/* exynos_drm_crtc.c * * Copyright (c) 2011 Samsung Electronics Co., Ltd. * Authors: * Inki Dae <inki.dae@samsung.com> * Joonyoung Shim <jy0922.shim@samsung.com> * Seung-Woo Kim <sw0312.kim@samsung.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include <drm/drmP.h> #include <drm/drm_crtc_helper.h> #include "exynos_drm_crtc.h" #include "exynos_drm_drv.h" #include "exynos_drm_encoder.h" #include "exynos_drm_plane.h" static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode) { struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); DRM_DEBUG_KMS("crtc[%d] mode[%d]\n", crtc->base.id, mode); if (exynos_crtc->dpms == mode) { DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n"); return; } if (mode > DRM_MODE_DPMS_ON) { /* wait for the completion of page flip. */ if (!wait_event_timeout(exynos_crtc->pending_flip_queue, !atomic_read(&exynos_crtc->pending_flip), HZ/20)) atomic_set(&exynos_crtc->pending_flip, 0); drm_crtc_vblank_off(crtc); } if (exynos_crtc->ops->dpms) exynos_crtc->ops->dpms(exynos_crtc, mode); exynos_crtc->dpms = mode; if (mode == DRM_MODE_DPMS_ON) drm_crtc_vblank_on(crtc); } static void exynos_drm_crtc_prepare(struct drm_crtc *crtc) { /* drm framework doesn't check NULL. */ } static void exynos_drm_crtc_commit(struct drm_crtc *crtc) { struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); struct exynos_drm_plane *exynos_plane = to_exynos_plane(crtc->primary); exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON); if (exynos_crtc->ops->win_commit) exynos_crtc->ops->win_commit(exynos_crtc, exynos_plane->zpos); if (exynos_crtc->ops->commit) exynos_crtc->ops->commit(exynos_crtc); } static bool exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc, const struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); if (exynos_crtc->ops->mode_fixup) return exynos_crtc->ops->mode_fixup(exynos_crtc, mode, adjusted_mode); return true; } static int exynos_drm_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 drm_framebuffer *fb = crtc->primary->fb; unsigned int crtc_w; unsigned int crtc_h; int ret; /* * copy the mode data adjusted by mode_fixup() into crtc->mode * so that hardware can be seet to proper mode. */ memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode)); ret = exynos_check_plane(crtc->primary, fb); if (ret < 0) return ret; crtc_w = fb->width - x; crtc_h = fb->height - y; exynos_plane_mode_set(crtc->primary, crtc, fb, 0, 0, crtc_w, crtc_h, x, y, crtc_w, crtc_h); return 0; } static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, struct drm_framebuffer *old_fb) { struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); struct drm_framebuffer *fb = crtc->primary->fb; unsigned int crtc_w; unsigned int crtc_h; /* when framebuffer changing is requested, crtc's dpms should be on */ if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) { DRM_ERROR("failed framebuffer changing request.\n"); return -EPERM; } crtc_w = fb->width - x; crtc_h = fb->height - y; return exynos_update_plane(crtc->primary, crtc, fb, 0, 0, crtc_w, crtc_h, x, y, crtc_w, crtc_h); } static void exynos_drm_crtc_disable(struct drm_crtc *crtc) { struct drm_plane *plane; int ret; exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF); drm_for_each_legacy_plane(plane, &crtc->dev->mode_config.plane_list) { if (plane->crtc != crtc) continue; ret = plane->funcs->disable_plane(plane); if (ret) DRM_ERROR("Failed to disable plane %d\n", ret); } } static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { .dpms = exynos_drm_crtc_dpms, .prepare = exynos_drm_crtc_prepare, .commit = exynos_drm_crtc_commit, .mode_fixup = exynos_drm_crtc_mode_fixup, .mode_set = exynos_drm_crtc_mode_set, .mode_set_base = exynos_drm_crtc_mode_set_base, .disable = exynos_drm_crtc_disable, }; static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb, struct drm_pending_vblank_event *event, uint32_t page_flip_flags) { struct drm_device *dev = crtc->dev; struct exynos_drm_private *dev_priv = dev->dev_private; struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); struct drm_framebuffer *old_fb = crtc->primary->fb; unsigned int crtc_w, crtc_h; int ret = -EINVAL; /* when the page flip is requested, crtc's dpms should be on */ if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) { DRM_ERROR("failed page flip request.\n"); return -EINVAL; } mutex_lock(&dev->struct_mutex); if (event) { /* * the pipe from user always is 0 so we can set pipe number * of current owner to event. */ event->pipe = exynos_crtc->pipe; ret = drm_vblank_get(dev, exynos_crtc->pipe); if (ret) { DRM_DEBUG("failed to acquire vblank counter\n"); goto out; } spin_lock_irq(&dev->event_lock); list_add_tail(&event->base.link, &dev_priv->pageflip_event_list); atomic_set(&exynos_crtc->pending_flip, 1); spin_unlock_irq(&dev->event_lock); crtc->primary->fb = fb; crtc_w = fb->width - crtc->x; crtc_h = fb->height - crtc->y; ret = exynos_update_plane(crtc->primary, crtc, fb, 0, 0, crtc_w, crtc_h, crtc->x, crtc->y, crtc_w, crtc_h); if (ret) { crtc->primary->fb = old_fb; spin_lock_irq(&dev->event_lock); drm_vblank_put(dev, exynos_crtc->pipe); list_del(&event->base.link); atomic_set(&exynos_crtc->pending_flip, 0); spin_unlock_irq(&dev->event_lock); goto out; } } out: mutex_unlock(&dev->struct_mutex); return ret; } static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) { struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); struct exynos_drm_private *private = crtc->dev->dev_private; private->crtc[exynos_crtc->pipe] = NULL; drm_crtc_cleanup(crtc); kfree(exynos_crtc); } static struct drm_crtc_funcs exynos_crtc_funcs = { .set_config = drm_crtc_helper_set_config, .page_flip = exynos_drm_crtc_page_flip, .destroy = exynos_drm_crtc_destroy, }; struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev, int pipe, enum exynos_drm_output_type type, struct exynos_drm_crtc_ops *ops, void *ctx) { struct exynos_drm_crtc *exynos_crtc; struct drm_plane *plane; struct exynos_drm_private *private = drm_dev->dev_private; struct drm_crtc *crtc; int ret; exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); if (!exynos_crtc) return ERR_PTR(-ENOMEM); init_waitqueue_head(&exynos_crtc->pending_flip_queue); atomic_set(&exynos_crtc->pending_flip, 0); exynos_crtc->dpms = DRM_MODE_DPMS_OFF; exynos_crtc->pipe = pipe; exynos_crtc->type = type; exynos_crtc->ops = ops; exynos_crtc->ctx = ctx; plane = exynos_plane_init(drm_dev, 1 << pipe, DRM_PLANE_TYPE_PRIMARY); if (IS_ERR(plane)) { ret = PTR_ERR(plane); goto err_plane; } crtc = &exynos_crtc->base; private->crtc[pipe] = crtc; ret = drm_crtc_init_with_planes(drm_dev, crtc, plane, NULL, &exynos_crtc_funcs); if (ret < 0) goto err_crtc; drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); return exynos_crtc; err_crtc: plane->funcs->destroy(plane); err_plane: kfree(exynos_crtc); return ERR_PTR(ret); } int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int pipe) { struct exynos_drm_private *private = dev->dev_private; struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(private->crtc[pipe]); if (exynos_crtc->dpms != DRM_MODE_DPMS_ON) return -EPERM; if (exynos_crtc->ops->enable_vblank) exynos_crtc->ops->enable_vblank(exynos_crtc); return 0; } void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int pipe) { struct exynos_drm_private *private = dev->dev_private; struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(private->crtc[pipe]); if (exynos_crtc->dpms != DRM_MODE_DPMS_ON) return; if (exynos_crtc->ops->disable_vblank) exynos_crtc->ops->disable_vblank(exynos_crtc); } void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int pipe) { struct exynos_drm_private *dev_priv = dev->dev_private; struct drm_pending_vblank_event *e, *t; struct drm_crtc *drm_crtc = dev_priv->crtc[pipe]; struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc); unsigned long flags; spin_lock_irqsave(&dev->event_lock, flags); list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list, base.link) { /* if event's pipe isn't same as crtc then ignore it. */ if (pipe != e->pipe) continue; list_del(&e->base.link); drm_send_vblank_event(dev, -1, e); drm_vblank_put(dev, pipe); atomic_set(&exynos_crtc->pending_flip, 0); wake_up(&exynos_crtc->pending_flip_queue); } spin_unlock_irqrestore(&dev->event_lock, flags); } void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb) { struct exynos_drm_crtc *exynos_crtc; struct drm_device *dev = fb->dev; struct drm_crtc *crtc; /* * make sure that overlay data are updated to real hardware * for all encoders. */ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { exynos_crtc = to_exynos_crtc(crtc); /* * wait for vblank interrupt * - this makes sure that overlay data are updated to * real hardware. */ if (exynos_crtc->ops->wait_for_vblank) exynos_crtc->ops->wait_for_vblank(exynos_crtc); } } int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev, unsigned int out_type) { struct drm_crtc *crtc; list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) { struct exynos_drm_crtc *exynos_crtc; exynos_crtc = to_exynos_crtc(crtc); if (exynos_crtc->type == out_type) return exynos_crtc->pipe; } return -EPERM; } void exynos_drm_crtc_te_handler(struct drm_crtc *crtc) { struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); if (exynos_crtc->ops->te_handler) exynos_crtc->ops->te_handler(exynos_crtc); }