1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2016 MediaTek Inc.
4 * Author: Tiffany Lin <tiffany.lin@mediatek.com>
8 #include <linux/of_address.h>
9 #include <linux/of_platform.h>
10 #include <linux/pm_runtime.h>
12 #include "mtk_vcodec_enc_pm.h"
13 #include "mtk_vcodec_util.h"
15 int mtk_vcodec_init_enc_clk(struct mtk_vcodec_dev *mtkdev)
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;
23 pdev = mtkdev->plat_dev;
25 memset(pm, 0, sizeof(struct mtk_vcodec_pm));
27 enc_clk = &pm->venc_clk;
29 enc_clk->clk_num = of_property_count_strings(pdev->dev.of_node,
31 if (enc_clk->clk_num > 0) {
32 enc_clk->clk_info = devm_kcalloc(&pdev->dev,
33 enc_clk->clk_num, sizeof(*clk_info),
35 if (!enc_clk->clk_info)
38 mtk_v4l2_err("Failed to get venc clock count");
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);
47 mtk_v4l2_err("venc failed to get clk name %d", i);
50 clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
52 if (IS_ERR(clk_info->vcodec_clk)) {
53 mtk_v4l2_err("venc devm_clk_get (%d)%s fail", i,
55 return PTR_ERR(clk_info->vcodec_clk);
62 void mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm *pm)
64 struct mtk_vcodec_clk *enc_clk = &pm->venc_clk;
67 for (i = 0; i < enc_clk->clk_num; i++) {
68 ret = clk_prepare_enable(enc_clk->clk_info[i].vcodec_clk);
70 mtk_v4l2_err("venc clk_prepare_enable %d %s fail %d", i,
71 enc_clk->clk_info[i].clk_name, ret);
79 for (i -= 1; i >= 0; i--)
80 clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk);
83 void mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm *pm)
85 struct mtk_vcodec_clk *enc_clk = &pm->venc_clk;
88 for (i = enc_clk->clk_num - 1; i >= 0; i--)
89 clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk);