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[2001:1c00:c1e:bf00:1054:9d19:e0f0:8214]) by smtp.gmail.com with ESMTPSA id de36sm1449430ejc.54.2021.11.03.10.34.56 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 03 Nov 2021 10:34:57 -0700 (PDT) Message-ID: <25338ce1-c663-3a3d-550f-5c8f74270615@redhat.com> Date: Wed, 3 Nov 2021 18:34:56 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.0 Subject: Re: [PATCH v2 3/3] backlight: lp855x: Add support ACPI enumeration Content-Language: en-US To: Daniel Thompson Cc: Lee Jones , Jingoo Han , Tsuchiya Yuto , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <20211102225504.18920-1-hdegoede@redhat.com> <20211102225504.18920-3-hdegoede@redhat.com> <20211103171756.wxthncse2f4syeiz@maple.lan> <5d431db5-30dc-b51c-7abb-ab57a3de2f8f@redhat.com> <20211103173107.xlchsysme5xzpn24@maple.lan> From: Hans de Goede In-Reply-To: <20211103173107.xlchsysme5xzpn24@maple.lan> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On 11/3/21 18:31, 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 >>> >>> Reviewed-by: Daniel Thompson >> >> 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). Ok, thanks. Regards, Hans