/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* TI OMAP4 ISS V4L2 Driver - Generic video node
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*
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* Copyright (C) 2012 Texas Instruments, Inc.
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*
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* Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
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*/
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#ifndef OMAP4_ISS_VIDEO_H
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#define OMAP4_ISS_VIDEO_H
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#include <linux/v4l2-mediabus.h>
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#include <media/media-entity.h>
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#include <media/v4l2-dev.h>
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#include <media/v4l2-fh.h>
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#include <media/videobuf2-v4l2.h>
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#include <media/videobuf2-dma-contig.h>
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#define ISS_VIDEO_DRIVER_NAME "issvideo"
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#define ISS_VIDEO_DRIVER_VERSION "0.0.2"
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struct iss_device;
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struct iss_video;
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struct v4l2_mbus_framefmt;
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struct v4l2_pix_format;
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/*
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* struct iss_format_info - ISS media bus format information
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* @code: V4L2 media bus format code
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* @truncated: V4L2 media bus format code for the same format truncated to 10
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* bits. Identical to @code if the format is 10 bits wide or less.
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* @uncompressed: V4L2 media bus format code for the corresponding uncompressed
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* format. Identical to @code if the format is not DPCM compressed.
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* @flavor: V4L2 media bus format code for the same pixel layout but
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* shifted to be 8 bits per pixel. =0 if format is not shiftable.
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* @pixelformat: V4L2 pixel format FCC identifier
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* @bpp: Bits per pixel
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*/
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struct iss_format_info {
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u32 code;
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u32 truncated;
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u32 uncompressed;
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u32 flavor;
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u32 pixelformat;
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unsigned int bpp;
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};
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enum iss_pipeline_stream_state {
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ISS_PIPELINE_STREAM_STOPPED = 0,
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ISS_PIPELINE_STREAM_CONTINUOUS = 1,
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ISS_PIPELINE_STREAM_SINGLESHOT = 2,
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};
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enum iss_pipeline_state {
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/* The stream has been started on the input video node. */
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ISS_PIPELINE_STREAM_INPUT = 1,
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/* The stream has been started on the output video node. */
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ISS_PIPELINE_STREAM_OUTPUT = (1 << 1),
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/* At least one buffer is queued on the input video node. */
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ISS_PIPELINE_QUEUE_INPUT = (1 << 2),
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/* At least one buffer is queued on the output video node. */
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ISS_PIPELINE_QUEUE_OUTPUT = (1 << 3),
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/* The input entity is idle, ready to be started. */
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ISS_PIPELINE_IDLE_INPUT = (1 << 4),
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/* The output entity is idle, ready to be started. */
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ISS_PIPELINE_IDLE_OUTPUT = (1 << 5),
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/* The pipeline is currently streaming. */
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ISS_PIPELINE_STREAM = (1 << 6),
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};
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/*
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* struct iss_pipeline - An OMAP4 ISS hardware pipeline
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* @ent_enum: Entities in the pipeline
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* @error: A hardware error occurred during capture
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*/
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struct iss_pipeline {
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struct media_pipeline pipe;
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spinlock_t lock; /* Pipeline state and queue flags */
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unsigned int state;
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enum iss_pipeline_stream_state stream_state;
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struct iss_video *input;
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struct iss_video *output;
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struct media_entity_enum ent_enum;
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atomic_t frame_number;
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bool do_propagation; /* of frame number */
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bool error;
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struct v4l2_fract max_timeperframe;
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struct v4l2_subdev *external;
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unsigned int external_rate;
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int external_bpp;
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};
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#define to_iss_pipeline(__e) \
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container_of((__e)->pipe, struct iss_pipeline, pipe)
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static inline int iss_pipeline_ready(struct iss_pipeline *pipe)
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{
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return pipe->state == (ISS_PIPELINE_STREAM_INPUT |
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ISS_PIPELINE_STREAM_OUTPUT |
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ISS_PIPELINE_QUEUE_INPUT |
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ISS_PIPELINE_QUEUE_OUTPUT |
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ISS_PIPELINE_IDLE_INPUT |
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ISS_PIPELINE_IDLE_OUTPUT);
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}
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/*
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* struct iss_buffer - ISS buffer
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* @buffer: ISS video buffer
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* @iss_addr: Physical address of the buffer.
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*/
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struct iss_buffer {
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/* common v4l buffer stuff -- must be first */
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struct vb2_v4l2_buffer vb;
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struct list_head list;
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dma_addr_t iss_addr;
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};
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#define to_iss_buffer(buf) container_of(buf, struct iss_buffer, vb)
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enum iss_video_dmaqueue_flags {
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/* Set if DMA queue becomes empty when ISS_PIPELINE_STREAM_CONTINUOUS */
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ISS_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
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/* Set when queuing buffer to an empty DMA queue */
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ISS_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
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};
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#define iss_video_dmaqueue_flags_clr(video) \
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({ (video)->dmaqueue_flags = 0; })
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/*
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* struct iss_video_operations - ISS video operations
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* @queue: Resume streaming when a buffer is queued. Called on VIDIOC_QBUF
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* if there was no buffer previously queued.
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*/
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struct iss_video_operations {
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int (*queue)(struct iss_video *video, struct iss_buffer *buffer);
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};
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struct iss_video {
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struct video_device video;
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enum v4l2_buf_type type;
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struct media_pad pad;
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struct mutex mutex; /* format and crop settings */
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atomic_t active;
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struct iss_device *iss;
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unsigned int capture_mem;
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unsigned int bpl_alignment; /* alignment value */
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unsigned int bpl_zero_padding; /* whether the alignment is optional */
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unsigned int bpl_max; /* maximum bytes per line value */
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unsigned int bpl_value; /* bytes per line value */
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unsigned int bpl_padding; /* padding at end of line */
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/* Pipeline state */
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struct iss_pipeline pipe;
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struct mutex stream_lock; /* pipeline and stream states */
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bool error;
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/* Video buffers queue */
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struct vb2_queue *queue;
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spinlock_t qlock; /* protects dmaqueue and error */
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struct list_head dmaqueue;
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enum iss_video_dmaqueue_flags dmaqueue_flags;
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const struct iss_video_operations *ops;
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};
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#define to_iss_video(vdev) container_of(vdev, struct iss_video, video)
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struct iss_video_fh {
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struct v4l2_fh vfh;
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struct iss_video *video;
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struct vb2_queue queue;
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struct v4l2_format format;
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struct v4l2_fract timeperframe;
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};
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#define to_iss_video_fh(fh) container_of(fh, struct iss_video_fh, vfh)
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#define iss_video_queue_to_iss_video_fh(q) \
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container_of(q, struct iss_video_fh, queue)
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int omap4iss_video_init(struct iss_video *video, const char *name);
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void omap4iss_video_cleanup(struct iss_video *video);
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int omap4iss_video_register(struct iss_video *video,
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struct v4l2_device *vdev);
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void omap4iss_video_unregister(struct iss_video *video);
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struct iss_buffer *omap4iss_video_buffer_next(struct iss_video *video);
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void omap4iss_video_cancel_stream(struct iss_video *video);
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struct media_pad *omap4iss_video_remote_pad(struct iss_video *video);
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const struct iss_format_info *
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omap4iss_video_format_info(u32 code);
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#endif /* OMAP4_ISS_VIDEO_H */
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