renesas/drm.git - libdrm, cloned from git://anongit.freedesktop.org/mesa/drm

Age	Commit message (Expand)	Author
2009-11-20	Update README	Kristian Høgsberg
2009-01-27	Clean up README for the current state of kernel module affairs.	Eric Anholt
2007-04-25	More detailed instructions, tips.	Brian
2005-07-13	distcheck fixes	Adam Jackson
2005-07-10	autoconfiscate libdrm	Adam Jackson

/* mach64_irq.c -- IRQ handling for ATI Mach64 -*- linux-c -*- * Created: Tue Feb 25, 2003 by Leif Delgass, based on radeon_irq.c/r128_irq.c */ /*- * Copyright (C) The Weather Channel, Inc. 2002. * Copyright 2003 Leif Delgass * All Rights Reserved. * * The Weather Channel (TM) funded Tungsten Graphics to develop the * initial release of the Radeon 8500 driver under the XFree86 license. * This notice must be preserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * Authors: * Keith Whitwell <keith@tungstengraphics.com> * Eric Anholt <anholt@FreeBSD.org> * Leif Delgass <ldelgass@retinalburn.net> */ #include "drmP.h" #include "drm.h" #include "mach64_drm.h" #include "mach64_drv.h" irqreturn_t mach64_driver_irq_handler(DRM_IRQ_ARGS) { struct drm_device *dev = arg; drm_mach64_private_t *dev_priv = dev->dev_private; int status; status = MACH64_READ(MACH64_CRTC_INT_CNTL); /* VBLANK interrupt */ if (status & MACH64_CRTC_VBLANK_INT) { /* Mask off all interrupt ack bits before setting the ack bit, since * there may be other handlers outside the DRM. * * NOTE: On mach64, you need to keep the enable bits set when doing * the ack, despite what the docs say about not acking and enabling * in a single write. */ MACH64_WRITE(MACH64_CRTC_INT_CNTL, (status & ~MACH64_CRTC_INT_ACKS) | MACH64_CRTC_VBLANK_INT); atomic_inc(&dev_priv->vbl_received); drm_handle_vblank(dev, 0); return IRQ_HANDLED; } return IRQ_NONE; } u32 mach64_get_vblank_counter(struct drm_device * dev, int crtc) { const drm_mach64_private_t *const dev_priv = dev->dev_private; if (crtc != 0) { return 0; } return atomic_read(&dev_priv->vbl_received); } int mach64_enable_vblank(struct drm_device * dev, int crtc) { drm_mach64_private_t *dev_priv = dev->dev_private; u32 status = MACH64_READ(MACH64_CRTC_INT_CNTL); if (crtc != 0) { DRM_ERROR("tried to enable vblank on non-existent crtc %d\n", crtc); return 0; } DRM_DEBUG("before enable vblank CRTC_INT_CTNL: 0x%08x\n", status); /* Turn on VBLANK interrupt */ MACH64_WRITE(MACH64_CRTC_INT_CNTL, MACH64_READ(MACH64_CRTC_INT_CNTL) | MACH64_CRTC_VBLANK_INT_EN); return 0; } void mach64_disable_vblank(struct drm_device * dev, int crtc) { drm_mach64_private_t *dev_priv = dev->dev_private; u32 status = MACH64_READ(MACH64_CRTC_INT_CNTL); DRM_DEBUG("before disable vblank CRTC_INT_CTNL: 0x%08x\n", status); /* Disable and clear VBLANK interrupt */ MACH64_WRITE(MACH64_CRTC_INT_CNTL, (status & ~MACH64_CRTC_VBLANK_INT_EN) | MACH64_CRTC_VBLANK_INT); } /* drm_dma.h hooks */ void mach64_driver_irq_preinstall(struct drm_device * dev) { drm_mach64_private_t *dev_priv = dev->dev_private; u32 status = MACH64_READ(MACH64_CRTC_INT_CNTL); DRM_DEBUG("before install CRTC_INT_CTNL: 0x%08x\n", status); mach64_disable_vblank(dev,0); } int mach64_driver_irq_postinstall(struct drm_device * dev) { return drm_vblank_init(dev, 1); } void mach64_driver_irq_uninstall(struct drm_device * dev) { drm_mach64_private_t *dev_priv = dev->dev_private; if (!dev_priv) return; mach64_disable_vblank(dev, 0); DRM_DEBUG("after uninstall CRTC_INT_CTNL: 0x%08x\n", MACH64_READ(MACH64_CRTC_INT_CNTL)); }