Commit de0818e9 authored by Georgi Djakov's avatar Georgi Djakov
Browse files

Merge branch 'icc-mtk' into icc-next 

MediaTek DVFSRC Bus Bandwidth and Regulator knobs

This series adds support for the MediaTek Dynamic Voltage and Frequency
Scaling Resource Controller (DVFSRC), found on many MediaTek SoCs.

This hardware collects requests from both software and the various remote
processors embededd into the SoC, and decides about a minimum operating
voltage and a minimum DRAM frequency to fulfill those requests, in an
effort to provide the best achievable performance per watt.

Such hardware IP is capable of transparently performing direct register
R/W on all of the DVFSRC-controlled regulators and SoC bandwidth knobs.

Summarizing how the DVFSRC works for Interconnect:

             ICC provider         ICC Nodes
                              ----          ----
             _________       |CPU |   |--- |VPU |
    _____   |         |-----  ----    |     ----
   |     |->|  DRAM   |       ----    |     ----
   |DRAM |->|scheduler|----- |GPU |   |--- |DISP|
   |     |->|  (EMI)  |       ----    |     ----
   |_____|->|_________|---.   -----   |     ----
               /|\         `-|MMSYS|--|--- |VDEC|
                |             -----   |     ----
                |                     |     ----
                | change DRAM freq    |--- |VENC|
             --------                 |     ----
    SMC --> | DVFSRC |                |     ----
             --------                 |--- |IMG |
                                      |     ----
                                      |     ----
                                      |--- |CAM |
                                            ----

* icc-mtk
  dt-bindings: interconnect: Add MediaTek EMI Interconnect bindings
  interconnect: mediatek: Add MediaTek MT8183/8195 EMI Interconnect driver
  interconnect: mediatek: remove unneeded semicolon

Link: https://lore.kernel.org/r/20240610085735.147134-1-angelogioacchino.delregno@collabora.com


Signed-off-by: default avatarGeorgi Djakov <djakov@kernel.org>
parents b14aa62c 9265ea04

Documentation/devicetree/bindings/interconnect/mediatek,mt8183-emi.yaml

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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause

%YAML 1.2

---

$id: http://devicetree.org/schemas/interconnect/mediatek,mt8183-emi.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: MediaTek External Memory Interface (EMI) Interconnect



maintainers:

  - AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>



description: |

  EMI interconnect providers support system bandwidth requirements through

  Dynamic Voltage Frequency Scaling Resource Collector (DVFSRC) hardware.

  The provider is able to communicate with the DVFSRC through Secure Monitor

  Call (SMC).



             ICC provider         ICC Nodes

                              ----          ----

             _________       |CPU |   |--- |VPU |

    _____   |         |-----  ----    |     ----

   |     |->|  DRAM   |       ----    |     ----

   |DRAM |->|scheduler|----- |GPU |   |--- |DISP|

   |     |->|  (EMI)  |       ----    |     ----

   |_____|->|_________|---.   -----   |     ----

               /|\         `-|MMSYS|--|--- |VDEC|

                |             -----   |     ----

                |                     |     ----

                | change DRAM freq    |--- |VENC|

             --------                 |     ----

    SMC --> | DVFSRC |                |     ----

             --------                 |--- |IMG |

                                      |     ----

                                      |     ----

                                      |--- |CAM |

                                            ----



properties:

  compatible:

    enum:

      - mediatek,mt8183-emi

      - mediatek,mt8195-emi



  '#interconnect-cells':

    const: 1



required:

  - compatible

  - '#interconnect-cells'



unevaluatedProperties: false

drivers/interconnect/Kconfig

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@@ -12,6 +12,7 @@ menuconfig INTERCONNECT 
if INTERCONNECT



source "drivers/interconnect/imx/Kconfig"

source "drivers/interconnect/mediatek/Kconfig"

source "drivers/interconnect/qcom/Kconfig"

source "drivers/interconnect/samsung/Kconfig"

drivers/interconnect/Makefile

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@@ -5,6 +5,7 @@ icc-core-objs := core.o bulk.o debugfs-client.o 


obj-$(CONFIG_INTERCONNECT)		+= icc-core.o

obj-$(CONFIG_INTERCONNECT_IMX)		+= imx/

obj-$(CONFIG_INTERCONNECT_MTK)		+= mediatek/

obj-$(CONFIG_INTERCONNECT_QCOM)		+= qcom/

obj-$(CONFIG_INTERCONNECT_SAMSUNG)	+= samsung/

drivers/interconnect/mediatek/Kconfig

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# SPDX-License-Identifier: GPL-2.0-only



config INTERCONNECT_MTK

	bool "MediaTek interconnect drivers"

	depends on ARCH_MEDIATEK || COMPILE_TEST

	help

	  Support for MediaTek's bus interconnect hardware.



config INTERCONNECT_MTK_DVFSRC_EMI

	tristate "MediaTek DVFSRC EMI interconnect driver"

	depends on INTERCONNECT_MTK && MTK_DVFSRC

	help

	  This is a driver for the MediaTek External Memory Interface

	  interconnect on SoCs equipped with the integrated Dynamic

	  Voltage Frequency Scaling Resource Collector (DVFSRC) MCU



config INTERCONNECT_MTK_MT8183

	tristate "MediaTek MT8183 interconnect driver"

	depends on INTERCONNECT_MTK_DVFSRC_EMI

	help

	  This is a driver for the MediaTek bus interconnect on MT8183-based

	  platforms.



config INTERCONNECT_MTK_MT8195

	tristate "MediaTek MT8195 interconnect driver"

	depends on INTERCONNECT_MTK_DVFSRC_EMI

	help

	  This is a driver for the MediaTek bus interconnect on MT8195-based

	  platforms.

drivers/interconnect/mediatek/Makefile

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# SPDX-License-Identifier: GPL-2.0



obj-$(CONFIG_INTERCONNECT_MTK_DVFSRC_EMI) += icc-emi.o

obj-$(CONFIG_INTERCONNECT_MTK_MT8183) += mt8183.o

obj-$(CONFIG_INTERCONNECT_MTK_MT8195) += mt8195.o