// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2016 MediaTek Inc.
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* Author: Ming Hsiu Tsai <minghsiu.tsai@mediatek.com>
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*/
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_platform.h>
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#include <soc/mediatek/smi.h>
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#include "mtk_mdp_comp.h"
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void mtk_mdp_comp_clock_on(struct device *dev, struct mtk_mdp_comp *comp)
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{
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int i, err;
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if (comp->larb_dev) {
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err = mtk_smi_larb_get(comp->larb_dev);
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if (err)
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dev_err(dev,
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"failed to get larb, err %d. type:%d\n",
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err, comp->type);
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}
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for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
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if (IS_ERR(comp->clk[i]))
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continue;
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err = clk_prepare_enable(comp->clk[i]);
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if (err)
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dev_err(dev,
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"failed to enable clock, err %d. type:%d i:%d\n",
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err, comp->type, i);
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}
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}
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void mtk_mdp_comp_clock_off(struct device *dev, struct mtk_mdp_comp *comp)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
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if (IS_ERR(comp->clk[i]))
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continue;
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clk_disable_unprepare(comp->clk[i]);
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}
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if (comp->larb_dev)
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mtk_smi_larb_put(comp->larb_dev);
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}
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int mtk_mdp_comp_init(struct device *dev, struct device_node *node,
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struct mtk_mdp_comp *comp,
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enum mtk_mdp_comp_type comp_type)
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{
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struct device_node *larb_node;
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struct platform_device *larb_pdev;
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int ret;
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int i;
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comp->dev_node = of_node_get(node);
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comp->type = comp_type;
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for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
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comp->clk[i] = of_clk_get(node, i);
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if (IS_ERR(comp->clk[i])) {
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if (PTR_ERR(comp->clk[i]) != -EPROBE_DEFER)
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dev_err(dev, "Failed to get clock\n");
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ret = PTR_ERR(comp->clk[i]);
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goto put_dev;
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}
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/* Only RDMA needs two clocks */
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if (comp->type != MTK_MDP_RDMA)
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break;
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}
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/* Only DMA capable components need the LARB property */
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comp->larb_dev = NULL;
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if (comp->type != MTK_MDP_RDMA &&
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comp->type != MTK_MDP_WDMA &&
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comp->type != MTK_MDP_WROT)
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return 0;
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larb_node = of_parse_phandle(node, "mediatek,larb", 0);
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if (!larb_node) {
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dev_err(dev,
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"Missing mediadek,larb phandle in %pOF node\n", node);
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ret = -EINVAL;
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goto put_dev;
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}
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larb_pdev = of_find_device_by_node(larb_node);
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if (!larb_pdev) {
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dev_warn(dev, "Waiting for larb device %pOF\n", larb_node);
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of_node_put(larb_node);
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ret = -EPROBE_DEFER;
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goto put_dev;
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}
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of_node_put(larb_node);
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comp->larb_dev = &larb_pdev->dev;
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return 0;
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put_dev:
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of_node_put(comp->dev_node);
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return ret;
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}
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void mtk_mdp_comp_deinit(struct device *dev, struct mtk_mdp_comp *comp)
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{
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of_node_put(comp->dev_node);
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}
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