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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Info: AW1haW4tMjYxMDE2MDA1NCBTYWx0ZWRfX7JU2vlBiJ3YR o3CQE1eDwMyWOO7tMQONC55Ql3li4Qx2etB34IuysO8D5UTF8DSiLUE2N/oZkr4phk2YoOq8jSu yFgcsxv9aMLAWyu9BNxBEWXanIPJrkA= X-Authority-Analysis: v=2.4 cv=P9uvFSAu c=1 sm=1 tr=0 ts=6ad229ad cx=c_pps a=wEM5vcRIz55oU/E2lInRtA==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=bC-a23v3AAAA:8 a=VwQbUJbxAAAA:8 a=iLNU1ar6AAAA:8 a=KKAkSRfTAAAA:8 a=EUspDBNiAAAA:8 a=gXMl86fzaOV-y-lz5Y0A:9 a=QEXdDO2ut3YA:10 a=OIgjcC2v60KrkQgK7BGD:22 a=FO4_E8m0qiDe52t0p3_H:22 a=cvBusfyB2V15izCimMoJ:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDE2MDA1NCBTYWx0ZWRfX/B6WLRtKa0oT YBmMdSaEQoVBC4vksYoURc++kRVhoGjyvwH72ZtnpYbuCvksEqQgKyfvNalxmPhVaMoTx405aX0 p5ABxChRzqrSOYdAMwMnNl2rfNMQxQXUayAbo3KROEQPE8fUf0vPSFEseDNi1v1NTH7LpSAN3VM /GeCZ6PcUNRs32XDwvxmEWenQEUdJWI0Ok1Y+ebYdDyRwDwS7kVBUv5UHEeFTKLtd9v42kiuIUi 7NFauyzAKg0kfUyabWKr9wDcKpBe+dtoJfM0xlyGwEM9n8M+V9EB9asBzJ+pVL1ZRQ9LdDHoeKL lbR7LJA4kbcaw7oVkryf6JaJ0pIe3Dgpt9H9YtAMUcZX1Ed3+KgeMHQ4XfDaldXuypw+sQGd64G GUnCxUSnCL3hyCjEEBP0c1UJIg1u1drhx/WLGjsVfV3wSKwesLFNoTIfR4xQZ3qDZoQOpztBhmN Gmr4gTyJEMuO9XYUuXg== X-Proofpoint-GUID: jHJvRVb7FosCWmmoH7hHpjkW1icnQkKl X-Proofpoint-ORIG-GUID: jHJvRVb7FosCWmmoH7hHpjkW1icnQkKl X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-16_01,2026-10-14_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 suspectscore=0 phishscore=0 adultscore=0 lowpriorityscore=0 clxscore=1015 priorityscore=1501 bulkscore=0 impostorscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610080000 definitions=main-2610160054 On 9/15/26 12:04 AM, 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. > > Fixes: e7733b42111c ("arm64: dts: qcom: Add support for Dell Inspiron 7441 / Latitude 7455") > 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. This is a prerequisite for all contributions. Bryan, does the touchscreen work for you without this patch? Is this simply double-sourcing? Konrad > > Validation: Linux 7.2.4 plus the equivalent local DT overlay, physical > --- > Changes in v3: > - Add the Fixes tag for the commit that introduced the incorrect address. > - Link to v2: https://patch.msgid.link/20260914-dell7441-touchscreen-v2-1-7f7224c0cce5@est.una.ac.cr > > Changes in v2: > - Drop the testing details from the commit message as requested. > - Link to v1: https://patch.msgid.link/20260914-dell7441-touchscreen-v1-1-d79540ca5e81@est.una.ac.cr > > To: Bjorn Andersson > To: Konrad Dybcio > To: Rob Herring > To: Krzysztof Kozlowski > To: Conor Dooley > To: Laurentiu Tudor > To: Bryan O'Donoghue > To: Val Packett > Cc: Konrad Dybcio > Cc: linux-arm-msm@vger.kernel.org > Cc: devicetree@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > --- > 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 75e10d97c..0cf5716cd 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>; > > --- > base-commit: 704340f1cd0dcef829eb62f5b48ae95a2ce17bdf > change-id: 20260914-dell7441-touchscreen-6b6201348ab6 > > Best regards, > -- > Avalon Vargas