// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2016 MediaTek Inc.
* Author: PC Chen <[email protected]>
* Tiffany Lin <[email protected]>
*/
#include <linux/bitfield.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <media/v4l2-event.h>
#include <media/v4l2-mem2mem.h>
#include <media/videobuf2-dma-contig.h>
#include <media/v4l2-device.h>
#include "mtk_vcodec_dec.h"
#include "mtk_vcodec_dec_hw.h"
#include "mtk_vcodec_dec_pm.h"
#include "../common/mtk_vcodec_intr.h"
static int mtk_vcodec_get_hw_count(struct mtk_vcodec_dec_ctx *ctx, struct mtk_vcodec_dec_dev *dev)
{
switch (dev->vdec_pdata->hw_arch) {
case MTK_VDEC_PURE_SINGLE_CORE:
return MTK_VDEC_ONE_CORE;
case MTK_VDEC_LAT_SINGLE_CORE:
return MTK_VDEC_ONE_LAT_ONE_CORE;
default:
mtk_v4l2_vdec_err(ctx, "hw arch %d not supported", dev->vdec_pdata->hw_arch);
return MTK_VDEC_NO_HW;
}
}
static bool mtk_vcodec_is_hw_active(struct mtk_vcodec_dec_dev *dev)
{
u32 cg_status;
if (dev->vdecsys_regmap)
return !regmap_test_bits(dev->vdecsys_regmap, VDEC_HW_ACTIVE_ADDR,
VDEC_HW_ACTIVE_MASK);
cg_status = readl(dev->reg_base[VDEC_SYS] + VDEC_HW_ACTIVE_ADDR);
return !FIELD_GET(VDEC_HW_ACTIVE_MASK, cg_status);
}
static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv)
{
struct mtk_vcodec_dec_dev *dev = priv;
struct mtk_vcodec_dec_ctx *ctx;
unsigned int dec_done_status = 0;
void __iomem *vdec_misc_addr = dev->reg_base[VDEC_MISC] +
VDEC_IRQ_CFG_REG;
ctx = mtk_vcodec_get_curr_ctx(dev, MTK_VDEC_CORE);
if (!mtk_vcodec_is_hw_active(dev)) {
mtk_v4l2_vdec_err(ctx, "DEC ISR, VDEC active is not 0x0");
return IRQ_HANDLED;
}
dec_done_status = readl(vdec_misc_addr);
ctx->irq_status = dec_done_status;
if ((dec_done_status & MTK_VDEC_IRQ_STATUS_DEC_SUCCESS) !=
MTK_VDEC_IRQ_STATUS_DEC_SUCCESS)
return IRQ_HANDLED;
/* clear interrupt */
writel((readl(vdec_misc_addr) | VDEC_IRQ_CFG),
dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG);
writel((readl(vdec_misc_addr) & ~VDEC_IRQ_CLR),
dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG);
wake_up_dec_ctx(ctx, MTK_INST_IRQ_RECEIVED, 0);
mtk_v4l2_vdec_dbg(3, ctx, "wake up ctx %d, dec_done_status=%x", ctx->id, dec_done_status);
return IRQ_HANDLED;
}
static int mtk_vcodec_get_reg_bases(struct mtk_vcodec_dec_dev *dev)
{
struct platform_device *pdev = dev->plat_dev;
int reg_num, i;
struct resource *res;
bool has_vdecsys_reg;
int num_max_vdec_regs;
static const char * const mtk_dec_reg_names[] = {
"misc",
"ld",
"top",
"cm",
"ad",
"av",
"pp",
"hwd",
"hwq",
"hwb",
"hwg"
};
/*
* If we have reg-names in devicetree, this means that we're on a new
* register organization, which implies that the VDEC_SYS iospace gets
* R/W through a syscon (regmap).
* Here we try to get the "misc" iostart only to check if we have reg-names
*/
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "misc");
if (res)
has_vdecsys_reg = false;
else
has_vdecsys_reg = true;
num_max_vdec_regs = has_vdecsys_reg ? NUM_MAX_VDEC_REG_BASE :
ARRAY_SIZE(mtk_dec_reg_names);
/* Sizeof(u32) * 4 bytes for each register base. */
reg_num = of_property_count_elems_of_size(pdev->dev.of_node, "reg",
sizeof(u32) * 4);
if (reg_num <= 0 || reg_num > num_max_vdec_regs) {
dev_err(&pdev->dev, "Invalid register property size: %d\n", reg_num);
return -EINVAL;
}
if (has_vdecsys_reg) {
for (i = 0; i < reg_num; i++) {
dev->reg_base[i] = devm_platform_ioremap_resource(pdev, i);
if (IS_ERR(dev->reg_base[i]))
return PTR_ERR(dev->reg_base[i]);
dev_dbg(&pdev->dev, "reg[%d] base=%p", i, dev->reg_base[i]);
}
} else {
for (i = 0; i < reg_num; i++) {
dev->reg_base[i+1] = devm_platform_ioremap_resource_byname(pdev, mtk_dec_reg_names[i]);
if (IS_ERR(dev->reg_base[i+1]))
return PTR_ERR(dev->reg_base[i+1]);
dev_dbg(&pdev->dev, "reg[%d] base=%p", i + 1, dev->reg_base[i + 1]);
}
dev->vdecsys_regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
"mediatek,vdecsys");
if (IS_ERR(dev->vdecsys_regmap)) {
dev_err(&pdev->dev, "Missing mediatek,vdecsys property");
return PTR_ERR(dev->vdecsys_regmap);
}
}
return 0;
}
static int mtk_vcodec_init_dec_resources(struct mtk_vcodec_dec_dev *dev)
{
struct platform_device *pdev = dev->plat_dev;
int ret;
ret = mtk_vcodec_get_reg_bases(dev);
if (ret)
return ret;
if (dev->vdec_pdata->is_subdev_supported)
return 0;
dev->dec_irq = platform_get_irq(pdev, 0);
if (dev->dec_irq < 0)
return dev->dec_irq;
irq_set_status_flags(dev->dec_irq, IRQ_NOAUTOEN);
ret = devm_request_irq(&pdev->dev, dev->dec_irq,
mtk_vcodec_dec_irq_handler, 0, pdev->name, dev);
if (ret) {
dev_err(&pdev->dev, "failed to install dev->dec_irq %d (%d)",
dev->dec_irq, ret);
return ret;
}
ret = mtk_vcodec_init_dec_clk(pdev, &dev->pm);
if (ret < 0) {
dev_err(&pdev->dev, "failed to get mt vcodec clock source");
return ret;
}
pm_runtime_enable(&pdev->dev);
return 0;
}
static int fops_vcodec_open(struct file *file)
{
struct mtk_vcodec_dec_dev *dev = video_drvdata(file);
struct mtk_vcodec_dec_ctx *ctx = NULL;
int ret = 0, i, hw_count;
struct vb2_queue *src_vq;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
mutex_lock(&dev->dev_mutex);
ctx->id = dev->id_counter++;
v4l2_fh_init(&ctx->fh, video_devdata(file));
file->private_data = &ctx->fh;
v4l2_fh_add(&ctx->fh);
INIT_LIST_HEAD(&ctx->list);
ctx->dev = dev;
if (ctx->dev->vdec_pdata->is_subdev_supported) {
hw_count = mtk_vcodec_get_hw_count(ctx, dev);
if (!hw_count || !dev->subdev_prob_done) {
ret = -EINVAL;
goto err_ctrls_setup;
}
ret = dev->subdev_prob_done(dev);
if (ret)
goto err_ctrls_setup;
for (i = 0; i < hw_count; i++)
init_waitqueue_head(&ctx->queue[i]);
} else {
init_waitqueue_head(&ctx->queue[0]);
}
mutex_init(&ctx->lock);
ctx->type = MTK_INST_DECODER;
ret = dev->vdec_pdata->ctrls_setup(ctx);
if (ret) {
mtk_v4l2_vdec_err(ctx, "Failed to setup mt vcodec controls");
goto err_ctrls_setup;
}
ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev_dec, ctx,
&mtk_vcodec_dec_queue_init);
if (IS_ERR((__force void *)ctx->m2m_ctx)) {
ret = PTR_ERR((__force void *)ctx->m2m_ctx);
mtk_v4l2_vdec_err(ctx, "Failed to v4l2_m2m_ctx_init() (%d)", ret);
goto err_m2m_ctx_init;
}
src_vq = v4l2_m2m_get_vq(ctx->m2m_ctx,
V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
ctx->empty_flush_buf.vb.vb2_buf.vb2_queue = src_vq;
mtk_vcodec_dec_set_default_params(ctx);
if (v4l2_fh_is_singular(&ctx->fh)) {
/*
* Does nothing if firmware was already loaded.
*/
ret = mtk_vcodec_fw_load_firmware(dev->fw_handler);
if (ret < 0) {
/*
* Return 0 if downloading firmware successfully,
* otherwise it is failed
*/
mtk_v4l2_vdec_err(ctx, "failed to load firmware!");
goto err_load_fw;
}
dev->dec_capability =
mtk_vcodec_fw_get_vdec_capa(dev->fw_handler);
mtk_v4l2_vdec_dbg(0, ctx, "decoder capability %x", dev->dec_capability);
}
ctx->dev->vdec_pdata->init_vdec_params(ctx);
mutex_lock(&dev->dev_ctx_lock);
list_add(&ctx->list, &dev->ctx_list);
mutex_unlock(&dev->dev_ctx_lock);
mtk_vcodec_dbgfs_create(ctx);
mutex_unlock(&dev->dev_mutex);
mtk_v4l2_vdec_dbg(0, ctx, "%s decoder [%d]", dev_name(&dev->plat_dev->dev), ctx->id);
return ret;
/* Deinit when failure occurred */
err_load_fw:
v4l2_m2m_ctx_release(ctx->m2m_ctx);
err_m2m_ctx_init:
v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
err_ctrls_setup:
v4l2_fh_del(&ctx->fh);
v4l2_fh_exit(&ctx->fh);
kfree(ctx);
mutex_unlock(&dev->dev_mutex);
return ret;
}
static int fops_vcodec_release(struct file *file)
{
struct mtk_vcodec_dec_dev *dev = video_drvdata(file);
struct mtk_vcodec_dec_ctx *ctx = fh_to_dec_ctx(file->private_data);
mtk_v4l2_vdec_dbg(0, ctx, "[%d] decoder", ctx->id);
mutex_lock(&dev->dev_mutex);
/*
* Call v4l2_m2m_ctx_release before mtk_vcodec_dec_release. First, it
* makes sure the worker thread is not running after vdec_if_deinit.
* Second, the decoder will be flushed and all the buffers will be
* returned in stop_streaming.
*/
v4l2_m2m_ctx_release(ctx->m2m_ctx);
mtk_vcodec_dec_release(ctx);
v4l2_fh_del(&ctx->fh);
v4l2_fh_exit(&ctx->fh);
v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
mtk_vcodec_dbgfs_remove(dev, ctx->id);
mutex_lock(&dev->dev_ctx_lock);
list_del_init(&ctx->list);
mutex_unlock(&dev->dev_ctx_lock);
kfree(ctx);
mutex_unlock(&dev->dev_mutex);
return 0;
}
static const struct v4l2_file_operations mtk_vcodec_fops = {
.owner = THIS_MODULE,
.open = fops_vcodec_open,
.release = fops_vcodec_release,
.poll = v4l2_m2m_fop_poll,
.unlocked_ioctl = video_ioctl2,
.mmap = v4l2_m2m_fop_mmap,
};
static void mtk_vcodec_dec_get_chip_name(struct mtk_vcodec_dec_dev *vdec_dev)
{
struct device *dev = &vdec_dev->plat_dev->dev;
if (of_device_is_compatible(dev->of_node, "mediatek,mt8173-vcodec-dec"))
vdec_dev->chip_name = MTK_VDEC_MT8173;
else if (of_device_is_compatible(dev->of_node, "mediatek,mt8183-vcodec-dec"))
vdec_dev->chip_name = MTK_VDEC_MT8183;
else if (of_device_is_compatible(dev->of_node, "mediatek,mt8192-vcodec-dec"))
vdec_dev->chip_name = MTK_VDEC_MT8192;
else if (of_device_is_compatible(dev->of_node, "mediatek,mt8195-vcodec-dec"))
vdec_dev->chip_name = MTK_VDEC_MT8195;
else if (of_device_is_compatible(dev->of_node, "mediatek,mt8186-vcodec-dec"))
vdec_dev->chip_name = MTK_VDEC_MT8186;
else if (of_device_is_compatible(dev->of_node, "mediatek,mt8188-vcodec-dec"))
vdec_dev->chip_name = MTK_VDEC_MT8188;
else
vdec_dev->chip_name = MTK_VDEC_INVAL;
}
static int mtk_vcodec_probe(struct platform_device *pdev)
{
struct mtk_vcodec_dec_dev *dev;
struct video_device *vfd_dec;
phandle rproc_phandle;
enum mtk_vcodec_fw_type fw_type;
int i, ret;
dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
INIT_LIST_HEAD(&dev->ctx_list);
dev->plat_dev = pdev;
mtk_vcodec_dec_get_chip_name(dev);
if (dev->chip_name == MTK_VDEC_INVAL) {
dev_err(&pdev->dev, "Failed to get decoder chip name");
return -EINVAL;
}
dev->vdec_pdata = of_device_get_match_data(&pdev->dev);
if (!of_property_read_u32(pdev->dev.of_node, "mediatek,vpu",
&rproc_phandle)) {
fw_type = VPU;
} else if (!of_property_read_u32(pdev->dev.of_node, "mediatek,scp",
&rproc_phandle)) {
fw_type = SCP;
} else {
dev_dbg(&pdev->dev, "Could not get vdec IPI device");
return -ENODEV;
}
dma_set_max_seg_size(&pdev->dev, UINT_MAX);
dev->fw_handler = mtk_vcodec_fw_select(dev, fw_type, DECODER);
if (IS_ERR(dev->fw_handler))
return PTR_ERR(dev->fw_handler);
ret = mtk_vcodec_init_dec_resources(dev);
if (ret) {
dev_err(&pdev->dev, "Failed to init dec resources");
goto err_dec_pm;
}
if (IS_VDEC_LAT_ARCH(dev->vdec_pdata->hw_arch)) {
dev->core_workqueue =
alloc_ordered_workqueue("core-decoder",
WQ_MEM_RECLAIM | WQ_FREEZABLE);
if (!dev->core_workqueue) {
dev_dbg(&pdev->dev, "Failed to create core workqueue");
ret = -EINVAL;
goto err_res;
}
}
for (i = 0; i < MTK_VDEC_HW_MAX; i++)
mutex_init(&dev->dec_mutex[i]);
mutex_init(&dev->dev_mutex);
mutex_init(&dev->dev_ctx_lock);
spin_lock_init(&dev->irqlock);
snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name), "%s",
"[/MTK_V4L2_VDEC]");
ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
if (ret) {
dev_err(&pdev->dev, "v4l2_device_register err=%d", ret);
goto err_core_workq;
}
vfd_dec = video_device_alloc();
if (!vfd_dec) {
dev_err(&pdev->dev, "Failed to allocate video device");
ret = -ENOMEM;
goto err_dec_alloc;
}
vfd_dec->fops = &mtk_vcodec_fops;
vfd_dec->ioctl_ops = &mtk_vdec_ioctl_ops;
vfd_dec->release = video_device_release;
vfd_dec->lock = &dev->dev_mutex;
vfd_dec->v4l2_dev = &dev->v4l2_dev;
vfd_dec->vfl_dir = VFL_DIR_M2M;
vfd_dec->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE |
V4L2_CAP_STREAMING;
snprintf(vfd_dec->name, sizeof(vfd_dec->name), "%s",
MTK_VCODEC_DEC_NAME);
video_set_drvdata(vfd_dec, dev);
dev->vfd_dec = vfd_dec;
platform_set_drvdata(pdev, dev);
dev->m2m_dev_dec = v4l2_m2m_init(&mtk_vdec_m2m_ops);
if (IS_ERR((__force void *)dev->m2m_dev_dec)) {
dev_err(&pdev->dev, "Failed to init mem2mem dec device");
ret = PTR_ERR((__force void *)dev->m2m_dev_dec);
goto err_dec_alloc;
}
dev->decode_workqueue =
alloc_ordered_workqueue(MTK_VCODEC_DEC_NAME,
WQ_MEM_RECLAIM | WQ_FREEZABLE);
if (!dev->decode_workqueue) {
dev_err(&pdev->dev, "Failed to create decode workqueue");
ret = -EINVAL;
goto err_event_workq;
}
if (dev->vdec_pdata->is_subdev_supported) {
ret = of_platform_populate(pdev->dev.of_node, NULL, NULL,
&pdev->dev);
if (ret) {
dev_err(&pdev->dev, "Main device of_platform_populate failed.");
goto err_reg_cont;
}
} else {
set_bit(MTK_VDEC_CORE, dev->subdev_bitmap);
}
atomic_set(&dev->dec_active_cnt, 0);
memset(dev->vdec_racing_info, 0, sizeof(dev->vdec_racing_info));
mutex_init(&dev->dec_racing_info_mutex);
ret = video_register_device(vfd_dec, VFL_TYPE_VIDEO, -1);
if (ret) {
dev_err(&pdev->dev, "Failed to register video device");
goto err_reg_cont;
}
if (dev->vdec_pdata->uses_stateless_api) {
v4l2_disable_ioctl(vfd_dec, VIDIOC_DECODER_CMD);
v4l2_disable_ioctl(vfd_dec, VIDIOC_TRY_DECODER_CMD);
dev->mdev_dec.dev = &pdev->dev;
strscpy(dev->mdev_dec.model, MTK_VCODEC_DEC_NAME,
sizeof(dev->mdev_dec.model));
media_device_init(&dev->mdev_dec);
dev->mdev_dec.ops = &mtk_vcodec_media_ops;
dev->v4l2_dev.mdev = &dev->mdev_dec;
ret = v4l2_m2m_register_media_controller(dev->m2m_dev_dec, dev->vfd_dec,
MEDIA_ENT_F_PROC_VIDEO_DECODER);
if (ret) {
dev_err(&pdev->dev, "Failed to register media controller");
goto err_dec_mem_init;
}
ret = media_device_register(&dev->mdev_dec);
if (ret) {
dev_err(&pdev->dev, "Failed to register media device");
goto err_media_reg;
}
dev_dbg(&pdev->dev, "media registered as /dev/media%d", vfd_dec->minor);
}
mtk_vcodec_dbgfs_init(dev, false);
dev_dbg(&pdev->dev, "decoder registered as /dev/video%d", vfd_dec->minor);
return 0;
err_media_reg:
v4l2_m2m_unregister_media_controller(dev->m2m_dev_dec);
err_dec_mem_init:
video_unregister_device(vfd_dec);
err_reg_cont:
if (dev->vdec_pdata->uses_stateless_api)
media_device_cleanup(&dev->mdev_dec);
destroy_workqueue(dev->decode_workqueue);
err_event_workq:
v4l2_m2m_release(dev->m2m_dev_dec);
err_dec_alloc:
v4l2_device_unregister(&dev->v4l2_dev);
err_core_workq:
if (IS_VDEC_LAT_ARCH(dev->vdec_pdata->hw_arch))
destroy_workqueue(dev->core_workqueue);
err_res:
if (!dev->vdec_pdata->is_subdev_supported)
pm_runtime_disable(dev->pm.dev);
err_dec_pm:
mtk_vcodec_fw_release(dev->fw_handler);
return ret;
}
static const struct of_device_id mtk_vcodec_match[] = {
{
.compatible = "mediatek,mt8173-vcodec-dec",
.data = &mtk_vdec_8173_pdata,
},
{
.compatible = "mediatek,mt8183-vcodec-dec",
.data = &mtk_vdec_8183_pdata,
},
{
.compatible = "mediatek,mt8192-vcodec-dec",
.data = &mtk_lat_sig_core_pdata,
},
{
.compatible = "mediatek,mt8186-vcodec-dec",
.data = &mtk_vdec_single_core_pdata,
},
{
.compatible = "mediatek,mt8195-vcodec-dec",
.data = &mtk_lat_sig_core_pdata,
},
{
.compatible = "mediatek,mt8188-vcodec-dec",
.data = &mtk_lat_sig_core_pdata,
},
{},
};
MODULE_DEVICE_TABLE(of, mtk_vcodec_match);
static void mtk_vcodec_dec_remove(struct platform_device *pdev)
{
struct mtk_vcodec_dec_dev *dev = platform_get_drvdata(pdev);
destroy_workqueue(dev->decode_workqueue);
if (media_devnode_is_registered(dev->mdev_dec.devnode)) {
media_device_unregister(&dev->mdev_dec);
v4l2_m2m_unregister_media_controller(dev->m2m_dev_dec);
media_device_cleanup(&dev->mdev_dec);
}
if (dev->m2m_dev_dec)
v4l2_m2m_release(dev->m2m_dev_dec);
if (dev->vfd_dec)
video_unregister_device(dev->vfd_dec);
mtk_vcodec_dbgfs_deinit(&dev->dbgfs);
v4l2_device_unregister(&dev->v4l2_dev);
if (!dev->vdec_pdata->is_subdev_supported)
pm_runtime_disable(dev->pm.dev);
mtk_vcodec_fw_release(dev->fw_handler);
}
static struct platform_driver mtk_vcodec_dec_driver = {
.probe = mtk_vcodec_probe,
.remove_new = mtk_vcodec_dec_remove,
.driver = {
.name = MTK_VCODEC_DEC_NAME,
.of_match_table = mtk_vcodec_match,
},
};
module_platform_driver(mtk_vcodec_dec_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Mediatek video codec V4L2 decoder driver");
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