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         .set_property = drm_atomic_helper_plane_set_property,
 132         .destroy = malidp_de_plane_destroy,
 133         .reset = malidp_plane_reset,
 134         .atomic_duplicate_state = malidp_duplicate_plane_state,
 135         .atomic_destroy_state = malidp_destroy_plane_state,
 136         .atomic_print_state = malidp_plane_atomic_print_state,
 137 };
 138
 139 static int malidp_se_check_scaling(struct malidp_plane *mp,
 140                                    struct drm_plane_state *state)
 141 {
 142         struct drm_crtc_state *crtc_state =
 143                 drm_atomic_get_existing_crtc_state(state->state, state->crtc);
 144         struct malidp_crtc_state *mc;
 145         struct drm_rect clip = { 0 };
 146         u32 src_w, src_h;
 147         int ret;
 148
 149         if (!crtc_state)
 150                 return -EINVAL;
 151
 152         clip.x2 = crtc_state->adjusted_mode.hdisplay;
 153         clip.y2 = crtc_state->adjusted_mode.vdisplay;
 154         ret = drm_plane_helper_check_state(state, &clip, 0, INT_MAX, true, true);
 155         if (ret)
 156                 return ret;
 157
 158         src_w = state->src_w >> 16;
 159         src_h = state->src_h >> 16;
 160         if ((state->crtc_w == src_w) && (state->crtc_h == src_h)) {
 161                 /* Scaling not necessary for this plane. */
 162                 mc->scaled_planes_mask &= ~(mp->layer->id);
 163                 return 0;
 164         }
 165
 166         if (mp->layer->id & (DE_SMART | DE_GRAPHICS2))
 167                 return -EINVAL;
 168
 169         mc = to_malidp_crtc_state(crtc_state);
 170
 171         mc->scaled_planes_mask |= mp->layer->id;
 172         /* Defer scaling requirements calculation to the crtc check. */
 173         return 0;
 174 }
 175
 176 static int malidp_de_plane_check(struct drm_plane *plane,
 177                                  struct drm_plane_state *state)
 178 {
 179         struct malidp_plane *mp = to_malidp_plane(plane);
 180         struct malidp_plane_state *ms = to_malidp_plane_state(state);
 181         struct drm_framebuffer *fb;
 182         int i, ret;
 183
 184         if (!state->crtc || !state->fb)
 185                 return 0;
 186
 187         fb = state->fb;
 188
 189         ms->format = malidp_hw_get_format_id(&mp->hwdev->map, mp->layer->id,
 190                                             fb->format->format);
 191         if (ms->format == MALIDP_INVALID_FORMAT_ID)
 192                 return -EINVAL;
 193
 194         ms->n_planes = fb->format->num_planes;
 195         for (i = 0; i < ms->n_planes; i++) {
 196                 if (!malidp_hw_pitch_valid(mp->hwdev, fb->pitches[i])) {
 197                         DRM_DEBUG_KMS("Invalid pitch %u for plane %d\n",
 198                                       fb->pitches[i], i);
 199                         return -EINVAL;
 200                 }
 201         }
 202
 203         if ((state->crtc_w > mp->hwdev->max_line_size) ||
 204             (state->crtc_h > mp->hwdev->max_line_size) ||
 205             (state->crtc_w < mp->hwdev->min_line_size) ||
 206             (state->crtc_h < mp->hwdev->min_line_size))
 207                 return -EINVAL;
 208
 209         /*
 210          * DP550/650 video layers can accept 3 plane formats only if
 211          * fb->pitches[1] == fb->pitches[2] since they don't have a
 212          * third plane stride register.
 213          */
 214         if (ms->n_planes == 3 &&
 215             !(mp->hwdev->features & MALIDP_DEVICE_LV_HAS_3_STRIDES) &&
 216             (state->fb->pitches[1] != state->fb->pitches[2]))
 217                 return -EINVAL;
 218
 219         ret = malidp_se_check_scaling(mp, state);
 220         if (ret)
 221                 return ret;
 222
 223         /* packed RGB888 / BGR888 can't be rotated or flipped */
 224         if (state->rotation != DRM_MODE_ROTATE_0 &&
 225             (fb->format->format == DRM_FORMAT_RGB888 ||
 226              fb->format->format == DRM_FORMAT_BGR888))
 227                 return -EINVAL;
 228
 229         ms->rotmem_size = 0;
 230         if (state->rotation & MALIDP_ROTATED_MASK) {
 231                 int val;
 232
 233                 val = mp->hwdev->rotmem_required(mp->hwdev, state->crtc_h,
 234                                                  state->crtc_w,
 235                                                  fb->format->format);
 236                 if (val < 0)
 237                         return val;
 238
 239                 ms->rotmem_size = val;
 240         }
 241
 242         return 0;
 243 }
 244
 245 static void malidp_de_set_plane_pitches(struct malidp_plane *mp,
 246                                         int num_planes, unsigned int pitches[3])
 247 {
 248         int i;
 249         int num_strides = num_planes;
 250
 251         if (!mp->layer->stride_offset)
 252                 return;
 253
 254         if (num_planes == 3)
 255                 num_strides = (mp->hwdev->features &
 256                                MALIDP_DEVICE_LV_HAS_3_STRIDES) ? 3 : 2;
 257
 258         for (i = 0; i < num_strides; ++i)
 259                 malidp_hw_write(mp->hwdev, pitches[i],
 260                                 mp->layer->base +
 261                                 mp->layer->stride_offset + i * 4);
 262 }
 263
 264 static void malidp_de_plane_update(struct drm_plane *plane,
 265                                    struct drm_plane_state *old_state)
 266 {
 267         struct malidp_plane *mp;
 268         const struct malidp_hw_regmap *map;
 269         struct malidp_plane_state *ms = to_malidp_plane_state(plane->state);
 270         u32 src_w, src_h, dest_w, dest_h, val;
 271         int i;
 272
 273         mp = to_malidp_plane(plane);
 274         map = &mp->hwdev->map;
 275
 276         /* convert src values from Q16 fixed point to integer */
 277         src_w = plane->state->src_w >> 16;
 278         src_h = plane->state->src_h >> 16;
 279         dest_w = plane->state->crtc_w;
 280         dest_h = plane->state->crtc_h;
 281
 282         malidp_hw_write(mp->hwdev, ms->format, mp->layer->base);
 283
 284         for (i = 0; i < ms->n_planes; i++) {
 285                 /* calculate the offset for the layer's plane registers */
 286                 u16 ptr = mp->layer->ptr + (i << 4);
 287                 dma_addr_t fb_addr = drm_fb_cma_get_gem_addr(plane->state->fb,
 288                                                              plane->state, i);
 289
 290                 malidp_hw_write(mp->hwdev, lower_32_bits(fb_addr), ptr);
 291                 malidp_hw_write(mp->hwdev, upper_32_bits(fb_addr), ptr + 4);
 292         }
 293         malidp_de_set_plane_pitches(mp, ms->n_planes,
 294                                     plane->state->fb->pitches);
 295
 296         malidp_hw_write(mp->hwdev, LAYER_H_VAL(src_w) | LAYER_V_VAL(src_h),
 297                         mp->layer->base + MALIDP_LAYER_SIZE);
 298
 299         malidp_hw_write(mp->hwdev, LAYER_H_VAL(dest_w) | LAYER_V_VAL(dest_h),
 300                         mp->layer->base + MALIDP_LAYER_COMP_SIZE);
 301
 302         malidp_hw_write(mp->hwdev, LAYER_H_VAL(plane->state->crtc_x) |
 303                         LAYER_V_VAL(plane->state->crtc_y),
 304                         mp->layer->base + MALIDP_LAYER_OFFSET);
 305
 306         if (mp->layer->id == DE_SMART)
 307                 malidp_hw_write(mp->hwdev,
 308                                 LAYER_H_VAL(src_w) | LAYER_V_VAL(src_h),
 309                                 mp->layer->base + MALIDP550_LS_R1_IN_SIZE);
 310
 311         /* first clear the rotation bits */
 312         val = malidp_hw_read(mp->hwdev, mp->layer->base + MALIDP_LAYER_CONTROL);
 313         val &= ~LAYER_ROT_MASK;
 314
 315         /* setup the rotation and axis flip bits */
 316         if (plane->state->rotation & DRM_MODE_ROTATE_MASK)
 317                 val |= ilog2(plane->state->rotation & DRM_MODE_ROTATE_MASK) <<
 318                        LAYER_ROT_OFFSET;
 319         if (plane->state->rotation & DRM_MODE_REFLECT_X)
 320                 val |= LAYER_H_FLIP;
 321         if (plane->state->rotation & DRM_MODE_REFLECT_Y)
 322                 val |= LAYER_V_FLIP;
 323
 324         /*
 325          * always enable pixel alpha blending until we have a way to change
 326          * blend modes
 327          */
 328         val &= ~LAYER_COMP_MASK;
 329         val |= LAYER_COMP_PIXEL;
 330
 331         val &= ~LAYER_FLOWCFG(LAYER_FLOWCFG_MASK);
 332         if (plane->state->crtc) {
 333                 struct malidp_crtc_state *m =
 334                         to_malidp_crtc_state(plane->state->crtc->state);
 335
 336                 if (m->scaler_config.scale_enable &&
 337                     m->scaler_config.plane_src_id == mp->layer->id)
 338                         val |= LAYER_FLOWCFG(LAYER_FLOWCFG_SCALE_SE);
 339         }
 340
 341         /* set the 'enable layer' bit */
 342         val |= LAYER_ENABLE;
 343
 344         malidp_hw_write(mp->hwdev, val,
 345                         mp->layer->base + MALIDP_LAYER_CONTROL);
 346 }
 347
 348 static void malidp_de_plane_disable(struct drm_plane *plane,
 349                                     struct drm_plane_state *state)
 350 {
 351         struct malidp_plane *mp = to_malidp_plane(plane);
 352
 353         malidp_hw_clearbits(mp->hwdev,
 354                             LAYER_ENABLE | LAYER_FLOWCFG(LAYER_FLOWCFG_MASK),
 355                             mp->layer->base + MALIDP_LAYER_CONTROL);
 356 }
 357
 358 static const struct drm_plane_helper_funcs malidp_de_plane_helper_funcs = {
 359         .atomic_check = malidp_de_plane_check,
 360         .atomic_update = malidp_de_plane_update,
 361         .atomic_disable = malidp_de_plane_disable,
 362 };
 363
 364 int malidp_de_planes_init(struct drm_device *drm)
 365 {
 366         struct malidp_drm *malidp = drm->dev_private;
 367         const struct malidp_hw_regmap *map = &malidp->dev->map;
 368         struct malidp_plane *plane = NULL;
 369         enum drm_plane_type plane_type;
 370         unsigned long crtcs = 1 << drm->mode_config.num_crtc;
 371         unsigned long flags = DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_180 |
 372                               DRM_MODE_ROTATE_270 | DRM_MODE_REFLECT_X | DRM_MODE_REFLECT_Y;
 373         u32 *formats;
 374         int ret, i, j, n;
 375
 376         formats = kcalloc(map->n_pixel_formats, sizeof(*formats), GFP_KERNEL);
 377         if (!formats) {
 378                 ret = -ENOMEM;
 379                 goto cleanup;
 380         }
 381
 382         for (i = 0; i < map->n_layers; i++) {
 383                 u8 id = map->layers[i].id;
 384
 385                 plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 386                 if (!plane) {
 387                         ret = -ENOMEM;
 388                         goto cleanup;
 389                 }
 390
 391                 /* build the list of DRM supported formats based on the map */
 392                 for (n = 0, j = 0;  j < map->n_pixel_formats; j++) {
 393                         if ((map->pixel_formats[j].layer & id) == id)
 394                                 formats[n++] = map->pixel_formats[j].format;
 395                 }
 396
 397                 plane_type = (i == 0) ? DRM_PLANE_TYPE_PRIMARY :
 398                                         DRM_PLANE_TYPE_OVERLAY;
 399                 ret = drm_universal_plane_init(drm, &plane->base, crtcs,
 400                                                &malidp_de_plane_funcs, formats,
 401                                                n, plane_type, NULL);
 402                 if (ret < 0)
 403                         goto cleanup;
 404
 405                 drm_plane_helper_add(&plane->base,
 406                                      &malidp_de_plane_helper_funcs);
 407                 plane->hwdev = malidp->dev;
 408                 plane->layer = &map->layers[i];
 409
 410                 if (id == DE_SMART) {
 411                         /*
 412                          * Enable the first rectangle in the SMART layer to be
 413                          * able to use it as a drm plane.
 414                          */
 415                         malidp_hw_write(malidp->dev, 1,
 416                                         plane->layer->base + MALIDP550_LS_ENABLE);
 417                         /* Skip the features which the SMART layer doesn't have. */
 418                         continue;
 419                 }
 420
 421                 drm_plane_create_rotation_property(&plane->base, DRM_MODE_ROTATE_0, flags);
 422                 malidp_hw_write(malidp->dev, MALIDP_ALPHA_LUT,
 423                                 plane->layer->base + MALIDP_LAYER_COMPOSE);
 424         }
 425
 426         kfree(formats);
 427
 428         return 0;
 429
 430 cleanup:
 431         malidp_de_planes_destroy(drm);
 432         kfree(formats);
 433
 434         return ret;
 435 }
 436
 437 void malidp_de_planes_destroy(struct drm_device *drm)
 438 {
 439         struct drm_plane *p, *pt;
 440
 441         list_for_each_entry_safe(p, pt, &drm->mode_config.plane_list, head) {
 442                 drm_plane_cleanup(p);
 443                 kfree(p);
 444         }
 445 }