X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fexynos%2Fexynos_drm_crtc.c;fp=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fexynos%2Fexynos_drm_crtc.c;h=9006b947e03c0a431141144c7ed21ae88b14f02b;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git diff --git a/kernel/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/kernel/drivers/gpu/drm/exynos/exynos_drm_crtc.c new file mode 100644 index 000000000..9006b947e --- /dev/null +++ b/kernel/drivers/gpu/drm/exynos/exynos_drm_crtc.c @@ -0,0 +1,376 @@ +/* exynos_drm_crtc.c + * + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * Authors: + * Inki Dae + * Joonyoung Shim + * Seung-Woo Kim + * + * 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 +#include + +#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, + (exynos_crtc->event == NULL), HZ/20)) + exynos_crtc->event = NULL; + 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_crtc *exynos_crtc = to_exynos_crtc(crtc); + struct drm_framebuffer *old_fb = crtc->primary->fb; + unsigned int crtc_w, crtc_h; + int ret; + + /* 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; + } + + if (!event) + return -EINVAL; + + spin_lock_irq(&dev->event_lock); + if (exynos_crtc->event) { + ret = -EBUSY; + goto out; + } + + ret = drm_vblank_get(dev, exynos_crtc->pipe); + if (ret) { + DRM_DEBUG("failed to acquire vblank counter\n"); + goto out; + } + + exynos_crtc->event = event; + spin_unlock_irq(&dev->event_lock); + + /* + * the pipe from user always is 0 so we can set pipe number + * of current owner to event. + */ + event->pipe = exynos_crtc->pipe; + + 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); + exynos_crtc->event = NULL; + drm_vblank_put(dev, exynos_crtc->pipe); + spin_unlock_irq(&dev->event_lock); + return ret; + } + + return 0; + +out: + spin_unlock_irq(&dev->event_lock); + 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, + struct drm_plane *plane, + int pipe, + enum exynos_drm_output_type type, + const struct exynos_drm_crtc_ops *ops, + void *ctx) +{ + struct exynos_drm_crtc *exynos_crtc; + 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); + + exynos_crtc->dpms = DRM_MODE_DPMS_OFF; + exynos_crtc->pipe = pipe; + exynos_crtc->type = type; + exynos_crtc->ops = ops; + exynos_crtc->ctx = ctx; + + 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); + 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_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); + if (exynos_crtc->event) { + + drm_send_vblank_event(dev, -1, exynos_crtc->event); + drm_vblank_put(dev, pipe); + wake_up(&exynos_crtc->pending_flip_queue); + + } + + exynos_crtc->event = NULL; + 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); +}