3 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
5 * Inki Dae <inki.dae@samsung.com>
6 * Joonyoung Shim <jy0922.shim@samsung.com>
7 * Seung-Woo Kim <sw0312.kim@samsung.com>
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.
16 #include <drm/drm_crtc_helper.h>
18 #include "exynos_drm_drv.h"
19 #include "exynos_drm_encoder.h"
20 #include "exynos_drm_plane.h"
22 #define to_exynos_crtc(x) container_of(x, struct exynos_drm_crtc,\
25 enum exynos_crtc_mode {
26 CRTC_MODE_NORMAL, /* normal mode */
27 CRTC_MODE_BLANK, /* The private plane of crtc is blank */
31 * Exynos specific crtc structure.
33 * @drm_crtc: crtc object.
34 * @drm_plane: pointer of private plane object for this crtc
35 * @pipe: a crtc index created at load() with a new crtc object creation
36 * and the crtc object would be set to private->crtc array
37 * to get a crtc object corresponding to this pipe from private->crtc
38 * array when irq interrupt occured. the reason of using this pipe is that
39 * drm framework doesn't support multiple irq yet.
40 * we can refer to the crtc to current hardware interrupt occured through
42 * @dpms: store the crtc dpms value
43 * @mode: store the crtc mode value
45 struct exynos_drm_crtc {
46 struct drm_crtc drm_crtc;
47 struct drm_plane *plane;
50 enum exynos_crtc_mode mode;
51 wait_queue_head_t pending_flip_queue;
52 atomic_t pending_flip;
55 static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
57 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
59 DRM_DEBUG_KMS("crtc[%d] mode[%d]\n", crtc->base.id, mode);
61 if (exynos_crtc->dpms == mode) {
62 DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n");
66 if (mode > DRM_MODE_DPMS_ON) {
67 /* wait for the completion of page flip. */
68 wait_event(exynos_crtc->pending_flip_queue,
69 atomic_read(&exynos_crtc->pending_flip) == 0);
70 drm_vblank_off(crtc->dev, exynos_crtc->pipe);
73 exynos_drm_fn_encoder(crtc, &mode, exynos_drm_encoder_crtc_dpms);
74 exynos_crtc->dpms = mode;
77 static void exynos_drm_crtc_prepare(struct drm_crtc *crtc)
79 DRM_DEBUG_KMS("%s\n", __FILE__);
81 /* drm framework doesn't check NULL. */
84 static void exynos_drm_crtc_commit(struct drm_crtc *crtc)
86 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
88 DRM_DEBUG_KMS("%s\n", __FILE__);
90 exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
91 exynos_plane_commit(exynos_crtc->plane);
92 exynos_plane_dpms(exynos_crtc->plane, DRM_MODE_DPMS_ON);
96 exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc,
97 const struct drm_display_mode *mode,
98 struct drm_display_mode *adjusted_mode)
100 DRM_DEBUG_KMS("%s\n", __FILE__);
102 /* drm framework doesn't check NULL */
107 exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
108 struct drm_display_mode *adjusted_mode, int x, int y,
109 struct drm_framebuffer *old_fb)
111 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
112 struct drm_plane *plane = exynos_crtc->plane;
115 int pipe = exynos_crtc->pipe;
118 DRM_DEBUG_KMS("%s\n", __FILE__);
121 * copy the mode data adjusted by mode_fixup() into crtc->mode
122 * so that hardware can be seet to proper mode.
124 memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));
126 crtc_w = crtc->fb->width - x;
127 crtc_h = crtc->fb->height - y;
129 ret = exynos_plane_mode_set(plane, crtc, crtc->fb, 0, 0, crtc_w, crtc_h,
130 x, y, crtc_w, crtc_h);
135 plane->fb = crtc->fb;
137 exynos_drm_fn_encoder(crtc, &pipe, exynos_drm_encoder_crtc_pipe);
142 static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
143 struct drm_framebuffer *old_fb)
145 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
146 struct drm_plane *plane = exynos_crtc->plane;
151 DRM_DEBUG_KMS("%s\n", __FILE__);
153 /* when framebuffer changing is requested, crtc's dpms should be on */
154 if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
155 DRM_ERROR("failed framebuffer changing request.\n");
159 crtc_w = crtc->fb->width - x;
160 crtc_h = crtc->fb->height - y;
162 ret = exynos_plane_mode_set(plane, crtc, crtc->fb, 0, 0, crtc_w, crtc_h,
163 x, y, crtc_w, crtc_h);
167 exynos_drm_crtc_commit(crtc);
172 static void exynos_drm_crtc_load_lut(struct drm_crtc *crtc)
174 DRM_DEBUG_KMS("%s\n", __FILE__);
175 /* drm framework doesn't check NULL */
178 static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
180 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
182 DRM_DEBUG_KMS("%s\n", __FILE__);
184 exynos_plane_dpms(exynos_crtc->plane, DRM_MODE_DPMS_OFF);
185 exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
188 static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
189 .dpms = exynos_drm_crtc_dpms,
190 .prepare = exynos_drm_crtc_prepare,
191 .commit = exynos_drm_crtc_commit,
192 .mode_fixup = exynos_drm_crtc_mode_fixup,
193 .mode_set = exynos_drm_crtc_mode_set,
194 .mode_set_base = exynos_drm_crtc_mode_set_base,
195 .load_lut = exynos_drm_crtc_load_lut,
196 .disable = exynos_drm_crtc_disable,
199 static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
200 struct drm_framebuffer *fb,
201 struct drm_pending_vblank_event *event)
203 struct drm_device *dev = crtc->dev;
204 struct exynos_drm_private *dev_priv = dev->dev_private;
205 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
206 struct drm_framebuffer *old_fb = crtc->fb;
209 DRM_DEBUG_KMS("%s\n", __FILE__);
211 /* when the page flip is requested, crtc's dpms should be on */
212 if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
213 DRM_ERROR("failed page flip request.\n");
217 mutex_lock(&dev->struct_mutex);
221 * the pipe from user always is 0 so we can set pipe number
222 * of current owner to event.
224 event->pipe = exynos_crtc->pipe;
226 ret = drm_vblank_get(dev, exynos_crtc->pipe);
228 DRM_DEBUG("failed to acquire vblank counter\n");
233 spin_lock_irq(&dev->event_lock);
234 list_add_tail(&event->base.link,
235 &dev_priv->pageflip_event_list);
236 atomic_set(&exynos_crtc->pending_flip, 1);
237 spin_unlock_irq(&dev->event_lock);
240 ret = exynos_drm_crtc_mode_set_base(crtc, crtc->x, crtc->y,
245 spin_lock_irq(&dev->event_lock);
246 drm_vblank_put(dev, exynos_crtc->pipe);
247 list_del(&event->base.link);
248 spin_unlock_irq(&dev->event_lock);
254 mutex_unlock(&dev->struct_mutex);
258 static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
260 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
261 struct exynos_drm_private *private = crtc->dev->dev_private;
263 DRM_DEBUG_KMS("%s\n", __FILE__);
265 private->crtc[exynos_crtc->pipe] = NULL;
267 drm_crtc_cleanup(crtc);
271 static int exynos_drm_crtc_set_property(struct drm_crtc *crtc,
272 struct drm_property *property,
275 struct drm_device *dev = crtc->dev;
276 struct exynos_drm_private *dev_priv = dev->dev_private;
277 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
279 DRM_DEBUG_KMS("%s\n", __func__);
281 if (property == dev_priv->crtc_mode_property) {
282 enum exynos_crtc_mode mode = val;
284 if (mode == exynos_crtc->mode)
287 exynos_crtc->mode = mode;
290 case CRTC_MODE_NORMAL:
291 exynos_drm_crtc_commit(crtc);
293 case CRTC_MODE_BLANK:
294 exynos_plane_dpms(exynos_crtc->plane,
307 static struct drm_crtc_funcs exynos_crtc_funcs = {
308 .set_config = drm_crtc_helper_set_config,
309 .page_flip = exynos_drm_crtc_page_flip,
310 .destroy = exynos_drm_crtc_destroy,
311 .set_property = exynos_drm_crtc_set_property,
314 static const struct drm_prop_enum_list mode_names[] = {
315 { CRTC_MODE_NORMAL, "normal" },
316 { CRTC_MODE_BLANK, "blank" },
319 static void exynos_drm_crtc_attach_mode_property(struct drm_crtc *crtc)
321 struct drm_device *dev = crtc->dev;
322 struct exynos_drm_private *dev_priv = dev->dev_private;
323 struct drm_property *prop;
325 DRM_DEBUG_KMS("%s\n", __func__);
327 prop = dev_priv->crtc_mode_property;
329 prop = drm_property_create_enum(dev, 0, "mode", mode_names,
330 ARRAY_SIZE(mode_names));
334 dev_priv->crtc_mode_property = prop;
337 drm_object_attach_property(&crtc->base, prop, 0);
340 int exynos_drm_crtc_create(struct drm_device *dev, unsigned int nr)
342 struct exynos_drm_crtc *exynos_crtc;
343 struct exynos_drm_private *private = dev->dev_private;
344 struct drm_crtc *crtc;
346 DRM_DEBUG_KMS("%s\n", __FILE__);
348 exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
350 DRM_ERROR("failed to allocate exynos crtc\n");
354 exynos_crtc->pipe = nr;
355 exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
356 init_waitqueue_head(&exynos_crtc->pending_flip_queue);
357 atomic_set(&exynos_crtc->pending_flip, 0);
358 exynos_crtc->plane = exynos_plane_init(dev, 1 << nr, true);
359 if (!exynos_crtc->plane) {
364 crtc = &exynos_crtc->drm_crtc;
366 private->crtc[nr] = crtc;
368 drm_crtc_init(dev, crtc, &exynos_crtc_funcs);
369 drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
371 exynos_drm_crtc_attach_mode_property(crtc);
376 int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int crtc)
378 struct exynos_drm_private *private = dev->dev_private;
379 struct exynos_drm_crtc *exynos_crtc =
380 to_exynos_crtc(private->crtc[crtc]);
382 DRM_DEBUG_KMS("%s\n", __FILE__);
384 if (exynos_crtc->dpms != DRM_MODE_DPMS_ON)
387 exynos_drm_fn_encoder(private->crtc[crtc], &crtc,
388 exynos_drm_enable_vblank);
393 void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int crtc)
395 struct exynos_drm_private *private = dev->dev_private;
396 struct exynos_drm_crtc *exynos_crtc =
397 to_exynos_crtc(private->crtc[crtc]);
399 DRM_DEBUG_KMS("%s\n", __FILE__);
401 if (exynos_crtc->dpms != DRM_MODE_DPMS_ON)
404 exynos_drm_fn_encoder(private->crtc[crtc], &crtc,
405 exynos_drm_disable_vblank);
408 void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int crtc)
410 struct exynos_drm_private *dev_priv = dev->dev_private;
411 struct drm_pending_vblank_event *e, *t;
412 struct drm_crtc *drm_crtc = dev_priv->crtc[crtc];
413 struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc);
416 DRM_DEBUG_KMS("%s\n", __FILE__);
418 spin_lock_irqsave(&dev->event_lock, flags);
420 list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list,
422 /* if event's pipe isn't same as crtc then ignore it. */
426 list_del(&e->base.link);
427 drm_send_vblank_event(dev, -1, e);
428 drm_vblank_put(dev, crtc);
429 atomic_set(&exynos_crtc->pending_flip, 0);
430 wake_up(&exynos_crtc->pending_flip_queue);
433 spin_unlock_irqrestore(&dev->event_lock, flags);