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