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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3ada4890bb2sm7300020a91.1.2026.10.22.23.37.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Oct 2026 23:37:27 -0700 (PDT) Date: Fri, 23 Oct 2026 12:07:19 +0530 From: Vishnu Saini To: Konrad Dybcio Cc: Bjorn Andersson , Konrad Dybcio , Abel Vesa , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Florian Fainelli , Broadcom internal kernel review list , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, venkata.valluru@oss.qualcomm.com, Jessica Zhang , Mohit Dsor , Anand Tiwari , Shashank Maurya Subject: Re: [PATCH 0/7] arm64: dts: qcom: shikra: Add display overlays for EVK boards Message-ID: References: <20261021-shikra_display_overlays-v1-0-adaea735999f@oss.qualcomm.com> <9da45e28-ca6a-47e4-8a04-f1b916552f80@oss.qualcomm.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9da45e28-ca6a-47e4-8a04-f1b916552f80@oss.qualcomm.com> X-Proofpoint-GUID: i4yC13yQtwsv6h9y7syk7-tPsNezAYx3 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDIzMDAyNiBTYWx0ZWRfX3cjjQkjcTvy2 ScExNEKx5MKnZ2x8+GJYg8CIWWd37S3+3O6Y1BNp0Yd3ty4izmXLDH8HprThufjTv+CtBTHPMGH jtI8qgpEdmpq/ZqvK7WnzdGFfNS9/NM= X-Authority-Analysis: v=2.4 cv=VNZIDNPX c=1 sm=1 tr=0 ts=6adb00a8 cx=c_pps a=vVfyC5vLCtgYJKYeQD43oA==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=kj9zAlcOel0A:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=EUspDBNiAAAA:8 a=i8vls60rVJ9ycRQRyeMA:9 a=CjuIK1q_8ugA:10 a=rl5im9kqc5Lf4LNbBjHf:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDIzMDAyNiBTYWx0ZWRfX17ustKI1OVS5 CKT816PI8DNp8yXmkQIugJWkP5j0tFD/qdnVs8e4neS4MF/R3+Eo1dIyTbf5YRXmDT/8iMySOla SF8i7UFtUf6c951GXh5CvdlSwPyjVgZqOp51WQxi+hdheRfw4Pis+6+/cBjqhs7977xXUlWmHn2 GWvQA6AUtfioWgIYSCeImD8qGs511po3YKtCx1FlUZai7mBW6RAHQYr+gMmSNg88IjHnwdBPhjc +Yt82ALG0lW0lR46lrQb8u/WoZvxZU+83wc2+yy/0m2jKhas6Hq82cRKlJOK+fivcXU4AzwF1a3 KGLW6sSat56bbOx+3EEQUVeFXanDFnwN0W0pYNIl6wo6A6ZbeJcg5/vb6WKL3/lCcx20WX26GH+ +QtH19nzVl6H9fdHZoVI70KJ54MkFcD36mxH146zu6tmfgYbcD6nWfXg/l3Hm2n9TA8xmr48B5Y LlRF3RlNjWGNJyR6l/g== X-Proofpoint-ORIG-GUID: i4yC13yQtwsv6h9y7syk7-tPsNezAYx3 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-10-23_01,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 bulkscore=0 adultscore=0 phishscore=0 impostorscore=0 spamscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610230026 On Thu, Oct 22, 2026 at 10:14:54AM +0200, Konrad Dybcio wrote: > On 10/21/26 4:21 PM, vishnu.saini@oss.qualcomm.com wrote: > > Shikra EVK SoC cards (CQS, CQM, and IQS) are mounted on the Lyra carrier > > card. The DSI0 interface from SoC card is routed to either the 22-pin DSI > > connector on carrier card named as JDISP1 DSI0 or to the B2B connector > > named as PDISP1 DSI0, though a MUX which can be selected by a hardware > > DIP switch. There are multiple daughter cards designed that can be > > connected to this PDISP1 DSI0 B2B connector. > > > > The below B2B display interfaces are enabled by default in base DTB: > > - IQS: DSI-to-HDMI using the LT9611UXD daughter card > > - CQS/CMS: DLC0697 DSI panel using a DLC daughter card > > But if they're daughter cards, they should probably be overlays too? These daughter cards are connected by default on the respective boards. Therefore, we keep the default display configuration in the base DT so that users do not need to load an overlay for the default setup. Users who want to use other display interfaces can remove the default daughter card and load the corresponding overlay. > Konrad