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