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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/interrupt.h>
#include <linux/of.h>
#include <linux/pm_runtime.h>
#include "mtk_vcodec_dec_hw.h"
#include "mtk_vcodec_dec_pm.h"
int mtk_vcodec_init_dec_clk(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;
dec_clk = &pm->vdec_clk;
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)
return -ENOMEM;
} else {
dev_err(&pdev->dev, "Failed to get vdec clock count");
return -EINVAL;
}
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) {
dev_err(&pdev->dev, "Failed to get clock name id = %d", i);
return ret;
}
clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
clk_info->clk_name);
if (IS_ERR(clk_info->vcodec_clk)) {
dev_err(&pdev->dev, "devm_clk_get (%d)%s fail", i, clk_info->clk_name);
return PTR_ERR(clk_info->vcodec_clk);
}
}
return 0;
}
EXPORT_SYMBOL_GPL(mtk_vcodec_init_dec_clk);
static int mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm)
{
int ret;
ret = pm_runtime_resume_and_get(pm->dev);
if (ret)
dev_err(pm->dev, "pm_runtime_resume_and_get fail %d", ret);
return ret;
}
static void mtk_vcodec_dec_pw_off(struct mtk_vcodec_pm *pm)
{
int ret;
ret = pm_runtime_put(pm->dev);
if (ret && ret != -EAGAIN)
dev_err(pm->dev, "pm_runtime_put fail %d", ret);
}
static void mtk_vcodec_dec_clock_on(struct mtk_vcodec_pm *pm)
{
struct mtk_vcodec_clk *dec_clk;
int ret, i;
dec_clk = &pm->vdec_clk;
for (i = 0; i < dec_clk->clk_num; i++) {
ret = clk_prepare_enable(dec_clk->clk_info[i].vcodec_clk);
if (ret) {
dev_err(pm->dev, "clk_prepare_enable %d %s fail %d", i,
dec_clk->clk_info[i].clk_name, ret);
goto error;
}
}
return;
error:
for (i -= 1; i >= 0; i--)
clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
}
static void mtk_vcodec_dec_clock_off(struct mtk_vcodec_pm *pm)
{
struct mtk_vcodec_clk *dec_clk;
int i;
dec_clk = &pm->vdec_clk;
for (i = dec_clk->clk_num - 1; i >= 0; i--)
clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
}
static void mtk_vcodec_dec_enable_irq(struct mtk_vcodec_dec_dev *vdec_dev, int hw_idx)
{
struct mtk_vdec_hw_dev *subdev_dev;
if (!test_bit(hw_idx, vdec_dev->subdev_bitmap))
return;
if (vdec_dev->vdec_pdata->is_subdev_supported) {
subdev_dev = mtk_vcodec_get_hw_dev(vdec_dev, hw_idx);
if (subdev_dev)
enable_irq(subdev_dev->dec_irq);
else
dev_err(&vdec_dev->plat_dev->dev, "Failed to get hw dev\n");
} else {
enable_irq(vdec_dev->dec_irq);
}
}
static void mtk_vcodec_dec_disable_irq(struct mtk_vcodec_dec_dev *vdec_dev, int hw_idx)
{
struct mtk_vdec_hw_dev *subdev_dev;
if (!test_bit(hw_idx, vdec_dev->subdev_bitmap))
return;
if (vdec_dev->vdec_pdata->is_subdev_supported) {
subdev_dev = mtk_vcodec_get_hw_dev(vdec_dev, hw_idx);
if (subdev_dev)
disable_irq(subdev_dev->dec_irq);
else
dev_err(&vdec_dev->plat_dev->dev, "Failed to get hw dev\n");
} else {
disable_irq(vdec_dev->dec_irq);
}
}
static void mtk_vcodec_load_racing_info(struct mtk_vcodec_dec_ctx *ctx)
{
void __iomem *vdec_racing_addr;
int j;
mutex_lock(&ctx->dev->dec_racing_info_mutex);
if (atomic_inc_return(&ctx->dev->dec_active_cnt) == 1) {
vdec_racing_addr = ctx->dev->reg_base[VDEC_MISC] + 0x100;
for (j = 0; j < 132; j++)
writel(ctx->dev->vdec_racing_info[j], vdec_racing_addr + j * 4);
}
mutex_unlock(&ctx->dev->dec_racing_info_mutex);
}
static void mtk_vcodec_record_racing_info(struct mtk_vcodec_dec_ctx *ctx)
{
void __iomem *vdec_racing_addr;
int j;
mutex_lock(&ctx->dev->dec_racing_info_mutex);
if (atomic_dec_and_test(&ctx->dev->dec_active_cnt)) {
vdec_racing_addr = ctx->dev->reg_base[VDEC_MISC] + 0x100;
for (j = 0; j < 132; j++)
ctx->dev->vdec_racing_info[j] = readl(vdec_racing_addr + j * 4);
}
mutex_unlock(&ctx->dev->dec_racing_info_mutex);
}
static struct mtk_vcodec_pm *mtk_vcodec_dec_get_pm(struct mtk_vcodec_dec_dev *vdec_dev,
int hw_idx)
{
struct mtk_vdec_hw_dev *subdev_dev;
if (!test_bit(hw_idx, vdec_dev->subdev_bitmap))
return NULL;
if (vdec_dev->vdec_pdata->is_subdev_supported) {
subdev_dev = mtk_vcodec_get_hw_dev(vdec_dev, hw_idx);
if (subdev_dev)
return &subdev_dev->pm;
dev_err(&vdec_dev->plat_dev->dev, "Failed to get hw dev\n");
return NULL;
}
return &vdec_dev->pm;
}
static void mtk_vcodec_dec_child_dev_on(struct mtk_vcodec_dec_dev *vdec_dev,
int hw_idx)
{
struct mtk_vcodec_pm *pm;
pm = mtk_vcodec_dec_get_pm(vdec_dev, hw_idx);
if (pm) {
mtk_vcodec_dec_pw_on(pm);
mtk_vcodec_dec_clock_on(pm);
}
if (hw_idx == MTK_VDEC_LAT0) {
pm = mtk_vcodec_dec_get_pm(vdec_dev, MTK_VDEC_LAT_SOC);
if (pm) {
mtk_vcodec_dec_pw_on(pm);
mtk_vcodec_dec_clock_on(pm);
}
}
}
static void mtk_vcodec_dec_child_dev_off(struct mtk_vcodec_dec_dev *vdec_dev,
int hw_idx)
{
struct mtk_vcodec_pm *pm;
pm = mtk_vcodec_dec_get_pm(vdec_dev, hw_idx);
if (pm) {
mtk_vcodec_dec_clock_off(pm);
mtk_vcodec_dec_pw_off(pm);
}
if (hw_idx == MTK_VDEC_LAT0) {
pm = mtk_vcodec_dec_get_pm(vdec_dev, MTK_VDEC_LAT_SOC);
if (pm) {
mtk_vcodec_dec_clock_off(pm);
mtk_vcodec_dec_pw_off(pm);
}
}
}
void mtk_vcodec_dec_enable_hardware(struct mtk_vcodec_dec_ctx *ctx, int hw_idx)
{
mutex_lock(&ctx->dev->dec_mutex[hw_idx]);
if (IS_VDEC_LAT_ARCH(ctx->dev->vdec_pdata->hw_arch) &&
hw_idx == MTK_VDEC_CORE)
mtk_vcodec_dec_child_dev_on(ctx->dev, MTK_VDEC_LAT0);
mtk_vcodec_dec_child_dev_on(ctx->dev, hw_idx);
mtk_vcodec_dec_enable_irq(ctx->dev, hw_idx);
if (IS_VDEC_INNER_RACING(ctx->dev->dec_capability))
mtk_vcodec_load_racing_info(ctx);
}
EXPORT_SYMBOL_GPL(mtk_vcodec_dec_enable_hardware);
void mtk_vcodec_dec_disable_hardware(struct mtk_vcodec_dec_ctx *ctx, int hw_idx)
{
if (IS_VDEC_INNER_RACING(ctx->dev->dec_capability))
mtk_vcodec_record_racing_info(ctx);
mtk_vcodec_dec_disable_irq(ctx->dev, hw_idx);
mtk_vcodec_dec_child_dev_off(ctx->dev, hw_idx);
if (IS_VDEC_LAT_ARCH(ctx->dev->vdec_pdata->hw_arch) &&
hw_idx == MTK_VDEC_CORE)
mtk_vcodec_dec_child_dev_off(ctx->dev, MTK_VDEC_LAT0);
mutex_unlock(&ctx->dev->dec_mutex[hw_idx]);
}
EXPORT_SYMBOL_GPL(mtk_vcodec_dec_disable_hardware);
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