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Message-ID: <7c217595-e76e-4ba4-b052-9db360b84008@xs4all.nl>
Date: Fri, 15 Sep 2023 11:07:10 +0200
From: Hans Verkuil <hverkuil-cisco@...all.nl>
To: tumic@...see.org, Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
Martin Tůma <martin.tuma@...iteqautomotive.com>
Subject: Re: [RESEND PATCH v9 0/2] Digiteq Automotive MGB4 driver
On 15/09/2023 11:02, Hans Verkuil wrote:
> Hi Martin,
>
> On 12/09/2023 14:07, tumic@...see.org wrote:
>> From: Martin Tůma <martin.tuma@...iteqautomotive.com>
>>
>> Hi,
>> This patch adds a driver for the Digiteq Automotive MGB4 grabber card.
>> MGB4 is a modular frame grabber PCIe card for automotive video interfaces
>> (FPD-Link and GMSL for now). It is based on a Xilinx FPGA and uses their
>> XDMA IP core for DMA transfers. Additionally, Xilinx I2C and SPI IP cores
>> which already have drivers in linux are used in the design.
>>
>> The driver is a quite standard v4l2 driver, with one exception - there are
>> a lot of sysfs options that may/must be set before opening the v4l2 device
>> to adapt the card on a specific signal (see mgb4.rst for details)
>> as the card must be able to work with various signal sources (or displays)
>> that can not be auto-detected.
>
> First of all, there is no need to resend patches. Just check if they are in
> patchwork.linuxtv.org. It is fine to ping me, but resending just means the
> same patches end up twice in patchwork.
>
> Secondly, when running my build script I found a number of issues:
>
> sparse: WARNINGS:
>
> drivers/media/pci/mgb4/mgb4_core.c:572:78: warning: Using plain integer as NULL pointer
> drivers/media/pci/mgb4/mgb4_vin.c:605:41: warning: Using plain integer as NULL pointer
> drivers/media/pci/mgb4/mgb4_vout.c:336:41: warning: Using plain integer as NULL pointer
> drivers/media/pci/mgb4/mgb4_sysfs_out.c:67:43: warning: Using plain integer as NULL pointer
> drivers/media/pci/mgb4/mgb4_sysfs_out.c:67:60: warning: Using plain integer as NULL pointer
> drivers/media/pci/mgb4/mgb4_sysfs_out.c:83:9: warning: context imbalance in 'video_source_store' - different lock contexts for basic block
>
> smatch: WARNINGS:
>
> drivers/media/pci/mgb4/mgb4_cmt.c:187 freq_srch() error: uninitialized symbol 'm'.
>
> Those should be fixed.
Update: I have no other comments for this driver, so when I have a v10 with these issues
fixed, I'll accept it.
Regards,
Hans
>
> You can run the same tests yourself, see this announcement:
>
> https://lore.kernel.org/linux-media/18989016-6392-a77b-6cf7-1223c9161def@xs4all.nl/
>
> Regards,
>
> Hans
>
>>
>> Changes in v9:
>> * Renamed all sysfs show/store functions using the propper naming convention.
>> * Now using device_add_groups() when initializing the sysfs properties.
>> * Fixed build without debugfs support.
>> * Fixed documentation (vsync/hsync) + added default values where applicable.
>> * Fixed the rest of minor issues from v8 review.
>>
>> Changes in v8:
>> * Fixed broken video buffer size computation.
>> * Fixed switched I2C deserializers addresses.
>> * Do not depend on hwmon.
>>
>> Changes in v7:
>> * Now using hwmon for FPGA temperature reporting.
>> * Now using VIDIOC_S_FMT and v4l2_pix_format.bytesperline for setting
>> the alignment.
>> * Removed the magic sleep when loading the i2c/spi adapter modules (solved by
>> request_module() calls with propper - "platform:" prefixed - module
>> names).
>> * Now properly reporting all the timings info in the VIDIOC_G_DV_TIMINGS
>> ioctls.
>> * Updated the documentation.
>> * Minor fixes as discussed in the v6 review.
>> * Added debugfs access to the FPGA registers.
>>
>> Changes in v6:
>> * Rebased to current master that includes the Xilinx XDMA driver.
>>
>> Changes in v5:
>> * Removed unused <linux/version.h> includes
>>
>> Changes in v4:
>> * Redesigned the signal change handling logic. Now using the propper timings
>> API in the video input driver and a propper open() syscall check/logic in
>> the video output driver.
>> * Fixed all minor issues from v3 review.
>> * 'checkpatch.pl --strict' used for checking the code.
>>
>> Changes in v3:
>> * Rebased the DMA transfers part to use the new XDMA driver from Xilinx/AMD
>>
>> Changes in v2:
>> * Completely rewritten the original Xilinx's XDMA driver to meet kernel code
>> standards.
>> * Added all required "to" and "cc" mail addresses.
>>
>>
>> ===== v4l2-compliance results - input =====
>>
>> v4l2-compliance 1.24.1, 64 bits, 64-bit time_t
>>
>> Compliance test for mgb4 device /dev/video0:
>>
>> Driver Info:
>> Driver name : mgb4
>> Card type : MGB4 PCIe Card
>> Bus info : PCI:0000:01:00.0
>> Driver version : 6.4.0
>> Capabilities : 0x85200001
>> Video Capture
>> Read/Write
>> Streaming
>> Extended Pix Format
>> Device Capabilities
>> Device Caps : 0x05200001
>> Video Capture
>> Read/Write
>> Streaming
>> Extended Pix Format
>>
>> Required ioctls:
>> test VIDIOC_QUERYCAP: OK
>> test invalid ioctls: OK
>>
>> Allow for multiple opens:
>> test second /dev/video0 open: OK
>> test VIDIOC_QUERYCAP: OK
>> test VIDIOC_G/S_PRIORITY: OK
>> test for unlimited opens: OK
>>
>> Debug ioctls:
>> test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
>> 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
>> test VIDIOC_G/S_AUDIO: OK (Not Supported)
>> Inputs: 1 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
>> test VIDIOC_DV_TIMINGS_CAP: OK
>> test VIDIOC_G/S_EDID: OK (Not Supported)
>>
>> Control ioctls (Input 0):
>> test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK (Not Supported)
>> test VIDIOC_QUERYCTRL: OK (Not Supported)
>> test VIDIOC_G/S_CTRL: OK (Not Supported)
>> test VIDIOC_G/S/TRY_EXT_CTRLS: OK (Not Supported)
>> warn: v4l2-test-controls.cpp(1139): V4L2_CID_DV_RX_POWER_PRESENT not found for input 0
>> test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK (Not Supported)
>> test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
>> Standard Controls: 0 Private Controls: 0
>>
>> Format ioctls (Input 0):
>> test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
>> test VIDIOC_G/S_PARM: OK
>> test VIDIOC_G_FBUF: OK (Not Supported)
>> test VIDIOC_G_FMT: OK
>> test VIDIOC_TRY_FMT: OK
>> test VIDIOC_S_FMT: OK
>> 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 (Input 0):
>> 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 (Input 0):
>> test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
>> test VIDIOC_EXPBUF: OK
>> test Requests: OK (Not Supported)
>>
>> Total for mgb4 device /dev/video0: 45, Succeeded: 45, Failed: 0, Warnings: 1
>>
>> ===== v4l2-compliance results - output =====
>>
>> v4l2-compliance 1.24.1, 64 bits, 64-bit time_t
>>
>> Compliance test for mgb4 device /dev/video2:
>>
>> Driver Info:
>> Driver name : mgb4
>> Card type : MGB4 PCIe Card
>> Bus info : PCI:0000:01:00.0
>> Driver version : 6.4.0
>> Capabilities : 0x85200002
>> Video Output
>> Read/Write
>> Streaming
>> Extended Pix Format
>> Device Capabilities
>> Device Caps : 0x05200002
>> Video Output
>> Read/Write
>> Streaming
>> Extended Pix Format
>>
>> Required ioctls:
>> test VIDIOC_QUERYCAP: OK
>> test invalid ioctls: OK
>>
>> Allow for multiple opens:
>> test second /dev/video2 open: OK
>> test VIDIOC_QUERYCAP: OK
>> test VIDIOC_G/S_PRIORITY: OK
>> test for unlimited opens: OK
>>
>> Debug ioctls:
>> test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
>> 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
>> test VIDIOC_G/S_AUDOUT: OK (Not Supported)
>> Outputs: 1 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 (Output 0):
>> test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK (Not Supported)
>> test VIDIOC_QUERYCTRL: OK (Not Supported)
>> test VIDIOC_G/S_CTRL: OK (Not Supported)
>> test VIDIOC_G/S/TRY_EXT_CTRLS: OK (Not Supported)
>> test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK (Not Supported)
>> test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
>> Standard Controls: 0 Private Controls: 0
>>
>> Format ioctls (Output 0):
>> test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
>> test VIDIOC_G/S_PARM: OK (Not Supported)
>> test VIDIOC_G_FBUF: OK (Not Supported)
>> test VIDIOC_G_FMT: OK
>> test VIDIOC_TRY_FMT: OK
>> test VIDIOC_S_FMT: OK
>> 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 (Output 0):
>> 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 (Output 0):
>> test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
>> test VIDIOC_EXPBUF: OK
>> test Requests: OK (Not Supported)
>>
>> Total for mgb4 device /dev/video2: 45, Succeeded: 45, Failed: 0, Warnings: 0
>>
>> Martin Tůma (2):
>> Added Digiteq Automotive MGB4 driver
>> Added Digiteq Automotive MGB4 driver documentation
>>
>> Documentation/admin-guide/media/mgb4.rst | 374 +++++++
>> .../admin-guide/media/pci-cardlist.rst | 1 +
>> .../admin-guide/media/v4l-drivers.rst | 1 +
>> MAINTAINERS | 7 +
>> drivers/media/pci/Kconfig | 1 +
>> drivers/media/pci/Makefile | 1 +
>> drivers/media/pci/mgb4/Kconfig | 17 +
>> drivers/media/pci/mgb4/Makefile | 6 +
>> drivers/media/pci/mgb4/mgb4_cmt.c | 244 +++++
>> drivers/media/pci/mgb4/mgb4_cmt.h | 17 +
>> drivers/media/pci/mgb4/mgb4_core.c | 685 +++++++++++++
>> drivers/media/pci/mgb4/mgb4_core.h | 72 ++
>> drivers/media/pci/mgb4/mgb4_dma.c | 123 +++
>> drivers/media/pci/mgb4/mgb4_dma.h | 18 +
>> drivers/media/pci/mgb4/mgb4_i2c.c | 140 +++
>> drivers/media/pci/mgb4/mgb4_i2c.h | 35 +
>> drivers/media/pci/mgb4/mgb4_io.h | 33 +
>> drivers/media/pci/mgb4/mgb4_regs.c | 30 +
>> drivers/media/pci/mgb4/mgb4_regs.h | 35 +
>> drivers/media/pci/mgb4/mgb4_sysfs.h | 18 +
>> drivers/media/pci/mgb4/mgb4_sysfs_in.c | 753 ++++++++++++++
>> drivers/media/pci/mgb4/mgb4_sysfs_out.c | 693 +++++++++++++
>> drivers/media/pci/mgb4/mgb4_sysfs_pci.c | 71 ++
>> drivers/media/pci/mgb4/mgb4_trigger.c | 208 ++++
>> drivers/media/pci/mgb4/mgb4_trigger.h | 8 +
>> drivers/media/pci/mgb4/mgb4_vin.c | 932 ++++++++++++++++++
>> drivers/media/pci/mgb4/mgb4_vin.h | 69 ++
>> drivers/media/pci/mgb4/mgb4_vout.c | 594 +++++++++++
>> drivers/media/pci/mgb4/mgb4_vout.h | 65 ++
>> 29 files changed, 5251 insertions(+)
>> create mode 100644 Documentation/admin-guide/media/mgb4.rst
>> create mode 100644 drivers/media/pci/mgb4/Kconfig
>> create mode 100644 drivers/media/pci/mgb4/Makefile
>> create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.c
>> create mode 100644 drivers/media/pci/mgb4/mgb4_cmt.h
>> create mode 100644 drivers/media/pci/mgb4/mgb4_core.c
>> create mode 100644 drivers/media/pci/mgb4/mgb4_core.h
>> create mode 100644 drivers/media/pci/mgb4/mgb4_dma.c
>> create mode 100644 drivers/media/pci/mgb4/mgb4_dma.h
>> create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.c
>> create mode 100644 drivers/media/pci/mgb4/mgb4_i2c.h
>> create mode 100644 drivers/media/pci/mgb4/mgb4_io.h
>> create mode 100644 drivers/media/pci/mgb4/mgb4_regs.c
>> create mode 100644 drivers/media/pci/mgb4/mgb4_regs.h
>> create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs.h
>> create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_in.c
>> create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_out.c
>> create mode 100644 drivers/media/pci/mgb4/mgb4_sysfs_pci.c
>> create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.c
>> create mode 100644 drivers/media/pci/mgb4/mgb4_trigger.h
>> create mode 100644 drivers/media/pci/mgb4/mgb4_vin.c
>> create mode 100644 drivers/media/pci/mgb4/mgb4_vin.h
>> create mode 100644 drivers/media/pci/mgb4/mgb4_vout.c
>> create mode 100644 drivers/media/pci/mgb4/mgb4_vout.h
>>
>>
>> base-commit: 374a7f47bf401441edff0a64465e61326bf70a82
>
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