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 int 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 return 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_plane_state *state) 185 { 186 struct sti_plane *plane = to_sti_plane(drm_plane); 187 struct sti_cursor *cursor = to_sti_cursor(plane); 188 struct drm_crtc *crtc = state->crtc; 189 struct drm_framebuffer *fb = state->fb; 190 struct drm_crtc_state *crtc_state; 191 struct drm_display_mode *mode; 192 int dst_x, dst_y, dst_w, dst_h; 193 int src_w, src_h; 194 195 /* no need for further checks if the plane is being disabled */ 196 if (!crtc || !fb) 197 return 0; 198 199 crtc_state = drm_atomic_get_crtc_state(state->state, crtc); 200 mode = &crtc_state->mode; 201 dst_x = state->crtc_x; 202 dst_y = state->crtc_y; 203 dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x); 204 dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y); 205 /* src_x are in 16.16 format */ 206 src_w = state->src_w >> 16; 207 src_h = state->src_h >> 16; 208 209 if (src_w < STI_CURS_MIN_SIZE || 210 src_h < STI_CURS_MIN_SIZE || 211 src_w > STI_CURS_MAX_SIZE || 212 src_h > STI_CURS_MAX_SIZE) { 213 DRM_ERROR("Invalid cursor size (%dx%d)\n", 214 src_w, src_h); 215 return -EINVAL; 216 } 217 218 /* If the cursor size has changed, re-allocated the pixmap */ 219 if (!cursor->pixmap.base || 220 (cursor->width != src_w) || 221 (cursor->height != src_h)) { 222 cursor->width = src_w; 223 cursor->height = src_h; 224 225 if (cursor->pixmap.base) 226 dma_free_wc(cursor->dev, cursor->pixmap.size, 227 cursor->pixmap.base, cursor->pixmap.paddr); 228 229 cursor->pixmap.size = cursor->width * cursor->height; 230 231 cursor->pixmap.base = dma_alloc_wc(cursor->dev, 232 cursor->pixmap.size, 233 &cursor->pixmap.paddr, 234 GFP_KERNEL | GFP_DMA); 235 if (!cursor->pixmap.base) { 236 DRM_ERROR("Failed to allocate memory for pixmap\n"); 237 return -EINVAL; 238 } 239 } 240 241 if (!drm_fb_cma_get_gem_obj(fb, 0)) { 242 DRM_ERROR("Can't get CMA GEM object for fb\n"); 243 return -EINVAL; 244 } 245 246 DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n", 247 crtc->base.id, sti_mixer_to_str(to_sti_mixer(crtc)), 248 drm_plane->base.id, sti_plane_to_str(plane)); 249 DRM_DEBUG_KMS("(%dx%d)@(%d,%d)\n", dst_w, dst_h, dst_x, dst_y); 250 251 return 0; 252 } 253 254 static void sti_cursor_atomic_update(struct drm_plane *drm_plane, 255 struct drm_plane_state *oldstate) 256 { 257 struct drm_plane_state *state = drm_plane->state; 258 struct sti_plane *plane = to_sti_plane(drm_plane); 259 struct sti_cursor *cursor = to_sti_cursor(plane); 260 struct drm_crtc *crtc = state->crtc; 261 struct drm_framebuffer *fb = state->fb; 262 struct drm_display_mode *mode; 263 int dst_x, dst_y; 264 struct drm_gem_cma_object *cma_obj; 265 u32 y, x; 266 u32 val; 267 268 if (!crtc || !fb) 269 return; 270 271 mode = &crtc->mode; 272 dst_x = state->crtc_x; 273 dst_y = state->crtc_y; 274 275 cma_obj = drm_fb_cma_get_gem_obj(fb, 0); 276 277 /* Convert ARGB8888 to CLUT8 */ 278 sti_cursor_argb8888_to_clut8(cursor, (u32 *)cma_obj->vaddr); 279 280 /* AWS and AWE depend on the mode */ 281 y = sti_vtg_get_line_number(*mode, 0); 282 x = sti_vtg_get_pixel_number(*mode, 0); 283 val = y << 16 | x; 284 writel(val, cursor->regs + CUR_AWS); 285 y = sti_vtg_get_line_number(*mode, mode->vdisplay - 1); 286 x = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1); 287 val = y << 16 | x; 288 writel(val, cursor->regs + CUR_AWE); 289 290 /* Set memory location, size, and position */ 291 writel(cursor->pixmap.paddr, cursor->regs + CUR_PML); 292 writel(cursor->width, cursor->regs + CUR_PMP); 293 writel(cursor->height << 16 | cursor->width, cursor->regs + CUR_SIZE); 294 295 y = sti_vtg_get_line_number(*mode, dst_y); 296 x = sti_vtg_get_pixel_number(*mode, dst_x); 297 writel((y << 16) | x, cursor->regs + CUR_VPO); 298 299 /* Set and fetch CLUT */ 300 writel(cursor->clut_paddr, cursor->regs + CUR_CML); 301 writel(CUR_CTL_CLUT_UPDATE, cursor->regs + CUR_CTL); 302 303 sti_plane_update_fps(plane, true, false); 304 305 plane->status = STI_PLANE_UPDATED; 306 } 307 308 static void sti_cursor_atomic_disable(struct drm_plane *drm_plane, 309 struct drm_plane_state *oldstate) 310 { 311 struct sti_plane *plane = to_sti_plane(drm_plane); 312 313 if (!oldstate->crtc) { 314 DRM_DEBUG_DRIVER("drm plane:%d not enabled\n", 315 drm_plane->base.id); 316 return; 317 } 318 319 DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n", 320 oldstate->crtc->base.id, 321 sti_mixer_to_str(to_sti_mixer(oldstate->crtc)), 322 drm_plane->base.id, sti_plane_to_str(plane)); 323 324 plane->status = STI_PLANE_DISABLING; 325 } 326 327 static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = { 328 .atomic_check = sti_cursor_atomic_check, 329 .atomic_update = sti_cursor_atomic_update, 330 .atomic_disable = sti_cursor_atomic_disable, 331 }; 332 333 static void sti_cursor_destroy(struct drm_plane *drm_plane) 334 { 335 DRM_DEBUG_DRIVER("\n"); 336 337 drm_plane_cleanup(drm_plane); 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 return cursor_debugfs_init(cursor, drm_plane->dev->primary); 346 } 347 348 static const struct drm_plane_funcs sti_cursor_plane_helpers_funcs = { 349 .update_plane = drm_atomic_helper_update_plane, 350 .disable_plane = drm_atomic_helper_disable_plane, 351 .destroy = sti_cursor_destroy, 352 .reset = sti_plane_reset, 353 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, 354 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, 355 .late_register = sti_cursor_late_register, 356 }; 357 358 struct drm_plane *sti_cursor_create(struct drm_device *drm_dev, 359 struct device *dev, int desc, 360 void __iomem *baseaddr, 361 unsigned int possible_crtcs) 362 { 363 struct sti_cursor *cursor; 364 size_t size; 365 int res; 366 367 cursor = devm_kzalloc(dev, sizeof(*cursor), GFP_KERNEL); 368 if (!cursor) { 369 DRM_ERROR("Failed to allocate memory for cursor\n"); 370 return NULL; 371 } 372 373 /* Allocate clut buffer */ 374 size = 0x100 * sizeof(unsigned short); 375 cursor->clut = dma_alloc_wc(dev, size, &cursor->clut_paddr, 376 GFP_KERNEL | GFP_DMA); 377 378 if (!cursor->clut) { 379 DRM_ERROR("Failed to allocate memory for cursor clut\n"); 380 goto err_clut; 381 } 382 383 cursor->dev = dev; 384 cursor->regs = baseaddr; 385 cursor->plane.desc = desc; 386 cursor->plane.status = STI_PLANE_DISABLED; 387 388 sti_cursor_init(cursor); 389 390 res = drm_universal_plane_init(drm_dev, &cursor->plane.drm_plane, 391 possible_crtcs, 392 &sti_cursor_plane_helpers_funcs, 393 cursor_supported_formats, 394 ARRAY_SIZE(cursor_supported_formats), 395 NULL, DRM_PLANE_TYPE_CURSOR, NULL); 396 if (res) { 397 DRM_ERROR("Failed to initialize universal plane\n"); 398 goto err_plane; 399 } 400 401 drm_plane_helper_add(&cursor->plane.drm_plane, 402 &sti_cursor_helpers_funcs); 403 404 sti_plane_init_property(&cursor->plane, DRM_PLANE_TYPE_CURSOR); 405 406 return &cursor->plane.drm_plane; 407 408 err_plane: 409 dma_free_wc(dev, size, cursor->clut, cursor->clut_paddr); 410 err_clut: 411 devm_kfree(dev, cursor); 412 return NULL; 413 } 414