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

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Date:   Wed, 31 Jan 2018 12:20:04 +0800
From:   Kai Heng Feng <kai.heng.feng@...onical.com>
To:     Andy Shevchenko <andy.shevchenko@...il.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 31 Jan 2018, at 2:17 AM, Andy Shevchenko <andy.shevchenko@...il.com> wrote:
> 
> 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.

Right, I overlooked that. Thanks.

> 
>> #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.

Thanks for the suggestions.

I’ll address them in patch v3.

Kai-Heng

> 
>> -       dmi_check_system(dsdt_dmi_table);
>> +       dmi_check_system(acpi_quirks_dmi_table);
> 
> -- 
> With Best Regards,
> Andy Shevchenko