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Date: Mon, 14 Nov 2016 11:07:29 +0100
From: Hans Verkuil <hverkuil@...all.nl>
To: Florent Revest <florent.revest@...e-electrons.com>,
linux-media@...r.kernel.org
Cc: linux-sunxi@...glegroups.com, maxime.ripard@...e-electrons.com,
posciak@...omium.org, hans.verkuil@...co.com,
thomas.petazzoni@...e-electrons.com, mchehab@...nel.org,
linux-kernel@...r.kernel.org, wens@...e.org
Subject: Re: [RFC 06/10] media: platform: Add Sunxi Cedrus decoder driver
On 08/25/2016 11:39 AM, Florent Revest wrote:
> This patch adds a "sunxi-cedrus" v4l2 m2m decoder driver for
> Allwinner's Video Processing Unit. This VPU has a low-level interface
> which requires manual registers writing for frame headers. Hence, it
> depends on the Request API to synchronize buffers with controls.
>
> Most of the reverse engineering on which I based my work comes from the
> "Cedrus" project: http://linux-sunxi.org/Cedrus
>
> The driver currently only runs on the A13 and this patch doesn't
> include any codec.
>
> Signed-off-by: Florent Revest <florent.revest@...e-electrons.com>
> ---
> drivers/media/platform/Kconfig | 13 +
> drivers/media/platform/Makefile | 1 +
> drivers/media/platform/sunxi-cedrus/Makefile | 2 +
> drivers/media/platform/sunxi-cedrus/sunxi_cedrus.c | 248 ++++++++++
> .../platform/sunxi-cedrus/sunxi_cedrus_common.h | 86 ++++
> .../media/platform/sunxi-cedrus/sunxi_cedrus_dec.c | 544 +++++++++++++++++++++
> .../media/platform/sunxi-cedrus/sunxi_cedrus_dec.h | 33 ++
> .../media/platform/sunxi-cedrus/sunxi_cedrus_hw.c | 153 ++++++
> .../media/platform/sunxi-cedrus/sunxi_cedrus_hw.h | 32 ++
> .../platform/sunxi-cedrus/sunxi_cedrus_regs.h | 170 +++++++
> 10 files changed, 1282 insertions(+)
> create mode 100644 drivers/media/platform/sunxi-cedrus/Makefile
> create mode 100644 drivers/media/platform/sunxi-cedrus/sunxi_cedrus.c
> create mode 100644 drivers/media/platform/sunxi-cedrus/sunxi_cedrus_common.h
> create mode 100644 drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.c
> create mode 100644 drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.h
> create mode 100644 drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.c
> create mode 100644 drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.h
> create mode 100644 drivers/media/platform/sunxi-cedrus/sunxi_cedrus_regs.h
>
> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> index f25344b..92c92d3 100644
> --- a/drivers/media/platform/Kconfig
> +++ b/drivers/media/platform/Kconfig
> @@ -315,6 +315,19 @@ config VIDEO_TI_VPE
> Support for the TI VPE(Video Processing Engine) block
> found on DRA7XX SoC.
>
> +config VIDEO_SUNXI_CEDRUS
> + tristate "Sunxi CEDRUS VPU driver"
> + depends on VIDEO_DEV && VIDEO_V4L2
> + depends on ARCH_SUNXI
> + depends on HAS_DMA
> + select VIDEOBUF2_DMA_CONTIG
> + select V4L2_MEM2MEM_DEV
> + ---help---
> + Support for the VPU video codec found on Sunxi SoC.
> +
> + To compile this driver as a module, choose M here: the module
> + will be called sunxi-cedrus.
> +
> config VIDEO_TI_VPE_DEBUG
> bool "VPE debug messages"
> depends on VIDEO_TI_VPE
> diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
> index 21771c1..1419749 100644
> --- a/drivers/media/platform/Makefile
> +++ b/drivers/media/platform/Makefile
> @@ -53,6 +53,7 @@ obj-$(CONFIG_VIDEO_RENESAS_VSP1) += vsp1/
> obj-y += omap/
>
> obj-$(CONFIG_VIDEO_AM437X_VPFE) += am437x/
> +obj-$(CONFIG_VIDEO_SUNXI_CEDRUS) += sunxi-cedrus/
>
> obj-$(CONFIG_VIDEO_XILINX) += xilinx/
>
> diff --git a/drivers/media/platform/sunxi-cedrus/Makefile b/drivers/media/platform/sunxi-cedrus/Makefile
> new file mode 100644
> index 0000000..14c2f7a
> --- /dev/null
> +++ b/drivers/media/platform/sunxi-cedrus/Makefile
> @@ -0,0 +1,2 @@
> +obj-$(CONFIG_VIDEO_SUNXI_CEDRUS) += sunxi_cedrus.o sunxi_cedrus_hw.o \
> + sunxi_cedrus_dec.o
> diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus.c b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus.c
> new file mode 100644
> index 0000000..17af34c
> --- /dev/null
> +++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus.c
> @@ -0,0 +1,248 @@
> +/*
> + * Sunxi Cedrus codec driver
> + *
> + * Copyright (C) 2016 Florent Revest
> + * Florent Revest <florent.revest@...e-electrons.com>
> + *
> + * Based on vim2m
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@...iak.com>
> + * Marek Szyprowski, <m.szyprowski@...sung.com>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * 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 "sunxi_cedrus_common.h"
> +
> +#include <linux/clk.h>
> +#include <linux/module.h>
> +#include <linux/delay.h>
> +#include <linux/fs.h>
> +#include <linux/sched.h>
> +#include <linux/slab.h>
> +#include <linux/of.h>
> +
> +#include <linux/platform_device.h>
> +#include <media/v4l2-mem2mem.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-event.h>
> +#include <media/videobuf2-dma-contig.h>
> +
> +#include "sunxi_cedrus_dec.h"
> +#include "sunxi_cedrus_hw.h"
> +
> +static int sunxi_cedrus_s_ctrl(struct v4l2_ctrl *ctrl)
> +{
> + struct sunxi_cedrus_ctx *ctx =
> + container_of(ctrl->handler, struct sunxi_cedrus_ctx, hdl);
> +
> + v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
> + return -EINVAL;
> +}
> +
> +static const struct v4l2_ctrl_ops sunxi_cedrus_ctrl_ops = {
> + .s_ctrl = sunxi_cedrus_s_ctrl,
> +};
> +
> +/*
> + * File operations
> + */
> +static int sunxi_cedrus_open(struct file *file)
> +{
> + struct sunxi_cedrus_dev *dev = video_drvdata(file);
> + struct sunxi_cedrus_ctx *ctx = NULL;
> + struct v4l2_ctrl_handler *hdl;
> + int rc = 0;
> +
> + if (mutex_lock_interruptible(&dev->dev_mutex))
> + return -ERESTARTSYS;
> + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
> + if (!ctx) {
> + rc = -ENOMEM;
> + goto open_unlock;
> + }
> +
> + v4l2_fh_init(&ctx->fh, video_devdata(file));
> + file->private_data = &ctx->fh;
> + ctx->dev = dev;
> + hdl = &ctx->hdl;
> + v4l2_ctrl_handler_init(hdl, 1);
> +
> + if (hdl->error) {
> + rc = hdl->error;
> + v4l2_ctrl_handler_free(hdl);
> + goto open_unlock;
> + }
> + ctx->fh.ctrl_handler = hdl;
> + v4l2_ctrl_handler_setup(hdl);
> +
> + ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
> +
> + if (IS_ERR(ctx->fh.m2m_ctx)) {
> + rc = PTR_ERR(ctx->fh.m2m_ctx);
> +
> + v4l2_ctrl_handler_free(hdl);
> + kfree(ctx);
> + goto open_unlock;
> + }
> +
> + v4l2_fh_add(&ctx->fh);
> +
> + dev_dbg(dev->dev, "Created instance: %p, m2m_ctx: %p\n",
> + ctx, ctx->fh.m2m_ctx);
> +
> +open_unlock:
> + mutex_unlock(&dev->dev_mutex);
> + return rc;
> +}
> +
> +static int sunxi_cedrus_release(struct file *file)
> +{
> + struct sunxi_cedrus_dev *dev = video_drvdata(file);
> + struct sunxi_cedrus_ctx *ctx = container_of(file->private_data,
> + struct sunxi_cedrus_ctx, fh);
> +
> + dev_dbg(dev->dev, "Releasing instance %p\n", ctx);
> +
> + v4l2_fh_del(&ctx->fh);
> + v4l2_fh_exit(&ctx->fh);
> + v4l2_ctrl_handler_free(&ctx->hdl);
> + mutex_lock(&dev->dev_mutex);
> + v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
> + mutex_unlock(&dev->dev_mutex);
> + kfree(ctx);
> +
> + return 0;
> +}
> +
> +static const struct v4l2_file_operations sunxi_cedrus_fops = {
> + .owner = THIS_MODULE,
> + .open = sunxi_cedrus_open,
> + .release = sunxi_cedrus_release,
> + .poll = v4l2_m2m_fop_poll,
> + .unlocked_ioctl = video_ioctl2,
> + .mmap = v4l2_m2m_fop_mmap,
> +};
> +
> +static struct video_device sunxi_cedrus_viddev = {
> + .name = SUNXI_CEDRUS_NAME,
> + .vfl_dir = VFL_DIR_M2M,
> + .fops = &sunxi_cedrus_fops,
> + .ioctl_ops = &sunxi_cedrus_ioctl_ops,
> + .minor = -1,
> + .release = video_device_release_empty,
> +};
> +
> +static struct v4l2_m2m_ops m2m_ops = {
> + .device_run = device_run,
> + .job_abort = job_abort,
> +};
> +
> +static int sunxi_cedrus_probe(struct platform_device *pdev)
> +{
> + struct sunxi_cedrus_dev *dev;
> + struct video_device *vfd;
> + int ret;
> +
> + dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
> + if (!dev)
> + return -ENOMEM;
> +
> + dev->dev = &pdev->dev;
> + dev->pdev = pdev;
> +
> + ret = sunxi_cedrus_hw_probe(dev);
> + if (ret) {
> + dev_err(&pdev->dev, "sunxi_cedrus_hw_probe failed\n");
> + return ret;
> + }
> +
> + spin_lock_init(&dev->irqlock);
> +
> + ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
> + if (ret)
> + return ret;
> +
> + mutex_init(&dev->dev_mutex);
> +
> + dev->vfd = sunxi_cedrus_viddev;
> + vfd = &dev->vfd;
Don't embed video_device, but dynamically allocate it using video_device_alloc.
There are subtle problems with embedding it and new drivers shouldn't do that
anymore.
> + vfd->lock = &dev->dev_mutex;
> + vfd->v4l2_dev = &dev->v4l2_dev;
> +
> + ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
> + if (ret) {
> + v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
> + goto unreg_dev;
> + }
> +
> + video_set_drvdata(vfd, dev);
> + snprintf(vfd->name, sizeof(vfd->name), "%s", sunxi_cedrus_viddev.name);
> + v4l2_info(&dev->v4l2_dev,
> + "Device registered as /dev/video%d\n", vfd->num);
> +
> + platform_set_drvdata(pdev, dev);
> +
> + dev->m2m_dev = v4l2_m2m_init(&m2m_ops);
> + if (IS_ERR(dev->m2m_dev)) {
> + v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
> + ret = PTR_ERR(dev->m2m_dev);
> + goto err_m2m;
> + }
> +
> + return 0;
> +
> +err_m2m:
> + v4l2_m2m_release(dev->m2m_dev);
> + video_unregister_device(&dev->vfd);
> +unreg_dev:
> + v4l2_device_unregister(&dev->v4l2_dev);
> +
> + return ret;
> +}
> +
> +static int sunxi_cedrus_remove(struct platform_device *pdev)
> +{
> + struct sunxi_cedrus_dev *dev = platform_get_drvdata(pdev);
> +
> + v4l2_info(&dev->v4l2_dev, "Removing " SUNXI_CEDRUS_NAME);
> + v4l2_m2m_release(dev->m2m_dev);
> + video_unregister_device(&dev->vfd);
> + v4l2_device_unregister(&dev->v4l2_dev);
> + sunxi_cedrus_hw_remove(dev);
> +
> + return 0;
> +}
> +
> +#ifdef CONFIG_OF
> +static const struct of_device_id of_sunxi_cedrus_match[] = {
> + { .compatible = "allwinner,sun5i-a13-video-engine" },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, of_sunxi_cedrus_match);
> +#endif
> +
> +static struct platform_driver sunxi_cedrus_driver = {
> + .probe = sunxi_cedrus_probe,
> + .remove = sunxi_cedrus_remove,
> + .driver = {
> + .name = SUNXI_CEDRUS_NAME,
> + .owner = THIS_MODULE,
> + .of_match_table = of_match_ptr(of_sunxi_cedrus_match),
> + },
> +};
> +module_platform_driver(sunxi_cedrus_driver);
> +
> +MODULE_LICENSE("GPL v2");
> +MODULE_AUTHOR("Florent Revest <florent.revest@...e-electrons.com>");
> +MODULE_DESCRIPTION("Sunxi Cedrus codec driver");
> diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_common.h b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_common.h
> new file mode 100644
> index 0000000..6b8d87a
> --- /dev/null
> +++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_common.h
> @@ -0,0 +1,86 @@
> +/*
> + * Sunxi Cedrus codec driver
> + *
> + * Copyright (C) 2016 Florent Revest
> + * Florent Revest <florent.revest@...e-electrons.com>
> + *
> + * Based on vim2m
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@...iak.com>
> + * Marek Szyprowski, <m.szyprowski@...sung.com>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * 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.
> + */
> +
> +#ifndef SUNXI_CEDRUS_COMMON_H_
> +#define SUNXI_CEDRUS_COMMON_H_
> +
> +#include "sunxi_cedrus_regs.h"
> +
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-ctrls.h>
> +
> +#define SUNXI_CEDRUS_NAME "sunxi-cedrus"
> +
> +struct sunxi_cedrus_dev {
> + struct v4l2_device v4l2_dev;
> + struct video_device vfd;
> + struct platform_device *pdev;
> + struct device *dev;
> + struct v4l2_m2m_dev *m2m_dev;
> +
> + /* Mutex for device file */
> + struct mutex dev_mutex;
> + /* Spinlock for interrupt */
> + spinlock_t irqlock;
> +
> + struct clk *mod_clk;
> + struct clk *ahb_clk;
> + struct clk *ram_clk;
> +
> + struct reset_control *rstc;
> +
> + char *base;
> +};
> +
> +struct sunxi_cedrus_fmt {
> + u32 fourcc;
> + int depth;
> + u32 types;
> + unsigned int num_planes;
> +};
> +
> +struct sunxi_cedrus_ctx {
> + struct v4l2_fh fh;
> + struct sunxi_cedrus_dev *dev;
> +
> + struct sunxi_cedrus_fmt *vpu_src_fmt;
> + struct v4l2_pix_format_mplane src_fmt;
> + struct sunxi_cedrus_fmt *vpu_dst_fmt;
> + struct v4l2_pix_format_mplane dst_fmt;
> +
> + struct v4l2_ctrl_handler hdl;
> +
> + struct vb2_buffer *dst_bufs[VIDEO_MAX_FRAME];
> +};
> +
> +static inline void sunxi_cedrus_write(struct sunxi_cedrus_dev *vpu,
> + u32 val, u32 reg)
> +{
> + writel(val, vpu->base + reg);
> +}
> +
> +static inline u32 sunxi_cedrus_read(struct sunxi_cedrus_dev *vpu, u32 reg)
> +{
> + return readl(vpu->base + reg);
> +}
> +
> +#endif /* SUNXI_CEDRUS_COMMON_H_ */
> diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.c b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.c
> new file mode 100644
> index 0000000..71ef34b
> --- /dev/null
> +++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.c
> @@ -0,0 +1,544 @@
> +/*
> + * Sunxi Cedrus codec driver
> + *
> + * Copyright (C) 2016 Florent Revest
> + * Florent Revest <florent.revest@...e-electrons.com>
> + *
> + * Based on vim2m
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@...iak.com>
> + * Marek Szyprowski, <m.szyprowski@...sung.com>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * 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 "sunxi_cedrus_common.h"
> +
> +#include <media/v4l2-mem2mem.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-event.h>
> +#include <media/videobuf2-dma-contig.h>
> +
> +#include "sunxi_cedrus_dec.h"
> +#include "sunxi_cedrus_hw.h"
> +
> +/* Flags that indicate a format can be used for capture/output */
> +#define SUNXI_CEDRUS_CAPTURE BIT(0)
> +#define SUNXI_CEDRUS_OUTPUT BIT(1)
> +
> +#define SUNXI_CEDRUS_MIN_WIDTH 16U
> +#define SUNXI_CEDRUS_MIN_HEIGHT 16U
> +#define SUNXI_CEDRUS_MAX_WIDTH 3840U
> +#define SUNXI_CEDRUS_MAX_HEIGHT 2160U
> +
> +static struct sunxi_cedrus_fmt formats[] = {
> + {
> + .fourcc = V4L2_PIX_FMT_SUNXI,
> + .types = SUNXI_CEDRUS_CAPTURE,
> + .depth = 8,
> + .num_planes = 2,
> + },
> +};
> +
> +#define NUM_FORMATS ARRAY_SIZE(formats)
> +
> +static struct sunxi_cedrus_fmt *find_format(struct v4l2_format *f)
> +{
> + struct sunxi_cedrus_fmt *fmt;
> + unsigned int k;
> +
> + for (k = 0; k < NUM_FORMATS; k++) {
> + fmt = &formats[k];
> + if (fmt->fourcc == f->fmt.pix_mp.pixelformat)
> + break;
> + }
> +
> + if (k == NUM_FORMATS)
> + return NULL;
> +
> + return &formats[k];
> +}
> +
> +static inline struct sunxi_cedrus_ctx *file2ctx(struct file *file)
> +{
> + return container_of(file->private_data, struct sunxi_cedrus_ctx, fh);
> +}
> +
> +/*
> + * mem2mem callbacks
> + */
> +
> +void job_abort(void *priv)
> +{}
> +
> +/*
> + * device_run() - prepares and starts processing
> + */
> +void device_run(void *priv)
> +{
> + struct sunxi_cedrus_ctx *ctx = priv;
> + struct vb2_v4l2_buffer *in_vb, *out_vb;
> + dma_addr_t in_buf, out_luma, out_chroma;
> +
> + in_vb = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
> + out_vb = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
> +
> + v4l2_ctrl_apply_request(&ctx->hdl, in_vb->request);
> +
> + in_buf = vb2_dma_contig_plane_dma_addr(&in_vb->vb2_buf, 0);
> + out_luma = vb2_dma_contig_plane_dma_addr(&out_vb->vb2_buf, 0);
> + out_chroma = vb2_dma_contig_plane_dma_addr(&out_vb->vb2_buf, 1);
> + if (!in_buf || !out_luma || !out_chroma) {
> + v4l2_err(&ctx->dev->v4l2_dev,
> + "Acquiring kernel pointers to buffers failed\n");
> + return;
> + }
> +
> + /*
> + * The VPU is only able to handle bus addresses so we have to subtract
> + * the RAM offset to the physcal addresses
> + */
> + in_buf -= PHYS_OFFSET;
> + out_luma -= PHYS_OFFSET;
> + out_chroma -= PHYS_OFFSET;
> +
> + out_vb->vb2_buf.timestamp = in_vb->vb2_buf.timestamp;
> + if (in_vb->flags & V4L2_BUF_FLAG_TIMECODE)
> + out_vb->timecode = in_vb->timecode;
> + out_vb->field = in_vb->field;
> + out_vb->flags = in_vb->flags & (V4L2_BUF_FLAG_TIMECODE |
> + V4L2_BUF_FLAG_KEYFRAME | V4L2_BUF_FLAG_PFRAME |
> + V4L2_BUF_FLAG_BFRAME | V4L2_BUF_FLAG_TSTAMP_SRC_MASK);
> +
> + v4l2_m2m_buf_done(in_vb, VB2_BUF_STATE_ERROR);
> + v4l2_m2m_buf_done(out_vb, VB2_BUF_STATE_ERROR);
> +}
> +
> +/*
> + * video ioctls
> + */
> +static int vidioc_querycap(struct file *file, void *priv,
> + struct v4l2_capability *cap)
> +{
> + strncpy(cap->driver, SUNXI_CEDRUS_NAME, sizeof(cap->driver) - 1);
> + strncpy(cap->card, SUNXI_CEDRUS_NAME, sizeof(cap->card) - 1);
> + snprintf(cap->bus_info, sizeof(cap->bus_info),
> + "platform:%s", SUNXI_CEDRUS_NAME);
> + cap->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
> + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
Don't set this here, instead fill in device_caps in struct video_device. The
V4L2 core will fill in the device_caps and capabilities for you.
> + return 0;
> +}
> +
> +static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
> +{
> + int i, num;
> + struct sunxi_cedrus_fmt *fmt;
> +
> + num = 0;
> +
> + for (i = 0; i < NUM_FORMATS; ++i) {
> + if (formats[i].types & type) {
> + /* index-th format of type type found ? */
> + if (num == f->index)
> + break;
> + /*
> + * Correct type but haven't reached our index yet,
> + * just increment per-type index
> + */
> + ++num;
> + }
> + }
> +
> + if (i < NUM_FORMATS) {
> + /* Format found */
> + fmt = &formats[i];
> + f->pixelformat = fmt->fourcc;
> + return 0;
> + }
> +
> + /* Format not found */
> + return -EINVAL;
> +}
> +
> +static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_fmtdesc *f)
> +{
> + return enum_fmt(f, SUNXI_CEDRUS_CAPTURE);
> +}
> +
> +static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_fmtdesc *f)
> +{
> + return enum_fmt(f, SUNXI_CEDRUS_OUTPUT);
> +}
> +
> +static int vidioc_g_fmt(struct sunxi_cedrus_ctx *ctx, struct v4l2_format *f)
> +{
> + switch (f->type) {
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> + f->fmt.pix_mp = ctx->dst_fmt;
> + break;
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> + f->fmt.pix_mp = ctx->src_fmt;
> + break;
> + default:
> + dev_dbg(ctx->dev->dev, "invalid buf type\n");
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + return vidioc_g_fmt(file2ctx(file), f);
> +}
> +
> +static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + return vidioc_g_fmt(file2ctx(file), f);
> +}
> +
> +static int vidioc_try_fmt(struct v4l2_format *f, struct sunxi_cedrus_fmt *fmt)
> +{
> + int i;
> + __u32 bpl;
> +
> + f->fmt.pix_mp.field = V4L2_FIELD_NONE;
> + f->fmt.pix_mp.num_planes = fmt->num_planes;
> +
> + switch (f->type) {
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> + if (f->fmt.pix_mp.plane_fmt[0].sizeimage == 0)
> + return -EINVAL;
> +
> + f->fmt.pix_mp.plane_fmt[0].bytesperline = 0;
> + break;
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> + /* Limit to hardware min/max. */
> + f->fmt.pix_mp.width = clamp(f->fmt.pix_mp.width,
> + SUNXI_CEDRUS_MIN_WIDTH, SUNXI_CEDRUS_MAX_WIDTH);
> + f->fmt.pix_mp.height = clamp(f->fmt.pix_mp.height,
> + SUNXI_CEDRUS_MIN_HEIGHT, SUNXI_CEDRUS_MAX_HEIGHT);
> +
> + for (i = 0; i < f->fmt.pix_mp.num_planes; ++i) {
> + bpl = (f->fmt.pix_mp.width * fmt->depth) >> 3;
> + f->fmt.pix_mp.plane_fmt[i].bytesperline = bpl;
> + f->fmt.pix_mp.plane_fmt[i].sizeimage =
> + f->fmt.pix_mp.height * bpl;
> + }
> + break;
> + }
> + return 0;
> +}
> +
> +static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct sunxi_cedrus_fmt *fmt;
> + struct sunxi_cedrus_ctx *ctx = file2ctx(file);
> +
> + fmt = find_format(f);
> + if (!fmt) {
> + f->fmt.pix_mp.pixelformat = formats[0].fourcc;
> + fmt = find_format(f);
> + }
> + if (!(fmt->types & SUNXI_CEDRUS_CAPTURE)) {
> + v4l2_err(&ctx->dev->v4l2_dev,
> + "Fourcc format (0x%08x) invalid.\n",
> + f->fmt.pix_mp.pixelformat);
> + return -EINVAL;
> + }
> +
> + return vidioc_try_fmt(f, fmt);
> +}
> +
> +static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct sunxi_cedrus_fmt *fmt;
> + struct sunxi_cedrus_ctx *ctx = file2ctx(file);
> +
> + fmt = find_format(f);
> + if (!fmt) {
> + f->fmt.pix_mp.pixelformat = formats[0].fourcc;
> + fmt = find_format(f);
> + }
> + if (!(fmt->types & SUNXI_CEDRUS_OUTPUT)) {
> + v4l2_err(&ctx->dev->v4l2_dev,
> + "Fourcc format (0x%08x) invalid.\n",
> + f->fmt.pix_mp.pixelformat);
> + return -EINVAL;
> + }
> +
> + return vidioc_try_fmt(f, fmt);
> +}
> +
> +static int vidioc_s_fmt(struct sunxi_cedrus_ctx *ctx, struct v4l2_format *f)
> +{
> + struct sunxi_cedrus_dev *dev = ctx->dev;
> + struct v4l2_pix_format_mplane *pix_fmt_mp = &f->fmt.pix_mp;
> + struct sunxi_cedrus_fmt *fmt;
> + int i, ret = 0;
> +
> + switch (f->type) {
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> + ctx->vpu_src_fmt = find_format(f);
> + ctx->src_fmt = *pix_fmt_mp;
> + break;
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> + fmt = find_format(f);
> + ctx->vpu_dst_fmt = fmt;
> +
> + for (i = 0; i < fmt->num_planes; ++i) {
> + pix_fmt_mp->plane_fmt[i].bytesperline =
> + pix_fmt_mp->width * fmt->depth;
> + pix_fmt_mp->plane_fmt[i].sizeimage =
> + pix_fmt_mp->plane_fmt[i].bytesperline
> + * pix_fmt_mp->height;
> + }
> + ctx->dst_fmt = *pix_fmt_mp;
> + break;
> + default:
> + dev_dbg(ctx->dev->dev, "invalid buf type\n");
> + return -EINVAL;
> + }
> +
> + return ret;
> +}
> +
> +static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + int ret;
> +
> + ret = vidioc_try_fmt_vid_cap(file, priv, f);
> + if (ret)
> + return ret;
> +
> + return vidioc_s_fmt(file2ctx(file), f);
> +}
> +
> +static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + int ret;
> +
> + ret = vidioc_try_fmt_vid_out(file, priv, f);
> + if (ret)
> + return ret;
> +
> + ret = vidioc_s_fmt(file2ctx(file), f);
> + return ret;
> +}
> +
> +const struct v4l2_ioctl_ops sunxi_cedrus_ioctl_ops = {
> + .vidioc_querycap = vidioc_querycap,
> +
> + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
> + .vidioc_g_fmt_vid_cap_mplane = vidioc_g_fmt_vid_cap,
> + .vidioc_try_fmt_vid_cap_mplane = vidioc_try_fmt_vid_cap,
> + .vidioc_s_fmt_vid_cap_mplane = vidioc_s_fmt_vid_cap,
> +
> + .vidioc_enum_fmt_vid_out_mplane = vidioc_enum_fmt_vid_out,
> + .vidioc_g_fmt_vid_out_mplane = vidioc_g_fmt_vid_out,
> + .vidioc_try_fmt_vid_out_mplane = vidioc_try_fmt_vid_out,
> + .vidioc_s_fmt_vid_out_mplane = vidioc_s_fmt_vid_out,
> +
> + .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
> + .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
> + .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
> + .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
> + .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
> + .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
> + .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
> +
> + .vidioc_streamon = v4l2_m2m_ioctl_streamon,
> + .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
> +
> + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
> + .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
> +};
> +
> +/*
> + * Queue operations
> + */
> +
> +static int sunxi_cedrus_queue_setup(struct vb2_queue *vq, unsigned int *nbufs,
> + unsigned int *nplanes, unsigned int sizes[],
> + struct device *alloc_devs[])
> +{
> + struct sunxi_cedrus_ctx *ctx = vb2_get_drv_priv(vq);
> +
> + if (*nbufs < 1)
> + *nbufs = 1;
> +
> + if (*nbufs > VIDEO_MAX_FRAME)
> + *nbufs = VIDEO_MAX_FRAME;
> +
> + switch (vq->type) {
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> + *nplanes = ctx->vpu_src_fmt->num_planes;
> +
> + sizes[0] = ctx->src_fmt.plane_fmt[0].sizeimage;
> + break;
> +
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> + *nplanes = ctx->vpu_dst_fmt->num_planes;
> +
> + sizes[0] = round_up(ctx->dst_fmt.plane_fmt[0].sizeimage, 8);
> + sizes[1] = sizes[0];
> + break;
> +
> + default:
> + dev_dbg(ctx->dev->dev, "invalid queue type: %d\n", vq->type);
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int sunxi_cedrus_buf_init(struct vb2_buffer *vb)
> +{
> + struct vb2_queue *vq = vb->vb2_queue;
> + struct sunxi_cedrus_ctx *ctx = container_of(vq->drv_priv,
> + struct sunxi_cedrus_ctx, fh);
> +
> + if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
> + ctx->dst_bufs[vb->index] = vb;
> +
> + return 0;
> +}
> +
> +static void sunxi_cedrus_buf_cleanup(struct vb2_buffer *vb)
> +{
> + struct vb2_queue *vq = vb->vb2_queue;
> + struct sunxi_cedrus_ctx *ctx = container_of(vq->drv_priv,
> + struct sunxi_cedrus_ctx, fh);
> +
> + if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
> + ctx->dst_bufs[vb->index] = NULL;
> +}
> +
> +static int sunxi_cedrus_buf_prepare(struct vb2_buffer *vb)
> +{
> + struct sunxi_cedrus_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
> + struct vb2_queue *vq = vb->vb2_queue;
> + int i;
> +
> + dev_dbg(ctx->dev->dev, "type: %d\n", vb->vb2_queue->type);
> +
> + switch (vq->type) {
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
> + if (vb2_plane_size(vb, 0)
> + < ctx->src_fmt.plane_fmt[0].sizeimage) {
> + dev_dbg(ctx->dev->dev, "plane too small for output\n");
> + return -EINVAL;
> + }
> + break;
> +
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
> + for (i = 0; i < ctx->vpu_dst_fmt->num_planes; ++i) {
> + if (vb2_plane_size(vb, i)
> + < ctx->dst_fmt.plane_fmt[i].sizeimage) {
> + dev_dbg(ctx->dev->dev,
> + "plane %d too small for capture\n", i);
> + break;
> + }
> + }
> +
> + if (i != ctx->vpu_dst_fmt->num_planes)
> + return -EINVAL;
> + break;
> +
> + default:
> + dev_dbg(ctx->dev->dev, "invalid queue type: %d\n", vq->type);
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static void sunxi_cedrus_stop_streaming(struct vb2_queue *q)
> +{
> + struct sunxi_cedrus_ctx *ctx = vb2_get_drv_priv(q);
> + struct vb2_v4l2_buffer *vbuf;
> + unsigned long flags;
> +
> + for (;;) {
> + if (V4L2_TYPE_IS_OUTPUT(q->type))
> + vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
> + else
> + vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
> + if (!vbuf)
> + return;
> + spin_lock_irqsave(&ctx->dev->irqlock, flags);
> + v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
> + spin_unlock_irqrestore(&ctx->dev->irqlock, flags);
> + }
> +}
> +
> +static void sunxi_cedrus_buf_queue(struct vb2_buffer *vb)
> +{
> + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
> + struct sunxi_cedrus_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
> +
> + v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
> +}
> +
> +static struct vb2_ops sunxi_cedrus_qops = {
> + .queue_setup = sunxi_cedrus_queue_setup,
> + .buf_prepare = sunxi_cedrus_buf_prepare,
> + .buf_init = sunxi_cedrus_buf_init,
> + .buf_cleanup = sunxi_cedrus_buf_cleanup,
> + .buf_queue = sunxi_cedrus_buf_queue,
> + .stop_streaming = sunxi_cedrus_stop_streaming,
> + .wait_prepare = vb2_ops_wait_prepare,
> + .wait_finish = vb2_ops_wait_finish,
> +};
> +
> +int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
> +{
> + struct sunxi_cedrus_ctx *ctx = priv;
> + int ret;
> +
> + src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
> + src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
> + src_vq->drv_priv = ctx;
> + src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
> + src_vq->ops = &sunxi_cedrus_qops;
> + src_vq->mem_ops = &vb2_dma_contig_memops;
> + src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
> + src_vq->lock = &ctx->dev->dev_mutex;
> + src_vq->v4l2_allow_requests = true;
> + src_vq->dev = ctx->dev->dev;
> +
> + ret = vb2_queue_init(src_vq);
> + if (ret)
> + return ret;
> +
> + dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
> + dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
> + dst_vq->drv_priv = ctx;
> + dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
> + dst_vq->ops = &sunxi_cedrus_qops;
> + dst_vq->mem_ops = &vb2_dma_contig_memops;
> + dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
> + dst_vq->lock = &ctx->dev->dev_mutex;
> + dst_vq->v4l2_allow_requests = true;
> + dst_vq->dev = ctx->dev->dev;
> +
> + return vb2_queue_init(dst_vq);
> +}
> diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.h b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.h
> new file mode 100644
> index 0000000..f0ac921
> --- /dev/null
> +++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_dec.h
> @@ -0,0 +1,33 @@
> +/*
> + * Sunxi Cedrus codec driver
> + *
> + * Copyright (C) 2016 Florent Revest
> + * Florent Revest <florent.revest@...e-electrons.com>
> + *
> + * Based on vim2m
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@...iak.com>
> + * Marek Szyprowski, <m.szyprowski@...sung.com>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * 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.
> + */
> +
> +#ifndef SUNXI_CEDRUS_DEC_H_
> +#define SUNXI_CEDRUS_DEC_H_
> +
> +int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq);
> +
> +void job_abort(void *priv);
> +void device_run(void *priv);
> +
> +extern const struct v4l2_ioctl_ops sunxi_cedrus_ioctl_ops;
> +
> +#endif /* SUNXI_CEDRUS_DEC_H_ */
> diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.c b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.c
> new file mode 100644
> index 0000000..72b9df4
> --- /dev/null
> +++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.c
> @@ -0,0 +1,153 @@
> +/*
> + * Sunxi Cedrus codec driver
> + *
> + * Copyright (C) 2016 Florent Revest
> + * Florent Revest <florent.revest@...e-electrons.com>
> + *
> + * Based on vim2m
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@...iak.com>
> + * Marek Szyprowski, <m.szyprowski@...sung.com>
> + *
> + * And reverse engineering efforts of the 'Cedrus' project
> + * Copyright (c) 2013-2014 Jens Kuske <jenskuske@...il.com>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * 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 "sunxi_cedrus_common.h"
> +
> +#include <linux/clk.h>
> +#include <linux/interrupt.h>
> +#include <linux/dma-mapping.h>
> +#include <linux/platform_device.h>
> +#include <linux/of_reserved_mem.h>
> +#include <linux/reset.h>
> +
> +#include <media/v4l2-mem2mem.h>
> +#include <media/videobuf2-core.h>
> +
> +/*
> + * Interrupt handlers.
> + */
> +
> +static irqreturn_t sunxi_cedrus_ve_irq(int irq, void *dev_id)
> +{
> + struct sunxi_cedrus_dev *vpu = dev_id;
> + struct sunxi_cedrus_ctx *curr_ctx;
> + struct vb2_v4l2_buffer *src_vb, *dst_vb;
> + int val;
> + unsigned long flags;
> +
> + curr_ctx = v4l2_m2m_get_curr_priv(vpu->m2m_dev);
> +
> + if (!curr_ctx) {
> + pr_err("Instance released before the end of transaction\n");
> + return IRQ_HANDLED;
> + }
> +
> + src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
> + dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
> +
> + spin_lock_irqsave(&vpu->irqlock, flags);
> + v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_ERROR);
> + v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_ERROR);
> + spin_unlock_irqrestore(&vpu->irqlock, flags);
> +
> + v4l2_m2m_job_finish(vpu->m2m_dev, curr_ctx->fh.m2m_ctx);
> +
> + return IRQ_HANDLED;
> +}
> +
> +/*
> + * Initialization/clean-up.
> + */
> +
> +int sunxi_cedrus_hw_probe(struct sunxi_cedrus_dev *vpu)
> +{
> + struct resource *res;
> + int irq_dec;
> + int ret;
> +
> + irq_dec = platform_get_irq(vpu->pdev, 0);
> + if (irq_dec <= 0) {
> + dev_err(vpu->dev, "could not get ve IRQ\n");
> + return -ENXIO;
> + }
> + ret = devm_request_irq(vpu->dev, irq_dec, sunxi_cedrus_ve_irq, 0,
> + dev_name(vpu->dev), vpu);
> + if (ret) {
> + dev_err(vpu->dev, "could not request ve IRQ\n");
> + return -ENXIO;
> + }
> +
> + ret = of_reserved_mem_device_init(vpu->dev);
> + if (ret) {
> + dev_err(vpu->dev, "could not reserve memory\n");
> + return -ENODEV;
> + }
> +
> + vpu->ahb_clk = devm_clk_get(vpu->dev, "ahb");
> + if (IS_ERR(vpu->ahb_clk)) {
> + dev_err(vpu->dev, "failed to get ahb clock\n");
> + return PTR_ERR(vpu->ahb_clk);
> + }
> + vpu->mod_clk = devm_clk_get(vpu->dev, "mod");
> + if (IS_ERR(vpu->mod_clk)) {
> + dev_err(vpu->dev, "failed to get mod clock\n");
> + return PTR_ERR(vpu->mod_clk);
> + }
> + vpu->ram_clk = devm_clk_get(vpu->dev, "ram");
> + if (IS_ERR(vpu->ram_clk)) {
> + dev_err(vpu->dev, "failed to get ram clock\n");
> + return PTR_ERR(vpu->ram_clk);
> + }
> +
> + vpu->rstc = devm_reset_control_get(vpu->dev, NULL);
> +
> + res = platform_get_resource(vpu->pdev, IORESOURCE_MEM, 0);
> + vpu->base = devm_ioremap_resource(vpu->dev, res);
> + if (!vpu->base)
> + dev_err(vpu->dev, "could not maps MACC registers\n");
> +
> + ret = clk_prepare_enable(vpu->ahb_clk);
> + if (ret) {
> + dev_err(vpu->dev, "could not enable ahb clock\n");
> + return -EFAULT;
> + }
> + ret = clk_prepare_enable(vpu->mod_clk);
> + if (ret) {
> + clk_disable_unprepare(vpu->ahb_clk);
> + dev_err(vpu->dev, "could not enable mod clock\n");
> + return -EFAULT;
> + }
> + ret = clk_prepare_enable(vpu->ram_clk);
> + if (ret) {
> + clk_disable_unprepare(vpu->mod_clk);
> + clk_disable_unprepare(vpu->ahb_clk);
> + dev_err(vpu->dev, "could not enable ram clock\n");
> + return -EFAULT;
> + }
> +
> + reset_control_assert(vpu->rstc);
> + reset_control_deassert(vpu->rstc);
> +
> + return 0;
> +}
> +
> +void sunxi_cedrus_hw_remove(struct sunxi_cedrus_dev *vpu)
> +{
> + clk_disable_unprepare(vpu->ram_clk);
> + clk_disable_unprepare(vpu->mod_clk);
> + clk_disable_unprepare(vpu->ahb_clk);
> +
> + of_reserved_mem_device_release(vpu->dev);
> +}
> diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.h b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.h
> new file mode 100644
> index 0000000..3c9199b
> --- /dev/null
> +++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_hw.h
> @@ -0,0 +1,32 @@
> +/*
> + * Sunxi Cedrus codec driver
> + *
> + * Copyright (C) 2016 Florent Revest
> + * Florent Revest <florent.revest@...e-electrons.com>
> + *
> + * Based on vim2m
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel@...iak.com>
> + * Marek Szyprowski, <m.szyprowski@...sung.com>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * 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.
> + */
> +
> +#ifndef SUNXI_CEDRUS_HW_H_
> +#define SUNXI_CEDRUS_HW_H_
> +
> +struct sunxi_cedrus_dev;
> +struct sunxi_cedrus_ctx;
> +
> +int sunxi_cedrus_hw_probe(struct sunxi_cedrus_dev *vpu);
> +void sunxi_cedrus_hw_remove(struct sunxi_cedrus_dev *vpu);
> +
> +#endif /* SUNXI_CEDRUS_HW_H_ */
> diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_regs.h b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_regs.h
> new file mode 100644
> index 0000000..7384daa
> --- /dev/null
> +++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_regs.h
> @@ -0,0 +1,170 @@
> +/*
> + * Sunxi Cedrus codec driver
> + *
> + * Copyright (C) 2016 Florent Revest
> + * Florent Revest <florent.revest@...e-electrons.com>
> + *
> + * Based on Cedrus
> + *
> + * Copyright (c) 2013 Jens Kuske <jenskuske@...il.com>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * 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.
> + */
> +
> +#ifndef SUNXI_CEDRUS_REGS_H
> +#define SUNXI_CEDRUS_REGS_H
> +
> +/*
> + * For more information consult http://linux-sunxi.org/VE_Register_guide
> + */
> +
> +/* Special registers values */
> +
> +/* VE_CTRL:
> + * The first 3 bits indicate the engine (0 for MPEG, 1 for H264, b for AVC...)
> + * The 16th and 17th bits indicate the memory type (3 for DDR3 32 bits)
> + * The 20th bit is unknown but needed
> + */
> +#define VE_CTRL_MPEG 0x130000
> +#define VE_CTRL_H264 0x130001
> +#define VE_CTRL_AVC 0x13000b
> +#define VE_CTRL_REINIT 0x130007
> +
> +/* VE_MPEG_CTRL:
> + * The bit 3 (0x8) is used to enable IRQs
> + * The other bits are unknown but needed
> + */
> +#define VE_MPEG_CTRL_MPEG2 0x800001b8
> +#define VE_MPEG_CTRL_MPEG4 (0x80084118 | BIT(7))
> +#define VE_MPEG_CTRL_MPEG4_P (VE_MPEG_CTRL_MPEG4 | BIT(12))
> +
> +/* VE_MPEG_VLD_ADDR:
> + * The bits 27 to 4 are used for the address
> + * The bits 31 to 28 (0x7) are used to select the MPEG or JPEG engine
> + */
> +#define VE_MPEG_VLD_ADDR_VAL(x) ((x & 0x0ffffff0) | (x >> 28) | (0x7 << 28))
> +
> +/* VE_MPEG_TRIGGER:
> + * The first three bits are used to trigger the engine
> + * The bits 24 to 26 are used to select the input format (1 for MPEG1, 2 for
> + * MPEG2, 4 for MPEG4)
> + * The bit 21 (0x8) is used to disable bitstream error handling
> + *
> + * In MPEG4 the w*h value is somehow used for an offset, unknown but needed
> + */
> +#define VE_TRIG_MPEG1 0x8100000f
> +#define VE_TRIG_MPEG2 0x8200000f
> +#define VE_TRIG_MPEG4(w, h) (0x8400000d | ((w * h) << 8))
> +
> +/* VE_MPEG_SDROT_CTRL:
> + * The bit 8 at zero is used to disable x downscaling
> + * The bit 10 at 0 is used to disable y downscaling
> + * The other bits are unknown but needed
> + */
> +#define VE_NO_SDROT_CTRL 0x40620000
> +
> +/* Decent size fo video buffering verifier */
> +#define VBV_SIZE (1024 * 1024)
> +
> +/* Registers addresses */
> +#define VE_CTRL 0x000
> +#define VE_VERSION 0x0f0
> +
> +#define VE_MPEG_PIC_HDR 0x100
> +#define VE_MPEG_VOP_HDR 0x104
> +#define VE_MPEG_SIZE 0x108
> +#define VE_MPEG_FRAME_SIZE 0x10c
> +#define VE_MPEG_MBA 0x110
> +#define VE_MPEG_CTRL 0x114
> +#define VE_MPEG_TRIGGER 0x118
> +#define VE_MPEG_STATUS 0x11c
> +#define VE_MPEG_TRBTRD_FIELD 0x120
> +#define VE_MPEG_TRBTRD_FRAME 0x124
> +#define VE_MPEG_VLD_ADDR 0x128
> +#define VE_MPEG_VLD_OFFSET 0x12c
> +#define VE_MPEG_VLD_LEN 0x130
> +#define VE_MPEG_VLD_END 0x134
> +#define VE_MPEG_MBH_ADDR 0x138
> +#define VE_MPEG_DCAC_ADDR 0x13c
> +#define VE_MPEG_NCF_ADDR 0x144
> +#define VE_MPEG_REC_LUMA 0x148
> +#define VE_MPEG_REC_CHROMA 0x14c
> +#define VE_MPEG_FWD_LUMA 0x150
> +#define VE_MPEG_FWD_CHROMA 0x154
> +#define VE_MPEG_BACK_LUMA 0x158
> +#define VE_MPEG_BACK_CHROMA 0x15c
> +#define VE_MPEG_IQ_MIN_INPUT 0x180
> +#define VE_MPEG_QP_INPUT 0x184
> +#define VE_MPEG_JPEG_SIZE 0x1b8
> +#define VE_MPEG_JPEG_RES_INT 0x1c0
> +#define VE_MPEG_ERROR 0x1c4
> +#define VE_MPEG_CTR_MB 0x1c8
> +#define VE_MPEG_ROT_LUMA 0x1cc
> +#define VE_MPEG_ROT_CHROMA 0x1d0
> +#define VE_MPEG_SDROT_CTRL 0x1d4
> +#define VE_MPEG_RAM_WRITE_PTR 0x1e0
> +#define VE_MPEG_RAM_WRITE_DATA 0x1e4
> +
> +#define VE_H264_FRAME_SIZE 0x200
> +#define VE_H264_PIC_HDR 0x204
> +#define VE_H264_SLICE_HDR 0x208
> +#define VE_H264_SLICE_HDR2 0x20c
> +#define VE_H264_PRED_WEIGHT 0x210
> +#define VE_H264_QP_PARAM 0x21c
> +#define VE_H264_CTRL 0x220
> +#define VE_H264_TRIGGER 0x224
> +#define VE_H264_STATUS 0x228
> +#define VE_H264_CUR_MB_NUM 0x22c
> +#define VE_H264_VLD_ADDR 0x230
> +#define VE_H264_VLD_OFFSET 0x234
> +#define VE_H264_VLD_LEN 0x238
> +#define VE_H264_VLD_END 0x23c
> +#define VE_H264_SDROT_CTRL 0x240
> +#define VE_H264_OUTPUT_FRAME_IDX 0x24c
> +#define VE_H264_EXTRA_BUFFER1 0x250
> +#define VE_H264_EXTRA_BUFFER2 0x254
> +#define VE_H264_BASIC_BITS 0x2dc
> +#define VE_H264_RAM_WRITE_PTR 0x2e0
> +#define VE_H264_RAM_WRITE_DATA 0x2e4
> +
> +#define VE_SRAM_H264_PRED_WEIGHT_TABLE 0x000
> +#define VE_SRAM_H264_FRAMEBUFFER_LIST 0x400
> +#define VE_SRAM_H264_REF_LIST0 0x640
> +#define VE_SRAM_H264_REF_LIST1 0x664
> +#define VE_SRAM_H264_SCALING_LISTS 0x800
> +
> +#define VE_ISP_INPUT_SIZE 0xa00
> +#define VE_ISP_INPUT_STRIDE 0xa04
> +#define VE_ISP_CTRL 0xa08
> +#define VE_ISP_INPUT_LUMA 0xa78
> +#define VE_ISP_INPUT_CHROMA 0xa7c
> +
> +#define VE_AVC_PARAM 0xb04
> +#define VE_AVC_QP 0xb08
> +#define VE_AVC_MOTION_EST 0xb10
> +#define VE_AVC_CTRL 0xb14
> +#define VE_AVC_TRIGGER 0xb18
> +#define VE_AVC_STATUS 0xb1c
> +#define VE_AVC_BASIC_BITS 0xb20
> +#define VE_AVC_UNK_BUF 0xb60
> +#define VE_AVC_VLE_ADDR 0xb80
> +#define VE_AVC_VLE_END 0xb84
> +#define VE_AVC_VLE_OFFSET 0xb88
> +#define VE_AVC_VLE_MAX 0xb8c
> +#define VE_AVC_VLE_LENGTH 0xb90
> +#define VE_AVC_REF_LUMA 0xba0
> +#define VE_AVC_REF_CHROMA 0xba4
> +#define VE_AVC_REC_LUMA 0xbb0
> +#define VE_AVC_REC_CHROMA 0xbb4
> +#define VE_AVC_REF_SLUMA 0xbb8
> +#define VE_AVC_REC_SLUMA 0xbbc
> +#define VE_AVC_MB_INFO 0xbc0
> +
> +#endif /* SUNXI_CEDRUS_REGS_H */
>
Regards,
Hans
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