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media: imx296: Add standby delay during probe

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BugLink: https://bugs.launchpad.net/bugs/2114239

commit 57d10bcac67707caaa542e09dee86e13ea85defc upstream.

Add a 2-5ms delay when coming out of standby and before reading the
sensor info register durning probe, as instructed by the datasheet. This
standby delay is already present when the sensor starts streaming.

During a cold-boot, reading the IMX296_SENSOR_INFO register would often
return a value of 0x0000, if this delay is not present before.

Fixes: cb33db2b6c ("media: i2c: IMX296 camera sensor driver")
Cc: stable@vger.kernel.org
Tested-by: Alexandru Ardelean <aardelean@baylibre.com>
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Noah Wager <noah.wager@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>
This commit is contained in:
Naushir Patuck
2024-11-15 20:07:17 +02:00
committed by Mehmet Basaran
parent c3c3cc7c79
commit af3607ea38
1 changed files with 2 additions and 0 deletions
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drivers/media/i2c/imx296.c
+2
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@@ -954,6 +954,8 @@ static int imx296_identify_model(struct imx296 *sensor)
return ret;
}
usleep_range(2000, 5000);
ret = imx296_read(sensor, IMX296_SENSOR_INFO);
if (ret < 0) {
dev_err(sensor->dev, "failed to read sensor information (%d)\n",