drivers/gpu/drm/radeon/radeon_irq_kms.c

   1 /*
   2  * Copyright 2008 Advanced Micro Devices, Inc.
   3  * Copyright 2008 Red Hat Inc.
   4  * Copyright 2009 Jerome Glisse.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors: Dave Airlie
  25  *          Alex Deucher
  26  *          Jerome Glisse
  27  */
  28 #include "drmP.h"
  29 #include "radeon_drm.h"
  30 #include "radeon_reg.h"
  31 #include "radeon.h"
  32 #include "atom.h"
  33
  34 irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
  35 {
  36         struct drm_device *dev = (struct drm_device *) arg;
  37         struct radeon_device *rdev = dev->dev_private;
  38
  39         return radeon_irq_process(rdev);
  40 }
  41
  42 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
  43 {
  44         struct radeon_device *rdev = dev->dev_private;
  45         unsigned i;
  46
  47         /* Disable *all* interrupts */
  48         rdev->irq.sw_int = false;
  49         for (i = 0; i < 2; i++) {
  50                 rdev->irq.crtc_vblank_int[i] = false;
  51         }
  52         radeon_irq_set(rdev);
  53         /* Clear bits */
  54         radeon_irq_process(rdev);
  55 }
  56
  57 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
  58 {
  59         struct radeon_device *rdev = dev->dev_private;
  60
  61         dev->max_vblank_count = 0x001fffff;
  62         rdev->irq.sw_int = true;
  63         radeon_irq_set(rdev);
  64         return 0;
  65 }
  66
  67 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
  68 {
  69         struct radeon_device *rdev = dev->dev_private;
  70         unsigned i;
  71
  72         if (rdev == NULL) {
  73                 return;
  74         }
  75         /* Disable *all* interrupts */
  76         rdev->irq.sw_int = false;
  77         for (i = 0; i < 2; i++) {
  78                 rdev->irq.crtc_vblank_int[i] = false;
  79         }
  80         radeon_irq_set(rdev);
  81 }
  82
  83 int radeon_irq_kms_init(struct radeon_device *rdev)
  84 {
  85         int r = 0;
  86         int num_crtc = 2;
  87
  88         if (rdev->flags & RADEON_SINGLE_CRTC)
  89                 num_crtc = 1;
  90
  91         r = drm_vblank_init(rdev->ddev, num_crtc);
  92         if (r) {
  93                 return r;
  94         }
  95         drm_irq_install(rdev->ddev);
  96         rdev->irq.installed = true;
  97         DRM_INFO("radeon: irq initialized.\n");
  98         return 0;
  99 }
 100
 101 void radeon_irq_kms_fini(struct radeon_device *rdev)
 102 {
 103         if (rdev->irq.installed) {
 104                 rdev->irq.installed = false;
 105                 drm_irq_uninstall(rdev->ddev);
 106         }
 107 }