drivers/gpu/drm/mediatek/mtk_drm_plane.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2015 MediaTek Inc.
   4  * Author: CK Hu <[email protected]>
   5  */
   6
   7 #include <drm/drm_atomic.h>
   8 #include <drm/drm_atomic_helper.h>
   9 #include <drm/drm_atomic_uapi.h>
  10 #include <drm/drm_blend.h>
  11 #include <drm/drm_fourcc.h>
  12 #include <drm/drm_framebuffer.h>
  13 #include <drm/drm_gem_atomic_helper.h>
  14 #include <linux/align.h>
  15
  16 #include "mtk_drm_crtc.h"
  17 #include "mtk_drm_ddp_comp.h"
  18 #include "mtk_drm_drv.h"
  19 #include "mtk_drm_gem.h"
  20 #include "mtk_drm_plane.h"
  21
  22 static const u64 modifiers[] = {
  23         DRM_FORMAT_MOD_LINEAR,
  24         DRM_FORMAT_MOD_ARM_AFBC(AFBC_FORMAT_MOD_BLOCK_SIZE_32x8 |
  25                                 AFBC_FORMAT_MOD_SPLIT |
  26                                 AFBC_FORMAT_MOD_SPARSE),
  27         DRM_FORMAT_MOD_INVALID,
  28 };
  29
  30 static void mtk_plane_reset(struct drm_plane *plane)
  31 {
  32         struct mtk_plane_state *state;
  33
  34         if (plane->state) {
  35                 __drm_atomic_helper_plane_destroy_state(plane->state);
  36
  37                 state = to_mtk_plane_state(plane->state);
  38                 memset(state, 0, sizeof(*state));
  39         } else {
  40                 state = kzalloc(sizeof(*state), GFP_KERNEL);
  41                 if (!state)
  42                         return;
  43         }
  44
  45         __drm_atomic_helper_plane_reset(plane, &state->base);
  46
  47         state->base.plane = plane;
  48         state->pending.format = DRM_FORMAT_RGB565;
  49         state->pending.modifier = DRM_FORMAT_MOD_LINEAR;
  50 }
  51
  52 static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
  53 {
  54         struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
  55         struct mtk_plane_state *state;
  56
  57         state = kmalloc(sizeof(*state), GFP_KERNEL);
  58         if (!state)
  59                 return NULL;
  60
  61         __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
  62
  63         WARN_ON(state->base.plane != plane);
  64
  65         state->pending = old_state->pending;
  66
  67         return &state->base;
  68 }
  69
  70 static bool mtk_plane_format_mod_supported(struct drm_plane *plane,
  71                                            uint32_t format,
  72                                            uint64_t modifier)
  73 {
  74         if (modifier == DRM_FORMAT_MOD_LINEAR)
  75                 return true;
  76
  77         if (modifier != DRM_FORMAT_MOD_ARM_AFBC(
  78                                 AFBC_FORMAT_MOD_BLOCK_SIZE_32x8 |
  79                                 AFBC_FORMAT_MOD_SPLIT |
  80                                 AFBC_FORMAT_MOD_SPARSE))
  81                 return false;
  82
  83         if (format != DRM_FORMAT_XRGB8888 &&
  84             format != DRM_FORMAT_ARGB8888 &&
  85             format != DRM_FORMAT_BGRX8888 &&
  86             format != DRM_FORMAT_BGRA8888 &&
  87             format != DRM_FORMAT_ABGR8888 &&
  88             format != DRM_FORMAT_XBGR8888 &&
  89             format != DRM_FORMAT_RGB888 &&
  90             format != DRM_FORMAT_BGR888)
  91                 return false;
  92
  93         return true;
  94 }
  95
  96 static void mtk_drm_plane_destroy_state(struct drm_plane *plane,
  97                                         struct drm_plane_state *state)
  98 {
  99         __drm_atomic_helper_plane_destroy_state(state);
 100         kfree(to_mtk_plane_state(state));
 101 }
 102
 103 static int mtk_plane_atomic_async_check(struct drm_plane *plane,
 104                                         struct drm_atomic_state *state)
 105 {
 106         struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
 107                                                                                  plane);
 108         struct drm_crtc_state *crtc_state;
 109         int ret;
 110
 111         if (plane != new_plane_state->crtc->cursor)
 112                 return -EINVAL;
 113
 114         if (!plane->state)
 115                 return -EINVAL;
 116
 117         if (!plane->state->fb)
 118                 return -EINVAL;
 119
 120         ret = mtk_drm_crtc_plane_check(new_plane_state->crtc, plane,
 121                                        to_mtk_plane_state(new_plane_state));
 122         if (ret)
 123                 return ret;
 124
 125         crtc_state = drm_atomic_get_existing_crtc_state(state, new_plane_state->crtc);
 126
 127         return drm_atomic_helper_check_plane_state(plane->state, crtc_state,
 128                                                    DRM_PLANE_NO_SCALING,
 129                                                    DRM_PLANE_NO_SCALING,
 130                                                    true, true);
 131 }
 132
 133 static void mtk_plane_update_new_state(struct drm_plane_state *new_state,
 134                                        struct mtk_plane_state *mtk_plane_state)
 135 {
 136         struct drm_framebuffer *fb = new_state->fb;
 137         struct drm_gem_object *gem;
 138         struct mtk_drm_gem_obj *mtk_gem;
 139         unsigned int pitch, format;
 140         u64 modifier;
 141         dma_addr_t addr;
 142         dma_addr_t hdr_addr = 0;
 143         unsigned int hdr_pitch = 0;
 144         int offset;
 145
 146         gem = fb->obj[0];
 147         mtk_gem = to_mtk_gem_obj(gem);
 148         addr = mtk_gem->dma_addr;
 149         pitch = fb->pitches[0];
 150         format = fb->format->format;
 151         modifier = fb->modifier;
 152
 153         if (modifier == DRM_FORMAT_MOD_LINEAR) {
 154                 /*
 155                  * Using dma_addr_t variable to calculate with multiplier of different types,
 156                  * for example: addr += (new_state->src.x1 >> 16) * fb->format->cpp[0];
 157                  * may cause coverity issue with unintentional overflow.
 158                  */
 159                 offset = (new_state->src.x1 >> 16) * fb->format->cpp[0];
 160                 addr += offset;
 161                 offset = (new_state->src.y1 >> 16) * pitch;
 162                 addr += offset;
 163         } else {
 164                 int width_in_blocks = ALIGN(fb->width, AFBC_DATA_BLOCK_WIDTH)
 165                                       / AFBC_DATA_BLOCK_WIDTH;
 166                 int height_in_blocks = ALIGN(fb->height, AFBC_DATA_BLOCK_HEIGHT)
 167                                        / AFBC_DATA_BLOCK_HEIGHT;
 168                 int x_offset_in_blocks = (new_state->src.x1 >> 16) / AFBC_DATA_BLOCK_WIDTH;
 169                 int y_offset_in_blocks = (new_state->src.y1 >> 16) / AFBC_DATA_BLOCK_HEIGHT;
 170                 int hdr_size, hdr_offset;
 171
 172                 hdr_pitch = width_in_blocks * AFBC_HEADER_BLOCK_SIZE;
 173                 pitch = width_in_blocks * AFBC_DATA_BLOCK_WIDTH *
 174                         AFBC_DATA_BLOCK_HEIGHT * fb->format->cpp[0];
 175
 176                 hdr_size = ALIGN(hdr_pitch * height_in_blocks, AFBC_HEADER_ALIGNMENT);
 177                 hdr_offset = hdr_pitch * y_offset_in_blocks +
 178                         AFBC_HEADER_BLOCK_SIZE * x_offset_in_blocks;
 179
 180                 /*
 181                  * Using dma_addr_t variable to calculate with multiplier of different types,
 182                  * for example: addr += hdr_pitch * y_offset_in_blocks;
 183                  * may cause coverity issue with unintentional overflow.
 184                  */
 185                 hdr_addr = addr + hdr_offset;
 186
 187                 /* The data plane is offset by 1 additional block. */
 188                 offset = pitch * y_offset_in_blocks +
 189                          AFBC_DATA_BLOCK_WIDTH * AFBC_DATA_BLOCK_HEIGHT *
 190                          fb->format->cpp[0] * (x_offset_in_blocks + 1);
 191
 192                 /*
 193                  * Using dma_addr_t variable to calculate with multiplier of different types,
 194                  * for example: addr += pitch * y_offset_in_blocks;
 195                  * may cause coverity issue with unintentional overflow.
 196                  */
 197                 addr = addr + hdr_size + offset;
 198         }
 199
 200         mtk_plane_state->pending.enable = true;
 201         mtk_plane_state->pending.pitch = pitch;
 202         mtk_plane_state->pending.hdr_pitch = hdr_pitch;
 203         mtk_plane_state->pending.format = format;
 204         mtk_plane_state->pending.modifier = modifier;
 205         mtk_plane_state->pending.addr = addr;
 206         mtk_plane_state->pending.hdr_addr = hdr_addr;
 207         mtk_plane_state->pending.x = new_state->dst.x1;
 208         mtk_plane_state->pending.y = new_state->dst.y1;
 209         mtk_plane_state->pending.width = drm_rect_width(&new_state->dst);
 210         mtk_plane_state->pending.height = drm_rect_height(&new_state->dst);
 211         mtk_plane_state->pending.rotation = new_state->rotation;
 212         mtk_plane_state->pending.color_encoding = new_state->color_encoding;
 213 }
 214
 215 static void mtk_plane_atomic_async_update(struct drm_plane *plane,
 216                                           struct drm_atomic_state *state)
 217 {
 218         struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
 219                                                                            plane);
 220         struct mtk_plane_state *new_plane_state = to_mtk_plane_state(plane->state);
 221
 222         plane->state->crtc_x = new_state->crtc_x;
 223         plane->state->crtc_y = new_state->crtc_y;
 224         plane->state->crtc_h = new_state->crtc_h;
 225         plane->state->crtc_w = new_state->crtc_w;
 226         plane->state->src_x = new_state->src_x;
 227         plane->state->src_y = new_state->src_y;
 228         plane->state->src_h = new_state->src_h;
 229         plane->state->src_w = new_state->src_w;
 230
 231         mtk_plane_update_new_state(new_state, new_plane_state);
 232         swap(plane->state->fb, new_state->fb);
 233         wmb(); /* Make sure the above parameters are set before update */
 234         new_plane_state->pending.async_dirty = true;
 235         mtk_drm_crtc_async_update(new_state->crtc, plane, state);
 236 }
 237
 238 static const struct drm_plane_funcs mtk_plane_funcs = {
 239         .update_plane = drm_atomic_helper_update_plane,
 240         .disable_plane = drm_atomic_helper_disable_plane,
 241         .destroy = drm_plane_cleanup,
 242         .reset = mtk_plane_reset,
 243         .atomic_duplicate_state = mtk_plane_duplicate_state,
 244         .atomic_destroy_state = mtk_drm_plane_destroy_state,
 245         .format_mod_supported = mtk_plane_format_mod_supported,
 246 };
 247
 248 static int mtk_plane_atomic_check(struct drm_plane *plane,
 249                                   struct drm_atomic_state *state)
 250 {
 251         struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
 252                                                                                  plane);
 253         struct drm_framebuffer *fb = new_plane_state->fb;
 254         struct drm_crtc_state *crtc_state;
 255         int ret;
 256
 257         if (!fb)
 258                 return 0;
 259
 260         if (WARN_ON(!new_plane_state->crtc))
 261                 return 0;
 262
 263         ret = mtk_drm_crtc_plane_check(new_plane_state->crtc, plane,
 264                                        to_mtk_plane_state(new_plane_state));
 265         if (ret)
 266                 return ret;
 267
 268         crtc_state = drm_atomic_get_crtc_state(state,
 269                                                new_plane_state->crtc);
 270         if (IS_ERR(crtc_state))
 271                 return PTR_ERR(crtc_state);
 272
 273         return drm_atomic_helper_check_plane_state(new_plane_state,
 274                                                    crtc_state,
 275                                                    DRM_PLANE_NO_SCALING,
 276                                                    DRM_PLANE_NO_SCALING,
 277                                                    true, true);
 278 }
 279
 280 static void mtk_plane_atomic_disable(struct drm_plane *plane,
 281                                      struct drm_atomic_state *state)
 282 {
 283         struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
 284                                                                            plane);
 285         struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
 286         mtk_plane_state->pending.enable = false;
 287         wmb(); /* Make sure the above parameter is set before update */
 288         mtk_plane_state->pending.dirty = true;
 289 }
 290
 291 static void mtk_plane_atomic_update(struct drm_plane *plane,
 292                                     struct drm_atomic_state *state)
 293 {
 294         struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
 295                                                                            plane);
 296         struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
 297
 298         if (!new_state->crtc || WARN_ON(!new_state->fb))
 299                 return;
 300
 301         if (!new_state->visible) {
 302                 mtk_plane_atomic_disable(plane, state);
 303                 return;
 304         }
 305
 306         mtk_plane_update_new_state(new_state, mtk_plane_state);
 307         wmb(); /* Make sure the above parameters are set before update */
 308         mtk_plane_state->pending.dirty = true;
 309 }
 310
 311 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
 312         .atomic_check = mtk_plane_atomic_check,
 313         .atomic_update = mtk_plane_atomic_update,
 314         .atomic_disable = mtk_plane_atomic_disable,
 315         .atomic_async_update = mtk_plane_atomic_async_update,
 316         .atomic_async_check = mtk_plane_atomic_async_check,
 317 };
 318
 319 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
 320                    unsigned long possible_crtcs, enum drm_plane_type type,
 321                    unsigned int supported_rotations, const u32 *formats,
 322                    size_t num_formats)
 323 {
 324         int err;
 325
 326         if (!formats || !num_formats) {
 327                 DRM_ERROR("no formats for plane\n");
 328                 return -EINVAL;
 329         }
 330
 331         err = drm_universal_plane_init(dev, plane, possible_crtcs,
 332                                        &mtk_plane_funcs, formats,
 333                                        num_formats, modifiers, type, NULL);
 334         if (err) {
 335                 DRM_ERROR("failed to initialize plane\n");
 336                 return err;
 337         }
 338
 339         if (supported_rotations & ~DRM_MODE_ROTATE_0) {
 340                 err = drm_plane_create_rotation_property(plane,
 341                                                          DRM_MODE_ROTATE_0,
 342                                                          supported_rotations);
 343                 if (err)
 344                         DRM_INFO("Create rotation property failed\n");
 345         }
 346
 347         drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
 348
 349         return 0;
 350 }