drivers/gpu/drm/msm/mdp/mdp4/mdp4_irq.c

   1 /*
   2  * Copyright (C) 2013 Red Hat
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18
  19 #include "msm_drv.h"
  20 #include "mdp4_kms.h"
  21
  22 void mdp4_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask)
  23 {
  24         mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_ENABLE, irqmask);
  25 }
  26
  27 static void mdp4_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
  28 {
  29         DRM_ERROR("errors: %08x\n", irqstatus);
  30 }
  31
  32 void mdp4_irq_preinstall(struct msm_kms *kms)
  33 {
  34         struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
  35         mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, 0xffffffff);
  36 }
  37
  38 int mdp4_irq_postinstall(struct msm_kms *kms)
  39 {
  40         struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  41         struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms);
  42         struct mdp_irq *error_handler = &mdp4_kms->error_handler;
  43
  44         error_handler->irq = mdp4_irq_error_handler;
  45         error_handler->irqmask = MDP4_IRQ_PRIMARY_INTF_UDERRUN |
  46                         MDP4_IRQ_EXTERNAL_INTF_UDERRUN;
  47
  48         mdp_irq_register(mdp_kms, error_handler);
  49
  50         return 0;
  51 }
  52
  53 void mdp4_irq_uninstall(struct msm_kms *kms)
  54 {
  55         struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
  56         mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000);
  57 }
  58
  59 irqreturn_t mdp4_irq(struct msm_kms *kms)
  60 {
  61         struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  62         struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms);
  63         struct drm_device *dev = mdp4_kms->dev;
  64         struct msm_drm_private *priv = dev->dev_private;
  65         unsigned int id;
  66         uint32_t status;
  67
  68         status = mdp4_read(mdp4_kms, REG_MDP4_INTR_STATUS);
  69         mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, status);
  70
  71         VERB("status=%08x", status);
  72
  73         mdp_dispatch_irqs(mdp_kms, status);
  74
  75         for (id = 0; id < priv->num_crtcs; id++)
  76                 if (status & mdp4_crtc_vblank(priv->crtcs[id]))
  77                         drm_handle_vblank(dev, id);
  78
  79         return IRQ_HANDLED;
  80 }
  81
  82 int mdp4_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
  83 {
  84         mdp_update_vblank_mask(to_mdp_kms(kms),
  85                         mdp4_crtc_vblank(crtc), true);
  86         return 0;
  87 }
  88
  89 void mdp4_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
  90 {
  91         mdp_update_vblank_mask(to_mdp_kms(kms),
  92                         mdp4_crtc_vblank(crtc), false);
  93 }