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media: ov8856: Do not check for for module version 

commit 5a4e1b5aed upstream.

It the device is probed in non-zero ACPI D state, the module
identification is delayed until the first streamon.

The module identification has two parts: deviceID and version. To rea
the version we have to enable OTP read. This cannot be done during
streamon, becase it modifies REG_MODE_SELECT.

Since the driver has the same behaviour for all the module versions, do
not read the module version from the sensor's OTP.

Cc: stable@vger.kernel.org
Fixes: 0e014f1a8d ("media: ov8856: support device probe in non-zero ACPI D state")
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ricardo Ribalda 2023-03-23 23:44:20 +01:00 committed by Greg Kroah-Hartman
parent bccf9fe296
commit 3285613127
1 changed files with 0 additions and 40 deletions
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40
drivers/media/i2c/ov8856.c
View File

@ -1709,46 +1709,6 @@ static int ov8856_identify_module(struct ov8856 *ov8856)
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;