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
12 #include "mtk_vcodec_enc_pm.h"
13 #include "mtk_vcodec_util.h"
14
mtk_vcodec_init_enc_clk(struct mtk_vcodec_dev * mtkdev)15 int mtk_vcodec_init_enc_clk(struct mtk_vcodec_dev *mtkdev)
16 {
17 struct platform_device *pdev;
18 struct mtk_vcodec_pm *pm;
19 struct mtk_vcodec_clk *enc_clk;
20 struct mtk_vcodec_clk_info *clk_info;
21 int ret, i;
22
23 pdev = mtkdev->plat_dev;
24 pm = &mtkdev->pm;
25 memset(pm, 0, sizeof(struct mtk_vcodec_pm));
26 pm->dev = &pdev->dev;
27 enc_clk = &pm->venc_clk;
28
29 enc_clk->clk_num = of_property_count_strings(pdev->dev.of_node,
30 "clock-names");
31 if (enc_clk->clk_num > 0) {
32 enc_clk->clk_info = devm_kcalloc(&pdev->dev,
33 enc_clk->clk_num, sizeof(*clk_info),
34 GFP_KERNEL);
35 if (!enc_clk->clk_info)
36 return -ENOMEM;
37 } else {
38 mtk_v4l2_err("Failed to get venc clock count");
39 return -EINVAL;
40 }
41
42 for (i = 0; i < enc_clk->clk_num; i++) {
43 clk_info = &enc_clk->clk_info[i];
44 ret = of_property_read_string_index(pdev->dev.of_node,
45 "clock-names", i, &clk_info->clk_name);
46 if (ret) {
47 mtk_v4l2_err("venc failed to get clk name %d", i);
48 return ret;
49 }
50 clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
51 clk_info->clk_name);
52 if (IS_ERR(clk_info->vcodec_clk)) {
53 mtk_v4l2_err("venc devm_clk_get (%d)%s fail", i,
54 clk_info->clk_name);
55 return PTR_ERR(clk_info->vcodec_clk);
56 }
57 }
58
59 return 0;
60 }
61
mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm * pm)62 void mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm *pm)
63 {
64 struct mtk_vcodec_clk *enc_clk = &pm->venc_clk;
65 int ret, i = 0;
66
67 for (i = 0; i < enc_clk->clk_num; i++) {
68 ret = clk_prepare_enable(enc_clk->clk_info[i].vcodec_clk);
69 if (ret) {
70 mtk_v4l2_err("venc clk_prepare_enable %d %s fail %d", i,
71 enc_clk->clk_info[i].clk_name, ret);
72 goto clkerr;
73 }
74 }
75
76 return;
77
78 clkerr:
79 for (i -= 1; i >= 0; i--)
80 clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk);
81 }
82
mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm * pm)83 void mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm *pm)
84 {
85 struct mtk_vcodec_clk *enc_clk = &pm->venc_clk;
86 int i = 0;
87
88 for (i = enc_clk->clk_num - 1; i >= 0; i--)
89 clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk);
90 }
91