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Subject: media: ccs: Ensure control handlers have been set up after probe
Author: Sakari Ailus <sakari.ai...@linux.intel.com>
Date: Sat Oct 14 20:56:00 2023 +0300
If the sensor remains powered on after probe when it is needed again and
the runtime PM usage_count is incremented, the control handler setup for
neither control handler is run.
As this is, in most cases, a needless operation in probe, track the status
of sensor power handling after probe and set up control handlers even if
the device was already active right after probe.
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
drivers/media/i2c/ccs/ccs-core.c | 5 ++++-
drivers/media/i2c/ccs/ccs.h | 1 +
2 files changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/drivers/media/i2c/ccs/ccs-core.c b/drivers/media/i2c/ccs/ccs-core.c
index 12e6f0a26fc8..31769ff95d67 100644
--- a/drivers/media/i2c/ccs/ccs-core.c
+++ b/drivers/media/i2c/ccs/ccs-core.c
@@ -1878,9 +1878,11 @@ static int ccs_pm_get_init(struct ccs_sensor *sensor)
goto error;
/* Device was already active, so don't set controls */
- if (rval == 1)
+ if (rval == 1 && !sensor->handler_setup_needed)
return 0;
+ sensor->handler_setup_needed = false;
+
/* Restore V4L2 controls to the previously suspended device */
rval = v4l2_ctrl_handler_setup(&sensor->pixel_array->ctrl_handler);
if (rval)
@@ -3532,6 +3534,7 @@ static int ccs_probe(struct i2c_client *client)
sensor->streaming = false;
sensor->dev_init_done = true;
+ sensor->handler_setup_needed = true;
rval = ccs_write_msr_regs(sensor);
if (rval)
diff --git a/drivers/media/i2c/ccs/ccs.h b/drivers/media/i2c/ccs/ccs.h
index 9c3587b2fbe7..2c013d96adcc 100644
--- a/drivers/media/i2c/ccs/ccs.h
+++ b/drivers/media/i2c/ccs/ccs.h
@@ -236,6 +236,7 @@ struct ccs_sensor {
bool streaming;
bool dev_init_done;
+ bool handler_setup_needed;
u8 compressed_min_bpp;
struct ccs_module_info minfo;
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