2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
24 * Authors: Dave Airlie
29 #include "drm_crtc_helper.h"
30 #include "radeon_drm.h"
31 #include "radeon_reg.h"
35 irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
37 struct drm_device *dev = (struct drm_device *) arg;
38 struct radeon_device *rdev = dev->dev_private;
40 return radeon_irq_process(rdev);
44 * Handle hotplug events outside the interrupt handler proper.
46 static void radeon_hotplug_work_func(struct work_struct *work)
48 struct radeon_device *rdev = container_of(work, struct radeon_device,
50 struct drm_device *dev = rdev->ddev;
51 struct drm_mode_config *mode_config = &dev->mode_config;
52 struct drm_connector *connector;
54 mutex_lock(&mode_config->mutex);
55 if (mode_config->num_connector) {
56 list_for_each_entry(connector, &mode_config->connector_list, head)
57 radeon_connector_hotplug(connector);
59 mutex_unlock(&mode_config->mutex);
60 /* Just fire off a uevent and let userspace tell us what to do */
61 drm_helper_hpd_irq_event(dev);
64 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
66 struct radeon_device *rdev = dev->dev_private;
69 /* Disable *all* interrupts */
70 rdev->irq.sw_int = false;
71 rdev->irq.gui_idle = false;
72 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
73 rdev->irq.hpd[i] = false;
74 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
75 rdev->irq.crtc_vblank_int[i] = false;
76 rdev->irq.pflip[i] = false;
80 radeon_irq_process(rdev);
83 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
85 struct radeon_device *rdev = dev->dev_private;
87 dev->max_vblank_count = 0x001fffff;
88 rdev->irq.sw_int = true;
93 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
95 struct radeon_device *rdev = dev->dev_private;
101 /* Disable *all* interrupts */
102 rdev->irq.sw_int = false;
103 rdev->irq.gui_idle = false;
104 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
105 rdev->irq.hpd[i] = false;
106 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
107 rdev->irq.crtc_vblank_int[i] = false;
108 rdev->irq.pflip[i] = false;
110 radeon_irq_set(rdev);
113 static bool radeon_msi_ok(struct radeon_device *rdev)
115 /* RV370/RV380 was first asic with MSI support */
116 if (rdev->family < CHIP_RV380)
119 /* MSIs don't work on AGP */
120 if (rdev->flags & RADEON_IS_AGP)
126 else if (radeon_msi == 0)
130 /* HP RS690 only seems to work with MSIs. */
131 if ((rdev->pdev->device == 0x791f) &&
132 (rdev->pdev->subsystem_vendor == 0x103c) &&
133 (rdev->pdev->subsystem_device == 0x30c2))
136 /* Dell RS690 only seems to work with MSIs. */
137 if ((rdev->pdev->device == 0x791f) &&
138 (rdev->pdev->subsystem_vendor == 0x1028) &&
139 (rdev->pdev->subsystem_device == 0x01fc))
142 /* Dell RS690 only seems to work with MSIs. */
143 if ((rdev->pdev->device == 0x791f) &&
144 (rdev->pdev->subsystem_vendor == 0x1028) &&
145 (rdev->pdev->subsystem_device == 0x01fd))
148 /* Gateway RS690 only seems to work with MSIs. */
149 if ((rdev->pdev->device == 0x791f) &&
150 (rdev->pdev->subsystem_vendor == 0x107b) &&
151 (rdev->pdev->subsystem_device == 0x0185))
154 /* try and enable MSIs by default on all RS690s */
155 if (rdev->family == CHIP_RS690)
158 /* RV515 seems to have MSI issues where it loses
159 * MSI rearms occasionally. This leads to lockups and freezes.
160 * disable it by default.
162 if (rdev->family == CHIP_RV515)
164 if (rdev->flags & RADEON_IS_IGP) {
165 /* APUs work fine with MSIs */
166 if (rdev->family >= CHIP_PALM)
168 /* lots of IGPs have problems with MSIs */
175 int radeon_irq_kms_init(struct radeon_device *rdev)
180 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
182 spin_lock_init(&rdev->irq.sw_lock);
183 for (i = 0; i < rdev->num_crtc; i++)
184 spin_lock_init(&rdev->irq.pflip_lock[i]);
185 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
190 rdev->msi_enabled = 0;
192 if (radeon_msi_ok(rdev)) {
193 int ret = pci_enable_msi(rdev->pdev);
195 rdev->msi_enabled = 1;
196 dev_info(rdev->dev, "radeon: using MSI.\n");
199 rdev->irq.installed = true;
200 r = drm_irq_install(rdev->ddev);
202 rdev->irq.installed = false;
205 DRM_INFO("radeon: irq initialized.\n");
209 void radeon_irq_kms_fini(struct radeon_device *rdev)
211 drm_vblank_cleanup(rdev->ddev);
212 if (rdev->irq.installed) {
213 drm_irq_uninstall(rdev->ddev);
214 rdev->irq.installed = false;
215 if (rdev->msi_enabled)
216 pci_disable_msi(rdev->pdev);
218 flush_work_sync(&rdev->hotplug_work);
221 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev)
223 unsigned long irqflags;
225 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
226 if (rdev->ddev->irq_enabled && (++rdev->irq.sw_refcount == 1)) {
227 rdev->irq.sw_int = true;
228 radeon_irq_set(rdev);
230 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
233 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev)
235 unsigned long irqflags;
237 spin_lock_irqsave(&rdev->irq.sw_lock, irqflags);
238 BUG_ON(rdev->ddev->irq_enabled && rdev->irq.sw_refcount <= 0);
239 if (rdev->ddev->irq_enabled && (--rdev->irq.sw_refcount == 0)) {
240 rdev->irq.sw_int = false;
241 radeon_irq_set(rdev);
243 spin_unlock_irqrestore(&rdev->irq.sw_lock, irqflags);
246 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
248 unsigned long irqflags;
250 if (crtc < 0 || crtc >= rdev->num_crtc)
253 spin_lock_irqsave(&rdev->irq.pflip_lock[crtc], irqflags);
254 if (rdev->ddev->irq_enabled && (++rdev->irq.pflip_refcount[crtc] == 1)) {
255 rdev->irq.pflip[crtc] = true;
256 radeon_irq_set(rdev);
258 spin_unlock_irqrestore(&rdev->irq.pflip_lock[crtc], irqflags);
261 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
263 unsigned long irqflags;
265 if (crtc < 0 || crtc >= rdev->num_crtc)
268 spin_lock_irqsave(&rdev->irq.pflip_lock[crtc], irqflags);
269 BUG_ON(rdev->ddev->irq_enabled && rdev->irq.pflip_refcount[crtc] <= 0);
270 if (rdev->ddev->irq_enabled && (--rdev->irq.pflip_refcount[crtc] == 0)) {
271 rdev->irq.pflip[crtc] = false;
272 radeon_irq_set(rdev);
274 spin_unlock_irqrestore(&rdev->irq.pflip_lock[crtc], irqflags);