drivers/media/platform/omap3isp/ispvideo.h

   1 /*
   2  * ispvideo.h
   3  *
   4  * TI OMAP3 ISP - Generic video node
   5  *
   6  * Copyright (C) 2009-2010 Nokia Corporation
   7  *
   8  * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
   9  *           Sakari Ailus <sakari.ailus@iki.fi>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #ifndef OMAP3_ISP_VIDEO_H
  17 #define OMAP3_ISP_VIDEO_H
  18
  19 #include <linux/v4l2-mediabus.h>
  20 #include <media/media-entity.h>
  21 #include <media/v4l2-dev.h>
  22 #include <media/v4l2-fh.h>
  23 #include <media/videobuf2-v4l2.h>
  24
  25 #define ISP_VIDEO_DRIVER_NAME           "ispvideo"
  26 #define ISP_VIDEO_DRIVER_VERSION        "0.0.2"
  27
  28 struct isp_device;
  29 struct isp_video;
  30 struct v4l2_mbus_framefmt;
  31 struct v4l2_pix_format;
  32
  33 /*
  34  * struct isp_format_info - ISP media bus format information
  35  * @code: V4L2 media bus format code
  36  * @truncated: V4L2 media bus format code for the same format truncated to 10
  37  *      bits. Identical to @code if the format is 10 bits wide or less.
  38  * @uncompressed: V4L2 media bus format code for the corresponding uncompressed
  39  *      format. Identical to @code if the format is not DPCM compressed.
  40  * @flavor: V4L2 media bus format code for the same pixel layout but
  41  *      shifted to be 8 bits per pixel. =0 if format is not shiftable.
  42  * @pixelformat: V4L2 pixel format FCC identifier
  43  * @width: Bits per pixel (when transferred over a bus)
  44  * @bpp: Bytes per pixel (when stored in memory)
  45  */
  46 struct isp_format_info {
  47         u32 code;
  48         u32 truncated;
  49         u32 uncompressed;
  50         u32 flavor;
  51         u32 pixelformat;
  52         unsigned int width;
  53         unsigned int bpp;
  54 };
  55
  56 enum isp_pipeline_stream_state {
  57         ISP_PIPELINE_STREAM_STOPPED = 0,
  58         ISP_PIPELINE_STREAM_CONTINUOUS = 1,
  59         ISP_PIPELINE_STREAM_SINGLESHOT = 2,
  60 };
  61
  62 enum isp_pipeline_state {
  63         /* The stream has been started on the input video node. */
  64         ISP_PIPELINE_STREAM_INPUT = 1,
  65         /* The stream has been started on the output video node. */
  66         ISP_PIPELINE_STREAM_OUTPUT = 2,
  67         /* At least one buffer is queued on the input video node. */
  68         ISP_PIPELINE_QUEUE_INPUT = 4,
  69         /* At least one buffer is queued on the output video node. */
  70         ISP_PIPELINE_QUEUE_OUTPUT = 8,
  71         /* The input entity is idle, ready to be started. */
  72         ISP_PIPELINE_IDLE_INPUT = 16,
  73         /* The output entity is idle, ready to be started. */
  74         ISP_PIPELINE_IDLE_OUTPUT = 32,
  75         /* The pipeline is currently streaming. */
  76         ISP_PIPELINE_STREAM = 64,
  77 };
  78
  79 /*
  80  * struct isp_pipeline - An ISP hardware pipeline
  81  * @field: The field being processed by the pipeline
  82  * @error: A hardware error occurred during capture
  83  * @ent_enum: Entities in the pipeline
  84  */
  85 struct isp_pipeline {
  86         struct media_pipeline pipe;
  87         spinlock_t lock;                /* Pipeline state and queue flags */
  88         unsigned int state;
  89         enum isp_pipeline_stream_state stream_state;
  90         struct isp_video *input;
  91         struct isp_video *output;
  92         struct media_entity_enum ent_enum;
  93         unsigned long l3_ick;
  94         unsigned int max_rate;
  95         enum v4l2_field field;
  96         atomic_t frame_number;
  97         bool do_propagation; /* of frame number */
  98         bool error;
  99         struct v4l2_fract max_timeperframe;
 100         struct v4l2_subdev *external;
 101         unsigned int external_rate;
 102         unsigned int external_width;
 103 };
 104
 105 #define to_isp_pipeline(__e) \
 106         container_of((__e)->pipe, struct isp_pipeline, pipe)
 107
 108 static inline int isp_pipeline_ready(struct isp_pipeline *pipe)
 109 {
 110         return pipe->state == (ISP_PIPELINE_STREAM_INPUT |
 111                                ISP_PIPELINE_STREAM_OUTPUT |
 112                                ISP_PIPELINE_QUEUE_INPUT |
 113                                ISP_PIPELINE_QUEUE_OUTPUT |
 114                                ISP_PIPELINE_IDLE_INPUT |
 115                                ISP_PIPELINE_IDLE_OUTPUT);
 116 }
 117
 118 /**
 119  * struct isp_buffer - ISP video buffer
 120  * @vb: videobuf2 buffer
 121  * @irqlist: List head for insertion into IRQ queue
 122  * @dma: DMA address
 123  */
 124 struct isp_buffer {
 125         struct vb2_v4l2_buffer vb;
 126         struct list_head irqlist;
 127         dma_addr_t dma;
 128 };
 129
 130 #define to_isp_buffer(buf)      container_of(buf, struct isp_buffer, vb)
 131
 132 enum isp_video_dmaqueue_flags {
 133         /* Set if DMA queue becomes empty when ISP_PIPELINE_STREAM_CONTINUOUS */
 134         ISP_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
 135         /* Set when queuing buffer to an empty DMA queue */
 136         ISP_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
 137 };
 138
 139 #define isp_video_dmaqueue_flags_clr(video)     \
 140                         ({ (video)->dmaqueue_flags = 0; })
 141
 142 /*
 143  * struct isp_video_operations - ISP video operations
 144  * @queue:      Resume streaming when a buffer is queued. Called on VIDIOC_QBUF
 145  *              if there was no buffer previously queued.
 146  */
 147 struct isp_video_operations {
 148         int(*queue)(struct isp_video *video, struct isp_buffer *buffer);
 149 };
 150
 151 struct isp_video {
 152         struct video_device video;
 153         enum v4l2_buf_type type;
 154         struct media_pad pad;
 155
 156         struct mutex mutex;             /* format and crop settings */
 157         atomic_t active;
 158
 159         struct isp_device *isp;
 160
 161         unsigned int capture_mem;
 162         unsigned int bpl_alignment;     /* alignment value */
 163         unsigned int bpl_zero_padding;  /* whether the alignment is optional */
 164         unsigned int bpl_max;           /* maximum bytes per line value */
 165         unsigned int bpl_value;         /* bytes per line value */
 166         unsigned int bpl_padding;       /* padding at end of line */
 167
 168         /* Pipeline state */
 169         struct isp_pipeline pipe;
 170         struct mutex stream_lock;       /* pipeline and stream states */
 171         bool error;
 172
 173         /* Video buffers queue */
 174         struct vb2_queue *queue;
 175         struct mutex queue_lock;        /* protects the queue */
 176         spinlock_t irqlock;             /* protects dmaqueue */
 177         struct list_head dmaqueue;
 178         enum isp_video_dmaqueue_flags dmaqueue_flags;
 179
 180         const struct isp_video_operations *ops;
 181 };
 182
 183 #define to_isp_video(vdev)      container_of(vdev, struct isp_video, video)
 184
 185 struct isp_video_fh {
 186         struct v4l2_fh vfh;
 187         struct isp_video *video;
 188         struct vb2_queue queue;
 189         struct v4l2_format format;
 190         struct v4l2_fract timeperframe;
 191 };
 192
 193 #define to_isp_video_fh(fh)     container_of(fh, struct isp_video_fh, vfh)
 194 #define isp_video_queue_to_isp_video_fh(q) \
 195                                 container_of(q, struct isp_video_fh, queue)
 196
 197 int omap3isp_video_init(struct isp_video *video, const char *name);
 198 void omap3isp_video_cleanup(struct isp_video *video);
 199 int omap3isp_video_register(struct isp_video *video,
 200                             struct v4l2_device *vdev);
 201 void omap3isp_video_unregister(struct isp_video *video);
 202 struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video);
 203 void omap3isp_video_cancel_stream(struct isp_video *video);
 204 void omap3isp_video_resume(struct isp_video *video, int continuous);
 205 struct media_pad *omap3isp_video_remote_pad(struct isp_video *video);
 206
 207 const struct isp_format_info *
 208 omap3isp_video_format_info(u32 code);
 209
 210 #endif /* OMAP3_ISP_VIDEO_H */