mtk_vcodec_enc_pm.c

  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
 14int 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
 61int 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
 72void 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
 81void 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
 97clkerr:
 98	for (i -= 1; i >= 0; i--)
 99		clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk);
100}
101
102void 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}