Re: [PATCH] input: i8042: add quirk to implement i8042 detect for AMD

[Huang Rui <ray.huang@amd.com>]

On Fri, Oct 16, 2015 at 04:58:09PM +0800, Borislav Petkov wrote:
> On Fri, Oct 16, 2015 at 09:27:00AM -0400, Vincent Wan wrote:
> > Detecting platform supports i8042 or not, AMD resorted to
> > BIOS's FADT i8042 flag.
> > 
> > Signed-off-by: Vincent Wan <Vincent.Wan@amd.com>
> > ---
> >  drivers/input/serio/i8042-x86ia64io.h | 6 ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git a/drivers/input/serio/i8042-x86ia64io.h b/drivers/input/serio/i8042-x86ia64io.h
> > index c115565..bf3a605 100644
> > --- a/drivers/input/serio/i8042-x86ia64io.h
> > +++ b/drivers/input/serio/i8042-x86ia64io.h
> > @@ -9,6 +9,7 @@
> >  
> >  #ifdef CONFIG_X86
> >  #include <asm/x86_init.h>
> > +#include <linux/acpi.h>
> >  #endif
> >  
> >  /*
> > @@ -1047,6 +1048,11 @@ static int __init i8042_platform_init(void)
> >  	/* Just return if pre-detection shows no i8042 controller exist */
> >  	if (!x86_platform.i8042_detect())
> >  		return -ENODEV;
> > +
> > +	if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) {
> 
> Why the vendor check if you're accessing a bit defined in the ACPI spec?
> 

Yeah, I have the same concern with AMD vendor check. :)

Aaron, could you please help to check the impact at intel platfomrs if
we remove this check?

Thanks,
Rui