[PATCH v2 0/9] Touch Bar support for T2 Macs

[Aditya Garg]

Looks like I messed up the email series, Resending.

Sorry for the trouble

> On 8 Aug 2024, at 5:23 PM, Aditya Garg <gargaditya08 at live.com> wrote:
> 
> Hi Maintainers
> 
> 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 patch series adds support for both the configurations.
> 
> The hid-appletb-bl driver adds support for the backlight of the Touch Bar.
> This enables the user to control the brightness of the Touch Bar from
> userspace. The Touch Bar supports 3 modes here: Max brightness, Dim and Off.
> So, daemons, used to manage Touch Bar can easily manage these modes by writing
> to /sys/class/backlight/appletb_backlight/brightness. It is needed by both the
> configurations of the Touch Bar.
> 
> The hid-appletb-kbd adds support for the first (predefined keys) configuration.
> There are 4 modes here: Esc key only, Fn mode, Media keys and No keys.
> Mode can be changed by writing to /sys/bus/hid/drivers/hid-appletb-kbd/<dev>/mode
> This configuration is what Windows uses with the official Apple Bootcamp drivers.
> 
> Rest patches support the second configuration, where the OS has full control
> on what's displayed on the Touch Bar. It is achieved by the patching the
> hid-multitouch driver to add support for touch feedback from the Touch Bar
> and the appletbdrm driver, that displays what we want to on the Touch Bar.
> This configuration is what macOS uses.
> 
> The appletbdrm driver is based on the similar driver made for Windows by
> imbushuo [1].
> 
> Currently, a daemon named tiny-dfr [2] is being used to display function keys
> and media controls using the second configuration for both Apple Silicon and
> T2 Macs.
> 
> A daemon for the first configuration is being developed, but that's a userspace
> thing.
> 
> [1]: https://github.com/imbushuo/DFRDisplayKm
> [2]: https://github.com/WhatAmISupposedToPutHere/tiny-dfr
> 
> v2:
>  1. Cleaned up some code in the hid-appletb-kbd driver.
>  2. Fixed wrong subject in drm/format-helper patch.
>  3. Fixed Co-developed-by wrongly added to hid-multitouch patch.
> 
> Kerem Karabay (9):
>  HID: hid-appletb-bl: add driver for the backlight of Apple Touch Bars
>  HID: hid-appletb-kbd: add driver for the keyboard mode of Apple Touch
>    Bars
>  HID: multitouch: support getting the contact ID from
>    HID_DG_TRANSDUCER_INDEX fields
>  HID: multitouch: support getting the tip state from HID_DG_TOUCH
>    fields
>  HID: multitouch: take cls->maxcontacts into account for devices
>    without a HID_DG_CONTACTMAX field too
>  HID: multitouch: allow specifying if a device is direct in a class
>  HID: multitouch: add device ID for Apple Touch Bars
>  drm/format-helper: Add conversion from XRGB8888 to BGR888
>  drm/tiny: add driver for Apple Touch Bars in x86 Macs
> 
> .../ABI/testing/sysfs-driver-hid-appletb-kbd  |  13 +
> MAINTAINERS                                   |  12 +
> drivers/gpu/drm/drm_format_helper.c           |  54 ++
> .../gpu/drm/tests/drm_format_helper_test.c    |  81 +++
> drivers/gpu/drm/tiny/Kconfig                  |  12 +
> drivers/gpu/drm/tiny/Makefile                 |   1 +
> drivers/gpu/drm/tiny/appletbdrm.c             | 624 ++++++++++++++++++
> drivers/hid/Kconfig                           |  22 +
> drivers/hid/Makefile                          |   2 +
> drivers/hid/hid-appletb-bl.c                  | 206 ++++++
> drivers/hid/hid-appletb-kbd.c                 | 303 +++++++++
> drivers/hid/hid-multitouch.c                  |  60 +-
> drivers/hid/hid-quirks.c                      |   8 +-
> include/drm/drm_format_helper.h               |   3 +
> 14 files changed, 1385 insertions(+), 16 deletions(-)
> create mode 100644 Documentation/ABI/testing/sysfs-driver-hid-appletb-kbd
> create mode 100644 drivers/gpu/drm/tiny/appletbdrm.c
> create mode 100644 drivers/hid/hid-appletb-bl.c
> create mode 100644 drivers/hid/hid-appletb-kbd.c
> 
> -- 
> 2.39.3 (Apple Git-146)
>