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.h>
9 #include <linux/pm_runtime.h>
10
11 #include "mtk_vcodec_enc_drv.h"
12 #include "mtk_vcodec_enc_pm.h"
13
mtk_vcodec_init_enc_clk(struct mtk_vcodec_enc_dev * mtkdev)14 int mtk_vcodec_init_enc_clk(struct mtk_vcodec_enc_dev *mtkdev)
15 {
16 struct platform_device *pdev;
17 struct mtk_vcodec_pm *pm;
18 struct mtk_vcodec_clk *enc_clk;
19 struct mtk_vcodec_clk_info *clk_info;
20 int ret, i;
21
22 pdev = mtkdev->plat_dev;
23 pm = &mtkdev->pm;
24 memset(pm, 0, sizeof(struct mtk_vcodec_pm));
25 pm->dev = &pdev->dev;
26 enc_clk = &pm->venc_clk;
27
28 enc_clk->clk_num = of_property_count_strings(pdev->dev.of_node,
29 "clock-names");
30 if (enc_clk->clk_num > 0) {
31 enc_clk->clk_info = devm_kcalloc(&pdev->dev,
32 enc_clk->clk_num, sizeof(*clk_info),
33 GFP_KERNEL);
34 if (!enc_clk->clk_info)
35 return -ENOMEM;
36 } else {
37 dev_err(pm->dev, "[MTK VCODEC] Failed to get venc clock count");
38 return -EINVAL;
39 }
40
41 for (i = 0; i < enc_clk->clk_num; i++) {
42 clk_info = &enc_clk->clk_info[i];
43 ret = of_property_read_string_index(pdev->dev.of_node,
44 "clock-names", i, &clk_info->clk_name);
45 if (ret) {
46 dev_err(pm->dev, "[MTK VCODEC] venc failed to get clk name %d", i);
47 return ret;
48 }
49 clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
50 clk_info->clk_name);
51 if (IS_ERR(clk_info->vcodec_clk)) {
52 dev_err(pm->dev, "[MTK VCODEC] venc devm_clk_get (%d)%s fail", i,
53 clk_info->clk_name);
54 return PTR_ERR(clk_info->vcodec_clk);
55 }
56 }
57
58 return 0;
59 }
60
mtk_vcodec_enc_pw_on(struct mtk_vcodec_pm * pm)61 int mtk_vcodec_enc_pw_on(struct mtk_vcodec_pm *pm)
62 {
63 int ret;
64
65 ret = pm_runtime_resume_and_get(pm->dev);
66 if (ret)
67 dev_err(pm->dev, "pm_runtime_resume_and_get fail: %d", ret);
68
69 return ret;
70 }
71
mtk_vcodec_enc_pw_off(struct mtk_vcodec_pm * pm)72 void mtk_vcodec_enc_pw_off(struct mtk_vcodec_pm *pm)
73 {
74 int ret;
75
76 ret = pm_runtime_put(pm->dev);
77 if (ret && ret != -EAGAIN)
78 dev_err(pm->dev, "pm_runtime_put fail %d", ret);
79 }
80
mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm * pm)81 void mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm *pm)
82 {
83 struct mtk_vcodec_clk *enc_clk = &pm->venc_clk;
84 int ret, i = 0;
85
86 for (i = 0; i < enc_clk->clk_num; i++) {
87 ret = clk_prepare_enable(enc_clk->clk_info[i].vcodec_clk);
88 if (ret) {
89 dev_err(pm->dev, "[MTK VCODEC] venc clk_prepare_enable %d %s fail %d", i,
90 enc_clk->clk_info[i].clk_name, ret);
91 goto clkerr;
92 }
93 }
94
95 return;
96
97 clkerr:
98 for (i -= 1; i >= 0; i--)
99 clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk);
100 }
101
mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm * pm)102 void mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm *pm)
103 {
104 struct mtk_vcodec_clk *enc_clk = &pm->venc_clk;
105 int i = 0;
106
107 for (i = enc_clk->clk_num - 1; i >= 0; i--)
108 clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk);
109 }
110