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/drm_crtc_helper.h>
30 #include <drm/radeon_drm.h>
31 #include "radeon_reg.h"
35 #include <linux/pm_runtime.h>
37 #define RADEON_WAIT_IDLE_TIMEOUT 200
40 * radeon_driver_irq_handler_kms - irq handler for KMS
42 * @int irq, void *arg: args
44 * This is the irq handler for the radeon KMS driver (all asics).
45 * radeon_irq_process is a macro that points to the per-asic
46 * irq handler callback.
48 irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg)
50 struct drm_device *dev = (struct drm_device *) arg;
51 struct radeon_device *rdev = dev->dev_private;
54 ret = radeon_irq_process(rdev);
55 if (ret == IRQ_HANDLED)
56 pm_runtime_mark_last_busy(dev->dev);
61 * Handle hotplug events outside the interrupt handler proper.
64 * radeon_hotplug_work_func - display hotplug work handler
68 * This is the hot plug event work handler (all asics).
69 * The work gets scheduled from the irq handler if there
70 * was a hot plug interrupt. It walks the connector table
71 * and calls the hotplug handler for each one, then sends
72 * a drm hotplug event to alert userspace.
74 static void radeon_hotplug_work_func(struct work_struct *work)
76 struct radeon_device *rdev = container_of(work, struct radeon_device,
78 struct drm_device *dev = rdev->ddev;
79 struct drm_mode_config *mode_config = &dev->mode_config;
80 struct drm_connector *connector;
82 if (mode_config->num_connector) {
83 list_for_each_entry(connector, &mode_config->connector_list, head)
84 radeon_connector_hotplug(connector);
86 /* Just fire off a uevent and let userspace tell us what to do */
87 drm_helper_hpd_irq_event(dev);
91 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
93 * @dev: drm dev pointer
95 * Gets the hw ready to enable irqs (all asics).
96 * This function disables all interrupt sources on the GPU.
98 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
100 struct radeon_device *rdev = dev->dev_private;
101 unsigned long irqflags;
104 spin_lock_irqsave(&rdev->irq.lock, irqflags);
105 /* Disable *all* interrupts */
106 for (i = 0; i < RADEON_NUM_RINGS; i++)
107 atomic_set(&rdev->irq.ring_int[i], 0);
108 rdev->irq.dpm_thermal = false;
109 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
110 rdev->irq.hpd[i] = false;
111 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
112 rdev->irq.crtc_vblank_int[i] = false;
113 atomic_set(&rdev->irq.pflip[i], 0);
114 rdev->irq.afmt[i] = false;
116 radeon_irq_set(rdev);
117 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
119 radeon_irq_process(rdev);
123 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
125 * @dev: drm dev pointer
127 * Handles stuff to be done after enabling irqs (all asics).
128 * Returns 0 on success.
130 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
132 dev->max_vblank_count = 0x001fffff;
137 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
139 * @dev: drm dev pointer
141 * This function disables all interrupt sources on the GPU (all asics).
143 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
145 struct radeon_device *rdev = dev->dev_private;
146 unsigned long irqflags;
152 spin_lock_irqsave(&rdev->irq.lock, irqflags);
153 /* Disable *all* interrupts */
154 for (i = 0; i < RADEON_NUM_RINGS; i++)
155 atomic_set(&rdev->irq.ring_int[i], 0);
156 rdev->irq.dpm_thermal = false;
157 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
158 rdev->irq.hpd[i] = false;
159 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
160 rdev->irq.crtc_vblank_int[i] = false;
161 atomic_set(&rdev->irq.pflip[i], 0);
162 rdev->irq.afmt[i] = false;
164 radeon_irq_set(rdev);
165 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
169 * radeon_msi_ok - asic specific msi checks
171 * @rdev: radeon device pointer
173 * Handles asic specific MSI checks to determine if
174 * MSIs should be enabled on a particular chip (all asics).
175 * Returns true if MSIs should be enabled, false if MSIs
176 * should not be enabled.
178 static bool radeon_msi_ok(struct radeon_device *rdev)
180 /* RV370/RV380 was first asic with MSI support */
181 if (rdev->family < CHIP_RV380)
184 /* MSIs don't work on AGP */
185 if (rdev->flags & RADEON_IS_AGP)
189 * Older chips have a HW limitation, they can only generate 40 bits
190 * of address for "64-bit" MSIs which breaks on some platforms, notably
191 * IBM POWER servers, so we limit them
193 if (rdev->family < CHIP_BONAIRE) {
194 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n");
195 rdev->pdev->no_64bit_msi = 1;
201 else if (radeon_msi == 0)
205 /* HP RS690 only seems to work with MSIs. */
206 if ((rdev->pdev->device == 0x791f) &&
207 (rdev->pdev->subsystem_vendor == 0x103c) &&
208 (rdev->pdev->subsystem_device == 0x30c2))
211 /* Dell RS690 only seems to work with MSIs. */
212 if ((rdev->pdev->device == 0x791f) &&
213 (rdev->pdev->subsystem_vendor == 0x1028) &&
214 (rdev->pdev->subsystem_device == 0x01fc))
217 /* Dell RS690 only seems to work with MSIs. */
218 if ((rdev->pdev->device == 0x791f) &&
219 (rdev->pdev->subsystem_vendor == 0x1028) &&
220 (rdev->pdev->subsystem_device == 0x01fd))
223 /* Gateway RS690 only seems to work with MSIs. */
224 if ((rdev->pdev->device == 0x791f) &&
225 (rdev->pdev->subsystem_vendor == 0x107b) &&
226 (rdev->pdev->subsystem_device == 0x0185))
229 /* try and enable MSIs by default on all RS690s */
230 if (rdev->family == CHIP_RS690)
233 /* RV515 seems to have MSI issues where it loses
234 * MSI rearms occasionally. This leads to lockups and freezes.
235 * disable it by default.
237 if (rdev->family == CHIP_RV515)
239 if (rdev->flags & RADEON_IS_IGP) {
240 /* APUs work fine with MSIs */
241 if (rdev->family >= CHIP_PALM)
243 /* lots of IGPs have problems with MSIs */
251 * radeon_irq_kms_init - init driver interrupt info
253 * @rdev: radeon device pointer
255 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
256 * Returns 0 for success, error for failure.
258 int radeon_irq_kms_init(struct radeon_device *rdev)
262 spin_lock_init(&rdev->irq.lock);
263 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
268 rdev->msi_enabled = 0;
270 if (radeon_msi_ok(rdev)) {
271 int ret = pci_enable_msi(rdev->pdev);
273 rdev->msi_enabled = 1;
274 dev_info(rdev->dev, "radeon: using MSI.\n");
278 INIT_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
279 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
281 rdev->irq.installed = true;
282 r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq);
284 rdev->irq.installed = false;
285 flush_work(&rdev->hotplug_work);
289 DRM_INFO("radeon: irq initialized.\n");
294 * radeon_irq_kms_fini - tear down driver interrupt info
296 * @rdev: radeon device pointer
298 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
300 void radeon_irq_kms_fini(struct radeon_device *rdev)
302 drm_vblank_cleanup(rdev->ddev);
303 if (rdev->irq.installed) {
304 drm_irq_uninstall(rdev->ddev);
305 rdev->irq.installed = false;
306 if (rdev->msi_enabled)
307 pci_disable_msi(rdev->pdev);
308 flush_work(&rdev->hotplug_work);
313 * radeon_irq_kms_sw_irq_get - enable software interrupt
315 * @rdev: radeon device pointer
316 * @ring: ring whose interrupt you want to enable
318 * Enables the software interrupt for a specific ring (all asics).
319 * The software interrupt is generally used to signal a fence on
322 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
324 unsigned long irqflags;
326 if (!rdev->ddev->irq_enabled)
329 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
330 spin_lock_irqsave(&rdev->irq.lock, irqflags);
331 radeon_irq_set(rdev);
332 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
337 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt
339 * @rdev: radeon device pointer
340 * @ring: ring whose interrupt you want to enable
342 * Enables the software interrupt for a specific ring (all asics).
343 * The software interrupt is generally used to signal a fence on
346 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)
348 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;
352 * radeon_irq_kms_sw_irq_put - disable software interrupt
354 * @rdev: radeon device pointer
355 * @ring: ring whose interrupt you want to disable
357 * Disables the software interrupt for a specific ring (all asics).
358 * The software interrupt is generally used to signal a fence on
361 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
363 unsigned long irqflags;
365 if (!rdev->ddev->irq_enabled)
368 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
369 spin_lock_irqsave(&rdev->irq.lock, irqflags);
370 radeon_irq_set(rdev);
371 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
376 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
378 * @rdev: radeon device pointer
379 * @crtc: crtc whose interrupt you want to enable
381 * Enables the pageflip interrupt for a specific crtc (all asics).
382 * For pageflips we use the vblank interrupt source.
384 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
386 unsigned long irqflags;
388 if (crtc < 0 || crtc >= rdev->num_crtc)
391 if (!rdev->ddev->irq_enabled)
394 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
395 spin_lock_irqsave(&rdev->irq.lock, irqflags);
396 radeon_irq_set(rdev);
397 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
402 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
404 * @rdev: radeon device pointer
405 * @crtc: crtc whose interrupt you want to disable
407 * Disables the pageflip interrupt for a specific crtc (all asics).
408 * For pageflips we use the vblank interrupt source.
410 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
412 unsigned long irqflags;
414 if (crtc < 0 || crtc >= rdev->num_crtc)
417 if (!rdev->ddev->irq_enabled)
420 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
421 spin_lock_irqsave(&rdev->irq.lock, irqflags);
422 radeon_irq_set(rdev);
423 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
428 * radeon_irq_kms_enable_afmt - enable audio format change interrupt
430 * @rdev: radeon device pointer
431 * @block: afmt block whose interrupt you want to enable
433 * Enables the afmt change interrupt for a specific afmt block (all asics).
435 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
437 unsigned long irqflags;
439 if (!rdev->ddev->irq_enabled)
442 spin_lock_irqsave(&rdev->irq.lock, irqflags);
443 rdev->irq.afmt[block] = true;
444 radeon_irq_set(rdev);
445 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
450 * radeon_irq_kms_disable_afmt - disable audio format change interrupt
452 * @rdev: radeon device pointer
453 * @block: afmt block whose interrupt you want to disable
455 * Disables the afmt change interrupt for a specific afmt block (all asics).
457 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
459 unsigned long irqflags;
461 if (!rdev->ddev->irq_enabled)
464 spin_lock_irqsave(&rdev->irq.lock, irqflags);
465 rdev->irq.afmt[block] = false;
466 radeon_irq_set(rdev);
467 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
471 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
473 * @rdev: radeon device pointer
474 * @hpd_mask: mask of hpd pins you want to enable.
476 * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
478 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
480 unsigned long irqflags;
483 if (!rdev->ddev->irq_enabled)
486 spin_lock_irqsave(&rdev->irq.lock, irqflags);
487 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
488 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
489 radeon_irq_set(rdev);
490 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
494 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
496 * @rdev: radeon device pointer
497 * @hpd_mask: mask of hpd pins you want to disable.
499 * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
501 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
503 unsigned long irqflags;
506 if (!rdev->ddev->irq_enabled)
509 spin_lock_irqsave(&rdev->irq.lock, irqflags);
510 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
511 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
512 radeon_irq_set(rdev);
513 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);