linux-kernel - Re: [PATCHv16 1/3] ARM:dt-bindings:display Intel FPGA Video and Image Processing Suite

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Message-ID: <9695f3e1-92ab-23ce-5922-71fbb7d8149f@kernel.org>
Date:   Fri, 7 Jun 2019 10:21:49 -0500
From:   Dinh Nguyen <dinguyen@...nel.org>
To:     "Hean-Loong, Ong" <hean.loong.ong@...el.com>,
        Rob Herring <robh+dt@...nel.org>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Randy Dunlap <rdunlap@...radead.org>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org, chin.liang.see@...el.com
Subject: Re: [PATCHv16 1/3] ARM:dt-bindings:display Intel FPGA Video and Image
 Processing Suite

Hi Hean-Loong:

Please format your commit message like this:

<Commit message>

Reviewed-by: Rob Herring <robh@...nel.org>
Signed-off-by: Ong, Hean Loong <hean.loong.ong@...el.com>
---
V15:
v14:


The version history needs go after the ---

Dinh

On 6/7/19 9:30 AM, Hean-Loong, Ong wrote:
> From: "Ong, Hean Loong" <hean.loong.ong@...el.com>
> 
> Device tree binding for Intel FPGA Video and Image Processing Suite.
> The bindings would set the max width, max height,
> bits per pixel and memory port width.
> The device tree binding only supports the Intel
> Arria10 devkit and its variants. Vendor name retained as altr.
> 
> Reviewed-by: Rob Herring <robh@...nel.org>
> 
> V15:
> Reviewed
> 
> V14:
> No Change
> 
> V13:
> No change
> 
> V12:
> Wrap comments and fix commit message
> 
> V11:
> No change
> 
> V10:
> No change
> 
> V9:
> Remove Display port node
> 
> V8:
> *Add port to Display port decoder
> 
> V7:
> *Fix OF graph for better description
> *Add description for encoder
> 
> V6:
> *Description have not describe DT device in general
> 
> V5:
> *remove bindings for bits per symbol as it has only one value which is 8
> 
> V4:
> *fix properties that does not describe the values
> 
> V3:
> *OF graph not in accordance to graph.txt
> 
> V2:
> *Remove Linux driver description
> 
> V1:
> *Missing vendor prefix
> 
> Signed-off-by: Ong, Hean Loong <hean.loong.ong@...el.com>
> ---
>  .../bindings/display/altr,vip-fb2.txt         | 63 +++++++++++++++++++
>  1 file changed, 63 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/altr,vip-fb2.txt
> 
> diff --git a/Documentation/devicetree/bindings/display/altr,vip-fb2.txt b/Documentation/devicetree/bindings/display/altr,vip-fb2.txt
> new file mode 100644
> index 000000000000..89a3b9e166a8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/altr,vip-fb2.txt
> @@ -0,0 +1,63 @@
> +Intel Video and Image Processing(VIP) Frame Buffer II bindings
> +
> +Supported hardware: Intel FPGA SoC Arria10 and above with display port IP
> +
> +The Video Frame Buffer II in Video Image Processing (VIP) suite is an IP core
> +that interfaces between system memory and Avalon-ST video ports. The IP core
> +can be configured to support the memory reader (from memory to Avalon-ST)
> +and/or memory writer (from Avalon-ST to memory) interfaces.
> +
> +More information the FPGA video IP component can be acquired from
> +https://www.altera.com/content/dam/altera-www/global/en_US/pdfs\
> +/literature/ug/ug_vip.pdf
> +
> +DT-Bindings:
> +=============
> +Required properties:
> +----------------------------
> +- compatible: "altr,vip-frame-buffer-2.0"
> +- reg: Physical base address and length of the framebuffer controller's
> +	registers.
> +- altr,max-width: The maximum width of the framebuffer in pixels.
> +- altr,max-height: The maximum height of the framebuffer in pixels.
> +- altr,mem-port-width = the bus width of the avalon master port
> +	on the frame reader
> +
> +Optional sub-nodes:
> +- ports: The connection to the encoder
> +
> +Connections between the Frame Buffer II and other video IP cores in the system
> +are modelled using the OF graph DT bindings. The Frame Buffer II node has up
> +to two OF graph ports. When the memory writer interface is enabled, port 0
> +maps to the Avalon-ST Input (din) port. When the memory reader interface is
> +enabled, port 1 maps to the Avalon-ST Output (dout) port.
> +
> +The encoder is built into the FPGA HW design and therefore would not
> +be accessible from the DDR.
> +
> +		Port 0				Port1
> +---------------------------------------------------------
> +ARRIA10 AVALON_ST (DIN)		AVALON_ST (DOUT)
> +
> +Required Properties Example:
> +----------------------------
> +
> +framebuffer@...000280 {
> +		compatible = "altr,vip-frame-buffer-2.0";
> +		reg = <0x00000001 0x00000280 0x00000040>;
> +		altr,max-width = <1280>;
> +		altr,max-height = <720>;
> +		altr,mem-port-width = <128>;
> +
> +		ports {
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +
> +			port@1 {
> +				reg = <1>;
> +					fb_output: endpoint {
> +						remote-endpoint = <&dp_encoder_input>;
> +					};
> +			};
> +		};
> +};
>