From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
To: Dave Stevenson <dave.stevenson@raspberrypi.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Pavel Machek <pavel@denx.de>,
Andrey Konovalov <andrey.konovalov@linaro.org>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Jacopo Mondi <jacopo@jmondi.org>,
Hans Verkuil <hverkuil-cisco@xs4all.nl>,
linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-renesas-soc@vger.kernel.org,
Prabhakar <prabhakar.csengg@gmail.com>,
Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>,
Biju Das <biju.das.jz@bp.renesas.com>
Subject: [PATCH v2 2/2] media: i2c: imx219: Balance runtime PM use-count
Date: Thu, 11 Mar 2021 09:52:05 +0000 [thread overview]
Message-ID: <20210311095205.8095-3-prabhakar.mahadev-lad.rj@bp.renesas.com> (raw)
In-Reply-To: <20210311095205.8095-1-prabhakar.mahadev-lad.rj@bp.renesas.com>
Move incrementing/decrementing runtime PM count to
imx219_start_streaming()/imx219_stop_streaming() functions respectively.
This fixes an issue of unbalanced runtime PM count in resume callback
error path where streaming is stopped and runtime PM count is left
unbalanced.
Fixes: 1283b3b8f82b9 ("media: i2c: Add driver for Sony IMX219 sensor")
Reported-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
drivers/media/i2c/imx219.c | 32 +++++++++++++++++---------------
1 file changed, 17 insertions(+), 15 deletions(-)
diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c
index 82756cbfbaac..49ba39418360 100644
--- a/drivers/media/i2c/imx219.c
+++ b/drivers/media/i2c/imx219.c
@@ -1035,37 +1035,47 @@ static int imx219_start_streaming(struct imx219 *imx219)
const struct imx219_reg_list *reg_list;
int ret;
+ ret = pm_runtime_get_sync(&client->dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(&client->dev);
+ return ret;
+ }
+
/* Apply default values of current mode */
reg_list = &imx219->mode->reg_list;
ret = imx219_write_regs(imx219, reg_list->regs, reg_list->num_of_regs);
if (ret) {
dev_err(&client->dev, "%s failed to set mode\n", __func__);
- return ret;
+ goto err_rpm_put;
}
ret = imx219_set_framefmt(imx219);
if (ret) {
dev_err(&client->dev, "%s failed to set frame format: %d\n",
__func__, ret);
- return ret;
+ goto err_rpm_put;
}
/* Apply customized values from user */
ret = __v4l2_ctrl_handler_setup(imx219->sd.ctrl_handler);
if (ret)
- return ret;
+ goto err_rpm_put;
/* set stream on register */
ret = imx219_write_reg(imx219, IMX219_REG_MODE_SELECT,
IMX219_REG_VALUE_08BIT, IMX219_MODE_STREAMING);
if (ret)
- return ret;
+ goto err_rpm_put;
/* vflip and hflip cannot change during streaming */
__v4l2_ctrl_grab(imx219->vflip, true);
__v4l2_ctrl_grab(imx219->hflip, true);
return 0;
+
+err_rpm_put:
+ pm_runtime_put(&client->dev);
+ return ret;
}
static void imx219_stop_streaming(struct imx219 *imx219)
@@ -1081,12 +1091,13 @@ static void imx219_stop_streaming(struct imx219 *imx219)
__v4l2_ctrl_grab(imx219->vflip, false);
__v4l2_ctrl_grab(imx219->hflip, false);
+
+ pm_runtime_put(&client->dev);
}
static int imx219_set_stream(struct v4l2_subdev *sd, int enable)
{
struct imx219 *imx219 = to_imx219(sd);
- struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret = 0;
mutex_lock(&imx219->mutex);
@@ -1096,22 +1107,15 @@ static int imx219_set_stream(struct v4l2_subdev *sd, int enable)
}
if (enable) {
- ret = pm_runtime_get_sync(&client->dev);
- if (ret < 0) {
- pm_runtime_put_noidle(&client->dev);
- goto err_unlock;
- }
-
/*
* Apply default & customized values
* and then start streaming.
*/
ret = imx219_start_streaming(imx219);
if (ret)
- goto err_rpm_put;
+ goto err_unlock;
} else {
imx219_stop_streaming(imx219);
- pm_runtime_put(&client->dev);
}
imx219->streaming = enable;
@@ -1120,8 +1124,6 @@ static int imx219_set_stream(struct v4l2_subdev *sd, int enable)
return ret;
-err_rpm_put:
- pm_runtime_put(&client->dev);
err_unlock:
mutex_unlock(&imx219->mutex);
--
2.17.1
next prev parent reply other threads:[~2021-03-11 9:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-11 9:52 [PATCH v2 0/2] media: i2c: imx219: Trivial Fixes Lad Prabhakar
2021-03-11 9:52 ` [PATCH v2 1/2] media: i2c: imx219: Move out locking/unlocking of vflip and hflip controls from imx219_set_stream Lad Prabhakar
2021-03-15 0:02 ` Laurent Pinchart
2021-03-11 9:52 ` Lad Prabhakar [this message]
2021-03-15 0:03 ` [PATCH v2 2/2] media: i2c: imx219: Balance runtime PM use-count Laurent Pinchart
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