drivers/gpu/drm/arm/malidp_planes.c

   1 /*
   2  * (C) COPYRIGHT 2016 ARM Limited. All rights reserved.
   3  * Author: Liviu Dudau <Liviu.Dudau@arm.com>
   4  *
   5  * This program is free software and is provided to you under the terms of the
   6  * GNU General Public License version 2 as published by the Free Software
   7  * Foundation, and any use by you of this program is subject to the terms
   8  * of such GNU licence.
   9  *
  10  * ARM Mali DP plane manipulation routines.
  11  */
  12
  13 #include <drm/drmP.h>
  14 #include <drm/drm_atomic.h>
  15 #include <drm/drm_atomic_helper.h>
  16 #include <drm/drm_fb_cma_helper.h>
  17 #include <drm/drm_gem_cma_helper.h>
  18 #include <drm/drm_plane_helper.h>
  19 #include <drm/drm_print.h>
  20
  21 #include "malidp_hw.h"
  22 #include "malidp_drv.h"
  23
  24 /* Layer specific register offsets */
  25 #define MALIDP_LAYER_FORMAT             0x000
  26 #define MALIDP_LAYER_CONTROL            0x004
  27 #define   LAYER_ENABLE                  (1 << 0)
  28 #define   LAYER_FLOWCFG_MASK            7
  29 #define   LAYER_FLOWCFG(x)              (((x) & LAYER_FLOWCFG_MASK) << 1)
  30 #define     LAYER_FLOWCFG_SCALE_SE      3
  31 #define   LAYER_ROT_OFFSET              8
  32 #define   LAYER_H_FLIP                  (1 << 10)
  33 #define   LAYER_V_FLIP                  (1 << 11)
  34 #define   LAYER_ROT_MASK                (0xf << 8)
  35 #define   LAYER_COMP_MASK               (0x3 << 12)
  36 #define   LAYER_COMP_PIXEL              (0x3 << 12)
  37 #define   LAYER_COMP_PLANE              (0x2 << 12)
  38 #define MALIDP_LAYER_COMPOSE            0x008
  39 #define MALIDP_LAYER_SIZE               0x00c
  40 #define   LAYER_H_VAL(x)                (((x) & 0x1fff) << 0)
  41 #define   LAYER_V_VAL(x)                (((x) & 0x1fff) << 16)
  42 #define MALIDP_LAYER_COMP_SIZE          0x010
  43 #define MALIDP_LAYER_OFFSET             0x014
  44 #define MALIDP550_LS_ENABLE             0x01c
  45 #define MALIDP550_LS_R1_IN_SIZE         0x020
  46
  47 /*
  48  * This 4-entry look-up-table is used to determine the full 8-bit alpha value
  49  * for formats with 1- or 2-bit alpha channels.
  50  * We set it to give 100%/0% opacity for 1-bit formats and 100%/66%/33%/0%
  51  * opacity for 2-bit formats.
  52  */
  53 #define MALIDP_ALPHA_LUT 0xffaa5500
  54
  55 static void malidp_de_plane_destroy(struct drm_plane *plane)
  56 {
  57         struct malidp_plane *mp = to_malidp_plane(plane);
  58
  59         if (mp->base.fb)
  60                 drm_framebuffer_unreference(mp->base.fb);
  61
  62         drm_plane_helper_disable(plane);
  63         drm_plane_cleanup(plane);
  64         devm_kfree(plane->dev->dev, mp);
  65 }
  66
  67 /*
  68  * Replicate what the default ->reset hook does: free the state pointer and
  69  * allocate a new empty object. We just need enough space to store
  70  * a malidp_plane_state instead of a drm_plane_state.
  71  */
  72 static void malidp_plane_reset(struct drm_plane *plane)
  73 {
  74         struct malidp_plane_state *state = to_malidp_plane_state(plane->state);
  75
  76         if (state)
  77                 __drm_atomic_helper_plane_destroy_state(&state->base);
  78         kfree(state);
  79         plane->state = NULL;
  80         state = kzalloc(sizeof(*state), GFP_KERNEL);
  81         if (state) {
  82                 state->base.plane = plane;
  83                 state->base.rotation = DRM_MODE_ROTATE_0;
  84                 plane->state = &state->base;
  85         }
  86 }
  87
  88 static struct
  89 drm_plane_state *malidp_duplicate_plane_state(struct drm_plane *plane)
  90 {
  91         struct malidp_plane_state *state, *m_state;
  92
  93         if (!plane->state)
  94                 return NULL;
  95
  96         state = kmalloc(sizeof(*state), GFP_KERNEL);
  97         if (!state)
  98                 return NULL;
  99
 100         m_state = to_malidp_plane_state(plane->state);
 101         __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
 102         state->rotmem_size = m_state->rotmem_size;
 103         state->format = m_state->format;
 104         state->n_planes = m_state->n_planes;
 105
 106         return &state->base;
 107 }
 108
 109 static void malidp_destroy_plane_state(struct drm_plane *plane,
 110                                        struct drm_plane_state *state)
 111 {
 112         struct malidp_plane_state *m_state = to_malidp_plane_state(state);
 113
 114         __drm_atomic_helper_plane_destroy_state(state);
 115         kfree(m_state);
 116 }
 117
 118 static void malidp_plane_atomic_print_state(struct drm_printer *p,
 119                                             const struct drm_plane_state *state)
 120 {
 121         struct malidp_plane_state *ms = to_malidp_plane_state(state);
 122
 123         drm_printf(p, "\trotmem_size=%u\n", ms->rotmem_size);
 124         drm_printf(p, "\tformat_id=%u\n", ms->format);
 125         drm_printf(p, "\tn_planes=%u\n", ms->n_planes);
 126 }
 127
 128 static const struct drm_plane_funcs malidp_de_plane_funcs = {
 129         .update_plane = drm_atomic_helper_update_plane,
 130         .disable_plane = drm_atomic_helper_disable_plane,
 131         .destroy = malidp_de_plane_destroy,
 132         .reset = malidp_plane_reset,
 133         .atomic_duplicate_state = malidp_duplicate_plane_state,
 134         .atomic_destroy_state = malidp_destroy_plane_state,
 135         .atomic_print_state = malidp_plane_atomic_print_state,
 136 };
 137
 138 static int malidp_se_check_scaling(struct malidp_plane *mp,
 139                                    struct drm_plane_state *state)
 140 {
 141         struct drm_crtc_state *crtc_state =
 142                 drm_atomic_get_existing_crtc_state(state->state, state->crtc);
 143         struct malidp_crtc_state *mc;
 144         struct drm_rect clip = { 0 };
 145         u32 src_w, src_h;
 146         int ret;
 147
 148         if (!crtc_state)
 149                 return -EINVAL;
 150
 151         clip.x2 = crtc_state->adjusted_mode.hdisplay;
 152         clip.y2 = crtc_state->adjusted_mode.vdisplay;
 153         ret = drm_plane_helper_check_state(state, &clip, 0, INT_MAX, true, true);
 154         if (ret)
 155                 return ret;
 156
 157         src_w = state->src_w >> 16;
 158         src_h = state->src_h >> 16;
 159         if ((state->crtc_w == src_w) && (state->crtc_h == src_h)) {
 160                 /* Scaling not necessary for this plane. */
 161                 mc->scaled_planes_mask &= ~(mp->layer->id);
 162                 return 0;
 163         }
 164
 165         if (mp->layer->id & (DE_SMART | DE_GRAPHICS2))
 166                 return -EINVAL;
 167
 168         mc = to_malidp_crtc_state(crtc_state);
 169
 170         mc->scaled_planes_mask |= mp->layer->id;
 171         /* Defer scaling requirements calculation to the crtc check. */
 172         return 0;
 173 }
 174
 175 static int malidp_de_plane_check(struct drm_plane *plane,
 176                                  struct drm_plane_state *state)
 177 {
 178         struct malidp_plane *mp = to_malidp_plane(plane);
 179         struct malidp_plane_state *ms = to_malidp_plane_state(state);
 180         struct drm_framebuffer *fb;
 181         int i, ret;
 182
 183         if (!state->crtc || !state->fb)
 184                 return 0;
 185
 186         fb = state->fb;
 187
 188         ms->format = malidp_hw_get_format_id(&mp->hwdev->map, mp->layer->id,
 189                                             fb->format->format);
 190         if (ms->format == MALIDP_INVALID_FORMAT_ID)
 191                 return -EINVAL;
 192
 193         ms->n_planes = fb->format->num_planes;
 194         for (i = 0; i < ms->n_planes; i++) {
 195                 if (!malidp_hw_pitch_valid(mp->hwdev, fb->pitches[i])) {
 196                         DRM_DEBUG_KMS("Invalid pitch %u for plane %d\n",
 197                                       fb->pitches[i], i);
 198                         return -EINVAL;
 199                 }
 200         }
 201
 202         if ((state->crtc_w > mp->hwdev->max_line_size) ||
 203             (state->crtc_h > mp->hwdev->max_line_size) ||
 204             (state->crtc_w < mp->hwdev->min_line_size) ||
 205             (state->crtc_h < mp->hwdev->min_line_size))
 206                 return -EINVAL;
 207
 208         /*
 209          * DP550/650 video layers can accept 3 plane formats only if
 210          * fb->pitches[1] == fb->pitches[2] since they don't have a
 211          * third plane stride register.
 212          */
 213         if (ms->n_planes == 3 &&
 214             !(mp->hwdev->features & MALIDP_DEVICE_LV_HAS_3_STRIDES) &&
 215             (state->fb->pitches[1] != state->fb->pitches[2]))
 216                 return -EINVAL;
 217
 218         ret = malidp_se_check_scaling(mp, state);
 219         if (ret)
 220                 return ret;
 221
 222         /* packed RGB888 / BGR888 can't be rotated or flipped */
 223         if (state->rotation != DRM_MODE_ROTATE_0 &&
 224             (fb->format->format == DRM_FORMAT_RGB888 ||
 225              fb->format->format == DRM_FORMAT_BGR888))
 226                 return -EINVAL;
 227
 228         ms->rotmem_size = 0;
 229         if (state->rotation & MALIDP_ROTATED_MASK) {
 230                 int val;
 231
 232                 val = mp->hwdev->rotmem_required(mp->hwdev, state->crtc_h,
 233                                                  state->crtc_w,
 234                                                  fb->format->format);
 235                 if (val < 0)
 236                         return val;
 237
 238                 ms->rotmem_size = val;
 239         }
 240
 241         return 0;
 242 }
 243
 244 static void malidp_de_set_plane_pitches(struct malidp_plane *mp,
 245                                         int num_planes, unsigned int pitches[3])
 246 {
 247         int i;
 248         int num_strides = num_planes;
 249
 250         if (!mp->layer->stride_offset)
 251                 return;
 252
 253         if (num_planes == 3)
 254                 num_strides = (mp->hwdev->features &
 255                                MALIDP_DEVICE_LV_HAS_3_STRIDES) ? 3 : 2;
 256
 257         for (i = 0; i < num_strides; ++i)
 258                 malidp_hw_write(mp->hwdev, pitches[i],
 259                                 mp->layer->base +
 260                                 mp->layer->stride_offset + i * 4);
 261 }
 262
 263 static void malidp_de_plane_update(struct drm_plane *plane,
 264                                    struct drm_plane_state *old_state)
 265 {
 266         struct malidp_plane *mp;
 267         const struct malidp_hw_regmap *map;
 268         struct malidp_plane_state *ms = to_malidp_plane_state(plane->state);
 269         u32 src_w, src_h, dest_w, dest_h, val;
 270         int i;
 271
 272         mp = to_malidp_plane(plane);
 273         map = &mp->hwdev->map;
 274
 275         /* convert src values from Q16 fixed point to integer */
 276         src_w = plane->state->src_w >> 16;
 277         src_h = plane->state->src_h >> 16;
 278         dest_w = plane->state->crtc_w;
 279         dest_h = plane->state->crtc_h;
 280
 281         malidp_hw_write(mp->hwdev, ms->format, mp->layer->base);
 282
 283         for (i = 0; i < ms->n_planes; i++) {
 284                 /* calculate the offset for the layer's plane registers */
 285                 u16 ptr = mp->layer->ptr + (i << 4);
 286                 dma_addr_t fb_addr = drm_fb_cma_get_gem_addr(plane->state->fb,
 287                                                              plane->state, i);
 288
 289                 malidp_hw_write(mp->hwdev, lower_32_bits(fb_addr), ptr);
 290                 malidp_hw_write(mp->hwdev, upper_32_bits(fb_addr), ptr + 4);
 291         }
 292         malidp_de_set_plane_pitches(mp, ms->n_planes,
 293                                     plane->state->fb->pitches);
 294
 295         malidp_hw_write(mp->hwdev, LAYER_H_VAL(src_w) | LAYER_V_VAL(src_h),
 296                         mp->layer->base + MALIDP_LAYER_SIZE);
 297
 298         malidp_hw_write(mp->hwdev, LAYER_H_VAL(dest_w) | LAYER_V_VAL(dest_h),
 299                         mp->layer->base + MALIDP_LAYER_COMP_SIZE);
 300
 301         malidp_hw_write(mp->hwdev, LAYER_H_VAL(plane->state->crtc_x) |
 302                         LAYER_V_VAL(plane->state->crtc_y),
 303                         mp->layer->base + MALIDP_LAYER_OFFSET);
 304
 305         if (mp->layer->id == DE_SMART)
 306                 malidp_hw_write(mp->hwdev,
 307                                 LAYER_H_VAL(src_w) | LAYER_V_VAL(src_h),
 308                                 mp->layer->base + MALIDP550_LS_R1_IN_SIZE);
 309
 310         /* first clear the rotation bits */
 311         val = malidp_hw_read(mp->hwdev, mp->layer->base + MALIDP_LAYER_CONTROL);
 312         val &= ~LAYER_ROT_MASK;
 313
 314         /* setup the rotation and axis flip bits */
 315         if (plane->state->rotation & DRM_MODE_ROTATE_MASK)
 316                 val |= ilog2(plane->state->rotation & DRM_MODE_ROTATE_MASK) <<
 317                        LAYER_ROT_OFFSET;
 318         if (plane->state->rotation & DRM_MODE_REFLECT_X)
 319                 val |= LAYER_H_FLIP;
 320         if (plane->state->rotation & DRM_MODE_REFLECT_Y)
 321                 val |= LAYER_V_FLIP;
 322
 323         /*
 324          * always enable pixel alpha blending until we have a way to change
 325          * blend modes
 326          */
 327         val &= ~LAYER_COMP_MASK;
 328         val |= LAYER_COMP_PIXEL;
 329
 330         val &= ~LAYER_FLOWCFG(LAYER_FLOWCFG_MASK);
 331         if (plane->state->crtc) {
 332                 struct malidp_crtc_state *m =
 333                         to_malidp_crtc_state(plane->state->crtc->state);
 334
 335                 if (m->scaler_config.scale_enable &&
 336                     m->scaler_config.plane_src_id == mp->layer->id)
 337                         val |= LAYER_FLOWCFG(LAYER_FLOWCFG_SCALE_SE);
 338         }
 339
 340         /* set the 'enable layer' bit */
 341         val |= LAYER_ENABLE;
 342
 343         malidp_hw_write(mp->hwdev, val,
 344                         mp->layer->base + MALIDP_LAYER_CONTROL);
 345 }
 346
 347 static void malidp_de_plane_disable(struct drm_plane *plane,
 348                                     struct drm_plane_state *state)
 349 {
 350         struct malidp_plane *mp = to_malidp_plane(plane);
 351
 352         malidp_hw_clearbits(mp->hwdev,
 353                             LAYER_ENABLE | LAYER_FLOWCFG(LAYER_FLOWCFG_MASK),
 354                             mp->layer->base + MALIDP_LAYER_CONTROL);
 355 }
 356
 357 static const struct drm_plane_helper_funcs malidp_de_plane_helper_funcs = {
 358         .atomic_check = malidp_de_plane_check,
 359         .atomic_update = malidp_de_plane_update,
 360         .atomic_disable = malidp_de_plane_disable,
 361 };
 362
 363 int malidp_de_planes_init(struct drm_device *drm)
 364 {
 365         struct malidp_drm *malidp = drm->dev_private;
 366         const struct malidp_hw_regmap *map = &malidp->dev->map;
 367         struct malidp_plane *plane = NULL;
 368         enum drm_plane_type plane_type;
 369         unsigned long crtcs = 1 << drm->mode_config.num_crtc;
 370         unsigned long flags = DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_180 |
 371                               DRM_MODE_ROTATE_270 | DRM_MODE_REFLECT_X | DRM_MODE_REFLECT_Y;
 372         u32 *formats;
 373         int ret, i, j, n;
 374
 375         formats = kcalloc(map->n_pixel_formats, sizeof(*formats), GFP_KERNEL);
 376         if (!formats) {
 377                 ret = -ENOMEM;
 378                 goto cleanup;
 379         }
 380
 381         for (i = 0; i < map->n_layers; i++) {
 382                 u8 id = map->layers[i].id;
 383
 384                 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 385                 if (!plane) {
 386                         ret = -ENOMEM;
 387                         goto cleanup;
 388                 }
 389
 390                 /* build the list of DRM supported formats based on the map */
 391                 for (n = 0, j = 0;  j < map->n_pixel_formats; j++) {
 392                         if ((map->pixel_formats[j].layer & id) == id)
 393                                 formats[n++] = map->pixel_formats[j].format;
 394                 }
 395
 396                 plane_type = (i == 0) ? DRM_PLANE_TYPE_PRIMARY :
 397                                         DRM_PLANE_TYPE_OVERLAY;
 398                 ret = drm_universal_plane_init(drm, &plane->base, crtcs,
 399                                                &malidp_de_plane_funcs, formats,
 400                                                n, NULL, plane_type, NULL);
 401                 if (ret < 0)
 402                         goto cleanup;
 403
 404                 drm_plane_helper_add(&plane->base,
 405                                      &malidp_de_plane_helper_funcs);
 406                 plane->hwdev = malidp->dev;
 407                 plane->layer = &map->layers[i];
 408
 409                 if (id == DE_SMART) {
 410                         /*
 411                          * Enable the first rectangle in the SMART layer to be
 412                          * able to use it as a drm plane.
 413                          */
 414                         malidp_hw_write(malidp->dev, 1,
 415                                         plane->layer->base + MALIDP550_LS_ENABLE);
 416                         /* Skip the features which the SMART layer doesn't have. */
 417                         continue;
 418                 }
 419
 420                 drm_plane_create_rotation_property(&plane->base, DRM_MODE_ROTATE_0, flags);
 421                 malidp_hw_write(malidp->dev, MALIDP_ALPHA_LUT,
 422                                 plane->layer->base + MALIDP_LAYER_COMPOSE);
 423         }
 424
 425         kfree(formats);
 426
 427         return 0;
 428
 429 cleanup:
 430         malidp_de_planes_destroy(drm);
 431         kfree(formats);
 432
 433         return ret;
 434 }
 435
 436 void malidp_de_planes_destroy(struct drm_device *drm)
 437 {
 438         struct drm_plane *p, *pt;
 439
 440         list_for_each_entry_safe(p, pt, &drm->mode_config.plane_list, head) {
 441                 drm_plane_cleanup(p);
 442                 kfree(p);
 443         }
 444 }