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
mtk_vcodec_init_enc_pm(struct mtk_vcodec_dev * mtkdev)16 int 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
47 node = of_parse_phandle(dev->of_node, "mediatek,larb", 1);
48 if (!node) {
49 mtk_v4l2_err("no mediatek,larb found");
50 ret = -ENODEV;
51 goto put_larbvenc;
52 }
53
54 pdev = of_find_device_by_node(node);
55 of_node_put(node);
56 if (!pdev) {
57 mtk_v4l2_err("no mediatek,larb device found");
58 ret = -ENODEV;
59 goto put_larbvenc;
60 }
61
62 pm->larbvenclt = &pdev->dev;
63 pdev = mtkdev->plat_dev;
64 pm->dev = &pdev->dev;
65
66 enc_clk->clk_num = of_property_count_strings(pdev->dev.of_node,
67 "clock-names");
68 if (enc_clk->clk_num > 0) {
69 enc_clk->clk_info = devm_kcalloc(&pdev->dev,
70 enc_clk->clk_num, sizeof(*clk_info),
71 GFP_KERNEL);
72 if (!enc_clk->clk_info) {
73 ret = -ENOMEM;
74 goto put_larbvenclt;
75 }
76 } else {
77 mtk_v4l2_err("Failed to get venc clock count");
78 ret = -EINVAL;
79 goto put_larbvenclt;
80 }
81
82 for (i = 0; i < enc_clk->clk_num; i++) {
83 clk_info = &enc_clk->clk_info[i];
84 ret = of_property_read_string_index(pdev->dev.of_node,
85 "clock-names", i, &clk_info->clk_name);
86 if (ret) {
87 mtk_v4l2_err("venc failed to get clk name %d", i);
88 goto put_larbvenclt;
89 }
90 clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
91 clk_info->clk_name);
92 if (IS_ERR(clk_info->vcodec_clk)) {
93 mtk_v4l2_err("venc devm_clk_get (%d)%s fail", i,
94 clk_info->clk_name);
95 ret = PTR_ERR(clk_info->vcodec_clk);
96 goto put_larbvenclt;
97 }
98 }
99
100 return 0;
101
102 put_larbvenclt:
103 put_device(pm->larbvenclt);
104 put_larbvenc:
105 put_device(pm->larbvenc);
106 return ret;
107 }
108
mtk_vcodec_release_enc_pm(struct mtk_vcodec_dev * mtkdev)109 void mtk_vcodec_release_enc_pm(struct mtk_vcodec_dev *mtkdev)
110 {
111 }
112
113
mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm * pm)114 void mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm *pm)
115 {
116 struct mtk_vcodec_clk *enc_clk = &pm->venc_clk;
117 int ret, i = 0;
118
119 for (i = 0; i < enc_clk->clk_num; i++) {
120 ret = clk_prepare_enable(enc_clk->clk_info[i].vcodec_clk);
121 if (ret) {
122 mtk_v4l2_err("venc clk_prepare_enable %d %s fail %d", i,
123 enc_clk->clk_info[i].clk_name, ret);
124 goto clkerr;
125 }
126 }
127
128 ret = mtk_smi_larb_get(pm->larbvenc);
129 if (ret) {
130 mtk_v4l2_err("mtk_smi_larb_get larb3 fail %d", ret);
131 goto larbvencerr;
132 }
133 ret = mtk_smi_larb_get(pm->larbvenclt);
134 if (ret) {
135 mtk_v4l2_err("mtk_smi_larb_get larb4 fail %d", ret);
136 goto larbvenclterr;
137 }
138 return;
139
140 larbvenclterr:
141 mtk_smi_larb_put(pm->larbvenc);
142 larbvencerr:
143 clkerr:
144 for (i -= 1; i >= 0; i--)
145 clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk);
146 }
147
mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm * pm)148 void mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm *pm)
149 {
150 struct mtk_vcodec_clk *enc_clk = &pm->venc_clk;
151 int i = 0;
152
153 mtk_smi_larb_put(pm->larbvenc);
154 mtk_smi_larb_put(pm->larbvenclt);
155 for (i = enc_clk->clk_num - 1; i >= 0; i--)
156 clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk);
157 }
158