tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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_enc_pm.h"
14#include "mtk_vcodec_util.h"
15
16int mtk_vcodec_init_enc_pm(struct mtk_vcodec_dev *mtkdev)
17{
18 struct device_node *node;
19 struct platform_device *pdev;
20 struct mtk_vcodec_pm *pm;
21 struct mtk_vcodec_clk *enc_clk;
22 struct mtk_vcodec_clk_info *clk_info;
23 int ret = 0, i = 0;
24 struct device *dev;
25
26 pdev = mtkdev->plat_dev;
27 pm = &mtkdev->pm;
28 memset(pm, 0, sizeof(struct mtk_vcodec_pm));
29 pm->mtkdev = mtkdev;
30 pm->dev = &pdev->dev;
31 dev = &pdev->dev;
32 enc_clk = &pm->venc_clk;
33
34 node = of_parse_phandle(dev->of_node, "mediatek,larb", 0);
35 if (!node) {
36 mtk_v4l2_err("no mediatek,larb found");
37 return -ENODEV;
38 }
39 pdev = of_find_device_by_node(node);
40 of_node_put(node);
41 if (!pdev) {
42 mtk_v4l2_err("no mediatek,larb device found");
43 return -ENODEV;
44 }
45 pm->larbvenc = &pdev->dev;
46 pdev = mtkdev->plat_dev;
47 pm->dev = &pdev->dev;
48
49 enc_clk->clk_num = of_property_count_strings(pdev->dev.of_node,
50 "clock-names");
51 if (enc_clk->clk_num > 0) {
52 enc_clk->clk_info = devm_kcalloc(&pdev->dev,
53 enc_clk->clk_num, sizeof(*clk_info),
54 GFP_KERNEL);
55 if (!enc_clk->clk_info) {
56 ret = -ENOMEM;
57 goto put_larbvenc;
58 }
59 } else {
60 mtk_v4l2_err("Failed to get venc clock count");
61 ret = -EINVAL;
62 goto put_larbvenc;
63 }
64
65 for (i = 0; i < enc_clk->clk_num; i++) {
66 clk_info = &enc_clk->clk_info[i];
67 ret = of_property_read_string_index(pdev->dev.of_node,
68 "clock-names", i, &clk_info->clk_name);
69 if (ret) {
70 mtk_v4l2_err("venc failed to get clk name %d", i);
71 goto put_larbvenc;
72 }
73 clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
74 clk_info->clk_name);
75 if (IS_ERR(clk_info->vcodec_clk)) {
76 mtk_v4l2_err("venc devm_clk_get (%d)%s fail", i,
77 clk_info->clk_name);
78 ret = PTR_ERR(clk_info->vcodec_clk);
79 goto put_larbvenc;
80 }
81 }
82
83 return 0;
84
85put_larbvenc:
86 put_device(pm->larbvenc);
87 return ret;
88}
89
90void mtk_vcodec_release_enc_pm(struct mtk_vcodec_dev *mtkdev)
91{
92 pm_runtime_disable(mtkdev->pm.dev);
93 put_device(mtkdev->pm.larbvenc);
94}
95
96
97void mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm *pm)
98{
99 struct mtk_vcodec_clk *enc_clk = &pm->venc_clk;
100 int ret, i = 0;
101
102 for (i = 0; i < enc_clk->clk_num; i++) {
103 ret = clk_prepare_enable(enc_clk->clk_info[i].vcodec_clk);
104 if (ret) {
105 mtk_v4l2_err("venc clk_prepare_enable %d %s fail %d", i,
106 enc_clk->clk_info[i].clk_name, ret);
107 goto clkerr;
108 }
109 }
110
111 ret = mtk_smi_larb_get(pm->larbvenc);
112 if (ret) {
113 mtk_v4l2_err("mtk_smi_larb_get larb3 fail %d", ret);
114 goto clkerr;
115 }
116 return;
117
118clkerr:
119 for (i -= 1; i >= 0; i--)
120 clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk);
121}
122
123void mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm *pm)
124{
125 struct mtk_vcodec_clk *enc_clk = &pm->venc_clk;
126 int i = 0;
127
128 mtk_smi_larb_put(pm->larbvenc);
129 for (i = enc_clk->clk_num - 1; i >= 0; i--)
130 clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk);
131}