Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932947AbcCKPnG (ORCPT ); Fri, 11 Mar 2016 10:43:06 -0500 Received: from us01smtprelay-2.synopsys.com ([198.182.47.9]:42084 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932569AbcCKPm6 (ORCPT ); Fri, 11 Mar 2016 10:42:58 -0500 From: Alexey Brodkin To: linux-kernel@vger.kernel.org Cc: linux-snps-arc@lists.infradead.org, Alexey Brodkin , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , David Airlie , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org Subject: [PATCH 2/4 v3] drm: Add DT bindings documentation for ARC PGU display controller Date: Fri, 11 Mar 2016 18:42:37 +0300 Message-Id: <1457710959-9562-3-git-send-email-abrodkin@synopsys.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1457710959-9562-1-git-send-email-abrodkin@synopsys.com> References: <1457710959-9562-1-git-send-email-abrodkin@synopsys.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2727 Lines: 105 This add DT bindings documentation for ARC PGU display controller. Signed-off-by: Alexey Brodkin Cc: Rob Herring Cc: Pawel Moll Cc: Mark Rutland Cc: Ian Campbell Cc: Kumar Gala Cc: David Airlie Cc: dri-devel@lists.freedesktop.org Cc: devicetree@vger.kernel.org Cc: linux-snps-arc@lists.infradead.org --- Changes v2 -> v3: * Reverted back to initial larger version of example with minor fixes (thanks Rob for spotting those). Changes v1 -> v2: * Removed everything except PGU node itself. .../devicetree/bindings/display/snps,arcpgu.txt | 72 ++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/snps,arcpgu.txt diff --git a/Documentation/devicetree/bindings/display/snps,arcpgu.txt b/Documentation/devicetree/bindings/display/snps,arcpgu.txt new file mode 100644 index 0000000..b130924 --- /dev/null +++ b/Documentation/devicetree/bindings/display/snps,arcpgu.txt @@ -0,0 +1,72 @@ +ARC PGU + +This is a display controller found on several development boards produced +by Synopsys. The ARC PGU is an RGB streamer that reads the data from a +framebuffer and sends it to a single digital encoder (usually HDMI). + +Required properties: + - compatible: "snps,arcpgu" + - reg: Physical base address and length of the controller's registers. + - clocks: A list of phandle + clock-specifier pairs, one for each + entry in 'clock-names'. + - clock-names: A list of clock names. For ARC PGU it should contain: + - "pxlclk" for the clock feeding the output PLL of the controller. + - encoder-slave: Phandle of encoder chip. + +Required sub-nodes: + - port: The PGU connection to an encoder chip. + +Example: + +/ { + ... + + pgu@XXXXXXXX { + compatible = "snps,arcpgu"; + reg = <0xXXXXXXXX 0x400>; + clocks = <&clock_node>; + clock-names = "pxlclk"; + encoder-slave = <&encoder_node>; + + port { + pgu_output: endpoint { + remote-endpoint = <&hdmi_enc_input>; + }; + }; + }; + + /* HDMI encoder on I2C bus */ + i2c@XXXXXXXX { + compatible = "..."; + + encoder_node:encoder_node@0xXX{ + compatible="..."; + + ports { + port@0 { + reg = <0>; + hdmi_enc_input:endpoint { + remote-endpoint = <&pgu_output>; + }; + }; + + port@1 { + reg = <1>; + hdmi_enc_output:endpoint { + remote-endpoint = <&hdmi_connector_in>; + }; + }; + }; + }; + } + + hdmi0: connector { + compatible = "hdmi-connector"; + + port { + hdmi_connector_in: endpoint { + remote-endpoint = <&hdmi_enc_output>; + }; + }; + }; +}; -- 2.5.0