linux-kernel - Re: [PATCH v6 3/4] media: i2c: add MAX96717 driver

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Date: Tue, 23 Apr 2024 15:38:09 +0200
From: Julien Massot <julien.massot@...labora.com>
To: Sakari Ailus <sakari.ailus@....fi>
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org,
 kernel@...labora.com, linux-kernel@...r.kernel.org, mchehab@...nel.org,
 robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org
Subject: Re: [PATCH v6 3/4] media: i2c: add MAX96717 driver

Hi Sakari,

On 4/12/24 13:23, Sakari Ailus wrote:
> Hi Julien,
> 
> Thanks for the update.
> 
> Could you also cc me to the possible further updates, please?
> 
> On Mon, Mar 25, 2024 at 02:16:33PM +0100, Julien Massot wrote:
>> This driver handles the MAX96717 serializer in tunnel mode.
>> All incoming CSI traffic will be tunneled through the GMSL2
>> link.
>>
>> The MAX96717 driver can handle MAX96717 and MAX96717F variants
>> with the same "maxim,max96717f" compatible.
>>
>> Signed-off-by: Julien Massot <julien.massot@...labora.com>
>> ---
>> Change since v5:
>>   - set the driver compatible back to MAX96717F that can be used as a fallback for MAX96717
>>
>> Change since v4:
>>   - make the driver compatible with MAX96717 instead of MAX96717F
>>   - Add the device id for the MAX96717
>>   - remove hw_data structure for now, it can be usefull later for handling different serializers e.g max9295
>>
>> Change since v3:
>>   - Maintainers: align to the new binding path
>>   - Kconfig: better describe the symbol
>>   - store the v4l2_mbus_config_mipi_csi2 structure instead of the full endpoint in the driver private structure
>>   - use MAX96717_PAD_SINK/SOURCE instead of 0/1 for pad intialization
>>   - Removed incorrect call to fwnode_handle_put(priv->sd.fwnode)
>>   - Use unsigned int instead of u8
>>   - Allocate clk name out of the clk struct initialization
>>   - fixed multiline comment
>>   - Removed one unnecessary goto at the end of the probe function
>>
>> Change since v2:
>>   - Use CCI helpers instead of recoding register access
>>   - add missing bitfield header
>> ---
>>   MAINTAINERS                  |   7 +
>>   drivers/media/i2c/Kconfig    |  14 +
>>   drivers/media/i2c/Makefile   |   1 +
>>   drivers/media/i2c/max96717.c | 934 +++++++++++++++++++++++++++++++++++
>>   4 files changed, 956 insertions(+)
>>   create mode 100644 drivers/media/i2c/max96717.c
>>
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index b43102ca365d..c43088157f6d 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -13277,6 +13277,13 @@ S:	Maintained
>>   F:	Documentation/devicetree/bindings/media/i2c/maxim,max96712.yaml
>>   F:	drivers/staging/media/max96712/max96712.c
>>   
>> +MAX96717 GMSL2 SERIALIZER DRIVER
>> +M:	Julien Massot <julien.massot@...labora.com>
>> +L:	linux-media@...r.kernel.org
>> +S:	Maintained
>> +F:	Documentation/devicetree/bindings/media/i2c/maxim,max96717.yaml
>> +F:	drivers/media/i2c/max96717.c
>> +
>>   MAX9860 MONO AUDIO VOICE CODEC DRIVER
>>   M:	Peter Rosin <peda@...ntia.se>
>>   L:	alsa-devel@...a-project.org (moderated for non-subscribers)
>> diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
>> index 56f276b920ab..1a99396edbcf 100644
>> --- a/drivers/media/i2c/Kconfig
>> +++ b/drivers/media/i2c/Kconfig
>> @@ -1573,6 +1573,20 @@ config VIDEO_DS90UB960
>>   	  Device driver for the Texas Instruments DS90UB960
>>   	  FPD-Link III Deserializer and DS90UB9702 FPD-Link IV Deserializer.
>>   
>> +config VIDEO_MAX96717
>> +	tristate "Maxim MAX96717 GMSL2 Serializer support"
>> +	depends on OF && I2C && VIDEO_DEV && COMMON_CLK
>> +	select I2C_MUX
>> +	select GPIOLIB
>> +	select V4L2_CCI_I2C
> 
> I think you'll also need MEDIA_CONTROLLER, VIDEO_V4L2_SUBDEV_API and
> V4L2_FWNODE.

You are right, will be fixed in v7.

> 
>> +	help
>> +	  Device driver for the Maxim MAX96717 GMSL2 Serializer.
>> +	  MAX96717 serializers convert video on a MIPI CSI-2
>> +	  input to a GMSL2 output.
>> +
>> +	  To compile this driver as a module, choose M here: the
>> +	  module will be called max96717.
>> +
>>   endmenu
>>   
>>   endif # VIDEO_DEV
> 

-- 
Julien Massot
Senior Software Engineer
Collabora Ltd.
Platinum Building, St John's Innovation Park, Cambridge CB4 0DS, UK
Registered in England & Wales, no. 5513718