linux-kernel - Re: [PATCH] ACPI: Parse entire table as a term_list for Dell XPS 9570 and Precision M5530

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Message-ID: <CAHp75VdPQuEwNOOakvZpC1gzWB9p5yx+CHUjRgMDZ9ZDvxGckQ@mail.gmail.com>
Date:   Tue, 30 Jan 2018 20:17:55 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Kai-Heng Feng <kai.heng.feng@...onical.com>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mario Limonciello <mario.limonciello@...l.com>
Subject: Re: [PATCH] ACPI: Parse entire table as a term_list for Dell XPS 9570
 and Precision M5530

On Tue, Jan 30, 2018 at 8:07 AM, Kai-Heng Feng
<kai.heng.feng@...onical.com> wrote:
> The i2c touchpad on Dell XPS 9570 and Precision M5530 doesn't work out
> of box.
>
> The touchpad relies on its _INI method to update its _HID value from
> XXXX0000 to SYNA2393.
> Also, the _STA relies on value of I2CN to report correct status.
>
> Set acpi_gbl_parse_table_as_term_list so the value of I2CN can be
> correctly set up, and _INI can get run. The ACPI table in this machine
> is designed to get parsed this way.
>
> Also, change the quirk table to a more generic name.

> +static int set_gbl_term_list(const struct dmi_system_id *id)
> +{
> +       pr_notice("%s detected - parse the entire table as a term_list\n",
> +                 id->ident);
> +       acpi_gbl_parse_table_as_term_list = 1;
> +       return 0;
> +}
>  #endif

The above should be outside of another #ifdef. Basically after the above #endif.

>  #else

>  #endif

> @@ -1005,7 +1034,7 @@ void __init acpi_early_init(void)

>          * If the machine falls into the DMI check table,
>          * DSDT will be copied to memory
>          */

It might make sense to adjust comment above that it's about quirks in
general. And, if needed, move current content to actual DMI group of
records.

> -       dmi_check_system(dsdt_dmi_table);
> +       dmi_check_system(acpi_quirks_dmi_table);

-- 
With Best Regards,
Andy Shevchenko