Re: [PATCH 0/4] x86: Trust firmware a bit more about presence of 8042

From: Marcos Paulo de Souza
Date: Fri Dec 09 2016 - 18:54:53 EST


Hi Dmitry,

On Fri, Dec 09, 2016 at 12:57:37PM -0800, Dmitry Torokhov wrote:
> Hi,
>
> Historically we did not trust PNP data regarding keyboard controllers on
> X86, but more and more boards get upset with us if they try to tell us that
> there is no keyboard controller and we still go and try to poke at where we
> think it might be. To work around this issue let's have a bit more faith in
> BIOS data, and if [lack] of PNP devices for mouse and keyboard matches whet
> firmware (basically ACPI FADT) tells us, let's abort i8042 probe.
>
> We add a new flag (enum) to x86_platform.legacy structure so we can
> distinguish between cases where platform/subarch never has 8042 (such as
> MID platform) and cases where firmware says that it is not there, so that
> i8042 driver can either abort immediately or go and check for presence of
> PNP devices. We also remove x86_platform.i8042_detect() as it is no longer
> used (platforms can set value of x86_platform.legacy.i8042 as needed in
> quirks).
>
> If you are OK with arch/x86 changes please apply together with the input
> part.

Looks very good, better than my initial idea of adding more code into i8042_detect.

Acked-by: Marcos Paulo de Souza <marcos.souza.org@xxxxxxxxx>

>
> Thanks,
> Dmitry
>
> Dmitry Torokhov (4):
> x86/init: add i8042 state to the platform data
> Input: i8042 - trust firmware a bit more when probing on X86
> x86/init: remove i8042_detect() form platform ops
> x86/init: fix a couple typos in arch/x86/include/asm/x86_init.h
>
> arch/x86/include/asm/x86_init.h | 26 +++++++++++++++++++++-----
> arch/x86/kernel/acpi/boot.c | 7 +++++++
> arch/x86/kernel/platform-quirks.c | 5 +++++
> arch/x86/kernel/x86_init.c | 2 --
> arch/x86/platform/ce4100/ce4100.c | 6 ------
> arch/x86/platform/intel-mid/intel-mid.c | 7 -------
> drivers/input/serio/i8042-x86ia64io.h | 10 +++++++---
> 7 files changed, 40 insertions(+), 23 deletions(-)
>
> --
> 2.8.0.rc3.226.g39d4020
>