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openwrt/target/linux/bcm27xx/patches-5.4/950-0177-staging-vc04_servi...

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From 6b2e734af2943dbf31bafb4c4c2fb588eec8059f Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
Date: Tue, 25 Sep 2018 14:53:49 +0100
Subject: [PATCH] staging: vc04_services: Add a V4L2 M2M codec driver
This adds a V4L2 memory to memory device that wraps the MMAL
video decode and video_encode components for H264 and MJPEG encode
and decode, MPEG4, H263, and VP8 decode (and MPEG2 decode
if the appropriate licence has been purchased).
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
---
drivers/staging/vc04_services/Kconfig | 1 +
drivers/staging/vc04_services/Makefile | 9 +-
.../vc04_services/bcm2835-codec/Kconfig | 11 +
.../vc04_services/bcm2835-codec/Makefile | 8 +
.../staging/vc04_services/bcm2835-codec/TODO | 24 +
.../bcm2835-codec/bcm2835-v4l2-codec.c | 2359 +++++++++++++++++
6 files changed, 2408 insertions(+), 4 deletions(-)
create mode 100644 drivers/staging/vc04_services/bcm2835-codec/Kconfig
create mode 100644 drivers/staging/vc04_services/bcm2835-codec/Makefile
create mode 100644 drivers/staging/vc04_services/bcm2835-codec/TODO
create mode 100644 drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
--- a/drivers/staging/vc04_services/Kconfig
+++ b/drivers/staging/vc04_services/Kconfig
@@ -24,6 +24,7 @@ source "drivers/staging/vc04_services/bc
source "drivers/staging/vc04_services/bcm2835-camera/Kconfig"
source "drivers/staging/vc04_services/vchiq-mmal/Kconfig"
source "drivers/staging/vc04_services/vc-sm-cma/Kconfig"
+source "drivers/staging/vc04_services/bcm2835-codec/Kconfig"
endif
--- a/drivers/staging/vc04_services/Makefile
+++ b/drivers/staging/vc04_services/Makefile
@@ -10,10 +10,11 @@ vchiq-objs := \
interface/vchiq_arm/vchiq_util.o \
interface/vchiq_arm/vchiq_connected.o \
-obj-$(CONFIG_SND_BCM2835) += bcm2835-audio/
-obj-$(CONFIG_VIDEO_BCM2835) += bcm2835-camera/
-obj-$(CONFIG_BCM2835_VCHIQ_MMAL) += vchiq-mmal/
-obj-$(CONFIG_BCM_VC_SM_CMA) += vc-sm-cma/
+obj-$(CONFIG_SND_BCM2835) += bcm2835-audio/
+obj-$(CONFIG_VIDEO_BCM2835) += bcm2835-camera/
+obj-$(CONFIG_BCM2835_VCHIQ_MMAL) += vchiq-mmal/
+obj-$(CONFIG_BCM_VC_SM_CMA) += vc-sm-cma/
+obj-$(CONFIG_VIDEO_CODEC_BCM2835) += bcm2835-codec/
ccflags-y += -Idrivers/staging/vc04_services -D__VCCOREVER__=0x04000000
--- /dev/null
+++ b/drivers/staging/vc04_services/bcm2835-codec/Kconfig
@@ -0,0 +1,11 @@
+config VIDEO_CODEC_BCM2835
+ tristate "BCM2835 Video codec support"
+ depends on MEDIA_SUPPORT
+ depends on VIDEO_V4L2 && (ARCH_BCM2835 || COMPILE_TEST)
+ select BCM2835_VCHIQ_MMAL
+ select VIDEOBUF2_DMA_CONTIG
+ select V4L2_MEM2MEM_DEV
+ help
+ Say Y here to enable the V4L2 video codecs for
+ Broadcom BCM2835 SoC. This operates over the VCHIQ interface
+ to a service running on VideoCore.
--- /dev/null
+++ b/drivers/staging/vc04_services/bcm2835-codec/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0
+bcm2835-codec-objs := bcm2835-v4l2-codec.o
+
+obj-$(CONFIG_VIDEO_CODEC_BCM2835) += bcm2835-codec.o
+
+ccflags-y += \
+ -Idrivers/staging/vc04_services \
+ -D__VCCOREVER__=0x04000000
--- /dev/null
+++ b/drivers/staging/vc04_services/bcm2835-codec/TODO
@@ -0,0 +1,24 @@
+1) Convert to be a platform driver.
+
+Right now when the module probes, it tries to initialize VCHI and
+errors out if it wasn't ready yet. If bcm2835-v4l2 was built in, then
+VCHI generally isn't ready because it depends on both the firmware and
+mailbox drivers having already loaded.
+
+We should have VCHI create a platform device once it's initialized,
+and have this driver bind to it, so that we automatically load the
+v4l2 module after VCHI loads.
+
+2) Support SELECTION API to define crop region on the image for encode.
+
+Particularly for resolutions that aren't a multiple of the macroblock
+size, the codec will report a resolution that is a multiple of the macroblock
+size (it has to have the memory to decode into), and then a different crop
+region within that buffer.
+The most common example is 1080P, where the buffer will be 1920x1088 with a
+crop region of 1920x1080.
+
+3) Refactor so that the component creation is only on queue_setup, not open.
+
+Fixes v4l2-compliance failure on trying to open 100 instances of the
+device.
\ No newline at end of file
--- /dev/null
+++ b/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
@@ -0,0 +1,2359 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * A v4l2-mem2mem device that wraps the video codec MMAL component.
+ *
+ * Copyright 2018 Raspberry Pi (Trading) Ltd.
+ * Author: Dave Stevenson (dave.stevenson@raspberrypi.org)
+ *
+ * Loosely based on the vim2m virtual driver by Pawel Osciak
+ * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
+ * Pawel Osciak, <pawel@osciak.com>
+ * Marek Szyprowski, <m.szyprowski@samsung.com>
+ *
+ * Whilst this driver uses the v4l2_mem2mem framework, it does not need the
+ * scheduling aspects, so will always take the buffers, pass them to the VPU,
+ * and then signal the job as complete.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version
+ */
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/timer.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/syscalls.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 "vchiq-mmal/mmal-encodings.h"
+#include "vchiq-mmal/mmal-msg.h"
+#include "vchiq-mmal/mmal-parameters.h"
+#include "vchiq-mmal/mmal-vchiq.h"
+
+/*
+ * Default /dev/videoN node numbers for decode and encode.
+ * Deliberately avoid the very low numbers as these are often taken by webcams
+ * etc, and simple apps tend to only go for /dev/video0.
+ */
+static int decode_video_nr = 10;
+module_param(decode_video_nr, int, 0644);
+MODULE_PARM_DESC(decode_video_nr, "decoder video device number");
+
+static int encode_video_nr = 11;
+module_param(encode_video_nr, int, 0644);
+MODULE_PARM_DESC(encode_video_nr, "encoder video device number");
+
+static unsigned int debug;
+module_param(debug, uint, 0644);
+MODULE_PARM_DESC(debug, "activates debug info (0-3)");
+
+#define MIN_W 32
+#define MIN_H 32
+#define MAX_W 1920
+#define MAX_H 1088
+#define BPL_ALIGN 32
+#define DEFAULT_WIDTH 640
+#define DEFAULT_HEIGHT 480
+/*
+ * The unanswered question - what is the maximum size of a compressed frame?
+ * V4L2 mandates that the encoded frame must fit in a single buffer. Sizing
+ * that buffer is a compromise between wasting memory and risking not fitting.
+ * The 1080P version of Big Buck Bunny has some frames that exceed 512kB.
+ * Adopt a moderately arbitrary split at 720P for switching between 512 and
+ * 768kB buffers.
+ */
+#define DEF_COMP_BUF_SIZE_GREATER_720P (768 << 10)
+#define DEF_COMP_BUF_SIZE_720P_OR_LESS (512 << 10)
+
+/* Flags that indicate a format can be used for capture/output */
+#define MEM2MEM_CAPTURE BIT(0)
+#define MEM2MEM_OUTPUT BIT(1)
+
+#define MEM2MEM_NAME "bcm2835-codec"
+
+struct bcm2835_codec_fmt {
+ u32 fourcc;
+ int depth;
+ int bytesperline_align;
+ u32 flags;
+ u32 mmal_fmt;
+ bool decode_only;
+ bool encode_only;
+ int size_multiplier_x2;
+};
+
+/* Supported raw pixel formats. Those supported for both encode and decode
+ * must come first, with those only supported for decode coming after (there
+ * are no formats supported for encode only).
+ */
+static struct bcm2835_codec_fmt raw_formats[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_YUV420,
+ .depth = 8,
+ .bytesperline_align = 32,
+ .flags = 0,
+ .mmal_fmt = MMAL_ENCODING_I420,
+ .size_multiplier_x2 = 3,
+ }, {
+ .fourcc = V4L2_PIX_FMT_YVU420,
+ .depth = 8,
+ .bytesperline_align = 32,
+ .flags = 0,
+ .mmal_fmt = MMAL_ENCODING_YV12,
+ .size_multiplier_x2 = 3,
+ }, {
+ .fourcc = V4L2_PIX_FMT_NV12,
+ .depth = 8,
+ .bytesperline_align = 32,
+ .flags = 0,
+ .mmal_fmt = MMAL_ENCODING_NV12,
+ .size_multiplier_x2 = 3,
+ }, {
+ .fourcc = V4L2_PIX_FMT_NV21,
+ .depth = 8,
+ .bytesperline_align = 32,
+ .flags = 0,
+ .mmal_fmt = MMAL_ENCODING_NV21,
+ .size_multiplier_x2 = 3,
+ }, {
+ .fourcc = V4L2_PIX_FMT_RGB565,
+ .depth = 16,
+ .bytesperline_align = 32,
+ .flags = 0,
+ .mmal_fmt = MMAL_ENCODING_RGB16,
+ .size_multiplier_x2 = 2,
+ }, {
+ .fourcc = V4L2_PIX_FMT_YUYV,
+ .depth = 16,
+ .bytesperline_align = 32,
+ .flags = 0,
+ .mmal_fmt = MMAL_ENCODING_YUYV,
+ .encode_only = true,
+ .size_multiplier_x2 = 2,
+ }, {
+ .fourcc = V4L2_PIX_FMT_UYVY,
+ .depth = 16,
+ .bytesperline_align = 32,
+ .flags = 0,
+ .mmal_fmt = MMAL_ENCODING_UYVY,
+ .encode_only = true,
+ .size_multiplier_x2 = 2,
+ }, {
+ .fourcc = V4L2_PIX_FMT_YVYU,
+ .depth = 16,
+ .bytesperline_align = 32,
+ .flags = 0,
+ .mmal_fmt = MMAL_ENCODING_YVYU,
+ .encode_only = true,
+ .size_multiplier_x2 = 2,
+ }, {
+ .fourcc = V4L2_PIX_FMT_VYUY,
+ .depth = 16,
+ .bytesperline_align = 32,
+ .flags = 0,
+ .mmal_fmt = MMAL_ENCODING_VYUY,
+ .encode_only = true,
+ .size_multiplier_x2 = 2,
+ }, {
+ .fourcc = V4L2_PIX_FMT_RGB24,
+ .depth = 24,
+ .bytesperline_align = 32,
+ .flags = 0,
+ .mmal_fmt = MMAL_ENCODING_RGB24,
+ .encode_only = true,
+ .size_multiplier_x2 = 2,
+ }, {
+ .fourcc = V4L2_PIX_FMT_BGR24,
+ .depth = 24,
+ .bytesperline_align = 32,
+ .flags = 0,
+ .mmal_fmt = MMAL_ENCODING_BGR24,
+ .encode_only = true,
+ .size_multiplier_x2 = 2,
+ }, {
+ .fourcc = V4L2_PIX_FMT_BGR32,
+ .depth = 32,
+ .bytesperline_align = 32,
+ .flags = 0,
+ .mmal_fmt = MMAL_ENCODING_BGRA,
+ .encode_only = true,
+ .size_multiplier_x2 = 2,
+ },
+};
+
+/* Supported encoded formats. Those supported for both encode and decode
+ * must come first, with those only supported for decode coming after (there
+ * are no formats supported for encode only).
+ */
+static struct bcm2835_codec_fmt encoded_formats[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_H264,
+ .depth = 0,
+ .flags = V4L2_FMT_FLAG_COMPRESSED,
+ .mmal_fmt = MMAL_ENCODING_H264,
+ }, {
+ .fourcc = V4L2_PIX_FMT_MJPEG,
+ .depth = 0,
+ .flags = V4L2_FMT_FLAG_COMPRESSED,
+ .mmal_fmt = MMAL_ENCODING_MJPEG,
+ }, {
+ .fourcc = V4L2_PIX_FMT_MPEG4,
+ .depth = 0,
+ .flags = V4L2_FMT_FLAG_COMPRESSED,
+ .mmal_fmt = MMAL_ENCODING_MP4V,
+ .decode_only = true,
+ }, {
+ .fourcc = V4L2_PIX_FMT_H263,
+ .depth = 0,
+ .flags = V4L2_FMT_FLAG_COMPRESSED,
+ .mmal_fmt = MMAL_ENCODING_H263,
+ .decode_only = true,
+ }, {
+ .fourcc = V4L2_PIX_FMT_MPEG2,
+ .depth = 0,
+ .flags = V4L2_FMT_FLAG_COMPRESSED,
+ .mmal_fmt = MMAL_ENCODING_MP2V,
+ .decode_only = true,
+ }, {
+ .fourcc = V4L2_PIX_FMT_VP8,
+ .depth = 0,
+ .flags = V4L2_FMT_FLAG_COMPRESSED,
+ .mmal_fmt = MMAL_ENCODING_VP8,
+ .decode_only = true,
+ },
+ /*
+ * This list couold include VP6 and Theorafor decode, but V4L2 doesn't
+ * support them.
+ */
+};
+
+struct bcm2835_codec_fmt_list {
+ struct bcm2835_codec_fmt *list;
+ unsigned int num_entries;
+};
+
+#define RAW_LIST 0
+#define ENCODED_LIST 1
+
+struct bcm2835_codec_fmt_list formats[] = {
+ {
+ .list = raw_formats,
+ .num_entries = ARRAY_SIZE(raw_formats),
+ }, {
+ .list = encoded_formats,
+ .num_entries = ARRAY_SIZE(encoded_formats),
+ },
+};
+
+struct m2m_mmal_buffer {
+ struct v4l2_m2m_buffer m2m;
+ struct mmal_buffer mmal;
+};
+
+/* Per-queue, driver-specific private data */
+struct bcm2835_codec_q_data {
+ /*
+ * These parameters should be treated as gospel, with everything else
+ * being determined from them.
+ */
+ /* Buffer width/height */
+ unsigned int bytesperline;
+ unsigned int height;
+ /* Crop size used for selection handling */
+ unsigned int crop_width;
+ unsigned int crop_height;
+ bool selection_set;
+
+ unsigned int sizeimage;
+ unsigned int sequence;
+ struct bcm2835_codec_fmt *fmt;
+
+ /* One extra buffer header so we can send an EOS. */
+ struct m2m_mmal_buffer eos_buffer;
+ bool eos_buffer_in_use; /* debug only */
+};
+
+enum {
+ V4L2_M2M_SRC = 0,
+ V4L2_M2M_DST = 1,
+};
+
+static inline struct bcm2835_codec_fmt_list *get_format_list(bool decode,
+ bool capture)
+{
+ return decode ^ capture ? &formats[ENCODED_LIST] : &formats[RAW_LIST];
+}
+
+static struct bcm2835_codec_fmt *get_default_format(bool decode, bool capture)
+{
+ return &get_format_list(decode, capture)->list[0];
+}
+
+static struct bcm2835_codec_fmt *find_format(struct v4l2_format *f, bool decode,
+ bool capture)
+{
+ struct bcm2835_codec_fmt *fmt;
+ unsigned int k;
+ struct bcm2835_codec_fmt_list *fmts = get_format_list(decode, capture);
+
+ for (k = 0; k < fmts->num_entries; k++) {
+ fmt = &fmts->list[k];
+ if (fmt->fourcc == f->fmt.pix.pixelformat)
+ break;
+ }
+
+ /*
+ * Some compressed formats are only supported for decoding, not
+ * encoding.
+ */
+ if (!decode && fmts->list[k].decode_only)
+ return NULL;
+
+ /* Some pixel formats are only supported for encoding, not decoding. */
+ if (decode && fmts->list[k].encode_only)
+ return NULL;
+
+ if (k == fmts->num_entries)
+ return NULL;
+
+ return &fmts->list[k];
+}
+
+struct bcm2835_codec_dev {
+ struct platform_device *pdev;
+
+ /* v4l2 devices */
+ struct v4l2_device v4l2_dev;
+ struct video_device vfd;
+ /* mutex for the v4l2 device */
+ struct mutex dev_mutex;
+ atomic_t num_inst;
+
+ /* allocated mmal instance and components */
+ bool decode; /* Is this instance a decoder? */
+ struct vchiq_mmal_instance *instance;
+
+ struct v4l2_m2m_dev *m2m_dev;
+};
+
+struct bcm2835_codec_ctx {
+ struct v4l2_fh fh;
+ struct bcm2835_codec_dev *dev;
+
+ struct v4l2_ctrl_handler hdl;
+
+ struct vchiq_mmal_component *component;
+ bool component_enabled;
+
+ enum v4l2_colorspace colorspace;
+ enum v4l2_ycbcr_encoding ycbcr_enc;
+ enum v4l2_xfer_func xfer_func;
+ enum v4l2_quantization quant;
+
+ /* Source and destination queue data */
+ struct bcm2835_codec_q_data q_data[2];
+ s32 bitrate;
+
+ bool aborting;
+ int num_ip_buffers;
+ int num_op_buffers;
+ struct completion frame_cmplt;
+};
+
+struct bcm2835_codec_driver {
+ struct bcm2835_codec_dev *encode;
+ struct bcm2835_codec_dev *decode;
+};
+
+static inline struct bcm2835_codec_ctx *file2ctx(struct file *file)
+{
+ return container_of(file->private_data, struct bcm2835_codec_ctx, fh);
+}
+
+static struct bcm2835_codec_q_data *get_q_data(struct bcm2835_codec_ctx *ctx,
+ enum v4l2_buf_type type)
+{
+ switch (type) {
+ case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+ return &ctx->q_data[V4L2_M2M_SRC];
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ return &ctx->q_data[V4L2_M2M_DST];
+ default:
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Invalid queue type %u\n",
+ __func__, type);
+ break;
+ }
+ return NULL;
+}
+
+static struct vchiq_mmal_port *get_port_data(struct bcm2835_codec_ctx *ctx,
+ enum v4l2_buf_type type)
+{
+ if (!ctx->component)
+ return NULL;
+
+ switch (type) {
+ case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+ return &ctx->component->input[0];
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ return &ctx->component->output[0];
+ default:
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Invalid queue type %u\n",
+ __func__, type);
+ break;
+ }
+ return NULL;
+}
+
+/*
+ * mem2mem callbacks
+ */
+
+/**
+ * job_ready() - check whether an instance is ready to be scheduled to run
+ */
+static int job_ready(void *priv)
+{
+ struct bcm2835_codec_ctx *ctx = priv;
+
+ if (!v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) &&
+ !v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx))
+ return 0;
+
+ return 1;
+}
+
+static void job_abort(void *priv)
+{
+ struct bcm2835_codec_ctx *ctx = priv;
+
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "%s\n", __func__);
+ /* Will cancel the transaction in the next interrupt handler */
+ ctx->aborting = 1;
+}
+
+static inline unsigned int get_sizeimage(int bpl, int height,
+ struct bcm2835_codec_fmt *fmt)
+{
+ return (bpl * height * fmt->size_multiplier_x2) >> 1;
+}
+
+static inline unsigned int get_bytesperline(int width,
+ struct bcm2835_codec_fmt *fmt)
+{
+ return ALIGN((width * fmt->depth) >> 3, fmt->bytesperline_align);
+}
+
+static void setup_mmal_port_format(struct bcm2835_codec_ctx *ctx,
+ bool decode,
+ struct bcm2835_codec_q_data *q_data,
+ struct vchiq_mmal_port *port)
+{
+ port->format.encoding = q_data->fmt->mmal_fmt;
+
+ if (!(q_data->fmt->flags & V4L2_FMT_FLAG_COMPRESSED)) {
+ /* Raw image format - set width/height */
+ port->es.video.width = q_data->bytesperline /
+ (q_data->fmt->depth >> 3);
+ port->es.video.height = q_data->height;
+ port->es.video.crop.width = q_data->crop_width;
+ port->es.video.crop.height = q_data->crop_height;
+ port->es.video.frame_rate.num = 0;
+ port->es.video.frame_rate.den = 1;
+ } else {
+ /* Compressed format - leave resolution as 0 for decode */
+ if (decode) {
+ port->es.video.width = 0;
+ port->es.video.height = 0;
+ port->es.video.crop.width = 0;
+ port->es.video.crop.height = 0;
+ } else {
+ port->es.video.width = q_data->crop_width;
+ port->es.video.height = q_data->height;
+ port->es.video.crop.width = q_data->crop_width;
+ port->es.video.crop.height = q_data->crop_height;
+ port->format.bitrate = ctx->bitrate;
+ }
+ port->es.video.frame_rate.num = 0;
+ port->es.video.frame_rate.den = 1;
+ }
+ port->es.video.crop.x = 0;
+ port->es.video.crop.y = 0;
+
+ port->current_buffer.size = q_data->sizeimage;
+};
+
+static void ip_buffer_cb(struct vchiq_mmal_instance *instance,
+ struct vchiq_mmal_port *port, int status,
+ struct mmal_buffer *mmal_buf)
+{
+ struct bcm2835_codec_ctx *ctx = port->cb_ctx/*, *curr_ctx*/;
+ struct m2m_mmal_buffer *buf =
+ container_of(mmal_buf, struct m2m_mmal_buffer, mmal);
+
+ v4l2_dbg(2, debug, &ctx->dev->v4l2_dev, "%s: port %p buf %p length %lu, flags %x\n",
+ __func__, port, mmal_buf, mmal_buf->length,
+ mmal_buf->mmal_flags);
+
+ if (buf == &ctx->q_data[V4L2_M2M_SRC].eos_buffer) {
+ /* Do we need to add lcoking to prevent multiple submission of
+ * the EOS, and therefore handle mutliple return here?
+ */
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "%s: eos buffer returned.\n",
+ __func__);
+ ctx->q_data[V4L2_M2M_SRC].eos_buffer_in_use = false;
+ return;
+ }
+
+ if (status) {
+ /* error in transfer */
+ if (buf)
+ /* there was a buffer with the error so return it */
+ vb2_buffer_done(&buf->m2m.vb.vb2_buf,
+ VB2_BUF_STATE_ERROR);
+ return;
+ }
+ if (mmal_buf->cmd) {
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Not expecting cmd msgs on ip callback - %08x\n",
+ __func__, mmal_buf->cmd);
+ /*
+ * CHECKME: Should we return here. The buffer shouldn't have a
+ * message context or vb2 buf associated.
+ */
+ }
+
+ v4l2_dbg(3, debug, &ctx->dev->v4l2_dev, "%s: no error. Return buffer %p\n",
+ __func__, &buf->m2m.vb.vb2_buf);
+ vb2_buffer_done(&buf->m2m.vb.vb2_buf, VB2_BUF_STATE_DONE);
+
+ ctx->num_ip_buffers++;
+ v4l2_dbg(2, debug, &ctx->dev->v4l2_dev, "%s: done %d input buffers\n",
+ __func__, ctx->num_ip_buffers);
+
+ if (!port->enabled)
+ complete(&ctx->frame_cmplt);
+}
+
+static void queue_res_chg_event(struct bcm2835_codec_ctx *ctx)
+{
+ static const struct v4l2_event ev_src_ch = {
+ .type = V4L2_EVENT_SOURCE_CHANGE,
+ .u.src_change.changes =
+ V4L2_EVENT_SRC_CH_RESOLUTION,
+ };
+
+ v4l2_event_queue_fh(&ctx->fh, &ev_src_ch);
+}
+
+static void send_eos_event(struct bcm2835_codec_ctx *ctx)
+{
+ static const struct v4l2_event ev = {
+ .type = V4L2_EVENT_EOS,
+ };
+
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "Sending EOS event\n");
+
+ v4l2_event_queue_fh(&ctx->fh, &ev);
+}
+
+static void color_mmal2v4l(struct bcm2835_codec_ctx *ctx, u32 mmal_color_space)
+{
+ switch (mmal_color_space) {
+ case MMAL_COLOR_SPACE_ITUR_BT601:
+ ctx->colorspace = V4L2_COLORSPACE_REC709;
+ ctx->xfer_func = V4L2_XFER_FUNC_709;
+ ctx->ycbcr_enc = V4L2_YCBCR_ENC_601;
+ ctx->quant = V4L2_QUANTIZATION_LIM_RANGE;
+ break;
+
+ case MMAL_COLOR_SPACE_ITUR_BT709:
+ ctx->colorspace = V4L2_COLORSPACE_REC709;
+ ctx->xfer_func = V4L2_XFER_FUNC_709;
+ ctx->ycbcr_enc = V4L2_YCBCR_ENC_709;
+ ctx->quant = V4L2_QUANTIZATION_LIM_RANGE;
+ break;
+ }
+}
+
+static void handle_fmt_changed(struct bcm2835_codec_ctx *ctx,
+ struct mmal_buffer *mmal_buf)
+{
+ struct bcm2835_codec_q_data *q_data;
+ struct mmal_msg_event_format_changed *format =
+ (struct mmal_msg_event_format_changed *)mmal_buf->buffer;
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "%s: Format changed: buff size min %u, rec %u, buff num min %u, rec %u\n",
+ __func__,
+ format->buffer_size_min,
+ format->buffer_size_recommended,
+ format->buffer_num_min,
+ format->buffer_num_recommended
+ );
+ if (format->format.type != MMAL_ES_TYPE_VIDEO) {
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "%s: Format changed but not video %u\n",
+ __func__, format->format.type);
+ return;
+ }
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "%s: Format changed to %ux%u, crop %ux%u, colourspace %08X\n",
+ __func__, format->es.video.width, format->es.video.height,
+ format->es.video.crop.width, format->es.video.crop.height,
+ format->es.video.color_space);
+
+ q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
+ q_data->crop_width = format->es.video.crop.width;
+ q_data->crop_height = format->es.video.crop.height;
+ q_data->bytesperline = format->es.video.crop.width;
+ q_data->height = format->es.video.height;
+ q_data->sizeimage = format->buffer_size_min;
+ if (format->es.video.color_space)
+ color_mmal2v4l(ctx, format->es.video.color_space);
+
+ queue_res_chg_event(ctx);
+}
+
+static void op_buffer_cb(struct vchiq_mmal_instance *instance,
+ struct vchiq_mmal_port *port, int status,
+ struct mmal_buffer *mmal_buf)
+{
+ struct bcm2835_codec_ctx *ctx = port->cb_ctx;
+ struct m2m_mmal_buffer *buf;
+ struct vb2_v4l2_buffer *vb2;
+
+ v4l2_dbg(2, debug, &ctx->dev->v4l2_dev,
+ "%s: status:%d, buf:%p, length:%lu, flags %u, pts %lld\n",
+ __func__, status, mmal_buf, mmal_buf->length,
+ mmal_buf->mmal_flags, mmal_buf->pts);
+
+ if (status) {
+ /* error in transfer */
+ if (vb2) {
+ /* there was a buffer with the error so return it */
+ vb2_buffer_done(&vb2->vb2_buf, VB2_BUF_STATE_ERROR);
+ }
+ return;
+ }
+
+ if (mmal_buf->cmd) {
+ switch (mmal_buf->cmd) {
+ case MMAL_EVENT_FORMAT_CHANGED:
+ {
+ handle_fmt_changed(ctx, mmal_buf);
+ break;
+ }
+ default:
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Unexpected event on output callback - %08x\n",
+ __func__, mmal_buf->cmd);
+ break;
+ }
+ return;
+ }
+
+ buf = container_of(mmal_buf, struct m2m_mmal_buffer, mmal);
+ vb2 = &buf->m2m.vb;
+
+ v4l2_dbg(3, debug, &ctx->dev->v4l2_dev, "%s: length %lu, flags %x, idx %u\n",
+ __func__, mmal_buf->length, mmal_buf->mmal_flags,
+ vb2->vb2_buf.index);
+
+ if (mmal_buf->length == 0) {
+ /* stream ended, or buffer being returned during disable. */
+ v4l2_dbg(2, debug, &ctx->dev->v4l2_dev, "%s: Empty buffer - flags %04x",
+ __func__, mmal_buf->mmal_flags);
+ if (!mmal_buf->mmal_flags & MMAL_BUFFER_HEADER_FLAG_EOS) {
+ vb2_buffer_done(&vb2->vb2_buf, VB2_BUF_STATE_ERROR);
+ if (!port->enabled)
+ complete(&ctx->frame_cmplt);
+ return;
+ }
+ }
+ if (mmal_buf->mmal_flags & MMAL_BUFFER_HEADER_FLAG_EOS) {
+ /* EOS packet from the VPU */
+ send_eos_event(ctx);
+ vb2->flags |= V4L2_BUF_FLAG_LAST;
+ }
+
+ vb2->vb2_buf.timestamp = mmal_buf->pts;
+
+ vb2_set_plane_payload(&vb2->vb2_buf, 0, mmal_buf->length);
+ if (mmal_buf->mmal_flags & MMAL_BUFFER_HEADER_FLAG_KEYFRAME)
+ vb2->flags |= V4L2_BUF_FLAG_KEYFRAME;
+
+ vb2_buffer_done(&vb2->vb2_buf, VB2_BUF_STATE_DONE);
+ ctx->num_op_buffers++;
+
+ v4l2_dbg(2, debug, &ctx->dev->v4l2_dev, "%s: done %d output buffers\n",
+ __func__, ctx->num_op_buffers);
+
+ if (!port->enabled)
+ complete(&ctx->frame_cmplt);
+}
+
+/* vb2_to_mmal_buffer() - converts vb2 buffer header to MMAL
+ *
+ * Copies all the required fields from a VB2 buffer to the MMAL buffer header,
+ * ready for sending to the VPU.
+ */
+static void vb2_to_mmal_buffer(struct m2m_mmal_buffer *buf,
+ struct vb2_v4l2_buffer *vb2)
+{
+ buf->mmal.mmal_flags = 0;
+ if (vb2->flags & V4L2_BUF_FLAG_KEYFRAME)
+ buf->mmal.mmal_flags |= MMAL_BUFFER_HEADER_FLAG_KEYFRAME;
+
+ /*
+ * Adding this means that the data must be framed correctly as one frame
+ * per buffer. The underlying decoder has no such requirement, but it
+ * will reduce latency as the bistream parser will be kicked immediately
+ * to parse the frame, rather than relying on its own heuristics for
+ * when to wake up.
+ */
+ buf->mmal.mmal_flags |= MMAL_BUFFER_HEADER_FLAG_FRAME_END;
+
+ buf->mmal.length = vb2->vb2_buf.planes[0].bytesused;
+ /*
+ * Minor ambiguity in the V4L2 spec as to whether passing in a 0 length
+ * buffer, or one with V4L2_BUF_FLAG_LAST set denotes end of stream.
+ * Handle either.
+ */
+ if (!buf->mmal.length || vb2->flags & V4L2_BUF_FLAG_LAST)
+ buf->mmal.mmal_flags |= MMAL_BUFFER_HEADER_FLAG_EOS;
+
+ buf->mmal.pts = vb2->vb2_buf.timestamp;
+ buf->mmal.dts = MMAL_TIME_UNKNOWN;
+}
+
+/* device_run() - prepares and starts the device
+ *
+ * This simulates all the immediate preparations required before starting
+ * a device. This will be called by the framework when it decides to schedule
+ * a particular instance.
+ */
+static void device_run(void *priv)
+{
+ struct bcm2835_codec_ctx *ctx = priv;
+ struct bcm2835_codec_dev *dev = ctx->dev;
+ struct vb2_v4l2_buffer *src_buf, *dst_buf;
+ struct m2m_mmal_buffer *src_m2m_buf, *dst_m2m_buf;
+ struct v4l2_m2m_buffer *m2m;
+ int ret;
+
+ v4l2_dbg(3, debug, &ctx->dev->v4l2_dev, "%s: off we go\n", __func__);
+
+ src_buf = v4l2_m2m_buf_remove(&ctx->fh.m2m_ctx->out_q_ctx);
+ if (src_buf) {
+ m2m = container_of(src_buf, struct v4l2_m2m_buffer, vb);
+ src_m2m_buf = container_of(m2m, struct m2m_mmal_buffer, m2m);
+ vb2_to_mmal_buffer(src_m2m_buf, src_buf);
+
+ ret = vchiq_mmal_submit_buffer(dev->instance,
+ &ctx->component->input[0],
+ &src_m2m_buf->mmal);
+ v4l2_dbg(3, debug, &ctx->dev->v4l2_dev, "%s: Submitted ip buffer len %lu, pts %llu, flags %04x\n",
+ __func__, src_m2m_buf->mmal.length,
+ src_m2m_buf->mmal.pts, src_m2m_buf->mmal.mmal_flags);
+ if (ret)
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Failed submitting ip buffer\n",
+ __func__);
+ }
+
+ dst_buf = v4l2_m2m_buf_remove(&ctx->fh.m2m_ctx->cap_q_ctx);
+ if (dst_buf) {
+ m2m = container_of(dst_buf, struct v4l2_m2m_buffer, vb);
+ dst_m2m_buf = container_of(m2m, struct m2m_mmal_buffer, m2m);
+ vb2_to_mmal_buffer(dst_m2m_buf, dst_buf);
+
+ ret = vchiq_mmal_submit_buffer(dev->instance,
+ &ctx->component->output[0],
+ &dst_m2m_buf->mmal);
+ if (ret)
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Failed submitting op buffer\n",
+ __func__);
+ }
+
+ v4l2_dbg(3, debug, &ctx->dev->v4l2_dev, "%s: Submitted src %p, dst %p\n",
+ __func__, src_m2m_buf, dst_m2m_buf);
+
+ /* Complete the job here. */
+ v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
+}
+
+/*
+ * video ioctls
+ */
+static int vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
+ strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
+ snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
+ MEM2MEM_NAME);
+ cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+static int enum_fmt(struct v4l2_fmtdesc *f, bool decode, bool capture)
+{
+ struct bcm2835_codec_fmt *fmt;
+ struct bcm2835_codec_fmt_list *fmts = get_format_list(decode, capture);
+
+ if (f->index < fmts->num_entries) {
+ /* Format found */
+ /* Check format isn't a decode only format when encoding */
+ if (!decode &&
+ fmts->list[f->index].decode_only)
+ return -EINVAL;
+ /* Check format isn't a decode only format when encoding */
+ if (decode &&
+ fmts->list[f->index].encode_only)
+ return -EINVAL;
+
+ fmt = &fmts->list[f->index];
+ f->pixelformat = fmt->fourcc;
+ f->flags = fmt->flags;
+ return 0;
+ }
+
+ /* Format not found */
+ return -EINVAL;
+}
+
+static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct bcm2835_codec_ctx *ctx = file2ctx(file);
+
+ return enum_fmt(f, ctx->dev->decode, true);
+}
+
+static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct bcm2835_codec_ctx *ctx = file2ctx(file);
+
+ return enum_fmt(f, ctx->dev->decode, false);
+}
+
+static int vidioc_g_fmt(struct bcm2835_codec_ctx *ctx, struct v4l2_format *f)
+{
+ struct vb2_queue *vq;
+ struct bcm2835_codec_q_data *q_data;
+
+ vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
+ if (!vq)
+ return -EINVAL;
+
+ q_data = get_q_data(ctx, f->type);
+
+ f->fmt.pix.width = q_data->crop_width;
+ f->fmt.pix.height = q_data->height;
+ f->fmt.pix.field = V4L2_FIELD_NONE;
+ f->fmt.pix.pixelformat = q_data->fmt->fourcc;
+ f->fmt.pix.bytesperline = q_data->bytesperline;
+ f->fmt.pix.sizeimage = q_data->sizeimage;
+ f->fmt.pix.colorspace = ctx->colorspace;
+ f->fmt.pix.xfer_func = ctx->xfer_func;
+ f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
+ f->fmt.pix.quantization = ctx->quant;
+
+ 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 bcm2835_codec_fmt *fmt)
+{
+ /*
+ * The V4L2 specification requires the driver to correct the format
+ * struct if any of the dimensions is unsupported
+ */
+ if (f->fmt.pix.width > MAX_W)
+ f->fmt.pix.width = MAX_W;
+ if (f->fmt.pix.height > MAX_H)
+ f->fmt.pix.height = MAX_H;
+
+ if (!fmt->flags & V4L2_FMT_FLAG_COMPRESSED) {
+ /* Only clip min w/h on capture. Treat 0x0 as unknown. */
+ if (f->fmt.pix.width < MIN_W)
+ f->fmt.pix.width = MIN_W;
+ if (f->fmt.pix.height < MIN_H)
+ f->fmt.pix.height = MIN_H;
+
+ /*
+ * Buffer must have a vertical alignment of 16 lines.
+ * The selection will reflect any cropping rectangle when only
+ * some of the pixels are active.
+ */
+ f->fmt.pix.height = ALIGN(f->fmt.pix.height, 16);
+
+ f->fmt.pix.bytesperline = get_bytesperline(f->fmt.pix.width,
+ fmt);
+ f->fmt.pix.sizeimage = get_sizeimage(f->fmt.pix.bytesperline,
+ f->fmt.pix.height,
+ fmt);
+ } else {
+ u32 min_size = f->fmt.pix.width > 1280 ||
+ f->fmt.pix.height > 720 ?
+ DEF_COMP_BUF_SIZE_GREATER_720P :
+ DEF_COMP_BUF_SIZE_720P_OR_LESS;
+
+ f->fmt.pix.bytesperline = 0;
+ if (f->fmt.pix.sizeimage < min_size)
+ f->fmt.pix.sizeimage = min_size;
+ }
+
+ f->fmt.pix.field = V4L2_FIELD_NONE;
+
+ return 0;
+}
+
+static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct bcm2835_codec_fmt *fmt;
+ struct bcm2835_codec_ctx *ctx = file2ctx(file);
+
+ fmt = find_format(f, ctx->dev->decode, true);
+ if (!fmt) {
+ f->fmt.pix.pixelformat = get_default_format(ctx->dev->decode,
+ true)->fourcc;
+ fmt = find_format(f, ctx->dev->decode, true);
+ }
+
+ return vidioc_try_fmt(f, fmt);
+}
+
+static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct bcm2835_codec_fmt *fmt;
+ struct bcm2835_codec_ctx *ctx = file2ctx(file);
+
+ fmt = find_format(f, ctx->dev->decode, false);
+ if (!fmt) {
+ f->fmt.pix.pixelformat = get_default_format(ctx->dev->decode,
+ false)->fourcc;
+ fmt = find_format(f, ctx->dev->decode, false);
+ }
+
+ if (!f->fmt.pix.colorspace)
+ f->fmt.pix.colorspace = ctx->colorspace;
+
+ return vidioc_try_fmt(f, fmt);
+}
+
+static int vidioc_s_fmt(struct bcm2835_codec_ctx *ctx, struct v4l2_format *f,
+ unsigned int requested_height)
+{
+ struct bcm2835_codec_q_data *q_data;
+ struct vb2_queue *vq;
+ struct vchiq_mmal_port *port;
+ bool update_capture_port = false;
+ int ret;
+
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "Setting format for type %d, wxh: %dx%d, fmt: %08x, size %u\n",
+ f->type, f->fmt.pix.width, f->fmt.pix.height,
+ f->fmt.pix.pixelformat, f->fmt.pix.sizeimage);
+
+ vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
+ if (!vq)
+ return -EINVAL;
+
+ q_data = get_q_data(ctx, f->type);
+ if (!q_data)
+ return -EINVAL;
+
+ if (vb2_is_busy(vq)) {
+ v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
+ return -EBUSY;
+ }
+
+ q_data->fmt = find_format(f, ctx->dev->decode,
+ f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE);
+ q_data->crop_width = f->fmt.pix.width;
+ q_data->height = f->fmt.pix.height;
+ if (!q_data->selection_set)
+ q_data->crop_height = requested_height;
+
+ /*
+ * Copying the behaviour of vicodec which retains a single set of
+ * colorspace parameters for both input and output.
+ */
+ ctx->colorspace = f->fmt.pix.colorspace;
+ ctx->xfer_func = f->fmt.pix.xfer_func;
+ ctx->ycbcr_enc = f->fmt.pix.ycbcr_enc;
+ ctx->quant = f->fmt.pix.quantization;
+
+ /* All parameters should have been set correctly by try_fmt */
+ q_data->bytesperline = f->fmt.pix.bytesperline;
+ q_data->sizeimage = f->fmt.pix.sizeimage;
+
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "Calulated bpl as %u, size %u\n",
+ q_data->bytesperline, q_data->sizeimage);
+
+ if (ctx->dev->decode && q_data->fmt->flags & V4L2_FMT_FLAG_COMPRESSED &&
+ f->fmt.pix.width && f->fmt.pix.height) {
+ /*
+ * On the decoder, if provided with a resolution on the input
+ * side, then replicate that to the output side.
+ * GStreamer appears not to support V4L2_EVENT_SOURCE_CHANGE,
+ * nor set up a resolution on the output side, therefore
+ * we can't decode anything at a resolution other than the
+ * default one.
+ */
+ struct bcm2835_codec_q_data *q_data_dst =
+ &ctx->q_data[V4L2_M2M_DST];
+
+ q_data_dst->crop_width = q_data->crop_width;
+ q_data_dst->crop_height = q_data->crop_height;
+ q_data_dst->height = ALIGN(q_data->crop_height, 16);
+
+ q_data_dst->bytesperline =
+ get_bytesperline(f->fmt.pix.width, q_data_dst->fmt);
+ q_data_dst->sizeimage = get_sizeimage(q_data_dst->bytesperline,
+ q_data_dst->height,
+ q_data_dst->fmt);
+ update_capture_port = true;
+ }
+
+ /* If we have a component then setup the port as well */
+ port = get_port_data(ctx, vq->type);
+ if (!port)
+ return 0;
+
+ setup_mmal_port_format(ctx, ctx->dev->decode, q_data, port);
+ ret = vchiq_mmal_port_set_format(ctx->dev->instance, port);
+ if (ret) {
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Failed vchiq_mmal_port_set_format on port, ret %d\n",
+ __func__, ret);
+ ret = -EINVAL;
+ }
+
+ if (q_data->sizeimage < port->minimum_buffer.size) {
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Current buffer size of %u < min buf size %u - driver mismatch to MMAL\n",
+ __func__, q_data->sizeimage,
+ port->minimum_buffer.size);
+ }
+
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "Set format for type %d, wxh: %dx%d, fmt: %08x, size %u\n",
+ f->type, q_data->crop_width, q_data->height,
+ q_data->fmt->fourcc, q_data->sizeimage);
+
+ if (update_capture_port) {
+ struct vchiq_mmal_port *port_dst = &ctx->component->output[0];
+ struct bcm2835_codec_q_data *q_data_dst =
+ &ctx->q_data[V4L2_M2M_DST];
+
+ setup_mmal_port_format(ctx, ctx->dev->decode, q_data_dst,
+ port_dst);
+ ret = vchiq_mmal_port_set_format(ctx->dev->instance, port_dst);
+ if (ret) {
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Failed vchiq_mmal_port_set_format on output port, ret %d\n",
+ __func__, ret);
+ ret = -EINVAL;
+ }
+ }
+ return ret;
+}
+
+static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ unsigned int height = f->fmt.pix.height;
+ int ret;
+
+ ret = vidioc_try_fmt_vid_cap(file, priv, f);
+ if (ret)
+ return ret;
+
+ return vidioc_s_fmt(file2ctx(file), f, height);
+}
+
+static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ unsigned int height = f->fmt.pix.height;
+ int ret;
+
+ ret = vidioc_try_fmt_vid_out(file, priv, f);
+ if (ret)
+ return ret;
+
+ ret = vidioc_s_fmt(file2ctx(file), f, height);
+ return ret;
+}
+
+static int vidioc_g_selection(struct file *file, void *priv,
+ struct v4l2_selection *s)
+{
+ struct bcm2835_codec_ctx *ctx = file2ctx(file);
+ struct bcm2835_codec_q_data *q_data;
+ bool capture_queue = s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ?
+ true : false;
+
+ if (capture_queue ^ ctx->dev->decode)
+ /* OUTPUT on decoder and CAPTURE on encoder are not valid. */
+ return -EINVAL;
+
+ q_data = get_q_data(ctx, s->type);
+ if (!q_data)
+ return -EINVAL;
+
+ if (ctx->dev->decode) {
+ switch (s->target) {
+ case V4L2_SEL_TGT_COMPOSE_DEFAULT:
+ case V4L2_SEL_TGT_COMPOSE:
+ s->r.left = 0;
+ s->r.top = 0;
+ s->r.width = q_data->crop_width;
+ s->r.height = q_data->crop_height;
+ break;
+ case V4L2_SEL_TGT_COMPOSE_BOUNDS:
+ s->r.left = 0;
+ s->r.top = 0;
+ s->r.width = q_data->crop_width;
+ s->r.height = q_data->crop_height;
+ break;
+ default:
+ return -EINVAL;
+ }
+ } else {
+ switch (s->target) {
+ case V4L2_SEL_TGT_CROP_DEFAULT:
+ case V4L2_SEL_TGT_CROP_BOUNDS:
+ s->r.top = 0;
+ s->r.left = 0;
+ s->r.width = q_data->bytesperline;
+ s->r.height = q_data->height;
+ break;
+ case V4L2_SEL_TGT_CROP:
+ s->r.top = 0;
+ s->r.left = 0;
+ s->r.width = q_data->crop_width;
+ s->r.height = q_data->crop_height;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static int vidioc_s_selection(struct file *file, void *priv,
+ struct v4l2_selection *s)
+{
+ struct bcm2835_codec_ctx *ctx = file2ctx(file);
+ struct bcm2835_codec_q_data *q_data = NULL;
+ bool capture_queue = s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ?
+ true : false;
+
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "%s: ctx %p, type %d, q_data %p, target %d, rect x/y %d/%d, w/h %ux%u\n",
+ __func__, ctx, s->type, q_data, s->target, s->r.left, s->r.top,
+ s->r.width, s->r.height);
+
+ if (capture_queue ^ ctx->dev->decode)
+ /* OUTPUT on decoder and CAPTURE on encoder are not valid. */
+ return -EINVAL;
+
+ q_data = get_q_data(ctx, s->type);
+ if (!q_data)
+ return -EINVAL;
+
+ if (ctx->dev->decode) {
+ switch (s->target) {
+ case V4L2_SEL_TGT_COMPOSE:
+ /* Accept cropped image */
+ s->r.left = 0;
+ s->r.top = 0;
+ s->r.width = min(s->r.width, q_data->crop_width);
+ s->r.height = min(s->r.height, q_data->height);
+ q_data->crop_width = s->r.width;
+ q_data->crop_height = s->r.height;
+ q_data->selection_set = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+ } else {
+ switch (s->target) {
+ case V4L2_SEL_TGT_CROP:
+ /* Only support crop from (0,0) */
+ s->r.top = 0;
+ s->r.left = 0;
+ s->r.width = min(s->r.width, q_data->crop_width);
+ s->r.height = min(s->r.height, q_data->crop_height);
+ q_data->crop_width = s->r.width;
+ q_data->crop_height = s->r.height;
+ q_data->selection_set = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static int vidioc_subscribe_evt(struct v4l2_fh *fh,
+ const struct v4l2_event_subscription *sub)
+{
+ switch (sub->type) {
+ case V4L2_EVENT_EOS:
+ return v4l2_event_subscribe(fh, sub, 2, NULL);
+ case V4L2_EVENT_SOURCE_CHANGE:
+ return v4l2_src_change_event_subscribe(fh, sub);
+ default:
+ return v4l2_ctrl_subscribe_event(fh, sub);
+ }
+}
+
+static int bcm2835_codec_set_level_profile(struct bcm2835_codec_ctx *ctx,
+ struct v4l2_ctrl *ctrl)
+{
+ struct mmal_parameter_video_profile param;
+ int param_size = sizeof(param);
+ int ret;
+
+ /*
+ * Level and Profile are set via the same MMAL parameter.
+ * Retrieve the current settings and amend the one that has changed.
+ */
+ ret = vchiq_mmal_port_parameter_get(ctx->dev->instance,
+ &ctx->component->output[0],
+ MMAL_PARAMETER_PROFILE,
+ &param,
+ &param_size);
+ if (ret)
+ return ret;
+
+ switch (ctrl->id) {
+ case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
+ switch (ctrl->val) {
+ case V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE:
+ param.profile = MMAL_VIDEO_PROFILE_H264_BASELINE;
+ break;
+ case V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_BASELINE:
+ param.profile =
+ MMAL_VIDEO_PROFILE_H264_CONSTRAINED_BASELINE;
+ break;
+ case V4L2_MPEG_VIDEO_H264_PROFILE_MAIN:
+ param.profile = MMAL_VIDEO_PROFILE_H264_MAIN;
+ break;
+ case V4L2_MPEG_VIDEO_H264_PROFILE_HIGH:
+ param.profile = MMAL_VIDEO_PROFILE_H264_HIGH;
+ break;
+ default:
+ /* Should never get here */
+ break;
+ }
+ break;
+
+ case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
+ switch (ctrl->val) {
+ case V4L2_MPEG_VIDEO_H264_LEVEL_1_0:
+ param.level = MMAL_VIDEO_LEVEL_H264_1;
+ break;
+ case V4L2_MPEG_VIDEO_H264_LEVEL_1B:
+ param.level = MMAL_VIDEO_LEVEL_H264_1b;
+ break;
+ case V4L2_MPEG_VIDEO_H264_LEVEL_1_1:
+ param.level = MMAL_VIDEO_LEVEL_H264_11;
+ break;
+ case V4L2_MPEG_VIDEO_H264_LEVEL_1_2:
+ param.level = MMAL_VIDEO_LEVEL_H264_12;
+ break;
+ case V4L2_MPEG_VIDEO_H264_LEVEL_1_3:
+ param.level = MMAL_VIDEO_LEVEL_H264_13;
+ break;
+ case V4L2_MPEG_VIDEO_H264_LEVEL_2_0:
+ param.level = MMAL_VIDEO_LEVEL_H264_2;
+ break;
+ case V4L2_MPEG_VIDEO_H264_LEVEL_2_1:
+ param.level = MMAL_VIDEO_LEVEL_H264_21;
+ break;
+ case V4L2_MPEG_VIDEO_H264_LEVEL_2_2:
+ param.level = MMAL_VIDEO_LEVEL_H264_22;
+ break;
+ case V4L2_MPEG_VIDEO_H264_LEVEL_3_0:
+ param.level = MMAL_VIDEO_LEVEL_H264_3;
+ break;
+ case V4L2_MPEG_VIDEO_H264_LEVEL_3_1:
+ param.level = MMAL_VIDEO_LEVEL_H264_31;
+ break;
+ case V4L2_MPEG_VIDEO_H264_LEVEL_3_2:
+ param.level = MMAL_VIDEO_LEVEL_H264_32;
+ break;
+ case V4L2_MPEG_VIDEO_H264_LEVEL_4_0:
+ param.level = MMAL_VIDEO_LEVEL_H264_4;
+ break;
+ default:
+ /* Should never get here */
+ break;
+ }
+ }
+ ret = vchiq_mmal_port_parameter_set(ctx->dev->instance,
+ &ctx->component->output[0],
+ MMAL_PARAMETER_PROFILE,
+ &param,
+ param_size);
+
+ return ret;
+}
+
+static int bcm2835_codec_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct bcm2835_codec_ctx *ctx =
+ container_of(ctrl->handler, struct bcm2835_codec_ctx, hdl);
+ int ret = 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_MPEG_VIDEO_BITRATE:
+ ctx->bitrate = ctrl->val;
+ if (!ctx->component)
+ break;
+
+ ret = vchiq_mmal_port_parameter_set(ctx->dev->instance,
+ &ctx->component->output[0],
+ MMAL_PARAMETER_VIDEO_BIT_RATE,
+ &ctrl->val,
+ sizeof(ctrl->val));
+ break;
+
+ case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: {
+ u32 bitrate_mode;
+
+ if (!ctx->component)
+ break;
+
+ switch (ctrl->val) {
+ default:
+ case V4L2_MPEG_VIDEO_BITRATE_MODE_VBR:
+ bitrate_mode = MMAL_VIDEO_RATECONTROL_VARIABLE;
+ break;
+ case V4L2_MPEG_VIDEO_BITRATE_MODE_CBR:
+ bitrate_mode = MMAL_VIDEO_RATECONTROL_CONSTANT;
+ break;
+ }
+
+ ret = vchiq_mmal_port_parameter_set(ctx->dev->instance,
+ &ctx->component->output[0],
+ MMAL_PARAMETER_RATECONTROL,
+ &bitrate_mode,
+ sizeof(bitrate_mode));
+ break;
+ }
+ case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER:
+ if (!ctx->component)
+ break;
+
+ ret = vchiq_mmal_port_parameter_set(ctx->dev->instance,
+ &ctx->component->output[0],
+ MMAL_PARAMETER_VIDEO_ENCODE_INLINE_HEADER,
+ &ctrl->val,
+ sizeof(ctrl->val));
+ break;
+
+ case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD:
+ if (!ctx->component)
+ break;
+
+ ret = vchiq_mmal_port_parameter_set(ctx->dev->instance,
+ &ctx->component->output[0],
+ MMAL_PARAMETER_INTRAPERIOD,
+ &ctrl->val,
+ sizeof(ctrl->val));
+ break;
+
+ case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
+ case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
+ if (!ctx->component)
+ break;
+
+ ret = bcm2835_codec_set_level_profile(ctx, ctrl);
+ break;
+
+ default:
+ v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n");
+ return -EINVAL;
+ }
+
+ if (ret)
+ v4l2_err(&ctx->dev->v4l2_dev, "Failed setting ctrl %08x, ret %d\n",
+ ctrl->id, ret);
+ return ret ? -EINVAL : 0;
+}
+
+static const struct v4l2_ctrl_ops bcm2835_codec_ctrl_ops = {
+ .s_ctrl = bcm2835_codec_s_ctrl,
+};
+
+static int vidioc_try_decoder_cmd(struct file *file, void *priv,
+ struct v4l2_decoder_cmd *cmd)
+{
+ struct bcm2835_codec_ctx *ctx = file2ctx(file);
+
+ if (!ctx->dev->decode)
+ return -EINVAL;
+
+ switch (cmd->cmd) {
+ case V4L2_DEC_CMD_STOP:
+ if (cmd->flags & V4L2_DEC_CMD_STOP_TO_BLACK) {
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: DEC cmd->flags=%u stop to black not supported",
+ __func__, cmd->flags);
+ return -EINVAL;
+ }
+ break;
+ case V4L2_DEC_CMD_START:
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int vidioc_decoder_cmd(struct file *file, void *priv,
+ struct v4l2_decoder_cmd *cmd)
+{
+ struct bcm2835_codec_ctx *ctx = file2ctx(file);
+ struct bcm2835_codec_q_data *q_data = &ctx->q_data[V4L2_M2M_SRC];
+ int ret;
+
+ v4l2_dbg(2, debug, &ctx->dev->v4l2_dev, "%s, cmd %u", __func__,
+ cmd->cmd);
+ ret = vidioc_try_decoder_cmd(file, priv, cmd);
+ if (ret)
+ return ret;
+
+ switch (cmd->cmd) {
+ case V4L2_DEC_CMD_STOP:
+ if (q_data->eos_buffer_in_use)
+ v4l2_err(&ctx->dev->v4l2_dev, "EOS buffers already in use\n");
+ q_data->eos_buffer_in_use = true;
+
+ q_data->eos_buffer.mmal.buffer_size = 0;
+ q_data->eos_buffer.mmal.length = 0;
+ q_data->eos_buffer.mmal.mmal_flags =
+ MMAL_BUFFER_HEADER_FLAG_EOS;
+ q_data->eos_buffer.mmal.pts = 0;
+ q_data->eos_buffer.mmal.dts = 0;
+
+ if (!ctx->component)
+ break;
+
+ ret = vchiq_mmal_submit_buffer(ctx->dev->instance,
+ &ctx->component->input[0],
+ &q_data->eos_buffer.mmal);
+ if (ret)
+ v4l2_err(&ctx->dev->v4l2_dev,
+ "%s: EOS buffer submit failed %d\n",
+ __func__, ret);
+
+ break;
+
+ case V4L2_DEC_CMD_START:
+ /* Do we need to do anything here? */
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int vidioc_try_encoder_cmd(struct file *file, void *priv,
+ struct v4l2_encoder_cmd *cmd)
+{
+ struct bcm2835_codec_ctx *ctx = file2ctx(file);
+
+ if (ctx->dev->decode)
+ return -EINVAL;
+
+ switch (cmd->cmd) {
+ case V4L2_ENC_CMD_STOP:
+ break;
+
+ case V4L2_ENC_CMD_START:
+ /* Do we need to do anything here? */
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int vidioc_encoder_cmd(struct file *file, void *priv,
+ struct v4l2_encoder_cmd *cmd)
+{
+ struct bcm2835_codec_ctx *ctx = file2ctx(file);
+ struct bcm2835_codec_q_data *q_data = &ctx->q_data[V4L2_M2M_SRC];
+ int ret;
+
+ v4l2_dbg(2, debug, &ctx->dev->v4l2_dev, "%s, cmd %u", __func__,
+ cmd->cmd);
+ ret = vidioc_try_encoder_cmd(file, priv, cmd);
+ if (ret)
+ return ret;
+
+ switch (cmd->cmd) {
+ case V4L2_ENC_CMD_STOP:
+ if (q_data->eos_buffer_in_use)
+ v4l2_err(&ctx->dev->v4l2_dev, "EOS buffers already in use\n");
+ q_data->eos_buffer_in_use = true;
+
+ q_data->eos_buffer.mmal.buffer_size = 0;
+ q_data->eos_buffer.mmal.length = 0;
+ q_data->eos_buffer.mmal.mmal_flags =
+ MMAL_BUFFER_HEADER_FLAG_EOS;
+ q_data->eos_buffer.mmal.pts = 0;
+ q_data->eos_buffer.mmal.dts = 0;
+
+ if (!ctx->component)
+ break;
+
+ ret = vchiq_mmal_submit_buffer(ctx->dev->instance,
+ &ctx->component->input[0],
+ &q_data->eos_buffer.mmal);
+ if (ret)
+ v4l2_err(&ctx->dev->v4l2_dev,
+ "%s: EOS buffer submit failed %d\n",
+ __func__, ret);
+
+ break;
+ case V4L2_ENC_CMD_START:
+ /* Do we need to do anything here? */
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops bcm2835_codec_ioctl_ops = {
+ .vidioc_querycap = vidioc_querycap,
+
+ .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
+
+ .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
+ .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
+ .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
+ .vidioc_s_fmt_vid_out = 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_g_selection = vidioc_g_selection,
+ .vidioc_s_selection = vidioc_s_selection,
+
+ .vidioc_subscribe_event = vidioc_subscribe_evt,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+
+ .vidioc_decoder_cmd = vidioc_decoder_cmd,
+ .vidioc_try_decoder_cmd = vidioc_try_decoder_cmd,
+ .vidioc_encoder_cmd = vidioc_encoder_cmd,
+ .vidioc_try_encoder_cmd = vidioc_try_encoder_cmd,
+};
+
+static int bcm2835_codec_set_ctrls(struct bcm2835_codec_ctx *ctx)
+{
+ /*
+ * Query the control handler for the value of the various controls and
+ * set them.
+ */
+ const u32 control_ids[] = {
+ V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
+ V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER,
+ V4L2_CID_MPEG_VIDEO_H264_I_PERIOD,
+ V4L2_CID_MPEG_VIDEO_H264_LEVEL,
+ V4L2_CID_MPEG_VIDEO_H264_PROFILE,
+ };
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(control_ids); i++) {
+ struct v4l2_ctrl *ctrl;
+
+ ctrl = v4l2_ctrl_find(&ctx->hdl, control_ids[i]);
+ if (ctrl)
+ bcm2835_codec_s_ctrl(ctrl);
+ }
+
+ return 0;
+}
+
+static int bcm2835_codec_create_component(struct bcm2835_codec_ctx *ctx)
+{
+ struct bcm2835_codec_dev *dev = ctx->dev;
+ unsigned int enable = 1;
+ int ret;
+
+ ret = vchiq_mmal_component_init(dev->instance, dev->decode ?
+ "ril.video_decode" : "ril.video_encode",
+ &ctx->component);
+ if (ret < 0) {
+ v4l2_err(&dev->v4l2_dev, "%s: failed to create component for %s\n",
+ __func__, dev->decode ? "decode" : "encode");
+ return -ENOMEM;
+ }
+
+ vchiq_mmal_port_parameter_set(dev->instance, &ctx->component->input[0],
+ MMAL_PARAMETER_ZERO_COPY, &enable,
+ sizeof(enable));
+ vchiq_mmal_port_parameter_set(dev->instance, &ctx->component->output[0],
+ MMAL_PARAMETER_ZERO_COPY, &enable,
+ sizeof(enable));
+
+ setup_mmal_port_format(ctx, dev->decode, &ctx->q_data[V4L2_M2M_SRC],
+ &ctx->component->input[0]);
+
+ setup_mmal_port_format(ctx, dev->decode, &ctx->q_data[V4L2_M2M_DST],
+ &ctx->component->output[0]);
+
+ ret = vchiq_mmal_port_set_format(dev->instance,
+ &ctx->component->input[0]);
+ if (ret < 0)
+ goto destroy_component;
+
+ ret = vchiq_mmal_port_set_format(dev->instance,
+ &ctx->component->output[0]);
+ if (ret < 0)
+ goto destroy_component;
+
+ if (dev->decode) {
+ if (ctx->q_data[V4L2_M2M_DST].sizeimage <
+ ctx->component->output[0].minimum_buffer.size)
+ v4l2_err(&dev->v4l2_dev, "buffer size mismatch sizeimage %u < min size %u\n",
+ ctx->q_data[V4L2_M2M_DST].sizeimage,
+ ctx->component->output[0].minimum_buffer.size);
+ } else {
+ if (ctx->q_data[V4L2_M2M_SRC].sizeimage <
+ ctx->component->output[0].minimum_buffer.size)
+ v4l2_err(&dev->v4l2_dev, "buffer size mismatch sizeimage %u < min size %u\n",
+ ctx->q_data[V4L2_M2M_SRC].sizeimage,
+ ctx->component->output[0].minimum_buffer.size);
+
+ /* Now we have a component we can set all the ctrls */
+ bcm2835_codec_set_ctrls(ctx);
+ }
+
+ return 0;
+
+destroy_component:
+ vchiq_mmal_component_finalise(ctx->dev->instance, ctx->component);
+
+ return ret;
+}
+
+/*
+ * Queue operations
+ */
+
+static int bcm2835_codec_queue_setup(struct vb2_queue *vq,
+ unsigned int *nbuffers,
+ unsigned int *nplanes,
+ unsigned int sizes[],
+ struct device *alloc_devs[])
+{
+ struct bcm2835_codec_ctx *ctx = vb2_get_drv_priv(vq);
+ struct bcm2835_codec_q_data *q_data;
+ struct vchiq_mmal_port *port;
+ unsigned int size;
+
+ q_data = get_q_data(ctx, vq->type);
+ if (!q_data)
+ return -EINVAL;
+
+ if (!ctx->component)
+ if (bcm2835_codec_create_component(ctx))
+ return -EINVAL;
+
+ port = get_port_data(ctx, vq->type);
+
+ size = q_data->sizeimage;
+
+ if (*nplanes)
+ return sizes[0] < size ? -EINVAL : 0;
+
+ *nplanes = 1;
+
+ sizes[0] = size;
+ port->current_buffer.size = size;
+
+ if (*nbuffers < port->minimum_buffer.num)
+ *nbuffers = port->minimum_buffer.num;
+ /* Add one buffer to take an EOS */
+ port->current_buffer.num = *nbuffers + 1;
+
+ return 0;
+}
+
+static int bcm2835_codec_buf_init(struct vb2_buffer *vb)
+{
+ struct bcm2835_codec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+ struct vb2_v4l2_buffer *vb2 = to_vb2_v4l2_buffer(vb);
+ struct v4l2_m2m_buffer *m2m = container_of(vb2, struct v4l2_m2m_buffer,
+ vb);
+ struct m2m_mmal_buffer *buf = container_of(m2m, struct m2m_mmal_buffer,
+ m2m);
+
+ v4l2_dbg(2, debug, &ctx->dev->v4l2_dev, "%s: ctx:%p, vb %p\n",
+ __func__, ctx, vb);
+ buf->mmal.buffer = vb2_plane_vaddr(&buf->m2m.vb.vb2_buf, 0);
+ buf->mmal.buffer_size = vb2_plane_size(&buf->m2m.vb.vb2_buf, 0);
+
+ mmal_vchi_buffer_init(ctx->dev->instance, &buf->mmal);
+
+ return 0;
+}
+
+static int bcm2835_codec_buf_prepare(struct vb2_buffer *vb)
+{
+ struct bcm2835_codec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+ struct bcm2835_codec_q_data *q_data;
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct v4l2_m2m_buffer *m2m = container_of(vbuf, struct v4l2_m2m_buffer,
+ vb);
+ struct m2m_mmal_buffer *buf = container_of(m2m, struct m2m_mmal_buffer,
+ m2m);
+ int ret;
+
+ v4l2_dbg(4, debug, &ctx->dev->v4l2_dev, "%s: type: %d ptr %p\n",
+ __func__, vb->vb2_queue->type, vb);
+
+ q_data = get_q_data(ctx, vb->vb2_queue->type);
+ if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
+ if (vbuf->field == V4L2_FIELD_ANY)
+ vbuf->field = V4L2_FIELD_NONE;
+ if (vbuf->field != V4L2_FIELD_NONE) {
+ v4l2_err(&ctx->dev->v4l2_dev, "%s field isn't supported\n",
+ __func__);
+ return -EINVAL;
+ }
+ }
+
+ if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
+ v4l2_err(&ctx->dev->v4l2_dev, "%s data will not fit into plane (%lu < %lu)\n",
+ __func__, vb2_plane_size(vb, 0),
+ (long)q_data->sizeimage);
+ return -EINVAL;
+ }
+
+ if (!V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type))
+ vb2_set_plane_payload(vb, 0, q_data->sizeimage);
+
+ /*
+ * We want to do this at init, but vb2_core_expbuf checks that the
+ * index < q->num_buffers, and q->num_buffers only gets updated once
+ * all the buffers are allocated.
+ */
+ if (!buf->mmal.dma_buf) {
+ ret = vb2_core_expbuf_dmabuf(vb->vb2_queue,
+ vb->vb2_queue->type, vb->index, 0,
+ O_CLOEXEC, &buf->mmal.dma_buf);
+ if (ret)
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Failed to expbuf idx %d, ret %d\n",
+ __func__, vb->index, ret);
+ } else {
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static void bcm2835_codec_buf_queue(struct vb2_buffer *vb)
+{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct bcm2835_codec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+
+ v4l2_dbg(4, debug, &ctx->dev->v4l2_dev, "%s: type: %d ptr %p vbuf->flags %u, seq %u, bytesused %u\n",
+ __func__, vb->vb2_queue->type, vb, vbuf->flags, vbuf->sequence,
+ vb->planes[0].bytesused);
+ v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
+}
+
+static void bcm2835_codec_buffer_cleanup(struct vb2_buffer *vb)
+{
+ struct bcm2835_codec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+ struct vb2_v4l2_buffer *vb2 = to_vb2_v4l2_buffer(vb);
+ struct v4l2_m2m_buffer *m2m = container_of(vb2, struct v4l2_m2m_buffer,
+ vb);
+ struct m2m_mmal_buffer *buf = container_of(m2m, struct m2m_mmal_buffer,
+ m2m);
+
+ v4l2_dbg(2, debug, &ctx->dev->v4l2_dev, "%s: ctx:%p, vb %p\n",
+ __func__, ctx, vb);
+
+ mmal_vchi_buffer_cleanup(&buf->mmal);
+
+ if (buf->mmal.dma_buf) {
+ dma_buf_put(buf->mmal.dma_buf);
+ buf->mmal.dma_buf = NULL;
+ }
+}
+
+static int bcm2835_codec_start_streaming(struct vb2_queue *q,
+ unsigned int count)
+{
+ struct bcm2835_codec_ctx *ctx = vb2_get_drv_priv(q);
+ struct bcm2835_codec_dev *dev = ctx->dev;
+ struct bcm2835_codec_q_data *q_data = get_q_data(ctx, q->type);
+ int ret;
+
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "%s: type: %d count %d\n",
+ __func__, q->type, count);
+ q_data->sequence = 0;
+
+ if (!ctx->component_enabled) {
+ ret = vchiq_mmal_component_enable(dev->instance,
+ ctx->component);
+ if (ret)
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Failed enabling component, ret %d\n",
+ __func__, ret);
+ ctx->component_enabled = true;
+ }
+
+ if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
+ /*
+ * Create the EOS buffer.
+ * We only need the MMAL part, and want to NOT attach a memory
+ * buffer to it as it should only take flags.
+ */
+ memset(&q_data->eos_buffer, 0, sizeof(q_data->eos_buffer));
+ mmal_vchi_buffer_init(dev->instance,
+ &q_data->eos_buffer.mmal);
+ q_data->eos_buffer_in_use = false;
+
+ ctx->component->input[0].cb_ctx = ctx;
+ ret = vchiq_mmal_port_enable(dev->instance,
+ &ctx->component->input[0],
+ ip_buffer_cb);
+ if (ret)
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Failed enabling i/p port, ret %d\n",
+ __func__, ret);
+ } else {
+ ctx->component->output[0].cb_ctx = ctx;
+ ret = vchiq_mmal_port_enable(dev->instance,
+ &ctx->component->output[0],
+ op_buffer_cb);
+ if (ret)
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Failed enabling o/p port, ret %d\n",
+ __func__, ret);
+ }
+ return ret;
+}
+
+static void bcm2835_codec_stop_streaming(struct vb2_queue *q)
+{
+ struct bcm2835_codec_ctx *ctx = vb2_get_drv_priv(q);
+ struct bcm2835_codec_dev *dev = ctx->dev;
+ struct bcm2835_codec_q_data *q_data = get_q_data(ctx, q->type);
+ struct vchiq_mmal_port *port = get_port_data(ctx, q->type);
+ struct vb2_v4l2_buffer *vbuf;
+ struct vb2_v4l2_buffer *vb2;
+ struct v4l2_m2m_buffer *m2m;
+ struct m2m_mmal_buffer *buf;
+ int ret, i;
+
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "%s: type: %d - return buffers\n",
+ __func__, q->type);
+
+ init_completion(&ctx->frame_cmplt);
+
+ /* Clear out all buffers held by m2m framework */
+ 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)
+ break;
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "%s: return buffer %p\n",
+ __func__, vbuf);
+
+ v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
+ }
+
+ /* Disable MMAL port - this will flush buffers back */
+ ret = vchiq_mmal_port_disable(dev->instance, port);
+ if (ret)
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Failed disabling %s port, ret %d\n",
+ __func__, V4L2_TYPE_IS_OUTPUT(q->type) ? "i/p" : "o/p",
+ ret);
+
+ while (atomic_read(&port->buffers_with_vpu)) {
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "%s: Waiting for buffers to be returned - %d outstanding\n",
+ __func__, atomic_read(&port->buffers_with_vpu));
+ ret = wait_for_completion_timeout(&ctx->frame_cmplt, HZ);
+ if (ret <= 0) {
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Timeout waiting for buffers to be returned - %d outstanding\n",
+ __func__,
+ atomic_read(&port->buffers_with_vpu));
+ break;
+ }
+ }
+
+ /*
+ * Release the VCSM handle here as otherwise REQBUFS(0) aborts because
+ * someone is using the dmabuf before giving the driver a chance to do
+ * anything about it.
+ */
+ for (i = 0; i < q->num_buffers; i++) {
+ vb2 = to_vb2_v4l2_buffer(q->bufs[i]);
+ m2m = container_of(vb2, struct v4l2_m2m_buffer, vb);
+ buf = container_of(m2m, struct m2m_mmal_buffer, m2m);
+
+ mmal_vchi_buffer_cleanup(&buf->mmal);
+ if (buf->mmal.dma_buf) {
+ dma_buf_put(buf->mmal.dma_buf);
+ buf->mmal.dma_buf = NULL;
+ }
+ }
+
+ /* If both ports disabled, then disable the component */
+ if (!ctx->component->input[0].enabled &&
+ !ctx->component->output[0].enabled) {
+ ret = vchiq_mmal_component_disable(dev->instance,
+ ctx->component);
+ if (ret)
+ v4l2_err(&ctx->dev->v4l2_dev, "%s: Failed enabling component, ret %d\n",
+ __func__, ret);
+ }
+
+ if (V4L2_TYPE_IS_OUTPUT(q->type))
+ mmal_vchi_buffer_cleanup(&q_data->eos_buffer.mmal);
+
+ v4l2_dbg(1, debug, &ctx->dev->v4l2_dev, "%s: done\n", __func__);
+}
+
+static const struct vb2_ops bcm2835_codec_qops = {
+ .queue_setup = bcm2835_codec_queue_setup,
+ .buf_init = bcm2835_codec_buf_init,
+ .buf_prepare = bcm2835_codec_buf_prepare,
+ .buf_queue = bcm2835_codec_buf_queue,
+ .buf_cleanup = bcm2835_codec_buffer_cleanup,
+ .start_streaming = bcm2835_codec_start_streaming,
+ .stop_streaming = bcm2835_codec_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+static int queue_init(void *priv, struct vb2_queue *src_vq,
+ struct vb2_queue *dst_vq)
+{
+ struct bcm2835_codec_ctx *ctx = priv;
+ int ret;
+
+ src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+ src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
+ src_vq->drv_priv = ctx;
+ src_vq->buf_struct_size = sizeof(struct m2m_mmal_buffer);
+ src_vq->ops = &bcm2835_codec_qops;
+ src_vq->mem_ops = &vb2_dma_contig_memops;
+ src_vq->dev = &ctx->dev->pdev->dev;
+ src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ src_vq->lock = &ctx->dev->dev_mutex;
+
+ ret = vb2_queue_init(src_vq);
+ if (ret)
+ return ret;
+
+ dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
+ dst_vq->drv_priv = ctx;
+ dst_vq->buf_struct_size = sizeof(struct m2m_mmal_buffer);
+ dst_vq->ops = &bcm2835_codec_qops;
+ dst_vq->mem_ops = &vb2_dma_contig_memops;
+ dst_vq->dev = &ctx->dev->pdev->dev;
+ dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ dst_vq->lock = &ctx->dev->dev_mutex;
+
+ return vb2_queue_init(dst_vq);
+}
+
+/*
+ * File operations
+ */
+static int bcm2835_codec_open(struct file *file)
+{
+ struct bcm2835_codec_dev *dev = video_drvdata(file);
+ struct bcm2835_codec_ctx *ctx = NULL;
+ struct v4l2_ctrl_handler *hdl;
+ int rc = 0;
+
+ v4l2_dbg(1, debug, &dev->v4l2_dev, "Creating instance for %s\n",
+ dev->decode ? "decode" : "encode");
+ if (mutex_lock_interruptible(&dev->dev_mutex)) {
+ v4l2_err(&dev->v4l2_dev, "Mutex fail\n");
+ return -ERESTARTSYS;
+ }
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx) {
+ rc = -ENOMEM;
+ goto open_unlock;
+ }
+
+ ctx->q_data[V4L2_M2M_SRC].fmt = get_default_format(dev->decode, false);
+ ctx->q_data[V4L2_M2M_DST].fmt = get_default_format(dev->decode, true);
+ if (dev->decode) {
+ /*
+ * Input width and height are irrelevant as they will be defined
+ * by the bitstream not the format. Required by V4L2 though.
+ */
+ ctx->q_data[V4L2_M2M_SRC].crop_width = DEFAULT_WIDTH;
+ ctx->q_data[V4L2_M2M_SRC].crop_height = DEFAULT_HEIGHT;
+ ctx->q_data[V4L2_M2M_SRC].height = DEFAULT_HEIGHT;
+ ctx->q_data[V4L2_M2M_SRC].bytesperline = 0;
+ ctx->q_data[V4L2_M2M_SRC].sizeimage =
+ DEF_COMP_BUF_SIZE_720P_OR_LESS;
+
+ ctx->q_data[V4L2_M2M_DST].crop_width = DEFAULT_WIDTH;
+ ctx->q_data[V4L2_M2M_DST].crop_height = DEFAULT_HEIGHT;
+ ctx->q_data[V4L2_M2M_DST].height = DEFAULT_HEIGHT;
+ ctx->q_data[V4L2_M2M_DST].bytesperline =
+ get_bytesperline(DEFAULT_WIDTH,
+ ctx->q_data[V4L2_M2M_DST].fmt);
+ ctx->q_data[V4L2_M2M_DST].sizeimage =
+ get_sizeimage(ctx->q_data[V4L2_M2M_DST].bytesperline,
+ ctx->q_data[V4L2_M2M_DST].height,
+ ctx->q_data[V4L2_M2M_DST].fmt);
+ } else {
+ ctx->q_data[V4L2_M2M_SRC].crop_width = DEFAULT_WIDTH;
+ ctx->q_data[V4L2_M2M_SRC].crop_height = DEFAULT_HEIGHT;
+ ctx->q_data[V4L2_M2M_SRC].height = DEFAULT_HEIGHT;
+ ctx->q_data[V4L2_M2M_SRC].bytesperline =
+ get_bytesperline(DEFAULT_WIDTH,
+ ctx->q_data[V4L2_M2M_SRC].fmt);
+ ctx->q_data[V4L2_M2M_SRC].sizeimage =
+ get_sizeimage(ctx->q_data[V4L2_M2M_SRC].bytesperline,
+ ctx->q_data[V4L2_M2M_SRC].height,
+ ctx->q_data[V4L2_M2M_SRC].fmt);
+
+ ctx->q_data[V4L2_M2M_DST].crop_width = DEFAULT_WIDTH;
+ ctx->q_data[V4L2_M2M_DST].crop_height = DEFAULT_HEIGHT;
+ ctx->q_data[V4L2_M2M_DST].bytesperline = 0;
+ ctx->q_data[V4L2_M2M_DST].height = DEFAULT_HEIGHT;
+ ctx->q_data[V4L2_M2M_DST].sizeimage =
+ DEF_COMP_BUF_SIZE_720P_OR_LESS;
+ }
+
+ ctx->colorspace = V4L2_COLORSPACE_REC709;
+ ctx->bitrate = 10 * 1000 * 1000;
+
+ /* Initialise V4L2 contexts */
+ v4l2_fh_init(&ctx->fh, video_devdata(file));
+ file->private_data = &ctx->fh;
+ ctx->dev = dev;
+ hdl = &ctx->hdl;
+ if (!dev->decode) {
+ /* Encode controls */
+ v4l2_ctrl_handler_init(hdl, 6);
+
+ v4l2_ctrl_new_std_menu(hdl, &bcm2835_codec_ctrl_ops,
+ V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
+ V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 0,
+ V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
+ v4l2_ctrl_new_std(hdl, &bcm2835_codec_ctrl_ops,
+ V4L2_CID_MPEG_VIDEO_BITRATE,
+ 25 * 1000, 25 * 1000 * 1000,
+ 25 * 1000, 10 * 1000 * 1000);
+ v4l2_ctrl_new_std(hdl, &bcm2835_codec_ctrl_ops,
+ V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER,
+ 0, 1,
+ 1, 0);
+ v4l2_ctrl_new_std(hdl, &bcm2835_codec_ctrl_ops,
+ V4L2_CID_MPEG_VIDEO_H264_I_PERIOD,
+ 0, 0x7FFFFFFF,
+ 1, 60);
+ v4l2_ctrl_new_std_menu(hdl, &bcm2835_codec_ctrl_ops,
+ V4L2_CID_MPEG_VIDEO_H264_LEVEL,
+ V4L2_MPEG_VIDEO_H264_LEVEL_4_2,
+ ~(BIT(V4L2_MPEG_VIDEO_H264_LEVEL_1_0) |
+ BIT(V4L2_MPEG_VIDEO_H264_LEVEL_1B) |
+ BIT(V4L2_MPEG_VIDEO_H264_LEVEL_1_1) |
+ BIT(V4L2_MPEG_VIDEO_H264_LEVEL_1_2) |
+ BIT(V4L2_MPEG_VIDEO_H264_LEVEL_1_3) |
+ BIT(V4L2_MPEG_VIDEO_H264_LEVEL_2_0) |
+ BIT(V4L2_MPEG_VIDEO_H264_LEVEL_2_1) |
+ BIT(V4L2_MPEG_VIDEO_H264_LEVEL_2_2) |
+ BIT(V4L2_MPEG_VIDEO_H264_LEVEL_3_0) |
+ BIT(V4L2_MPEG_VIDEO_H264_LEVEL_3_1) |
+ BIT(V4L2_MPEG_VIDEO_H264_LEVEL_3_2) |
+ BIT(V4L2_MPEG_VIDEO_H264_LEVEL_4_0) |
+ BIT(V4L2_MPEG_VIDEO_H264_LEVEL_4_1) |
+ BIT(V4L2_MPEG_VIDEO_H264_LEVEL_4_2)),
+ V4L2_MPEG_VIDEO_H264_LEVEL_4_0);
+ v4l2_ctrl_new_std_menu(hdl, &bcm2835_codec_ctrl_ops,
+ V4L2_CID_MPEG_VIDEO_H264_PROFILE,
+ V4L2_MPEG_VIDEO_H264_PROFILE_HIGH,
+ ~(BIT(V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE) |
+ BIT(V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_BASELINE) |
+ BIT(V4L2_MPEG_VIDEO_H264_PROFILE_MAIN) |
+ BIT(V4L2_MPEG_VIDEO_H264_PROFILE_HIGH)),
+ V4L2_MPEG_VIDEO_H264_PROFILE_HIGH);
+ if (hdl->error) {
+ rc = hdl->error;
+ goto free_ctrl_handler;
+ }
+ 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);
+
+ goto free_ctrl_handler;
+ }
+
+ /* Set both queues as buffered as we have buffering in the VPU. That
+ * means that we will be scheduled whenever either an input or output
+ * buffer is available (otherwise one of each are required).
+ */
+ v4l2_m2m_set_src_buffered(ctx->fh.m2m_ctx, true);
+ v4l2_m2m_set_dst_buffered(ctx->fh.m2m_ctx, true);
+
+ v4l2_fh_add(&ctx->fh);
+ atomic_inc(&dev->num_inst);
+
+ mutex_unlock(&dev->dev_mutex);
+ return 0;
+
+free_ctrl_handler:
+ v4l2_ctrl_handler_free(hdl);
+ kfree(ctx);
+open_unlock:
+ mutex_unlock(&dev->dev_mutex);
+ return rc;
+}
+
+static int bcm2835_codec_release(struct file *file)
+{
+ struct bcm2835_codec_dev *dev = video_drvdata(file);
+ struct bcm2835_codec_ctx *ctx = file2ctx(file);
+
+ v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: Releasing instance %p\n",
+ __func__, 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);
+
+ if (ctx->component)
+ vchiq_mmal_component_finalise(dev->instance, ctx->component);
+
+ mutex_unlock(&dev->dev_mutex);
+ kfree(ctx);
+
+ atomic_dec(&dev->num_inst);
+
+ return 0;
+}
+
+static const struct v4l2_file_operations bcm2835_codec_fops = {
+ .owner = THIS_MODULE,
+ .open = bcm2835_codec_open,
+ .release = bcm2835_codec_release,
+ .poll = v4l2_m2m_fop_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = v4l2_m2m_fop_mmap,
+};
+
+static const struct video_device bcm2835_codec_videodev = {
+ .name = MEM2MEM_NAME,
+ .vfl_dir = VFL_DIR_M2M,
+ .fops = &bcm2835_codec_fops,
+ .ioctl_ops = &bcm2835_codec_ioctl_ops,
+ .minor = -1,
+ .release = video_device_release_empty,
+};
+
+static const struct v4l2_m2m_ops m2m_ops = {
+ .device_run = device_run,
+ .job_ready = job_ready,
+ .job_abort = job_abort,
+};
+
+static int bcm2835_codec_create(struct platform_device *pdev,
+ struct bcm2835_codec_dev **new_dev,
+ bool decode)
+{
+ struct bcm2835_codec_dev *dev;
+ struct video_device *vfd;
+ struct vchiq_mmal_instance *instance = NULL;
+ int video_nr;
+ int ret;
+
+ dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ dev->pdev = pdev;
+
+ dev->decode = decode;
+
+ ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
+ if (ret)
+ return ret;
+
+ atomic_set(&dev->num_inst, 0);
+ mutex_init(&dev->dev_mutex);
+
+ dev->vfd = bcm2835_codec_videodev;
+ vfd = &dev->vfd;
+ vfd->lock = &dev->dev_mutex;
+ vfd->v4l2_dev = &dev->v4l2_dev;
+
+ if (dev->decode) {
+ v4l2_disable_ioctl(vfd, VIDIOC_ENCODER_CMD);
+ v4l2_disable_ioctl(vfd, VIDIOC_TRY_ENCODER_CMD);
+ video_nr = decode_video_nr;
+ } else {
+ v4l2_disable_ioctl(vfd, VIDIOC_DECODER_CMD);
+ v4l2_disable_ioctl(vfd, VIDIOC_TRY_DECODER_CMD);
+ video_nr = encode_video_nr;
+ }
+
+ ret = video_register_device(vfd, VFL_TYPE_GRABBER, video_nr);
+ 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",
+ bcm2835_codec_videodev.name);
+ v4l2_info(&dev->v4l2_dev, "Device registered as /dev/video%d\n",
+ vfd->num);
+
+ *new_dev = 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;
+ }
+
+ ret = vchiq_mmal_init(&instance);
+ if (ret < 0)
+ goto err_m2m;
+ dev->instance = instance;
+
+ v4l2_info(&dev->v4l2_dev, "Loaded V4L2 %s codec\n",
+ dev->decode ? "decode" : "encode");
+ 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 bcm2835_codec_destroy(struct bcm2835_codec_dev *dev)
+{
+ if (!dev)
+ return -ENODEV;
+
+ v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_NAME);
+ v4l2_m2m_release(dev->m2m_dev);
+ video_unregister_device(&dev->vfd);
+ v4l2_device_unregister(&dev->v4l2_dev);
+
+ return 0;
+}
+
+static int bcm2835_codec_probe(struct platform_device *pdev)
+{
+ struct bcm2835_codec_driver *drv;
+ int ret = 0;
+
+ drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
+ if (!drv)
+ return -ENOMEM;
+
+ ret = bcm2835_codec_create(pdev, &drv->encode, false);
+ if (ret)
+ goto out;
+
+ ret = bcm2835_codec_create(pdev, &drv->decode, true);
+ if (ret)
+ goto out;
+
+ platform_set_drvdata(pdev, drv);
+
+ return 0;
+
+out:
+ if (drv->encode) {
+ bcm2835_codec_destroy(drv->encode);
+ drv->encode = NULL;
+ }
+ return ret;
+}
+
+static int bcm2835_codec_remove(struct platform_device *pdev)
+{
+ struct bcm2835_codec_driver *drv = platform_get_drvdata(pdev);
+
+ bcm2835_codec_destroy(drv->encode);
+
+ bcm2835_codec_destroy(drv->decode);
+
+ return 0;
+}
+
+static struct platform_driver bcm2835_v4l2_codec_driver = {
+ .probe = bcm2835_codec_probe,
+ .remove = bcm2835_codec_remove,
+ .driver = {
+ .name = "bcm2835-codec",
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(bcm2835_v4l2_codec_driver);
+
+MODULE_DESCRIPTION("BCM2835 codec V4L2 driver");
+MODULE_AUTHOR("Dave Stevenson, <dave.stevenson@raspberrypi.org>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.0.1");
+MODULE_ALIAS("platform:bcm2835-codec");
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