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
radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)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 */
radeon_hotplug_work_func(struct work_struct * work)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
radeon_driver_irq_preinstall_kms(struct drm_device * dev)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 /* Disable *all* interrupts */
68 rdev->irq.sw_int = false;
69 rdev->irq.gui_idle = false;
70 for (i = 0; i < rdev->num_crtc; i++)
71 rdev->irq.crtc_vblank_int[i] = false;
72 for (i = 0; i < 6; i++) {
73 rdev->irq.hpd[i] = false;
74 rdev->irq.pflip[i] = false;
75 }
76 radeon_irq_set(rdev);
77 /* Clear bits */
78 radeon_irq_process(rdev);
79 }
80
radeon_driver_irq_postinstall_kms(struct drm_device * dev)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
radeon_driver_irq_uninstall_kms(struct drm_device * dev)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 rdev->irq.pflip[i] = false;
107 }
108 radeon_irq_set(rdev);
109 }
110
radeon_irq_kms_init(struct radeon_device * rdev)111 int radeon_irq_kms_init(struct radeon_device *rdev)
112 {
113 int i;
114 int r = 0;
115
116 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
117
118 spin_lock_init(&rdev->irq.sw_lock);
119 for (i = 0; i < rdev->num_crtc; i++)
120 spin_lock_init(&rdev->irq.pflip_lock[i]);
121 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
122 if (r) {
123 return r;
124 }
125 /* enable msi */
126 rdev->msi_enabled = 0;
127 /* MSIs don't seem to work reliably on all IGP
128 * chips. Disable MSI on them for now.
129 */
130 if ((rdev->family >= CHIP_RV380) &&
131 ((!(rdev->flags & RADEON_IS_IGP)) || (rdev->family >= CHIP_PALM)) &&
132 (!(rdev->flags & RADEON_IS_AGP))) {
133 int ret = pci_enable_msi(rdev->pdev);
134 if (!ret) {
135 rdev->msi_enabled = 1;
136 dev_info(rdev->dev, "radeon: using MSI.\n");
137 }
138 }
139 rdev->irq.installed = true;
140 r = drm_irq_install(rdev->ddev);
141 if (r) {
142 rdev->irq.installed = false;
143 return r;
144 }
145 DRM_INFO("radeon: irq initialized.\n");
146 return 0;
147 }
148
radeon_irq_kms_fini(struct radeon_device * rdev)149 void radeon_irq_kms_fini(struct radeon_device *rdev)
150 {
151 drm_vblank_cleanup(rdev->ddev);
152 if (rdev->irq.installed) {
153 drm_irq_uninstall(rdev->ddev);
154 rdev->irq.installed = false;
155 if (rdev->msi_enabled)
156 pci_disable_msi(rdev->pdev);
157 }
158 flush_work_sync(&rdev->hotplug_work);
159 }
160
radeon_irq_kms_sw_irq_get(struct radeon_device * rdev)161 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev)
162 {
163 unsigned long irqflags;
164
165 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
166 if (rdev->ddev->irq_enabled && (++rdev->irq.sw_refcount == 1)) {
167 rdev->irq.sw_int = true;
168 radeon_irq_set(rdev);
169 }
170 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
171 }
172
radeon_irq_kms_sw_irq_put(struct radeon_device * rdev)173 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev)
174 {
175 unsigned long irqflags;
176
177 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
178 BUG_ON(rdev->ddev->irq_enabled && rdev->irq.sw_refcount <= 0);
179 if (rdev->ddev->irq_enabled && (--rdev->irq.sw_refcount == 0)) {
180 rdev->irq.sw_int = false;
181 radeon_irq_set(rdev);
182 }
183 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
184 }
185
radeon_irq_kms_pflip_irq_get(struct radeon_device * rdev,int crtc)186 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
187 {
188 unsigned long irqflags;
189
190 if (crtc < 0 || crtc >= rdev->num_crtc)
191 return;
192
193 spin_lock_irqsave(&rdev->irq.pflip_lock[crtc], irqflags);
194 if (rdev->ddev->irq_enabled && (++rdev->irq.pflip_refcount[crtc] == 1)) {
195 rdev->irq.pflip[crtc] = true;
196 radeon_irq_set(rdev);
197 }
198 spin_unlock_irqrestore(&rdev->irq.pflip_lock[crtc], irqflags);
199 }
200
radeon_irq_kms_pflip_irq_put(struct radeon_device * rdev,int crtc)201 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
202 {
203 unsigned long irqflags;
204
205 if (crtc < 0 || crtc >= rdev->num_crtc)
206 return;
207
208 spin_lock_irqsave(&rdev->irq.pflip_lock[crtc], irqflags);
209 BUG_ON(rdev->ddev->irq_enabled && rdev->irq.pflip_refcount[crtc] <= 0);
210 if (rdev->ddev->irq_enabled && (--rdev->irq.pflip_refcount[crtc] == 0)) {
211 rdev->irq.pflip[crtc] = false;
212 radeon_irq_set(rdev);
213 }
214 spin_unlock_irqrestore(&rdev->irq.pflip_lock[crtc], irqflags);
215 }
216
217