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Commit 62254073 authored by Alok Chauhan's avatar Alok Chauhan
Browse files

ARM: dts: msm: Add static rules to throttle CPU and GPU for msm8939 



Apps CPU & GPU may have significant bandwidth consumption spikes
for short duration of time. Though their average bandwidth
consumption is accounted for, while deciding on DDR and
bus frequencies, then CPU & GPU traffic need to be shaped to
reduce peaks.

Rules to limit CPU & GPU traffic peaks at BIMC.

Change-Id: I76d284c7f77ed3598725ea98726212b36ca66605
Signed-off-by: default avatarAlok Chauhan <alokc@codeaurora.org>
Signed-off-by: default avatarSana Venkat Raju <c_vsana@codeaurora.org>
Signed-off-by: default avatarAlok Chauhan <alokc@codeaurora.org>
parent 19c9d762

arch/arm/boot/dts/qcom/msm8939-bus.dtsi

+69 −0
Original line number Diff line number Diff line
@@ -11,8 +11,71 @@ 
 */



#include <dt-bindings/msm/msm-bus-ids.h>

#include <dt-bindings/msm/msm-bus-rule-ops.h>



&soc {

	static-rules {

		compatible = "qcom,msm-bus-static-bw-rules";



		rule0 {

			qcom,src-nodes = <&mas_apss>;

			qcom,src-field = <FLD_IB>;

			qcom,src-op = <OP_LE>;

			qcom,thresh = <2668800>;

			qcom,mode = <THROTTLE_ON>;

			qcom,dest-node = <&mas_apss>;

			qcom,dest-bw = <600000>;

		};



		rule1 {

			qcom,src-nodes = <&mas_apss>;

			qcom,src-field = <FLD_IB>;

			qcom,src-op = <OP_LE>;

			qcom,thresh = <5337600>;

			qcom,mode = <THROTTLE_ON>;

			qcom,dest-node = <&mas_apss>;

			qcom,dest-bw = <1200000>;

		};



		rule2 {

			qcom,src-nodes = <&mas_apss>;

			qcom,src-field = <FLD_IB>;

			qcom,src-op = <OP_GT>;

			qcom,thresh = <5337600>;

			qcom,mode = <THROTTLE_OFF>;

			qcom,dest-node = <&mas_apss>;

		};



		rule3 {

			qcom,src-nodes = <&mas_gfx>;

			qcom,src-field = <FLD_IB>;

			qcom,src-op = <OP_LE>;

			qcom,thresh = <2668800>;

			qcom,mode = <THROTTLE_ON>;

			qcom,dest-node = <&mas_gfx>;

			qcom,dest-bw = <600000>;

		};



		rule4 {

			qcom,src-nodes = <&mas_gfx>;

			qcom,src-field = <FLD_IB>;

			qcom,src-op = <OP_LE>;

			qcom,thresh = <5337600>;

			qcom,mode = <THROTTLE_ON>;

			qcom,dest-node = <&mas_gfx>;

			qcom,dest-bw = <1200000>;

		};



		rule5 {

			qcom,src-nodes = <&mas_gfx>;

			qcom,src-field = <FLD_IB>;

			qcom,src-op = <OP_GT>;

			qcom,thresh = <5337600>;

			qcom,mode = <THROTTLE_OFF>;

			qcom,dest-node = <&mas_gfx>;

		};

	};



	ad_hoc_bus: ad-hoc-bus@580000 {

		compatible = "qcom,msm-bus-device";

		reg = <0x580000 0x14080>,
@@ -377,6 +440,9 @@ 
			qcom,prio-lvl = <0>;

			qcom,prio-rd = <0>;

			qcom,prio-wr = <0>;

			qcom,ws = <10000>;

			qcom,gp = <5000>;

			qcom,thmp = <50>;

			qcom,buswidth = <16>;

		};
@@ -406,6 +472,9 @@ 
			qcom,prio-rd = <0>;

			qcom,prio-wr = <0>;

			qcom,buswidth = <16>;

			qcom,ws = <10000>;

			qcom,gp = <5000>;

			qcom,thmp = <50>;

		};



		bimc_snoc_mas: bimc-snoc-mas {