tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (c) 2016 MediaTek Inc.
3 * Author: Tiffany Lin <tiffany.lin@mediatek.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15#include <linux/clk.h>
16#include <linux/of_address.h>
17#include <linux/of_platform.h>
18#include <linux/pm_runtime.h>
19#include <soc/mediatek/smi.h>
20
21#include "mtk_vcodec_dec_pm.h"
22#include "mtk_vcodec_util.h"
23#include "mtk_vpu.h"
24
25int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *mtkdev)
26{
27 struct device_node *node;
28 struct platform_device *pdev;
29 struct mtk_vcodec_pm *pm;
30 struct mtk_vcodec_clk *dec_clk;
31 struct mtk_vcodec_clk_info *clk_info;
32 int i = 0, ret = 0;
33
34 pdev = mtkdev->plat_dev;
35 pm = &mtkdev->pm;
36 pm->mtkdev = mtkdev;
37 dec_clk = &pm->vdec_clk;
38 node = of_parse_phandle(pdev->dev.of_node, "mediatek,larb", 0);
39 if (!node) {
40 mtk_v4l2_err("of_parse_phandle mediatek,larb fail!");
41 return -1;
42 }
43
44 pdev = of_find_device_by_node(node);
45 if (WARN_ON(!pdev)) {
46 of_node_put(node);
47 return -1;
48 }
49 pm->larbvdec = &pdev->dev;
50 pdev = mtkdev->plat_dev;
51 pm->dev = &pdev->dev;
52
53 dec_clk->clk_num =
54 of_property_count_strings(pdev->dev.of_node, "clock-names");
55 if (dec_clk->clk_num > 0) {
56 dec_clk->clk_info = devm_kcalloc(&pdev->dev,
57 dec_clk->clk_num, sizeof(*clk_info),
58 GFP_KERNEL);
59 if (!dec_clk->clk_info)
60 return -ENOMEM;
61 } else {
62 mtk_v4l2_err("Failed to get vdec clock count");
63 return -EINVAL;
64 }
65
66 for (i = 0; i < dec_clk->clk_num; i++) {
67 clk_info = &dec_clk->clk_info[i];
68 ret = of_property_read_string_index(pdev->dev.of_node,
69 "clock-names", i, &clk_info->clk_name);
70 if (ret) {
71 mtk_v4l2_err("Failed to get clock name id = %d", i);
72 return ret;
73 }
74 clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
75 clk_info->clk_name);
76 if (IS_ERR(clk_info->vcodec_clk)) {
77 mtk_v4l2_err("devm_clk_get (%d)%s fail", i,
78 clk_info->clk_name);
79 return PTR_ERR(clk_info->vcodec_clk);
80 }
81 }
82
83 pm_runtime_enable(&pdev->dev);
84
85 return ret;
86}
87
88void mtk_vcodec_release_dec_pm(struct mtk_vcodec_dev *dev)
89{
90 pm_runtime_disable(dev->pm.dev);
91}
92
93void mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm)
94{
95 int ret;
96
97 ret = pm_runtime_get_sync(pm->dev);
98 if (ret)
99 mtk_v4l2_err("pm_runtime_get_sync fail %d", ret);
100}
101
102void mtk_vcodec_dec_pw_off(struct mtk_vcodec_pm *pm)
103{
104 int ret;
105
106 ret = pm_runtime_put_sync(pm->dev);
107 if (ret)
108 mtk_v4l2_err("pm_runtime_put_sync fail %d", ret);
109}
110
111void mtk_vcodec_dec_clock_on(struct mtk_vcodec_pm *pm)
112{
113 struct mtk_vcodec_clk *dec_clk = &pm->vdec_clk;
114 int ret, i = 0;
115
116 for (i = 0; i < dec_clk->clk_num; i++) {
117 ret = clk_prepare_enable(dec_clk->clk_info[i].vcodec_clk);
118 if (ret) {
119 mtk_v4l2_err("clk_prepare_enable %d %s fail %d", i,
120 dec_clk->clk_info[i].clk_name, ret);
121 goto error;
122 }
123 }
124
125 ret = mtk_smi_larb_get(pm->larbvdec);
126 if (ret) {
127 mtk_v4l2_err("mtk_smi_larb_get larbvdec fail %d", ret);
128 goto error;
129 }
130 return;
131
132error:
133 for (i -= 1; i >= 0; i--)
134 clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
135}
136
137void mtk_vcodec_dec_clock_off(struct mtk_vcodec_pm *pm)
138{
139 struct mtk_vcodec_clk *dec_clk = &pm->vdec_clk;
140 int i = 0;
141
142 mtk_smi_larb_put(pm->larbvdec);
143 for (i = dec_clk->clk_num - 1; i >= 0; i--)
144 clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
145}