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author | Timothy Pearson <tpearson@raptorengineering.com> | 2017-08-23 14:45:25 -0500 |
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committer | Timothy Pearson <tpearson@raptorengineering.com> | 2017-08-23 14:45:25 -0500 |
commit | fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204 (patch) | |
tree | 22962a4387943edc841c72a4e636a068c66d58fd /drivers/gpu/drm/via/via_video.c | |
download | ast2050-linux-kernel-fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204.zip ast2050-linux-kernel-fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204.tar.gz |
Initial import of modified Linux 2.6.28 tree
Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y
Diffstat (limited to 'drivers/gpu/drm/via/via_video.c')
-rw-r--r-- | drivers/gpu/drm/via/via_video.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/drivers/gpu/drm/via/via_video.c b/drivers/gpu/drm/via/via_video.c new file mode 100644 index 0000000..6ec04ac --- /dev/null +++ b/drivers/gpu/drm/via/via_video.c @@ -0,0 +1,93 @@ +/* + * 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("\n"); + + 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; + + if (!dev_priv->sarea_priv) + return; + + for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) { + lock = (volatile 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(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + drm_via_futex_t *fx = data; + 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("\n"); + + if (fx->lock > VIA_NR_XVMC_LOCKS) + return -EFAULT; + + lock = (volatile 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; +} |