1/* exynos_drm_crtc.c 2 * 3 * Copyright (c) 2011 Samsung Electronics Co., Ltd. 4 * Authors: 5 * Inki Dae <inki.dae@samsung.com> 6 * Joonyoung Shim <jy0922.shim@samsung.com> 7 * Seung-Woo Kim <sw0312.kim@samsung.com> 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 */ 14 15#include <drm/drmP.h> 16#include <drm/drm_crtc_helper.h> 17 18#include "exynos_drm_crtc.h" 19#include "exynos_drm_drv.h" 20#include "exynos_drm_encoder.h" 21#include "exynos_drm_plane.h" 22 23static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode) 24{ 25 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 26 27 DRM_DEBUG_KMS("crtc[%d] mode[%d]\n", crtc->base.id, mode); 28 29 if (exynos_crtc->dpms == mode) { 30 DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n"); 31 return; 32 } 33 34 if (mode > DRM_MODE_DPMS_ON) { 35 /* wait for the completion of page flip. */ 36 if (!wait_event_timeout(exynos_crtc->pending_flip_queue, 37 (exynos_crtc->event == NULL), HZ/20)) 38 exynos_crtc->event = NULL; 39 drm_crtc_vblank_off(crtc); 40 } 41 42 if (exynos_crtc->ops->dpms) 43 exynos_crtc->ops->dpms(exynos_crtc, mode); 44 45 exynos_crtc->dpms = mode; 46 47 if (mode == DRM_MODE_DPMS_ON) 48 drm_crtc_vblank_on(crtc); 49} 50 51static void exynos_drm_crtc_prepare(struct drm_crtc *crtc) 52{ 53 /* drm framework doesn't check NULL. */ 54} 55 56static void exynos_drm_crtc_commit(struct drm_crtc *crtc) 57{ 58 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 59 struct exynos_drm_plane *exynos_plane = to_exynos_plane(crtc->primary); 60 61 exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON); 62 63 if (exynos_crtc->ops->win_commit) 64 exynos_crtc->ops->win_commit(exynos_crtc, exynos_plane->zpos); 65 66 if (exynos_crtc->ops->commit) 67 exynos_crtc->ops->commit(exynos_crtc); 68} 69 70static bool 71exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc, 72 const struct drm_display_mode *mode, 73 struct drm_display_mode *adjusted_mode) 74{ 75 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 76 77 if (exynos_crtc->ops->mode_fixup) 78 return exynos_crtc->ops->mode_fixup(exynos_crtc, mode, 79 adjusted_mode); 80 81 return true; 82} 83 84static int 85exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode, 86 struct drm_display_mode *adjusted_mode, int x, int y, 87 struct drm_framebuffer *old_fb) 88{ 89 struct drm_framebuffer *fb = crtc->primary->fb; 90 unsigned int crtc_w; 91 unsigned int crtc_h; 92 int ret; 93 94 /* 95 * copy the mode data adjusted by mode_fixup() into crtc->mode 96 * so that hardware can be seet to proper mode. 97 */ 98 memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode)); 99 100 ret = exynos_check_plane(crtc->primary, fb); 101 if (ret < 0) 102 return ret; 103 104 crtc_w = fb->width - x; 105 crtc_h = fb->height - y; 106 exynos_plane_mode_set(crtc->primary, crtc, fb, 0, 0, 107 crtc_w, crtc_h, x, y, crtc_w, crtc_h); 108 109 return 0; 110} 111 112static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, 113 struct drm_framebuffer *old_fb) 114{ 115 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 116 struct drm_framebuffer *fb = crtc->primary->fb; 117 unsigned int crtc_w; 118 unsigned int crtc_h; 119 120 /* when framebuffer changing is requested, crtc's dpms should be on */ 121 if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) { 122 DRM_ERROR("failed framebuffer changing request.\n"); 123 return -EPERM; 124 } 125 126 crtc_w = fb->width - x; 127 crtc_h = fb->height - y; 128 129 return exynos_update_plane(crtc->primary, crtc, fb, 0, 0, 130 crtc_w, crtc_h, x, y, crtc_w, crtc_h); 131} 132 133static void exynos_drm_crtc_disable(struct drm_crtc *crtc) 134{ 135 struct drm_plane *plane; 136 int ret; 137 138 exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF); 139 140 drm_for_each_legacy_plane(plane, &crtc->dev->mode_config.plane_list) { 141 if (plane->crtc != crtc) 142 continue; 143 144 ret = plane->funcs->disable_plane(plane); 145 if (ret) 146 DRM_ERROR("Failed to disable plane %d\n", ret); 147 } 148} 149 150static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { 151 .dpms = exynos_drm_crtc_dpms, 152 .prepare = exynos_drm_crtc_prepare, 153 .commit = exynos_drm_crtc_commit, 154 .mode_fixup = exynos_drm_crtc_mode_fixup, 155 .mode_set = exynos_drm_crtc_mode_set, 156 .mode_set_base = exynos_drm_crtc_mode_set_base, 157 .disable = exynos_drm_crtc_disable, 158}; 159 160static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc, 161 struct drm_framebuffer *fb, 162 struct drm_pending_vblank_event *event, 163 uint32_t page_flip_flags) 164{ 165 struct drm_device *dev = crtc->dev; 166 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 167 struct drm_framebuffer *old_fb = crtc->primary->fb; 168 unsigned int crtc_w, crtc_h; 169 int ret; 170 171 /* when the page flip is requested, crtc's dpms should be on */ 172 if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) { 173 DRM_ERROR("failed page flip request.\n"); 174 return -EINVAL; 175 } 176 177 if (!event) 178 return -EINVAL; 179 180 spin_lock_irq(&dev->event_lock); 181 if (exynos_crtc->event) { 182 ret = -EBUSY; 183 goto out; 184 } 185 186 ret = drm_vblank_get(dev, exynos_crtc->pipe); 187 if (ret) { 188 DRM_DEBUG("failed to acquire vblank counter\n"); 189 goto out; 190 } 191 192 exynos_crtc->event = event; 193 spin_unlock_irq(&dev->event_lock); 194 195 /* 196 * the pipe from user always is 0 so we can set pipe number 197 * of current owner to event. 198 */ 199 event->pipe = exynos_crtc->pipe; 200 201 crtc->primary->fb = fb; 202 crtc_w = fb->width - crtc->x; 203 crtc_h = fb->height - crtc->y; 204 ret = exynos_update_plane(crtc->primary, crtc, fb, 0, 0, 205 crtc_w, crtc_h, crtc->x, crtc->y, 206 crtc_w, crtc_h); 207 if (ret) { 208 crtc->primary->fb = old_fb; 209 spin_lock_irq(&dev->event_lock); 210 exynos_crtc->event = NULL; 211 drm_vblank_put(dev, exynos_crtc->pipe); 212 spin_unlock_irq(&dev->event_lock); 213 return ret; 214 } 215 216 return 0; 217 218out: 219 spin_unlock_irq(&dev->event_lock); 220 return ret; 221} 222 223static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) 224{ 225 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 226 struct exynos_drm_private *private = crtc->dev->dev_private; 227 228 private->crtc[exynos_crtc->pipe] = NULL; 229 230 drm_crtc_cleanup(crtc); 231 kfree(exynos_crtc); 232} 233 234static struct drm_crtc_funcs exynos_crtc_funcs = { 235 .set_config = drm_crtc_helper_set_config, 236 .page_flip = exynos_drm_crtc_page_flip, 237 .destroy = exynos_drm_crtc_destroy, 238}; 239 240struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev, 241 struct drm_plane *plane, 242 int pipe, 243 enum exynos_drm_output_type type, 244 const struct exynos_drm_crtc_ops *ops, 245 void *ctx) 246{ 247 struct exynos_drm_crtc *exynos_crtc; 248 struct exynos_drm_private *private = drm_dev->dev_private; 249 struct drm_crtc *crtc; 250 int ret; 251 252 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); 253 if (!exynos_crtc) 254 return ERR_PTR(-ENOMEM); 255 256 init_waitqueue_head(&exynos_crtc->pending_flip_queue); 257 258 exynos_crtc->dpms = DRM_MODE_DPMS_OFF; 259 exynos_crtc->pipe = pipe; 260 exynos_crtc->type = type; 261 exynos_crtc->ops = ops; 262 exynos_crtc->ctx = ctx; 263 264 crtc = &exynos_crtc->base; 265 266 private->crtc[pipe] = crtc; 267 268 ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL, 269 &exynos_crtc_funcs); 270 if (ret < 0) 271 goto err_crtc; 272 273 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); 274 275 return exynos_crtc; 276 277err_crtc: 278 plane->funcs->destroy(plane); 279 kfree(exynos_crtc); 280 return ERR_PTR(ret); 281} 282 283int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int pipe) 284{ 285 struct exynos_drm_private *private = dev->dev_private; 286 struct exynos_drm_crtc *exynos_crtc = 287 to_exynos_crtc(private->crtc[pipe]); 288 289 if (exynos_crtc->dpms != DRM_MODE_DPMS_ON) 290 return -EPERM; 291 292 if (exynos_crtc->ops->enable_vblank) 293 exynos_crtc->ops->enable_vblank(exynos_crtc); 294 295 return 0; 296} 297 298void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe) 299{ 300 struct exynos_drm_private *private = dev->dev_private; 301 struct exynos_drm_crtc *exynos_crtc = 302 to_exynos_crtc(private->crtc[pipe]); 303 304 if (exynos_crtc->dpms != DRM_MODE_DPMS_ON) 305 return; 306 307 if (exynos_crtc->ops->disable_vblank) 308 exynos_crtc->ops->disable_vblank(exynos_crtc); 309} 310 311void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int pipe) 312{ 313 struct exynos_drm_private *dev_priv = dev->dev_private; 314 struct drm_crtc *drm_crtc = dev_priv->crtc[pipe]; 315 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc); 316 unsigned long flags; 317 318 spin_lock_irqsave(&dev->event_lock, flags); 319 if (exynos_crtc->event) { 320 321 drm_send_vblank_event(dev, -1, exynos_crtc->event); 322 drm_vblank_put(dev, pipe); 323 wake_up(&exynos_crtc->pending_flip_queue); 324 325 } 326 327 exynos_crtc->event = NULL; 328 spin_unlock_irqrestore(&dev->event_lock, flags); 329} 330 331void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb) 332{ 333 struct exynos_drm_crtc *exynos_crtc; 334 struct drm_device *dev = fb->dev; 335 struct drm_crtc *crtc; 336 337 /* 338 * make sure that overlay data are updated to real hardware 339 * for all encoders. 340 */ 341 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 342 exynos_crtc = to_exynos_crtc(crtc); 343 344 /* 345 * wait for vblank interrupt 346 * - this makes sure that overlay data are updated to 347 * real hardware. 348 */ 349 if (exynos_crtc->ops->wait_for_vblank) 350 exynos_crtc->ops->wait_for_vblank(exynos_crtc); 351 } 352} 353 354int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev, 355 unsigned int out_type) 356{ 357 struct drm_crtc *crtc; 358 359 list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { 360 struct exynos_drm_crtc *exynos_crtc; 361 362 exynos_crtc = to_exynos_crtc(crtc); 363 if (exynos_crtc->type == out_type) 364 return exynos_crtc->pipe; 365 } 366 367 return -EPERM; 368} 369 370void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) 371{ 372 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); 373 374 if (exynos_crtc->ops->te_handler) 375 exynos_crtc->ops->te_handler(exynos_crtc); 376} 377