1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) STMicroelectronics SA 2014 4 * Authors: Vincent Abriou <vincent.abriou@st.com> 5 * Fabien Dessenne <fabien.dessenne@st.com> 6 * for STMicroelectronics. 7 */ 8 9 #include <linux/seq_file.h> 10 11 #include <drm/drm_atomic.h> 12 #include <drm/drm_fb_cma_helper.h> 13 #include <drm/drm_gem_cma_helper.h> 14 15 #include "sti_compositor.h" 16 #include "sti_cursor.h" 17 #include "sti_plane.h" 18 #include "sti_vtg.h" 19 20 /* Registers */ 21 #define CUR_CTL 0x00 22 #define CUR_VPO 0x0C 23 #define CUR_PML 0x14 24 #define CUR_PMP 0x18 25 #define CUR_SIZE 0x1C 26 #define CUR_CML 0x20 27 #define CUR_AWS 0x28 28 #define CUR_AWE 0x2C 29 30 #define CUR_CTL_CLUT_UPDATE BIT(1) 31 32 #define STI_CURS_MIN_SIZE 1 33 #define STI_CURS_MAX_SIZE 128 34 35 /* 36 * pixmap dma buffer structure 37 * 38 * @paddr: physical address 39 * @size: buffer size 40 * @base: virtual address 41 */ 42 struct dma_pixmap { 43 dma_addr_t paddr; 44 size_t size; 45 void *base; 46 }; 47 48 /** 49 * STI Cursor structure 50 * 51 * @sti_plane: sti_plane structure 52 * @dev: driver device 53 * @regs: cursor registers 54 * @width: cursor width 55 * @height: cursor height 56 * @clut: color look up table 57 * @clut_paddr: color look up table physical address 58 * @pixmap: pixmap dma buffer (clut8-format cursor) 59 */ 60 struct sti_cursor { 61 struct sti_plane plane; 62 struct device *dev; 63 void __iomem *regs; 64 unsigned int width; 65 unsigned int height; 66 unsigned short *clut; 67 dma_addr_t clut_paddr; 68 struct dma_pixmap pixmap; 69 }; 70 71 static const uint32_t cursor_supported_formats[] = { 72 DRM_FORMAT_ARGB8888, 73 }; 74 75 #define to_sti_cursor(x) container_of(x, struct sti_cursor, plane) 76 77 #define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \ 78 readl(cursor->regs + reg)) 79 80 static void cursor_dbg_vpo(struct seq_file *s, u32 val) 81 { 82 seq_printf(s, "\txdo:%4d\tydo:%4d", val & 0x0FFF, (val >> 16) & 0x0FFF); 83 } 84 85 static void cursor_dbg_size(struct seq_file *s, u32 val) 86 { 87 seq_printf(s, "\t%d x %d", val & 0x07FF, (val >> 16) & 0x07FF); 88 } 89 90 static void cursor_dbg_pml(struct seq_file *s, 91 struct sti_cursor *cursor, u32 val) 92 { 93 if (cursor->pixmap.paddr == val) 94 seq_printf(s, "\tVirt @: %p", cursor->pixmap.base); 95 } 96 97 static void cursor_dbg_cml(struct seq_file *s, 98 struct sti_cursor *cursor, u32 val) 99 { 100 if (cursor->clut_paddr == val) 101 seq_printf(s, "\tVirt @: %p", cursor->clut); 102 } 103 104 static int cursor_dbg_show(struct seq_file *s, void *data) 105 { 106 struct drm_info_node *node = s->private; 107 struct sti_cursor *cursor = (struct sti_cursor *)node->info_ent->data; 108 109 seq_printf(s, "%s: (vaddr = 0x%p)", 110 sti_plane_to_str(&cursor->plane), cursor->regs); 111 112 DBGFS_DUMP(CUR_CTL); 113 DBGFS_DUMP(CUR_VPO); 114 cursor_dbg_vpo(s, readl(cursor->regs + CUR_VPO)); 115 DBGFS_DUMP(CUR_PML); 116 cursor_dbg_pml(s, cursor, readl(cursor->regs + CUR_PML)); 117 DBGFS_DUMP(CUR_PMP); 118 DBGFS_DUMP(CUR_SIZE); 119 cursor_dbg_size(s, readl(cursor->regs + CUR_SIZE)); 120 DBGFS_DUMP(CUR_CML); 121 cursor_dbg_cml(s, cursor, readl(cursor->regs + CUR_CML)); 122 DBGFS_DUMP(CUR_AWS); 123 DBGFS_DUMP(CUR_AWE); 124 seq_putc(s, '\n'); 125 return 0; 126 } 127 128 static struct drm_info_list cursor_debugfs_files[] = { 129 { "cursor", cursor_dbg_show, 0, NULL }, 130 }; 131 132 static int cursor_debugfs_init(struct sti_cursor *cursor, 133 struct drm_minor *minor) 134 { 135 unsigned int i; 136 137 for (i = 0; i < ARRAY_SIZE(cursor_debugfs_files); i++) 138 cursor_debugfs_files[i].data = cursor; 139 140 return drm_debugfs_create_files(cursor_debugfs_files, 141 ARRAY_SIZE(cursor_debugfs_files), 142 minor->debugfs_root, minor); 143 } 144 145 static void sti_cursor_argb8888_to_clut8(struct sti_cursor *cursor, u32 *src) 146 { 147 u8 *dst = cursor->pixmap.base; 148 unsigned int i, j; 149 u32 a, r, g, b; 150 151 for (i = 0; i < cursor->height; i++) { 152 for (j = 0; j < cursor->width; j++) { 153 /* Pick the 2 higher bits of each component */ 154 a = (*src >> 30) & 3; 155 r = (*src >> 22) & 3; 156 g = (*src >> 14) & 3; 157 b = (*src >> 6) & 3; 158 *dst = a << 6 | r << 4 | g << 2 | b; 159 src++; 160 dst++; 161 } 162 } 163 } 164 165 static void sti_cursor_init(struct sti_cursor *cursor) 166 { 167 unsigned short *base = cursor->clut; 168 unsigned int a, r, g, b; 169 170 /* Assign CLUT values, ARGB444 format */ 171 for (a = 0; a < 4; a++) 172 for (r = 0; r < 4; r++) 173 for (g = 0; g < 4; g++) 174 for (b = 0; b < 4; b++) 175 *base++ = (a * 5) << 12 | 176 (r * 5) << 8 | 177 (g * 5) << 4 | 178 (b * 5); 179 } 180 181 static int sti_cursor_atomic_check(struct drm_plane *drm_plane, 182 struct drm_plane_state *state) 183 { 184 struct sti_plane *plane = to_sti_plane(drm_plane); 185 struct sti_cursor *cursor = to_sti_cursor(plane); 186 struct drm_crtc *crtc = state->crtc; 187 struct drm_framebuffer *fb = state->fb; 188 struct drm_crtc_state *crtc_state; 189 struct drm_display_mode *mode; 190 int dst_x, dst_y, dst_w, dst_h; 191 int src_w, src_h; 192 193 /* no need for further checks if the plane is being disabled */ 194 if (!crtc || !fb) 195 return 0; 196 197 crtc_state = drm_atomic_get_crtc_state(state->state, crtc); 198 mode = &crtc_state->mode; 199 dst_x = state->crtc_x; 200 dst_y = state->crtc_y; 201 dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x); 202 dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y); 203 /* src_x are in 16.16 format */ 204 src_w = state->src_w >> 16; 205 src_h = state->src_h >> 16; 206 207 if (src_w < STI_CURS_MIN_SIZE || 208 src_h < STI_CURS_MIN_SIZE || 209 src_w > STI_CURS_MAX_SIZE || 210 src_h > STI_CURS_MAX_SIZE) { 211 DRM_ERROR("Invalid cursor size (%dx%d)\n", 212 src_w, src_h); 213 return -EINVAL; 214 } 215 216 /* If the cursor size has changed, re-allocated the pixmap */ 217 if (!cursor->pixmap.base || 218 (cursor->width != src_w) || 219 (cursor->height != src_h)) { 220 cursor->width = src_w; 221 cursor->height = src_h; 222 223 if (cursor->pixmap.base) 224 dma_free_wc(cursor->dev, cursor->pixmap.size, 225 cursor->pixmap.base, cursor->pixmap.paddr); 226 227 cursor->pixmap.size = cursor->width * cursor->height; 228 229 cursor->pixmap.base = dma_alloc_wc(cursor->dev, 230 cursor->pixmap.size, 231 &cursor->pixmap.paddr, 232 GFP_KERNEL | GFP_DMA); 233 if (!cursor->pixmap.base) { 234 DRM_ERROR("Failed to allocate memory for pixmap\n"); 235 return -EINVAL; 236 } 237 } 238 239 if (!drm_fb_cma_get_gem_obj(fb, 0)) { 240 DRM_ERROR("Can't get CMA GEM object for fb\n"); 241 return -EINVAL; 242 } 243 244 DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n", 245 crtc->base.id, sti_mixer_to_str(to_sti_mixer(crtc)), 246 drm_plane->base.id, sti_plane_to_str(plane)); 247 DRM_DEBUG_KMS("(%dx%d)@(%d,%d)\n", dst_w, dst_h, dst_x, dst_y); 248 249 return 0; 250 } 251 252 static void sti_cursor_atomic_update(struct drm_plane *drm_plane, 253 struct drm_plane_state *oldstate) 254 { 255 struct drm_plane_state *state = drm_plane->state; 256 struct sti_plane *plane = to_sti_plane(drm_plane); 257 struct sti_cursor *cursor = to_sti_cursor(plane); 258 struct drm_crtc *crtc = state->crtc; 259 struct drm_framebuffer *fb = state->fb; 260 struct drm_display_mode *mode; 261 int dst_x, dst_y; 262 struct drm_gem_cma_object *cma_obj; 263 u32 y, x; 264 u32 val; 265 266 if (!crtc || !fb) 267 return; 268 269 mode = &crtc->mode; 270 dst_x = state->crtc_x; 271 dst_y = state->crtc_y; 272 273 cma_obj = drm_fb_cma_get_gem_obj(fb, 0); 274 275 /* Convert ARGB8888 to CLUT8 */ 276 sti_cursor_argb8888_to_clut8(cursor, (u32 *)cma_obj->vaddr); 277 278 /* AWS and AWE depend on the mode */ 279 y = sti_vtg_get_line_number(*mode, 0); 280 x = sti_vtg_get_pixel_number(*mode, 0); 281 val = y << 16 | x; 282 writel(val, cursor->regs + CUR_AWS); 283 y = sti_vtg_get_line_number(*mode, mode->vdisplay - 1); 284 x = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1); 285 val = y << 16 | x; 286 writel(val, cursor->regs + CUR_AWE); 287 288 /* Set memory location, size, and position */ 289 writel(cursor->pixmap.paddr, cursor->regs + CUR_PML); 290 writel(cursor->width, cursor->regs + CUR_PMP); 291 writel(cursor->height << 16 | cursor->width, cursor->regs + CUR_SIZE); 292 293 y = sti_vtg_get_line_number(*mode, dst_y); 294 x = sti_vtg_get_pixel_number(*mode, dst_x); 295 writel((y << 16) | x, cursor->regs + CUR_VPO); 296 297 /* Set and fetch CLUT */ 298 writel(cursor->clut_paddr, cursor->regs + CUR_CML); 299 writel(CUR_CTL_CLUT_UPDATE, cursor->regs + CUR_CTL); 300 301 sti_plane_update_fps(plane, true, false); 302 303 plane->status = STI_PLANE_UPDATED; 304 } 305 306 static void sti_cursor_atomic_disable(struct drm_plane *drm_plane, 307 struct drm_plane_state *oldstate) 308 { 309 struct sti_plane *plane = to_sti_plane(drm_plane); 310 311 if (!oldstate->crtc) { 312 DRM_DEBUG_DRIVER("drm plane:%d not enabled\n", 313 drm_plane->base.id); 314 return; 315 } 316 317 DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n", 318 oldstate->crtc->base.id, 319 sti_mixer_to_str(to_sti_mixer(oldstate->crtc)), 320 drm_plane->base.id, sti_plane_to_str(plane)); 321 322 plane->status = STI_PLANE_DISABLING; 323 } 324 325 static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = { 326 .atomic_check = sti_cursor_atomic_check, 327 .atomic_update = sti_cursor_atomic_update, 328 .atomic_disable = sti_cursor_atomic_disable, 329 }; 330 331 static void sti_cursor_destroy(struct drm_plane *drm_plane) 332 { 333 DRM_DEBUG_DRIVER("\n"); 334 335 drm_plane_cleanup(drm_plane); 336 } 337 338 static int sti_cursor_late_register(struct drm_plane *drm_plane) 339 { 340 struct sti_plane *plane = to_sti_plane(drm_plane); 341 struct sti_cursor *cursor = to_sti_cursor(plane); 342 343 return cursor_debugfs_init(cursor, drm_plane->dev->primary); 344 } 345 346 static const struct drm_plane_funcs sti_cursor_plane_helpers_funcs = { 347 .update_plane = drm_atomic_helper_update_plane, 348 .disable_plane = drm_atomic_helper_disable_plane, 349 .destroy = sti_cursor_destroy, 350 .reset = sti_plane_reset, 351 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, 352 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, 353 .late_register = sti_cursor_late_register, 354 }; 355 356 struct drm_plane *sti_cursor_create(struct drm_device *drm_dev, 357 struct device *dev, int desc, 358 void __iomem *baseaddr, 359 unsigned int possible_crtcs) 360 { 361 struct sti_cursor *cursor; 362 size_t size; 363 int res; 364 365 cursor = devm_kzalloc(dev, sizeof(*cursor), GFP_KERNEL); 366 if (!cursor) { 367 DRM_ERROR("Failed to allocate memory for cursor\n"); 368 return NULL; 369 } 370 371 /* Allocate clut buffer */ 372 size = 0x100 * sizeof(unsigned short); 373 cursor->clut = dma_alloc_wc(dev, size, &cursor->clut_paddr, 374 GFP_KERNEL | GFP_DMA); 375 376 if (!cursor->clut) { 377 DRM_ERROR("Failed to allocate memory for cursor clut\n"); 378 goto err_clut; 379 } 380 381 cursor->dev = dev; 382 cursor->regs = baseaddr; 383 cursor->plane.desc = desc; 384 cursor->plane.status = STI_PLANE_DISABLED; 385 386 sti_cursor_init(cursor); 387 388 res = drm_universal_plane_init(drm_dev, &cursor->plane.drm_plane, 389 possible_crtcs, 390 &sti_cursor_plane_helpers_funcs, 391 cursor_supported_formats, 392 ARRAY_SIZE(cursor_supported_formats), 393 NULL, DRM_PLANE_TYPE_CURSOR, NULL); 394 if (res) { 395 DRM_ERROR("Failed to initialize universal plane\n"); 396 goto err_plane; 397 } 398 399 drm_plane_helper_add(&cursor->plane.drm_plane, 400 &sti_cursor_helpers_funcs); 401 402 sti_plane_init_property(&cursor->plane, DRM_PLANE_TYPE_CURSOR); 403 404 return &cursor->plane.drm_plane; 405 406 err_plane: 407 dma_free_wc(dev, size, cursor->clut, cursor->clut_paddr); 408 err_clut: 409 devm_kfree(dev, cursor); 410 return NULL; 411 } 412