drivers/gpu/drm/msm/disp/mdp5/mdp5_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 #include <linux/irq.h>
  19
  20 #include <drm/drm_print.h>
  21
  22 #include "msm_drv.h"
  23 #include "mdp5_kms.h"
  24
  25 void mdp5_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask,
  26                 uint32_t old_irqmask)
  27 {
  28         mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_CLEAR,
  29                    irqmask ^ (irqmask & old_irqmask));
  30         mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_EN, irqmask);
  31 }
  32
  33 static void mdp5_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
  34 {
  35         struct mdp5_kms *mdp5_kms = container_of(irq, struct mdp5_kms, error_handler);
  36         static DEFINE_RATELIMIT_STATE(rs, 5*HZ, 1);
  37         extern bool dumpstate;
  38
  39         DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
  40
  41         if (dumpstate && __ratelimit(&rs)) {
  42                 struct drm_printer p = drm_info_printer(mdp5_kms->dev->dev);
  43                 drm_state_dump(mdp5_kms->dev, &p);
  44                 if (mdp5_kms->smp)
  45                         mdp5_smp_dump(mdp5_kms->smp, &p);
  46         }
  47 }
  48
  49 void mdp5_irq_preinstall(struct msm_kms *kms)
  50 {
  51         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
  52         struct device *dev = &mdp5_kms->pdev->dev;
  53
  54         pm_runtime_get_sync(dev);
  55         mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, 0xffffffff);
  56         mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
  57         pm_runtime_put_sync(dev);
  58 }
  59
  60 int mdp5_irq_postinstall(struct msm_kms *kms)
  61 {
  62         struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  63         struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
  64         struct device *dev = &mdp5_kms->pdev->dev;
  65         struct mdp_irq *error_handler = &mdp5_kms->error_handler;
  66
  67         error_handler->irq = mdp5_irq_error_handler;
  68         error_handler->irqmask = MDP5_IRQ_INTF0_UNDER_RUN |
  69                         MDP5_IRQ_INTF1_UNDER_RUN |
  70                         MDP5_IRQ_INTF2_UNDER_RUN |
  71                         MDP5_IRQ_INTF3_UNDER_RUN;
  72
  73         pm_runtime_get_sync(dev);
  74         mdp_irq_register(mdp_kms, error_handler);
  75         pm_runtime_put_sync(dev);
  76
  77         return 0;
  78 }
  79
  80 void mdp5_irq_uninstall(struct msm_kms *kms)
  81 {
  82         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
  83         struct device *dev = &mdp5_kms->pdev->dev;
  84
  85         pm_runtime_get_sync(dev);
  86         mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
  87         pm_runtime_put_sync(dev);
  88 }
  89
  90 irqreturn_t mdp5_irq(struct msm_kms *kms)
  91 {
  92         struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  93         struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
  94         struct drm_device *dev = mdp5_kms->dev;
  95         struct msm_drm_private *priv = dev->dev_private;
  96         unsigned int id;
  97         uint32_t status, enable;
  98
  99         enable = mdp5_read(mdp5_kms, REG_MDP5_INTR_EN);
 100         status = mdp5_read(mdp5_kms, REG_MDP5_INTR_STATUS) & enable;
 101         mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, status);
 102
 103         VERB("status=%08x", status);
 104
 105         mdp_dispatch_irqs(mdp_kms, status);
 106
 107         for (id = 0; id < priv->num_crtcs; id++)
 108                 if (status & mdp5_crtc_vblank(priv->crtcs[id]))
 109                         drm_handle_vblank(dev, id);
 110
 111         return IRQ_HANDLED;
 112 }
 113
 114 int mdp5_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 115 {
 116         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
 117         struct device *dev = &mdp5_kms->pdev->dev;
 118
 119         pm_runtime_get_sync(dev);
 120         mdp_update_vblank_mask(to_mdp_kms(kms),
 121                         mdp5_crtc_vblank(crtc), true);
 122         pm_runtime_put_sync(dev);
 123
 124         return 0;
 125 }
 126
 127 void mdp5_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 128 {
 129         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
 130         struct device *dev = &mdp5_kms->pdev->dev;
 131
 132         pm_runtime_get_sync(dev);
 133         mdp_update_vblank_mask(to_mdp_kms(kms),
 134                         mdp5_crtc_vblank(crtc), false);
 135         pm_runtime_put_sync(dev);
 136 }