drivers/media/platform/sti/bdisp/bdisp.h

   1 /*
   2  * Copyright (C) STMicroelectronics SA 2014
   3  * Authors: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics.
   4  * License terms:  GNU General Public License (GPL), version 2
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/ktime.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/spinlock.h>
  11
  12 #include <media/v4l2-ctrls.h>
  13 #include <media/v4l2-device.h>
  14 #include <media/v4l2-mem2mem.h>
  15
  16 #include <media/videobuf2-dma-contig.h>
  17
  18 #define BDISP_NAME              "bdisp"
  19
  20 /*
  21  *  Max nb of nodes in node-list:
  22  *   - 2 nodes to handle wide 4K pictures
  23  *   - 2 nodes to handle two planes (Y & CbCr) */
  24 #define MAX_OUTPUT_PLANES       2
  25 #define MAX_VERTICAL_STRIDES    2
  26 #define MAX_NB_NODE             (MAX_OUTPUT_PLANES * MAX_VERTICAL_STRIDES)
  27
  28 /* struct bdisp_ctrls - bdisp control set
  29  * @hflip:      horizontal flip
  30  * @vflip:      vertical flip
  31  */
  32 struct bdisp_ctrls {
  33         struct v4l2_ctrl        *hflip;
  34         struct v4l2_ctrl        *vflip;
  35 };
  36
  37 /**
  38  * struct bdisp_fmt - driver's internal color format data
  39  * @pixelformat:fourcc code for this format
  40  * @nb_planes:  number of planes  (ex: [0]=RGB/Y - [1]=Cb/Cr, ...)
  41  * @bpp:        bits per pixel (general)
  42  * @bpp_plane0: byte per pixel for the 1st plane
  43  * @w_align:    width alignment in pixel (multiple of)
  44  * @h_align:    height alignment in pixel (multiple of)
  45  */
  46 struct bdisp_fmt {
  47         u32                     pixelformat;
  48         u8                      nb_planes;
  49         u8                      bpp;
  50         u8                      bpp_plane0;
  51         u8                      w_align;
  52         u8                      h_align;
  53 };
  54
  55 /**
  56  * struct bdisp_frame - frame properties
  57  *
  58  * @width:      frame width (including padding)
  59  * @height:     frame height (including padding)
  60  * @fmt:        pointer to frame format descriptor
  61  * @field:      frame / field type
  62  * @bytesperline: stride of the 1st plane
  63  * @sizeimage:  image size in bytes
  64  * @colorspace: colorspace
  65  * @crop:       crop area
  66  * @paddr:      image physical addresses per plane ([0]=RGB/Y - [1]=Cb/Cr, ...)
  67  */
  68 struct bdisp_frame {
  69         u32                     width;
  70         u32                     height;
  71         const struct bdisp_fmt  *fmt;
  72         enum v4l2_field         field;
  73         u32                     bytesperline;
  74         u32                     sizeimage;
  75         enum v4l2_colorspace    colorspace;
  76         struct v4l2_rect        crop;
  77         dma_addr_t              paddr[4];
  78 };
  79
  80 /**
  81  * struct bdisp_request - bdisp request
  82  *
  83  * @src:        source frame properties
  84  * @dst:        destination frame properties
  85  * @hflip:      horizontal flip
  86  * @vflip:      vertical flip
  87  * @nb_req:     number of run request
  88  */
  89 struct bdisp_request {
  90         struct bdisp_frame      src;
  91         struct bdisp_frame      dst;
  92         unsigned int            hflip:1;
  93         unsigned int            vflip:1;
  94         int                     nb_req;
  95 };
  96
  97 /**
  98  * struct bdisp_ctx - device context data
  99  *
 100  * @src:        source frame properties
 101  * @dst:        destination frame properties
 102  * @state:      flags to keep track of user configuration
 103  * @hflip:      horizontal flip
 104  * @vflip:      vertical flip
 105  * @bdisp_dev:  the device this context applies to
 106  * @node:       node array
 107  * @node_paddr: node physical address array
 108  * @fh:         v4l2 file handle
 109  * @ctrl_handler: v4l2 controls handler
 110  * @bdisp_ctrls: bdisp control set
 111  * @ctrls_rdy:  true if the control handler is initialized
 112  */
 113 struct bdisp_ctx {
 114         struct bdisp_frame      src;
 115         struct bdisp_frame      dst;
 116         u32                     state;
 117         unsigned int            hflip:1;
 118         unsigned int            vflip:1;
 119         struct bdisp_dev        *bdisp_dev;
 120         struct bdisp_node       *node[MAX_NB_NODE];
 121         dma_addr_t              node_paddr[MAX_NB_NODE];
 122         struct v4l2_fh          fh;
 123         struct v4l2_ctrl_handler ctrl_handler;
 124         struct bdisp_ctrls      bdisp_ctrls;
 125         bool                    ctrls_rdy;
 126 };
 127
 128 /**
 129  * struct bdisp_m2m_device - v4l2 memory-to-memory device data
 130  *
 131  * @vdev:       video device node for v4l2 m2m mode
 132  * @m2m_dev:    v4l2 m2m device data
 133  * @ctx:        hardware context data
 134  * @refcnt:     reference counter
 135  */
 136 struct bdisp_m2m_device {
 137         struct video_device     *vdev;
 138         struct v4l2_m2m_dev     *m2m_dev;
 139         struct bdisp_ctx        *ctx;
 140         int                     refcnt;
 141 };
 142
 143 /**
 144  * struct bdisp_dbg - debug info
 145  *
 146  * @debugfs_entry: debugfs
 147  * @copy_node:     array of last used nodes
 148  * @copy_request:  last bdisp request
 149  * @hw_start:      start time of last HW request
 150  * @last_duration: last HW processing duration in microsecs
 151  * @min_duration:  min HW processing duration in microsecs
 152  * @max_duration:  max HW processing duration in microsecs
 153  * @tot_duration:  total HW processing duration in microsecs
 154  */
 155 struct bdisp_dbg {
 156         struct dentry           *debugfs_entry;
 157         struct bdisp_node       *copy_node[MAX_NB_NODE];
 158         struct bdisp_request    copy_request;
 159         ktime_t                 hw_start;
 160         s64                     last_duration;
 161         s64                     min_duration;
 162         s64                     max_duration;
 163         s64                     tot_duration;
 164 };
 165
 166 /**
 167  * struct bdisp_dev - abstraction for bdisp entity
 168  *
 169  * @v4l2_dev:   v4l2 device
 170  * @vdev:       video device
 171  * @pdev:       platform device
 172  * @dev:        device
 173  * @lock:       mutex protecting this data structure
 174  * @slock:      spinlock protecting this data structure
 175  * @id:         device index
 176  * @m2m:        memory-to-memory V4L2 device information
 177  * @state:      flags used to synchronize m2m and capture mode operation
 178  * @alloc_ctx:  videobuf2 memory allocator context
 179  * @clock:      IP clock
 180  * @regs:       registers
 181  * @irq_queue:  interrupt handler waitqueue
 182  * @work_queue: workqueue to handle timeouts
 183  * @timeout_work: IRQ timeout structure
 184  * @dbg:        debug info
 185  */
 186 struct bdisp_dev {
 187         struct v4l2_device      v4l2_dev;
 188         struct video_device     vdev;
 189         struct platform_device  *pdev;
 190         struct device           *dev;
 191         spinlock_t              slock;
 192         struct mutex            lock;
 193         u16                     id;
 194         struct bdisp_m2m_device m2m;
 195         unsigned long           state;
 196         struct vb2_alloc_ctx    *alloc_ctx;
 197         struct clk              *clock;
 198         void __iomem            *regs;
 199         wait_queue_head_t       irq_queue;
 200         struct workqueue_struct *work_queue;
 201         struct delayed_work     timeout_work;
 202         struct bdisp_dbg        dbg;
 203 };
 204
 205 void bdisp_hw_free_nodes(struct bdisp_ctx *ctx);
 206 int bdisp_hw_alloc_nodes(struct bdisp_ctx *ctx);
 207 void bdisp_hw_free_filters(struct device *dev);
 208 int bdisp_hw_alloc_filters(struct device *dev);
 209 int bdisp_hw_reset(struct bdisp_dev *bdisp);
 210 int bdisp_hw_get_and_clear_irq(struct bdisp_dev *bdisp);
 211 int bdisp_hw_update(struct bdisp_ctx *ctx);
 212
 213 void bdisp_debugfs_remove(struct bdisp_dev *bdisp);
 214 int bdisp_debugfs_create(struct bdisp_dev *bdisp);
 215 void bdisp_dbg_perf_begin(struct bdisp_dev *bdisp);
 216 void bdisp_dbg_perf_end(struct bdisp_dev *bdisp);