mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 00:01:35 +00:00
52440211dc
drm vblank initialization keeps track of the changes in driver-supplied frame counts across vt switch and mode setting, but only if you let it by not tearing down the drm vblank structure. Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
117 lines
3.4 KiB
C
117 lines
3.4 KiB
C
/* r128_irq.c -- IRQ handling for radeon -*- linux-c -*- */
|
|
/*
|
|
* Copyright (C) The Weather Channel, Inc. 2002. 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
|
|
* PRECISION INSIGHT 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>
|
|
*/
|
|
|
|
#include "drmP.h"
|
|
#include "drm.h"
|
|
#include "r128_drm.h"
|
|
#include "r128_drv.h"
|
|
|
|
u32 r128_get_vblank_counter(struct drm_device *dev, int crtc)
|
|
{
|
|
const drm_r128_private_t *dev_priv = dev->dev_private;
|
|
|
|
if (crtc != 0)
|
|
return 0;
|
|
|
|
return atomic_read(&dev_priv->vbl_received);
|
|
}
|
|
|
|
irqreturn_t r128_driver_irq_handler(DRM_IRQ_ARGS)
|
|
{
|
|
struct drm_device *dev = (struct drm_device *) arg;
|
|
drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private;
|
|
int status;
|
|
|
|
status = R128_READ(R128_GEN_INT_STATUS);
|
|
|
|
/* VBLANK interrupt */
|
|
if (status & R128_CRTC_VBLANK_INT) {
|
|
R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK);
|
|
atomic_inc(&dev_priv->vbl_received);
|
|
drm_handle_vblank(dev, 0);
|
|
return IRQ_HANDLED;
|
|
}
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
int r128_enable_vblank(struct drm_device *dev, int crtc)
|
|
{
|
|
drm_r128_private_t *dev_priv = dev->dev_private;
|
|
|
|
if (crtc != 0) {
|
|
DRM_ERROR("%s: bad crtc %d\n", __func__, crtc);
|
|
return -EINVAL;
|
|
}
|
|
|
|
R128_WRITE(R128_GEN_INT_CNTL, R128_CRTC_VBLANK_INT_EN);
|
|
return 0;
|
|
}
|
|
|
|
void r128_disable_vblank(struct drm_device *dev, int crtc)
|
|
{
|
|
if (crtc != 0)
|
|
DRM_ERROR("%s: bad crtc %d\n", __func__, crtc);
|
|
|
|
/*
|
|
* FIXME: implement proper interrupt disable by using the vblank
|
|
* counter register (if available)
|
|
*
|
|
* R128_WRITE(R128_GEN_INT_CNTL,
|
|
* R128_READ(R128_GEN_INT_CNTL) & ~R128_CRTC_VBLANK_INT_EN);
|
|
*/
|
|
}
|
|
|
|
void r128_driver_irq_preinstall(struct drm_device * dev)
|
|
{
|
|
drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private;
|
|
|
|
/* Disable *all* interrupts */
|
|
R128_WRITE(R128_GEN_INT_CNTL, 0);
|
|
/* Clear vblank bit if it's already high */
|
|
R128_WRITE(R128_GEN_INT_STATUS, R128_CRTC_VBLANK_INT_AK);
|
|
}
|
|
|
|
int r128_driver_irq_postinstall(struct drm_device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void r128_driver_irq_uninstall(struct drm_device * dev)
|
|
{
|
|
drm_r128_private_t *dev_priv = (drm_r128_private_t *) dev->dev_private;
|
|
if (!dev_priv)
|
|
return;
|
|
|
|
/* Disable *all* interrupts */
|
|
R128_WRITE(R128_GEN_INT_CNTL, 0);
|
|
}
|