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[2001:14ba:a073:af00:264b:feff:fe8b:be8a]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-395d9665f78sm209971fa.27.2026.05.21.13.24.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 May 2026 13:24:49 -0700 (PDT) Date: Thu, 21 May 2026 23:24:46 +0300 From: Dmitry Baryshkov To: Jun Nie Cc: Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Neil Armstrong , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: Re: [PATCH v4 4/5] dt-bindings: display: Add Synaptics R63455 panel support Message-ID: <2w6cpuzwxht2dv7a3xj57ukuzqa2b77ba2syl2ewdmq5bprczb@g3rm2k7e4l4h> References: <20260521-sm8650-7-1-bonded-dsi-v4-0-a4dd5e0850f1@linaro.org> <20260521-sm8650-7-1-bonded-dsi-v4-4-a4dd5e0850f1@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260521-sm8650-7-1-bonded-dsi-v4-4-a4dd5e0850f1@linaro.org> X-Proofpoint-GUID: PL2UqYxI2W45kCFBon8S-nsITPyok3Ao X-Proofpoint-ORIG-GUID: PL2UqYxI2W45kCFBon8S-nsITPyok3Ao X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTIxMDIwNSBTYWx0ZWRfX3dw12GZQY2Y9 8GT7n6u9CHg1bhgNzcErrBwBrnsVccPZTewAurTox2WCLfaL8r4MxD2BL4Radt0s/Q7xFU/JSDU LrHvbzNxlzdy5uHlGAAm5jxLGnHOoTbpohusBu2KRK7xGF0+8uCL6UthBUSm257g2jKbsAMxex/ hVupIzpulUH+u65j5JrROTXCMIMFsH/KDBuZCPxySIZX3/7UvB3Hklzt+vhGY7F8K26VQMkb/IZ EPVhmqMKZPha7qg5jlCY8SOCXZT0lEUoR4EqVE7yPbOB1uETG5GI+PP5ep2HUqDiP0I+yIyavyz wG3tGLQIRYbobkXohDuYKz8eLsUGh6+STvFbAPLP3FJ/DUB3wG4eQt+W5ipSnWZmW9P1cNsfDiV egbl3wGSb69/N8S8FcSU1+D+iMu+ax6MrGI6x1zEd2AyLYnhFBzLqKbMC2ex/ts8Azuvzv8xWxL cEGQ+SBbjdP858QkvZw== X-Authority-Analysis: v=2.4 cv=L+YtheT8 c=1 sm=1 tr=0 ts=6a0f6a14 cx=c_pps a=JbAStetqSzwMeJznSMzCyw==:117 a=xqWC_Br6kY4A:10 a=kj9zAlcOel0A:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=gEfo2CItAAAA:8 a=KKAkSRfTAAAA:8 a=5IMEwuT189ni8Q75ZTYA:9 a=CjuIK1q_8ugA:10 a=uxP6HrT_eTzRwkO_Te1X:22 a=sptkURWiP4Gy88Gu7hUp:22 a=cvBusfyB2V15izCimMoJ:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-21_04,2026-05-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 priorityscore=1501 malwarescore=0 bulkscore=0 lowpriorityscore=0 phishscore=0 clxscore=1015 adultscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605210205 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Thu, May 21, 2026 at 10:46:06PM +0800, Jun Nie wrote: > Add support for the dual-panel system found in the virtual reality device. > This system consists of two physical 2160x2160 panels, each connected via > a MIPI DSI interface. The backlight is managed through DSI link. > > Signed-off-by: Jun Nie > --- > .../bindings/display/panel/synaptics,r63455.yaml | 125 +++++++++++++++++++++ > 1 file changed, 125 insertions(+) > > diff --git a/Documentation/devicetree/bindings/display/panel/synaptics,r63455.yaml b/Documentation/devicetree/bindings/display/panel/synaptics,r63455.yaml > new file mode 100644 > index 0000000000000..a94b355ed9557 > --- /dev/null > +++ b/Documentation/devicetree/bindings/display/panel/synaptics,r63455.yaml > @@ -0,0 +1,125 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/display/panel/synaptics,r63455.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Synaptics R63455 based dual 2160x2160 MIPI-DSI Panel > + > +maintainers: > + - Jun Nie > + > +description: > + Synaptics R63455 is a Virtual Reality Display Driver and VR Bridge, used in > + pair in Headset devices. The Virtual Reality Display complex is composed of > + two strictly identical display panels, each driven by its own DSI interface > + but forms a single virtual display for the human eye perception and thus > + requires a strict synchronization of the two display panel content update. > + > +allOf: > + - $ref: panel-common.yaml# > + > +properties: > + compatible: > + items: > + - enum: > + - sharp,ls026b3sa06 > + - boe,vs026c4m-n52-6000 > + - const: synaptics,r63455 > + > + reset-gpios: > + maxItems: 2 > + description: 2 reset pins for 2 physical panels > + > + left-pos-supply: > + description: Positive 5.7V supply for left panel So, is the R63455 driving both panels or are there two panels, each having R63455 controller? What if somebody gets a single Sharp panel and wants to use it in their device? How will it match these bindings? > + > + right-pos-supply: > + description: Positive 5.7V supply for right panel > + > + left-neg-supply: > + description: Negative 5.7V supply for left panel > + > + right-neg-supply: > + description: Negative 5.7V supply for right panel > + > + left-backlight-supply: > + description: Backlight 21V supply for left panel > + > + right-backlight-supply: > + description: Backlight 21V supply for right panel > + > + vdda-supply: > + description: core 1.8V supply for panels > + > + ports: $ref: /schemas/graph.yaml#/properties/ports > + > +required: > + - compatible > + - reset-gpios > + - left-pos-supply > + - left-neg-supply > + - right-pos-supply > + - right-neg-supply > + - left-backlight-supply > + - right-backlight-supply > + - vdda-supply > + > +additionalProperties: false > + > +examples: > + - | > + #include > + > + &mdss_dsi0 { Please drop the MDSS specifics, there should be one (or two) DSI busses, driving your panels. The rests are details which are not necessary for the example. > + vdda-supply = <&vreg_l3i_1p2>; > + status = "okay"; > + > + qcom,dual-dsi-mode; > + qcom,master-dsi; > + > + panel: panel@0 { > + compatible = "sharp,ls026b3sa06", "synaptics,r63455"; > + reg = <0>; > + > + reset-gpios = <&pm8550_gpios 3 GPIO_ACTIVE_HIGH>, > + <&pm8550_gpios 11 GPIO_ACTIVE_HIGH>; > + > + left-pos-supply = <&vpos_left>; > + left-neg-supply = <&vneg_left>; > + right-pos-supply = <&vpos_right>; > + right-neg-supply = <&vneg_right>; > + left-backlight-supply = <&backlight_left>; > + right-backlight-supply = <&backlight_right>; > + > + vdda-supply = <&vreg_l12b_1p8>; > + > + ports { > + #address-cells = <1>; > + #size-cells = <0>; > + port@0 { > + reg = <0>; > + panel0_in: endpoint { > + remote-endpoint = <&mdss_dsi0_out>; What is mdss_dsi0_out? > + }; > + }; > + > + port@1 { > + reg = <1>; > + panel1_in: endpoint { > + remote-endpoint = <&mdss_dsi1_out>; > + }; > + }; > + }; > + }; > + > + &mdss_dsi0_out { > + remote-endpoint = <&panel0_in>; > + data-lanes = <0 1 2>; > + }; > + > + &mdss_dsi1_out { > + remote-endpoint = <&panel1_in>; > + data-lanes = <0 1 2>; > + }; > +... > > -- > 2.43.0 > -- With best wishes Dmitry