linux-kernel - Re: [PATCH v2 0/2] media: add Himax HM1246 image sensor

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Message-ID: <8417d761-114b-4e41-8a4a-9eac2600637f@emfend.at>
Date: Wed, 3 Sep 2025 17:16:36 +0200
From: Matthias Fend <matthias.fend@...end.at>
To: Mauro Carvalho Chehab <mchehab@...nel.org>, Rob Herring
 <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, bsp-development.geo@...ca-geosystems.com,
 Sakari Ailus <sakari.ailus@...ux.intel.com>,
 Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH v2 0/2] media: add Himax HM1246 image sensor

Hi all,

since I sent the first version of this patch series quite some time ago 
and, apart from the bindings there has been no feedback, I wanted to 
check whether there might be any fundamental concerns (such as the 
sensor being somewhat older)?

If there are no general objections to this driver, I would be very 
grateful for any comments or suggestions for improvement.

Thanks
  ~Matthias

Added Sakari and Laurent to CC.

Am 26.05.2025 um 08:59 schrieb Matthias Fend:
> Hello,
> 
> this series adds support for the Himax HM1246 image sensor.
> The Himax HM1246-AWD is a 1/3.7-Inch CMOS image sensor SoC with an active
> array size of 1296 x 976. The datasheet can b
> Currently, only the native RAW mode is supported. Other modes and the
> internal image signal processing pipeline are not currently supported.
> The data sheet is available on the manufacturer's website [1].
> Tested on i.MX8MP hardware. A Toshiba TC358746 bridge was used to convert
> the sensor's parallel video output into MIPI signals for the i.MX8MP.
> 
> Best regards
>   ~Matthias
>   
> [1] https://www.himax.com.tw/wp-content/uploads/2024/03/HM1246-AWD_DS_v01.pdf
> 
> v4l2-compliance 1.28.1, 64 bits, 64-bit time_t
> 
> Compliance test for device /dev/v4l-subdev4:
> 
> Driver Info:
>          Driver version   : 6.12.0
>          Capabilities     : 0x00000000
>          Client Capabilities: 0x0000000000000003
> streams interval-uses-which
> Required ioctls:
>          test VIDIOC_SUDBEV_QUERYCAP: OK
>          test invalid ioctls: OK
> 
> Allow for multiple opens:
>          test second /dev/v4l-subdev4 open: OK
>          test VIDIOC_SUBDEV_QUERYCAP: OK
>          test for unlimited opens: OK
> 
> Debug ioctls:
>          test VIDIOC_LOG_STATUS: OK (Not Supported)
> 
> Input ioctls:
>          test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
>          test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
>          test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
>          test VIDIOC_ENUMAUDIO: OK (Not Supported)
>          test VIDIOC_G/S/ENUMINPUT: OK (Not Supported)
>          test VIDIOC_G/S_AUDIO: OK (Not Supported)
>          Inputs: 0 Audio Inputs: 0 Tuners: 0
> 
> Output ioctls:
>          test VIDIOC_G/S_MODULATOR: OK (Not Supported)
>          test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
>          test VIDIOC_ENUMAUDOUT: OK (Not Supported)
>          test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
>          test VIDIOC_G/S_AUDOUT: OK (Not Supported)
>          Outputs: 0 Audio Outputs: 0 Modulators: 0
> 
> Input/Output configuration ioctls:
>          test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
>          test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
>          test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
>          test VIDIOC_G/S_EDID: OK (Not Supported)
> 
> Control ioctls:
>          test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK
>          test VIDIOC_QUERYCTRL: OK
>          test VIDIOC_G/S_CTRL: OK
>          test VIDIOC_G/S/TRY_EXT_CTRLS: OK
>          test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
>          test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
>          Standard Controls: 15 Private Controls: 0
> 
> Format ioctls:
>          test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK (Not Supported)
>          test VIDIOC_G/S_PARM: OK (Not Supported)
>          test VIDIOC_G_FBUF: OK (Not Supported)
>          test VIDIOC_G_FMT: OK (Not Supported)
>          test VIDIOC_TRY_FMT: OK (Not Supported)
>          test VIDIOC_S_FMT: OK (Not Supported)
>          test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
>          test Cropping: OK (Not Supported)
>          test Composing: OK (Not Supported)
>          test Scaling: OK (Not Supported)
> 
> Codec ioctls:
>          test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
>          test VIDIOC_G_ENC_INDEX: OK (Not Supported)
>          test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)
> 
> Buffer ioctls:
>          test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK (Not Supported)
>          test CREATE_BUFS maximum buffers: OK
>          test VIDIOC_REMOVE_BUFS: OK
>          test VIDIOC_EXPBUF: OK (Not Supported)
>          test Requests: OK (Not Supported)
> 
> Total for device /dev/v4l-subdev4: 45, Succeeded: 45, Failed: 0, Warnings: 0
> 
> Signed-off-by: Matthias Fend <matthias.fend@...end.at>
> ---
> Changes in v2:
> - Use macros for 64-bit division
> - Avoid compiler warnings about potentially uninitialized variables
> - Fix two uses of dev_err_probe
> - Link to v1: https://lore.kernel.org/r/20250403-hm1246-v1-0-30990d71bc42@emfend.at
> 
> ---
> Matthias Fend (2):
>        media: dt-bindings: i2c: add Himax HM1246 image sensor
>        media: i2c: add Himax HM1246 image sensor driver
> 
>   .../bindings/media/i2c/himax,hm1246.yaml           |  111 ++
>   MAINTAINERS                                        |    8 +
>   drivers/media/i2c/Kconfig                          |    9 +
>   drivers/media/i2c/Makefile                         |    1 +
>   drivers/media/i2c/hm1246.c                         | 1421 ++++++++++++++++++++
>   5 files changed, 1550 insertions(+)
> ---
> base-commit: 0ff41df1cb268fc69e703a08a57ee14ae967d0ca
> change-id: 20250403-hm1246-96b0cdab773c
> 
> Best regards,