289 lines
7.5 KiB
C
289 lines
7.5 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2019 MediaTek Inc.
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*/
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#include <dt-bindings/interconnect/mtk,mt6779-emi.h>
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#include <dt-bindings/interconnect/mtk,mt6761-emi.h>
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#include <linux/device.h>
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#include <linux/interconnect-provider.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/soc/mediatek/mtk_dvfsrc.h>
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enum mtk_icc_name {
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SLAVE_DDR_EMI,
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MASTER_MCUSYS,
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MASTER_GPUSYS,
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MASTER_MMSYS,
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MASTER_MM_VPU,
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MASTER_MM_DISP,
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MASTER_MM_VDEC,
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MASTER_MM_VENC,
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MASTER_MM_CAM,
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MASTER_MM_IMG,
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MASTER_MM_MDP,
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MASTER_VPUSYS,
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MASTER_VPU_PORT_0,
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MASTER_VPU_PORT_1,
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MASTER_MDLASYS,
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MASTER_MDLA_PORT_0,
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MASTER_DEBUGSYS,
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};
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#define MAX_LINKS 6
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/**
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* struct mtk_icc_node - Mediatek specific interconnect nodes
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* @name: the node name used in debugfs
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* @links: an array of nodes where we can go next while traversing
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* @id: a unique node identifier
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* @num_links: the total number of @links
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* @buswidth: width of the interconnect between a node and the bus
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* @sum_avg: current sum aggregate value of all avg bw [kBps] requests
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* @max_peak: current max aggregate value of all peak bw [kBps] requests
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*/
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struct mtk_icc_node {
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unsigned char *name;
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bool ep;
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u16 id;
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u16 links[MAX_LINKS];
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u16 num_links;
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u16 buswidth;
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u64 sum_avg;
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u64 sum_peak;
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};
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struct mtk_icc_desc {
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struct mtk_icc_node **nodes;
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size_t num_nodes;
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};
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#define DEFINE_MNODE(_name, _id, _buswidth, _ep, _numlinks, ...) \
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static struct mtk_icc_node _name = { \
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.name = #_name, \
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.id = _id, \
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.buswidth = _buswidth, \
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.ep = _ep, \
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.num_links = ARRAY_SIZE(((int[]){ __VA_ARGS__ })), \
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.links = { __VA_ARGS__ }, \
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}
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DEFINE_MNODE(ddr_emi, SLAVE_DDR_EMI, 1024, 1, 0, 0);
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DEFINE_MNODE(mcusys, MASTER_MCUSYS, 256, 0, 1, SLAVE_DDR_EMI);
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DEFINE_MNODE(gpu, MASTER_GPUSYS, 256, 0, 1, SLAVE_DDR_EMI);
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DEFINE_MNODE(mmsys, MASTER_MMSYS, 256, 0, 1, SLAVE_DDR_EMI);
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DEFINE_MNODE(mm_vpu, MASTER_MM_VPU, 128, 0, 1, MASTER_MMSYS);
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DEFINE_MNODE(mm_disp, MASTER_MM_DISP, 128, 0, 1, MASTER_MMSYS);
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DEFINE_MNODE(mm_vdec, MASTER_MM_VDEC, 128, 0, 1, MASTER_MMSYS);
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DEFINE_MNODE(mm_venc, MASTER_MM_VENC, 128, 0, 1, MASTER_MMSYS);
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DEFINE_MNODE(mm_cam, MASTER_MM_CAM, 128, 0, 1, MASTER_MMSYS);
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DEFINE_MNODE(mm_img, MASTER_MM_IMG, 128, 0, 1, MASTER_MMSYS);
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DEFINE_MNODE(mm_mdp, MASTER_MM_MDP, 128, 0, 1, MASTER_MMSYS);
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DEFINE_MNODE(vpusys, MASTER_VPUSYS, 256, 0, 1, SLAVE_DDR_EMI);
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DEFINE_MNODE(vpu_port_0, MASTER_VPU_PORT_0, 128, 0, 1, MASTER_VPUSYS);
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DEFINE_MNODE(vpu_port_1, MASTER_VPU_PORT_1, 128, 0, 1, MASTER_VPUSYS);
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DEFINE_MNODE(mdlasys, MASTER_MDLASYS, 256, 0, 1, SLAVE_DDR_EMI);
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DEFINE_MNODE(mdla_port_0, MASTER_MDLA_PORT_0, 256, 0, 1, MASTER_MDLASYS);
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DEFINE_MNODE(debugsys, MASTER_DEBUGSYS, 256, 0, 1, SLAVE_DDR_EMI);
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static struct mtk_icc_node *mt6779_icc_nodes[] = {
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[MT6779_SLAVE_DDR_EMI] = &ddr_emi,
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[MT6779_MASTER_MCUSYS] = &mcusys,
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[MT6779_MASTER_GPUSYS] = &gpu,
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[MT6779_MASTER_MMSYS] = &mmsys,
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[MT6779_MASTER_MM_VPU] = &mm_vpu,
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[MT6779_MASTER_MM_DISP] = &mm_disp,
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[MT6779_MASTER_MM_VDEC] = &mm_vdec,
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[MT6779_MASTER_MM_VENC] = &mm_venc,
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[MT6779_MASTER_MM_CAM] = &mm_cam,
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[MT6779_MASTER_MM_IMG] = &mm_img,
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[MT6779_MASTER_MM_MDP] = &mm_mdp,
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[MT6779_MASTER_VPUSYS] = &vpusys,
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[MT6779_MASTER_VPU_0] = &vpu_port_0,
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[MT6779_MASTER_VPU_1] = &vpu_port_1,
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[MT6779_MASTER_MDLASYS] = &mdlasys,
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[MT6779_MASTER_MDLA_0] = &mdla_port_0,
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[MT6779_MASTER_DEBUGSYS] = &debugsys,
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};
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static struct mtk_icc_desc mt6779_icc = {
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.nodes = mt6779_icc_nodes,
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.num_nodes = ARRAY_SIZE(mt6779_icc_nodes),
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};
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static struct mtk_icc_node *mt6761_icc_nodes[] = {
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[MT6761_SLAVE_DDR_EMI] = &ddr_emi,
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[MT6761_MASTER_MCUSYS] = &mcusys,
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[MT6761_MASTER_GPUSYS] = &gpu,
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[MT6761_MASTER_MMSYS] = &mmsys,
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[MT6761_MASTER_MM_VPU] = &mm_vpu,
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[MT6761_MASTER_MM_DISP] = &mm_disp,
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[MT6761_MASTER_MM_VDEC] = &mm_vdec,
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[MT6761_MASTER_MM_VENC] = &mm_venc,
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[MT6761_MASTER_MM_CAM] = &mm_cam,
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[MT6761_MASTER_MM_IMG] = &mm_img,
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[MT6761_MASTER_MM_MDP] = &mm_mdp,
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[MT6761_MASTER_DEBUGSYS] = &debugsys,
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};
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static struct mtk_icc_desc mt6761_icc = {
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.nodes = mt6761_icc_nodes,
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.num_nodes = ARRAY_SIZE(mt6761_icc_nodes),
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};
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static int emi_icc_aggregate(struct icc_node *node, u32 avg_bw,
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u32 peak_bw, u32 *agg_avg, u32 *agg_peak)
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{
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struct mtk_icc_node *in;
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in = node->data;
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*agg_avg += avg_bw;
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*agg_peak += peak_bw;
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in->sum_avg = *agg_avg;
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in->sum_peak = *agg_peak;
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return 0;
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}
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static int emi_icc_set(struct icc_node *src, struct icc_node *dst)
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{
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int ret = 0;
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struct mtk_icc_node *node;
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node = dst->data;
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if (node->ep) {
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pr_debug("sum_avg (%llu), max_peak (%llu)\n",
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node->sum_avg, node->sum_peak);
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mtk_dvfsrc_send_request(src->provider->dev->parent,
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MTK_DVFSRC_CMD_BW_REQUEST,
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node->sum_avg);
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mtk_dvfsrc_send_request(src->provider->dev->parent,
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MTK_DVFSRC_CMD_HRTBW_REQUEST,
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node->sum_peak);
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}
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return ret;
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}
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static int emi_icc_probe(struct platform_device *pdev)
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{
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int ret;
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const struct mtk_icc_desc *desc;
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struct icc_node *node;
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struct icc_onecell_data *data;
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struct icc_provider *provider;
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struct mtk_icc_node **mnodes;
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size_t num_nodes, i, j;
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desc = of_device_get_match_data(&pdev->dev);
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if (!desc)
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return -EINVAL;
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mnodes = desc->nodes;
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num_nodes = desc->num_nodes;
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provider = devm_kzalloc(&pdev->dev, sizeof(*provider), GFP_KERNEL);
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if (!provider)
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return -ENOMEM;
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data = devm_kcalloc(&pdev->dev, num_nodes, sizeof(*node), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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provider->dev = &pdev->dev;
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provider->set = emi_icc_set;
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provider->aggregate = emi_icc_aggregate;
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provider->xlate = of_icc_xlate_onecell;
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INIT_LIST_HEAD(&provider->nodes);
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provider->data = data;
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ret = icc_provider_add(provider);
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if (ret) {
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dev_err(&pdev->dev, "error adding interconnect provider\n");
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return ret;
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}
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for (i = 0; i < num_nodes; i++) {
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node = icc_node_create(mnodes[i]->id);
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if (IS_ERR(node)) {
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ret = PTR_ERR(node);
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goto err;
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}
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node->name = mnodes[i]->name;
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node->data = mnodes[i];
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icc_node_add(node, provider);
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dev_dbg(&pdev->dev, "registered node %s, num link: %d\n",
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mnodes[i]->name, mnodes[i]->num_links);
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/* populate links */
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for (j = 0; j < mnodes[i]->num_links; j++)
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icc_link_create(node, mnodes[i]->links[j]);
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data->nodes[i] = node;
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}
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data->num_nodes = num_nodes;
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platform_set_drvdata(pdev, provider);
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return 0;
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err:
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list_for_each_entry(node, &provider->nodes, node_list) {
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icc_node_del(node);
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icc_node_destroy(node->id);
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}
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icc_provider_del(provider);
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return ret;
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}
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static int emi_icc_remove(struct platform_device *pdev)
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{
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struct icc_provider *provider = platform_get_drvdata(pdev);
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struct icc_node *n;
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list_for_each_entry(n, &provider->nodes, node_list) {
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icc_node_del(n);
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icc_node_destroy(n->id);
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}
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return icc_provider_del(provider);
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}
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static const struct of_device_id emi_icc_of_match[] = {
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{ .compatible = "mediatek,dvfsrc-mt6779-emi", .data = &mt6779_icc },
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{ .compatible = "mediatek,dvfsrc-mt6761-emi", .data = &mt6761_icc },
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{ },
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};
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MODULE_DEVICE_TABLE(of, emi_icc_of_match);
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static struct platform_driver emi_icc_driver = {
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.probe = emi_icc_probe,
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.remove = emi_icc_remove,
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.driver = {
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.name = "mediatek-dvfsrc-emi",
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.of_match_table = emi_icc_of_match,
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},
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};
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static int __init mtk_emi_icc_init(void)
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{
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return platform_driver_register(&emi_icc_driver);
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}
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subsys_initcall(mtk_emi_icc_init);
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static void __exit mtk_emi_icc_exit(void)
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{
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platform_driver_unregister(&emi_icc_driver);
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}
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module_exit(mtk_emi_icc_exit);
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MODULE_AUTHOR("Henry Chen <henryc.chen@mediatek.com>");
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MODULE_LICENSE("GPL v2");
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