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_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_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_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_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_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_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_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 } 351