drivers/media/platform/exynos-gsc/gsc-core.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (c) 2011 - 2012 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com
   5  *
   6  * header file for Samsung EXYNOS5 SoC series G-Scaler driver
   7
   8  */
   9
  10 #ifndef GSC_CORE_H_
  11 #define GSC_CORE_H_
  12
  13 #include <linux/delay.h>
  14 #include <linux/sched.h>
  15 #include <linux/spinlock.h>
  16 #include <linux/types.h>
  17 #include <linux/videodev2.h>
  18 #include <linux/io.h>
  19 #include <linux/pm_runtime.h>
  20 #include <media/videobuf2-v4l2.h>
  21 #include <media/v4l2-ctrls.h>
  22 #include <media/v4l2-device.h>
  23 #include <media/v4l2-mem2mem.h>
  24 #include <media/v4l2-mediabus.h>
  25 #include <media/videobuf2-dma-contig.h>
  26
  27 #include "gsc-regs.h"
  28
  29 #define CONFIG_VB2_GSC_DMA_CONTIG       1
  30 #define GSC_MODULE_NAME                 "exynos-gsc"
  31
  32 #define GSC_SHUTDOWN_TIMEOUT            ((100*HZ)/1000)
  33 #define GSC_MAX_DEVS                    4
  34 #define GSC_MAX_CLOCKS                  4
  35 #define GSC_M2M_BUF_NUM                 0
  36 #define GSC_MAX_CTRL_NUM                10
  37 #define GSC_SC_ALIGN_4                  4
  38 #define GSC_SC_ALIGN_2                  2
  39 #define DEFAULT_CSC_EQ                  1
  40 #define DEFAULT_CSC_RANGE               1
  41
  42 #define GSC_PARAMS                      (1 << 0)
  43 #define GSC_SRC_FMT                     (1 << 1)
  44 #define GSC_DST_FMT                     (1 << 2)
  45 #define GSC_CTX_M2M                     (1 << 3)
  46 #define GSC_CTX_STOP_REQ                (1 << 6)
  47 #define GSC_CTX_ABORT                   (1 << 7)
  48
  49 enum gsc_dev_flags {
  50         /* for m2m node */
  51         ST_M2M_OPEN,
  52         ST_M2M_RUN,
  53         ST_M2M_PEND,
  54         ST_M2M_SUSPENDED,
  55         ST_M2M_SUSPENDING,
  56 };
  57
  58 enum gsc_irq {
  59         GSC_IRQ_DONE,
  60         GSC_IRQ_OVERRUN
  61 };
  62
  63 /**
  64  * enum gsc_datapath - the path of data used for G-Scaler
  65  * @GSC_CAMERA: from camera
  66  * @GSC_DMA: from/to DMA
  67  * @GSC_LOCAL: to local path
  68  * @GSC_WRITEBACK: from FIMD
  69  */
  70 enum gsc_datapath {
  71         GSC_CAMERA = 0x1,
  72         GSC_DMA,
  73         GSC_MIXER,
  74         GSC_FIMD,
  75         GSC_WRITEBACK,
  76 };
  77
  78 enum gsc_color_fmt {
  79         GSC_RGB = 0x1,
  80         GSC_YUV420 = 0x2,
  81         GSC_YUV422 = 0x4,
  82         GSC_YUV444 = 0x8,
  83 };
  84
  85 enum gsc_yuv_fmt {
  86         GSC_LSB_Y = 0x10,
  87         GSC_LSB_C,
  88         GSC_CBCR = 0x20,
  89         GSC_CRCB,
  90 };
  91
  92 #define fh_to_ctx(__fh) container_of(__fh, struct gsc_ctx, fh)
  93 #define is_rgb(x) (!!((x) & 0x1))
  94 #define is_yuv420(x) (!!((x) & 0x2))
  95 #define is_yuv422(x) (!!((x) & 0x4))
  96
  97 #define gsc_m2m_active(dev)     test_bit(ST_M2M_RUN, &(dev)->state)
  98 #define gsc_m2m_pending(dev)    test_bit(ST_M2M_PEND, &(dev)->state)
  99 #define gsc_m2m_opened(dev)     test_bit(ST_M2M_OPEN, &(dev)->state)
 100
 101 #define ctrl_to_ctx(__ctrl) \
 102         container_of((__ctrl)->handler, struct gsc_ctx, ctrl_handler)
 103 /**
 104  * struct gsc_fmt - the driver's internal color format data
 105  * @mbus_code: Media Bus pixel code, -1 if not applicable
 106  * @pixelformat: the fourcc code for this format, 0 if not applicable
 107  * @yorder: Y/C order
 108  * @corder: Chrominance order control
 109  * @num_planes: number of physically non-contiguous data planes
 110  * @nr_comp: number of physically contiguous data planes
 111  * @depth: per plane driver's private 'number of bits per pixel'
 112  * @flags: flags indicating which operation mode format applies to
 113  */
 114 struct gsc_fmt {
 115         u32 mbus_code;
 116         u32     pixelformat;
 117         u32     color;
 118         u32     yorder;
 119         u32     corder;
 120         u16     num_planes;
 121         u16     num_comp;
 122         u8      depth[VIDEO_MAX_PLANES];
 123         u32     flags;
 124 };
 125
 126 /**
 127  * struct gsc_input_buf - the driver's video buffer
 128  * @vb: videobuf2 buffer
 129  * @list : linked list structure for buffer queue
 130  * @idx : index of G-Scaler input buffer
 131  */
 132 struct gsc_input_buf {
 133         struct vb2_v4l2_buffer vb;
 134         struct list_head        list;
 135         int                     idx;
 136 };
 137
 138 /**
 139  * struct gsc_addr - the G-Scaler physical address set
 140  * @y:   luminance plane address
 141  * @cb:  Cb plane address
 142  * @cr:  Cr plane address
 143  */
 144 struct gsc_addr {
 145         dma_addr_t y;
 146         dma_addr_t cb;
 147         dma_addr_t cr;
 148 };
 149
 150 /* struct gsc_ctrls - the G-Scaler control set
 151  * @rotate: rotation degree
 152  * @hflip: horizontal flip
 153  * @vflip: vertical flip
 154  * @global_alpha: the alpha value of current frame
 155  */
 156 struct gsc_ctrls {
 157         struct v4l2_ctrl *rotate;
 158         struct v4l2_ctrl *hflip;
 159         struct v4l2_ctrl *vflip;
 160         struct v4l2_ctrl *global_alpha;
 161 };
 162
 163 /**
 164  * struct gsc_scaler - the configuration data for G-Scaler inetrnal scaler
 165  * @pre_shfactor:       pre sclaer shift factor
 166  * @pre_hratio:         horizontal ratio of the prescaler
 167  * @pre_vratio:         vertical ratio of the prescaler
 168  * @main_hratio:        the main scaler's horizontal ratio
 169  * @main_vratio:        the main scaler's vertical ratio
 170  */
 171 struct gsc_scaler {
 172         u32 pre_shfactor;
 173         u32 pre_hratio;
 174         u32 pre_vratio;
 175         u32 main_hratio;
 176         u32 main_vratio;
 177 };
 178
 179 struct gsc_dev;
 180
 181 struct gsc_ctx;
 182
 183 /**
 184  * struct gsc_frame - source/target frame properties
 185  * @f_width:    SRC : SRCIMG_WIDTH, DST : OUTPUTDMA_WHOLE_IMG_WIDTH
 186  * @f_height:   SRC : SRCIMG_HEIGHT, DST : OUTPUTDMA_WHOLE_IMG_HEIGHT
 187  * @crop:       cropped(source)/scaled(destination) size
 188  * @payload:    image size in bytes (w x h x bpp)
 189  * @addr:       image frame buffer physical addresses
 190  * @fmt:        G-Scaler color format pointer
 191  * @colorspace: value indicating v4l2_colorspace
 192  * @alpha:      frame's alpha value
 193  */
 194 struct gsc_frame {
 195         u32 f_width;
 196         u32 f_height;
 197         struct v4l2_rect crop;
 198         unsigned long payload[VIDEO_MAX_PLANES];
 199         struct gsc_addr addr;
 200         const struct gsc_fmt *fmt;
 201         u32 colorspace;
 202         u8 alpha;
 203 };
 204
 205 /**
 206  * struct gsc_m2m_device - v4l2 memory-to-memory device data
 207  * @vfd: the video device node for v4l2 m2m mode
 208  * @m2m_dev: v4l2 memory-to-memory device data
 209  * @ctx: hardware context data
 210  * @refcnt: the reference counter
 211  */
 212 struct gsc_m2m_device {
 213         struct video_device     *vfd;
 214         struct v4l2_m2m_dev     *m2m_dev;
 215         struct gsc_ctx          *ctx;
 216         int                     refcnt;
 217 };
 218
 219 /**
 220  *  struct gsc_pix_max - image pixel size limits in various IP configurations
 221  *
 222  *  @org_scaler_bypass_w: max pixel width when the scaler is disabled
 223  *  @org_scaler_bypass_h: max pixel height when the scaler is disabled
 224  *  @org_scaler_input_w: max pixel width when the scaler is enabled
 225  *  @org_scaler_input_h: max pixel height when the scaler is enabled
 226  *  @real_rot_dis_w: max pixel src cropped height with the rotator is off
 227  *  @real_rot_dis_h: max pixel src croppped width with the rotator is off
 228  *  @real_rot_en_w: max pixel src cropped width with the rotator is on
 229  *  @real_rot_en_h: max pixel src cropped height with the rotator is on
 230  *  @target_rot_dis_w: max pixel dst scaled width with the rotator is off
 231  *  @target_rot_dis_h: max pixel dst scaled height with the rotator is off
 232  *  @target_rot_en_w: max pixel dst scaled width with the rotator is on
 233  *  @target_rot_en_h: max pixel dst scaled height with the rotator is on
 234  */
 235 struct gsc_pix_max {
 236         u16 org_scaler_bypass_w;
 237         u16 org_scaler_bypass_h;
 238         u16 org_scaler_input_w;
 239         u16 org_scaler_input_h;
 240         u16 real_rot_dis_w;
 241         u16 real_rot_dis_h;
 242         u16 real_rot_en_w;
 243         u16 real_rot_en_h;
 244         u16 target_rot_dis_w;
 245         u16 target_rot_dis_h;
 246         u16 target_rot_en_w;
 247         u16 target_rot_en_h;
 248 };
 249
 250 /**
 251  *  struct gsc_pix_min - image pixel size limits in various IP configurations
 252  *
 253  *  @org_w: minimum source pixel width
 254  *  @org_h: minimum source pixel height
 255  *  @real_w: minimum input crop pixel width
 256  *  @real_h: minimum input crop pixel height
 257  *  @target_rot_dis_w: minimum output scaled pixel height when rotator is off
 258  *  @target_rot_dis_h: minimum output scaled pixel height when rotator is off
 259  *  @target_rot_en_w: minimum output scaled pixel height when rotator is on
 260  *  @target_rot_en_h: minimum output scaled pixel height when rotator is on
 261  */
 262 struct gsc_pix_min {
 263         u16 org_w;
 264         u16 org_h;
 265         u16 real_w;
 266         u16 real_h;
 267         u16 target_rot_dis_w;
 268         u16 target_rot_dis_h;
 269         u16 target_rot_en_w;
 270         u16 target_rot_en_h;
 271 };
 272
 273 struct gsc_pix_align {
 274         u16 org_h;
 275         u16 org_w;
 276         u16 offset_h;
 277         u16 real_w;
 278         u16 real_h;
 279         u16 target_w;
 280         u16 target_h;
 281 };
 282
 283 /**
 284  * struct gsc_variant - G-Scaler variant information
 285  */
 286 struct gsc_variant {
 287         struct gsc_pix_max *pix_max;
 288         struct gsc_pix_min *pix_min;
 289         struct gsc_pix_align *pix_align;
 290         u16             in_buf_cnt;
 291         u16             out_buf_cnt;
 292         u16             sc_up_max;
 293         u16             sc_down_max;
 294         u16             poly_sc_down_max;
 295         u16             pre_sc_down_max;
 296         u16             local_sc_down;
 297 };
 298
 299 /**
 300  * struct gsc_driverdata - per device type driver data for init time.
 301  *
 302  * @variant: the variant information for this driver.
 303  * @num_entities: the number of g-scalers
 304  */
 305 struct gsc_driverdata {
 306         struct gsc_variant *variant[GSC_MAX_DEVS];
 307         const char      *clk_names[GSC_MAX_CLOCKS];
 308         int             num_clocks;
 309         int             num_entities;
 310 };
 311
 312 /**
 313  * struct gsc_dev - abstraction for G-Scaler entity
 314  * @slock:      the spinlock protecting this data structure
 315  * @lock:       the mutex protecting this data structure
 316  * @pdev:       pointer to the G-Scaler platform device
 317  * @variant:    the IP variant information
 318  * @id:         G-Scaler device index (0..GSC_MAX_DEVS)
 319  * @clock:      clocks required for G-Scaler operation
 320  * @regs:       the mapped hardware registers
 321  * @irq_queue:  interrupt handler waitqueue
 322  * @m2m:        memory-to-memory V4L2 device information
 323  * @state:      flags used to synchronize m2m and capture mode operation
 324  * @vdev:       video device for G-Scaler instance
 325  */
 326 struct gsc_dev {
 327         spinlock_t                      slock;
 328         struct mutex                    lock;
 329         struct platform_device          *pdev;
 330         struct gsc_variant              *variant;
 331         u16                             id;
 332         int                             num_clocks;
 333         struct clk                      *clock[GSC_MAX_CLOCKS];
 334         void __iomem                    *regs;
 335         wait_queue_head_t               irq_queue;
 336         struct gsc_m2m_device           m2m;
 337         unsigned long                   state;
 338         struct video_device             vdev;
 339         struct v4l2_device              v4l2_dev;
 340 };
 341
 342 /**
 343  * gsc_ctx - the device context data
 344  * @s_frame:            source frame properties
 345  * @d_frame:            destination frame properties
 346  * @in_path:            input mode (DMA or camera)
 347  * @out_path:           output mode (DMA or FIFO)
 348  * @scaler:             image scaler properties
 349  * @flags:              additional flags for image conversion
 350  * @state:              flags to keep track of user configuration
 351  * @gsc_dev:            the G-Scaler device this context applies to
 352  * @m2m_ctx:            memory-to-memory device context
 353  * @fh:                 v4l2 file handle
 354  * @ctrl_handler:       v4l2 controls handler
 355  * @gsc_ctrls           G-Scaler control set
 356  * @ctrls_rdy:          true if the control handler is initialized
 357  */
 358 struct gsc_ctx {
 359         struct gsc_frame        s_frame;
 360         struct gsc_frame        d_frame;
 361         enum gsc_datapath       in_path;
 362         enum gsc_datapath       out_path;
 363         struct gsc_scaler       scaler;
 364         u32                     flags;
 365         u32                     state;
 366         int                     rotation;
 367         unsigned int            hflip:1;
 368         unsigned int            vflip:1;
 369         struct gsc_dev          *gsc_dev;
 370         struct v4l2_m2m_ctx     *m2m_ctx;
 371         struct v4l2_fh          fh;
 372         struct v4l2_ctrl_handler ctrl_handler;
 373         struct gsc_ctrls        gsc_ctrls;
 374         bool                    ctrls_rdy;
 375         enum v4l2_colorspace out_colorspace;
 376 };
 377
 378 void gsc_set_prefbuf(struct gsc_dev *gsc, struct gsc_frame *frm);
 379 int gsc_register_m2m_device(struct gsc_dev *gsc);
 380 void gsc_unregister_m2m_device(struct gsc_dev *gsc);
 381 void gsc_m2m_job_finish(struct gsc_ctx *ctx, int vb_state);
 382
 383 u32 get_plane_size(struct gsc_frame *fr, unsigned int plane);
 384 const struct gsc_fmt *get_format(int index);
 385 const struct gsc_fmt *find_fmt(u32 *pixelformat, u32 *mbus_code, u32 index);
 386 int gsc_enum_fmt(struct v4l2_fmtdesc *f);
 387 int gsc_try_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f);
 388 void gsc_set_frame_size(struct gsc_frame *frame, int width, int height);
 389 int gsc_g_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f);
 390 void gsc_check_crop_change(u32 tmp_w, u32 tmp_h, u32 *w, u32 *h);
 391 int gsc_try_selection(struct gsc_ctx *ctx, struct v4l2_selection *s);
 392 int gsc_cal_prescaler_ratio(struct gsc_variant *var, u32 src, u32 dst,
 393                                                         u32 *ratio);
 394 void gsc_get_prescaler_shfactor(u32 hratio, u32 vratio, u32 *sh);
 395 void gsc_check_src_scale_info(struct gsc_variant *var,
 396                                 struct gsc_frame *s_frame,
 397                                 u32 *wratio, u32 tx, u32 ty, u32 *hratio);
 398 int gsc_check_scaler_ratio(struct gsc_variant *var, int sw, int sh, int dw,
 399                            int dh, int rot, int out_path);
 400 int gsc_set_scaler_info(struct gsc_ctx *ctx);
 401 int gsc_ctrls_create(struct gsc_ctx *ctx);
 402 void gsc_ctrls_delete(struct gsc_ctx *ctx);
 403 int gsc_prepare_addr(struct gsc_ctx *ctx, struct vb2_buffer *vb,
 404                      struct gsc_frame *frame, struct gsc_addr *addr);
 405
 406 static inline void gsc_ctx_state_lock_set(u32 state, struct gsc_ctx *ctx)
 407 {
 408         unsigned long flags;
 409
 410         spin_lock_irqsave(&ctx->gsc_dev->slock, flags);
 411         ctx->state |= state;
 412         spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
 413 }
 414
 415 static inline void gsc_ctx_state_lock_clear(u32 state, struct gsc_ctx *ctx)
 416 {
 417         unsigned long flags;
 418
 419         spin_lock_irqsave(&ctx->gsc_dev->slock, flags);
 420         ctx->state &= ~state;
 421         spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
 422 }
 423
 424 static inline int is_tiled(const struct gsc_fmt *fmt)
 425 {
 426         return fmt->pixelformat == V4L2_PIX_FMT_NV12MT_16X16;
 427 }
 428
 429 static inline void gsc_hw_enable_control(struct gsc_dev *dev, bool on)
 430 {
 431         u32 cfg = readl(dev->regs + GSC_ENABLE);
 432
 433         if (on)
 434                 cfg |= GSC_ENABLE_ON;
 435         else
 436                 cfg &= ~GSC_ENABLE_ON;
 437
 438         writel(cfg, dev->regs + GSC_ENABLE);
 439 }
 440
 441 static inline int gsc_hw_get_irq_status(struct gsc_dev *dev)
 442 {
 443         u32 cfg = readl(dev->regs + GSC_IRQ);
 444         if (cfg & GSC_IRQ_STATUS_OR_IRQ)
 445                 return GSC_IRQ_OVERRUN;
 446         else
 447                 return GSC_IRQ_DONE;
 448
 449 }
 450
 451 static inline void gsc_hw_clear_irq(struct gsc_dev *dev, int irq)
 452 {
 453         u32 cfg = readl(dev->regs + GSC_IRQ);
 454         if (irq == GSC_IRQ_OVERRUN)
 455                 cfg |= GSC_IRQ_STATUS_OR_IRQ;
 456         else if (irq == GSC_IRQ_DONE)
 457                 cfg |= GSC_IRQ_STATUS_FRM_DONE_IRQ;
 458         writel(cfg, dev->regs + GSC_IRQ);
 459 }
 460
 461 static inline bool gsc_ctx_state_is_set(u32 mask, struct gsc_ctx *ctx)
 462 {
 463         unsigned long flags;
 464         bool ret;
 465
 466         spin_lock_irqsave(&ctx->gsc_dev->slock, flags);
 467         ret = (ctx->state & mask) == mask;
 468         spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
 469         return ret;
 470 }
 471
 472 static inline struct gsc_frame *ctx_get_frame(struct gsc_ctx *ctx,
 473                                               enum v4l2_buf_type type)
 474 {
 475         struct gsc_frame *frame;
 476
 477         if (V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE == type) {
 478                 frame = &ctx->s_frame;
 479         } else if (V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE == type) {
 480                 frame = &ctx->d_frame;
 481         } else {
 482                 pr_err("Wrong buffer/video queue type (%d)", type);
 483                 return ERR_PTR(-EINVAL);
 484         }
 485
 486         return frame;
 487 }
 488
 489 void gsc_hw_set_sw_reset(struct gsc_dev *dev);
 490 int gsc_wait_reset(struct gsc_dev *dev);
 491
 492 void gsc_hw_set_frm_done_irq_mask(struct gsc_dev *dev, bool mask);
 493 void gsc_hw_set_gsc_irq_enable(struct gsc_dev *dev, bool mask);
 494 void gsc_hw_set_input_buf_masking(struct gsc_dev *dev, u32 shift, bool enable);
 495 void gsc_hw_set_output_buf_masking(struct gsc_dev *dev, u32 shift, bool enable);
 496 void gsc_hw_set_input_addr(struct gsc_dev *dev, struct gsc_addr *addr,
 497                                                         int index);
 498 void gsc_hw_set_output_addr(struct gsc_dev *dev, struct gsc_addr *addr,
 499                                                         int index);
 500 void gsc_hw_set_input_path(struct gsc_ctx *ctx);
 501 void gsc_hw_set_in_size(struct gsc_ctx *ctx);
 502 void gsc_hw_set_in_image_rgb(struct gsc_ctx *ctx);
 503 void gsc_hw_set_in_image_format(struct gsc_ctx *ctx);
 504 void gsc_hw_set_output_path(struct gsc_ctx *ctx);
 505 void gsc_hw_set_out_size(struct gsc_ctx *ctx);
 506 void gsc_hw_set_out_image_rgb(struct gsc_ctx *ctx);
 507 void gsc_hw_set_out_image_format(struct gsc_ctx *ctx);
 508 void gsc_hw_set_prescaler(struct gsc_ctx *ctx);
 509 void gsc_hw_set_mainscaler(struct gsc_ctx *ctx);
 510 void gsc_hw_set_rotation(struct gsc_ctx *ctx);
 511 void gsc_hw_set_global_alpha(struct gsc_ctx *ctx);
 512 void gsc_hw_set_sfr_update(struct gsc_ctx *ctx);
 513
 514 #endif /* GSC_CORE_H_ */