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/dma-mapping.h> 10 #include <linux/seq_file.h> 11 12 #include <drm/drm_atomic.h> 13 #include <drm/drm_device.h> 14 #include <drm/drm_fb_cma_helper.h> 15 #include <drm/drm_gem_cma_helper.h> 16 17 #include "sti_compositor.h" 18 #include "sti_cursor.h" 19 #include "sti_plane.h" 20 #include "sti_vtg.h" 21 22 /* Registers */ 23 #define CUR_CTL 0x00 24 #define CUR_VPO 0x0C 25 #define CUR_PML 0x14 26 #define CUR_PMP 0x18 27 #define CUR_SIZE 0x1C 28 #define CUR_CML 0x20 29 #define CUR_AWS 0x28 30 #define CUR_AWE 0x2C 31 32 #define CUR_CTL_CLUT_UPDATE BIT(1) 33 34 #define STI_CURS_MIN_SIZE 1 35 #define STI_CURS_MAX_SIZE 128 36 37 /* 38 * pixmap dma buffer structure 39 * 40 * @paddr: physical address 41 * @size: buffer size 42 * @base: virtual address 43 */ 44 struct dma_pixmap { 45 dma_addr_t paddr; 46 size_t size; 47 void *base; 48 }; 49 50 /* 51 * STI Cursor structure 52 * 53 * @sti_plane: sti_plane structure 54 * @dev: driver device 55 * @regs: cursor registers 56 * @width: cursor width 57 * @height: cursor height 58 * @clut: color look up table 59 * @clut_paddr: color look up table physical address 60 * @pixmap: pixmap dma buffer (clut8-format cursor) 61 */ 62 struct sti_cursor { 63 struct sti_plane plane; 64 struct device *dev; 65 void __iomem *regs; 66 unsigned int width; 67 unsigned int height; 68 unsigned short *clut; 69 dma_addr_t clut_paddr; 70 struct dma_pixmap pixmap; 71 }; 72 73 static const uint32_t cursor_supported_formats[] = { 74 DRM_FORMAT_ARGB8888, 75 }; 76 77 #define to_sti_cursor(x) container_of(x, struct sti_cursor, plane) 78 79 #define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \ 80 readl(cursor->regs + reg)) 81 82 static void cursor_dbg_vpo(struct seq_file *s, u32 val) 83 { 84 seq_printf(s, "\txdo:%4d\tydo:%4d", val & 0x0FFF, (val >> 16) & 0x0FFF); 85 } 86 87 static void cursor_dbg_size(struct seq_file *s, u32 val) 88 { 89 seq_printf(s, "\t%d x %d", val & 0x07FF, (val >> 16) & 0x07FF); 90 } 91 92 static void cursor_dbg_pml(struct seq_file *s, 93 struct sti_cursor *cursor, u32 val) 94 { 95 if (cursor->pixmap.paddr == val) 96 seq_printf(s, "\tVirt @: %p", cursor->pixmap.base); 97 } 98 99 static void cursor_dbg_cml(struct seq_file *s, 100 struct sti_cursor *cursor, u32 val) 101 { 102 if (cursor->clut_paddr == val) 103 seq_printf(s, "\tVirt @: %p", cursor->clut); 104 } 105 106 static int cursor_dbg_show(struct seq_file *s, void *data) 107 { 108 struct drm_info_node *node = s->private; 109 struct sti_cursor *cursor = (struct sti_cursor *)node->info_ent->data; 110 111 seq_printf(s, "%s: (vaddr = 0x%p)", 112 sti_plane_to_str(&cursor->plane), cursor->regs); 113 114 DBGFS_DUMP(CUR_CTL); 115 DBGFS_DUMP(CUR_VPO); 116 cursor_dbg_vpo(s, readl(cursor->regs + CUR_VPO)); 117 DBGFS_DUMP(CUR_PML); 118 cursor_dbg_pml(s, cursor, readl(cursor->regs + CUR_PML)); 119 DBGFS_DUMP(CUR_PMP); 120 DBGFS_DUMP(CUR_SIZE); 121 cursor_dbg_size(s, readl(cursor->regs + CUR_SIZE)); 122 DBGFS_DUMP(CUR_CML); 123 cursor_dbg_cml(s, cursor, readl(cursor->regs + CUR_CML)); 124 DBGFS_DUMP(CUR_AWS); 125 DBGFS_DUMP(CUR_AWE); 126 seq_putc(s, '\n'); 127 return 0; 128 } 129 130 static struct drm_info_list cursor_debugfs_files[] = { 131 { "cursor", cursor_dbg_show, 0, NULL }, 132 }; 133 134 static void cursor_debugfs_init(struct sti_cursor *cursor, 135 struct drm_minor *minor) 136 { 137 unsigned int i; 138 139 for (i = 0; i < ARRAY_SIZE(cursor_debugfs_files); i++) 140 cursor_debugfs_files[i].data = cursor; 141 142 drm_debugfs_create_files(cursor_debugfs_files, 143 ARRAY_SIZE(cursor_debugfs_files), 144 minor->debugfs_root, minor); 145 } 146 147 static void sti_cursor_argb8888_to_clut8(struct sti_cursor *cursor, u32 *src) 148 { 149 u8 *dst = cursor->pixmap.base; 150 unsigned int i, j; 151 u32 a, r, g, b; 152 153 for (i = 0; i < cursor->height; i++) { 154 for (j = 0; j < cursor->width; j++) { 155 /* Pick the 2 higher bits of each component */ 156 a = (*src >> 30) & 3; 157 r = (*src >> 22) & 3; 158 g = (*src >> 14) & 3; 159 b = (*src >> 6) & 3; 160 *dst = a << 6 | r << 4 | g << 2 | b; 161 src++; 162 dst++; 163 } 164 } 165 } 166 167 static void sti_cursor_init(struct sti_cursor *cursor) 168 { 169 unsigned short *base = cursor->clut; 170 unsigned int a, r, g, b; 171 172 /* Assign CLUT values, ARGB444 format */ 173 for (a = 0; a < 4; a++) 174 for (r = 0; r < 4; r++) 175 for (g = 0; g < 4; g++) 176 for (b = 0; b < 4; b++) 177 *base++ = (a * 5) << 12 | 178 (r * 5) << 8 | 179 (g * 5) << 4 | 180 (b * 5); 181 } 182 183 static int sti_cursor_atomic_check(struct drm_plane *drm_plane, 184 struct drm_atomic_state *state) 185 { 186 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, 187 drm_plane); 188 struct sti_plane *plane = to_sti_plane(drm_plane); 189 struct sti_cursor *cursor = to_sti_cursor(plane); 190 struct drm_crtc *crtc = new_plane_state->crtc; 191 struct drm_framebuffer *fb = new_plane_state->fb; 192 struct drm_crtc_state *crtc_state; 193 struct drm_display_mode *mode; 194 int dst_x, dst_y, dst_w, dst_h; 195 int src_w, src_h; 196 197 /* no need for further checks if the plane is being disabled */ 198 if (!crtc || !fb) 199 return 0; 200 201 crtc_state = drm_atomic_get_crtc_state(state, crtc); 202 mode = &crtc_state->mode; 203 dst_x = new_plane_state->crtc_x; 204 dst_y = new_plane_state->crtc_y; 205 dst_w = clamp_val(new_plane_state->crtc_w, 0, 206 mode->crtc_hdisplay - dst_x); 207 dst_h = clamp_val(new_plane_state->crtc_h, 0, 208 mode->crtc_vdisplay - dst_y); 209 /* src_x are in 16.16 format */ 210 src_w = new_plane_state->src_w >> 16; 211 src_h = new_plane_state->src_h >> 16; 212 213 if (src_w < STI_CURS_MIN_SIZE || 214 src_h < STI_CURS_MIN_SIZE || 215 src_w > STI_CURS_MAX_SIZE || 216 src_h > STI_CURS_MAX_SIZE) { 217 DRM_ERROR("Invalid cursor size (%dx%d)\n", 218 src_w, src_h); 219 return -EINVAL; 220 } 221 222 /* If the cursor size has changed, re-allocated the pixmap */ 223 if (!cursor->pixmap.base || 224 (cursor->width != src_w) || 225 (cursor->height != src_h)) { 226 cursor->width = src_w; 227 cursor->height = src_h; 228 229 if (cursor->pixmap.base) 230 dma_free_wc(cursor->dev, cursor->pixmap.size, 231 cursor->pixmap.base, cursor->pixmap.paddr); 232 233 cursor->pixmap.size = cursor->width * cursor->height; 234 235 cursor->pixmap.base = dma_alloc_wc(cursor->dev, 236 cursor->pixmap.size, 237 &cursor->pixmap.paddr, 238 GFP_KERNEL | GFP_DMA); 239 if (!cursor->pixmap.base) { 240 DRM_ERROR("Failed to allocate memory for pixmap\n"); 241 return -EINVAL; 242 } 243 } 244 245 if (!drm_fb_cma_get_gem_obj(fb, 0)) { 246 DRM_ERROR("Can't get CMA GEM object for fb\n"); 247 return -EINVAL; 248 } 249 250 DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n", 251 crtc->base.id, sti_mixer_to_str(to_sti_mixer(crtc)), 252 drm_plane->base.id, sti_plane_to_str(plane)); 253 DRM_DEBUG_KMS("(%dx%d)@(%d,%d)\n", dst_w, dst_h, dst_x, dst_y); 254 255 return 0; 256 } 257 258 static void sti_cursor_atomic_update(struct drm_plane *drm_plane, 259 struct drm_atomic_state *state) 260 { 261 struct drm_plane_state *newstate = drm_atomic_get_new_plane_state(state, 262 drm_plane); 263 struct sti_plane *plane = to_sti_plane(drm_plane); 264 struct sti_cursor *cursor = to_sti_cursor(plane); 265 struct drm_crtc *crtc = newstate->crtc; 266 struct drm_framebuffer *fb = newstate->fb; 267 struct drm_display_mode *mode; 268 int dst_x, dst_y; 269 struct drm_gem_cma_object *cma_obj; 270 u32 y, x; 271 u32 val; 272 273 if (!crtc || !fb) 274 return; 275 276 mode = &crtc->mode; 277 dst_x = newstate->crtc_x; 278 dst_y = newstate->crtc_y; 279 280 cma_obj = drm_fb_cma_get_gem_obj(fb, 0); 281 282 /* Convert ARGB8888 to CLUT8 */ 283 sti_cursor_argb8888_to_clut8(cursor, (u32 *)cma_obj->vaddr); 284 285 /* AWS and AWE depend on the mode */ 286 y = sti_vtg_get_line_number(*mode, 0); 287 x = sti_vtg_get_pixel_number(*mode, 0); 288 val = y << 16 | x; 289 writel(val, cursor->regs + CUR_AWS); 290 y = sti_vtg_get_line_number(*mode, mode->vdisplay - 1); 291 x = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1); 292 val = y << 16 | x; 293 writel(val, cursor->regs + CUR_AWE); 294 295 /* Set memory location, size, and position */ 296 writel(cursor->pixmap.paddr, cursor->regs + CUR_PML); 297 writel(cursor->width, cursor->regs + CUR_PMP); 298 writel(cursor->height << 16 | cursor->width, cursor->regs + CUR_SIZE); 299 300 y = sti_vtg_get_line_number(*mode, dst_y); 301 x = sti_vtg_get_pixel_number(*mode, dst_x); 302 writel((y << 16) | x, cursor->regs + CUR_VPO); 303 304 /* Set and fetch CLUT */ 305 writel(cursor->clut_paddr, cursor->regs + CUR_CML); 306 writel(CUR_CTL_CLUT_UPDATE, cursor->regs + CUR_CTL); 307 308 sti_plane_update_fps(plane, true, false); 309 310 plane->status = STI_PLANE_UPDATED; 311 } 312 313 static void sti_cursor_atomic_disable(struct drm_plane *drm_plane, 314 struct drm_atomic_state *state) 315 { 316 struct drm_plane_state *oldstate = drm_atomic_get_old_plane_state(state, 317 drm_plane); 318 struct sti_plane *plane = to_sti_plane(drm_plane); 319 320 if (!oldstate->crtc) { 321 DRM_DEBUG_DRIVER("drm plane:%d not enabled\n", 322 drm_plane->base.id); 323 return; 324 } 325 326 DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n", 327 oldstate->crtc->base.id, 328 sti_mixer_to_str(to_sti_mixer(oldstate->crtc)), 329 drm_plane->base.id, sti_plane_to_str(plane)); 330 331 plane->status = STI_PLANE_DISABLING; 332 } 333 334 static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = { 335 .atomic_check = sti_cursor_atomic_check, 336 .atomic_update = sti_cursor_atomic_update, 337 .atomic_disable = sti_cursor_atomic_disable, 338 }; 339 340 static int sti_cursor_late_register(struct drm_plane *drm_plane) 341 { 342 struct sti_plane *plane = to_sti_plane(drm_plane); 343 struct sti_cursor *cursor = to_sti_cursor(plane); 344 345 cursor_debugfs_init(cursor, drm_plane->dev->primary); 346 347 return 0; 348 } 349 350 static const struct drm_plane_funcs sti_cursor_plane_helpers_funcs = { 351 .update_plane = drm_atomic_helper_update_plane, 352 .disable_plane = drm_atomic_helper_disable_plane, 353 .destroy = drm_plane_cleanup, 354 .reset = drm_atomic_helper_plane_reset, 355 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, 356 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, 357 .late_register = sti_cursor_late_register, 358 }; 359 360 struct drm_plane *sti_cursor_create(struct drm_device *drm_dev, 361 struct device *dev, int desc, 362 void __iomem *baseaddr, 363 unsigned int possible_crtcs) 364 { 365 struct sti_cursor *cursor; 366 size_t size; 367 int res; 368 369 cursor = devm_kzalloc(dev, sizeof(*cursor), GFP_KERNEL); 370 if (!cursor) { 371 DRM_ERROR("Failed to allocate memory for cursor\n"); 372 return NULL; 373 } 374 375 /* Allocate clut buffer */ 376 size = 0x100 * sizeof(unsigned short); 377 cursor->clut = dma_alloc_wc(dev, size, &cursor->clut_paddr, 378 GFP_KERNEL | GFP_DMA); 379 380 if (!cursor->clut) { 381 DRM_ERROR("Failed to allocate memory for cursor clut\n"); 382 goto err_clut; 383 } 384 385 cursor->dev = dev; 386 cursor->regs = baseaddr; 387 cursor->plane.desc = desc; 388 cursor->plane.status = STI_PLANE_DISABLED; 389 390 sti_cursor_init(cursor); 391 392 res = drm_universal_plane_init(drm_dev, &cursor->plane.drm_plane, 393 possible_crtcs, 394 &sti_cursor_plane_helpers_funcs, 395 cursor_supported_formats, 396 ARRAY_SIZE(cursor_supported_formats), 397 NULL, DRM_PLANE_TYPE_CURSOR, NULL); 398 if (res) { 399 DRM_ERROR("Failed to initialize universal plane\n"); 400 goto err_plane; 401 } 402 403 drm_plane_helper_add(&cursor->plane.drm_plane, 404 &sti_cursor_helpers_funcs); 405 406 sti_plane_init_property(&cursor->plane, DRM_PLANE_TYPE_CURSOR); 407 408 return &cursor->plane.drm_plane; 409 410 err_plane: 411 dma_free_wc(dev, size, cursor->clut, cursor->clut_paddr); 412 err_clut: 413 devm_kfree(dev, cursor); 414 return NULL; 415 } 416