linux/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c
Wei Yongjun 3876420a88 [media] mtk-vcodec: remove redundant return value check of platform_get_resource()
Remove unneeded error handling on the result of a call
to platform_get_resource() when the value is passed to
devm_ioremap_resource().

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Tiffany Lin <tiffany.lin@mediatek.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-03-22 11:23:20 -03:00

429 lines
11 KiB
C

/*
* Copyright (c) 2016 MediaTek Inc.
* Author: PC Chen <pc.chen@mediatek.com>
* Tiffany Lin <tiffany.lin@mediatek.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of.h>
#include <media/v4l2-event.h>
#include <media/v4l2-mem2mem.h>
#include <media/videobuf2-dma-contig.h>
#include <linux/pm_runtime.h>
#include "mtk_vcodec_drv.h"
#include "mtk_vcodec_enc.h"
#include "mtk_vcodec_enc_pm.h"
#include "mtk_vcodec_intr.h"
#include "mtk_vcodec_util.h"
#include "mtk_vpu.h"
module_param(mtk_v4l2_dbg_level, int, S_IRUGO | S_IWUSR);
module_param(mtk_vcodec_dbg, bool, S_IRUGO | S_IWUSR);
/* Wake up context wait_queue */
static void wake_up_ctx(struct mtk_vcodec_ctx *ctx, unsigned int reason)
{
ctx->int_cond = 1;
ctx->int_type = reason;
wake_up_interruptible(&ctx->queue);
}
static void clean_irq_status(unsigned int irq_status, void __iomem *addr)
{
if (irq_status & MTK_VENC_IRQ_STATUS_PAUSE)
writel(MTK_VENC_IRQ_STATUS_PAUSE, addr);
if (irq_status & MTK_VENC_IRQ_STATUS_SWITCH)
writel(MTK_VENC_IRQ_STATUS_SWITCH, addr);
if (irq_status & MTK_VENC_IRQ_STATUS_DRAM)
writel(MTK_VENC_IRQ_STATUS_DRAM, addr);
if (irq_status & MTK_VENC_IRQ_STATUS_SPS)
writel(MTK_VENC_IRQ_STATUS_SPS, addr);
if (irq_status & MTK_VENC_IRQ_STATUS_PPS)
writel(MTK_VENC_IRQ_STATUS_PPS, addr);
if (irq_status & MTK_VENC_IRQ_STATUS_FRM)
writel(MTK_VENC_IRQ_STATUS_FRM, addr);
}
static irqreturn_t mtk_vcodec_enc_irq_handler(int irq, void *priv)
{
struct mtk_vcodec_dev *dev = priv;
struct mtk_vcodec_ctx *ctx;
unsigned long flags;
void __iomem *addr;
spin_lock_irqsave(&dev->irqlock, flags);
ctx = dev->curr_ctx;
spin_unlock_irqrestore(&dev->irqlock, flags);
mtk_v4l2_debug(1, "id=%d", ctx->id);
addr = dev->reg_base[VENC_SYS] + MTK_VENC_IRQ_ACK_OFFSET;
ctx->irq_status = readl(dev->reg_base[VENC_SYS] +
(MTK_VENC_IRQ_STATUS_OFFSET));
clean_irq_status(ctx->irq_status, addr);
wake_up_ctx(ctx, MTK_INST_IRQ_RECEIVED);
return IRQ_HANDLED;
}
static irqreturn_t mtk_vcodec_enc_lt_irq_handler(int irq, void *priv)
{
struct mtk_vcodec_dev *dev = priv;
struct mtk_vcodec_ctx *ctx;
unsigned long flags;
void __iomem *addr;
spin_lock_irqsave(&dev->irqlock, flags);
ctx = dev->curr_ctx;
spin_unlock_irqrestore(&dev->irqlock, flags);
mtk_v4l2_debug(1, "id=%d", ctx->id);
ctx->irq_status = readl(dev->reg_base[VENC_LT_SYS] +
(MTK_VENC_IRQ_STATUS_OFFSET));
addr = dev->reg_base[VENC_LT_SYS] + MTK_VENC_IRQ_ACK_OFFSET;
clean_irq_status(ctx->irq_status, addr);
wake_up_ctx(ctx, MTK_INST_IRQ_RECEIVED);
return IRQ_HANDLED;
}
static void mtk_vcodec_enc_reset_handler(void *priv)
{
struct mtk_vcodec_dev *dev = priv;
struct mtk_vcodec_ctx *ctx;
mtk_v4l2_debug(0, "Watchdog timeout!!");
mutex_lock(&dev->dev_mutex);
list_for_each_entry(ctx, &dev->ctx_list, list) {
ctx->state = MTK_STATE_ABORT;
mtk_v4l2_debug(0, "[%d] Change to state MTK_STATE_ABORT",
ctx->id);
}
mutex_unlock(&dev->dev_mutex);
}
static int fops_vcodec_open(struct file *file)
{
struct mtk_vcodec_dev *dev = video_drvdata(file);
struct mtk_vcodec_ctx *ctx = NULL;
int ret = 0;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
mutex_lock(&dev->dev_mutex);
/*
* Use simple counter to uniquely identify this context. Only
* used for logging.
*/
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;
init_waitqueue_head(&ctx->queue);
ctx->type = MTK_INST_ENCODER;
ret = mtk_vcodec_enc_ctrls_setup(ctx);
if (ret) {
mtk_v4l2_err("Failed to setup controls() (%d)",
ret);
goto err_ctrls_setup;
}
ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev_enc, ctx,
&mtk_vcodec_enc_queue_init);
if (IS_ERR((__force void *)ctx->m2m_ctx)) {
ret = PTR_ERR((__force void *)ctx->m2m_ctx);
mtk_v4l2_err("Failed to v4l2_m2m_ctx_init() (%d)",
ret);
goto err_m2m_ctx_init;
}
mtk_vcodec_enc_set_default_params(ctx);
if (v4l2_fh_is_singular(&ctx->fh)) {
/*
* vpu_load_firmware checks if it was loaded already and
* does nothing in that case
*/
ret = vpu_load_firmware(dev->vpu_plat_dev);
if (ret < 0) {
/*
* Return 0 if downloading firmware successfully,
* otherwise it is failed
*/
mtk_v4l2_err("vpu_load_firmware failed!");
goto err_load_fw;
}
dev->enc_capability =
vpu_get_venc_hw_capa(dev->vpu_plat_dev);
mtk_v4l2_debug(0, "encoder capability %x", dev->enc_capability);
}
mtk_v4l2_debug(2, "Create instance [%d]@%p m2m_ctx=%p ",
ctx->id, ctx, ctx->m2m_ctx);
list_add(&ctx->list, &dev->ctx_list);
mutex_unlock(&dev->dev_mutex);
mtk_v4l2_debug(0, "%s encoder [%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_dev *dev = video_drvdata(file);
struct mtk_vcodec_ctx *ctx = fh_to_ctx(file->private_data);
mtk_v4l2_debug(1, "[%d] encoder", ctx->id);
mutex_lock(&dev->dev_mutex);
mtk_vcodec_enc_release(ctx);
v4l2_fh_del(&ctx->fh);
v4l2_fh_exit(&ctx->fh);
v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
v4l2_m2m_ctx_release(ctx->m2m_ctx);
list_del_init(&ctx->list);
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 int mtk_vcodec_probe(struct platform_device *pdev)
{
struct mtk_vcodec_dev *dev;
struct video_device *vfd_enc;
struct resource *res;
int i, j, ret;
dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
INIT_LIST_HEAD(&dev->ctx_list);
dev->plat_dev = pdev;
dev->vpu_plat_dev = vpu_get_plat_device(dev->plat_dev);
if (dev->vpu_plat_dev == NULL) {
mtk_v4l2_err("[VPU] vpu device in not ready");
return -EPROBE_DEFER;
}
vpu_wdt_reg_handler(dev->vpu_plat_dev, mtk_vcodec_enc_reset_handler,
dev, VPU_RST_ENC);
ret = mtk_vcodec_init_enc_pm(dev);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to get mt vcodec clock source!");
return ret;
}
for (i = VENC_SYS, j = 0; i < NUM_MAX_VCODEC_REG_BASE; i++, j++) {
res = platform_get_resource(pdev, IORESOURCE_MEM, j);
dev->reg_base[i] = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR((__force void *)dev->reg_base[i])) {
ret = PTR_ERR((__force void *)dev->reg_base[i]);
goto err_res;
}
mtk_v4l2_debug(2, "reg[%d] base=0x%p", i, dev->reg_base[i]);
}
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (res == NULL) {
dev_err(&pdev->dev, "failed to get irq resource");
ret = -ENOENT;
goto err_res;
}
dev->enc_irq = platform_get_irq(pdev, 0);
ret = devm_request_irq(&pdev->dev, dev->enc_irq,
mtk_vcodec_enc_irq_handler,
0, pdev->name, dev);
if (ret) {
dev_err(&pdev->dev, "Failed to install dev->enc_irq %d (%d)",
dev->enc_irq,
ret);
ret = -EINVAL;
goto err_res;
}
dev->enc_lt_irq = platform_get_irq(pdev, 1);
ret = devm_request_irq(&pdev->dev,
dev->enc_lt_irq, mtk_vcodec_enc_lt_irq_handler,
0, pdev->name, dev);
if (ret) {
dev_err(&pdev->dev,
"Failed to install dev->enc_lt_irq %d (%d)",
dev->enc_lt_irq, ret);
ret = -EINVAL;
goto err_res;
}
disable_irq(dev->enc_irq);
disable_irq(dev->enc_lt_irq); /* VENC_LT */
mutex_init(&dev->enc_mutex);
mutex_init(&dev->dev_mutex);
spin_lock_init(&dev->irqlock);
snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name), "%s",
"[MTK_V4L2_VENC]");
ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
if (ret) {
mtk_v4l2_err("v4l2_device_register err=%d", ret);
goto err_res;
}
init_waitqueue_head(&dev->queue);
/* allocate video device for encoder and register it */
vfd_enc = video_device_alloc();
if (!vfd_enc) {
mtk_v4l2_err("Failed to allocate video device");
ret = -ENOMEM;
goto err_enc_alloc;
}
vfd_enc->fops = &mtk_vcodec_fops;
vfd_enc->ioctl_ops = &mtk_venc_ioctl_ops;
vfd_enc->release = video_device_release;
vfd_enc->lock = &dev->dev_mutex;
vfd_enc->v4l2_dev = &dev->v4l2_dev;
vfd_enc->vfl_dir = VFL_DIR_M2M;
vfd_enc->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE |
V4L2_CAP_STREAMING;
snprintf(vfd_enc->name, sizeof(vfd_enc->name), "%s",
MTK_VCODEC_ENC_NAME);
video_set_drvdata(vfd_enc, dev);
dev->vfd_enc = vfd_enc;
platform_set_drvdata(pdev, dev);
dev->m2m_dev_enc = v4l2_m2m_init(&mtk_venc_m2m_ops);
if (IS_ERR((__force void *)dev->m2m_dev_enc)) {
mtk_v4l2_err("Failed to init mem2mem enc device");
ret = PTR_ERR((__force void *)dev->m2m_dev_enc);
goto err_enc_mem_init;
}
dev->encode_workqueue =
alloc_ordered_workqueue(MTK_VCODEC_ENC_NAME,
WQ_MEM_RECLAIM |
WQ_FREEZABLE);
if (!dev->encode_workqueue) {
mtk_v4l2_err("Failed to create encode workqueue");
ret = -EINVAL;
goto err_event_workq;
}
ret = video_register_device(vfd_enc, VFL_TYPE_GRABBER, 1);
if (ret) {
mtk_v4l2_err("Failed to register video device");
goto err_enc_reg;
}
mtk_v4l2_debug(0, "encoder registered as /dev/video%d",
vfd_enc->num);
return 0;
err_enc_reg:
destroy_workqueue(dev->encode_workqueue);
err_event_workq:
v4l2_m2m_release(dev->m2m_dev_enc);
err_enc_mem_init:
video_unregister_device(vfd_enc);
err_enc_alloc:
v4l2_device_unregister(&dev->v4l2_dev);
err_res:
mtk_vcodec_release_enc_pm(dev);
return ret;
}
static const struct of_device_id mtk_vcodec_enc_match[] = {
{.compatible = "mediatek,mt8173-vcodec-enc",},
{},
};
MODULE_DEVICE_TABLE(of, mtk_vcodec_enc_match);
static int mtk_vcodec_enc_remove(struct platform_device *pdev)
{
struct mtk_vcodec_dev *dev = platform_get_drvdata(pdev);
mtk_v4l2_debug_enter();
flush_workqueue(dev->encode_workqueue);
destroy_workqueue(dev->encode_workqueue);
if (dev->m2m_dev_enc)
v4l2_m2m_release(dev->m2m_dev_enc);
if (dev->vfd_enc)
video_unregister_device(dev->vfd_enc);
v4l2_device_unregister(&dev->v4l2_dev);
mtk_vcodec_release_enc_pm(dev);
return 0;
}
static struct platform_driver mtk_vcodec_enc_driver = {
.probe = mtk_vcodec_probe,
.remove = mtk_vcodec_enc_remove,
.driver = {
.name = MTK_VCODEC_ENC_NAME,
.of_match_table = mtk_vcodec_enc_match,
},
};
module_platform_driver(mtk_vcodec_enc_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Mediatek video codec V4L2 encoder driver");