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Mon, 07 Sep 2026 04:40:56 -0700 (PDT) X-Received: by 2002:a05:620a:9c4:b0:939:9205:4d78 with SMTP id af79cd13be357-93992054effmr848927285a.3.1788781255580; Mon, 07 Sep 2026 04:40:55 -0700 (PDT) Received: from [192.168.202.12] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c260d503f96sm452876766b.26.2026.09.07.04.40.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 07 Sep 2026 04:40:54 -0700 (PDT) Message-ID: <5954fbc2-08c2-4509-8703-ab20d57be309@oss.qualcomm.com> Date: Mon, 7 Sep 2026 13:40:52 +0200 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 v3 1/3] arm64: dts: qcom: lemans-evk: Add LVDS display overlay To: Vishnu Saini , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, venkata.valluru@oss.qualcomm.com, Jessica Zhang References: <20260905-lvds-support-v3-0-b40a1b03f63c@oss.qualcomm.com> <20260905-lvds-support-v3-1-b40a1b03f63c@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260905-lvds-support-v3-1-b40a1b03f63c@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: GfW1lmaU5NpZC3TDwxIrVrD0cWgaITKD X-Authority-Analysis: v=2.4 cv=U+aiy+ru c=1 sm=1 tr=0 ts=6a9ea2c9 cx=c_pps a=HLyN3IcIa5EE8TELMZ618Q==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=hb4hLJ562k5UIXpG1yUA:9 a=QEXdDO2ut3YA:10 a=bTQJ7kPSJx9SKPbeHEYW:22 X-Proofpoint-GUID: GfW1lmaU5NpZC3TDwxIrVrD0cWgaITKD X-Proofpoint-Spam-Info: AW1haW4tMjYwOTA3MDEyOCBTYWx0ZWRfX6tZgSa2TXXZN KdJgyokq2ckfIK+MP6kvTRDvmBe3nJoM6dCP7TAlm1GFF7JHAM0YeeUQzrVNC5YJ+Dv+vAWhhAt klS4Bv+imfn3rd3R+kq89CuWSXsO6vE= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTA3MDEyOCBTYWx0ZWRfXxzLbZJobxzlb 07i7R0QBHWlG+2E61H0kuAfsQ4rO7KNcoawoqLEaNihHw0r7JyhjIz2DuSrUEP9olMPn7/SKr3h U0j6qC59suyMxu3AAGib4q4bd4yBjsoBdpJdpPibRYXpmzN8js+OdpDPcvq5j28QU2cwiQMMU37 8hpi6eRjFk6XyWgnpNIFbUfJBLAvmzdKa3s0C92uW+y86wK+MV+fZCInvWkFlHZ0eiqMtnpFWbZ 7LVF4BmVh5U/MO7zKoOkBOnqbQ+GDtWXBiSEZ8fpxGjU7lHw0FElMO74n7nhu+tYtIc+3+tN1Zw 2iD9+cbnTDNhcH0Fsf5MrGiEie8F/7QyxnfWcynyjepUKQuxZH12LeUWnPO7kYQ+ExvvBRH+/HX 82UkgwrG7VRu/XdXKxA/jEdlE5lEXCCbrPfYEnPDtfTTgutcPlFwp2AVwmAgRNW0B7GTuoMjbyy QQQ6qm/RY/9WURHWHBg== 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=2026-09-07_03,2026-09-07_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 suspectscore=0 priorityscore=1501 lowpriorityscore=0 clxscore=1015 impostorscore=0 adultscore=0 bulkscore=0 spamscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609070128 On 9/5/26 3:30 AM, Vishnu Saini wrote: > The Lemans EVK IFP mezzanine supports LVDS display output using the > Lontium LT9211C DSI-to-LVDS bridge. The bridge is connected to the > DSI0 output and drives a dual-channel 1920x1080 LVDS panel in > VESA-24 mapping. > > Add a DTBO overlay, lemans-evk-lvds-boe,dv215fhm-r01.dtso, that wires > up the LT9211C bridge on I2C1 (address 0x2d) with reset on GPIO37, > a panel-lvds node for the boe,dv215fhm-r01 panel (matched against the > panel-simple-lvds-dual-ports binding, which supplies the panel's size > and timing internally), and an LCD display bias regulator supplied > through the GPIO expander. DSI power is provided by vreg_s4a. [...] > --- a/arch/arm64/boot/dts/qcom/Makefile > +++ b/arch/arm64/boot/dts/qcom/Makefile > @@ -58,6 +58,10 @@ lemans-evk-el2-dtbs := lemans-evk.dtb lemans-el2.dtbo > dtb-$(CONFIG_ARCH_QCOM) += lemans-evk-el2.dtb > lemans-evk-ifp-mezzanine-dtbs := lemans-evk.dtb lemans-evk-ifp-mezzanine.dtbo > dtb-$(CONFIG_ARCH_QCOM) += lemans-evk-ifp-mezzanine.dtb > + > +lemans-evk-lvds-boe,dv215fhm-r01-dtbs := lemans-evk.dtb lemans-evk-ifp-mezzanine.dtbo lemans-evk-lvds-boe,dv215fhm-r01.dtbo > +dtb-$(CONFIG_ARCH_QCOM) += lemans-evk-lvds-boe,dv215fhm-r01.dtb I have very mixed feelings regarding putting a comma in the filename.. > + > dtb-$(CONFIG_ARCH_QCOM) += mahua-crd.dtb > dtb-$(CONFIG_ARCH_QCOM) += milos-fairphone-fp6.dtb > dtb-$(CONFIG_ARCH_QCOM) += milos-nothing-asteroids.dtb > diff --git a/arch/arm64/boot/dts/qcom/lemans-evk-lvds-boe,dv215fhm-r01.dtso b/arch/arm64/boot/dts/qcom/lemans-evk-lvds-boe,dv215fhm-r01.dtso > new file mode 100644 > index 000000000000..bd3e13c46a1e > --- /dev/null > +++ b/arch/arm64/boot/dts/qcom/lemans-evk-lvds-boe,dv215fhm-r01.dtso > @@ -0,0 +1,113 @@ > +// SPDX-License-Identifier: BSD-3-Clause > +/* > + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. > + */ > + > +/dts-v1/; > +/plugin/; > + > +#include > + > +&{/} { > + model = "Qualcomm Technologies, Inc. Lemans EVK LVDS"; > + > + panel_lvds: panel-lvds { nit: this label is unused Konrad