| /* |
| * drivers/staging/omapdrm/omap_crtc.c |
| * |
| * Copyright (C) 2011 Texas Instruments |
| * Author: Rob Clark <rob@ti.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published by |
| * the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "omap_drv.h" |
| |
| #include "drm_mode.h" |
| #include "drm_crtc.h" |
| #include "drm_crtc_helper.h" |
| |
| #define to_omap_crtc(x) container_of(x, struct omap_crtc, base) |
| |
| struct omap_crtc { |
| struct drm_crtc base; |
| struct drm_plane *plane; |
| const char *name; |
| int id; |
| |
| /* if there is a pending flip, these will be non-null: */ |
| struct drm_pending_vblank_event *event; |
| struct drm_framebuffer *old_fb; |
| }; |
| |
| static void omap_crtc_destroy(struct drm_crtc *crtc) |
| { |
| struct omap_crtc *omap_crtc = to_omap_crtc(crtc); |
| omap_crtc->plane->funcs->destroy(omap_crtc->plane); |
| drm_crtc_cleanup(crtc); |
| kfree(omap_crtc); |
| } |
| |
| static void omap_crtc_dpms(struct drm_crtc *crtc, int mode) |
| { |
| struct omap_drm_private *priv = crtc->dev->dev_private; |
| struct omap_crtc *omap_crtc = to_omap_crtc(crtc); |
| int i; |
| |
| WARN_ON(omap_plane_dpms(omap_crtc->plane, mode)); |
| |
| for (i = 0; i < priv->num_planes; i++) { |
| struct drm_plane *plane = priv->planes[i]; |
| if (plane->crtc == crtc) |
| WARN_ON(omap_plane_dpms(plane, mode)); |
| } |
| } |
| |
| static bool omap_crtc_mode_fixup(struct drm_crtc *crtc, |
| struct drm_display_mode *mode, |
| struct drm_display_mode *adjusted_mode) |
| { |
| return true; |
| } |
| |
| static int omap_crtc_mode_set(struct drm_crtc *crtc, |
| struct drm_display_mode *mode, |
| struct drm_display_mode *adjusted_mode, |
| int x, int y, |
| struct drm_framebuffer *old_fb) |
| { |
| struct omap_crtc *omap_crtc = to_omap_crtc(crtc); |
| struct drm_plane *plane = omap_crtc->plane; |
| |
| return omap_plane_mode_set(plane, crtc, crtc->fb, |
| 0, 0, mode->hdisplay, mode->vdisplay, |
| x << 16, y << 16, |
| mode->hdisplay << 16, mode->vdisplay << 16); |
| } |
| |
| static void omap_crtc_prepare(struct drm_crtc *crtc) |
| { |
| struct omap_crtc *omap_crtc = to_omap_crtc(crtc); |
| DBG("%s", omap_crtc->name); |
| omap_crtc_dpms(crtc, DRM_MODE_DPMS_OFF); |
| } |
| |
| static void omap_crtc_commit(struct drm_crtc *crtc) |
| { |
| struct omap_crtc *omap_crtc = to_omap_crtc(crtc); |
| DBG("%s", omap_crtc->name); |
| omap_crtc_dpms(crtc, DRM_MODE_DPMS_ON); |
| } |
| |
| static int omap_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, |
| struct drm_framebuffer *old_fb) |
| { |
| struct omap_crtc *omap_crtc = to_omap_crtc(crtc); |
| struct drm_plane *plane = omap_crtc->plane; |
| struct drm_display_mode *mode = &crtc->mode; |
| |
| return plane->funcs->update_plane(plane, crtc, crtc->fb, |
| 0, 0, mode->hdisplay, mode->vdisplay, |
| x << 16, y << 16, |
| mode->hdisplay << 16, mode->vdisplay << 16); |
| } |
| |
| static void omap_crtc_load_lut(struct drm_crtc *crtc) |
| { |
| } |
| |
| static void vblank_cb(void *arg) |
| { |
| static uint32_t sequence = 0; |
| struct drm_crtc *crtc = arg; |
| struct drm_device *dev = crtc->dev; |
| struct omap_crtc *omap_crtc = to_omap_crtc(crtc); |
| struct drm_pending_vblank_event *event = omap_crtc->event; |
| unsigned long flags; |
| struct timeval now; |
| |
| WARN_ON(!event); |
| |
| omap_crtc->event = NULL; |
| |
| /* wakeup userspace */ |
| if (event) { |
| do_gettimeofday(&now); |
| |
| spin_lock_irqsave(&dev->event_lock, flags); |
| /* TODO: we can't yet use the vblank time accounting, |
| * because omapdss lower layer is the one that knows |
| * the irq # and registers the handler, which more or |
| * less defeats how drm_irq works.. for now just fake |
| * the sequence number and use gettimeofday.. |
| * |
| event->event.sequence = drm_vblank_count_and_time( |
| dev, omap_crtc->id, &now); |
| */ |
| event->event.sequence = sequence++; |
| event->event.tv_sec = now.tv_sec; |
| event->event.tv_usec = now.tv_usec; |
| list_add_tail(&event->base.link, |
| &event->base.file_priv->event_list); |
| wake_up_interruptible(&event->base.file_priv->event_wait); |
| spin_unlock_irqrestore(&dev->event_lock, flags); |
| } |
| } |
| |
| static void page_flip_cb(void *arg) |
| { |
| struct drm_crtc *crtc = arg; |
| struct omap_crtc *omap_crtc = to_omap_crtc(crtc); |
| struct drm_framebuffer *old_fb = omap_crtc->old_fb; |
| |
| omap_crtc->old_fb = NULL; |
| |
| omap_crtc_mode_set_base(crtc, crtc->x, crtc->y, old_fb); |
| |
| /* really we'd like to setup the callback atomically w/ setting the |
| * new scanout buffer to avoid getting stuck waiting an extra vblank |
| * cycle.. for now go for correctness and later figure out speed.. |
| */ |
| omap_plane_on_endwin(omap_crtc->plane, vblank_cb, crtc); |
| } |
| |
| static int omap_crtc_page_flip_locked(struct drm_crtc *crtc, |
| struct drm_framebuffer *fb, |
| struct drm_pending_vblank_event *event) |
| { |
| struct drm_device *dev = crtc->dev; |
| struct omap_crtc *omap_crtc = to_omap_crtc(crtc); |
| |
| DBG("%d -> %d", crtc->fb ? crtc->fb->base.id : -1, fb->base.id); |
| |
| if (omap_crtc->event) { |
| dev_err(dev->dev, "already a pending flip\n"); |
| return -EINVAL; |
| } |
| |
| omap_crtc->old_fb = crtc->fb; |
| omap_crtc->event = event; |
| crtc->fb = fb; |
| |
| omap_gem_op_async(omap_framebuffer_bo(fb, 0), OMAP_GEM_READ, |
| page_flip_cb, crtc); |
| |
| return 0; |
| } |
| |
| static const struct drm_crtc_funcs omap_crtc_funcs = { |
| .set_config = drm_crtc_helper_set_config, |
| .destroy = omap_crtc_destroy, |
| .page_flip = omap_crtc_page_flip_locked, |
| }; |
| |
| static const struct drm_crtc_helper_funcs omap_crtc_helper_funcs = { |
| .dpms = omap_crtc_dpms, |
| .mode_fixup = omap_crtc_mode_fixup, |
| .mode_set = omap_crtc_mode_set, |
| .prepare = omap_crtc_prepare, |
| .commit = omap_crtc_commit, |
| .mode_set_base = omap_crtc_mode_set_base, |
| .load_lut = omap_crtc_load_lut, |
| }; |
| |
| /* initialize crtc */ |
| struct drm_crtc *omap_crtc_init(struct drm_device *dev, |
| struct omap_overlay *ovl, int id) |
| { |
| struct drm_crtc *crtc = NULL; |
| struct omap_crtc *omap_crtc = kzalloc(sizeof(*omap_crtc), GFP_KERNEL); |
| |
| DBG("%s", ovl->name); |
| |
| if (!omap_crtc) { |
| dev_err(dev->dev, "could not allocate CRTC\n"); |
| goto fail; |
| } |
| |
| crtc = &omap_crtc->base; |
| |
| omap_crtc->plane = omap_plane_init(dev, ovl, (1 << id), true); |
| omap_crtc->plane->crtc = crtc; |
| omap_crtc->name = ovl->name; |
| omap_crtc->id = id; |
| |
| drm_crtc_init(dev, crtc, &omap_crtc_funcs); |
| drm_crtc_helper_add(crtc, &omap_crtc_helper_funcs); |
| |
| return crtc; |
| |
| fail: |
| if (crtc) { |
| omap_crtc_destroy(crtc); |
| } |
| return NULL; |
| } |