FAILED: Patch "media: dw9714: Fix powerup sequence" failed to apply to 6.12-stable tree

FAILED: Patch "media: dw9714: Fix powerup sequence" failed to apply to 6.12-stable tree

[Sasha Levin]

The patch below does not apply to the 6.12-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

Thanks,
Sasha

------------------ original commit in Linus's tree ------------------

From 401aec35ac7bd04b4018a519257b945abb88e26c Mon Sep 17 00:00:00 2001
From: Ricardo Ribalda <ribalda@chromium.org>
Date: Wed, 10 Dec 2025 07:53:43 +0000
Subject: [PATCH] media: dw9714: Fix powerup sequence

We have experienced seen multiple I2C errors while doing stress test on
the module:

dw9714 i2c-PRP0001:01: dw9714_vcm_resume I2C failure: -5
dw9714 i2c-PRP0001:01: I2C write fail

Inspecting the powerup sequence we found that it does not match the
documentation at:
https://blog.arducam.com/downloads/DW9714A-DONGWOON(Autofocus_motor_manual).pdf

"""
(2) DW9714A requires waiting time of 12ms after power on. During this
waiting time, the offset calibration of internal amplifier is
operating for minimization of output offset current .
"""

This patch increases the powerup delay to follow the documentation.

Fixes: 9d00ccabfbb5 ("media: i2c: dw9714: Fix occasional probe errors")
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Reviewed-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Tested-by: Neil Sun <neil.sun@lcfuturecenter.com>
Reported-by: Naomi Huang <naomi.huang@lcfuturecenter.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
---
 drivers/media/i2c/dw9714.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/i2c/dw9714.c b/drivers/media/i2c/dw9714.c
index 1e7ad355a388c..3288de539452e 100644
--- a/drivers/media/i2c/dw9714.c
+++ b/drivers/media/i2c/dw9714.c
@@ -149,7 +149,7 @@ static int dw9714_power_up(struct dw9714_device *dw9714_dev)
 
 	gpiod_set_value_cansleep(dw9714_dev->powerdown_gpio, 0);
 
-	usleep_range(1000, 2000);
+	usleep_range(12000, 14000);
 
 	return 0;
 }
-- 
2.51.0

[PATCH 6.12.y] media: dw9714: Fix powerup sequence

[Ricardo Ribalda]

We have experienced seen multiple I2C errors while doing stress test on
the module:

dw9714 i2c-PRP0001:01: dw9714_vcm_resume I2C failure: -5
dw9714 i2c-PRP0001:01: I2C write fail

Inspecting the powerup sequence we found that it does not match the
documentation at:
https://blog.arducam.com/downloads/DW9714A-DONGWOON(Autofocus_motor_manual).pdf

"""
(2) DW9714A requires waiting time of 12ms after power on. During this
waiting time, the offset calibration of internal amplifier is
operating for minimization of output offset current .
"""

This patch increases the powerup delay to follow the documentation.

Fixes: 9d00ccabfbb5 ("media: i2c: dw9714: Fix occasional probe errors")
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Reviewed-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Tested-by: Neil Sun <neil.sun@lcfuturecenter.com>
Reported-by: Naomi Huang <naomi.huang@lcfuturecenter.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
(cherry picked from commit 401aec35ac7bd04b4018a519257b945abb88e26c)
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
 drivers/media/i2c/dw9714.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/i2c/dw9714.c b/drivers/media/i2c/dw9714.c
index 2ddd7daa79e2..9dde85a95662 100644
--- a/drivers/media/i2c/dw9714.c
+++ b/drivers/media/i2c/dw9714.c
@@ -157,7 +157,7 @@ static int dw9714_probe(struct i2c_client *client)
 		return rval;
 	}
 
-	usleep_range(1000, 2000);
+	usleep_range(12000, 14000);
 
 	v4l2_i2c_subdev_init(&dw9714_dev->sd, client, &dw9714_ops);
 	dw9714_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
@@ -262,7 +262,7 @@ static int  __maybe_unused dw9714_vcm_resume(struct device *dev)
 		dev_err(dev, "Failed to enable vcc: %d\n", ret);
 		return ret;
 	}
-	usleep_range(1000, 2000);
+	usleep_range(12000, 14000);
 
 	for (val = dw9714_dev->current_val % DW9714_CTRL_STEPS;
 	     val < dw9714_dev->current_val + DW9714_CTRL_STEPS - 1;
-- 
2.53.0.473.g4a7958ca14-goog