/*
   * Copyright (C) 2013 Red Hat
   * Author: Rob Clark <robdclark@gmail.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 "msm_drv.h"
  #include "mdp4_kms.h"

  void mdp4_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask)

  {

  	mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_ENABLE, irqmask);

  }

  static void mdp4_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)

  {
  	DRM_ERROR("errors: %08x
  ", irqstatus);
  }
  
  void mdp4_irq_preinstall(struct msm_kms *kms)
  {

  	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));

  	mdp4_enable(mdp4_kms);

  	mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, 0xffffffff);

  	mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000);
  	mdp4_disable(mdp4_kms);

  }
  
  int mdp4_irq_postinstall(struct msm_kms *kms)
  {

  	struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  	struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms);
  	struct mdp_irq *error_handler = &mdp4_kms->error_handler;

  
  	error_handler->irq = mdp4_irq_error_handler;
  	error_handler->irqmask = MDP4_IRQ_PRIMARY_INTF_UDERRUN |
  			MDP4_IRQ_EXTERNAL_INTF_UDERRUN;

  	mdp_irq_register(mdp_kms, error_handler);

  
  	return 0;
  }
  
  void mdp4_irq_uninstall(struct msm_kms *kms)
  {

  	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));

  	mdp4_enable(mdp4_kms);

  	mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000);

  	mdp4_disable(mdp4_kms);

  }
  
  irqreturn_t mdp4_irq(struct msm_kms *kms)
  {

  	struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  	struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms);

  	struct drm_device *dev = mdp4_kms->dev;
  	struct msm_drm_private *priv = dev->dev_private;

  	unsigned int id;
  	uint32_t status;
  
  	status = mdp4_read(mdp4_kms, REG_MDP4_INTR_STATUS);
  	mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, status);
  
  	VERB("status=%08x", status);

  	mdp_dispatch_irqs(mdp_kms, status);

  	for (id = 0; id < priv->num_crtcs; id++)
  		if (status & mdp4_crtc_vblank(priv->crtcs[id]))
  			drm_handle_vblank(dev, id);

  	return IRQ_HANDLED;
  }
  
  int mdp4_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
  {

  	mdp_update_vblank_mask(to_mdp_kms(kms),
  			mdp4_crtc_vblank(crtc), true);

  	return 0;
  }
  
  void mdp4_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
  {

  	mdp_update_vblank_mask(to_mdp_kms(kms),
  			mdp4_crtc_vblank(crtc), false);

  }