drivers/media/platform/vsp1/vsp1_rpf.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * vsp1_rpf.c  --  R-Car VSP1 Read Pixel Formatter
   4  *
   5  * Copyright (C) 2013-2014 Renesas Electronics Corporation
   6  *
   7  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   8  */
   9
  10 #include <linux/device.h>
  11
  12 #include <media/v4l2-subdev.h>
  13
  14 #include "vsp1.h"
  15 #include "vsp1_dl.h"
  16 #include "vsp1_pipe.h"
  17 #include "vsp1_rwpf.h"
  18 #include "vsp1_video.h"
  19
  20 #define RPF_MAX_WIDTH                           8190
  21 #define RPF_MAX_HEIGHT                          8190
  22
  23 /* Pre extended display list command data structure. */
  24 struct vsp1_extcmd_auto_fld_body {
  25         u32 top_y0;
  26         u32 bottom_y0;
  27         u32 top_c0;
  28         u32 bottom_c0;
  29         u32 top_c1;
  30         u32 bottom_c1;
  31         u32 reserved0;
  32         u32 reserved1;
  33 } __packed;
  34
  35 /* -----------------------------------------------------------------------------
  36  * Device Access
  37  */
  38
  39 static inline void vsp1_rpf_write(struct vsp1_rwpf *rpf,
  40                                   struct vsp1_dl_body *dlb, u32 reg, u32 data)
  41 {
  42         vsp1_dl_body_write(dlb, reg + rpf->entity.index * VI6_RPF_OFFSET,
  43                                data);
  44 }
  45
  46 /* -----------------------------------------------------------------------------
  47  * V4L2 Subdevice Operations
  48  */
  49
  50 static const struct v4l2_subdev_ops rpf_ops = {
  51         .pad    = &vsp1_rwpf_pad_ops,
  52 };
  53
  54 /* -----------------------------------------------------------------------------
  55  * VSP1 Entity Operations
  56  */
  57
  58 static void rpf_configure_stream(struct vsp1_entity *entity,
  59                                  struct vsp1_pipeline *pipe,
  60                                  struct vsp1_dl_body *dlb)
  61 {
  62         struct vsp1_rwpf *rpf = to_rwpf(&entity->subdev);
  63         const struct vsp1_format_info *fmtinfo = rpf->fmtinfo;
  64         const struct v4l2_pix_format_mplane *format = &rpf->format;
  65         const struct v4l2_mbus_framefmt *source_format;
  66         const struct v4l2_mbus_framefmt *sink_format;
  67         unsigned int left = 0;
  68         unsigned int top = 0;
  69         u32 pstride;
  70         u32 infmt;
  71
  72         /* Stride */
  73         pstride = format->plane_fmt[0].bytesperline
  74                 << VI6_RPF_SRCM_PSTRIDE_Y_SHIFT;
  75         if (format->num_planes > 1)
  76                 pstride |= format->plane_fmt[1].bytesperline
  77                         << VI6_RPF_SRCM_PSTRIDE_C_SHIFT;
  78
  79         /*
  80          * pstride has both STRIDE_Y and STRIDE_C, but multiplying the whole
  81          * of pstride by 2 is conveniently OK here as we are multiplying both
  82          * values.
  83          */
  84         if (pipe->interlaced)
  85                 pstride *= 2;
  86
  87         vsp1_rpf_write(rpf, dlb, VI6_RPF_SRCM_PSTRIDE, pstride);
  88
  89         /* Format */
  90         sink_format = vsp1_entity_get_pad_format(&rpf->entity,
  91                                                  rpf->entity.config,
  92                                                  RWPF_PAD_SINK);
  93         source_format = vsp1_entity_get_pad_format(&rpf->entity,
  94                                                    rpf->entity.config,
  95                                                    RWPF_PAD_SOURCE);
  96
  97         infmt = VI6_RPF_INFMT_CIPM
  98               | (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT);
  99
 100         if (fmtinfo->swap_yc)
 101                 infmt |= VI6_RPF_INFMT_SPYCS;
 102         if (fmtinfo->swap_uv)
 103                 infmt |= VI6_RPF_INFMT_SPUVS;
 104
 105         if (sink_format->code != source_format->code)
 106                 infmt |= VI6_RPF_INFMT_CSC;
 107
 108         vsp1_rpf_write(rpf, dlb, VI6_RPF_INFMT, infmt);
 109         vsp1_rpf_write(rpf, dlb, VI6_RPF_DSWAP, fmtinfo->swap);
 110
 111         /* Output location */
 112         if (pipe->brx) {
 113                 const struct v4l2_rect *compose;
 114
 115                 compose = vsp1_entity_get_pad_selection(pipe->brx,
 116                                                         pipe->brx->config,
 117                                                         rpf->brx_input,
 118                                                         V4L2_SEL_TGT_COMPOSE);
 119                 left = compose->left;
 120                 top = compose->top;
 121         }
 122
 123         if (pipe->interlaced)
 124                 top /= 2;
 125
 126         vsp1_rpf_write(rpf, dlb, VI6_RPF_LOC,
 127                        (left << VI6_RPF_LOC_HCOORD_SHIFT) |
 128                        (top << VI6_RPF_LOC_VCOORD_SHIFT));
 129
 130         /*
 131          * On Gen2 use the alpha channel (extended to 8 bits) when available or
 132          * a fixed alpha value set through the V4L2_CID_ALPHA_COMPONENT control
 133          * otherwise.
 134          *
 135          * The Gen3 RPF has extended alpha capability and can both multiply the
 136          * alpha channel by a fixed global alpha value, and multiply the pixel
 137          * components to convert the input to premultiplied alpha.
 138          *
 139          * As alpha premultiplication is available in the BRx for both Gen2 and
 140          * Gen3 we handle it there and use the Gen3 alpha multiplier for global
 141          * alpha multiplication only. This however prevents conversion to
 142          * premultiplied alpha if no BRx is present in the pipeline. If that use
 143          * case turns out to be useful we will revisit the implementation (for
 144          * Gen3 only).
 145          *
 146          * We enable alpha multiplication on Gen3 using the fixed alpha value
 147          * set through the V4L2_CID_ALPHA_COMPONENT control when the input
 148          * contains an alpha channel. On Gen2 the global alpha is ignored in
 149          * that case.
 150          *
 151          * In all cases, disable color keying.
 152          */
 153         vsp1_rpf_write(rpf, dlb, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_AEXT_EXT |
 154                        (fmtinfo->alpha ? VI6_RPF_ALPH_SEL_ASEL_PACKED
 155                                        : VI6_RPF_ALPH_SEL_ASEL_FIXED));
 156
 157         if (entity->vsp1->info->gen == 3) {
 158                 u32 mult;
 159
 160                 if (fmtinfo->alpha) {
 161                         /*
 162                          * When the input contains an alpha channel enable the
 163                          * alpha multiplier. If the input is premultiplied we
 164                          * need to multiply both the alpha channel and the pixel
 165                          * components by the global alpha value to keep them
 166                          * premultiplied. Otherwise multiply the alpha channel
 167                          * only.
 168                          */
 169                         bool premultiplied = format->flags
 170                                            & V4L2_PIX_FMT_FLAG_PREMUL_ALPHA;
 171
 172                         mult = VI6_RPF_MULT_ALPHA_A_MMD_RATIO
 173                              | (premultiplied ?
 174                                 VI6_RPF_MULT_ALPHA_P_MMD_RATIO :
 175                                 VI6_RPF_MULT_ALPHA_P_MMD_NONE);
 176                 } else {
 177                         /*
 178                          * When the input doesn't contain an alpha channel the
 179                          * global alpha value is applied in the unpacking unit,
 180                          * the alpha multiplier isn't needed and must be
 181                          * disabled.
 182                          */
 183                         mult = VI6_RPF_MULT_ALPHA_A_MMD_NONE
 184                              | VI6_RPF_MULT_ALPHA_P_MMD_NONE;
 185                 }
 186
 187                 rpf->mult_alpha = mult;
 188         }
 189
 190         vsp1_rpf_write(rpf, dlb, VI6_RPF_MSK_CTRL, 0);
 191         vsp1_rpf_write(rpf, dlb, VI6_RPF_CKEY_CTRL, 0);
 192
 193 }
 194
 195 static void vsp1_rpf_configure_autofld(struct vsp1_rwpf *rpf,
 196                                        struct vsp1_dl_list *dl)
 197 {
 198         const struct v4l2_pix_format_mplane *format = &rpf->format;
 199         struct vsp1_dl_ext_cmd *cmd;
 200         struct vsp1_extcmd_auto_fld_body *auto_fld;
 201         u32 offset_y, offset_c;
 202
 203         cmd = vsp1_dl_get_pre_cmd(dl);
 204         if (WARN_ONCE(!cmd, "Failed to obtain an autofld cmd"))
 205                 return;
 206
 207         /* Re-index our auto_fld to match the current RPF. */
 208         auto_fld = cmd->data;
 209         auto_fld = &auto_fld[rpf->entity.index];
 210
 211         auto_fld->top_y0 = rpf->mem.addr[0];
 212         auto_fld->top_c0 = rpf->mem.addr[1];
 213         auto_fld->top_c1 = rpf->mem.addr[2];
 214
 215         offset_y = format->plane_fmt[0].bytesperline;
 216         offset_c = format->plane_fmt[1].bytesperline;
 217
 218         auto_fld->bottom_y0 = rpf->mem.addr[0] + offset_y;
 219         auto_fld->bottom_c0 = rpf->mem.addr[1] + offset_c;
 220         auto_fld->bottom_c1 = rpf->mem.addr[2] + offset_c;
 221
 222         cmd->flags |= VI6_DL_EXT_AUTOFLD_INT | BIT(16 + rpf->entity.index);
 223 }
 224
 225 static void rpf_configure_frame(struct vsp1_entity *entity,
 226                                 struct vsp1_pipeline *pipe,
 227                                 struct vsp1_dl_list *dl,
 228                                 struct vsp1_dl_body *dlb)
 229 {
 230         struct vsp1_rwpf *rpf = to_rwpf(&entity->subdev);
 231
 232         vsp1_rpf_write(rpf, dlb, VI6_RPF_VRTCOL_SET,
 233                        rpf->alpha << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);
 234         vsp1_rpf_write(rpf, dlb, VI6_RPF_MULT_ALPHA, rpf->mult_alpha |
 235                        (rpf->alpha << VI6_RPF_MULT_ALPHA_RATIO_SHIFT));
 236
 237         vsp1_pipeline_propagate_alpha(pipe, dlb, rpf->alpha);
 238 }
 239
 240 static void rpf_configure_partition(struct vsp1_entity *entity,
 241                                     struct vsp1_pipeline *pipe,
 242                                     struct vsp1_dl_list *dl,
 243                                     struct vsp1_dl_body *dlb)
 244 {
 245         struct vsp1_rwpf *rpf = to_rwpf(&entity->subdev);
 246         struct vsp1_rwpf_memory mem = rpf->mem;
 247         struct vsp1_device *vsp1 = rpf->entity.vsp1;
 248         const struct vsp1_format_info *fmtinfo = rpf->fmtinfo;
 249         const struct v4l2_pix_format_mplane *format = &rpf->format;
 250         struct v4l2_rect crop;
 251
 252         /*
 253          * Source size and crop offsets.
 254          *
 255          * The crop offsets correspond to the location of the crop
 256          * rectangle top left corner in the plane buffer. Only two
 257          * offsets are needed, as planes 2 and 3 always have identical
 258          * strides.
 259          */
 260         crop = *vsp1_rwpf_get_crop(rpf, rpf->entity.config);
 261
 262         /*
 263          * Partition Algorithm Control
 264          *
 265          * The partition algorithm can split this frame into multiple
 266          * slices. We must scale our partition window based on the pipe
 267          * configuration to match the destination partition window.
 268          * To achieve this, we adjust our crop to provide a 'sub-crop'
 269          * matching the expected partition window. Only 'left' and
 270          * 'width' need to be adjusted.
 271          */
 272         if (pipe->partitions > 1) {
 273                 crop.width = pipe->partition->rpf.width;
 274                 crop.left += pipe->partition->rpf.left;
 275         }
 276
 277         if (pipe->interlaced) {
 278                 crop.height = round_down(crop.height / 2, fmtinfo->vsub);
 279                 crop.top = round_down(crop.top / 2, fmtinfo->vsub);
 280         }
 281
 282         vsp1_rpf_write(rpf, dlb, VI6_RPF_SRC_BSIZE,
 283                        (crop.width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) |
 284                        (crop.height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT));
 285         vsp1_rpf_write(rpf, dlb, VI6_RPF_SRC_ESIZE,
 286                        (crop.width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) |
 287                        (crop.height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT));
 288
 289         mem.addr[0] += crop.top * format->plane_fmt[0].bytesperline
 290                      + crop.left * fmtinfo->bpp[0] / 8;
 291
 292         if (format->num_planes > 1) {
 293                 unsigned int offset;
 294
 295                 offset = crop.top * format->plane_fmt[1].bytesperline
 296                        + crop.left / fmtinfo->hsub
 297                        * fmtinfo->bpp[1] / 8;
 298                 mem.addr[1] += offset;
 299                 mem.addr[2] += offset;
 300         }
 301
 302         /*
 303          * On Gen3 hardware the SPUVS bit has no effect on 3-planar
 304          * formats. Swap the U and V planes manually in that case.
 305          */
 306         if (vsp1->info->gen == 3 && format->num_planes == 3 &&
 307             fmtinfo->swap_uv)
 308                 swap(mem.addr[1], mem.addr[2]);
 309
 310         /*
 311          * Interlaced pipelines will use the extended pre-cmd to process
 312          * SRCM_ADDR_{Y,C0,C1}
 313          */
 314         if (pipe->interlaced) {
 315                 vsp1_rpf_configure_autofld(rpf, dl);
 316         } else {
 317                 vsp1_rpf_write(rpf, dlb, VI6_RPF_SRCM_ADDR_Y, mem.addr[0]);
 318                 vsp1_rpf_write(rpf, dlb, VI6_RPF_SRCM_ADDR_C0, mem.addr[1]);
 319                 vsp1_rpf_write(rpf, dlb, VI6_RPF_SRCM_ADDR_C1, mem.addr[2]);
 320         }
 321 }
 322
 323 static void rpf_partition(struct vsp1_entity *entity,
 324                           struct vsp1_pipeline *pipe,
 325                           struct vsp1_partition *partition,
 326                           unsigned int partition_idx,
 327                           struct vsp1_partition_window *window)
 328 {
 329         partition->rpf = *window;
 330 }
 331
 332 static const struct vsp1_entity_operations rpf_entity_ops = {
 333         .configure_stream = rpf_configure_stream,
 334         .configure_frame = rpf_configure_frame,
 335         .configure_partition = rpf_configure_partition,
 336         .partition = rpf_partition,
 337 };
 338
 339 /* -----------------------------------------------------------------------------
 340  * Initialization and Cleanup
 341  */
 342
 343 struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index)
 344 {
 345         struct vsp1_rwpf *rpf;
 346         char name[6];
 347         int ret;
 348
 349         rpf = devm_kzalloc(vsp1->dev, sizeof(*rpf), GFP_KERNEL);
 350         if (rpf == NULL)
 351                 return ERR_PTR(-ENOMEM);
 352
 353         rpf->max_width = RPF_MAX_WIDTH;
 354         rpf->max_height = RPF_MAX_HEIGHT;
 355
 356         rpf->entity.ops = &rpf_entity_ops;
 357         rpf->entity.type = VSP1_ENTITY_RPF;
 358         rpf->entity.index = index;
 359
 360         sprintf(name, "rpf.%u", index);
 361         ret = vsp1_entity_init(vsp1, &rpf->entity, name, 2, &rpf_ops,
 362                                MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
 363         if (ret < 0)
 364                 return ERR_PTR(ret);
 365
 366         /* Initialize the control handler. */
 367         ret = vsp1_rwpf_init_ctrls(rpf, 0);
 368         if (ret < 0) {
 369                 dev_err(vsp1->dev, "rpf%u: failed to initialize controls\n",
 370                         index);
 371                 goto error;
 372         }
 373
 374         v4l2_ctrl_handler_setup(&rpf->ctrls);
 375
 376         return rpf;
 377
 378 error:
 379         vsp1_entity_destroy(&rpf->entity);
 380         return ERR_PTR(ret);
 381 }