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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2016 MediaTek Inc.
* Author: Tiffany Lin <tiffany.lin@mediatek.com>
*/
#include <linux/clk.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/pm_runtime.h>
#include <soc/mediatek/smi.h>
#include "mtk_vcodec_dec_pm.h"
#include "mtk_vcodec_util.h"
int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *mtkdev)
{
struct device_node *node;
struct platform_device *pdev;
struct mtk_vcodec_pm *pm;
struct mtk_vcodec_clk *dec_clk;
struct mtk_vcodec_clk_info *clk_info;
int i = 0, ret = 0;
pdev = mtkdev->plat_dev;
pm = &mtkdev->pm;
pm->mtkdev = mtkdev;
dec_clk = &pm->vdec_clk;
node = of_parse_phandle(pdev->dev.of_node, "mediatek,larb", 0);
if (!node) {
mtk_v4l2_err("of_parse_phandle mediatek,larb fail!");
return -1;
}
pdev = of_find_device_by_node(node);
of_node_put(node);
if (WARN_ON(!pdev)) {
return -1;
}
pm->larbvdec = &pdev->dev;
pdev = mtkdev->plat_dev;
pm->dev = &pdev->dev;
dec_clk->clk_num =
of_property_count_strings(pdev->dev.of_node, "clock-names");
if (dec_clk->clk_num > 0) {
dec_clk->clk_info = devm_kcalloc(&pdev->dev,
dec_clk->clk_num, sizeof(*clk_info),
GFP_KERNEL);
if (!dec_clk->clk_info) {
ret = -ENOMEM;
goto put_device;
}
} else {
mtk_v4l2_err("Failed to get vdec clock count");
ret = -EINVAL;
goto put_device;
}
for (i = 0; i < dec_clk->clk_num; i++) {
clk_info = &dec_clk->clk_info[i];
ret = of_property_read_string_index(pdev->dev.of_node,
"clock-names", i, &clk_info->clk_name);
if (ret) {
mtk_v4l2_err("Failed to get clock name id = %d", i);
goto put_device;
}
clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
clk_info->clk_name);
if (IS_ERR(clk_info->vcodec_clk)) {
mtk_v4l2_err("devm_clk_get (%d)%s fail", i,
clk_info->clk_name);
ret = PTR_ERR(clk_info->vcodec_clk);
goto put_device;
}
}
pm_runtime_enable(&pdev->dev);
return 0;
put_device:
put_device(pm->larbvdec);
return ret;
}
void mtk_vcodec_release_dec_pm(struct mtk_vcodec_dev *dev)
{
pm_runtime_disable(dev->pm.dev);
put_device(dev->pm.larbvdec);
}
int mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm)
{
int ret;
ret = pm_runtime_resume_and_get(pm->dev);
if (ret)
mtk_v4l2_err("pm_runtime_resume_and_get fail %d", ret);
return ret;
}
void mtk_vcodec_dec_pw_off(struct mtk_vcodec_pm *pm)
{
int ret;
ret = pm_runtime_put_sync(pm->dev);
if (ret)
mtk_v4l2_err("pm_runtime_put_sync fail %d", ret);
}
void mtk_vcodec_dec_clock_on(struct mtk_vcodec_pm *pm)
{
struct mtk_vcodec_clk *dec_clk = &pm->vdec_clk;
int ret, i = 0;
for (i = 0; i < dec_clk->clk_num; i++) {
ret = clk_prepare_enable(dec_clk->clk_info[i].vcodec_clk);
if (ret) {
mtk_v4l2_err("clk_prepare_enable %d %s fail %d", i,
dec_clk->clk_info[i].clk_name, ret);
goto error;
}
}
ret = mtk_smi_larb_get(pm->larbvdec);
if (ret) {
mtk_v4l2_err("mtk_smi_larb_get larbvdec fail %d", ret);
goto error;
}
return;
error:
for (i -= 1; i >= 0; i--)
clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
}
void mtk_vcodec_dec_clock_off(struct mtk_vcodec_pm *pm)
{
struct mtk_vcodec_clk *dec_clk = &pm->vdec_clk;
int i = 0;
mtk_smi_larb_put(pm->larbvdec);
for (i = dec_clk->clk_num - 1; i >= 0; i--)
clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
}
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