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 "drm_crtc_helper.h" 30 #include "radeon_drm.h" 31 #include "radeon_reg.h" 32 #include "radeon.h" 33 #include "atom.h" 34 35 irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS) 36 { 37 struct drm_device *dev = (struct drm_device *) arg; 38 struct radeon_device *rdev = dev->dev_private; 39 40 return radeon_irq_process(rdev); 41 } 42 43 /* 44 * Handle hotplug events outside the interrupt handler proper. 45 */ 46 static void radeon_hotplug_work_func(struct work_struct *work) 47 { 48 struct radeon_device *rdev = container_of(work, struct radeon_device, 49 hotplug_work); 50 struct drm_device *dev = rdev->ddev; 51 struct drm_mode_config *mode_config = &dev->mode_config; 52 struct drm_connector *connector; 53 54 if (mode_config->num_connector) { 55 list_for_each_entry(connector, &mode_config->connector_list, head) 56 radeon_connector_hotplug(connector); 57 } 58 /* Just fire off a uevent and let userspace tell us what to do */ 59 drm_helper_hpd_irq_event(dev); 60 } 61 62 void radeon_driver_irq_preinstall_kms(struct drm_device *dev) 63 { 64 struct radeon_device *rdev = dev->dev_private; 65 unsigned i; 66 67 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func); 68 69 /* Disable *all* interrupts */ 70 rdev->irq.sw_int = false; 71 rdev->irq.gui_idle = false; 72 for (i = 0; i < rdev->num_crtc; i++) 73 rdev->irq.crtc_vblank_int[i] = false; 74 for (i = 0; i < 6; i++) 75 rdev->irq.hpd[i] = false; 76 radeon_irq_set(rdev); 77 /* Clear bits */ 78 radeon_irq_process(rdev); 79 } 80 81 int radeon_driver_irq_postinstall_kms(struct drm_device *dev) 82 { 83 struct radeon_device *rdev = dev->dev_private; 84 85 dev->max_vblank_count = 0x001fffff; 86 rdev->irq.sw_int = true; 87 radeon_irq_set(rdev); 88 return 0; 89 } 90 91 void radeon_driver_irq_uninstall_kms(struct drm_device *dev) 92 { 93 struct radeon_device *rdev = dev->dev_private; 94 unsigned i; 95 96 if (rdev == NULL) { 97 return; 98 } 99 /* Disable *all* interrupts */ 100 rdev->irq.sw_int = false; 101 rdev->irq.gui_idle = false; 102 for (i = 0; i < rdev->num_crtc; i++) 103 rdev->irq.crtc_vblank_int[i] = false; 104 for (i = 0; i < 6; i++) 105 rdev->irq.hpd[i] = false; 106 radeon_irq_set(rdev); 107 } 108 109 int radeon_irq_kms_init(struct radeon_device *rdev) 110 { 111 int r = 0; 112 113 spin_lock_init(&rdev->irq.sw_lock); 114 r = drm_vblank_init(rdev->ddev, rdev->num_crtc); 115 if (r) { 116 return r; 117 } 118 /* enable msi */ 119 rdev->msi_enabled = 0; 120 /* MSIs don't seem to work reliably on all IGP 121 * chips. Disable MSI on them for now. 122 */ 123 if ((rdev->family >= CHIP_RV380) && 124 (!(rdev->flags & RADEON_IS_IGP))) { 125 int ret = pci_enable_msi(rdev->pdev); 126 if (!ret) { 127 rdev->msi_enabled = 1; 128 DRM_INFO("radeon: using MSI.\n"); 129 } 130 } 131 rdev->irq.installed = true; 132 r = drm_irq_install(rdev->ddev); 133 if (r) { 134 rdev->irq.installed = false; 135 return r; 136 } 137 DRM_INFO("radeon: irq initialized.\n"); 138 return 0; 139 } 140 141 void radeon_irq_kms_fini(struct radeon_device *rdev) 142 { 143 drm_vblank_cleanup(rdev->ddev); 144 if (rdev->irq.installed) { 145 drm_irq_uninstall(rdev->ddev); 146 rdev->irq.installed = false; 147 if (rdev->msi_enabled) 148 pci_disable_msi(rdev->pdev); 149 } 150 } 151 152 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev) 153 { 154 unsigned long irqflags; 155 156 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags); 157 if (rdev->ddev->irq_enabled && (++rdev->irq.sw_refcount == 1)) { 158 rdev->irq.sw_int = true; 159 radeon_irq_set(rdev); 160 } 161 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags); 162 } 163 164 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev) 165 { 166 unsigned long irqflags; 167 168 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags); 169 BUG_ON(rdev->ddev->irq_enabled && rdev->irq.sw_refcount <= 0); 170 if (rdev->ddev->irq_enabled && (--rdev->irq.sw_refcount == 0)) { 171 rdev->irq.sw_int = false; 172 radeon_irq_set(rdev); 173 } 174 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags); 175 } 176 177