[PATCH v7 2/2] drm/tiny: add driver for Apple Touch Bars in x86 Macs

[Aditya Garg]

> On 3 Mar 2025, at 9:15 PM, Thomas Zimmermann <tzimmermann at suse.de> wrote:
> 
> Hi
> 
>> Am 27.02.25 um 10:42 schrieb Aditya Garg:
>>>> On 27 Feb 2025, at 3:04 PM, Thomas Zimmermann <tzimmermann at suse.de> wrote:
>>> Hi
>>>> Am 26.02.25 um 17:04 schrieb Aditya Garg:
>>>> From: Kerem Karabay <kekrby at gmail.com>
>>>> The Touch Bars found on x86 Macs support two USB configurations: one
>>>> where the device presents itself as a HID keyboard and can display
>>>> predefined sets of keys, and one where the operating system has full
>>>> control over what is displayed.
>>>> This commit adds support for the display functionality of the second
>>>> configuration. Functionality for the first configuration has been
>>>> merged in the HID tree.
>>>> Note that this driver has only been tested on T2 Macs, and only includes
>>>> the USB device ID for these devices. Testing on T1 Macs would be
>>>> appreciated.
>>>> Credit goes to Ben (Bingxing) Wang on GitHub for reverse engineering
>>>> most of the protocol.
>>>> Also, as requested by Andy, I would like to clarify the use of __packed
>>>> structs in this driver:
>>>> - All the packed structs are aligned except for appletbdrm_msg_information.
>>>> - We have to pack appletbdrm_msg_information since it is requirement of
>>>>  the protocol.
>>>> - We compared binaries compiled by keeping the rest structs __packed and
>>>>  not __packed using bloat-o-meter, and __packed was not affecting code
>>>>  generation.
>>>> - To maintain consistency, rest structs have been kept __packed.
>>>> I would also like to point out that since the driver was reverse-engineered
>>>> the actual data types of the protocol might be different, including, but
>>>> not limited to, endianness.
>>>> Link: https://github.com/imbushuo/DFRDisplayKm
>>>> Signed-off-by: Kerem Karabay <kekrby at gmail.com>
>>>> Co-developed-by: Atharva Tiwari <evepolonium at gmail.com>
>>>> Signed-off-by: Atharva Tiwari <evepolonium at gmail.com>
>>>> Co-developed-by: Aditya Garg <gargaditya08 at live.com>
>>>> Signed-off-by: Aditya Garg <gargaditya08 at live.com>
>>>> Signed-off-by: Aun-Ali Zaidi <admin at kodeit.net>
>>> Reviewed-by: Thomas Zimmermann <tzimmermann at suse.de>
>>> Thanks for the effort. As far as I'm concerned, this driver looks good. If no further comments come in, I can add it to the DRM tree in a few days.
>> Thanks a lot Thomas, as well as Andy for reviewing the driver and making it better!
> 
> I've merged the driver into the DRM misc tree and it should be available in v6.15.

Thanks Thomas!