From patchwork Sat Jan 28 14:21:30 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Senna Tschudin X-Patchwork-Id: 9543339 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id AECBC60415 for ; Sat, 28 Jan 2017 14:24:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A094F28319 for ; Sat, 28 Jan 2017 14:24:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 94EE02833A; Sat, 28 Jan 2017 14:24:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id F416E28319 for ; Sat, 28 Jan 2017 14:24:10 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cXTvF-0004gD-Kb; Sat, 28 Jan 2017 14:24:09 +0000 Received: from bhuna.collabora.co.uk ([46.235.227.227]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cXTu6-0003fI-UF for linux-arm-kernel@lists.infradead.org; Sat, 28 Jan 2017 14:23:02 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: peter) with ESMTPSA id A674A2682AD From: Peter Senna Tschudin To: peter.senna@gmail.com, airlied@linux.ie, architt@codeaurora.org, akpm@linux-foundation.org, daniel.vetter@ffwll.ch, davem@davemloft.net, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, enric.balletbo@collabora.com, eballetbo@gmail.com, galak@codeaurora.org, gregkh@linuxfoundation.org, heiko@sntech.de, ijc+devicetree@hellion.org.uk, javier@dowhile0.org, jslaby@suse.cz, kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org, linux@armlinux.org.uk, linux-kernel@vger.kernel.org, linux@roeck-us.net, mark.rutland@arm.com, martin.donnelly@ge.com, martyn.welch@collabora.co.uk, mchehab@osg.samsung.com, pawel.moll@arm.com, peter.senna@collabora.com, p.zabel@pengutronix.de, thierry.reding@gmail.com, rmk+kernel@armlinux.org.uk, robh+dt@kernel.org, shawnguo@kernel.org, tiwai@suse.com, treding@nvidia.com, ykk@rock-chips.com, laurent.pinchart@ideasonboard.com Subject: [PATCH 1/4] Documentation/devicetree/bindings/video/bridge: megachips-stdpxxxx-ge-b850v3-fw Date: Sat, 28 Jan 2017 15:21:30 +0100 Message-Id: <0d72b822a603b729fa9fa1103daa336430cd2d1a.1485611969.git.peter.senna@collabora.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: References: In-Reply-To: References: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170128_062259_480095_0AC3E3CB X-CRM114-Status: GOOD ( 14.96 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fabio Estevam , Rob Herring , Rask Ingemann Lambertsen MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Devicetree binding documentation for the second video output of the GE B850v3: STDP4028-ge-b850v3-fw bridges (LVDS-DP) STDP2690-ge-b850v3-fw bridges (DP-DP++) Added entry for MegaChips at: Documentation/devicetree/bindings/vendor-prefixes.txt Cc: Laurent Pinchart Cc: Martyn Welch Cc: Martin Donnelly Cc: Javier Martinez Canillas Cc: Enric Balletbo i Serra Cc: Philipp Zabel Cc: Rob Herring Cc: Fabio Estevam Signed-off-by: Peter Senna Tschudin --- .../devicetree/bindings/vendor-prefixes.txt | 1 + .../bridge/megachips-stdpxxxx-ge-b850v3-fw.txt | 92 ++++++++++++++++++++++ 2 files changed, 93 insertions(+) create mode 100644 Documentation/devicetree/bindings/video/bridge/megachips-stdpxxxx-ge-b850v3-fw.txt diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index 1ef148d..b4c2f5c 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -175,6 +175,7 @@ maxim Maxim Integrated Products mcube mCube meas Measurement Specialties mediatek MediaTek Inc. +megachips MegaChips melexis Melexis N.V. melfas MELFAS Inc. memsic MEMSIC Inc. diff --git a/Documentation/devicetree/bindings/video/bridge/megachips-stdpxxxx-ge-b850v3-fw.txt b/Documentation/devicetree/bindings/video/bridge/megachips-stdpxxxx-ge-b850v3-fw.txt new file mode 100644 index 0000000..471db27 --- /dev/null +++ b/Documentation/devicetree/bindings/video/bridge/megachips-stdpxxxx-ge-b850v3-fw.txt @@ -0,0 +1,92 @@ +Drivers for the second video output of the GE B850v3: + STDP4028-ge-b850v3-fw bridges (LVDS-DP) + STDP2690-ge-b850v3-fw bridges (DP-DP++) + +The video processing pipeline on the second output on the GE B850v3: + + Host -> LVDS|--(STDP4028)--|DP -> DP|--(STDP2690)--|DP++ -> Video output + +Each bridge has a dedicated flash containing firmware for supporting the custom +design. The result is that, in this design, neither the STDP4028 nor the +STDP2690 behave as the stock bridges would. The compatible strings include the +suffix "-ge-b850v3-fw" to make it clear that the driver is for the bridges with +the firmware specific for the GE B850v3. + +The driver is powerless to control the video processing pipeline, as the two +bridges behaves as a single one. The driver is only needed for telling the host +about EDID / HPD, and for giving the host powers to ack interrupts. + +Required properties: + - compatible : should be "megachips,stdp4028-ge-b850v3-fw" or + "megachips,stdp2690-ge-b850v3-fw". + - reg : should contain the main address which is used to communicate with + the bridge over i2c. + - interrupt-parent : phandle of the interrupt controller that services + interrupts to the device (stdp4028-ge-b850v3-fw) + - interrupts : one interrupt should be described here, as in + <0 IRQ_TYPE_LEVEL_HIGH> (stdp4028-ge-b850v3-fw) + - ports : should describe the video signal connection between the host + and the bridges. + +Example: + +&mux2_i2c2 { + status = "okay"; + clock-frequency = <100000>; + + stdp4028@73 { + compatible = "megachips,stdp4028-ge-b850v3-fw"; + #address-cells = <1>; + #size-cells = <0>; + + reg = <0x73>; + + interrupt-parent = <&gpio2>; + interrupts = <0 IRQ_TYPE_LEVEL_HIGH>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + stdp4028_in: endpoint { + remote-endpoint = <&lvds0_out>; + }; + }; + port@1 { + reg = <1>; + stdp4028_out: endpoint { + remote-endpoint = <&stdp2690_in>; + }; + }; + }; + }; + + stdp2690@72 { + compatible = "megachips,stdp2690-ge-b850v3-fw"; + #address-cells = <1>; + #size-cells = <0>; + + reg = <0x72>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + stdp2690_in: endpoint { + remote-endpoint = <&stdp4028_out>; + }; + }; + + port@1 { + reg = <1>; + stdp2690_out: endpoint { + /* Connector for external display */ + }; + }; + }; + }; +};