Re: Potential integration of thermal cameras into v4l

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Sophie Friedrich <lkml@flowerpot.me>
Cc: Jacopo Mondi <jacopo@jmondi.org>,
	Pekka Paalanen <ppaalanen@gmail.com>,
	linux-media@vger.kernel.org, libcamera-devel@lists.libcamera.org
Subject: Re: Potential integration of thermal cameras into v4l
Date: Tue, 10 Jan 2023 15:50:23 +0200	[thread overview]
Message-ID: <Y71tH5ZQT45MhHka@pendragon.ideasonboard.com> (raw)
In-Reply-To: <aa5ee8a1-e6cb-5573-8aa0-f583227cabcf@flowerpot.me>

Hi Sophie,

On Tue, Jan 10, 2023 at 02:33:17PM +0100, Sophie Friedrich wrote:
> Hello,
> 
> Yeah the link was broken before, but I already fixed it. I'm not
> sure if my reply actually reached the mailing list (it accidentally
> mixed up my sending adress). At least from the libcamera I got a
> bounce, as I'm not a member.

I've accepted both e-mails manually, and added the two addresses to the
approved senders.

> On 10/01/2023 14:13, Laurent Pinchart wrote:
> > Sophie, could you please share the `lsusb -v` output for the device (you
> > can limit it to a specific device with `-d VID:PID`), running as root
> > (e.g. with `sudo`) if possible ?
> 
> Note here that the idVendor and iManufacturer do not match. The
> camera uses the same USB VID:PID as the Netchip "Gadget Zero", because
> of course it does…

Of course... Thank you for the descriptors, even if they make me want to
cry...

> $ sudo lsusb -v -d 0525:a4a0
> Bus 001 Device 019: ID 0525:a4a0 Netchip Technology, Inc. Linux-USB 
> "Gadget Zero"
> Device Descriptor:
>    bLength                18
>    bDescriptorType         1
>    bcdUSB               2.01
>    bDeviceClass            0
>    bDeviceSubClass         0
>    bDeviceProtocol         0
>    bMaxPacketSize0        64
>    idVendor           0x0525 Netchip Technology, Inc.
>    idProduct          0xa4a0 Linux-USB "Gadget Zero"
>    bcdDevice            2.00
>    iManufacturer           1 Wuhan Guide Infrared Co., Ltd.
>    iProduct                2 MobIR Air
>    iSerial                 3 ZX01A19
>    bNumConfigurations      1
>    Configuration Descriptor:
>      bLength                 9
>      bDescriptorType         2
>      wTotalLength       0x0040
>      bNumInterfaces          2
>      bConfigurationValue     1
>      iConfiguration          4 MFI Configure
>      bmAttributes         0xc0
>        Self Powered
>      MaxPower              100mA
>      Interface Descriptor:
>        bLength                 9
>        bDescriptorType         4
>        bInterfaceNumber        0
>        bAlternateSetting       0
>        bNumEndpoints           2
>        bInterfaceClass       255 Vendor Specific Class
>        bInterfaceSubClass    240
>        bInterfaceProtocol      0
>        iInterface              5 iAP Interface
>        Endpoint Descriptor:
>          bLength                 7
>          bDescriptorType         5
>          bEndpointAddress     0x82  EP 2 IN
>          bmAttributes            2
>            Transfer Type            Bulk
>            Synch Type               None
>            Usage Type               Data
>          wMaxPacketSize     0x0040  1x 64 bytes
>          bInterval               0
>        Endpoint Descriptor:
>          bLength                 7
>          bDescriptorType         5
>          bEndpointAddress     0x02  EP 2 OUT
>          bmAttributes            2
>            Transfer Type            Bulk
>            Synch Type               None
>            Usage Type               Data
>          wMaxPacketSize     0x0040  1x 64 bytes
>          bInterval               0
>      Interface Descriptor:
>        bLength                 9
>        bDescriptorType         4
>        bInterfaceNumber        1
>        bAlternateSetting       0
>        bNumEndpoints           0
>        bInterfaceClass       255 Vendor Specific Class
>        bInterfaceSubClass    240
>        bInterfaceProtocol      1
>        iInterface              6 com.guidesensmart.mobir-air
>      Interface Descriptor:
>        bLength                 9
>        bDescriptorType         4
>        bInterfaceNumber        1
>        bAlternateSetting       1
>        bNumEndpoints           2
>        bInterfaceClass       255 Vendor Specific Class
>        bInterfaceSubClass    240
>        bInterfaceProtocol      1
>        iInterface              6 com.guidesensmart.mobir-air
>        Endpoint Descriptor:
>          bLength                 7
>          bDescriptorType         5
>          bEndpointAddress     0x81  EP 1 IN
>          bmAttributes            2
>            Transfer Type            Bulk
>            Synch Type               None
>            Usage Type               Data
>          wMaxPacketSize     0x0040  1x 64 bytes
>          bInterval               0
>        Endpoint Descriptor:
>          bLength                 7
>          bDescriptorType         5
>          bEndpointAddress     0x01  EP 1 OUT
>          bmAttributes            2
>            Transfer Type            Bulk
>            Synch Type               None
>            Usage Type               Data
>          wMaxPacketSize     0x0040  1x 64 bytes
>          bInterval               0
> Binary Object Store Descriptor:
>    bLength                 5
>    bDescriptorType        15
>    wTotalLength       0x000c
>    bNumDeviceCaps          1
>    USB 2.0 Extension Device Capability:
>      bLength                 7
>      bDescriptorType        16
>      bDevCapabilityType      2
>      bmAttributes   0x00000002
>        HIRD Link Power Management (LPM) Supported
> Device Status:     0x0001
>    Self Powered
> 

-- 
Regards,

Laurent Pinchart