linux-kernel - Re: [PATCH v2 3/3] backlight: lp855x: Add support ACPI enumeration

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Message-ID: <a30f80e5-9969-986c-0c27-f9a391c7686c@redhat.com>
Date:   Thu, 4 Nov 2021 09:53:16 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Lee Jones <lee.jones@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>
Cc:     Jingoo Han <jingoohan1@...il.com>,
        Tsuchiya Yuto <kitakar@...il.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/3] backlight: lp855x: Add support ACPI enumeration

Hi,

On 11/4/21 09:29, Lee Jones wrote:
> On Wed, 03 Nov 2021, Daniel Thompson wrote:
> 
>> On Wed, Nov 03, 2021 at 06:28:15PM +0100, Hans de Goede wrote:
>>> Hi,
>>>
>>> On 11/3/21 18:17, Daniel Thompson wrote:
>>>> On Tue, Nov 02, 2021 at 11:55:04PM +0100, Hans de Goede wrote:
>>>>> The Xiaomi Mi Pad 2 tablet uses an ACPI enumerated LP8556 backlight
>>>>> controller for its LCD-panel, with a Xiaomi specific ACPI HID of
>>>>> "XMCC0001", add support for this.
>>>>>
>>>>> Note the new "if (id)" check also fixes a NULL pointer deref when a user
>>>>> tries to manually bind the driver from sysfs.
>>>>>
>>>>> When CONFIG_ACPI is disabled acpi_match_device() will always return NULL,
>>>>> so the lp855x_parse_acpi() call will get optimized away.
>>>>>
>>>>> Signed-off-by: Hans de Goede <hdegoede@...hat.com>
>>>>
>>>> Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>
>>>
>>> Thank you.
>>>
>>> So what is the process for upstreaming backlight patches,
>>> do these go through drm-misc-next (in that case I can push
>>> the series myself), or will you pick these up ?
>>
>> Lee Jones gathers up the backlight patches and sends a PR (but, except
>> in exceptional cases, treats my R-b as a pre-requisite before doing so).
> 
> Also the merge-window is open, so this is headed for v5.17.

Right, I didn't expect anything else.

Regards,

Hans