// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2016 MediaTek Inc.
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* Author: PC Chen <pc.chen@mediatek.com>
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* Tiffany Lin <tiffany.lin@mediatek.com>
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*/
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/of.h>
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#include <media/v4l2-event.h>
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#include <media/v4l2-mem2mem.h>
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#include <media/videobuf2-dma-contig.h>
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#include "mtk_vcodec_drv.h"
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#include "mtk_vcodec_dec.h"
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#include "mtk_vcodec_dec_pm.h"
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#include "mtk_vcodec_intr.h"
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#include "mtk_vcodec_util.h"
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#include "mtk_vcodec_fw.h"
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#define VDEC_HW_ACTIVE 0x10
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#define VDEC_IRQ_CFG 0x11
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#define VDEC_IRQ_CLR 0x10
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#define VDEC_IRQ_CFG_REG 0xa4
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module_param(mtk_v4l2_dbg_level, int, 0644);
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module_param(mtk_vcodec_dbg, bool, 0644);
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/* Wake up context wait_queue */
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static void wake_up_ctx(struct mtk_vcodec_ctx *ctx)
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{
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ctx->int_cond = 1;
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wake_up_interruptible(&ctx->queue);
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}
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static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv)
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{
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struct mtk_vcodec_dev *dev = priv;
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struct mtk_vcodec_ctx *ctx;
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u32 cg_status = 0;
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unsigned int dec_done_status = 0;
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void __iomem *vdec_misc_addr = dev->reg_base[VDEC_MISC] +
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VDEC_IRQ_CFG_REG;
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ctx = mtk_vcodec_get_curr_ctx(dev);
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/* check if HW active or not */
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cg_status = readl(dev->reg_base[0]);
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if ((cg_status & VDEC_HW_ACTIVE) != 0) {
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mtk_v4l2_err("DEC ISR, VDEC active is not 0x0 (0x%08x)",
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cg_status);
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return IRQ_HANDLED;
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}
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dec_done_status = readl(vdec_misc_addr);
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ctx->irq_status = dec_done_status;
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if ((dec_done_status & MTK_VDEC_IRQ_STATUS_DEC_SUCCESS) !=
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MTK_VDEC_IRQ_STATUS_DEC_SUCCESS)
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return IRQ_HANDLED;
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/* clear interrupt */
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writel((readl(vdec_misc_addr) | VDEC_IRQ_CFG),
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dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG);
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writel((readl(vdec_misc_addr) & ~VDEC_IRQ_CLR),
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dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG);
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wake_up_ctx(ctx);
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mtk_v4l2_debug(3,
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"mtk_vcodec_dec_irq_handler :wake up ctx %d, dec_done_status=%x",
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ctx->id, dec_done_status);
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return IRQ_HANDLED;
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}
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static int fops_vcodec_open(struct file *file)
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{
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struct mtk_vcodec_dev *dev = video_drvdata(file);
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struct mtk_vcodec_ctx *ctx = NULL;
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struct mtk_video_dec_buf *mtk_buf = NULL;
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int ret = 0;
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struct vb2_queue *src_vq;
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ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return -ENOMEM;
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mtk_buf = kzalloc(sizeof(*mtk_buf), GFP_KERNEL);
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if (!mtk_buf) {
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kfree(ctx);
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return -ENOMEM;
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}
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mutex_lock(&dev->dev_mutex);
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ctx->empty_flush_buf = mtk_buf;
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ctx->id = dev->id_counter++;
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v4l2_fh_init(&ctx->fh, video_devdata(file));
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file->private_data = &ctx->fh;
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v4l2_fh_add(&ctx->fh);
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INIT_LIST_HEAD(&ctx->list);
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ctx->dev = dev;
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init_waitqueue_head(&ctx->queue);
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mutex_init(&ctx->lock);
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ctx->type = MTK_INST_DECODER;
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ret = mtk_vcodec_dec_ctrls_setup(ctx);
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if (ret) {
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mtk_v4l2_err("Failed to setup mt vcodec controls");
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goto err_ctrls_setup;
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}
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ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev_dec, ctx,
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&mtk_vcodec_dec_queue_init);
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if (IS_ERR((__force void *)ctx->m2m_ctx)) {
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ret = PTR_ERR((__force void *)ctx->m2m_ctx);
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mtk_v4l2_err("Failed to v4l2_m2m_ctx_init() (%d)",
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ret);
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goto err_m2m_ctx_init;
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}
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src_vq = v4l2_m2m_get_vq(ctx->m2m_ctx,
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V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
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ctx->empty_flush_buf->m2m_buf.vb.vb2_buf.vb2_queue = src_vq;
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ctx->empty_flush_buf->lastframe = true;
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mtk_vcodec_dec_set_default_params(ctx);
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if (v4l2_fh_is_singular(&ctx->fh)) {
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ret = mtk_vcodec_dec_pw_on(&dev->pm);
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if (ret < 0)
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goto err_load_fw;
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/*
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* Does nothing if firmware was already loaded.
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*/
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ret = mtk_vcodec_fw_load_firmware(dev->fw_handler);
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if (ret < 0) {
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/*
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* Return 0 if downloading firmware successfully,
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* otherwise it is failed
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*/
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mtk_v4l2_err("failed to load firmware!");
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goto err_load_fw;
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}
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dev->dec_capability =
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mtk_vcodec_fw_get_vdec_capa(dev->fw_handler);
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mtk_v4l2_debug(0, "decoder capability %x", dev->dec_capability);
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}
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list_add(&ctx->list, &dev->ctx_list);
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mutex_unlock(&dev->dev_mutex);
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mtk_v4l2_debug(0, "%s decoder [%d]", dev_name(&dev->plat_dev->dev),
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ctx->id);
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return ret;
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/* Deinit when failure occurred */
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err_load_fw:
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v4l2_m2m_ctx_release(ctx->m2m_ctx);
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err_m2m_ctx_init:
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v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
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err_ctrls_setup:
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v4l2_fh_del(&ctx->fh);
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v4l2_fh_exit(&ctx->fh);
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kfree(ctx->empty_flush_buf);
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kfree(ctx);
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mutex_unlock(&dev->dev_mutex);
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return ret;
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}
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static int fops_vcodec_release(struct file *file)
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{
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struct mtk_vcodec_dev *dev = video_drvdata(file);
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struct mtk_vcodec_ctx *ctx = fh_to_ctx(file->private_data);
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mtk_v4l2_debug(0, "[%d] decoder", ctx->id);
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mutex_lock(&dev->dev_mutex);
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/*
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* Call v4l2_m2m_ctx_release before mtk_vcodec_dec_release. First, it
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* makes sure the worker thread is not running after vdec_if_deinit.
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* Second, the decoder will be flushed and all the buffers will be
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* returned in stop_streaming.
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*/
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v4l2_m2m_ctx_release(ctx->m2m_ctx);
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mtk_vcodec_dec_release(ctx);
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if (v4l2_fh_is_singular(&ctx->fh))
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mtk_vcodec_dec_pw_off(&dev->pm);
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v4l2_fh_del(&ctx->fh);
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v4l2_fh_exit(&ctx->fh);
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v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
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list_del_init(&ctx->list);
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kfree(ctx->empty_flush_buf);
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kfree(ctx);
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mutex_unlock(&dev->dev_mutex);
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return 0;
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}
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static const struct v4l2_file_operations mtk_vcodec_fops = {
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.owner = THIS_MODULE,
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.open = fops_vcodec_open,
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.release = fops_vcodec_release,
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.poll = v4l2_m2m_fop_poll,
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.unlocked_ioctl = video_ioctl2,
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.mmap = v4l2_m2m_fop_mmap,
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};
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static int mtk_vcodec_probe(struct platform_device *pdev)
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{
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struct mtk_vcodec_dev *dev;
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struct video_device *vfd_dec;
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struct resource *res;
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phandle rproc_phandle;
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enum mtk_vcodec_fw_type fw_type;
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int i, ret;
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dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
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if (!dev)
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return -ENOMEM;
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INIT_LIST_HEAD(&dev->ctx_list);
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dev->plat_dev = pdev;
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if (!of_property_read_u32(pdev->dev.of_node, "mediatek,vpu",
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&rproc_phandle)) {
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fw_type = VPU;
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} else if (!of_property_read_u32(pdev->dev.of_node, "mediatek,scp",
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&rproc_phandle)) {
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fw_type = SCP;
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} else {
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mtk_v4l2_err("Could not get vdec IPI device");
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return -ENODEV;
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}
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if (!pdev->dev.dma_parms) {
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pdev->dev.dma_parms = devm_kzalloc(&pdev->dev,
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sizeof(*pdev->dev.dma_parms),
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GFP_KERNEL);
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if (!pdev->dev.dma_parms)
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return -ENOMEM;
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}
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dma_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
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dev->fw_handler = mtk_vcodec_fw_select(dev, fw_type, DECODER);
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if (IS_ERR(dev->fw_handler))
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return PTR_ERR(dev->fw_handler);
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ret = mtk_vcodec_init_dec_pm(dev);
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if (ret < 0) {
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dev_err(&pdev->dev, "Failed to get mt vcodec clock source");
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goto err_dec_pm;
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}
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for (i = 0; i < NUM_MAX_VDEC_REG_BASE; i++) {
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dev->reg_base[i] = devm_platform_ioremap_resource(pdev, i);
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if (IS_ERR((__force void *)dev->reg_base[i])) {
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ret = PTR_ERR((__force void *)dev->reg_base[i]);
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goto err_res;
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}
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mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
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}
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res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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if (res == NULL) {
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dev_err(&pdev->dev, "failed to get irq resource");
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ret = -ENOENT;
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goto err_res;
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}
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dev->dec_irq = platform_get_irq(pdev, 0);
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irq_set_status_flags(dev->dec_irq, IRQ_NOAUTOEN);
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ret = devm_request_irq(&pdev->dev, dev->dec_irq,
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mtk_vcodec_dec_irq_handler, 0, pdev->name, dev);
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if (ret) {
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dev_err(&pdev->dev, "Failed to install dev->dec_irq %d (%d)",
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dev->dec_irq,
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ret);
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goto err_res;
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}
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mutex_init(&dev->dec_mutex);
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mutex_init(&dev->dev_mutex);
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spin_lock_init(&dev->irqlock);
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snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name), "%s",
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"[/MTK_V4L2_VDEC]");
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ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
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if (ret) {
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mtk_v4l2_err("v4l2_device_register err=%d", ret);
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goto err_res;
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}
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init_waitqueue_head(&dev->queue);
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vfd_dec = video_device_alloc();
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if (!vfd_dec) {
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mtk_v4l2_err("Failed to allocate video device");
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ret = -ENOMEM;
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goto err_dec_alloc;
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}
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vfd_dec->fops = &mtk_vcodec_fops;
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vfd_dec->ioctl_ops = &mtk_vdec_ioctl_ops;
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vfd_dec->release = video_device_release;
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vfd_dec->lock = &dev->dev_mutex;
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vfd_dec->v4l2_dev = &dev->v4l2_dev;
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vfd_dec->vfl_dir = VFL_DIR_M2M;
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vfd_dec->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE |
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V4L2_CAP_STREAMING;
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snprintf(vfd_dec->name, sizeof(vfd_dec->name), "%s",
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MTK_VCODEC_DEC_NAME);
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video_set_drvdata(vfd_dec, dev);
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dev->vfd_dec = vfd_dec;
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platform_set_drvdata(pdev, dev);
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dev->m2m_dev_dec = v4l2_m2m_init(&mtk_vdec_m2m_ops);
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if (IS_ERR((__force void *)dev->m2m_dev_dec)) {
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mtk_v4l2_err("Failed to init mem2mem dec device");
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ret = PTR_ERR((__force void *)dev->m2m_dev_dec);
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goto err_dec_mem_init;
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}
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dev->decode_workqueue =
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alloc_ordered_workqueue(MTK_VCODEC_DEC_NAME,
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WQ_MEM_RECLAIM | WQ_FREEZABLE);
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if (!dev->decode_workqueue) {
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mtk_v4l2_err("Failed to create decode workqueue");
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ret = -EINVAL;
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goto err_event_workq;
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}
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ret = video_register_device(vfd_dec, VFL_TYPE_VIDEO, 0);
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if (ret) {
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mtk_v4l2_err("Failed to register video device");
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goto err_dec_reg;
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}
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mtk_v4l2_debug(0, "decoder registered as /dev/video%d",
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vfd_dec->num);
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return 0;
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err_dec_reg:
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destroy_workqueue(dev->decode_workqueue);
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err_event_workq:
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v4l2_m2m_release(dev->m2m_dev_dec);
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err_dec_mem_init:
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video_unregister_device(vfd_dec);
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err_dec_alloc:
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v4l2_device_unregister(&dev->v4l2_dev);
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err_res:
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mtk_vcodec_release_dec_pm(dev);
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err_dec_pm:
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mtk_vcodec_fw_release(dev->fw_handler);
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return ret;
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}
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static const struct of_device_id mtk_vcodec_match[] = {
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{.compatible = "mediatek,mt8173-vcodec-dec",},
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{},
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};
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MODULE_DEVICE_TABLE(of, mtk_vcodec_match);
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static int mtk_vcodec_dec_remove(struct platform_device *pdev)
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{
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struct mtk_vcodec_dev *dev = platform_get_drvdata(pdev);
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flush_workqueue(dev->decode_workqueue);
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destroy_workqueue(dev->decode_workqueue);
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if (dev->m2m_dev_dec)
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v4l2_m2m_release(dev->m2m_dev_dec);
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if (dev->vfd_dec)
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video_unregister_device(dev->vfd_dec);
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v4l2_device_unregister(&dev->v4l2_dev);
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mtk_vcodec_release_dec_pm(dev);
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mtk_vcodec_fw_release(dev->fw_handler);
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return 0;
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}
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static struct platform_driver mtk_vcodec_dec_driver = {
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.probe = mtk_vcodec_probe,
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.remove = mtk_vcodec_dec_remove,
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.driver = {
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.name = MTK_VCODEC_DEC_NAME,
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.of_match_table = mtk_vcodec_match,
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},
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};
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module_platform_driver(mtk_vcodec_dec_driver);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("Mediatek video codec V4L2 decoder driver");
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