[PATCH v9 5/9] media: platform: Add Cedrus VPU decoder driver
Mauro Carvalho Chehab
mchehab+samsung at kernel.org
Tue Sep 11 15:24:39 UTC 2018
Em Fri, 7 Sep 2018 00:24:38 +0200
Paul Kocialkowski <contact at paulk.fr> escreveu:
> From: Paul Kocialkowski <paul.kocialkowski at bootlin.com>
>
> This introduces the Cedrus VPU driver that supports the VPU found in
> Allwinner SoCs, also known as Video Engine. It is implemented through
> a V4L2 M2M decoder device and a media device (used for media requests).
> So far, it only supports MPEG-2 decoding.
>
> Since this VPU is stateless, synchronization with media requests is
> required in order to ensure consistency between frame headers that
> contain metadata about the frame to process and the raw slice data that
> is used to generate the frame.
>
> This driver was made possible thanks to the long-standing effort
> carried out by the linux-sunxi community in the interest of reverse
> engineering, documenting and implementing support for the Allwinner VPU.
>
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski at bootlin.com>
> Acked-by: Maxime Ripard <maxime.ripard at bootlin.com>
> ---
> MAINTAINERS | 7 +
> drivers/staging/media/Kconfig | 2 +
> drivers/staging/media/Makefile | 1 +
> drivers/staging/media/sunxi/Kconfig | 15 +
> drivers/staging/media/sunxi/Makefile | 1 +
> drivers/staging/media/sunxi/cedrus/Kconfig | 14 +
> drivers/staging/media/sunxi/cedrus/Makefile | 3 +
> drivers/staging/media/sunxi/cedrus/cedrus.c | 422 ++++++++++++++
> drivers/staging/media/sunxi/cedrus/cedrus.h | 165 ++++++
> .../staging/media/sunxi/cedrus/cedrus_dec.c | 70 +++
> .../staging/media/sunxi/cedrus/cedrus_dec.h | 27 +
> .../staging/media/sunxi/cedrus/cedrus_hw.c | 322 +++++++++++
> .../staging/media/sunxi/cedrus/cedrus_hw.h | 30 +
> .../staging/media/sunxi/cedrus/cedrus_mpeg2.c | 237 ++++++++
> .../staging/media/sunxi/cedrus/cedrus_regs.h | 233 ++++++++
> .../staging/media/sunxi/cedrus/cedrus_video.c | 544 ++++++++++++++++++
> .../staging/media/sunxi/cedrus/cedrus_video.h | 30 +
> 17 files changed, 2123 insertions(+)
> create mode 100644 drivers/staging/media/sunxi/Kconfig
> create mode 100644 drivers/staging/media/sunxi/Makefile
> create mode 100644 drivers/staging/media/sunxi/cedrus/Kconfig
> create mode 100644 drivers/staging/media/sunxi/cedrus/Makefile
> create mode 100644 drivers/staging/media/sunxi/cedrus/cedrus.c
> create mode 100644 drivers/staging/media/sunxi/cedrus/cedrus.h
> create mode 100644 drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> create mode 100644 drivers/staging/media/sunxi/cedrus/cedrus_dec.h
> create mode 100644 drivers/staging/media/sunxi/cedrus/cedrus_hw.c
> create mode 100644 drivers/staging/media/sunxi/cedrus/cedrus_hw.h
> create mode 100644 drivers/staging/media/sunxi/cedrus/cedrus_mpeg2.c
> create mode 100644 drivers/staging/media/sunxi/cedrus/cedrus_regs.h
> create mode 100644 drivers/staging/media/sunxi/cedrus/cedrus_video.c
> create mode 100644 drivers/staging/media/sunxi/cedrus/cedrus_video.h
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index a5b256b25905..6d69f3ad1aa9 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -663,6 +663,13 @@ L: linux-crypto at vger.kernel.org
> S: Maintained
> F: drivers/crypto/sunxi-ss/
>
> +ALLWINNER VPU DRIVER
> +M: Maxime Ripard <maxime.ripard at bootlin.com>
> +M: Paul Kocialkowski <paul.kocialkowski at bootlin.com>
> +L: linux-media at vger.kernel.org
> +S: Maintained
> +F: drivers/staging/media/sunxi/cedrus/
> +
> ALPHA PORT
> M: Richard Henderson <rth at twiddle.net>
> M: Ivan Kokshaysky <ink at jurassic.park.msu.ru>
> diff --git a/drivers/staging/media/Kconfig b/drivers/staging/media/Kconfig
> index db5cf67047ad..b3620a8f2d9f 100644
> --- a/drivers/staging/media/Kconfig
> +++ b/drivers/staging/media/Kconfig
> @@ -31,6 +31,8 @@ source "drivers/staging/media/mt9t031/Kconfig"
>
> source "drivers/staging/media/omap4iss/Kconfig"
>
> +source "drivers/staging/media/sunxi/Kconfig"
> +
> source "drivers/staging/media/tegra-vde/Kconfig"
>
> source "drivers/staging/media/zoran/Kconfig"
> diff --git a/drivers/staging/media/Makefile b/drivers/staging/media/Makefile
> index 503fbe47fa58..42948f805548 100644
> --- a/drivers/staging/media/Makefile
> +++ b/drivers/staging/media/Makefile
> @@ -5,5 +5,6 @@ obj-$(CONFIG_SOC_CAMERA_IMX074) += imx074/
> obj-$(CONFIG_SOC_CAMERA_MT9T031) += mt9t031/
> obj-$(CONFIG_VIDEO_DM365_VPFE) += davinci_vpfe/
> obj-$(CONFIG_VIDEO_OMAP4) += omap4iss/
> +obj-$(CONFIG_VIDEO_SUNXI) += sunxi/
> obj-$(CONFIG_TEGRA_VDE) += tegra-vde/
> obj-$(CONFIG_VIDEO_ZORAN) += zoran/
> diff --git a/drivers/staging/media/sunxi/Kconfig b/drivers/staging/media/sunxi/Kconfig
> new file mode 100644
> index 000000000000..c78d92240ceb
> --- /dev/null
> +++ b/drivers/staging/media/sunxi/Kconfig
> @@ -0,0 +1,15 @@
> +config VIDEO_SUNXI
> + bool "Allwinner sunXi family Video Devices"
> + depends on ARCH_SUNXI || COMPILE_TEST
> + help
> + If you have an Allwinner SoC based on the sunXi family, say Y.
> +
> + Note that this option doesn't include new drivers in the
> + kernel: saying N will just cause Kconfig to skip all the
> + questions about Allwinner media devices.
> +
> +if VIDEO_SUNXI
> +
> +source "drivers/staging/media/sunxi/cedrus/Kconfig"
> +
> +endif
> diff --git a/drivers/staging/media/sunxi/Makefile b/drivers/staging/media/sunxi/Makefile
> new file mode 100644
> index 000000000000..cee2846c3ecf
> --- /dev/null
> +++ b/drivers/staging/media/sunxi/Makefile
> @@ -0,0 +1 @@
> +obj-$(CONFIG_VIDEO_SUNXI_CEDRUS) += cedrus/
> diff --git a/drivers/staging/media/sunxi/cedrus/Kconfig b/drivers/staging/media/sunxi/cedrus/Kconfig
> new file mode 100644
> index 000000000000..afd7d7ee0388
> --- /dev/null
> +++ b/drivers/staging/media/sunxi/cedrus/Kconfig
> @@ -0,0 +1,14 @@
> +config VIDEO_SUNXI_CEDRUS
> + tristate "Allwinner Cedrus VPU driver"
> + depends on VIDEO_DEV && VIDEO_V4L2 && MEDIA_CONTROLLER
> + depends on HAS_DMA
> + depends on OF
> + select VIDEOBUF2_DMA_CONTIG
> + select MEDIA_REQUEST_API
> + select V4L2_MEM2MEM_DEV
> + help
> + Support for the VPU found in Allwinner SoCs, also known as the Cedar
> + video engine.
> +
> + To compile this driver as a module, choose M here: the module
> + will be called sunxi-cedrus.
> diff --git a/drivers/staging/media/sunxi/cedrus/Makefile b/drivers/staging/media/sunxi/cedrus/Makefile
> new file mode 100644
> index 000000000000..e9dc68b7bcb6
> --- /dev/null
> +++ b/drivers/staging/media/sunxi/cedrus/Makefile
> @@ -0,0 +1,3 @@
> +obj-$(CONFIG_VIDEO_SUNXI_CEDRUS) += sunxi-cedrus.o
> +
> +sunxi-cedrus-y = cedrus.o cedrus_video.o cedrus_hw.o cedrus_dec.o cedrus_mpeg2.o
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.c b/drivers/staging/media/sunxi/cedrus/cedrus.c
> new file mode 100644
> index 000000000000..09ab1b732c31
> --- /dev/null
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus.c
> @@ -0,0 +1,422 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Cedrus VPU driver
> + *
> + * Copyright (C) 2016 Florent Revest <florent.revest at free-electrons.com>
> + * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski at bootlin.com>
> + * Copyright (C) 2018 Bootlin
> + *
> + * Based on the vim2m driver, that is:
> + *
> + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
> + * Pawel Osciak, <pawel at osciak.com>
> + * Marek Szyprowski, <m.szyprowski at samsung.com>
> + */
> +
> +#include <linux/platform_device.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/v4l2-ctrls.h>
> +#include <media/v4l2-mem2mem.h>
> +
> +#include "cedrus.h"
> +#include "cedrus_video.h"
> +#include "cedrus_dec.h"
> +#include "cedrus_hw.h"
> +
> +static const struct cedrus_control cedrus_controls[] = {
> + {
> + .id = V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS,
> + .elem_size = sizeof(struct v4l2_ctrl_mpeg2_slice_params),
> + .codec = CEDRUS_CODEC_MPEG2,
> + .required = true,
> + },
> + {
> + .id = V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION,
> + .elem_size = sizeof(struct v4l2_ctrl_mpeg2_quantization),
> + .codec = CEDRUS_CODEC_MPEG2,
> + .required = false,
> + },
> +};
> +
> +#define CEDRUS_CONTROLS_COUNT ARRAY_SIZE(cedrus_controls)
> +
> +void *cedrus_find_control_data(struct cedrus_ctx *ctx, u32 id)
> +{
> + unsigned int i;
> +
> + for (i = 0; ctx->ctrls[i] != NULL; i++)
> + if (ctx->ctrls[i]->id == id)
> + return ctx->ctrls[i]->p_cur.p;
> +
> + return NULL;
> +}
> +
> +static int cedrus_init_ctrls(struct cedrus_dev *dev, struct cedrus_ctx *ctx)
> +{
> + struct v4l2_ctrl_handler *hdl = &ctx->hdl;
> + struct v4l2_ctrl *ctrl;
> + unsigned int ctrl_size;
> + unsigned int i;
> +
> + v4l2_ctrl_handler_init(hdl, CEDRUS_CONTROLS_COUNT);
> + if (hdl->error) {
> + v4l2_err(&dev->v4l2_dev,
> + "Failed to initialize control handler\n");
> + return hdl->error;
> + }
> +
> + ctrl_size = sizeof(ctrl) * CEDRUS_CONTROLS_COUNT + 1;
> +
> + ctx->ctrls = kzalloc(ctrl_size, GFP_KERNEL);
> + memset(ctx->ctrls, 0, ctrl_size);
> +
> + for (i = 0; i < CEDRUS_CONTROLS_COUNT; i++) {
> + struct v4l2_ctrl_config cfg = { 0 };
> +
> + cfg.elem_size = cedrus_controls[i].elem_size;
> + cfg.id = cedrus_controls[i].id;
> +
> + ctrl = v4l2_ctrl_new_custom(hdl, &cfg, NULL);
> + if (hdl->error) {
> + v4l2_err(&dev->v4l2_dev,
> + "Failed to create new custom control\n");
> +
> + v4l2_ctrl_handler_free(hdl);
> + kfree(ctx->ctrls);
> + return hdl->error;
> + }
> +
> + ctx->ctrls[i] = ctrl;
> + }
> +
> + ctx->fh.ctrl_handler = hdl;
> + v4l2_ctrl_handler_setup(hdl);
> +
> + return 0;
> +}
> +
> +static int cedrus_request_validate(struct media_request *req)
> +{
> + struct media_request_object *obj;
> + struct v4l2_ctrl_handler *parent_hdl, *hdl;
> + struct cedrus_ctx *ctx = NULL;
> + struct v4l2_ctrl *ctrl_test;
> + unsigned int i;
> +
> + if (vb2_request_buffer_cnt(req) != 1)
> + return -ENOENT;
> +
> + list_for_each_entry(obj, &req->objects, list) {
> + struct vb2_buffer *vb;
> +
> + if (vb2_request_object_is_buffer(obj)) {
> + vb = container_of(obj, struct vb2_buffer, req_obj);
> + ctx = vb2_get_drv_priv(vb->vb2_queue);
> +
> + break;
> + }
> + }
> +
> + if (!ctx)
> + return -ENOENT;
> +
> + parent_hdl = &ctx->hdl;
> +
> + hdl = v4l2_ctrl_request_hdl_find(req, parent_hdl);
> + if (!hdl) {
> + v4l2_err(&ctx->dev->v4l2_dev, "Missing codec control(s)\n");
> + return -ENOENT;
> + }
> +
> + for (i = 0; i < CEDRUS_CONTROLS_COUNT; i++) {
> + if (cedrus_controls[i].codec != ctx->current_codec ||
> + !cedrus_controls[i].required)
> + continue;
> +
> + ctrl_test = v4l2_ctrl_request_hdl_ctrl_find(hdl,
> + cedrus_controls[i].id);
> + if (!ctrl_test) {
> + v4l2_err(&ctx->dev->v4l2_dev,
> + "Missing required codec control\n");
> + return -ENOENT;
> + }
> + }
> +
> + v4l2_ctrl_request_hdl_put(hdl);
> +
> + return vb2_request_validate(req);
> +}
> +
> +static int cedrus_open(struct file *file)
> +{
> + struct cedrus_dev *dev = video_drvdata(file);
> + struct cedrus_ctx *ctx = NULL;
> + int ret;
> +
> + if (mutex_lock_interruptible(&dev->dev_mutex))
> + return -ERESTARTSYS;
> +
> + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
> + if (!ctx) {
> + mutex_unlock(&dev->dev_mutex);
> + return -ENOMEM;
> + }
> +
> + v4l2_fh_init(&ctx->fh, video_devdata(file));
> + file->private_data = &ctx->fh;
> + ctx->dev = dev;
> +
> + ret = cedrus_init_ctrls(dev, ctx);
> + if (ret)
> + goto err_free;
> +
> + ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx,
> + &cedrus_queue_init);
> + if (IS_ERR(ctx->fh.m2m_ctx)) {
> + ret = PTR_ERR(ctx->fh.m2m_ctx);
> + goto err_ctrls;
> + }
> +
> + v4l2_fh_add(&ctx->fh);
> +
> + mutex_unlock(&dev->dev_mutex);
> +
> + return 0;
> +
> +err_ctrls:
> + v4l2_ctrl_handler_free(&ctx->hdl);
> +err_free:
> + kfree(ctx);
> + mutex_unlock(&dev->dev_mutex);
> +
> + return ret;
> +}
> +
> +static int cedrus_release(struct file *file)
> +{
> + struct cedrus_dev *dev = video_drvdata(file);
> + struct cedrus_ctx *ctx = container_of(file->private_data,
> + struct cedrus_ctx, fh);
> +
> + mutex_lock(&dev->dev_mutex);
> +
> + v4l2_fh_del(&ctx->fh);
> + v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
> +
> + v4l2_ctrl_handler_free(&ctx->hdl);
> + kfree(ctx->ctrls);
> +
> + v4l2_fh_exit(&ctx->fh);
> +
> + kfree(ctx);
> +
> + mutex_unlock(&dev->dev_mutex);
> +
> + return 0;
> +}
> +
> +static const struct v4l2_file_operations cedrus_fops = {
> + .owner = THIS_MODULE,
> + .open = cedrus_open,
> + .release = cedrus_release,
> + .poll = v4l2_m2m_fop_poll,
> + .unlocked_ioctl = video_ioctl2,
> + .mmap = v4l2_m2m_fop_mmap,
> +};
> +
> +static const struct video_device cedrus_video_device = {
> + .name = CEDRUS_NAME,
> + .vfl_dir = VFL_DIR_M2M,
> + .fops = &cedrus_fops,
> + .ioctl_ops = &cedrus_ioctl_ops,
> + .minor = -1,
> + .release = video_device_release_empty,
> + .device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING,
> +};
> +
> +static const struct v4l2_m2m_ops cedrus_m2m_ops = {
> + .device_run = cedrus_device_run,
> +};
> +
> +static const struct media_device_ops cedrus_m2m_media_ops = {
> + .req_validate = cedrus_request_validate,
> + .req_queue = vb2_m2m_request_queue,
> +};
> +
> +static int cedrus_probe(struct platform_device *pdev)
> +{
> + struct cedrus_dev *dev;
> + struct video_device *vfd;
> + int ret;
> +
> + dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
> + if (!dev)
> + return -ENOMEM;
> +
> + dev->vfd = cedrus_video_device;
> + dev->dev = &pdev->dev;
> + dev->pdev = pdev;
> +
> + ret = cedrus_hw_probe(dev);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to probe hardware\n");
> + return ret;
> + }
> +
> + dev->dec_ops[CEDRUS_CODEC_MPEG2] = &cedrus_dec_ops_mpeg2;
> +
> + mutex_init(&dev->dev_mutex);
> + spin_lock_init(&dev->irq_lock);
> +
> + ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to register V4L2 device\n");
> + return ret;
> + }
> +
> + vfd = &dev->vfd;
> + vfd->lock = &dev->dev_mutex;
> + vfd->v4l2_dev = &dev->v4l2_dev;
> +
> + snprintf(vfd->name, sizeof(vfd->name), "%s", cedrus_video_device.name);
> + video_set_drvdata(vfd, dev);
> +
> + dev->m2m_dev = v4l2_m2m_init(&cedrus_m2m_ops);
> + if (IS_ERR(dev->m2m_dev)) {
> + v4l2_err(&dev->v4l2_dev,
> + "Failed to initialize V4L2 M2M device\n");
> + ret = PTR_ERR(dev->m2m_dev);
> +
> + goto err_video;
> + }
> +
> + dev->mdev.dev = &pdev->dev;
> + strlcpy(dev->mdev.model, CEDRUS_NAME, sizeof(dev->mdev.model));
This is a minor issue: we're getting rid of strlcpy upstream.
So, please send a followup patch replacing all occurrences of strcpy,
strncpy and strlcpy with strscpy().
The syntax is the same as strlcpy().
Thanks,
Mauro
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