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         }
  35 }
  36
  37 void mdp5_irq_preinstall(struct msm_kms *kms)
  38 {
  39         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
  40         struct device *dev = &mdp5_kms->pdev->dev;
  41
  42         pm_runtime_get_sync(dev);
  43         mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, 0xffffffff);
  44         mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
  45         pm_runtime_put_sync(dev);
  46 }
  47
  48 int mdp5_irq_postinstall(struct msm_kms *kms)
  49 {
  50         struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  51         struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
  52         struct device *dev = &mdp5_kms->pdev->dev;
  53         struct mdp_irq *error_handler = &mdp5_kms->error_handler;
  54
  55         error_handler->irq = mdp5_irq_error_handler;
  56         error_handler->irqmask = MDP5_IRQ_INTF0_UNDER_RUN |
  57                         MDP5_IRQ_INTF1_UNDER_RUN |
  58                         MDP5_IRQ_INTF2_UNDER_RUN |
  59                         MDP5_IRQ_INTF3_UNDER_RUN;
  60
  61         pm_runtime_get_sync(dev);
  62         mdp_irq_register(mdp_kms, error_handler);
  63         pm_runtime_put_sync(dev);
  64
  65         return 0;
  66 }
  67
  68 void mdp5_irq_uninstall(struct msm_kms *kms)
  69 {
  70         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
  71         struct device *dev = &mdp5_kms->pdev->dev;
  72
  73         pm_runtime_get_sync(dev);
  74         mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
  75         pm_runtime_put_sync(dev);
  76 }
  77
  78 irqreturn_t mdp5_irq(struct msm_kms *kms)
  79 {
  80         struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  81         struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
  82         struct drm_device *dev = mdp5_kms->dev;
  83         struct drm_crtc *crtc;
  84         uint32_t status, enable;
  85
  86         enable = mdp5_read(mdp5_kms, REG_MDP5_INTR_EN);
  87         status = mdp5_read(mdp5_kms, REG_MDP5_INTR_STATUS) & enable;
  88         mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, status);
  89
  90         VERB("status=%08x", status);
  91
  92         mdp_dispatch_irqs(mdp_kms, status);
  93
  94         drm_for_each_crtc(crtc, dev)
  95                 if (status & mdp5_crtc_vblank(crtc))
  96                         drm_crtc_handle_vblank(crtc);
  97
  98         return IRQ_HANDLED;
  99 }
 100
 101 int mdp5_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 102 {
 103         struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
 104         struct device *dev = &mdp5_kms->pdev->dev;
 105
 106         pm_runtime_get_sync(dev);
 107         mdp_update_vblank_mask(to_mdp_kms(kms),
 108                         mdp5_crtc_vblank(crtc), true);
 109         pm_runtime_put_sync(dev);
 110
 111         return 0;
 112 }
 113
 114 void mdp5_disable_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), false);
 122         pm_runtime_put_sync(dev);
 123 }