Re: Pluggable frame buffer devices

On 02/16/15 22:30, Mehmet Erol Sanliturk wrote:
> On Mon, Feb 16, 2015 at 9:10 AM, Hans Petter Selasky <hps_at_selasky.org>
> wrote:
>
>> On 02/16/15 16:39, Shawn Webb wrote:
>>
>>> On Sunday, February 15, 2015 11:14:47 PM Hans Petter Selasky wrote:
>>>
>>>> Hi,
>>>>
>>>> I've added support for USB display link adapters to FreeBSD-11-current,
>>>> but the kernel panics once "vt_fb_attach(info)" is called from
>>>> "fbd_register(struct fb_info* info)" when the USB device is plugged or
>>>> udl.ko is loaded. Is this a known issue?
>>>>
>>>> REF: https://svnweb.freebsd.org/base/head/sys/dev/usb/video/udl.c
>>>>
>>>> --HPS
>>>>
>>>
>>> I personally can't answer your question. But I'd love to help test this,
>>> especially since Haswell graphics isn't supported, yet, and my laptop is
>>> running Haswell. What would be a good USB display device to buy to help
>>> test
>>> this awesome work out?
>>>
>>
>> Hi Shawn,
>>
>> I think any USB device that uses the brand name "DisplayLink" will work.
>>
>> Current list of supported devices:
>>
>>   /*
>>>   * Matching devices.
>>>   */
>>> static const STRUCT_USB_HOST_ID udl_devs[] = {
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LCD4300U,
>>> DL120)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LCD8000U,
>>> DL120)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_GUC2020,
>>> DL160)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LD220,
>>> DL165)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_VCUD60,
>>> DL160)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_DLDVI,
>>> DL160)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_VGA10,
>>> DL120)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_WSDVI,
>>> DLUNK)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_EC008,
>>> DL160)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_HPDOCK,
>>> DL160)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_NL571,
>>> DL160)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_M01061,
>>> DL195)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_NBDOCK,
>>> DL165)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_SWDVI,
>>> DLUNK)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_UM7X0,
>>> DL120)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_CONV,
>>> DL160)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_PLUGABLE,
>>> DL160)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LUM70,
>>> DL125)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_POLARIS2,
>>> DLUNK)},
>>>          {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LT1421,
>>> DLUNK)}
>>> };
>>>
>>
>>
>> Also see:
>>
>> man udl
>>
>> Some work needs to be done to fully integrate with the VT console
>> subsystem. I had Xorg up and running today with the DisplayLink I adapter I
>> have, and I works quite well. With USB 3.0 ones I think we can expect more.
>>
>> --HPS
>> _______________________________________________
>>
>>
>
>
> Will there be support for the devices like the following USB video adapters
> ?
>
>
> http://www.amazon.com/gp/product/B00GUE5LGS/ref=s9_simh_gw_p147_d0_i11?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=desktop-2&pf_rd_r=1QXWR8TQVH25A4KZWMDM&pf_rd_t=36701&pf_rd_p=1970566542&pf_rd_i=desktop
>
>
> http://www.amazon.com/gp/product/B00A2E1MQA/ref=s9_simh_gw_p147_d0_i3?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=desktop-2&pf_rd_r=1QXWR8TQVH25A4KZWMDM&pf_rd_t=36701&pf_rd_p=1970566542&pf_rd_i=desktop
>
>
> http://www.amazon.com/gp/product/B00612ZPQA/ref=s9_simh_gw_p147_d0_i2?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=desktop-2&pf_rd_r=1QXWR8TQVH25A4KZWMDM&pf_rd_t=36701&pf_rd_p=1970566542&pf_rd_i=desktop
>

Depending on what USB protocol they are using we can add support for 
them. Maybe you need to buy one and dump the USB descriptors :-)

--HPS