8 Commits

Author SHA1 Message Date
Tomi Valkeinen
ea90034e8f media: i2c: ds90ub913: Fix use of uninitialized variables
smatch reports some uninitialized variables:

drivers/media/i2c/ds90ub913.c:481 ub913_log_status() error: uninitialized symbol 'v1'.
drivers/media/i2c/ds90ub913.c:481 ub913_log_status() error: uninitialized symbol 'v2'.

These are used only for printing debug information, and the use of an
uninitialized variable only happens if an i2c transaction has failed,
which will print an error. Thus, fix the errors just by initializing the
variables to 0.

Closes: https://lore.kernel.org/all/8d6daeb1-b62a-bbb2-b840-8759c84f2085@xs4all.nl/

Fixes: c158d0d4ff15 ("media: i2c: add DS90UB913 driver")
Reported-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2023-08-14 20:27:58 +02:00
Tomi Valkeinen
be1e71b1db media: i2c: ds90ub913: Use v4l2_fwnode_endpoint_parse()
Use v4l2_fwnode_endpoint_parse() to parse the sink endpoint parameters.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2023-08-10 07:58:37 +02:00
Tomi Valkeinen
905f88cceb media: i2c: ds90ub9x3: Fix sub-device matching
Commit 1029939b3782 ("media: v4l: async: Simplify async sub-device fwnode
matching") recently changed how async sub-device matching works. This
breaks the UB9x3 drivers, as they set the subdev.fwnode to an endpoint.
Afaiu, the fix is simply to not set subdev.fwnode at all.

Fixes: 1029939b3782 ("media: v4l: async: Simplify async sub-device fwnode matching")
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2023-08-10 07:58:37 +02:00
Sakari Ailus
b8ec754ae4 media: v4l: async: Set v4l2_device and subdev in async notifier init
Set the v4l2_device already in async notifier init, so struct device
related to it will be available before the notifier is registered. This
requires separating notifier initialisation into two functions, one that
takes v4l2_device as its argument, v4l2_async_nf_init and
v4l2_async_subdev_nf_init, for sub-device notifiers. Registering the
notifier will use a single function, v4l2_async_nf_register.

This is done in order to make struct device available earlier, during
construction of the async connections, for sensible debug prints.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de> # imx6qp
Tested-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> # rcar + adv746x
Tested-by: Aishwarya Kothari <aishwarya.kothari@toradex.com> # Apalis i.MX6Q with TC358743
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> # Renesas RZ/G2L SMARC
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2023-08-10 07:58:32 +02:00
Sakari Ailus
adb2dcd5f2 media: v4l: async: Rename v4l2_async_subdev as v4l2_async_connection
Rename v4l2_async_subdev as v4l2_async_connection, in order to
differentiate between the sub-devices and their connections: one
sub-device can have many connections but the V4L2 async framework has so
far allowed just a single one. Connections in this context will later
translate into either MC ancillary or data links.

This patch prepares changing that relation by changing existing users of
v4l2_async_subdev to switch to v4l2_async_connection. Async sub-devices
themselves will not be needed anymore

Additionally, __v4l2_async_nf_add_subdev() has been renamed
__v4l2_async_nf_add_connection().

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de> # imx6qp
Tested-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> # rcar + adv746x
Tested-by: Aishwarya Kothari <aishwarya.kothari@toradex.com> # Apalis i.MX6Q with TC358743
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> # Renesas RZ/G2L SMARC
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2023-07-28 10:44:25 +02:00
Tomi Valkeinen
906a6c1c45 media: i2c: ds90ub913: Fix a warning about use of uninitialized variable
Fix the following warning:

drivers/media/i2c/ds90ub913.c:488:9: warning: 'v' may be used uninitialized [-Wmaybe-uninitialized]
  488 |         ub913_write(priv, UB913_REG_GENERAL_CFG,
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  489 |                     v | UB913_REG_GENERAL_CFG_CRC_ERR_RESET);
      |                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/i2c/ds90ub913.c:477:12: note: 'v' was declared here
  477 |         u8 v, v1, v2;
      |            ^

Fix the warning by initializing the variable to 0. Proper error handling
here would be somewhat pointless, as we are just printing register
values, and the user will see an error about the failed i2c transaction.

Fixes: c158d0d4ff15 ("media: i2c: add DS90UB913 driver")
Reported-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Closes: https://lore.kernel.org/all/a0180488-f7f5-8538-a8bb-52ae52912835@xs4all.nl/
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2023-07-25 09:24:30 +02:00
Uwe Kleine-König
f2183847cf media: ds90ub9xx: switch three more drivers back to use struct i2c_driver::probe()
struct i2c_driver::probe_new() is about to go away. Since I converted
all drivers below drivers/media use struct i2c_driver::probe, three more
drivers were added in the following commits that use .probe_new():

	commit 6363db1c9d45 ("media: i2c: add DS90UB953 driver")
	commit c158d0d4ff15 ("media: i2c: add DS90UB913 driver")
	commit afe267f2d368 ("media: i2c: add DS90UB960 driver")

Switch these driver to use the probe callback.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil: use proper commit description style]
2023-07-19 12:57:51 +02:00
Tomi Valkeinen
c158d0d4ff media: i2c: add DS90UB913 driver
Add driver for TI DS90UB913 FPD-Link III Serializer.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2023-07-14 13:19:31 +02:00