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_enable(mdp4_kms);
  36         mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, 0xffffffff);
  37         mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000);
  38         mdp4_disable(mdp4_kms);
  39 }
  40
  41 int mdp4_irq_postinstall(struct msm_kms *kms)
  42 {
  43         struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  44         struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms);
  45         struct mdp_irq *error_handler = &mdp4_kms->error_handler;
  46
  47         error_handler->irq = mdp4_irq_error_handler;
  48         error_handler->irqmask = MDP4_IRQ_PRIMARY_INTF_UDERRUN |
  49                         MDP4_IRQ_EXTERNAL_INTF_UDERRUN;
  50
  51         mdp_irq_register(mdp_kms, error_handler);
  52
  53         return 0;
  54 }
  55
  56 void mdp4_irq_uninstall(struct msm_kms *kms)
  57 {
  58         struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
  59         mdp4_enable(mdp4_kms);
  60         mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000);
  61         mdp4_disable(mdp4_kms);
  62 }
  63
  64 irqreturn_t mdp4_irq(struct msm_kms *kms)
  65 {
  66         struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  67         struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms);
  68         struct drm_device *dev = mdp4_kms->dev;
  69         struct msm_drm_private *priv = dev->dev_private;
  70         unsigned int id;
  71         uint32_t status;
  72
  73         status = mdp4_read(mdp4_kms, REG_MDP4_INTR_STATUS);
  74         mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, status);
  75
  76         VERB("status=%08x", status);
  77
  78         mdp_dispatch_irqs(mdp_kms, status);
  79
  80         for (id = 0; id < priv->num_crtcs; id++)
  81                 if (status & mdp4_crtc_vblank(priv->crtcs[id]))
  82                         drm_handle_vblank(dev, id);
  83
  84         return IRQ_HANDLED;
  85 }
  86
  87 int mdp4_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
  88 {
  89         mdp_update_vblank_mask(to_mdp_kms(kms),
  90                         mdp4_crtc_vblank(crtc), true);
  91         return 0;
  92 }
  93
  94 void mdp4_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
  95 {
  96         mdp_update_vblank_mask(to_mdp_kms(kms),
  97                         mdp4_crtc_vblank(crtc), false);
  98 }