linux-kernel - [PATCH v3 00/10] Improvements to IMX290 CMOS driver

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Date:   Sun, 24 May 2020 22:24:55 +0300
From:   Andrey Konovalov <andrey.konovalov@...aro.org>
To:     mchehab@...nel.org, sakari.ailus@....fi,
        manivannan.sadhasivam@...aro.org
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        c.barrett@...mos.com, a.brela@...mos.com, peter.griffin@...aro.org,
        Andrey Konovalov <andrey.konovalov@...aro.org>
Subject: [PATCH v3 00/10] Improvements to IMX290 CMOS driver

This patchset adds improvements to the existing media driver for IMX290
CMOS sensor from Sony. The major changes are adding 2 lane support,
configurable link frequency & pixel rate, test pattern generation, and
RAW12 mode support.

The link frequency & pixel rate combinations depend on various factors like
lane count, resolution and image format as per the datasheet.

Also fixes for the following issues in the existing driver are included:
* the current_format field in the struct imx290 can be used before
  initialization,
* the reset signal to IMX290 isn't handled correctly,
* the bus_type field of v4l2_fwnode_endpoint structure passed as the
  argument to v4l2_fwnode_endpoint_alloc_parse() function is not
  initiaized.

Changes in v3:

* The review comments from Sakari are addressed
  https://lkml.org/lkml/2019/12/19/705
  As a part of those changes:
  . null ptr checks are added to imx290_set_fmt() so that it can be called
    early in the probe() function to set the default format, and to
    initialize imx290->current_mode and imx290->bpp - these last two must be 
    set before imx290_calc_pixel_rate() is called when creating the controls
  . setting imx290->bpp removed from imx290_write_current_format(). Now this
    function only writes to the camera sensor registers. The call to
    imx290_write_current_format() is moved from imx290_set_fmt() back to
    imx290_start_streaming(): imx290_set_fmt() can be called when the sensor
    is powered off, and writes to the sensor registers would fail.
  . in imx290_set_ctrl() in the 12 bpp case the value the BLKLEVEL register
    is restored to when the test pattern is disabled is made consistent with
    imx290_12bit_settings[]
* The "IMX290 sensor driver fixes" patchset included
  https://patchwork.kernel.org/cover/11407347/
* Added a patch to set the bus_type field of v4l2_fwnode_endpoint structure
  before calling v4l2_fwnode_endpoint_alloc_parse()

Andrey Konovalov (4):
  media: i2c: imx290: set the format before VIDIOC_SUBDEV_G_FMT is
    called
  media: i2c: imx290: fix the order of the args in SET_RUNTIME_PM_OPS()
  media: i2c: imx290: fix reset GPIO pin handling
  media: i2c: imx290: set bus_type before calling
    v4l2_fwnode_endpoint_alloc_parse()

Manivannan Sadhasivam (6):
  media: i2c: imx290: Add support for 2 data lanes
  media: i2c: imx290: Add configurable link frequency and pixel rate
  media: i2c: imx290: Add support for test pattern generation
  media: i2c: imx290: Add RAW12 mode support
  media: i2c: imx290: Add support to enumerate all frame sizes
  media: i2c: imx290: Move the settle time delay out of loop

 drivers/media/i2c/imx290.c | 358 ++++++++++++++++++++++++++++++-------
 1 file changed, 297 insertions(+), 61 deletions(-)

-- 
2.17.1