drivers/gpu/drm/sun4i/sun8i_vi_layer.c

   1 /*
   2  * Copyright (C) Jernej Skrabec <jernej.skrabec@siol.net>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of
   7  * the License, or (at your option) any later version.
   8  */
   9
  10 #include <drm/drm_atomic.h>
  11 #include <drm/drm_atomic_helper.h>
  12 #include <drm/drm_crtc.h>
  13 #include <drm/drm_crtc_helper.h>
  14 #include <drm/drm_fb_cma_helper.h>
  15 #include <drm/drm_gem_cma_helper.h>
  16 #include <drm/drm_gem_framebuffer_helper.h>
  17 #include <drm/drm_plane_helper.h>
  18 #include <drm/drmP.h>
  19
  20 #include "sun8i_vi_layer.h"
  21 #include "sun8i_mixer.h"
  22 #include "sun8i_vi_scaler.h"
  23
  24 static void sun8i_vi_layer_enable(struct sun8i_mixer *mixer, int channel,
  25                                   int overlay, bool enable, unsigned int zpos,
  26                                   unsigned int old_zpos)
  27 {
  28         u32 val, bld_base, ch_base;
  29
  30         bld_base = sun8i_blender_base(mixer);
  31         ch_base = sun8i_channel_base(mixer, channel);
  32
  33         DRM_DEBUG_DRIVER("%sabling VI channel %d overlay %d\n",
  34                          enable ? "En" : "Dis", channel, overlay);
  35
  36         if (enable)
  37                 val = SUN8I_MIXER_CHAN_VI_LAYER_ATTR_EN;
  38         else
  39                 val = 0;
  40
  41         regmap_update_bits(mixer->engine.regs,
  42                            SUN8I_MIXER_CHAN_VI_LAYER_ATTR(ch_base, overlay),
  43                            SUN8I_MIXER_CHAN_VI_LAYER_ATTR_EN, val);
  44
  45         if (!enable || zpos != old_zpos) {
  46                 regmap_update_bits(mixer->engine.regs,
  47                                    SUN8I_MIXER_BLEND_PIPE_CTL(bld_base),
  48                                    SUN8I_MIXER_BLEND_PIPE_CTL_EN(old_zpos),
  49                                    0);
  50
  51                 regmap_update_bits(mixer->engine.regs,
  52                                    SUN8I_MIXER_BLEND_ROUTE(bld_base),
  53                                    SUN8I_MIXER_BLEND_ROUTE_PIPE_MSK(old_zpos),
  54                                    0);
  55         }
  56
  57         if (enable) {
  58                 val = SUN8I_MIXER_BLEND_PIPE_CTL_EN(zpos);
  59
  60                 regmap_update_bits(mixer->engine.regs,
  61                                    SUN8I_MIXER_BLEND_PIPE_CTL(bld_base),
  62                                    val, val);
  63
  64                 val = channel << SUN8I_MIXER_BLEND_ROUTE_PIPE_SHIFT(zpos);
  65
  66                 regmap_update_bits(mixer->engine.regs,
  67                                    SUN8I_MIXER_BLEND_ROUTE(bld_base),
  68                                    SUN8I_MIXER_BLEND_ROUTE_PIPE_MSK(zpos),
  69                                    val);
  70         }
  71 }
  72
  73 static int sun8i_vi_layer_update_coord(struct sun8i_mixer *mixer, int channel,
  74                                        int overlay, struct drm_plane *plane,
  75                                        unsigned int zpos)
  76 {
  77         struct drm_plane_state *state = plane->state;
  78         const struct drm_format_info *format = state->fb->format;
  79         u32 src_w, src_h, dst_w, dst_h;
  80         u32 bld_base, ch_base;
  81         u32 outsize, insize;
  82         u32 hphase, vphase;
  83         bool subsampled;
  84
  85         DRM_DEBUG_DRIVER("Updating VI channel %d overlay %d\n",
  86                          channel, overlay);
  87
  88         bld_base = sun8i_blender_base(mixer);
  89         ch_base = sun8i_channel_base(mixer, channel);
  90
  91         src_w = drm_rect_width(&state->src) >> 16;
  92         src_h = drm_rect_height(&state->src) >> 16;
  93         dst_w = drm_rect_width(&state->dst);
  94         dst_h = drm_rect_height(&state->dst);
  95
  96         hphase = state->src.x1 & 0xffff;
  97         vphase = state->src.y1 & 0xffff;
  98
  99         /* make coordinates dividable by subsampling factor */
 100         if (format->hsub > 1) {
 101                 int mask, remainder;
 102
 103                 mask = format->hsub - 1;
 104                 remainder = (state->src.x1 >> 16) & mask;
 105                 src_w = (src_w + remainder) & ~mask;
 106                 hphase += remainder << 16;
 107         }
 108
 109         if (format->vsub > 1) {
 110                 int mask, remainder;
 111
 112                 mask = format->vsub - 1;
 113                 remainder = (state->src.y1 >> 16) & mask;
 114                 src_h = (src_h + remainder) & ~mask;
 115                 vphase += remainder << 16;
 116         }
 117
 118         insize = SUN8I_MIXER_SIZE(src_w, src_h);
 119         outsize = SUN8I_MIXER_SIZE(dst_w, dst_h);
 120
 121         /* Set height and width */
 122         DRM_DEBUG_DRIVER("Layer source offset X: %d Y: %d\n",
 123                          (state->src.x1 >> 16) & ~(format->hsub - 1),
 124                          (state->src.y1 >> 16) & ~(format->vsub - 1));
 125         DRM_DEBUG_DRIVER("Layer source size W: %d H: %d\n", src_w, src_h);
 126         regmap_write(mixer->engine.regs,
 127                      SUN8I_MIXER_CHAN_VI_LAYER_SIZE(ch_base, overlay),
 128                      insize);
 129         regmap_write(mixer->engine.regs,
 130                      SUN8I_MIXER_CHAN_VI_OVL_SIZE(ch_base),
 131                      insize);
 132
 133         /*
 134          * Scaler must be enabled for subsampled formats, so it scales
 135          * chroma to same size as luma.
 136          */
 137         subsampled = format->hsub > 1 || format->vsub > 1;
 138
 139         if (insize != outsize || subsampled || hphase || vphase) {
 140                 u32 hscale, vscale;
 141
 142                 DRM_DEBUG_DRIVER("HW scaling is enabled\n");
 143
 144                 hscale = state->src_w / state->crtc_w;
 145                 vscale = state->src_h / state->crtc_h;
 146
 147                 sun8i_vi_scaler_setup(mixer, channel, src_w, src_h, dst_w,
 148                                       dst_h, hscale, vscale, hphase, vphase,
 149                                       format);
 150                 sun8i_vi_scaler_enable(mixer, channel, true);
 151         } else {
 152                 DRM_DEBUG_DRIVER("HW scaling is not needed\n");
 153                 sun8i_vi_scaler_enable(mixer, channel, false);
 154         }
 155
 156         /* Set base coordinates */
 157         DRM_DEBUG_DRIVER("Layer destination coordinates X: %d Y: %d\n",
 158                          state->dst.x1, state->dst.y1);
 159         DRM_DEBUG_DRIVER("Layer destination size W: %d H: %d\n", dst_w, dst_h);
 160         regmap_write(mixer->engine.regs,
 161                      SUN8I_MIXER_BLEND_ATTR_COORD(bld_base, zpos),
 162                      SUN8I_MIXER_COORD(state->dst.x1, state->dst.y1));
 163         regmap_write(mixer->engine.regs,
 164                      SUN8I_MIXER_BLEND_ATTR_INSIZE(bld_base, zpos),
 165                      outsize);
 166
 167         return 0;
 168 }
 169
 170 static int sun8i_vi_layer_update_formats(struct sun8i_mixer *mixer, int channel,
 171                                          int overlay, struct drm_plane *plane)
 172 {
 173         struct drm_plane_state *state = plane->state;
 174         const struct de2_fmt_info *fmt_info;
 175         u32 val, ch_base;
 176
 177         ch_base = sun8i_channel_base(mixer, channel);
 178
 179         fmt_info = sun8i_mixer_format_info(state->fb->format->format);
 180         if (!fmt_info) {
 181                 DRM_DEBUG_DRIVER("Invalid format\n");
 182                 return -EINVAL;
 183         }
 184
 185         val = fmt_info->de2_fmt << SUN8I_MIXER_CHAN_VI_LAYER_ATTR_FBFMT_OFFSET;
 186         regmap_update_bits(mixer->engine.regs,
 187                            SUN8I_MIXER_CHAN_VI_LAYER_ATTR(ch_base, overlay),
 188                            SUN8I_MIXER_CHAN_VI_LAYER_ATTR_FBFMT_MASK, val);
 189
 190         if (fmt_info->csc != SUN8I_CSC_MODE_OFF) {
 191                 sun8i_csc_set_ccsc_coefficients(mixer, channel, fmt_info->csc);
 192                 sun8i_csc_enable_ccsc(mixer, channel, true);
 193         } else {
 194                 sun8i_csc_enable_ccsc(mixer, channel, false);
 195         }
 196
 197         if (fmt_info->rgb)
 198                 val = SUN8I_MIXER_CHAN_VI_LAYER_ATTR_RGB_MODE;
 199         else
 200                 val = 0;
 201
 202         regmap_update_bits(mixer->engine.regs,
 203                            SUN8I_MIXER_CHAN_VI_LAYER_ATTR(ch_base, overlay),
 204                            SUN8I_MIXER_CHAN_VI_LAYER_ATTR_RGB_MODE, val);
 205
 206         /* It seems that YUV formats use global alpha setting. */
 207         if (mixer->cfg->is_de3)
 208                 regmap_update_bits(mixer->engine.regs,
 209                                    SUN8I_MIXER_CHAN_VI_LAYER_ATTR(ch_base,
 210                                                                   overlay),
 211                                    SUN50I_MIXER_CHAN_VI_LAYER_ATTR_ALPHA_MASK,
 212                                    SUN50I_MIXER_CHAN_VI_LAYER_ATTR_ALPHA(0xff));
 213
 214         return 0;
 215 }
 216
 217 static int sun8i_vi_layer_update_buffer(struct sun8i_mixer *mixer, int channel,
 218                                         int overlay, struct drm_plane *plane)
 219 {
 220         struct drm_plane_state *state = plane->state;
 221         struct drm_framebuffer *fb = state->fb;
 222         const struct drm_format_info *format = fb->format;
 223         struct drm_gem_cma_object *gem;
 224         u32 dx, dy, src_x, src_y;
 225         dma_addr_t paddr;
 226         u32 ch_base;
 227         int i;
 228
 229         ch_base = sun8i_channel_base(mixer, channel);
 230
 231         /* Adjust x and y to be dividable by subsampling factor */
 232         src_x = (state->src.x1 >> 16) & ~(format->hsub - 1);
 233         src_y = (state->src.y1 >> 16) & ~(format->vsub - 1);
 234
 235         for (i = 0; i < format->num_planes; i++) {
 236                 /* Get the physical address of the buffer in memory */
 237                 gem = drm_fb_cma_get_gem_obj(fb, i);
 238
 239                 DRM_DEBUG_DRIVER("Using GEM @ %pad\n", &gem->paddr);
 240
 241                 /* Compute the start of the displayed memory */
 242                 paddr = gem->paddr + fb->offsets[i];
 243
 244                 dx = src_x;
 245                 dy = src_y;
 246
 247                 if (i > 0) {
 248                         dx /= format->hsub;
 249                         dy /= format->vsub;
 250                 }
 251
 252                 /* Fixup framebuffer address for src coordinates */
 253                 paddr += dx * format->cpp[i];
 254                 paddr += dy * fb->pitches[i];
 255
 256                 /* Set the line width */
 257                 DRM_DEBUG_DRIVER("Layer %d. line width: %d bytes\n",
 258                                  i + 1, fb->pitches[i]);
 259                 regmap_write(mixer->engine.regs,
 260                              SUN8I_MIXER_CHAN_VI_LAYER_PITCH(ch_base,
 261                                                              overlay, i),
 262                              fb->pitches[i]);
 263
 264                 DRM_DEBUG_DRIVER("Setting %d. buffer address to %pad\n",
 265                                  i + 1, &paddr);
 266
 267                 regmap_write(mixer->engine.regs,
 268                              SUN8I_MIXER_CHAN_VI_LAYER_TOP_LADDR(ch_base,
 269                                                                  overlay, i),
 270                              lower_32_bits(paddr));
 271         }
 272
 273         return 0;
 274 }
 275
 276 static int sun8i_vi_layer_atomic_check(struct drm_plane *plane,
 277                                        struct drm_plane_state *state)
 278 {
 279         struct sun8i_vi_layer *layer = plane_to_sun8i_vi_layer(plane);
 280         struct drm_crtc *crtc = state->crtc;
 281         struct drm_crtc_state *crtc_state;
 282         int min_scale, max_scale;
 283
 284         if (!crtc)
 285                 return 0;
 286
 287         crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
 288         if (WARN_ON(!crtc_state))
 289                 return -EINVAL;
 290
 291         min_scale = DRM_PLANE_HELPER_NO_SCALING;
 292         max_scale = DRM_PLANE_HELPER_NO_SCALING;
 293
 294         if (layer->mixer->cfg->scaler_mask & BIT(layer->channel)) {
 295                 min_scale = SUN8I_VI_SCALER_SCALE_MIN;
 296                 max_scale = SUN8I_VI_SCALER_SCALE_MAX;
 297         }
 298
 299         return drm_atomic_helper_check_plane_state(state, crtc_state,
 300                                                    min_scale, max_scale,
 301                                                    true, true);
 302 }
 303
 304 static void sun8i_vi_layer_atomic_disable(struct drm_plane *plane,
 305                                           struct drm_plane_state *old_state)
 306 {
 307         struct sun8i_vi_layer *layer = plane_to_sun8i_vi_layer(plane);
 308         unsigned int old_zpos = old_state->normalized_zpos;
 309         struct sun8i_mixer *mixer = layer->mixer;
 310
 311         sun8i_vi_layer_enable(mixer, layer->channel, layer->overlay, false, 0,
 312                               old_zpos);
 313 }
 314
 315 static void sun8i_vi_layer_atomic_update(struct drm_plane *plane,
 316                                          struct drm_plane_state *old_state)
 317 {
 318         struct sun8i_vi_layer *layer = plane_to_sun8i_vi_layer(plane);
 319         unsigned int zpos = plane->state->normalized_zpos;
 320         unsigned int old_zpos = old_state->normalized_zpos;
 321         struct sun8i_mixer *mixer = layer->mixer;
 322
 323         if (!plane->state->visible) {
 324                 sun8i_vi_layer_enable(mixer, layer->channel,
 325                                       layer->overlay, false, 0, old_zpos);
 326                 return;
 327         }
 328
 329         sun8i_vi_layer_update_coord(mixer, layer->channel,
 330                                     layer->overlay, plane, zpos);
 331         sun8i_vi_layer_update_formats(mixer, layer->channel,
 332                                       layer->overlay, plane);
 333         sun8i_vi_layer_update_buffer(mixer, layer->channel,
 334                                      layer->overlay, plane);
 335         sun8i_vi_layer_enable(mixer, layer->channel, layer->overlay,
 336                               true, zpos, old_zpos);
 337 }
 338
 339 static struct drm_plane_helper_funcs sun8i_vi_layer_helper_funcs = {
 340         .prepare_fb     = drm_gem_fb_prepare_fb,
 341         .atomic_check   = sun8i_vi_layer_atomic_check,
 342         .atomic_disable = sun8i_vi_layer_atomic_disable,
 343         .atomic_update  = sun8i_vi_layer_atomic_update,
 344 };
 345
 346 static const struct drm_plane_funcs sun8i_vi_layer_funcs = {
 347         .atomic_destroy_state   = drm_atomic_helper_plane_destroy_state,
 348         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 349         .destroy                = drm_plane_cleanup,
 350         .disable_plane          = drm_atomic_helper_disable_plane,
 351         .reset                  = drm_atomic_helper_plane_reset,
 352         .update_plane           = drm_atomic_helper_update_plane,
 353 };
 354
 355 /*
 356  * While all RGB formats are supported, VI planes don't support
 357  * alpha blending, so there is no point having formats with alpha
 358  * channel if their opaque analog exist.
 359  */
 360 static const u32 sun8i_vi_layer_formats[] = {
 361         DRM_FORMAT_ABGR1555,
 362         DRM_FORMAT_ABGR4444,
 363         DRM_FORMAT_ARGB1555,
 364         DRM_FORMAT_ARGB4444,
 365         DRM_FORMAT_BGR565,
 366         DRM_FORMAT_BGR888,
 367         DRM_FORMAT_BGRA5551,
 368         DRM_FORMAT_BGRA4444,
 369         DRM_FORMAT_BGRX8888,
 370         DRM_FORMAT_RGB565,
 371         DRM_FORMAT_RGB888,
 372         DRM_FORMAT_RGBA4444,
 373         DRM_FORMAT_RGBA5551,
 374         DRM_FORMAT_RGBX8888,
 375         DRM_FORMAT_XBGR8888,
 376         DRM_FORMAT_XRGB8888,
 377
 378         DRM_FORMAT_NV16,
 379         DRM_FORMAT_NV12,
 380         DRM_FORMAT_NV21,
 381         DRM_FORMAT_NV61,
 382         DRM_FORMAT_UYVY,
 383         DRM_FORMAT_VYUY,
 384         DRM_FORMAT_YUYV,
 385         DRM_FORMAT_YVYU,
 386         DRM_FORMAT_YUV411,
 387         DRM_FORMAT_YUV420,
 388         DRM_FORMAT_YUV422,
 389         DRM_FORMAT_YUV444,
 390         DRM_FORMAT_YVU411,
 391         DRM_FORMAT_YVU420,
 392         DRM_FORMAT_YVU422,
 393         DRM_FORMAT_YVU444,
 394 };
 395
 396 struct sun8i_vi_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
 397                                                struct sun8i_mixer *mixer,
 398                                                int index)
 399 {
 400         struct sun8i_vi_layer *layer;
 401         unsigned int plane_cnt;
 402         int ret;
 403
 404         layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
 405         if (!layer)
 406                 return ERR_PTR(-ENOMEM);
 407
 408         /* possible crtcs are set later */
 409         ret = drm_universal_plane_init(drm, &layer->plane, 0,
 410                                        &sun8i_vi_layer_funcs,
 411                                        sun8i_vi_layer_formats,
 412                                        ARRAY_SIZE(sun8i_vi_layer_formats),
 413                                        NULL, DRM_PLANE_TYPE_OVERLAY, NULL);
 414         if (ret) {
 415                 dev_err(drm->dev, "Couldn't initialize layer\n");
 416                 return ERR_PTR(ret);
 417         }
 418
 419         plane_cnt = mixer->cfg->ui_num + mixer->cfg->vi_num;
 420
 421         ret = drm_plane_create_zpos_property(&layer->plane, index,
 422                                              0, plane_cnt - 1);
 423         if (ret) {
 424                 dev_err(drm->dev, "Couldn't add zpos property\n");
 425                 return ERR_PTR(ret);
 426         }
 427
 428         drm_plane_helper_add(&layer->plane, &sun8i_vi_layer_helper_funcs);
 429         layer->mixer = mixer;
 430         layer->channel = index;
 431         layer->overlay = 0;
 432
 433         return layer;
 434 }