linux-kernel - Re: [PATCH] ACPI: video: Add backlight=native DMI quirk for Lenovo Ideapad Z470

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Message-ID: <ab900b77-5e8f-4a4f-7e0f-c3358b784c01@redhat.com>
Date:   Mon, 17 Apr 2023 15:09:01 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        "Jiri Slaby (SUSE)" <jirislaby@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: [PATCH] ACPI: video: Add backlight=native DMI quirk for Lenovo
 Ideapad Z470

Hi,

On 4/17/23 13:40, Rafael J. Wysocki wrote:
> On Mon, Apr 17, 2023 at 12:48 PM Jiri Slaby (SUSE) <jirislaby@...nel.org> wrote:
>>
>> From: Hans de Goede <hdegoede@...hat.com>
>>
>> The Lenovo Ideapad Z470 predates Windows 8, so it defaults to using
>> acpi_video for backlight control. But this is not functional on this
>> model.
>>
>> Add a DMI quirk to use the native backlight interface which works.
>>
>> Link: https://bugzilla.suse.com/show_bug.cgi?id=1208724
>> Signed-off-by: Jiri Slaby (SUSE) <jirislaby@...nel.org>
>> Cc: Hans de Goede <hdegoede@...hat.com>
>> Cc: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> Hans, can you please give your S-o-b for this one?

Hmm, I do not believe that I wrote this patch
(also see the suse bugzilla link in the comment it adds) ?

I guess it started as a copy of my "ACPI: video: Add
backlight=native DMI quirk for Acer Aspire 3830TG" patch
and that is why I was kept as the author ?

Anyways I'm fine with me being the author, or with Jiri
being the author. Pick a tag depending on the answer:

Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans






> 
>> ---
>>  drivers/acpi/video_detect.c | 9 +++++++++
>>  1 file changed, 9 insertions(+)
>>
>> diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
>> index 69ef2d9710c2..af5cea005f54 100644
>> --- a/drivers/acpi/video_detect.c
>> +++ b/drivers/acpi/video_detect.c
>> @@ -459,6 +459,15 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
>>                 DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"),
>>                 },
>>         },
>> +       {
>> +        /* https://bugzilla.suse.com/show_bug.cgi?id=1208724 */
>> +        .callback = video_detect_force_native,
>> +        /* Lenovo Ideapad Z470 */
>> +        .matches = {
>> +               DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
>> +               DMI_MATCH(DMI_PRODUCT_VERSION, "IdeaPad Z470"),
>> +               },
>> +       },
>>         {
>>          /* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
>>          .callback = video_detect_force_native,
>> --
>> 2.40.0
>>
>