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AKaTC024CCz1DzboHPGuVuC3c+0fcgo4jdZP6QhzBL5opjuu4jVML5AWouAkQx4e/AQP1qoj X-Received: by 10.194.203.5 with SMTP id km5mr32922299wjc.230.1480520635298; Wed, 30 Nov 2016 07:43:55 -0800 (PST) Received: from localhost.localdomain ([90.63.244.31]) by smtp.gmail.com with ESMTPSA id c133sm8590295wme.12.2016.11.30.07.43.54 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 30 Nov 2016 07:43:54 -0800 (PST) From: Neil Armstrong To: airlied@linux.ie, khilman@baylibre.com, carlo@caione.org Subject: [PATCH v2 3/4] dt-bindings: display: add Amlogic Meson DRM Bindings Date: Wed, 30 Nov 2016 16:43:44 +0100 Message-Id: <1480520625-13269-4-git-send-email-narmstrong@baylibre.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1480520625-13269-1-git-send-email-narmstrong@baylibre.com> References: <1480520625-13269-1-git-send-email-narmstrong@baylibre.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161130_074417_870631_F7BAF308 X-CRM114-Status: GOOD ( 14.38 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Xing.Xu@amlogic.com, victor.wan@amlogic.com, Neil Armstrong , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, laurent.pinchart@ideasonboard.com, daniel@ffwll.ch, jerry.cao@amlogic.com, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+patchwork-linux-amlogic=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Neil Armstrong Reviewed-by: Laurent Pinchart --- .../bindings/display/meson/meson-drm.txt | 101 +++++++++++++++++++++ 1 file changed, 101 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/meson/meson-drm.txt diff --git a/Documentation/devicetree/bindings/display/meson/meson-drm.txt b/Documentation/devicetree/bindings/display/meson/meson-drm.txt new file mode 100644 index 0000000..e52869a --- /dev/null +++ b/Documentation/devicetree/bindings/display/meson/meson-drm.txt @@ -0,0 +1,101 @@ +Amlogic Meson Display Controller +================================ + +The Amlogic Meson Display controller is composed of several components +that are going to be documented below: + +DMC|---------------VPU (Video Processing Unit)----------------|------HHI------| + | vd1 _______ _____________ _________________ | | +D |-------| |----| | | | | HDMI PLL | +D | vd2 | VIU | | Video Post | | Video Encoders |<---|-----VCLK | +R |-------| |----| Processing | | | | | + | osd2 | | | |---| Enci ----------|----|-----VDAC------| +R |-------| CSC |----| Scalers | | Encp ----------|----|----HDMI-TX----| +A | osd1 | | | Blenders | | Encl ----------|----|---------------| +M |-------|______|----|____________| |________________| | | +___|__________________________________________________________|_______________| + + +VIU: Video Input Unit +--------------------- + +The Video Input Unit is in charge of the pixel scanout from the DDR memory. +It fetches the frames addresses, stride and parameters from the "Canvas" memory. +This part is also in charge of the CSC (Colorspace Conversion). +It can handle 2 OSD Planes and 2 Video Planes. + +VPP: Video Post Processing +-------------------------- + +The Video Post Processing is in charge of the scaling and blending of the +various planes into a single pixel stream. +There is a special "pre-blending" used by the video planes with a dedicated +scaler and a "post-blending" to merge with the OSD Planes. +The OSD planes also have a dedicated scaler for one of the OSD. + +VENC: Video Encoders +-------------------- + +The VENC is composed of the multiple pixel encoders : + - ENCI : Interlace Video encoder for CVBS and Interlace HDMI + - ENCP : Progressive Video Encoder for HDMI + - ENCL : LCD LVDS Encoder +The VENC Unit gets a Pixel Clocks (VCLK) from a dedicated HDMI PLL and clock +tree and provides the scanout clock to the VPP and VIU. +The ENCI is connected to a single VDAC for Composite Output. +The ENCI and ENCP are connected to an on-chip HDMI Transceiver. + +Device Tree Bindings: +--------------------- + +VPU: Video Processing Unit +-------------------------- + +Required properties: +- compatible: value should be different for each SoC family as : + - GXBB (S905) : "amlogic,meson-gxbb-vpu" + - GXL (S905X, S905D) : "amlogic,meson-gxl-vpu" + - GXM (S912) : "amlogic,meson-gxm-vpu" + followed by the common "amlogic,meson-gx-vpu" +- reg: base address and size of he following memory-mapped regions : + - vpu + - hhi + - dmc +- reg-names: should contain the names of the previous memory regions +- interrupts: should contain the VENC Vsync interrupt number + +- ports: A ports node with endpoint definitions as defined in + Documentation/devicetree/bindings/media/video-interfaces.txt. + The first port should be connected to a CVBS connector endpoint if available. + +Example: + +tv: connector { + compatible = "composite-video-connector"; + label = "cvbs"; + + port { + tv_connector_in: endpoint { + remote-endpoint = <&cvbs_vdac_out>; + }; + }; +}; + +vpu: vpu@d0100000 { + compatible = "amlogic,meson-gxbb-vpu"; + reg = <0x0 0xd0100000 0x0 0x100000>, + <0x0 0xc883c000 0x0 0x1000>, + <0x0 0xc8838000 0x0 0x1000>; + reg-names = "vpu", "hhi", "dmc"; + interrupts = ; + #address-cells = <1>; + #size-cells = <0>; + + /* CVBS VDAC output port */ + port@0 { + cvbs_vdac_out: endpoint { + reg = <0>; + remote-endpoint = <&tv_connector_in>; + }; + }; +};