drivers/gpu/drm/nouveau/nouveau_irq.c

   1 /*
   2  * Copyright 2012 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Ben Skeggs
  23  */
  24
  25 #include <subdev/mc.h>
  26
  27 #include "nouveau_drm.h"
  28 #include "nouveau_irq.h"
  29 #include "nv50_display.h"
  30
  31 void
  32 nouveau_irq_preinstall(struct drm_device *dev)
  33 {
  34         nv_wr32(nouveau_dev(dev), 0x000140, 0x00000000);
  35 }
  36
  37 int
  38 nouveau_irq_postinstall(struct drm_device *dev)
  39 {
  40         nv_wr32(nouveau_dev(dev), 0x000140, 0x00000001);
  41         return 0;
  42 }
  43
  44 void
  45 nouveau_irq_uninstall(struct drm_device *dev)
  46 {
  47         nv_wr32(nouveau_dev(dev), 0x000140, 0x00000000);
  48 }
  49
  50 irqreturn_t
  51 nouveau_irq_handler(DRM_IRQ_ARGS)
  52 {
  53         struct drm_device *dev = arg;
  54         struct nouveau_device *device = nouveau_dev(dev);
  55         struct nouveau_mc *pmc = nouveau_mc(device);
  56         u32 stat;
  57
  58         stat = nv_rd32(device, 0x000100);
  59         if (stat == 0 || stat == ~0)
  60                 return IRQ_NONE;
  61
  62         nv_subdev(pmc)->intr(nv_subdev(pmc));
  63
  64         if (device->card_type >= NV_D0) {
  65                 if (nv_rd32(device, 0x000100) & 0x04000000)
  66                         nvd0_display_intr(dev);
  67         } else
  68         if (device->card_type >= NV_50) {
  69                 if (nv_rd32(device, 0x000100) & 0x04000000)
  70                         nv50_display_intr(dev);
  71         }
  72
  73         return IRQ_HANDLED;
  74 }
  75
  76 int
  77 nouveau_irq_init(struct drm_device *dev)
  78 {
  79         return drm_irq_install(dev);
  80 }
  81
  82 void
  83 nouveau_irq_fini(struct drm_device *dev)
  84 {
  85         drm_irq_uninstall(dev);
  86 }