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Thu, 27 Jun 2024 22:11:02 -0700 (PDT) Received: from noel.flets-west.jp ([2405:6586:4480:a10:167:9818:d778:5c14]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-70804893e4bsm624716b3a.184.2024.06.27.22.10.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Jun 2024 22:11:01 -0700 (PDT) From: Hironori KIKUCHI To: linux-kernel@vger.kernel.org Cc: Hironori KIKUCHI , Jagan Teki , Neil Armstrong , Jessica Zhang , Sam Ravnborg , David Airlie , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org Subject: [PATCH v2 1/3] dt-bindings: display: st7701: Add Anbernic RG28XX panel Date: Fri, 28 Jun 2024 14:10:15 +0900 Message-ID: <20240628051019.975172-2-kikuchan98@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240628051019.975172-1-kikuchan98@gmail.com> References: <20240628051019.975172-1-kikuchan98@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The RG28XX panel is a display panel of the Anbernic RG28XX, a handheld gaming device from Anbernic. It is 2.8 inches in size (diagonally) with a resolution of 480x640. This panel is driven by a variant of the ST7701 driver IC internally, confirmed by dumping and analyzing its BSP initialization sequence by using a logic analyzer. It is very similar to the existing densitron,dmt028vghmcmi-1a panel, but differs in some unknown register values, so add a new entry for the panel to distinguish them. Additionally, the panel is connected via SPI instead of MIPI DSI. So add and modify for SPI as well. Signed-off-by: Hironori KIKUCHI --- .../display/panel/sitronix,st7701.yaml | 69 +++++++++++++++++-- 1 file changed, 64 insertions(+), 5 deletions(-) diff --git a/Documentation/devicetree/bindings/display/panel/sitronix,st7701.yaml b/Documentation/devicetree/bindings/display/panel/sitronix,st7701.yaml index b348f5bf0a9..835ea436531 100644 --- a/Documentation/devicetree/bindings/display/panel/sitronix,st7701.yaml +++ b/Documentation/devicetree/bindings/display/panel/sitronix,st7701.yaml @@ -20,21 +20,19 @@ description: | Densitron DMT028VGHMCMI-1A is 480x640, 2-lane MIPI DSI LCD panel which has built-in ST7701 chip. -allOf: - - $ref: panel-common.yaml# - properties: compatible: items: - enum: - anbernic,rg-arc-panel + - anbernic,rg28xx-panel - densitron,dmt028vghmcmi-1a - elida,kd50t048a - techstar,ts8550b - const: sitronix,st7701 reg: - description: DSI virtual channel used by that screen + description: DSI / SPI channel used by that screen maxItems: 1 VCC-supply: @@ -43,6 +41,13 @@ properties: IOVCC-supply: description: I/O system regulator + dc-gpios: + maxItems: 1 + description: + Controller data/command selection (D/CX) in 4-line SPI mode. + If not set, the controller is in 3-line SPI mode. + Disallowed for DSI. + port: true reset-gpios: true rotation: true @@ -57,7 +62,38 @@ required: - port - reset-gpios -additionalProperties: false +allOf: + - $ref: panel-common.yaml# + - if: + properties: + compatible: + contains: + # SPI connected panels + enum: + - anbernic,rg28xx-panel + then: + $ref: /schemas/spi/spi-peripheral-props.yaml + + - if: + properties: + compatible: + not: + contains: + # DSI or SPI without D/CX pin + enum: + - anbernic,rg-arc-panel + - anbernic,rg28xx-panel + - densitron,dmt028vghmcmi-1a + - elida,kd50t048a + - techstar,ts8550b + then: + required: + - dc-gpios + else: + properties: + dc-gpios: false + +unevaluatedProperties: false examples: - | @@ -82,3 +118,26 @@ examples: }; }; }; + - | + #include + + spi { + #address-cells = <1>; + #size-cells = <0>; + + panel@0 { + compatible = "anbernic,rg28xx-panel", "sitronix,st7701"; + reg = <0>; + spi-max-frequency = <3125000>; + VCC-supply = <®_lcd>; + IOVCC-supply = <®_lcd>; + reset-gpios = <&pio 8 14 GPIO_ACTIVE_HIGH>; /* LCD-RST: PI14 */ + backlight = <&backlight>; + + port { + panel_in_rgb: endpoint { + remote-endpoint = <&tcon_lcd0_out_lcd>; + }; + }; + }; + };