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Commit 658f1491 authored by Krishna Manikandan's avatar Krishna Manikandan
Browse files

dt-bindings: add documentation for sde-limit 

Add documentation for sde-limit node which is
used to represent the max limit for different
properties for different usecases.

Change-Id: I0ff47a9868daf9c0307b0c147bf7bdbeffbff330
parent c18075f0

bindings/display/msm/sde.txt

+38 −0
Original line number Diff line number Diff line
@@ -466,6 +466,15 @@ Optional properties: 
				ordering block

				0: lower priority pipe has to be on the left for a given pair of pipes.

				1: priority have to be explicitly configured for a given pair of pipes.

- qcom,sde-limits:		A node that lists the limits for different properties. This node

				can have multiple child nodes. Each child node represents a

				specific usecase limit. The usecase can be defined for properties like

				sspp linewidth, bw limit etc.

				e.g. qcom,sde-limits

				-- qcom,sde-limit-name: name of the usecase

				-- qcom,sde-limit-cases: different usecases to be considered

				-- qcom,sde-limit-ids: respective ids for the above usecases

				-- qcom,sde-limit-values: usecase and value for different combinations



Bus Scaling Subnodes:

- qcom,sde-reg-bus:		Property to provide Bus scaling for register access for
@@ -802,6 +811,35 @@ Example: 
        qcom,sde-dspp-vlut = <0x0 0x00010000>;

    };



    qcom,sde-limits {

	qcom,sde-linewidth-limits{

		qcom,sde-limit-cases = "vig", "dma", "scaling", "inline_rot";

		qcom,sde-limit-ids= <0x1 0x2 0x4 0x8>;

		/* the qcom,sde-limit-values property consist of two values:

		one for the usecase and the other for the value. The usecase can be

		any combination of the values mentioned in qcom,sde-limit-ids.

		For eg: <0x5 2560> means usecase is 0x5 and value is 2560.

		0x5 = (0x1 | 0x4) = vig + scaling. Thus the linewidth for usecase

		vig + scaling  = 2560 */

		qcom,sde-limit-values = <0x1 4096>,

					<0x5 2560>,

					<0xd 1088>,

					<0x2 4096>;

	};

       qcom,sde-bw-limits{

		qcom,sde-limit-cases = "per_pipe", "total_bw", "vfe_on", "cwb_on";

		qcom,sde-limit-ids = <0x1 0x2 0x4 0x8>;

		qcom,sde-limit-values = <0x1 2600000>,

					<0x9 2600000>,

					<0x5 2600000>,

					<0xd 2600000>,

					<0x2 5800000>,

					<0xa 5500000>,

					<0x6 4400000>,

					<0xe 3900000>;

	};

    };



    qcom,sde-mixer-blocks {

        qcom,sde-mixer-gc = <0x3c0 0x00010000>;

    };