1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2016 MediaTek Inc.
4 * Author: Tiffany Lin <tiffany.lin@mediatek.com>
5 */
6
7 #include <linux/clk.h>
8 #include <linux/of_address.h>
9 #include <linux/of_platform.h>
10 #include <linux/pm_runtime.h>
11 #include <soc/mediatek/smi.h>
12
13 #include "mtk_vcodec_dec_pm.h"
14 #include "mtk_vcodec_util.h"
15 #include "mtk_vpu.h"
16
mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev * mtkdev)17 int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *mtkdev)
18 {
19 struct device_node *node;
20 struct platform_device *pdev;
21 struct mtk_vcodec_pm *pm;
22 struct mtk_vcodec_clk *dec_clk;
23 struct mtk_vcodec_clk_info *clk_info;
24 int i = 0, ret = 0;
25
26 pdev = mtkdev->plat_dev;
27 pm = &mtkdev->pm;
28 pm->mtkdev = mtkdev;
29 dec_clk = &pm->vdec_clk;
30 node = of_parse_phandle(pdev->dev.of_node, "mediatek,larb", 0);
31 if (!node) {
32 mtk_v4l2_err("of_parse_phandle mediatek,larb fail!");
33 return -1;
34 }
35
36 pdev = of_find_device_by_node(node);
37 of_node_put(node);
38 if (WARN_ON(!pdev)) {
39 return -1;
40 }
41 pm->larbvdec = &pdev->dev;
42 pdev = mtkdev->plat_dev;
43 pm->dev = &pdev->dev;
44
45 dec_clk->clk_num =
46 of_property_count_strings(pdev->dev.of_node, "clock-names");
47 if (dec_clk->clk_num > 0) {
48 dec_clk->clk_info = devm_kcalloc(&pdev->dev,
49 dec_clk->clk_num, sizeof(*clk_info),
50 GFP_KERNEL);
51 if (!dec_clk->clk_info)
52 return -ENOMEM;
53 } else {
54 mtk_v4l2_err("Failed to get vdec clock count");
55 return -EINVAL;
56 }
57
58 for (i = 0; i < dec_clk->clk_num; i++) {
59 clk_info = &dec_clk->clk_info[i];
60 ret = of_property_read_string_index(pdev->dev.of_node,
61 "clock-names", i, &clk_info->clk_name);
62 if (ret) {
63 mtk_v4l2_err("Failed to get clock name id = %d", i);
64 return ret;
65 }
66 clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
67 clk_info->clk_name);
68 if (IS_ERR(clk_info->vcodec_clk)) {
69 mtk_v4l2_err("devm_clk_get (%d)%s fail", i,
70 clk_info->clk_name);
71 return PTR_ERR(clk_info->vcodec_clk);
72 }
73 }
74
75 pm_runtime_enable(&pdev->dev);
76
77 return ret;
78 }
79
mtk_vcodec_release_dec_pm(struct mtk_vcodec_dev * dev)80 void mtk_vcodec_release_dec_pm(struct mtk_vcodec_dev *dev)
81 {
82 pm_runtime_disable(dev->pm.dev);
83 }
84
mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm * pm)85 void mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm)
86 {
87 int ret;
88
89 ret = pm_runtime_get_sync(pm->dev);
90 if (ret)
91 mtk_v4l2_err("pm_runtime_get_sync fail %d", ret);
92 }
93
mtk_vcodec_dec_pw_off(struct mtk_vcodec_pm * pm)94 void mtk_vcodec_dec_pw_off(struct mtk_vcodec_pm *pm)
95 {
96 int ret;
97
98 ret = pm_runtime_put_sync(pm->dev);
99 if (ret)
100 mtk_v4l2_err("pm_runtime_put_sync fail %d", ret);
101 }
102
mtk_vcodec_dec_clock_on(struct mtk_vcodec_pm * pm)103 void mtk_vcodec_dec_clock_on(struct mtk_vcodec_pm *pm)
104 {
105 struct mtk_vcodec_clk *dec_clk = &pm->vdec_clk;
106 int ret, i = 0;
107
108 for (i = 0; i < dec_clk->clk_num; i++) {
109 ret = clk_prepare_enable(dec_clk->clk_info[i].vcodec_clk);
110 if (ret) {
111 mtk_v4l2_err("clk_prepare_enable %d %s fail %d", i,
112 dec_clk->clk_info[i].clk_name, ret);
113 goto error;
114 }
115 }
116
117 ret = mtk_smi_larb_get(pm->larbvdec);
118 if (ret) {
119 mtk_v4l2_err("mtk_smi_larb_get larbvdec fail %d", ret);
120 goto error;
121 }
122 return;
123
124 error:
125 for (i -= 1; i >= 0; i--)
126 clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
127 }
128
mtk_vcodec_dec_clock_off(struct mtk_vcodec_pm * pm)129 void mtk_vcodec_dec_clock_off(struct mtk_vcodec_pm *pm)
130 {
131 struct mtk_vcodec_clk *dec_clk = &pm->vdec_clk;
132 int i = 0;
133
134 mtk_smi_larb_put(pm->larbvdec);
135 for (i = dec_clk->clk_num - 1; i >= 0; i--)
136 clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
137 }
138
