From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Jérôme de Bretagne <jerome.debretagne@gmail.com>,
Douglas Anderson <dianders@chromium.org>,
Neil Armstrong <neil.armstrong@linaro.org>,
Jessica Zhang <jesszhan0024@gmail.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>
Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
Krzysztof Kozlowski <krzk@kernel.org>
Subject: Re: [PATCH 02/11] arm64: dts: qcom: sc8280xp-arcata: Enable backlight
Date: Thu, 21 May 2026 10:48:32 +0200 [thread overview]
Message-ID: <624a780c-0b22-45e3-aec5-e61c319de901@oss.qualcomm.com> (raw)
In-Reply-To: <f5f70aa2-a1b8-40e0-838f-6709e6e08a5a@gmail.com>
On 5/21/26 12:26 AM, Jérôme de Bretagne wrote:
> On 5/20/26 18:40, Jérôme de Bretagne via B4 Relay wrote:
>> From: Jérôme de Bretagne <jerome.debretagne@gmail.com>
>>
>> Add backlight nodes and enable backlight so that it can be controlled
>> with the corresponding buttons found on Surface Pro Type Cover keyboards.
>>
>> The nodes are almost identical to the ones from the ThinkPad X13s with
>> a different enable GPIO for the vreg_edp_bl node.
>>
>> The difference was found by looking at the output of /sys/kernel/debug/gpio
>> on the ThinkPad X13s to see the properties of its enable gpio9:
[...]
> and ... backlight still works! It can also be enabled/disabled with:
> /sys/class/backlight/backlight/bl_power
> as expected.
>
> I have no clue why both gpio6 on pmc8280_2 and gpio6 on pmc8280c can enable and disable the backlight. Is it a common scenario?
Could it be that one of them is an ENABLE_BL pin, while the other one
enables the regulator?
Konrad
next prev parent reply other threads:[~2026-05-21 8:48 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-20 16:40 [PATCH 00/11] Microsoft Surface Pro 9 5G update Jérôme de Bretagne via B4 Relay
2026-05-20 16:40 ` [PATCH 01/11] drm/panel: edp: Add LG LP129WT232166 panel Jérôme de Bretagne via B4 Relay
2026-05-21 16:21 ` Doug Anderson
2026-05-25 11:20 ` Claude review: " Claude Code Review Bot
2026-05-20 16:40 ` [PATCH 02/11] arm64: dts: qcom: sc8280xp-arcata: Enable backlight Jérôme de Bretagne via B4 Relay
2026-05-20 22:26 ` Jérôme de Bretagne
2026-05-21 8:48 ` Konrad Dybcio [this message]
2026-05-21 17:57 ` Jérôme de Bretagne
2026-05-25 11:20 ` Claude review: " Claude Code Review Bot
2026-05-20 16:40 ` [PATCH 03/11] arm64: dts: qcom: sc8280xp-arcata: Enable the eDP display Jérôme de Bretagne via B4 Relay
2026-05-21 8:50 ` Konrad Dybcio
2026-05-21 18:09 ` Jérôme de Bretagne
2026-05-25 11:20 ` Claude review: " Claude Code Review Bot
2026-05-20 16:40 ` [PATCH 04/11] arm64: dts: qcom: sc8280xp-arcata: add USB-C orientation GPIOs Jérôme de Bretagne via B4 Relay
2026-05-21 8:52 ` Konrad Dybcio
2026-05-21 18:04 ` Jérôme de Bretagne
2026-05-25 11:20 ` Claude review: " Claude Code Review Bot
2026-05-20 16:40 ` [PATCH 05/11] arm64: dts: qcom: sc8280xp-arcata: Fix top USB-C DP alt mode Jérôme de Bretagne via B4 Relay
2026-05-21 8:53 ` Konrad Dybcio
2026-05-21 17:59 ` Jérôme de Bretagne
2026-05-25 11:20 ` Claude review: " Claude Code Review Bot
2026-05-20 16:40 ` [PATCH 06/11] arm64: dts: qcom: sc8280xp-arcata: Enable 4-lane DP support Jérôme de Bretagne via B4 Relay
2026-05-22 9:36 ` Konrad Dybcio
2026-05-25 11:20 ` Claude review: " Claude Code Review Bot
2026-05-20 16:40 ` [PATCH 07/11] arm64: dts: qcom: sc8280xp-arcata: Add volume up/down GPIO keys Jérôme de Bretagne via B4 Relay
2026-05-21 8:54 ` Konrad Dybcio
2026-05-25 11:20 ` Claude review: " Claude Code Review Bot
2026-05-20 16:40 ` [PATCH 08/11] arm64: dts: qcom: sc8280xp-arcata: Add lid switch Jérôme de Bretagne via B4 Relay
2026-05-21 8:54 ` Konrad Dybcio
2026-05-25 11:20 ` Claude review: " Claude Code Review Bot
2026-05-20 16:40 ` [PATCH 09/11] arm64: dts: qcom: sc8280xp-arcata: model the PMU of the on-board wcn6855 Jérôme de Bretagne via B4 Relay
2026-05-21 8:57 ` Konrad Dybcio
2026-05-25 11:20 ` Claude review: " Claude Code Review Bot
2026-05-20 16:40 ` [PATCH 10/11] arm64: dts: qcom: sc8280xp-arcata: Switch to uefi rtc offset Jérôme de Bretagne via B4 Relay
2026-05-21 8:57 ` Konrad Dybcio
2026-05-25 11:20 ` Claude review: " Claude Code Review Bot
2026-05-20 16:40 ` [PATCH 11/11] arm64: dts: qcom: sc8280xp-arcata: Drop duplicate DMIC supplies Jérôme de Bretagne via B4 Relay
2026-05-21 8:58 ` Konrad Dybcio
2026-05-25 11:20 ` Claude review: " Claude Code Review Bot
2026-05-25 11:20 ` Claude review: Microsoft Surface Pro 9 5G update Claude Code Review Bot
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