drivers/gpu/drm/msm/disp/mdp5/mdp5_irq.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2013 Red Hat
   4  * Author: Rob Clark <robdclark@gmail.com>
   5  */
   6
   7 #include <linux/irq.h>
   8
   9 #include <drm/drm_print.h>
  10
  11 #include "msm_drv.h"
  12 #include "mdp5_kms.h"
  13
  14 void mdp5_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask,
  15                 uint32_t old_irqmask)
  16 {
  17         mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_CLEAR,
  18                    irqmask ^ (irqmask & old_irqmask));
  19         mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_EN, irqmask);
  20 }
  21
  22 static void mdp5_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
  23 {
  24         struct mdp5_kms *mdp5_kms = container_of(irq, struct mdp5_kms, error_handler);
  25         static DEFINE_RATELIMIT_STATE(rs, 5*HZ, 1);
  26         extern bool dumpstate;
  27
  28         DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
  29
  30         if (dumpstate && __ratelimit(&rs)) {
  31                 struct drm_printer p = drm_info_printer(mdp5_kms->dev->dev);
  32                 drm_state_dump(mdp5_kms->dev, &p);
  33                 if (mdp5_kms->smp)
  34                         mdp5_smp_dump(mdp5_kms->smp, &p);
  35         }
  36 }
  37
  38 void mdp5_irq_preinstall(struct msm_kms *kms)
  39 {
  40         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
  41         struct device *dev = &mdp5_kms->pdev->dev;
  42
  43         pm_runtime_get_sync(dev);
  44         mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, 0xffffffff);
  45         mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
  46         pm_runtime_put_sync(dev);
  47 }
  48
  49 int mdp5_irq_postinstall(struct msm_kms *kms)
  50 {
  51         struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  52         struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
  53         struct device *dev = &mdp5_kms->pdev->dev;
  54         struct mdp_irq *error_handler = &mdp5_kms->error_handler;
  55
  56         error_handler->irq = mdp5_irq_error_handler;
  57         error_handler->irqmask = MDP5_IRQ_INTF0_UNDER_RUN |
  58                         MDP5_IRQ_INTF1_UNDER_RUN |
  59                         MDP5_IRQ_INTF2_UNDER_RUN |
  60                         MDP5_IRQ_INTF3_UNDER_RUN;
  61
  62         pm_runtime_get_sync(dev);
  63         mdp_irq_register(mdp_kms, error_handler);
  64         pm_runtime_put_sync(dev);
  65
  66         return 0;
  67 }
  68
  69 void mdp5_irq_uninstall(struct msm_kms *kms)
  70 {
  71         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
  72         struct device *dev = &mdp5_kms->pdev->dev;
  73
  74         pm_runtime_get_sync(dev);
  75         mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
  76         pm_runtime_put_sync(dev);
  77 }
  78
  79 irqreturn_t mdp5_irq(struct msm_kms *kms)
  80 {
  81         struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  82         struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
  83         struct drm_device *dev = mdp5_kms->dev;
  84         struct msm_drm_private *priv = dev->dev_private;
  85         unsigned int id;
  86         uint32_t status, enable;
  87
  88         enable = mdp5_read(mdp5_kms, REG_MDP5_INTR_EN);
  89         status = mdp5_read(mdp5_kms, REG_MDP5_INTR_STATUS) & enable;
  90         mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, status);
  91
  92         VERB("status=%08x", status);
  93
  94         mdp_dispatch_irqs(mdp_kms, status);
  95
  96         for (id = 0; id < priv->num_crtcs; id++)
  97                 if (status & mdp5_crtc_vblank(priv->crtcs[id]))
  98                         drm_handle_vblank(dev, id);
  99
 100         return IRQ_HANDLED;
 101 }
 102
 103 int mdp5_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 104 {
 105         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
 106         struct device *dev = &mdp5_kms->pdev->dev;
 107
 108         pm_runtime_get_sync(dev);
 109         mdp_update_vblank_mask(to_mdp_kms(kms),
 110                         mdp5_crtc_vblank(crtc), true);
 111         pm_runtime_put_sync(dev);
 112
 113         return 0;
 114 }
 115
 116 void mdp5_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 117 {
 118         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
 119         struct device *dev = &mdp5_kms->pdev->dev;
 120
 121         pm_runtime_get_sync(dev);
 122         mdp_update_vblank_mask(to_mdp_kms(kms),
 123                         mdp5_crtc_vblank(crtc), false);
 124         pm_runtime_put_sync(dev);
 125 }