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f26c473c DA |
1 | /* r128_irq.c -- IRQ handling for radeon -*- linux-c -*- */ |
2 | /* | |
1da177e4 | 3 | * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved. |
b5e89ed5 | 4 | * |
1da177e4 LT |
5 | * The Weather Channel (TM) funded Tungsten Graphics to develop the |
6 | * initial release of the Radeon 8500 driver under the XFree86 license. | |
7 | * This notice must be preserved. | |
8 | * | |
9 | * Permission is hereby granted, free of charge, to any person obtaining a | |
10 | * copy of this software and associated documentation files (the "Software"), | |
11 | * to deal in the Software without restriction, including without limitation | |
12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
13 | * and/or sell copies of the Software, and to permit persons to whom the | |
14 | * Software is furnished to do so, subject to the following conditions: | |
15 | * | |
16 | * The above copyright notice and this permission notice (including the next | |
17 | * paragraph) shall be included in all copies or substantial portions of the | |
18 | * Software. | |
19 | * | |
20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
23 | * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
24 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
25 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
26 | * DEALINGS IN THE SOFTWARE. | |
27 | * | |
28 | * Authors: | |
29 | * Keith Whitwell <keith@tungstengraphics.com> | |
30 | * Eric Anholt <anholt@FreeBSD.org> | |
31 | */ | |
32 | ||
33 | #include "drmP.h" | |
34 | #include "drm.h" | |
35 | #include "r128_drm.h" | |
36 | #include "r128_drv.h" | |
37 | ||
b5e89ed5 | 38 | irqreturn_t r128_driver_irq_handler(DRM_IRQ_ARGS) |
1da177e4 | 39 | { |
eddca551 | 40 | struct drm_device *dev = (struct drm_device *) arg; |
b5e89ed5 | 41 | drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; |
1da177e4 LT |
42 | int status; |
43 | ||
b5e89ed5 DA |
44 | status = R128_READ(R128_GEN_INT_STATUS); |
45 | ||
1da177e4 | 46 | /* VBLANK interrupt */ |
b5e89ed5 DA |
47 | if (status & R128_CRTC_VBLANK_INT) { |
48 | R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK); | |
af6061af DA |
49 | atomic_inc(&dev->vbl_received); |
50 | DRM_WAKEUP(&dev->vbl_queue); | |
51 | drm_vbl_send_signals(dev); | |
1da177e4 LT |
52 | return IRQ_HANDLED; |
53 | } | |
54 | return IRQ_NONE; | |
55 | } | |
56 | ||
af6061af | 57 | int r128_driver_vblank_wait(struct drm_device * dev, unsigned int *sequence) |
1da177e4 | 58 | { |
af6061af DA |
59 | unsigned int cur_vblank; |
60 | int ret = 0; | |
1da177e4 | 61 | |
af6061af DA |
62 | /* Assume that the user has missed the current sequence number |
63 | * by about a day rather than she wants to wait for years | |
64 | * using vertical blanks... | |
65 | */ | |
66 | DRM_WAIT_ON(ret, dev->vbl_queue, 3 * DRM_HZ, | |
67 | (((cur_vblank = atomic_read(&dev->vbl_received)) | |
68 | - *sequence) <= (1 << 23))); | |
ac741ab7 | 69 | |
af6061af | 70 | *sequence = cur_vblank; |
1da177e4 | 71 | |
af6061af | 72 | return ret; |
1da177e4 LT |
73 | } |
74 | ||
eddca551 | 75 | void r128_driver_irq_preinstall(struct drm_device * dev) |
b5e89ed5 DA |
76 | { |
77 | drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; | |
1da177e4 LT |
78 | |
79 | /* Disable *all* interrupts */ | |
b5e89ed5 | 80 | R128_WRITE(R128_GEN_INT_CNTL, 0); |
1da177e4 | 81 | /* Clear vblank bit if it's already high */ |
b5e89ed5 | 82 | R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK); |
1da177e4 LT |
83 | } |
84 | ||
af6061af | 85 | void r128_driver_irq_postinstall(struct drm_device * dev) |
b5e89ed5 | 86 | { |
af6061af DA |
87 | drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; |
88 | ||
89 | /* Turn on VBL interrupt */ | |
90 | R128_WRITE(R128_GEN_INT_CNTL, R128_CRTC_VBLANK_INT_EN); | |
1da177e4 LT |
91 | } |
92 | ||
eddca551 | 93 | void r128_driver_irq_uninstall(struct drm_device * dev) |
b5e89ed5 DA |
94 | { |
95 | drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; | |
1da177e4 LT |
96 | if (!dev_priv) |
97 | return; | |
98 | ||
99 | /* Disable *all* interrupts */ | |
b5e89ed5 | 100 | R128_WRITE(R128_GEN_INT_CNTL, 0); |
1da177e4 | 101 | } |