
@@ -619,6 +622,34 @@ static int imx208_set_pad_format(struct v4l2_subdev *sd,
return 0;
}
+static int imx208_identify_module(struct imx208 *imx208)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
+ int ret;
+ u32 val;
+
+ if (imx208->identified)
+ return 0;
+
+ ret = imx208_read_reg(imx208, IMX208_REG_CHIP_ID,
+ 2, &val);
+ if (ret) {
+ dev_err(&client->dev, "failed to read chip id %x\n",
+ IMX208_CHIP_ID);
+ return ret;
+ }
+
+ if (val != IMX208_CHIP_ID) {
+ dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
+ IMX208_CHIP_ID, val);
+ return -EIO;
+ }
+
+ imx208->identified = true;
+
+ return 0;
+}
+
/* Start streaming */
static int imx208_start_streaming(struct imx208 *imx208)
{
@@ -626,6 +657,10 @@ static int imx208_start_streaming(struct imx208 *imx208)
const struct imx208_reg_list *reg_list;
int ret, link_freq_index;
+ ret = imx208_identify_module(imx208);
+ if (ret)
+ return ret;
+
/* Setup PLL */
link_freq_index = imx208->cur_mode->link_freq_index;
reg_list = &link_freq_configs[link_freq_index].reg_list;
@@ -752,29 +787,6 @@ static int __maybe_unused imx208_resume(struct device *dev)
}
/* Verify chip ID */
-static int imx208_identify_module(struct imx208 *imx208)
-{
- struct i2c_client *client = v4l2_get_subdevdata(&imx208->sd);
- int ret;
- u32 val;
-
- ret = imx208_read_reg(imx208, IMX208_REG_CHIP_ID,
- 2, &val);
- if (ret) {
- dev_err(&client->dev, "failed to read chip id %x\n",
- IMX208_CHIP_ID);
- return ret;
- }
-
- if (val != IMX208_CHIP_ID) {
- dev_err(&client->dev, "chip id mismatch: %x!=%x\n",
- IMX208_CHIP_ID, val);
- return -EIO;
- }
-
- return 0;
-}
-
static const struct v4l2_subdev_video_ops imx208_video_ops = {
.s_stream = imx208_set_stream,
};
@@ -813,6 +825,10 @@ static int imx208_read_otp(struct imx208 *imx208)
goto out_unlock;
}
+ ret = imx208_identify_module(imx208);
+ if (ret)
+ goto out_pm_put;
+
/* Write register address */
msgs[0].addr = client->addr;
msgs[0].flags = 0;
@@ -831,6 +847,7 @@ static int imx208_read_otp(struct imx208 *imx208)
ret = 0;
}
+out_pm_put:
pm_runtime_put(&client->dev);
out_unlock:
@@ -961,6 +978,7 @@ static int imx208_probe(struct i2c_client *client)
{
struct imx208 *imx208;
int ret;
+ bool full_power;
u32 val = 0;
device_property_read_u32(&client->dev, "clock-frequency", &val);
@@ -978,11 +996,14 @@ static int imx208_probe(struct i2c_client *client)
/* Initialize subdev */
v4l2_i2c_subdev_init(&imx208->sd, client, &imx208_subdev_ops);
- /* Check module identity */
- ret = imx208_identify_module(imx208);
- if (ret) {
- dev_err(&client->dev, "failed to find sensor: %d", ret);
- goto error_probe;
+ full_power = acpi_dev_state_d0(&client->dev);
+ if (full_power) {
+ /* Check module identity */
+ ret = imx208_identify_module(imx208);
+ if (ret) {
+ dev_err(&client->dev, "failed to find sensor: %d", ret);
+ goto error_probe;
+ }
}
/* Set default mode to max resolution */
@@ -1017,7 +1038,9 @@ static int imx208_probe(struct i2c_client *client)
goto error_async_subdev;
}
- pm_runtime_set_active(&client->dev);
+ /* Set the device's state to active if it's in D0 state. */
+ if (full_power)
+ pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
pm_runtime_idle(&client->dev);
@@ -1077,6 +1100,7 @@ static struct i2c_driver imx208_i2c_driver = {
},
.probe_new = imx208_probe,
.remove = imx208_remove,
+ .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
};
module_i2c_driver(imx208_i2c_driver);
--
2.7.4
Tell ACPI device PM code that the driver supports the device being in
non-zero ACPI D state when the driver's probe function is entered.
Also do identification on the first access of the device, whether in probe
or when starting streaming.
Signed-off-by: Bingbu Cao <[email protected]>
---
drivers/media/i2c/ov5675.c | 71 ++++++++++++++++++++++++++++++----------------
1 file changed, 46 insertions(+), 25 deletions(-)
diff --git a/drivers/media/i2c/ov5675.c b/drivers/media/i2c/ov5675.c
index da5850b7ad07..00925850fa7c 100644
--- a/drivers/media/i2c/ov5675.c
+++ b/drivers/media/i2c/ov5675.c
@@ -493,6 +493,9 @@ struct ov5675 {
/* Streaming on/off */
bool streaming;
+
+ /* True if the device has been identified */
+ bool identified;
};
static u64 to_pixel_rate(u32 f_index)
@@ -808,12 +811,41 @@ static void ov5675_update_pad_format(const struct ov5675_mode *mode,
fmt->field = V4L2_FIELD_NONE;
}
+static int ov5675_identify_module(struct ov5675 *ov5675)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
+ int ret;
+ u32 val;
+
+ if (ov5675->identified)
+ return 0;
+
+ ret = ov5675_read_reg(ov5675, OV5675_REG_CHIP_ID,
+ OV5675_REG_VALUE_24BIT, &val);
+ if (ret)
+ return ret;
+
+ if (val != OV5675_CHIP_ID) {
+ dev_err(&client->dev, "chip id mismatch: %x!=%x",
+ OV5675_CHIP_ID, val);
+ return -ENXIO;
+ }
+
+ ov5675->identified = true;
+
+ return 0;
+}
+
static int ov5675_start_streaming(struct ov5675 *ov5675)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
const struct ov5675_reg_list *reg_list;
int link_freq_index, ret;
+ ret = ov5675_identify_module(ov5675);
+ if (ret)
+ return ret;
+
link_freq_index = ov5675->cur_mode->link_freq_index;
reg_list = &link_freq_configs[link_freq_index].reg_list;
ret = ov5675_write_reg_list(ov5675, reg_list);
@@ -1048,26 +1080,6 @@ static const struct v4l2_subdev_internal_ops ov5675_internal_ops = {
.open = ov5675_open,
};
-static int ov5675_identify_module(struct ov5675 *ov5675)
-{
- struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
- int ret;
- u32 val;
-
- ret = ov5675_read_reg(ov5675, OV5675_REG_CHIP_ID,
- OV5675_REG_VALUE_24BIT, &val);
- if (ret)
- return ret;
-
- if (val != OV5675_CHIP_ID) {
- dev_err(&client->dev, "chip id mismatch: %x!=%x",
- OV5675_CHIP_ID, val);
- return -ENXIO;
- }
-
- return 0;
-}
-
static int ov5675_check_hwcfg(struct device *dev)
{
struct fwnode_handle *ep;
@@ -1154,6 +1166,7 @@ static int ov5675_remove(struct i2c_client *client)
static int ov5675_probe(struct i2c_client *client)
{
struct ov5675 *ov5675;
+ bool full_power;
int ret;
ret = ov5675_check_hwcfg(&client->dev);
@@ -1168,10 +1181,14 @@ static int ov5675_probe(struct i2c_client *client)
return -ENOMEM;
v4l2_i2c_subdev_init(&ov5675->sd, client, &ov5675_subdev_ops);
- ret = ov5675_identify_module(ov5675);
- if (ret) {
- dev_err(&client->dev, "failed to find sensor: %d", ret);
- return ret;
+
+ full_power = acpi_dev_state_d0(&client->dev);
+ if (full_power) {
+ ret = ov5675_identify_module(ov5675);
+ if (ret) {
+ dev_err(&client->dev, "failed to find sensor: %d", ret);
+ return ret;
+ }
}
mutex_init(&ov5675->mutex);
@@ -1204,7 +1221,10 @@ static int ov5675_probe(struct i2c_client *client)
* Device is already turned on by i2c-core with ACPI domain PM.
* Enable runtime PM and turn off the device.
*/
- pm_runtime_set_active(&client->dev);
+
+ /* Set the device's state to active if it's in D0 state. */
+ if (full_power)
+ pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
pm_runtime_idle(&client->dev);
@@ -1241,6 +1261,7 @@ static struct i2c_driver ov5675_i2c_driver = {
},
.probe_new = ov5675_probe,
.remove = ov5675_remove,
+ .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
};
module_i2c_driver(ov5675_i2c_driver);
--
2.7.4
Tell ACPI device PM code that the driver supports the device being in
non-zero ACPI D state when the driver's probe function is entered.
Also do identification on the first access of the device, whether in probe
or when starting streaming.
Signed-off-by: Bingbu Cao <[email protected]>
Signed-off-by: Kao, Arec <[email protected]>
---
drivers/media/i2c/hi556.c | 70 ++++++++++++++++++++++++++++++-----------------
1 file changed, 45 insertions(+), 25 deletions(-)
diff --git a/drivers/media/i2c/hi556.c b/drivers/media/i2c/hi556.c
index 8db1cbedc1fd..055d1aa8410e 100644
--- a/drivers/media/i2c/hi556.c
+++ b/drivers/media/i2c/hi556.c
@@ -495,6 +495,9 @@ struct hi556 {
/* Streaming on/off */
bool streaming;
+
+ /* True if the device has been identified */
+ bool identified;
};
static u64 to_pixel_rate(u32 f_index)
@@ -757,12 +760,41 @@ static void hi556_assign_pad_format(const struct hi556_mode *mode,
fmt->field = V4L2_FIELD_NONE;
}
+static int hi556_identify_module(struct hi556 *hi556)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
+ int ret;
+ u32 val;
+
+ if (hi556->identified)
+ return 0;
+
+ ret = hi556_read_reg(hi556, HI556_REG_CHIP_ID,
+ HI556_REG_VALUE_16BIT, &val);
+ if (ret)
+ return ret;
+
+ if (val != HI556_CHIP_ID) {
+ dev_err(&client->dev, "chip id mismatch: %x!=%x",
+ HI556_CHIP_ID, val);
+ return -ENXIO;
+ }
+
+ hi556->identified = true;
+
+ return 0;
+}
+
static int hi556_start_streaming(struct hi556 *hi556)
{
struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
const struct hi556_reg_list *reg_list;
int link_freq_index, ret;
+ ret = hi556_identify_module(hi556);
+ if (ret)
+ return ret;
+
link_freq_index = hi556->cur_mode->link_freq_index;
reg_list = &link_freq_configs[link_freq_index].reg_list;
ret = hi556_write_reg_list(hi556, reg_list);
@@ -1001,26 +1033,6 @@ static const struct v4l2_subdev_internal_ops hi556_internal_ops = {
.open = hi556_open,
};
-static int hi556_identify_module(struct hi556 *hi556)
-{
- struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
- int ret;
- u32 val;
-
- ret = hi556_read_reg(hi556, HI556_REG_CHIP_ID,
- HI556_REG_VALUE_16BIT, &val);
- if (ret)
- return ret;
-
- if (val != HI556_CHIP_ID) {
- dev_err(&client->dev, "chip id mismatch: %x!=%x",
- HI556_CHIP_ID, val);
- return -ENXIO;
- }
-
- return 0;
-}
-
static int hi556_check_hwcfg(struct device *dev)
{
struct fwnode_handle *ep;
@@ -1106,6 +1118,7 @@ static int hi556_remove(struct i2c_client *client)
static int hi556_probe(struct i2c_client *client)
{
struct hi556 *hi556;
+ bool full_power;
int ret;
ret = hi556_check_hwcfg(&client->dev);
@@ -1120,10 +1133,14 @@ static int hi556_probe(struct i2c_client *client)
return -ENOMEM;
v4l2_i2c_subdev_init(&hi556->sd, client, &hi556_subdev_ops);
- ret = hi556_identify_module(hi556);
- if (ret) {
- dev_err(&client->dev, "failed to find sensor: %d", ret);
- return ret;
+
+ full_power = acpi_dev_state_d0(&client->dev);
+ if (full_power) {
+ ret = hi556_identify_module(hi556);
+ if (ret) {
+ dev_err(&client->dev, "failed to find sensor: %d", ret);
+ return ret;
+ }
}
mutex_init(&hi556->mutex);
@@ -1152,7 +1169,9 @@ static int hi556_probe(struct i2c_client *client)
goto probe_error_media_entity_cleanup;
}
- pm_runtime_set_active(&client->dev);
+ /* Set the device's state to active if it's in D0 state. */
+ if (full_power)
+ pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
pm_runtime_idle(&client->dev);
@@ -1189,6 +1208,7 @@ static struct i2c_driver hi556_i2c_driver = {
},
.probe_new = hi556_probe,
.remove = hi556_remove,
+ .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
};
module_i2c_driver(hi556_i2c_driver);
--
2.7.4