2 * drivers/staging/omapdrm/omap_crtc.c
4 * Copyright (C) 2011 Texas Instruments
5 * Author: Rob Clark <rob@ti.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
22 #include <drm/drm_mode.h>
24 #include "drm_crtc_helper.h"
26 #define to_omap_crtc(x) container_of(x, struct omap_crtc, base)
30 struct drm_plane *plane;
34 /* if there is a pending flip, these will be non-null: */
35 struct drm_pending_vblank_event *event;
36 struct drm_framebuffer *old_fb;
39 static void omap_crtc_destroy(struct drm_crtc *crtc)
41 struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
42 omap_crtc->plane->funcs->destroy(omap_crtc->plane);
43 drm_crtc_cleanup(crtc);
47 static void omap_crtc_dpms(struct drm_crtc *crtc, int mode)
49 struct omap_drm_private *priv = crtc->dev->dev_private;
50 struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
53 WARN_ON(omap_plane_dpms(omap_crtc->plane, mode));
55 for (i = 0; i < priv->num_planes; i++) {
56 struct drm_plane *plane = priv->planes[i];
57 if (plane->crtc == crtc)
58 WARN_ON(omap_plane_dpms(plane, mode));
62 static bool omap_crtc_mode_fixup(struct drm_crtc *crtc,
63 const struct drm_display_mode *mode,
64 struct drm_display_mode *adjusted_mode)
69 static int omap_crtc_mode_set(struct drm_crtc *crtc,
70 struct drm_display_mode *mode,
71 struct drm_display_mode *adjusted_mode,
73 struct drm_framebuffer *old_fb)
75 struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
76 struct drm_plane *plane = omap_crtc->plane;
78 return omap_plane_mode_set(plane, crtc, crtc->fb,
79 0, 0, mode->hdisplay, mode->vdisplay,
81 mode->hdisplay << 16, mode->vdisplay << 16);
84 static void omap_crtc_prepare(struct drm_crtc *crtc)
86 struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
87 DBG("%s", omap_crtc->name);
88 omap_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
91 static void omap_crtc_commit(struct drm_crtc *crtc)
93 struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
94 DBG("%s", omap_crtc->name);
95 omap_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
98 static int omap_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
99 struct drm_framebuffer *old_fb)
101 struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
102 struct drm_plane *plane = omap_crtc->plane;
103 struct drm_display_mode *mode = &crtc->mode;
105 return plane->funcs->update_plane(plane, crtc, crtc->fb,
106 0, 0, mode->hdisplay, mode->vdisplay,
108 mode->hdisplay << 16, mode->vdisplay << 16);
111 static void omap_crtc_load_lut(struct drm_crtc *crtc)
115 static void vblank_cb(void *arg)
117 static uint32_t sequence;
118 struct drm_crtc *crtc = arg;
119 struct drm_device *dev = crtc->dev;
120 struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
121 struct drm_pending_vblank_event *event = omap_crtc->event;
127 omap_crtc->event = NULL;
129 /* wakeup userspace */
131 do_gettimeofday(&now);
133 spin_lock_irqsave(&dev->event_lock, flags);
134 /* TODO: we can't yet use the vblank time accounting,
135 * because omapdss lower layer is the one that knows
136 * the irq # and registers the handler, which more or
137 * less defeats how drm_irq works.. for now just fake
138 * the sequence number and use gettimeofday..
140 event->event.sequence = drm_vblank_count_and_time(
141 dev, omap_crtc->id, &now);
143 event->event.sequence = sequence++;
144 event->event.tv_sec = now.tv_sec;
145 event->event.tv_usec = now.tv_usec;
146 list_add_tail(&event->base.link,
147 &event->base.file_priv->event_list);
148 wake_up_interruptible(&event->base.file_priv->event_wait);
149 spin_unlock_irqrestore(&dev->event_lock, flags);
153 static void page_flip_cb(void *arg)
155 struct drm_crtc *crtc = arg;
156 struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
157 struct drm_framebuffer *old_fb = omap_crtc->old_fb;
158 struct drm_gem_object *bo;
160 omap_crtc->old_fb = NULL;
162 omap_crtc_mode_set_base(crtc, crtc->x, crtc->y, old_fb);
164 /* really we'd like to setup the callback atomically w/ setting the
165 * new scanout buffer to avoid getting stuck waiting an extra vblank
166 * cycle.. for now go for correctness and later figure out speed..
168 omap_plane_on_endwin(omap_crtc->plane, vblank_cb, crtc);
170 bo = omap_framebuffer_bo(crtc->fb, 0);
171 drm_gem_object_unreference_unlocked(bo);
174 static int omap_crtc_page_flip_locked(struct drm_crtc *crtc,
175 struct drm_framebuffer *fb,
176 struct drm_pending_vblank_event *event)
178 struct drm_device *dev = crtc->dev;
179 struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
180 struct drm_gem_object *bo;
182 DBG("%d -> %d", crtc->fb ? crtc->fb->base.id : -1, fb->base.id);
184 if (omap_crtc->event) {
185 dev_err(dev->dev, "already a pending flip\n");
189 omap_crtc->old_fb = crtc->fb;
190 omap_crtc->event = event;
194 * Hold a reference temporarily until the crtc is updated
195 * and takes the reference to the bo. This avoids it
196 * getting freed from under us:
198 bo = omap_framebuffer_bo(fb, 0);
199 drm_gem_object_reference(bo);
201 omap_gem_op_async(bo, OMAP_GEM_READ, page_flip_cb, crtc);
206 static int omap_crtc_set_property(struct drm_crtc *crtc,
207 struct drm_property *property, uint64_t val)
209 struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
210 struct omap_drm_private *priv = crtc->dev->dev_private;
212 if (property == priv->rotation_prop) {
213 crtc->invert_dimensions =
214 !!(val & ((1LL << DRM_ROTATE_90) | (1LL << DRM_ROTATE_270)));
217 return omap_plane_set_property(omap_crtc->plane, property, val);
220 static const struct drm_crtc_funcs omap_crtc_funcs = {
221 .set_config = drm_crtc_helper_set_config,
222 .destroy = omap_crtc_destroy,
223 .page_flip = omap_crtc_page_flip_locked,
224 .set_property = omap_crtc_set_property,
227 static const struct drm_crtc_helper_funcs omap_crtc_helper_funcs = {
228 .dpms = omap_crtc_dpms,
229 .mode_fixup = omap_crtc_mode_fixup,
230 .mode_set = omap_crtc_mode_set,
231 .prepare = omap_crtc_prepare,
232 .commit = omap_crtc_commit,
233 .mode_set_base = omap_crtc_mode_set_base,
234 .load_lut = omap_crtc_load_lut,
237 /* initialize crtc */
238 struct drm_crtc *omap_crtc_init(struct drm_device *dev,
239 struct omap_overlay *ovl, int id)
241 struct drm_crtc *crtc = NULL;
242 struct omap_crtc *omap_crtc = kzalloc(sizeof(*omap_crtc), GFP_KERNEL);
244 DBG("%s", ovl->name);
247 dev_err(dev->dev, "could not allocate CRTC\n");
251 crtc = &omap_crtc->base;
253 omap_crtc->plane = omap_plane_init(dev, ovl, (1 << id), true);
254 omap_crtc->plane->crtc = crtc;
255 omap_crtc->name = ovl->name;
258 drm_crtc_init(dev, crtc, &omap_crtc_funcs);
259 drm_crtc_helper_add(crtc, &omap_crtc_helper_funcs);
261 omap_plane_install_properties(omap_crtc->plane, &crtc->base);
267 omap_crtc_destroy(crtc);