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 #include <drm/drm_vblank.h>
  11
  12 #include "msm_drv.h"
  13 #include "mdp5_kms.h"
  14
  15 void mdp5_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask,
  16                 uint32_t old_irqmask)
  17 {
  18         mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_CLEAR,
  19                    irqmask ^ (irqmask & old_irqmask));
  20         mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_EN, irqmask);
  21 }
  22
  23 static void mdp5_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
  24 {
  25         struct mdp5_kms *mdp5_kms = container_of(irq, struct mdp5_kms, error_handler);
  26         static DEFINE_RATELIMIT_STATE(rs, 5*HZ, 1);
  27         extern bool dumpstate;
  28
  29         DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
  30
  31         if (dumpstate && __ratelimit(&rs)) {
  32                 struct drm_printer p = drm_info_printer(mdp5_kms->dev->dev);
  33                 drm_state_dump(mdp5_kms->dev, &p);
  34                 if (mdp5_kms->smp)
  35                         mdp5_smp_dump(mdp5_kms->smp, &p);
  36         }
  37 }
  38
  39 void mdp5_irq_preinstall(struct msm_kms *kms)
  40 {
  41         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
  42         struct device *dev = &mdp5_kms->pdev->dev;
  43
  44         pm_runtime_get_sync(dev);
  45         mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, 0xffffffff);
  46         mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
  47         pm_runtime_put_sync(dev);
  48 }
  49
  50 int mdp5_irq_postinstall(struct msm_kms *kms)
  51 {
  52         struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  53         struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
  54         struct device *dev = &mdp5_kms->pdev->dev;
  55         struct mdp_irq *error_handler = &mdp5_kms->error_handler;
  56
  57         error_handler->irq = mdp5_irq_error_handler;
  58         error_handler->irqmask = MDP5_IRQ_INTF0_UNDER_RUN |
  59                         MDP5_IRQ_INTF1_UNDER_RUN |
  60                         MDP5_IRQ_INTF2_UNDER_RUN |
  61                         MDP5_IRQ_INTF3_UNDER_RUN;
  62
  63         pm_runtime_get_sync(dev);
  64         mdp_irq_register(mdp_kms, error_handler);
  65         pm_runtime_put_sync(dev);
  66
  67         return 0;
  68 }
  69
  70 void mdp5_irq_uninstall(struct msm_kms *kms)
  71 {
  72         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
  73         struct device *dev = &mdp5_kms->pdev->dev;
  74
  75         pm_runtime_get_sync(dev);
  76         mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
  77         pm_runtime_put_sync(dev);
  78 }
  79
  80 irqreturn_t mdp5_irq(struct msm_kms *kms)
  81 {
  82         struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  83         struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
  84         struct drm_device *dev = mdp5_kms->dev;
  85         struct msm_drm_private *priv = dev->dev_private;
  86         unsigned int id;
  87         uint32_t status, enable;
  88
  89         enable = mdp5_read(mdp5_kms, REG_MDP5_INTR_EN);
  90         status = mdp5_read(mdp5_kms, REG_MDP5_INTR_STATUS) & enable;
  91         mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, status);
  92
  93         VERB("status=%08x", status);
  94
  95         mdp_dispatch_irqs(mdp_kms, status);
  96
  97         for (id = 0; id < priv->num_crtcs; id++)
  98                 if (status & mdp5_crtc_vblank(priv->crtcs[id]))
  99                         drm_handle_vblank(dev, id);
 100
 101         return IRQ_HANDLED;
 102 }
 103
 104 int mdp5_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 105 {
 106         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
 107         struct device *dev = &mdp5_kms->pdev->dev;
 108
 109         pm_runtime_get_sync(dev);
 110         mdp_update_vblank_mask(to_mdp_kms(kms),
 111                         mdp5_crtc_vblank(crtc), true);
 112         pm_runtime_put_sync(dev);
 113
 114         return 0;
 115 }
 116
 117 void mdp5_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 118 {
 119         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
 120         struct device *dev = &mdp5_kms->pdev->dev;
 121
 122         pm_runtime_get_sync(dev);
 123         mdp_update_vblank_mask(to_mdp_kms(kms),
 124                         mdp5_crtc_vblank(crtc), false);
 125         pm_runtime_put_sync(dev);
 126 }