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Sat, 18 Jul 2026 04:24:15 -0700 (PDT) Received: from hu-mdsor-hyd.qualcomm.com ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3142a20cfe3sm17579432eec.30.2026.07.18.04.24.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Jul 2026 04:24:14 -0700 (PDT) Date: Sat, 18 Jul 2026 16:54:07 +0530 From: Mohit Dsor To: Konrad Dybcio Cc: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, venkata.valluru@oss.qualcomm.com, Jessica Zhang , Mohit Dsor Subject: Re: [PATCH v2 1/2] arm64: dts: qcom: shikra-iqs-evk: Add LT9611UXD HDMI bridge support Message-ID: References: <20260717-shikra-work-v2-0-86ae8552259e@oss.qualcomm.com> <20260717-shikra-work-v2-1-86ae8552259e@oss.qualcomm.com> <04a9d8ce-e83a-4307-8b14-4afe739b31e0@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: <04a9d8ce-e83a-4307-8b14-4afe739b31e0@oss.qualcomm.com> X-Proofpoint-Spam-Info: AW1haW4tMjYwNzE4MDExNSBTYWx0ZWRfX15TigtWvh18K WMKXO4AExxeYS2vSqeXNKnKQO8Ii0yOvhR/fNH5InhWWHqWFhCdyxsHBuEiZpyJu0KtZOfkzal8 J8c9iFa5wCvIC5q1rhID89g91ZmQsb8= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzE4MDExNSBTYWx0ZWRfX4aAxP6EJUMU7 2/jAlGS0dsmQ3guBAmkuYf1n21+vN/AFzibAqG0DBRONpp0oTt2ycSWPF93xxvlztZRJd9xyqtE jeAO0n5f2UlbK4vylcQzeea5TIk1JxqoEV4dgosgB2k5bIGKAAsEzAqdDj4AwlzcxyhhXRM60Fb qP1oOfqCNnmqKSUiWYYou/SwuTCz4tEHohNLMxt6/p7utyUNhRPIBkYXcgemkjtUbOlqn2NJ8iP zq+FJ21p8HtVF4UfJAP4z/ZLv2iPNYKZjuTwbo0q2dDqIZhF2zf3ExAjOxPujI8sHFeO9Epi6Zs zmiSYojCwW79gdNs5SWCg6AbY/UQ/+gNeNiGMgahL279o9li61C83fUbcVM5HeOISNiGmpnhpKs vlp4emtQ5Vhvnq+VzzHwAMiCkD+Nhn6+qcSIdBfGwcCkc0IEK2qozGFdVtLCNQN6E2PyMSx7y62 ml1NWJ8LWkt472Pwc5Q== X-Proofpoint-ORIG-GUID: gtkJXvJtPZdB6U1zw56BRLgmixyVAb2Y X-Proofpoint-GUID: gtkJXvJtPZdB6U1zw56BRLgmixyVAb2Y X-Authority-Analysis: v=2.4 cv=FOQrAeos c=1 sm=1 tr=0 ts=6a5b6260 cx=c_pps a=oF/VQ+ItUULfLr/lQ2/icg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=kj9zAlcOel0A:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=EUspDBNiAAAA:8 a=yFymH_mhhIGMXtPSOccA:9 a=CjuIK1q_8ugA:10 a=3WC7DwWrALyhR5TkjVHa:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-18_03,2026-07-17_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 suspectscore=0 adultscore=0 bulkscore=0 spamscore=0 malwarescore=0 priorityscore=1501 lowpriorityscore=0 phishscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607180115 On Fri, Jul 17, 2026 at 11:17:10AM +0200, Konrad Dybcio wrote: > On 7/16/26 9:30 PM, mohit.dsor@oss.qualcomm.com wrote: > > From: Mohit Dsor > > > > Enable the Shikra MDSS display subsystem on the Qualcomm Shikra IQS > > EVK board and add the Lontium LT9611UXD DSI-to-HDMI bridge node. > > > > The LT9611UXD is connected via I2C (bus 4, address 0x41), powered by > > a GPIO-controlled 3.3V regulator (PM8150 GPIO4) and an always-on 1.8V > > rail. Reset is on GPIO76 and interrupt on GPIO85. > > > > The bridge receives DSI output from MDSS and drives an HDMI-A > > connector, with the link wired as: DPU -> DSI0 -> LT9611UXD -> HDMI. > > > > Signed-off-by: Mohit Dsor > > --- > > Does the other EVK not have this same hardware? Yes other variants have this hardware but only IQS variant has DS-HDMI as default, others have DLC panel as default. > > [...] > > > +&pm8150_l11 { > > + /* DSI VDDA - must be at NOM voltage for PHY PLL lock */ > > This comment is superfluous This comment will be removed in next revision. > > Konrad