drivers/gpu/drm/msm/disp/mdp4/mdp4_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 <drm/drm_print.h>
   8
   9 #include "msm_drv.h"
  10 #include "mdp4_kms.h"
  11
  12 void mdp4_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask,
  13                 uint32_t old_irqmask)
  14 {
  15         mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_CLEAR,
  16                 irqmask ^ (irqmask & old_irqmask));
  17         mdp4_write(to_mdp4_kms(mdp_kms), REG_MDP4_INTR_ENABLE, irqmask);
  18 }
  19
  20 static void mdp4_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
  21 {
  22         struct mdp4_kms *mdp4_kms = container_of(irq, struct mdp4_kms, error_handler);
  23         static DEFINE_RATELIMIT_STATE(rs, 5*HZ, 1);
  24         extern bool dumpstate;
  25
  26         DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
  27
  28         if (dumpstate && __ratelimit(&rs)) {
  29                 struct drm_printer p = drm_info_printer(mdp4_kms->dev->dev);
  30                 drm_state_dump(mdp4_kms->dev, &p);
  31         }
  32 }
  33
  34 void mdp4_irq_preinstall(struct msm_kms *kms)
  35 {
  36         struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
  37         mdp4_enable(mdp4_kms);
  38         mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, 0xffffffff);
  39         mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000);
  40         mdp4_disable(mdp4_kms);
  41 }
  42
  43 int mdp4_irq_postinstall(struct msm_kms *kms)
  44 {
  45         struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  46         struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms);
  47         struct mdp_irq *error_handler = &mdp4_kms->error_handler;
  48
  49         error_handler->irq = mdp4_irq_error_handler;
  50         error_handler->irqmask = MDP4_IRQ_PRIMARY_INTF_UDERRUN |
  51                         MDP4_IRQ_EXTERNAL_INTF_UDERRUN;
  52
  53         mdp_irq_register(mdp_kms, error_handler);
  54
  55         return 0;
  56 }
  57
  58 void mdp4_irq_uninstall(struct msm_kms *kms)
  59 {
  60         struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
  61         mdp4_enable(mdp4_kms);
  62         mdp4_write(mdp4_kms, REG_MDP4_INTR_ENABLE, 0x00000000);
  63         mdp4_disable(mdp4_kms);
  64 }
  65
  66 irqreturn_t mdp4_irq(struct msm_kms *kms)
  67 {
  68         struct mdp_kms *mdp_kms = to_mdp_kms(kms);
  69         struct mdp4_kms *mdp4_kms = to_mdp4_kms(mdp_kms);
  70         struct drm_device *dev = mdp4_kms->dev;
  71         struct msm_drm_private *priv = dev->dev_private;
  72         unsigned int id;
  73         uint32_t status, enable;
  74
  75         enable = mdp4_read(mdp4_kms, REG_MDP4_INTR_ENABLE);
  76         status = mdp4_read(mdp4_kms, REG_MDP4_INTR_STATUS) & enable;
  77         mdp4_write(mdp4_kms, REG_MDP4_INTR_CLEAR, status);
  78
  79         VERB("status=%08x", status);
  80
  81         mdp_dispatch_irqs(mdp_kms, status);
  82
  83         for (id = 0; id < priv->num_crtcs; id++)
  84                 if (status & mdp4_crtc_vblank(priv->crtcs[id]))
  85                         drm_handle_vblank(dev, id);
  86
  87         return IRQ_HANDLED;
  88 }
  89
  90 int mdp4_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
  91 {
  92         struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
  93
  94         mdp4_enable(mdp4_kms);
  95         mdp_update_vblank_mask(to_mdp_kms(kms),
  96                         mdp4_crtc_vblank(crtc), true);
  97         mdp4_disable(mdp4_kms);
  98
  99         return 0;
 100 }
 101
 102 void mdp4_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 103 {
 104         struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
 105
 106         mdp4_enable(mdp4_kms);
 107         mdp_update_vblank_mask(to_mdp_kms(kms),
 108                         mdp4_crtc_vblank(crtc), false);
 109         mdp4_disable(mdp4_kms);
 110 }