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 <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 stucture 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 struct drm_device *dev = node->minor->dev; 109 int ret; 110 111 ret = mutex_lock_interruptible(&dev->struct_mutex); 112 if (ret) 113 return ret; 114 115 seq_printf(s, "%s: (vaddr = 0x%p)", 116 sti_plane_to_str(&cursor->plane), cursor->regs); 117 118 DBGFS_DUMP(CUR_CTL); 119 DBGFS_DUMP(CUR_VPO); 120 cursor_dbg_vpo(s, readl(cursor->regs + CUR_VPO)); 121 DBGFS_DUMP(CUR_PML); 122 cursor_dbg_pml(s, cursor, readl(cursor->regs + CUR_PML)); 123 DBGFS_DUMP(CUR_PMP); 124 DBGFS_DUMP(CUR_SIZE); 125 cursor_dbg_size(s, readl(cursor->regs + CUR_SIZE)); 126 DBGFS_DUMP(CUR_CML); 127 cursor_dbg_cml(s, cursor, readl(cursor->regs + CUR_CML)); 128 DBGFS_DUMP(CUR_AWS); 129 DBGFS_DUMP(CUR_AWE); 130 seq_puts(s, "\n"); 131 132 mutex_unlock(&dev->struct_mutex); 133 return 0; 134 } 135 136 static struct drm_info_list cursor_debugfs_files[] = { 137 { "cursor", cursor_dbg_show, 0, NULL }, 138 }; 139 140 static int cursor_debugfs_init(struct sti_cursor *cursor, 141 struct drm_minor *minor) 142 { 143 unsigned int i; 144 145 for (i = 0; i < ARRAY_SIZE(cursor_debugfs_files); i++) 146 cursor_debugfs_files[i].data = cursor; 147 148 return drm_debugfs_create_files(cursor_debugfs_files, 149 ARRAY_SIZE(cursor_debugfs_files), 150 minor->debugfs_root, minor); 151 } 152 153 static void sti_cursor_argb8888_to_clut8(struct sti_cursor *cursor, u32 *src) 154 { 155 u8 *dst = cursor->pixmap.base; 156 unsigned int i, j; 157 u32 a, r, g, b; 158 159 for (i = 0; i < cursor->height; i++) { 160 for (j = 0; j < cursor->width; j++) { 161 /* Pick the 2 higher bits of each component */ 162 a = (*src >> 30) & 3; 163 r = (*src >> 22) & 3; 164 g = (*src >> 14) & 3; 165 b = (*src >> 6) & 3; 166 *dst = a << 6 | r << 4 | g << 2 | b; 167 src++; 168 dst++; 169 } 170 } 171 } 172 173 static void sti_cursor_init(struct sti_cursor *cursor) 174 { 175 unsigned short *base = cursor->clut; 176 unsigned int a, r, g, b; 177 178 /* Assign CLUT values, ARGB444 format */ 179 for (a = 0; a < 4; a++) 180 for (r = 0; r < 4; r++) 181 for (g = 0; g < 4; g++) 182 for (b = 0; b < 4; b++) 183 *base++ = (a * 5) << 12 | 184 (r * 5) << 8 | 185 (g * 5) << 4 | 186 (b * 5); 187 } 188 189 static int sti_cursor_atomic_check(struct drm_plane *drm_plane, 190 struct drm_plane_state *state) 191 { 192 struct sti_plane *plane = to_sti_plane(drm_plane); 193 struct sti_cursor *cursor = to_sti_cursor(plane); 194 struct drm_crtc *crtc = state->crtc; 195 struct drm_framebuffer *fb = state->fb; 196 struct drm_crtc_state *crtc_state; 197 struct drm_display_mode *mode; 198 int dst_x, dst_y, dst_w, dst_h; 199 int src_w, src_h; 200 201 /* no need for further checks if the plane is being disabled */ 202 if (!crtc || !fb) 203 return 0; 204 205 crtc_state = drm_atomic_get_crtc_state(state->state, crtc); 206 mode = &crtc_state->mode; 207 dst_x = state->crtc_x; 208 dst_y = state->crtc_y; 209 dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x); 210 dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y); 211 /* src_x are in 16.16 format */ 212 src_w = state->src_w >> 16; 213 src_h = state->src_h >> 16; 214 215 if (src_w < STI_CURS_MIN_SIZE || 216 src_h < STI_CURS_MIN_SIZE || 217 src_w > STI_CURS_MAX_SIZE || 218 src_h > STI_CURS_MAX_SIZE) { 219 DRM_ERROR("Invalid cursor size (%dx%d)\n", 220 src_w, src_h); 221 return -EINVAL; 222 } 223 224 /* If the cursor size has changed, re-allocated the pixmap */ 225 if (!cursor->pixmap.base || 226 (cursor->width != src_w) || 227 (cursor->height != src_h)) { 228 cursor->width = src_w; 229 cursor->height = src_h; 230 231 if (cursor->pixmap.base) 232 dma_free_wc(cursor->dev, cursor->pixmap.size, 233 cursor->pixmap.base, cursor->pixmap.paddr); 234 235 cursor->pixmap.size = cursor->width * cursor->height; 236 237 cursor->pixmap.base = dma_alloc_wc(cursor->dev, 238 cursor->pixmap.size, 239 &cursor->pixmap.paddr, 240 GFP_KERNEL | GFP_DMA); 241 if (!cursor->pixmap.base) { 242 DRM_ERROR("Failed to allocate memory for pixmap\n"); 243 return -EINVAL; 244 } 245 } 246 247 if (!drm_fb_cma_get_gem_obj(fb, 0)) { 248 DRM_ERROR("Can't get CMA GEM object for fb\n"); 249 return -EINVAL; 250 } 251 252 DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n", 253 crtc->base.id, sti_mixer_to_str(to_sti_mixer(crtc)), 254 drm_plane->base.id, sti_plane_to_str(plane)); 255 DRM_DEBUG_KMS("(%dx%d)@(%d,%d)\n", dst_w, dst_h, dst_x, dst_y); 256 257 return 0; 258 } 259 260 static void sti_cursor_atomic_update(struct drm_plane *drm_plane, 261 struct drm_plane_state *oldstate) 262 { 263 struct drm_plane_state *state = drm_plane->state; 264 struct sti_plane *plane = to_sti_plane(drm_plane); 265 struct sti_cursor *cursor = to_sti_cursor(plane); 266 struct drm_crtc *crtc = state->crtc; 267 struct drm_framebuffer *fb = state->fb; 268 struct drm_display_mode *mode; 269 int dst_x, dst_y; 270 struct drm_gem_cma_object *cma_obj; 271 u32 y, x; 272 u32 val; 273 274 if (!crtc || !fb) 275 return; 276 277 mode = &crtc->mode; 278 dst_x = state->crtc_x; 279 dst_y = state->crtc_y; 280 281 cma_obj = drm_fb_cma_get_gem_obj(fb, 0); 282 283 /* Convert ARGB8888 to CLUT8 */ 284 sti_cursor_argb8888_to_clut8(cursor, (u32 *)cma_obj->vaddr); 285 286 /* AWS and AWE depend on the mode */ 287 y = sti_vtg_get_line_number(*mode, 0); 288 x = sti_vtg_get_pixel_number(*mode, 0); 289 val = y << 16 | x; 290 writel(val, cursor->regs + CUR_AWS); 291 y = sti_vtg_get_line_number(*mode, mode->vdisplay - 1); 292 x = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1); 293 val = y << 16 | x; 294 writel(val, cursor->regs + CUR_AWE); 295 296 /* Set memory location, size, and position */ 297 writel(cursor->pixmap.paddr, cursor->regs + CUR_PML); 298 writel(cursor->width, cursor->regs + CUR_PMP); 299 writel(cursor->height << 16 | cursor->width, cursor->regs + CUR_SIZE); 300 301 y = sti_vtg_get_line_number(*mode, dst_y); 302 x = sti_vtg_get_pixel_number(*mode, dst_x); 303 writel((y << 16) | x, cursor->regs + CUR_VPO); 304 305 /* Set and fetch CLUT */ 306 writel(cursor->clut_paddr, cursor->regs + CUR_CML); 307 writel(CUR_CTL_CLUT_UPDATE, cursor->regs + CUR_CTL); 308 309 sti_plane_update_fps(plane, true, false); 310 311 plane->status = STI_PLANE_UPDATED; 312 } 313 314 static void sti_cursor_atomic_disable(struct drm_plane *drm_plane, 315 struct drm_plane_state *oldstate) 316 { 317 struct sti_plane *plane = to_sti_plane(drm_plane); 318 319 if (!drm_plane->crtc) { 320 DRM_DEBUG_DRIVER("drm plane:%d not enabled\n", 321 drm_plane->base.id); 322 return; 323 } 324 325 DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n", 326 drm_plane->crtc->base.id, 327 sti_mixer_to_str(to_sti_mixer(drm_plane->crtc)), 328 drm_plane->base.id, sti_plane_to_str(plane)); 329 330 plane->status = STI_PLANE_DISABLING; 331 } 332 333 static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = { 334 .atomic_check = sti_cursor_atomic_check, 335 .atomic_update = sti_cursor_atomic_update, 336 .atomic_disable = sti_cursor_atomic_disable, 337 }; 338 339 struct drm_plane *sti_cursor_create(struct drm_device *drm_dev, 340 struct device *dev, int desc, 341 void __iomem *baseaddr, 342 unsigned int possible_crtcs) 343 { 344 struct sti_cursor *cursor; 345 size_t size; 346 int res; 347 348 cursor = devm_kzalloc(dev, sizeof(*cursor), GFP_KERNEL); 349 if (!cursor) { 350 DRM_ERROR("Failed to allocate memory for cursor\n"); 351 return NULL; 352 } 353 354 /* Allocate clut buffer */ 355 size = 0x100 * sizeof(unsigned short); 356 cursor->clut = dma_alloc_wc(dev, size, &cursor->clut_paddr, 357 GFP_KERNEL | GFP_DMA); 358 359 if (!cursor->clut) { 360 DRM_ERROR("Failed to allocate memory for cursor clut\n"); 361 goto err_clut; 362 } 363 364 cursor->dev = dev; 365 cursor->regs = baseaddr; 366 cursor->plane.desc = desc; 367 cursor->plane.status = STI_PLANE_DISABLED; 368 369 sti_cursor_init(cursor); 370 371 res = drm_universal_plane_init(drm_dev, &cursor->plane.drm_plane, 372 possible_crtcs, 373 &sti_plane_helpers_funcs, 374 cursor_supported_formats, 375 ARRAY_SIZE(cursor_supported_formats), 376 DRM_PLANE_TYPE_CURSOR, NULL); 377 if (res) { 378 DRM_ERROR("Failed to initialize universal plane\n"); 379 goto err_plane; 380 } 381 382 drm_plane_helper_add(&cursor->plane.drm_plane, 383 &sti_cursor_helpers_funcs); 384 385 sti_plane_init_property(&cursor->plane, DRM_PLANE_TYPE_CURSOR); 386 387 if (cursor_debugfs_init(cursor, drm_dev->primary)) 388 DRM_ERROR("CURSOR debugfs setup failed\n"); 389 390 return &cursor->plane.drm_plane; 391 392 err_plane: 393 dma_free_wc(dev, size, cursor->clut, cursor->clut_paddr); 394 err_clut: 395 devm_kfree(dev, cursor); 396 return NULL; 397 } 398