1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2015 MediaTek Inc. 4 * Author: CK Hu <ck.hu@mediatek.com> 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_crtc.h" 17 #include "mtk_ddp_comp.h" 18 #include "mtk_drm_drv.h" 19 #include "mtk_gem.h" 20 #include "mtk_plane.h" 21 22 static const u64 modifiers[] = { 23 DRM_FORMAT_MOD_LINEAR, 24 DRM_FORMAT_MOD_INVALID, 25 }; 26 27 static void mtk_plane_reset(struct drm_plane *plane) 28 { 29 struct mtk_plane_state *state; 30 31 if (plane->state) { 32 __drm_atomic_helper_plane_destroy_state(plane->state); 33 34 state = to_mtk_plane_state(plane->state); 35 memset(state, 0, sizeof(*state)); 36 } else { 37 state = kzalloc(sizeof(*state), GFP_KERNEL); 38 if (!state) 39 return; 40 } 41 42 __drm_atomic_helper_plane_reset(plane, &state->base); 43 44 state->base.plane = plane; 45 state->pending.format = DRM_FORMAT_RGB565; 46 state->pending.modifier = DRM_FORMAT_MOD_LINEAR; 47 } 48 49 static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane) 50 { 51 struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state); 52 struct mtk_plane_state *state; 53 54 state = kmalloc(sizeof(*state), GFP_KERNEL); 55 if (!state) 56 return NULL; 57 58 __drm_atomic_helper_plane_duplicate_state(plane, &state->base); 59 60 WARN_ON(state->base.plane != plane); 61 62 state->pending = old_state->pending; 63 64 return &state->base; 65 } 66 67 static bool mtk_plane_format_mod_supported(struct drm_plane *plane, 68 uint32_t format, 69 uint64_t modifier) 70 { 71 return modifier == DRM_FORMAT_MOD_LINEAR; 72 } 73 74 static void mtk_plane_destroy_state(struct drm_plane *plane, 75 struct drm_plane_state *state) 76 { 77 __drm_atomic_helper_plane_destroy_state(state); 78 kfree(to_mtk_plane_state(state)); 79 } 80 81 static int mtk_plane_atomic_async_check(struct drm_plane *plane, 82 struct drm_atomic_state *state, bool flip) 83 { 84 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, 85 plane); 86 struct drm_crtc_state *crtc_state; 87 int ret; 88 89 if (plane != new_plane_state->crtc->cursor) 90 return -EINVAL; 91 92 if (!plane->state) 93 return -EINVAL; 94 95 if (!plane->state->fb) 96 return -EINVAL; 97 98 ret = mtk_crtc_plane_check(new_plane_state->crtc, plane, 99 to_mtk_plane_state(new_plane_state)); 100 if (ret) 101 return ret; 102 103 crtc_state = drm_atomic_get_existing_crtc_state(state, new_plane_state->crtc); 104 105 return drm_atomic_helper_check_plane_state(plane->state, crtc_state, 106 DRM_PLANE_NO_SCALING, 107 DRM_PLANE_NO_SCALING, 108 true, true); 109 } 110 111 static void mtk_plane_update_new_state(struct drm_plane_state *new_state, 112 struct mtk_plane_state *mtk_plane_state) 113 { 114 struct drm_framebuffer *fb = new_state->fb; 115 struct drm_gem_object *gem; 116 struct mtk_gem_obj *mtk_gem; 117 unsigned int pitch, format; 118 u64 modifier; 119 dma_addr_t addr; 120 dma_addr_t hdr_addr = 0; 121 unsigned int hdr_pitch = 0; 122 int offset; 123 124 gem = fb->obj[0]; 125 mtk_gem = to_mtk_gem_obj(gem); 126 addr = mtk_gem->dma_addr; 127 pitch = fb->pitches[0]; 128 format = fb->format->format; 129 modifier = fb->modifier; 130 131 if (modifier == DRM_FORMAT_MOD_LINEAR) { 132 /* 133 * Using dma_addr_t variable to calculate with multiplier of different types, 134 * for example: addr += (new_state->src.x1 >> 16) * fb->format->cpp[0]; 135 * may cause coverity issue with unintentional overflow. 136 */ 137 offset = (new_state->src.x1 >> 16) * fb->format->cpp[0]; 138 addr += offset; 139 offset = (new_state->src.y1 >> 16) * pitch; 140 addr += offset; 141 } else { 142 int width_in_blocks = ALIGN(fb->width, AFBC_DATA_BLOCK_WIDTH) 143 / AFBC_DATA_BLOCK_WIDTH; 144 int height_in_blocks = ALIGN(fb->height, AFBC_DATA_BLOCK_HEIGHT) 145 / AFBC_DATA_BLOCK_HEIGHT; 146 int x_offset_in_blocks = (new_state->src.x1 >> 16) / AFBC_DATA_BLOCK_WIDTH; 147 int y_offset_in_blocks = (new_state->src.y1 >> 16) / AFBC_DATA_BLOCK_HEIGHT; 148 int hdr_size, hdr_offset; 149 150 hdr_pitch = width_in_blocks * AFBC_HEADER_BLOCK_SIZE; 151 pitch = width_in_blocks * AFBC_DATA_BLOCK_WIDTH * 152 AFBC_DATA_BLOCK_HEIGHT * fb->format->cpp[0]; 153 154 hdr_size = ALIGN(hdr_pitch * height_in_blocks, AFBC_HEADER_ALIGNMENT); 155 hdr_offset = hdr_pitch * y_offset_in_blocks + 156 AFBC_HEADER_BLOCK_SIZE * x_offset_in_blocks; 157 158 /* 159 * Using dma_addr_t variable to calculate with multiplier of different types, 160 * for example: addr += hdr_pitch * y_offset_in_blocks; 161 * may cause coverity issue with unintentional overflow. 162 */ 163 hdr_addr = addr + hdr_offset; 164 165 /* The data plane is offset by 1 additional block. */ 166 offset = pitch * y_offset_in_blocks + 167 AFBC_DATA_BLOCK_WIDTH * AFBC_DATA_BLOCK_HEIGHT * 168 fb->format->cpp[0] * (x_offset_in_blocks + 1); 169 170 /* 171 * Using dma_addr_t variable to calculate with multiplier of different types, 172 * for example: addr += pitch * y_offset_in_blocks; 173 * may cause coverity issue with unintentional overflow. 174 */ 175 addr = addr + hdr_size + offset; 176 } 177 178 mtk_plane_state->pending.enable = true; 179 mtk_plane_state->pending.pitch = pitch; 180 mtk_plane_state->pending.hdr_pitch = hdr_pitch; 181 mtk_plane_state->pending.format = format; 182 mtk_plane_state->pending.modifier = modifier; 183 mtk_plane_state->pending.addr = addr; 184 mtk_plane_state->pending.hdr_addr = hdr_addr; 185 mtk_plane_state->pending.x = new_state->dst.x1; 186 mtk_plane_state->pending.y = new_state->dst.y1; 187 mtk_plane_state->pending.width = drm_rect_width(&new_state->dst); 188 mtk_plane_state->pending.height = drm_rect_height(&new_state->dst); 189 mtk_plane_state->pending.rotation = new_state->rotation; 190 mtk_plane_state->pending.color_encoding = new_state->color_encoding; 191 } 192 193 static void mtk_plane_atomic_async_update(struct drm_plane *plane, 194 struct drm_atomic_state *state) 195 { 196 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, 197 plane); 198 struct mtk_plane_state *new_plane_state = to_mtk_plane_state(plane->state); 199 200 plane->state->crtc_x = new_state->crtc_x; 201 plane->state->crtc_y = new_state->crtc_y; 202 plane->state->crtc_h = new_state->crtc_h; 203 plane->state->crtc_w = new_state->crtc_w; 204 plane->state->src_x = new_state->src_x; 205 plane->state->src_y = new_state->src_y; 206 plane->state->src_h = new_state->src_h; 207 plane->state->src_w = new_state->src_w; 208 plane->state->dst.x1 = new_state->dst.x1; 209 plane->state->dst.y1 = new_state->dst.y1; 210 211 mtk_plane_update_new_state(new_state, new_plane_state); 212 swap(plane->state->fb, new_state->fb); 213 wmb(); /* Make sure the above parameters are set before update */ 214 new_plane_state->pending.async_dirty = true; 215 mtk_crtc_async_update(new_state->crtc, plane, state); 216 } 217 218 static const struct drm_plane_funcs mtk_plane_funcs = { 219 .update_plane = drm_atomic_helper_update_plane, 220 .disable_plane = drm_atomic_helper_disable_plane, 221 .destroy = drm_plane_cleanup, 222 .reset = mtk_plane_reset, 223 .atomic_duplicate_state = mtk_plane_duplicate_state, 224 .atomic_destroy_state = mtk_plane_destroy_state, 225 .format_mod_supported = mtk_plane_format_mod_supported, 226 }; 227 228 static int mtk_plane_atomic_check(struct drm_plane *plane, 229 struct drm_atomic_state *state) 230 { 231 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, 232 plane); 233 struct drm_framebuffer *fb = new_plane_state->fb; 234 struct drm_crtc_state *crtc_state; 235 int ret; 236 237 if (!fb) 238 return 0; 239 240 if (WARN_ON(!new_plane_state->crtc)) 241 return 0; 242 243 ret = mtk_crtc_plane_check(new_plane_state->crtc, plane, 244 to_mtk_plane_state(new_plane_state)); 245 if (ret) 246 return ret; 247 248 crtc_state = drm_atomic_get_crtc_state(state, 249 new_plane_state->crtc); 250 if (IS_ERR(crtc_state)) 251 return PTR_ERR(crtc_state); 252 253 return drm_atomic_helper_check_plane_state(new_plane_state, 254 crtc_state, 255 DRM_PLANE_NO_SCALING, 256 DRM_PLANE_NO_SCALING, 257 true, true); 258 } 259 260 static void mtk_plane_atomic_disable(struct drm_plane *plane, 261 struct drm_atomic_state *state) 262 { 263 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, 264 plane); 265 struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state); 266 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, 267 plane); 268 269 mtk_plane_state->pending.enable = false; 270 wmb(); /* Make sure the above parameter is set before update */ 271 mtk_plane_state->pending.dirty = true; 272 273 if (old_state && old_state->crtc) 274 mtk_crtc_plane_disable(old_state->crtc, plane); 275 } 276 277 static void mtk_plane_atomic_update(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); 283 284 if (!new_state->crtc || WARN_ON(!new_state->fb)) 285 return; 286 287 if (!new_state->visible) { 288 mtk_plane_atomic_disable(plane, state); 289 return; 290 } 291 292 mtk_plane_update_new_state(new_state, mtk_plane_state); 293 wmb(); /* Make sure the above parameters are set before update */ 294 mtk_plane_state->pending.dirty = true; 295 } 296 297 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = { 298 .atomic_check = mtk_plane_atomic_check, 299 .atomic_update = mtk_plane_atomic_update, 300 .atomic_disable = mtk_plane_atomic_disable, 301 .atomic_async_update = mtk_plane_atomic_async_update, 302 .atomic_async_check = mtk_plane_atomic_async_check, 303 }; 304 305 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane, 306 unsigned long possible_crtcs, enum drm_plane_type type, 307 unsigned int supported_rotations, const u32 blend_modes, 308 const u32 *formats, size_t num_formats, 309 bool supports_afbc, unsigned int plane_idx) 310 { 311 int err; 312 313 if (!formats || !num_formats) { 314 DRM_ERROR("no formats for plane\n"); 315 return -EINVAL; 316 } 317 318 err = drm_universal_plane_init(dev, plane, possible_crtcs, 319 &mtk_plane_funcs, formats, 320 num_formats, 321 supports_afbc ? modifiers : NULL, 322 type, NULL); 323 if (err) { 324 DRM_ERROR("failed to initialize plane\n"); 325 return err; 326 } 327 328 /* 329 * The hardware does not support repositioning planes by muxing: their 330 * Z-position is infact fixed and the only way to change the actual 331 * order is to swap the contents of the entire register set of one 332 * overlay with another, which may be more expensive than desired. 333 * 334 * With no repositioning, the caller of this function guarantees that 335 * the plane_idx is correct. This means that, for example, the PRIMARY 336 * plane fed to this function will always have plane_idx zero. 337 */ 338 err = drm_plane_create_zpos_immutable_property(plane, plane_idx); 339 if (err) { 340 DRM_ERROR("Failed to create zpos property for plane %u\n", plane_idx); 341 return err; 342 } 343 344 if (supported_rotations) { 345 err = drm_plane_create_rotation_property(plane, 346 DRM_MODE_ROTATE_0, 347 supported_rotations); 348 if (err) 349 DRM_INFO("Create rotation property failed\n"); 350 } 351 352 err = drm_plane_create_alpha_property(plane); 353 if (err) 354 DRM_ERROR("failed to create property: alpha\n"); 355 356 if (blend_modes) { 357 err = drm_plane_create_blend_mode_property(plane, blend_modes); 358 if (err) 359 DRM_ERROR("failed to create property: blend_mode\n"); 360 } 361 362 drm_plane_helper_add(plane, &mtk_plane_helper_funcs); 363 364 return 0; 365 } 366