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AngeloGioacchino Del RegnoGeorgi Djakov
AngeloGioacchino Del Regno
authored and
Georgi Djakov
committed
interconnect: mediatek: Add support for MediaTek MT8196 EMI ICC
Add a new driver with data to register the External Memory Interface (EMI) Interconnect on the MediaTek MT8196 Chromebook SoC. Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com> Link: https://lore.kernel.org/r/20251124-mt8196-dvfsrc-v2-11-d9c1334db9f3@collabora.com Signed-off-by: Georgi Djakov <djakov@kernel.org>
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‎drivers/interconnect/mediatek/Kconfig‎

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@@ -27,3 +27,10 @@ config INTERCONNECT_MTK_MT8195
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help
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This is a driver for the MediaTek bus interconnect on MT8195-based
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platforms.
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config INTERCONNECT_MTK_MT8196
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tristate "MediaTek MT8196 interconnect driver"
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depends on INTERCONNECT_MTK_DVFSRC_EMI
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help
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This is a driver for the MediaTek bus interconnect on MT8196-based
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platforms.

‎drivers/interconnect/mediatek/Makefile‎

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@@ -3,3 +3,4 @@
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obj-$(CONFIG_INTERCONNECT_MTK_DVFSRC_EMI) += icc-emi.o
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obj-$(CONFIG_INTERCONNECT_MTK_MT8183) += mt8183.o
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obj-$(CONFIG_INTERCONNECT_MTK_MT8195) += mt8195.o
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obj-$(CONFIG_INTERCONNECT_MTK_MT8195) += mt8196.o

‎drivers/interconnect/mediatek/mt8196.c‎

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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2025 Collabora Ltd.
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* AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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*/
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#include <linux/device.h>
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#include <linux/interconnect.h>
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#include <linux/interconnect-provider.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <dt-bindings/interconnect/mediatek,mt8196.h>
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#include "icc-emi.h"
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static struct mtk_icc_node ddr_emi = {
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.name = "ddr-emi",
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.id = SLAVE_DDR_EMI,
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.ep = 1,
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};
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static struct mtk_icc_node mcusys = {
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.name = "mcusys",
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.id = MASTER_MCUSYS,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node mcu_port0 = {
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.name = "mcu-port0",
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.id = MASTER_MCU_0,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node mcu_port1 = {
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.name = "mcu-port1",
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.id = MASTER_MCU_1,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node mcu_port2 = {
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.name = "mcu-port2",
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.id = MASTER_MCU_2,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node mcu_port3 = {
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.name = "mcu-port3",
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.id = MASTER_MCU_3,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node mcu_port4 = {
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.name = "mcu-port4",
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.id = MASTER_MCU_4,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node gpu = {
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.name = "gpu",
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.id = MASTER_GPUSYS,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node mmsys = {
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.name = "mmsys",
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.id = MASTER_MMSYS,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node mm_vpu = {
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.name = "mm-vpu",
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.id = MASTER_MM_VPU,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_MMSYS }
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};
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static struct mtk_icc_node mm_disp = {
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.name = "mm-disp",
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.id = MASTER_MM_DISP,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_MMSYS }
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};
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static struct mtk_icc_node mm_vdec = {
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.name = "mm-vdec",
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.id = MASTER_MM_VDEC,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_MMSYS }
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};
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static struct mtk_icc_node mm_venc = {
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.name = "mm-venc",
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.id = MASTER_MM_VENC,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_MMSYS }
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};
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static struct mtk_icc_node mm_cam = {
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.name = "mm-cam",
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.id = MASTER_MM_CAM,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_MMSYS }
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};
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static struct mtk_icc_node mm_img = {
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.name = "mm-img",
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.id = MASTER_MM_IMG,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_MMSYS }
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};
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static struct mtk_icc_node mm_mdp = {
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.name = "mm-mdp",
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.id = MASTER_MM_MDP,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_MMSYS }
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};
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static struct mtk_icc_node vpusys = {
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.name = "vpusys",
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.id = MASTER_VPUSYS,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node vpu_port0 = {
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.name = "vpu-port0",
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.id = MASTER_VPU_0,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_VPUSYS }
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};
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static struct mtk_icc_node vpu_port1 = {
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.name = "vpu-port1",
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.id = MASTER_VPU_1,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_VPUSYS }
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};
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static struct mtk_icc_node mdlasys = {
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.name = "mdlasys",
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.id = MASTER_MDLASYS,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node mdla_port0 = {
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.name = "mdla-port0",
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.id = MASTER_MDLA_0,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_MDLASYS }
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};
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static struct mtk_icc_node ufs = {
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.name = "ufs",
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.id = MASTER_UFS,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node pcie = {
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.name = "pcie",
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.id = MASTER_PCIE,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node usb = {
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.name = "usb",
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.id = MASTER_USB,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node wifi = {
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.name = "wifi",
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.id = MASTER_WIFI,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node bt = {
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.name = "bt",
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.id = MASTER_BT,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node netsys = {
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.name = "netsys",
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.id = MASTER_NETSYS,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node dbgif = {
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.name = "dbgif",
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.id = MASTER_DBGIF,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_DDR_EMI }
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};
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static struct mtk_icc_node hrt_ddr_emi = {
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.name = "hrt-ddr-emi",
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.id = SLAVE_HRT_DDR_EMI,
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.ep = 2,
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};
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static struct mtk_icc_node hrt_mmsys = {
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.name = "hrt-mmsys",
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.id = MASTER_HRT_MMSYS,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_HRT_DDR_EMI }
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};
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static struct mtk_icc_node hrt_mm_disp = {
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.name = "hrt-mm-disp",
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.id = MASTER_HRT_MM_DISP,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_HRT_MMSYS }
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};
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static struct mtk_icc_node hrt_mm_vdec = {
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.name = "hrt-mm-vdec",
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.id = MASTER_HRT_MM_VDEC,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_HRT_MMSYS }
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};
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static struct mtk_icc_node hrt_mm_venc = {
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.name = "hrt-mm-venc",
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.id = MASTER_HRT_MM_VENC,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_HRT_MMSYS }
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};
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static struct mtk_icc_node hrt_mm_cam = {
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.name = "hrt-mm-cam",
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.id = MASTER_HRT_MM_CAM,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_HRT_MMSYS }
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};
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static struct mtk_icc_node hrt_mm_img = {
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.name = "hrt-mm-img",
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.id = MASTER_HRT_MM_IMG,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_HRT_MMSYS }
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};
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static struct mtk_icc_node hrt_mm_mdp = {
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.name = "hrt-mm-mdp",
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.id = MASTER_HRT_MM_MDP,
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.ep = 0,
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.num_links = 1,
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.links = { MASTER_HRT_MMSYS }
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};
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static struct mtk_icc_node hrt_adsp = {
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.name = "hrt-adsp",
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.id = MASTER_HRT_ADSP,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_HRT_DDR_EMI }
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};
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static struct mtk_icc_node hrt_dbgif = {
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.name = "hrt-dbgif",
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.id = MASTER_HRT_DBGIF,
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.ep = 0,
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.num_links = 1,
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.links = { SLAVE_HRT_DDR_EMI }
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};
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static struct mtk_icc_node *mt8196_emi_icc_nodes[] = {
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[SLAVE_DDR_EMI] = &ddr_emi,
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[MASTER_MCUSYS] = &mcusys,
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[MASTER_MCU_0] = &mcu_port0,
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[MASTER_MCU_1] = &mcu_port1,
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[MASTER_MCU_2] = &mcu_port2,
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[MASTER_MCU_3] = &mcu_port3,
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[MASTER_MCU_4] = &mcu_port4,
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[MASTER_GPUSYS] = &gpu,
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[MASTER_MMSYS] = &mmsys,
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[MASTER_MM_VPU] = &mm_vpu,
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[MASTER_MM_DISP] = &mm_disp,
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[MASTER_MM_VDEC] = &mm_vdec,
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[MASTER_MM_VENC] = &mm_venc,
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[MASTER_MM_CAM] = &mm_cam,
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[MASTER_MM_IMG] = &mm_img,
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[MASTER_MM_MDP] = &mm_mdp,
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[MASTER_VPUSYS] = &vpusys,
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[MASTER_VPU_0] = &vpu_port0,
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[MASTER_VPU_1] = &vpu_port1,
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[MASTER_MDLASYS] = &mdlasys,
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[MASTER_MDLA_0] = &mdla_port0,
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[MASTER_UFS] = &ufs,
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[MASTER_PCIE] = &pcie,
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[MASTER_USB] = &usb,
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[MASTER_WIFI] = &wifi,
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[MASTER_BT] = &bt,
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[MASTER_NETSYS] = &netsys,
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[MASTER_DBGIF] = &dbgif,
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[SLAVE_HRT_DDR_EMI] = &hrt_ddr_emi,
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[MASTER_HRT_MMSYS] = &hrt_mmsys,
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[MASTER_HRT_MM_DISP] = &hrt_mm_disp,
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[MASTER_HRT_MM_VDEC] = &hrt_mm_vdec,
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[MASTER_HRT_MM_VENC] = &hrt_mm_venc,
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[MASTER_HRT_MM_CAM] = &hrt_mm_cam,
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[MASTER_HRT_MM_IMG] = &hrt_mm_img,
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[MASTER_HRT_MM_MDP] = &hrt_mm_mdp,
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[MASTER_HRT_ADSP] = &hrt_adsp,
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[MASTER_HRT_DBGIF] = &hrt_dbgif
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};
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static struct mtk_icc_desc mt8196_emi_icc = {
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.nodes = mt8196_emi_icc_nodes,
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.num_nodes = ARRAY_SIZE(mt8196_emi_icc_nodes),
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};
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static const struct of_device_id mtk_mt8196_emi_icc_of_match[] = {
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{ .compatible = "mediatek,mt8196-emi", .data = &mt8196_emi_icc },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, mtk_mt8196_emi_icc_of_match);
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static struct platform_driver mtk_emi_icc_mt8196_driver = {
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.driver = {
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.name = "emi-icc-mt8196",
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.of_match_table = mtk_mt8196_emi_icc_of_match,
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.sync_state = icc_sync_state,
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},
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.probe = mtk_emi_icc_probe,
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.remove = mtk_emi_icc_remove,
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};
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module_platform_driver(mtk_emi_icc_mt8196_driver);
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MODULE_AUTHOR("AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>");
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MODULE_DESCRIPTION("MediaTek MT8196 EMI ICC driver");
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MODULE_LICENSE("GPL");

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