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 /* we can race here at startup, some boards seem to trigger
83 * hotplug irqs when they shouldn't. */
84 if (!rdev->mode_info.mode_config_initialized)
87 mutex_lock(&mode_config->mutex);
88 if (mode_config->num_connector) {
89 list_for_each_entry(connector, &mode_config->connector_list, head)
90 radeon_connector_hotplug(connector);
92 mutex_unlock(&mode_config->mutex);
93 /* Just fire off a uevent and let userspace tell us what to do */
94 drm_helper_hpd_irq_event(dev);
97 static void radeon_dp_work_func(struct work_struct *work)
99 struct radeon_device *rdev = container_of(work, struct radeon_device,
101 struct drm_device *dev = rdev->ddev;
102 struct drm_mode_config *mode_config = &dev->mode_config;
103 struct drm_connector *connector;
105 /* this should take a mutex */
106 if (mode_config->num_connector) {
107 list_for_each_entry(connector, &mode_config->connector_list, head)
108 radeon_connector_hotplug(connector);
112 * radeon_driver_irq_preinstall_kms - drm irq preinstall callback
114 * @dev: drm dev pointer
116 * Gets the hw ready to enable irqs (all asics).
117 * This function disables all interrupt sources on the GPU.
119 void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
121 struct radeon_device *rdev = dev->dev_private;
122 unsigned long irqflags;
125 spin_lock_irqsave(&rdev->irq.lock, irqflags);
126 /* Disable *all* interrupts */
127 for (i = 0; i < RADEON_NUM_RINGS; i++)
128 atomic_set(&rdev->irq.ring_int[i], 0);
129 rdev->irq.dpm_thermal = false;
130 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
131 rdev->irq.hpd[i] = false;
132 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
133 rdev->irq.crtc_vblank_int[i] = false;
134 atomic_set(&rdev->irq.pflip[i], 0);
135 rdev->irq.afmt[i] = false;
137 radeon_irq_set(rdev);
138 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
140 radeon_irq_process(rdev);
144 * radeon_driver_irq_postinstall_kms - drm irq preinstall callback
146 * @dev: drm dev pointer
148 * Handles stuff to be done after enabling irqs (all asics).
149 * Returns 0 on success.
151 int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
153 struct radeon_device *rdev = dev->dev_private;
155 if (ASIC_IS_AVIVO(rdev))
156 dev->max_vblank_count = 0x00ffffff;
158 dev->max_vblank_count = 0x001fffff;
164 * radeon_driver_irq_uninstall_kms - drm irq uninstall callback
166 * @dev: drm dev pointer
168 * This function disables all interrupt sources on the GPU (all asics).
170 void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
172 struct radeon_device *rdev = dev->dev_private;
173 unsigned long irqflags;
179 spin_lock_irqsave(&rdev->irq.lock, irqflags);
180 /* Disable *all* interrupts */
181 for (i = 0; i < RADEON_NUM_RINGS; i++)
182 atomic_set(&rdev->irq.ring_int[i], 0);
183 rdev->irq.dpm_thermal = false;
184 for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
185 rdev->irq.hpd[i] = false;
186 for (i = 0; i < RADEON_MAX_CRTCS; i++) {
187 rdev->irq.crtc_vblank_int[i] = false;
188 atomic_set(&rdev->irq.pflip[i], 0);
189 rdev->irq.afmt[i] = false;
191 radeon_irq_set(rdev);
192 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
196 * radeon_msi_ok - asic specific msi checks
198 * @rdev: radeon device pointer
200 * Handles asic specific MSI checks to determine if
201 * MSIs should be enabled on a particular chip (all asics).
202 * Returns true if MSIs should be enabled, false if MSIs
203 * should not be enabled.
205 static bool radeon_msi_ok(struct radeon_device *rdev)
207 /* RV370/RV380 was first asic with MSI support */
208 if (rdev->family < CHIP_RV380)
211 /* MSIs don't work on AGP */
212 if (rdev->flags & RADEON_IS_AGP)
216 * Older chips have a HW limitation, they can only generate 40 bits
217 * of address for "64-bit" MSIs which breaks on some platforms, notably
218 * IBM POWER servers, so we limit them
220 if (rdev->family < CHIP_BONAIRE) {
221 dev_info(rdev->dev, "radeon: MSI limited to 32-bit\n");
222 rdev->pdev->no_64bit_msi = 1;
228 else if (radeon_msi == 0)
232 /* HP RS690 only seems to work with MSIs. */
233 if ((rdev->pdev->device == 0x791f) &&
234 (rdev->pdev->subsystem_vendor == 0x103c) &&
235 (rdev->pdev->subsystem_device == 0x30c2))
238 /* Dell RS690 only seems to work with MSIs. */
239 if ((rdev->pdev->device == 0x791f) &&
240 (rdev->pdev->subsystem_vendor == 0x1028) &&
241 (rdev->pdev->subsystem_device == 0x01fc))
244 /* Dell RS690 only seems to work with MSIs. */
245 if ((rdev->pdev->device == 0x791f) &&
246 (rdev->pdev->subsystem_vendor == 0x1028) &&
247 (rdev->pdev->subsystem_device == 0x01fd))
250 /* Gateway RS690 only seems to work with MSIs. */
251 if ((rdev->pdev->device == 0x791f) &&
252 (rdev->pdev->subsystem_vendor == 0x107b) &&
253 (rdev->pdev->subsystem_device == 0x0185))
256 /* try and enable MSIs by default on all RS690s */
257 if (rdev->family == CHIP_RS690)
260 /* RV515 seems to have MSI issues where it loses
261 * MSI rearms occasionally. This leads to lockups and freezes.
262 * disable it by default.
264 if (rdev->family == CHIP_RV515)
266 if (rdev->flags & RADEON_IS_IGP) {
267 /* APUs work fine with MSIs */
268 if (rdev->family >= CHIP_PALM)
270 /* lots of IGPs have problems with MSIs */
278 * radeon_irq_kms_init - init driver interrupt info
280 * @rdev: radeon device pointer
282 * Sets up the work irq handlers, vblank init, MSIs, etc. (all asics).
283 * Returns 0 for success, error for failure.
285 int radeon_irq_kms_init(struct radeon_device *rdev)
289 spin_lock_init(&rdev->irq.lock);
290 r = drm_vblank_init(rdev->ddev, rdev->num_crtc);
294 rdev->ddev->vblank_disable_allowed = true;
297 rdev->msi_enabled = 0;
299 if (radeon_msi_ok(rdev)) {
300 int ret = pci_enable_msi(rdev->pdev);
302 rdev->msi_enabled = 1;
303 dev_info(rdev->dev, "radeon: using MSI.\n");
307 INIT_DELAYED_WORK(&rdev->hotplug_work, radeon_hotplug_work_func);
308 INIT_WORK(&rdev->dp_work, radeon_dp_work_func);
309 INIT_WORK(&rdev->audio_work, r600_audio_update_hdmi);
311 rdev->irq.installed = true;
312 r = drm_irq_install(rdev->ddev, rdev->ddev->pdev->irq);
314 rdev->irq.installed = false;
315 flush_delayed_work(&rdev->hotplug_work);
319 DRM_INFO("radeon: irq initialized.\n");
324 * radeon_irq_kms_fini - tear down driver interrupt info
326 * @rdev: radeon device pointer
328 * Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
330 void radeon_irq_kms_fini(struct radeon_device *rdev)
332 drm_vblank_cleanup(rdev->ddev);
333 if (rdev->irq.installed) {
334 drm_irq_uninstall(rdev->ddev);
335 rdev->irq.installed = false;
336 if (rdev->msi_enabled)
337 pci_disable_msi(rdev->pdev);
338 flush_delayed_work(&rdev->hotplug_work);
343 * radeon_irq_kms_sw_irq_get - enable software interrupt
345 * @rdev: radeon device pointer
346 * @ring: ring whose interrupt you want to enable
348 * Enables the software interrupt for a specific ring (all asics).
349 * The software interrupt is generally used to signal a fence on
352 void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
354 unsigned long irqflags;
356 if (!rdev->ddev->irq_enabled)
359 if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
360 spin_lock_irqsave(&rdev->irq.lock, irqflags);
361 radeon_irq_set(rdev);
362 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
367 * radeon_irq_kms_sw_irq_get_delayed - enable software interrupt
369 * @rdev: radeon device pointer
370 * @ring: ring whose interrupt you want to enable
372 * Enables the software interrupt for a specific ring (all asics).
373 * The software interrupt is generally used to signal a fence on
376 bool radeon_irq_kms_sw_irq_get_delayed(struct radeon_device *rdev, int ring)
378 return atomic_inc_return(&rdev->irq.ring_int[ring]) == 1;
382 * radeon_irq_kms_sw_irq_put - disable software interrupt
384 * @rdev: radeon device pointer
385 * @ring: ring whose interrupt you want to disable
387 * Disables the software interrupt for a specific ring (all asics).
388 * The software interrupt is generally used to signal a fence on
391 void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
393 unsigned long irqflags;
395 if (!rdev->ddev->irq_enabled)
398 if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
399 spin_lock_irqsave(&rdev->irq.lock, irqflags);
400 radeon_irq_set(rdev);
401 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
406 * radeon_irq_kms_pflip_irq_get - enable pageflip interrupt
408 * @rdev: radeon device pointer
409 * @crtc: crtc whose interrupt you want to enable
411 * Enables the pageflip interrupt for a specific crtc (all asics).
412 * For pageflips we use the vblank interrupt source.
414 void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
416 unsigned long irqflags;
418 if (crtc < 0 || crtc >= rdev->num_crtc)
421 if (!rdev->ddev->irq_enabled)
424 if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
425 spin_lock_irqsave(&rdev->irq.lock, irqflags);
426 radeon_irq_set(rdev);
427 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
432 * radeon_irq_kms_pflip_irq_put - disable pageflip interrupt
434 * @rdev: radeon device pointer
435 * @crtc: crtc whose interrupt you want to disable
437 * Disables the pageflip interrupt for a specific crtc (all asics).
438 * For pageflips we use the vblank interrupt source.
440 void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
442 unsigned long irqflags;
444 if (crtc < 0 || crtc >= rdev->num_crtc)
447 if (!rdev->ddev->irq_enabled)
450 if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
451 spin_lock_irqsave(&rdev->irq.lock, irqflags);
452 radeon_irq_set(rdev);
453 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
458 * radeon_irq_kms_enable_afmt - enable audio format change interrupt
460 * @rdev: radeon device pointer
461 * @block: afmt block whose interrupt you want to enable
463 * Enables the afmt change interrupt for a specific afmt block (all asics).
465 void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
467 unsigned long irqflags;
469 if (!rdev->ddev->irq_enabled)
472 spin_lock_irqsave(&rdev->irq.lock, irqflags);
473 rdev->irq.afmt[block] = true;
474 radeon_irq_set(rdev);
475 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
480 * radeon_irq_kms_disable_afmt - disable audio format change interrupt
482 * @rdev: radeon device pointer
483 * @block: afmt block whose interrupt you want to disable
485 * Disables the afmt change interrupt for a specific afmt block (all asics).
487 void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
489 unsigned long irqflags;
491 if (!rdev->ddev->irq_enabled)
494 spin_lock_irqsave(&rdev->irq.lock, irqflags);
495 rdev->irq.afmt[block] = false;
496 radeon_irq_set(rdev);
497 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
501 * radeon_irq_kms_enable_hpd - enable hotplug detect interrupt
503 * @rdev: radeon device pointer
504 * @hpd_mask: mask of hpd pins you want to enable.
506 * Enables the hotplug detect interrupt for a specific hpd pin (all asics).
508 void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
510 unsigned long irqflags;
513 if (!rdev->ddev->irq_enabled)
516 spin_lock_irqsave(&rdev->irq.lock, irqflags);
517 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
518 rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
519 radeon_irq_set(rdev);
520 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
524 * radeon_irq_kms_disable_hpd - disable hotplug detect interrupt
526 * @rdev: radeon device pointer
527 * @hpd_mask: mask of hpd pins you want to disable.
529 * Disables the hotplug detect interrupt for a specific hpd pin (all asics).
531 void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
533 unsigned long irqflags;
536 if (!rdev->ddev->irq_enabled)
539 spin_lock_irqsave(&rdev->irq.lock, irqflags);
540 for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
541 rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));
542 radeon_irq_set(rdev);
543 spin_unlock_irqrestore(&rdev->irq.lock, irqflags);