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Mon, 14 Sep 2026 13:15:25 -0700 (PDT) Message-ID: Date: Mon, 14 Sep 2026 21:15:23 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] arm64: dts: qcom: Fix touchscreen address on Dell Inspiron 7441 To: avalon.vargas.centeno@est.una.ac.cr, Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Val Packett , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260914-dell7441-touchscreen-v1-1-d79540ca5e81@est.una.ac.cr> From: Bryan O'Donoghue Content-Language: en-US In-Reply-To: <20260914-dell7441-touchscreen-v1-1-d79540ca5e81@est.una.ac.cr> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 14/09/2026 14:30, Avalon Vargas via B4 Relay wrote: > From: Avalon Vargas > > The LXST2021 touchscreen on the tested Dell Inspiron 14 Plus 7441 > responds at I2C address 0x09, while the device tree specifies 0x10. > Probing the latter fails with -ENXIO and no touchscreen input device > is registered. > > Use address 0x09, matching the LXST2021 configuration on the related > Dell Latitude 7455. With this address, the controller identifies as > 29BD:1103 and binds to hid-multitouch. Touch input and suspend/resume > have been verified on the affected Inspiron using Linux 7.2.4 with > the equivalent device-tree overlay. > > Signed-off-by: Avalon Vargas > --- > This replaces the earlier report-plus-diff with a patch submission. > Only one unit has been tested. I have no evidence of double-sourcing > or a working Inspiron touchscreen at 0x10; a typo remains possible. > > touch input and suspend/resume. The native upstream patch has not yet > undergone a full kernel DTB build or dtbs_check. > > Validation: Linux 7.2.4 plus the equivalent local DT overlay, physical > --- > arch/arm64/boot/dts/qcom/x1e80100-dell-inspiron-14-plus-7441.dts | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/arch/arm64/boot/dts/qcom/x1e80100-dell-inspiron-14-plus-7441.dts b/arch/arm64/boot/dts/qcom/x1e80100-dell-inspiron-14-plus-7441.dts > index 75e10d9..0cf5716 100644 > --- a/arch/arm64/boot/dts/qcom/x1e80100-dell-inspiron-14-plus-7441.dts > +++ b/arch/arm64/boot/dts/qcom/x1e80100-dell-inspiron-14-plus-7441.dts > @@ -25,9 +25,10 @@ &gpu_zap_shader { > }; > > &i2c8 { > - touchscreen@10 { > + /* LXST2021 */ > + touchscreen@9 { > compatible = "hid-over-i2c"; > - reg = <0x10>; > + reg = <0x09>; > > hid-descr-addr = <0x1>; > interrupts-extended = <&tlmm 51 IRQ_TYPE_LEVEL_LOW>; Nice. A Fix should have a Fixes: tag Cc: stable@vger.kernel.org --- bod