mirror of https://gitee.com/openkylin/linux.git
146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
/*
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* Copyright (c) 2016 MediaTek Inc.
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* Author: Tiffany Lin <tiffany.lin@mediatek.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk.h>
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#include <linux/of_address.h>
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#include <linux/of_platform.h>
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#include <linux/pm_runtime.h>
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#include <soc/mediatek/smi.h>
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#include "mtk_vcodec_dec_pm.h"
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#include "mtk_vcodec_util.h"
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#include "mtk_vpu.h"
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int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *mtkdev)
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{
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struct device_node *node;
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struct platform_device *pdev;
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struct mtk_vcodec_pm *pm;
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struct mtk_vcodec_clk *dec_clk;
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struct mtk_vcodec_clk_info *clk_info;
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int i = 0, ret = 0;
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pdev = mtkdev->plat_dev;
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pm = &mtkdev->pm;
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pm->mtkdev = mtkdev;
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dec_clk = &pm->vdec_clk;
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node = of_parse_phandle(pdev->dev.of_node, "mediatek,larb", 0);
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if (!node) {
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mtk_v4l2_err("of_parse_phandle mediatek,larb fail!");
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return -1;
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}
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pdev = of_find_device_by_node(node);
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of_node_put(node);
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if (WARN_ON(!pdev)) {
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return -1;
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}
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pm->larbvdec = &pdev->dev;
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pdev = mtkdev->plat_dev;
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pm->dev = &pdev->dev;
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dec_clk->clk_num =
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of_property_count_strings(pdev->dev.of_node, "clock-names");
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if (dec_clk->clk_num > 0) {
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dec_clk->clk_info = devm_kcalloc(&pdev->dev,
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dec_clk->clk_num, sizeof(*clk_info),
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GFP_KERNEL);
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if (!dec_clk->clk_info)
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return -ENOMEM;
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} else {
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mtk_v4l2_err("Failed to get vdec clock count");
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return -EINVAL;
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}
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for (i = 0; i < dec_clk->clk_num; i++) {
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clk_info = &dec_clk->clk_info[i];
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ret = of_property_read_string_index(pdev->dev.of_node,
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"clock-names", i, &clk_info->clk_name);
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if (ret) {
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mtk_v4l2_err("Failed to get clock name id = %d", i);
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return ret;
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}
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clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
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clk_info->clk_name);
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if (IS_ERR(clk_info->vcodec_clk)) {
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mtk_v4l2_err("devm_clk_get (%d)%s fail", i,
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clk_info->clk_name);
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return PTR_ERR(clk_info->vcodec_clk);
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}
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}
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pm_runtime_enable(&pdev->dev);
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return ret;
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}
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void mtk_vcodec_release_dec_pm(struct mtk_vcodec_dev *dev)
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{
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pm_runtime_disable(dev->pm.dev);
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}
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void mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm)
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{
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int ret;
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ret = pm_runtime_get_sync(pm->dev);
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if (ret)
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mtk_v4l2_err("pm_runtime_get_sync fail %d", ret);
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}
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void mtk_vcodec_dec_pw_off(struct mtk_vcodec_pm *pm)
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{
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int ret;
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ret = pm_runtime_put_sync(pm->dev);
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if (ret)
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mtk_v4l2_err("pm_runtime_put_sync fail %d", ret);
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}
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void mtk_vcodec_dec_clock_on(struct mtk_vcodec_pm *pm)
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{
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struct mtk_vcodec_clk *dec_clk = &pm->vdec_clk;
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int ret, i = 0;
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for (i = 0; i < dec_clk->clk_num; i++) {
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ret = clk_prepare_enable(dec_clk->clk_info[i].vcodec_clk);
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if (ret) {
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mtk_v4l2_err("clk_prepare_enable %d %s fail %d", i,
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dec_clk->clk_info[i].clk_name, ret);
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goto error;
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}
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}
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ret = mtk_smi_larb_get(pm->larbvdec);
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if (ret) {
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mtk_v4l2_err("mtk_smi_larb_get larbvdec fail %d", ret);
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goto error;
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}
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return;
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error:
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for (i -= 1; i >= 0; i--)
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clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
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}
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void mtk_vcodec_dec_clock_off(struct mtk_vcodec_pm *pm)
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{
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struct mtk_vcodec_clk *dec_clk = &pm->vdec_clk;
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int i = 0;
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mtk_smi_larb_put(pm->larbvdec);
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for (i = dec_clk->clk_num - 1; i >= 0; i--)
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clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
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}
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