Dave Airlie | f26c473 | 2006-01-02 17:18:39 +1100 | [diff] [blame] | 1 | /* r128_irq.c -- IRQ handling for radeon -*- linux-c -*- */ |
| 2 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 4 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 33 | #include <drm/drmP.h> |
| 34 | #include <drm/r128_drm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include "r128_drv.h" |
| 36 | |
Thierry Reding | 88e7271 | 2015-09-24 18:35:31 +0200 | [diff] [blame] | 37 | u32 r128_get_vblank_counter(struct drm_device *dev, unsigned int pipe) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 38 | { |
| 39 | const drm_r128_private_t *dev_priv = dev->dev_private; |
| 40 | |
Thierry Reding | 88e7271 | 2015-09-24 18:35:31 +0200 | [diff] [blame] | 41 | if (pipe != 0) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 42 | return 0; |
| 43 | |
| 44 | return atomic_read(&dev_priv->vbl_received); |
| 45 | } |
| 46 | |
Daniel Vetter | e9f0d76 | 2013-12-11 11:34:42 +0100 | [diff] [blame] | 47 | irqreturn_t r128_driver_irq_handler(int irq, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | { |
Dave Airlie | eddca55 | 2007-07-11 16:09:54 +1000 | [diff] [blame] | 49 | struct drm_device *dev = (struct drm_device *) arg; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 50 | drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | int status; |
| 52 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 53 | status = R128_READ(R128_GEN_INT_STATUS); |
| 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | /* VBLANK interrupt */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 56 | if (status & R128_CRTC_VBLANK_INT) { |
| 57 | R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 58 | atomic_inc(&dev_priv->vbl_received); |
| 59 | drm_handle_vblank(dev, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | return IRQ_HANDLED; |
| 61 | } |
| 62 | return IRQ_NONE; |
| 63 | } |
| 64 | |
Thierry Reding | 88e7271 | 2015-09-24 18:35:31 +0200 | [diff] [blame] | 65 | int r128_enable_vblank(struct drm_device *dev, unsigned int pipe) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | { |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 67 | drm_r128_private_t *dev_priv = dev->dev_private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
Thierry Reding | 88e7271 | 2015-09-24 18:35:31 +0200 | [diff] [blame] | 69 | if (pipe != 0) { |
| 70 | DRM_ERROR("%s: bad crtc %u\n", __func__, pipe); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 71 | return -EINVAL; |
| 72 | } |
| 73 | |
| 74 | R128_WRITE(R128_GEN_INT_CNTL, R128_CRTC_VBLANK_INT_EN); |
| 75 | return 0; |
| 76 | } |
| 77 | |
Thierry Reding | 88e7271 | 2015-09-24 18:35:31 +0200 | [diff] [blame] | 78 | void r128_disable_vblank(struct drm_device *dev, unsigned int pipe) |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 79 | { |
Thierry Reding | 88e7271 | 2015-09-24 18:35:31 +0200 | [diff] [blame] | 80 | if (pipe != 0) |
| 81 | DRM_ERROR("%s: bad crtc %u\n", __func__, pipe); |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 82 | |
| 83 | /* |
| 84 | * FIXME: implement proper interrupt disable by using the vblank |
| 85 | * counter register (if available) |
| 86 | * |
| 87 | * R128_WRITE(R128_GEN_INT_CNTL, |
| 88 | * R128_READ(R128_GEN_INT_CNTL) & ~R128_CRTC_VBLANK_INT_EN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
| 91 | |
Nicolas Kaiser | bc5e9d6 | 2010-07-12 13:44:23 +0200 | [diff] [blame] | 92 | void r128_driver_irq_preinstall(struct drm_device *dev) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 93 | { |
| 94 | drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
| 96 | /* Disable *all* interrupts */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 97 | R128_WRITE(R128_GEN_INT_CNTL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | /* Clear vblank bit if it's already high */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 99 | R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | } |
| 101 | |
Jesse Barnes | 0a3e67a | 2008-09-30 12:14:26 -0700 | [diff] [blame] | 102 | int r128_driver_irq_postinstall(struct drm_device *dev) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 103 | { |
Keith Packard | 5244021 | 2008-11-18 09:30:25 -0800 | [diff] [blame] | 104 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | } |
| 106 | |
Nicolas Kaiser | bc5e9d6 | 2010-07-12 13:44:23 +0200 | [diff] [blame] | 107 | void r128_driver_irq_uninstall(struct drm_device *dev) |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 108 | { |
| 109 | drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | if (!dev_priv) |
| 111 | return; |
| 112 | |
| 113 | /* Disable *all* interrupts */ |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 114 | R128_WRITE(R128_GEN_INT_CNTL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |