FAILED: patch "[PATCH] media: i2c: og01a1b: power off sensor on remove" failed to apply to 6.18-stable tree

FAILED: patch "[PATCH] media: i2c: og01a1b: power off sensor on remove" failed to apply to 6.18-stable tree

[Sasha Levin]

The patch below does not apply to the 6.18-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>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.18.y
git checkout FETCH_HEAD
git cherry-pick -x a26c5ac46191ae34b3413f7a45d6241f63e15d42
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '20261107050650-failed-6.18-a26c5ac46191@kernel.org' --subject-prefix 'PATCH 6.18.y' 'HEAD^..'

Thanks,
Sasha

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

From a26c5ac46191ae34b3413f7a45d6241f63e15d42 Mon Sep 17 00:00:00 2001
From: Guangshuo Li <lgs201920130244@gmail.com>
Date: Tue, 15 Sep 2026 16:35:34 +0800
Subject: [PATCH] media: i2c: og01a1b: power off sensor on remove

og01a1b_probe() powers the sensor on explicitly before identifying and
initializing it. After a successful probe, runtime PM is enabled and
pm_runtime_idle() is used to allow the runtime suspend callback to
power the sensor off.

The probe error path explicitly calls og01a1b_power_off(), but the
normal remove path only disables runtime PM. pm_runtime_disable() does
not guarantee that an active device is runtime suspended, so the
sensor can remain powered when the driver is removed. This also leaves
the xvclk enable performed by og01a1b_power_on() unbalanced.

After disabling runtime PM, check whether the device is already
suspended. If it is still active, power the sensor off explicitly and
update the runtime PM state accordingly. Avoid powering it off again
when runtime suspend has already done so.

This issue was found by manual code inspection.

Fixes: a95ffde28783 ("media: i2c: og01a1b: Add support of xvclk supply clock in power management")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/media/i2c/og01a1b.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/i2c/og01a1b.c b/drivers/media/i2c/og01a1b.c
index 1675f0460969a..1cece90c59eeb 100644
--- a/drivers/media/i2c/og01a1b.c
+++ b/drivers/media/i2c/og01a1b.c
@@ -956,6 +956,11 @@ static void og01a1b_remove(struct i2c_client *client)
 	media_entity_cleanup(&sd->entity);
 	v4l2_ctrl_handler_free(sd->ctrl_handler);
 	pm_runtime_disable(og01a1b->dev);
+
+	if (!pm_runtime_status_suspended(og01a1b->dev)) {
+		og01a1b_power_off(og01a1b->dev);
+		pm_runtime_set_suspended(og01a1b->dev);
+	}
 }
 
 static int og01a1b_probe(struct i2c_client *client)
-- 
2.53.0

[PATCH 6.18.y 1/2] media: i2c: og01a1b: Switch from .s_stream to .enable_streams/.disable_streams

[Sasha Levin]

From: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>

[ Upstream commit 3a594bb454ba1ecb005f753007fa1bb5c5e68bae ]

The change allows to simplify the driver code, in particular the explicit
locking scheme for stream on/off or format update serialization can be
dropped in favour to the one provided by the V4L2 core internals.

Signed-off-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
[Sakari Ailus: Fix error handling for enable_streams callback.]
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Stable-dep-of: a26c5ac46191 ("media: i2c: og01a1b: power off sensor on remove")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/i2c/og01a1b.c | 90 ++++++++++++++-----------------------
 1 file changed, 34 insertions(+), 56 deletions(-)

diff --git a/drivers/media/i2c/og01a1b.c b/drivers/media/i2c/og01a1b.c
index 7b892b26203c0..4b6b9ac24594b 100644
--- a/drivers/media/i2c/og01a1b.c
+++ b/drivers/media/i2c/og01a1b.c
@@ -442,9 +442,6 @@ struct og01a1b {
 
 	/* Current mode */
 	const struct og01a1b_mode *cur_mode;
-
-	/* To serialize asynchronus callbacks */
-	struct mutex mutex;
 };
 
 static u64 to_pixel_rate(u32 f_index)
@@ -616,7 +613,6 @@ static int og01a1b_init_controls(struct og01a1b *og01a1b)
 	if (ret)
 		return ret;
 
-	ctrl_hdlr->lock = &og01a1b->mutex;
 	og01a1b->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr,
 						    &og01a1b_ctrl_ops,
 						    V4L2_CID_LINK_FREQ,
@@ -686,74 +682,66 @@ static void og01a1b_update_pad_format(const struct og01a1b_mode *mode,
 	fmt->field = V4L2_FIELD_NONE;
 }
 
-static int og01a1b_start_streaming(struct og01a1b *og01a1b)
+static int og01a1b_enable_streams(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_state *state, u32 pad,
+				  u64 streams_mask)
 {
+	struct og01a1b *og01a1b = to_og01a1b(sd);
+	unsigned int link_freq_index = og01a1b->cur_mode->link_freq_index;
 	const struct og01a1b_reg_list *reg_list;
-	int link_freq_index, ret;
+	int ret;
 
-	link_freq_index = og01a1b->cur_mode->link_freq_index;
-	reg_list = &link_freq_configs[link_freq_index].reg_list;
+	ret = pm_runtime_resume_and_get(og01a1b->dev);
+	if (ret)
+		return ret;
 
+	reg_list = &link_freq_configs[link_freq_index].reg_list;
 	ret = og01a1b_write_reg_list(og01a1b, reg_list);
 	if (ret) {
-		dev_err(og01a1b->dev, "failed to set plls");
-		return ret;
+		dev_err(og01a1b->dev, "failed to set plls: %d\n", ret);
+		goto error;
 	}
 
 	reg_list = &og01a1b->cur_mode->reg_list;
 	ret = og01a1b_write_reg_list(og01a1b, reg_list);
 	if (ret) {
-		dev_err(og01a1b->dev, "failed to set mode");
-		return ret;
+		dev_err(og01a1b->dev, "failed to set mode: %d\n", ret);
+		goto error;
 	}
 
 	ret = __v4l2_ctrl_handler_setup(og01a1b->sd.ctrl_handler);
 	if (ret)
-		return ret;
+		goto error;
 
 	ret = og01a1b_write_reg(og01a1b, OG01A1B_REG_MODE_SELECT,
 				OG01A1B_REG_VALUE_08BIT,
 				OG01A1B_MODE_STREAMING);
 	if (ret) {
-		dev_err(og01a1b->dev, "failed to set stream");
-		return ret;
+		dev_err(og01a1b->dev, "failed to start streaming: %d\n", ret);
+		goto error;
 	}
 
 	return 0;
-}
 
-static void og01a1b_stop_streaming(struct og01a1b *og01a1b)
-{
-	if (og01a1b_write_reg(og01a1b, OG01A1B_REG_MODE_SELECT,
-			      OG01A1B_REG_VALUE_08BIT, OG01A1B_MODE_STANDBY))
-		dev_err(og01a1b->dev, "failed to set stream");
+error:
+	pm_runtime_put_autosuspend(og01a1b->dev);
+
+	return ret;
 }
 
-static int og01a1b_set_stream(struct v4l2_subdev *sd, int enable)
+static int og01a1b_disable_streams(struct v4l2_subdev *sd,
+				   struct v4l2_subdev_state *state, u32 pad,
+				   u64 streams_mask)
 {
 	struct og01a1b *og01a1b = to_og01a1b(sd);
-	int ret = 0;
-
-	mutex_lock(&og01a1b->mutex);
-	if (enable) {
-		ret = pm_runtime_resume_and_get(og01a1b->dev);
-		if (ret) {
-			mutex_unlock(&og01a1b->mutex);
-			return ret;
-		}
+	int ret;
 
-		ret = og01a1b_start_streaming(og01a1b);
-		if (ret) {
-			enable = 0;
-			og01a1b_stop_streaming(og01a1b);
-			pm_runtime_put(og01a1b->dev);
-		}
-	} else {
-		og01a1b_stop_streaming(og01a1b);
-		pm_runtime_put(og01a1b->dev);
-	}
+	ret = og01a1b_write_reg(og01a1b, OG01A1B_REG_MODE_SELECT,
+				OG01A1B_REG_VALUE_08BIT, OG01A1B_MODE_STANDBY);
+	if (ret)
+		dev_err(og01a1b->dev, "failed to stop streaming: %d\n", ret);
 
-	mutex_unlock(&og01a1b->mutex);
+	pm_runtime_put_autosuspend(og01a1b->dev);
 
 	return ret;
 }
@@ -771,7 +759,6 @@ static int og01a1b_set_format(struct v4l2_subdev *sd,
 				      height, fmt->format.width,
 				      fmt->format.height);
 
-	mutex_lock(&og01a1b->mutex);
 	og01a1b_update_pad_format(mode, &fmt->format);
 	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 		*v4l2_subdev_state_get_format(sd_state, fmt->pad) = fmt->format;
@@ -794,8 +781,6 @@ static int og01a1b_set_format(struct v4l2_subdev *sd,
 					 h_blank);
 	}
 
-	mutex_unlock(&og01a1b->mutex);
-
 	return 0;
 }
 
@@ -805,15 +790,12 @@ static int og01a1b_get_format(struct v4l2_subdev *sd,
 {
 	struct og01a1b *og01a1b = to_og01a1b(sd);
 
-	mutex_lock(&og01a1b->mutex);
 	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
 		fmt->format = *v4l2_subdev_state_get_format(sd_state,
 							    fmt->pad);
 	else
 		og01a1b_update_pad_format(og01a1b->cur_mode, &fmt->format);
 
-	mutex_unlock(&og01a1b->mutex);
-
 	return 0;
 }
 
@@ -849,18 +831,14 @@ static int og01a1b_enum_frame_size(struct v4l2_subdev *sd,
 
 static int og01a1b_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 {
-	struct og01a1b *og01a1b = to_og01a1b(sd);
-
-	mutex_lock(&og01a1b->mutex);
 	og01a1b_update_pad_format(&supported_modes[0],
 				  v4l2_subdev_state_get_format(fh->state, 0));
-	mutex_unlock(&og01a1b->mutex);
 
 	return 0;
 }
 
 static const struct v4l2_subdev_video_ops og01a1b_video_ops = {
-	.s_stream = og01a1b_set_stream,
+	.s_stream = v4l2_subdev_s_stream_helper,
 };
 
 static const struct v4l2_subdev_pad_ops og01a1b_pad_ops = {
@@ -868,6 +846,8 @@ static const struct v4l2_subdev_pad_ops og01a1b_pad_ops = {
 	.get_fmt = og01a1b_get_format,
 	.enum_mbus_code = og01a1b_enum_mbus_code,
 	.enum_frame_size = og01a1b_enum_frame_size,
+	.enable_streams = og01a1b_enable_streams,
+	.disable_streams = og01a1b_disable_streams,
 };
 
 static const struct v4l2_subdev_ops og01a1b_subdev_ops = {
@@ -1046,7 +1026,6 @@ static void og01a1b_remove(struct i2c_client *client)
 	media_entity_cleanup(&sd->entity);
 	v4l2_ctrl_handler_free(sd->ctrl_handler);
 	pm_runtime_disable(og01a1b->dev);
-	mutex_destroy(&og01a1b->mutex);
 }
 
 static int og01a1b_probe(struct i2c_client *client)
@@ -1135,7 +1114,6 @@ static int og01a1b_probe(struct i2c_client *client)
 		goto power_off;
 	}
 
-	mutex_init(&og01a1b->mutex);
 	og01a1b->cur_mode = &supported_modes[0];
 	ret = og01a1b_init_controls(og01a1b);
 	if (ret) {
@@ -1143,6 +1121,7 @@ static int og01a1b_probe(struct i2c_client *client)
 		goto probe_error_v4l2_ctrl_handler_free;
 	}
 
+	og01a1b->sd.state_lock = og01a1b->ctrl_handler.lock;
 	og01a1b->sd.internal_ops = &og01a1b_internal_ops;
 	og01a1b->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 	og01a1b->sd.entity.ops = &og01a1b_subdev_entity_ops;
@@ -1183,7 +1162,6 @@ static int og01a1b_probe(struct i2c_client *client)
 
 probe_error_v4l2_ctrl_handler_free:
 	v4l2_ctrl_handler_free(og01a1b->sd.ctrl_handler);
-	mutex_destroy(&og01a1b->mutex);
 
 power_off:
 	og01a1b_power_off(og01a1b->dev);
-- 
2.53.0

[PATCH 6.18.y 2/2] media: i2c: og01a1b: power off sensor on remove

[Sasha Levin]

From: Guangshuo Li <lgs201920130244@gmail.com>

[ Upstream commit a26c5ac46191ae34b3413f7a45d6241f63e15d42 ]

og01a1b_probe() powers the sensor on explicitly before identifying and
initializing it. After a successful probe, runtime PM is enabled and
pm_runtime_idle() is used to allow the runtime suspend callback to
power the sensor off.

The probe error path explicitly calls og01a1b_power_off(), but the
normal remove path only disables runtime PM. pm_runtime_disable() does
not guarantee that an active device is runtime suspended, so the
sensor can remain powered when the driver is removed. This also leaves
the xvclk enable performed by og01a1b_power_on() unbalanced.

After disabling runtime PM, check whether the device is already
suspended. If it is still active, power the sensor off explicitly and
update the runtime PM state accordingly. Avoid powering it off again
when runtime suspend has already done so.

This issue was found by manual code inspection.

Fixes: a95ffde28783 ("media: i2c: og01a1b: Add support of xvclk supply clock in power management")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/i2c/og01a1b.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/i2c/og01a1b.c b/drivers/media/i2c/og01a1b.c
index 4b6b9ac24594b..68ebf44876781 100644
--- a/drivers/media/i2c/og01a1b.c
+++ b/drivers/media/i2c/og01a1b.c
@@ -1026,6 +1026,11 @@ static void og01a1b_remove(struct i2c_client *client)
 	media_entity_cleanup(&sd->entity);
 	v4l2_ctrl_handler_free(sd->ctrl_handler);
 	pm_runtime_disable(og01a1b->dev);
+
+	if (!pm_runtime_status_suspended(og01a1b->dev)) {
+		og01a1b_power_off(og01a1b->dev);
+		pm_runtime_set_suspended(og01a1b->dev);
+	}
 }
 
 static int og01a1b_probe(struct i2c_client *client)
-- 
2.53.0