root/drivers/staging/media/omap4iss/iss_video.h

INCLUDED FROM

DEFINITIONS

1. iss_pipeline_ready

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * TI OMAP4 ISS V4L2 Driver - Generic video node
   4  *
   5  * Copyright (C) 2012 Texas Instruments, Inc.
   6  *
   7  * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
   8  */
   9 
  10 #ifndef OMAP4_ISS_VIDEO_H
  11 #define OMAP4_ISS_VIDEO_H
  12 
  13 #include <linux/v4l2-mediabus.h>
  14 #include <media/media-entity.h>
  15 #include <media/v4l2-dev.h>
  16 #include <media/v4l2-fh.h>
  17 #include <media/videobuf2-v4l2.h>
  18 #include <media/videobuf2-dma-contig.h>
  19 
  20 #define ISS_VIDEO_DRIVER_NAME           "issvideo"
  21 #define ISS_VIDEO_DRIVER_VERSION        "0.0.2"
  22 
  23 struct iss_device;
  24 struct iss_video;
  25 struct v4l2_mbus_framefmt;
  26 struct v4l2_pix_format;
  27 
  28 /*
  29  * struct iss_format_info - ISS media bus format information
  30  * @code: V4L2 media bus format code
  31  * @truncated: V4L2 media bus format code for the same format truncated to 10
  32  *      bits. Identical to @code if the format is 10 bits wide or less.
  33  * @uncompressed: V4L2 media bus format code for the corresponding uncompressed
  34  *      format. Identical to @code if the format is not DPCM compressed.
  35  * @flavor: V4L2 media bus format code for the same pixel layout but
  36  *      shifted to be 8 bits per pixel. =0 if format is not shiftable.
  37  * @pixelformat: V4L2 pixel format FCC identifier
  38  * @bpp: Bits per pixel
  39  */
  40 struct iss_format_info {
  41         u32 code;
  42         u32 truncated;
  43         u32 uncompressed;
  44         u32 flavor;
  45         u32 pixelformat;
  46         unsigned int bpp;
  47 };
  48 
  49 enum iss_pipeline_stream_state {
  50         ISS_PIPELINE_STREAM_STOPPED = 0,
  51         ISS_PIPELINE_STREAM_CONTINUOUS = 1,
  52         ISS_PIPELINE_STREAM_SINGLESHOT = 2,
  53 };
  54 
  55 enum iss_pipeline_state {
  56         /* The stream has been started on the input video node. */
  57         ISS_PIPELINE_STREAM_INPUT = 1,
  58         /* The stream has been started on the output video node. */
  59         ISS_PIPELINE_STREAM_OUTPUT = (1 << 1),
  60         /* At least one buffer is queued on the input video node. */
  61         ISS_PIPELINE_QUEUE_INPUT = (1 << 2),
  62         /* At least one buffer is queued on the output video node. */
  63         ISS_PIPELINE_QUEUE_OUTPUT = (1 << 3),
  64         /* The input entity is idle, ready to be started. */
  65         ISS_PIPELINE_IDLE_INPUT = (1 << 4),
  66         /* The output entity is idle, ready to be started. */
  67         ISS_PIPELINE_IDLE_OUTPUT = (1 << 5),
  68         /* The pipeline is currently streaming. */
  69         ISS_PIPELINE_STREAM = (1 << 6),
  70 };
  71 
  72 /*
  73  * struct iss_pipeline - An OMAP4 ISS hardware pipeline
  74  * @ent_enum: Entities in the pipeline
  75  * @error: A hardware error occurred during capture
  76  */
  77 struct iss_pipeline {
  78         struct media_pipeline pipe;
  79         spinlock_t lock;                /* Pipeline state and queue flags */
  80         unsigned int state;
  81         enum iss_pipeline_stream_state stream_state;
  82         struct iss_video *input;
  83         struct iss_video *output;
  84         struct media_entity_enum ent_enum;
  85         atomic_t frame_number;
  86         bool do_propagation; /* of frame number */
  87         bool error;
  88         struct v4l2_fract max_timeperframe;
  89         struct v4l2_subdev *external;
  90         unsigned int external_rate;
  91         int external_bpp;
  92 };
  93 
  94 #define to_iss_pipeline(__e) \
  95         container_of((__e)->pipe, struct iss_pipeline, pipe)
  96 
  97 static inline int iss_pipeline_ready(struct iss_pipeline *pipe)
  98 {
  99         return pipe->state == (ISS_PIPELINE_STREAM_INPUT |
 100                                ISS_PIPELINE_STREAM_OUTPUT |
 101                                ISS_PIPELINE_QUEUE_INPUT |
 102                                ISS_PIPELINE_QUEUE_OUTPUT |
 103                                ISS_PIPELINE_IDLE_INPUT |
 104                                ISS_PIPELINE_IDLE_OUTPUT);
 105 }
 106 
 107 /*
 108  * struct iss_buffer - ISS buffer
 109  * @buffer: ISS video buffer
 110  * @iss_addr: Physical address of the buffer.
 111  */
 112 struct iss_buffer {
 113         /* common v4l buffer stuff -- must be first */
 114         struct vb2_v4l2_buffer  vb;
 115         struct list_head        list;
 116         dma_addr_t iss_addr;
 117 };
 118 
 119 #define to_iss_buffer(buf)      container_of(buf, struct iss_buffer, vb)
 120 
 121 enum iss_video_dmaqueue_flags {
 122         /* Set if DMA queue becomes empty when ISS_PIPELINE_STREAM_CONTINUOUS */
 123         ISS_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
 124         /* Set when queuing buffer to an empty DMA queue */
 125         ISS_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
 126 };
 127 
 128 #define iss_video_dmaqueue_flags_clr(video)     \
 129                         ({ (video)->dmaqueue_flags = 0; })
 130 
 131 /*
 132  * struct iss_video_operations - ISS video operations
 133  * @queue:      Resume streaming when a buffer is queued. Called on VIDIOC_QBUF
 134  *              if there was no buffer previously queued.
 135  */
 136 struct iss_video_operations {
 137         int (*queue)(struct iss_video *video, struct iss_buffer *buffer);
 138 };
 139 
 140 struct iss_video {
 141         struct video_device video;
 142         enum v4l2_buf_type type;
 143         struct media_pad pad;
 144 
 145         struct mutex mutex;             /* format and crop settings */
 146         atomic_t active;
 147 
 148         struct iss_device *iss;
 149 
 150         unsigned int capture_mem;
 151         unsigned int bpl_alignment;     /* alignment value */
 152         unsigned int bpl_zero_padding;  /* whether the alignment is optional */
 153         unsigned int bpl_max;           /* maximum bytes per line value */
 154         unsigned int bpl_value;         /* bytes per line value */
 155         unsigned int bpl_padding;       /* padding at end of line */
 156 
 157         /* Pipeline state */
 158         struct iss_pipeline pipe;
 159         struct mutex stream_lock;       /* pipeline and stream states */
 160         bool error;
 161 
 162         /* Video buffers queue */
 163         struct vb2_queue *queue;
 164         spinlock_t qlock;               /* protects dmaqueue and error */
 165         struct list_head dmaqueue;
 166         enum iss_video_dmaqueue_flags dmaqueue_flags;
 167 
 168         const struct iss_video_operations *ops;
 169 };
 170 
 171 #define to_iss_video(vdev)      container_of(vdev, struct iss_video, video)
 172 
 173 struct iss_video_fh {
 174         struct v4l2_fh vfh;
 175         struct iss_video *video;
 176         struct vb2_queue queue;
 177         struct v4l2_format format;
 178         struct v4l2_fract timeperframe;
 179 };
 180 
 181 #define to_iss_video_fh(fh)     container_of(fh, struct iss_video_fh, vfh)
 182 #define iss_video_queue_to_iss_video_fh(q) \
 183                                 container_of(q, struct iss_video_fh, queue)
 184 
 185 int omap4iss_video_init(struct iss_video *video, const char *name);
 186 void omap4iss_video_cleanup(struct iss_video *video);
 187 int omap4iss_video_register(struct iss_video *video,
 188                             struct v4l2_device *vdev);
 189 void omap4iss_video_unregister(struct iss_video *video);
 190 struct iss_buffer *omap4iss_video_buffer_next(struct iss_video *video);
 191 void omap4iss_video_cancel_stream(struct iss_video *video);
 192 struct media_pad *omap4iss_video_remote_pad(struct iss_video *video);
 193 
 194 const struct iss_format_info *
 195 omap4iss_video_format_info(u32 code);
 196 
 197 #endif /* OMAP4_ISS_VIDEO_H */