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author | Dave Airlie <airlied@starflyer.(none)> | 2005-06-28 22:48:56 +1000 |
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committer | Dave Airlie <airlied@linux.ie> | 2005-06-28 22:48:56 +1000 |
commit | 22f579c621e2f264e6d093b07d75f99bc97d5df2 (patch) | |
tree | 6af70ad6c3a7bc7e1983281c2674d7880ca41559 /drivers/char/drm/via_video.c | |
parent | 99f95e5286df2f69edab8a04c7080d986ee4233b (diff) | |
download | linux-22f579c621e2f264e6d093b07d75f99bc97d5df2.tar.gz linux-22f579c621e2f264e6d093b07d75f99bc97d5df2.tar.bz2 linux-22f579c621e2f264e6d093b07d75f99bc97d5df2.zip |
drm: Add via unichrome support
Add DRM device driver for VIA Unichrome chipsets
From: Unichrome Project http://unichrome.sf.net, Erdi Chen, Thomas Hellstrom Signed-off-by: Dave Airlie <airlied@linux.ie>
Diffstat (limited to 'drivers/char/drm/via_video.c')
-rw-r--r-- | drivers/char/drm/via_video.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/drivers/char/drm/via_video.c b/drivers/char/drm/via_video.c new file mode 100644 index 000000000000..37a61c67b292 --- /dev/null +++ b/drivers/char/drm/via_video.c @@ -0,0 +1,97 @@ +/* + * Copyright 2005 Thomas Hellstrom. All Rights Reserved. + * + * 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, sub license, + * 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 NON-INFRINGEMENT. IN NO EVENT SHALL + * THE AUTHOR(S), AND/OR THE COPYRIGHT HOLDER(S) 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. + * + * Author: Thomas Hellstrom 2005. + * + * Video and XvMC related functions. + */ + +#include "drmP.h" +#include "via_drm.h" +#include "via_drv.h" + +void +via_init_futex(drm_via_private_t *dev_priv) +{ + unsigned int i; + + DRM_DEBUG("%s\n", __FUNCTION__); + + for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) { + DRM_INIT_WAITQUEUE(&(dev_priv->decoder_queue[i])); + XVMCLOCKPTR(dev_priv->sarea_priv, i)->lock = 0; + } +} + +void +via_cleanup_futex(drm_via_private_t *dev_priv) +{ +} + +void +via_release_futex(drm_via_private_t *dev_priv, int context) +{ + unsigned int i; + volatile int *lock; + + for (i=0; i < VIA_NR_XVMC_LOCKS; ++i) { + lock = (int *) XVMCLOCKPTR(dev_priv->sarea_priv, i); + if ( (_DRM_LOCKING_CONTEXT( *lock ) == context)) { + if (_DRM_LOCK_IS_HELD( *lock ) && (*lock & _DRM_LOCK_CONT)) { + DRM_WAKEUP( &(dev_priv->decoder_queue[i])); + } + *lock = 0; + } + } +} + +int +via_decoder_futex(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + drm_via_futex_t fx; + volatile int *lock; + drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; + drm_via_sarea_t *sAPriv = dev_priv->sarea_priv; + int ret = 0; + + DRM_DEBUG("%s\n", __FUNCTION__); + + DRM_COPY_FROM_USER_IOCTL(fx, (drm_via_futex_t *) data, sizeof(fx)); + + if (fx.lock > VIA_NR_XVMC_LOCKS) + return -EFAULT; + + lock = (int *)XVMCLOCKPTR(sAPriv, fx.lock); + + switch (fx.func) { + case VIA_FUTEX_WAIT: + DRM_WAIT_ON(ret, dev_priv->decoder_queue[fx.lock], + (fx.ms / 10) * (DRM_HZ / 100), *lock != fx.val); + return ret; + case VIA_FUTEX_WAKE: + DRM_WAKEUP(&(dev_priv->decoder_queue[fx.lock])); + return 0; + } + return 0; +} + |