Re: [PATCH 00/12] ACPI / pdx86: Add support for x86 Android tablets with broken DSDTs

[Hans de Goede <hdegoede@redhat.com>]

Hi All,

On 12/30/21 00:14, Hans de Goede wrote:
> Hi All,
> 
> As a small(ish) hoppy project over the holidays I've been looking into
> getting some (somewhat older) x86 tablets which ship with Android as the
> only OS on their factory image working with the mainline kernel.
> 
> These typically have pretty broken DSDTs since the Android image kernel
> just has everything hardcoded.
> 
> This patch-series makes most things on 3 of these tablets work with the
> mainline kernel and lays the groundwork for adding support for similar
> tablets.
> 
> Since the ACPI tables on these devices clearly are buggy this series is
> written so as to add minimal changes to the ACPI core code, leaving all
> of the heavy lifting to the recently introduced (in linux-next)
> drivers/platform/x86/x86-android-tablets.c module, which when built as
> a module only autoloads on affected devices based on DMI matching.
> 
> And when this module is disabled the added acpi_quirk_skip_*_enumeration()
> helpers are replaced by inline stubs and even the minimally added core
> code will be optimized away.
> 
> The ACPI core changes are in patches 1-3 of this series. Since the
> i2c and serdev ACPI enumeration changes are very small and depend on
> patch 1, I believe it would be best for patches 1-3 to all be merged
> through Rafael's ACPI tree.

I've added patches 4-12 to my pdx86/review-hans (soon to be for-next)
branch now.

Regards,

Hans


> Hans de Goede (12):
>   ACPI / x86: Add acpi_quirk_skip_[i2c_client|serdev]_enumeration()
>     helpers
>   i2c: acpi: Do not instantiate I2C-clients on boards with known bogus
>     DSDT entries
>   serdev: Do not instantiate serdevs on boards with known bogus DSDT
>     entries
>   platform/x86: x86-android-tablets: Don't return -EPROBE_DEFER from a
>     non probe() function
>   platform/x86: x86-android-tablets: Add support for PMIC interrupts
>   platform/x86: x86-android-tablets: Add support for instantiating
>     platform-devs
>   platform/x86: x86-android-tablets: Add support for instantiating
>     serdevs
>   platform/x86: x86-android-tablets: Add support for registering GPIO
>     lookup tables
>   platform/x86: x86-android-tablets: Add support for preloading modules
>   platform/x86: x86-android-tablets: Add Asus TF103C data
>   platform/x86: x86-android-tablets: Add Asus MeMO Pad 7 ME176C data
>   platform/x86: x86-android-tablets: Add TM800A550L data
> 
>  drivers/acpi/x86/utils.c                   |  96 ++++
>  drivers/i2c/i2c-core-acpi.c                |  17 +
>  drivers/platform/x86/Kconfig               |   2 +-
>  drivers/platform/x86/x86-android-tablets.c | 562 ++++++++++++++++++++-
>  drivers/tty/serdev/core.c                  |  14 +
>  include/acpi/acpi_bus.h                    |  16 +
>  6 files changed, 698 insertions(+), 9 deletions(-)
>