drivers/media/platform/omap3isp/ispvideo.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * ispvideo.h
   4  *
   5  * TI OMAP3 ISP - Generic video node
   6  *
   7  * Copyright (C) 2009-2010 Nokia Corporation
   8  *
   9  * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
  10  *           Sakari Ailus <sakari.ailus@iki.fi>
  11  */
  12
  13 #ifndef OMAP3_ISP_VIDEO_H
  14 #define OMAP3_ISP_VIDEO_H
  15
  16 #include <linux/v4l2-mediabus.h>
  17 #include <media/media-entity.h>
  18 #include <media/v4l2-dev.h>
  19 #include <media/v4l2-fh.h>
  20 #include <media/videobuf2-v4l2.h>
  21
  22 #define ISP_VIDEO_DRIVER_NAME           "ispvideo"
  23 #define ISP_VIDEO_DRIVER_VERSION        "0.0.2"
  24
  25 struct isp_device;
  26 struct isp_video;
  27 struct v4l2_mbus_framefmt;
  28 struct v4l2_pix_format;
  29
  30 /*
  31  * struct isp_format_info - ISP media bus format information
  32  * @code: V4L2 media bus format code
  33  * @truncated: V4L2 media bus format code for the same format truncated to 10
  34  *      bits. Identical to @code if the format is 10 bits wide or less.
  35  * @uncompressed: V4L2 media bus format code for the corresponding uncompressed
  36  *      format. Identical to @code if the format is not DPCM compressed.
  37  * @flavor: V4L2 media bus format code for the same pixel layout but
  38  *      shifted to be 8 bits per pixel. =0 if format is not shiftable.
  39  * @pixelformat: V4L2 pixel format FCC identifier
  40  * @width: Bits per pixel (when transferred over a bus)
  41  * @bpp: Bytes per pixel (when stored in memory)
  42  */
  43 struct isp_format_info {
  44         u32 code;
  45         u32 truncated;
  46         u32 uncompressed;
  47         u32 flavor;
  48         u32 pixelformat;
  49         unsigned int width;
  50         unsigned int bpp;
  51 };
  52
  53 enum isp_pipeline_stream_state {
  54         ISP_PIPELINE_STREAM_STOPPED = 0,
  55         ISP_PIPELINE_STREAM_CONTINUOUS = 1,
  56         ISP_PIPELINE_STREAM_SINGLESHOT = 2,
  57 };
  58
  59 enum isp_pipeline_state {
  60         /* The stream has been started on the input video node. */
  61         ISP_PIPELINE_STREAM_INPUT = 1,
  62         /* The stream has been started on the output video node. */
  63         ISP_PIPELINE_STREAM_OUTPUT = 2,
  64         /* At least one buffer is queued on the input video node. */
  65         ISP_PIPELINE_QUEUE_INPUT = 4,
  66         /* At least one buffer is queued on the output video node. */
  67         ISP_PIPELINE_QUEUE_OUTPUT = 8,
  68         /* The input entity is idle, ready to be started. */
  69         ISP_PIPELINE_IDLE_INPUT = 16,
  70         /* The output entity is idle, ready to be started. */
  71         ISP_PIPELINE_IDLE_OUTPUT = 32,
  72         /* The pipeline is currently streaming. */
  73         ISP_PIPELINE_STREAM = 64,
  74 };
  75
  76 /*
  77  * struct isp_pipeline - An ISP hardware pipeline
  78  * @field: The field being processed by the pipeline
  79  * @error: A hardware error occurred during capture
  80  * @ent_enum: Entities in the pipeline
  81  */
  82 struct isp_pipeline {
  83         struct media_pipeline pipe;
  84         spinlock_t lock;                /* Pipeline state and queue flags */
  85         unsigned int state;
  86         enum isp_pipeline_stream_state stream_state;
  87         struct isp_video *input;
  88         struct isp_video *output;
  89         struct media_entity_enum ent_enum;
  90         unsigned long l3_ick;
  91         unsigned int max_rate;
  92         enum v4l2_field field;
  93         atomic_t frame_number;
  94         bool do_propagation; /* of frame number */
  95         bool error;
  96         struct v4l2_fract max_timeperframe;
  97         struct v4l2_subdev *external;
  98         unsigned int external_rate;
  99         unsigned int external_width;
 100 };
 101
 102 #define to_isp_pipeline(__e) \
 103         container_of((__e)->pipe, struct isp_pipeline, pipe)
 104
 105 static inline int isp_pipeline_ready(struct isp_pipeline *pipe)
 106 {
 107         return pipe->state == (ISP_PIPELINE_STREAM_INPUT |
 108                                ISP_PIPELINE_STREAM_OUTPUT |
 109                                ISP_PIPELINE_QUEUE_INPUT |
 110                                ISP_PIPELINE_QUEUE_OUTPUT |
 111                                ISP_PIPELINE_IDLE_INPUT |
 112                                ISP_PIPELINE_IDLE_OUTPUT);
 113 }
 114
 115 /**
 116  * struct isp_buffer - ISP video buffer
 117  * @vb: videobuf2 buffer
 118  * @irqlist: List head for insertion into IRQ queue
 119  * @dma: DMA address
 120  */
 121 struct isp_buffer {
 122         struct vb2_v4l2_buffer vb;
 123         struct list_head irqlist;
 124         dma_addr_t dma;
 125 };
 126
 127 #define to_isp_buffer(buf)      container_of(buf, struct isp_buffer, vb)
 128
 129 enum isp_video_dmaqueue_flags {
 130         /* Set if DMA queue becomes empty when ISP_PIPELINE_STREAM_CONTINUOUS */
 131         ISP_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
 132         /* Set when queuing buffer to an empty DMA queue */
 133         ISP_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
 134 };
 135
 136 #define isp_video_dmaqueue_flags_clr(video)     \
 137                         ({ (video)->dmaqueue_flags = 0; })
 138
 139 /*
 140  * struct isp_video_operations - ISP video operations
 141  * @queue:      Resume streaming when a buffer is queued. Called on VIDIOC_QBUF
 142  *              if there was no buffer previously queued.
 143  */
 144 struct isp_video_operations {
 145         int(*queue)(struct isp_video *video, struct isp_buffer *buffer);
 146 };
 147
 148 struct isp_video {
 149         struct video_device video;
 150         enum v4l2_buf_type type;
 151         struct media_pad pad;
 152
 153         struct mutex mutex;             /* format and crop settings */
 154         atomic_t active;
 155
 156         struct isp_device *isp;
 157
 158         unsigned int capture_mem;
 159         unsigned int bpl_alignment;     /* alignment value */
 160         unsigned int bpl_zero_padding;  /* whether the alignment is optional */
 161         unsigned int bpl_max;           /* maximum bytes per line value */
 162         unsigned int bpl_value;         /* bytes per line value */
 163         unsigned int bpl_padding;       /* padding at end of line */
 164
 165         /* Pipeline state */
 166         struct isp_pipeline pipe;
 167         struct mutex stream_lock;       /* pipeline and stream states */
 168         bool error;
 169
 170         /* Video buffers queue */
 171         struct vb2_queue *queue;
 172         struct mutex queue_lock;        /* protects the queue */
 173         spinlock_t irqlock;             /* protects dmaqueue */
 174         struct list_head dmaqueue;
 175         enum isp_video_dmaqueue_flags dmaqueue_flags;
 176
 177         const struct isp_video_operations *ops;
 178 };
 179
 180 #define to_isp_video(vdev)      container_of(vdev, struct isp_video, video)
 181
 182 struct isp_video_fh {
 183         struct v4l2_fh vfh;
 184         struct isp_video *video;
 185         struct vb2_queue queue;
 186         struct v4l2_format format;
 187         struct v4l2_fract timeperframe;
 188 };
 189
 190 #define to_isp_video_fh(fh)     container_of(fh, struct isp_video_fh, vfh)
 191 #define isp_video_queue_to_isp_video_fh(q) \
 192                                 container_of(q, struct isp_video_fh, queue)
 193
 194 int omap3isp_video_init(struct isp_video *video, const char *name);
 195 void omap3isp_video_cleanup(struct isp_video *video);
 196 int omap3isp_video_register(struct isp_video *video,
 197                             struct v4l2_device *vdev);
 198 void omap3isp_video_unregister(struct isp_video *video);
 199 struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video);
 200 void omap3isp_video_cancel_stream(struct isp_video *video);
 201 void omap3isp_video_resume(struct isp_video *video, int continuous);
 202 struct media_pad *omap3isp_video_remote_pad(struct isp_video *video);
 203
 204 const struct isp_format_info *
 205 omap3isp_video_format_info(u32 code);
 206
 207 #endif /* OMAP3_ISP_VIDEO_H */