[PATCH AUTOSEL 4.9 041/114] media: ov6650: Move v4l2_clk_get() to ov6650_video_probe() helper

Sasha Levin
2019-05-22T19:31:29Z

From: Janusz Krzysztofik <jmkrzyszt@gmail.com>

[ Upstream commit ccdd85d518d8b9320ace1d87271f0ba2175f21fa ]

In preparation for adding asynchronous subdevice support to the driver,
don't acquire v4l2_clk from the driver .probe() callback as that may
fail if the clock is provided by a bridge driver which may be not yet
initialized. Move the v4l2_clk_get() to ov6650_video_probe() helper
which is going to be converted to v4l2_subdev_internal_ops.registered()
callback, executed only when the bridge driver is ready.

Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/i2c/soc_camera/ov6650.c | 25 ++++++++++++++-----------
1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/drivers/media/i2c/soc_camera/ov6650.c b/drivers/media/i2c/soc_camera/ov6650.c
index 8f85910eda5df..39f6d068dc0b7 100644
--- a/drivers/media/i2c/soc_camera/ov6650.c
+++ b/drivers/media/i2c/soc_camera/ov6650.c
@@ -840,9 +840,16 @@ static int ov6650_video_probe(struct i2c_client *client)
u8 pidh, pidl, midh, midl;
int ret;

+ priv->clk = v4l2_clk_get(&client->dev, NULL);
+ if (IS_ERR(priv->clk)) {
+ ret = PTR_ERR(priv->clk);
+ dev_err(&client->dev, "v4l2_clk request err: %d\n", ret);
+ return ret;
+ }
+
ret = ov6650_s_power(&priv->subdev, 1);
if (ret < 0)
- return ret;
+ goto eclkput;

/*
* check and show product ID and manufacturer ID
@@ -877,6 +884,11 @@ static int ov6650_video_probe(struct i2c_client *client)

done:
ov6650_s_power(&priv->subdev, 0);
+ if (!ret)
+ return 0;
+eclkput:
+ v4l2_clk_put(priv->clk);
+
return ret;
}

@@ -1033,18 +1045,9 @@ static int ov6650_probe(struct i2c_client *client,
priv->code = MEDIA_BUS_FMT_YUYV8_2X8;
priv->colorspace = V4L2_COLORSPACE_JPEG;

- priv->clk = v4l2_clk_get(&client->dev, NULL);
- if (IS_ERR(priv->clk)) {
- ret = PTR_ERR(priv->clk);
- goto eclkget;
- }
-
ret = ov6650_video_probe(client);
- if (ret) {
- v4l2_clk_put(priv->clk);
-eclkget:
+ if (ret)
v4l2_ctrl_handler_free(&priv->hdl);
- }

return ret;
}
--
2.20.1