1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2016 MediaTek Inc.
4 * Author: Ming Hsiu Tsai <minghsiu.tsai@mediatek.com>
8 #include <linux/device.h>
10 #include <linux/of_address.h>
11 #include <linux/of_platform.h>
12 #include <soc/mediatek/smi.h>
14 #include "mtk_mdp_comp.h"
17 static const char * const mtk_mdp_comp_stem[MTK_MDP_COMP_TYPE_MAX] = {
24 struct mtk_mdp_comp_match {
25 enum mtk_mdp_comp_type type;
29 static const struct mtk_mdp_comp_match mtk_mdp_matches[MTK_MDP_COMP_ID_MAX] = {
40 int mtk_mdp_comp_get_id(struct device *dev, struct device_node *node,
41 enum mtk_mdp_comp_type comp_type)
43 int id = of_alias_get_id(node, mtk_mdp_comp_stem[comp_type]);
46 for (i = 0; i < ARRAY_SIZE(mtk_mdp_matches); i++) {
47 if (comp_type == mtk_mdp_matches[i].type &&
48 id == mtk_mdp_matches[i].alias_id)
52 dev_err(dev, "Failed to get id. type: %d, id: %d\n", comp_type, id);
57 void mtk_mdp_comp_clock_on(struct device *dev, struct mtk_mdp_comp *comp)
62 err = mtk_smi_larb_get(comp->larb_dev);
65 "failed to get larb, err %d. type:%d id:%d\n",
66 err, comp->type, comp->id);
69 for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
70 if (IS_ERR(comp->clk[i]))
72 err = clk_prepare_enable(comp->clk[i]);
75 "failed to enable clock, err %d. type:%d id:%d i:%d\n",
76 err, comp->type, comp->id, i);
80 void mtk_mdp_comp_clock_off(struct device *dev, struct mtk_mdp_comp *comp)
84 for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
85 if (IS_ERR(comp->clk[i]))
87 clk_disable_unprepare(comp->clk[i]);
91 mtk_smi_larb_put(comp->larb_dev);
94 int mtk_mdp_comp_init(struct device *dev, struct device_node *node,
95 struct mtk_mdp_comp *comp, enum mtk_mdp_comp_id comp_id)
97 struct device_node *larb_node;
98 struct platform_device *larb_pdev;
101 if (comp_id < 0 || comp_id >= MTK_MDP_COMP_ID_MAX) {
102 dev_err(dev, "Invalid comp_id %d\n", comp_id);
106 comp->dev_node = of_node_get(node);
108 comp->type = mtk_mdp_matches[comp_id].type;
109 comp->regs = of_iomap(node, 0);
111 for (i = 0; i < ARRAY_SIZE(comp->clk); i++) {
112 comp->clk[i] = of_clk_get(node, i);
114 /* Only RDMA needs two clocks */
115 if (comp->type != MTK_MDP_RDMA)
119 /* Only DMA capable components need the LARB property */
120 comp->larb_dev = NULL;
121 if (comp->type != MTK_MDP_RDMA &&
122 comp->type != MTK_MDP_WDMA &&
123 comp->type != MTK_MDP_WROT)
126 larb_node = of_parse_phandle(node, "mediatek,larb", 0);
129 "Missing mediadek,larb phandle in %pOF node\n", node);
133 larb_pdev = of_find_device_by_node(larb_node);
135 dev_warn(dev, "Waiting for larb device %pOF\n", larb_node);
136 of_node_put(larb_node);
137 return -EPROBE_DEFER;
139 of_node_put(larb_node);
141 comp->larb_dev = &larb_pdev->dev;
146 void mtk_mdp_comp_deinit(struct device *dev, struct mtk_mdp_comp *comp)
148 of_node_put(comp->dev_node);