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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3351c2bd2b0sm359941eec.8.2026.09.04.12.37.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Sep 2026 12:37:10 -0700 (PDT) Date: Sat, 5 Sep 2026 01:07:04 +0530 From: Vishnu Saini To: Konrad Dybcio Cc: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, venkata.valluru@oss.qualcomm.com, Jessica Zhang Subject: Re: [PATCH v2 1/3] arm64: dts: qcom: lemans-evk: Add LVDS display overlay Message-ID: References: <20260813-lvds-support-v2-0-6b11035e8ab0@oss.qualcomm.com> <20260813-lvds-support-v2-1-6b11035e8ab0@oss.qualcomm.com> <049af81c-d05d-4ce4-9627-8b2212979f4c@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <049af81c-d05d-4ce4-9627-8b2212979f4c@oss.qualcomm.com> X-Proofpoint-Spam-Info: AW1haW4tMjYwOTA0MDE4MCBTYWx0ZWRfXxUkmCmZJKV2f 9dLe7BRcYWDs0PC47cIT+k6RsBuQOGqmk23Oycrl8u7YB/QlJPSJzYBWYlYeFcvJhvc61kQnBZO QyFbGrE1qN/3z1bcenxqeYFSi7aE988= X-Authority-Analysis: v=2.4 cv=TP11jVla c=1 sm=1 tr=0 ts=6a9b1de8 cx=c_pps a=Oh5Dbbf/trHjhBongsHeRQ==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=kj9zAlcOel0A:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=EUspDBNiAAAA:8 a=XpLG6VMlNpcyACpXrrQA:9 a=CjuIK1q_8ugA:10 a=_Vgx9l1VpLgwpw_dHYaR:22 X-Proofpoint-ORIG-GUID: wvwAnGmzvak9I-njxHR3-R1x_uUMydfs X-Proofpoint-GUID: wvwAnGmzvak9I-njxHR3-R1x_uUMydfs X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTA0MDE4MCBTYWx0ZWRfXzyBAlXLk7TLg 5TcEGrqg4OxGhREgbBAdnoGcW+alVZfjG6hIy0zX8cG1ErhBVwhZXOZunytqu1N7Lrrwtdgvyzw 9LEta57HRuT58eWyFgdA1qRUYBehzfQiJy9o8TIlVueKQd1yBnqizbnMQXr1tjKG4FeBIPAizI0 gEb4l40nw8pe6hBS+TOn3Itoe3o6xVMhHTQKnM812pFMkDIFgi3WNVXe8c9n198CrjyXNT20kH3 hE6n6o/Ne+wwF7yAFybSQhw+xaaxeDe9W1cxwM/I77DqH8GyLD/sWtikeb065mHeGWWUH45i6GQ wERn508+fLaM9q/qIjoGYRN80T0dDVku9tEH2xcSP+k6fXAOKsRQAcTR05j3i5tM2qW3NuUhaha X/lvjAmkfJFrOHSZXVb/9+8OimjbTqwZa71Psvqmgrqtk/+UCguS62JjjQLYakLybKVwzzPc4TO zVhAUC1V+HZfjnTDFNQ== 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=2026-09-04_05,2026-09-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 bulkscore=0 spamscore=0 phishscore=0 lowpriorityscore=0 impostorscore=0 clxscore=1015 suspectscore=0 malwarescore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609040180 On Thu, Sep 03, 2026 at 03:06:10PM +0200, Konrad Dybcio wrote: > On 8/13/26 7:33 PM, 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. > > > > The overlay is built as a composite DTB combining the base > > lemans-evk.dtb, the IFP mezzanine overlay, and this LVDS overlay. > > > > Signed-off-by: Vishnu Saini > > --- > > [...] > > > + panel_lvds: panel-lvds { > > + compatible = "boe,dv215fhm-r01"; > > + power-supply = <&lcd_disp_bias>; > > + > > + status = "okay"; > > Nodes are enabled by default unless explicitly disabled Yes, status = "okay"; will be removed in next revision from all such instances. > > + > > + ports { > > + #address-cells = <1>; > > + #size-cells = <0>; > > + > > + port@0 { > > + reg = <0>; > > + dual-lvds-odd-pixels; > > + panel_in_lvds_odd: endpoint { > > Please keep a \n between the last property and the following subnodes Yes, This will be fixed at all the places in next revision. > [...] > > > + lt9211c_codec: lvds-bridge@2d { > > + compatible = "lontium,lt9211c"; > > + reg = <0x2d>; > > + reset-gpios = <&tlmm 37 GPIO_ACTIVE_HIGH>; > > + vccio-supply = <&vreg_s4a>; > > + > > + status = "okay"; > > ditto > > [...] > > > +&mdss0 { > > + status = "okay"; > > +}; > > The DT which you overlay this atop already enables it Yes, will remove this from overlay. > Konrad > > > + > > +&mdss0_dsi0 { > > + vdda-supply = <&vreg_l1c>; > > + > > + status = "okay"; > > +}; > > + > > +&mdss0_dsi0_out { > > + data-lanes = <0 1 2 3>; > > + remote-endpoint = <<9211c_in>; > > +}; > > + > > +&mdss0_dsi0_phy { > > + vdds-supply = <&vreg_l4a>; > > + > > + status = "okay"; > > +}; > >