linux_dsm_epyc7002/drivers/gpu/drm/omapdrm/omap_irq.c
Thierry Reding 88e72717c2 drm/irq: Use unsigned int pipe in public API
This continues the pattern started in commit cc1ef118fc ("drm/irq:
Make pipe unsigned and name consistent"). This is applied to the public
APIs and driver callbacks, so pretty much all drivers need to be updated
to match the new prototypes.

Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Jianwei Wang <jianwei.wang.chn@gmail.com>
Cc: Alison Wang <alison.wang@freescale.com>
Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: David Airlie <airlied@linux.ie>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mark Yao <mark.yao@rock-chips.com>
Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Cc: Vincent Abriou <vincent.abriou@st.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-10-06 12:57:47 +02:00

283 lines
7.0 KiB
C

/*
* drivers/gpu/drm/omapdrm/omap_irq.c
*
* Copyright (C) 2012 Texas Instruments
* Author: Rob Clark <rob.clark@linaro.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "omap_drv.h"
static DEFINE_SPINLOCK(list_lock);
static void omap_irq_error_handler(struct omap_drm_irq *irq,
uint32_t irqstatus)
{
DRM_ERROR("errors: %08x\n", irqstatus);
}
/* call with list_lock and dispc runtime held */
static void omap_irq_update(struct drm_device *dev)
{
struct omap_drm_private *priv = dev->dev_private;
struct omap_drm_irq *irq;
uint32_t irqmask = priv->vblank_mask;
assert_spin_locked(&list_lock);
list_for_each_entry(irq, &priv->irq_list, node)
irqmask |= irq->irqmask;
DBG("irqmask=%08x", irqmask);
dispc_write_irqenable(irqmask);
dispc_read_irqenable(); /* flush posted write */
}
void __omap_irq_register(struct drm_device *dev, struct omap_drm_irq *irq)
{
struct omap_drm_private *priv = dev->dev_private;
unsigned long flags;
spin_lock_irqsave(&list_lock, flags);
if (!WARN_ON(irq->registered)) {
irq->registered = true;
list_add(&irq->node, &priv->irq_list);
omap_irq_update(dev);
}
spin_unlock_irqrestore(&list_lock, flags);
}
void omap_irq_register(struct drm_device *dev, struct omap_drm_irq *irq)
{
dispc_runtime_get();
__omap_irq_register(dev, irq);
dispc_runtime_put();
}
void __omap_irq_unregister(struct drm_device *dev, struct omap_drm_irq *irq)
{
unsigned long flags;
spin_lock_irqsave(&list_lock, flags);
if (!WARN_ON(!irq->registered)) {
irq->registered = false;
list_del(&irq->node);
omap_irq_update(dev);
}
spin_unlock_irqrestore(&list_lock, flags);
}
void omap_irq_unregister(struct drm_device *dev, struct omap_drm_irq *irq)
{
dispc_runtime_get();
__omap_irq_unregister(dev, irq);
dispc_runtime_put();
}
struct omap_irq_wait {
struct omap_drm_irq irq;
int count;
};
static DECLARE_WAIT_QUEUE_HEAD(wait_event);
static void wait_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
{
struct omap_irq_wait *wait =
container_of(irq, struct omap_irq_wait, irq);
wait->count--;
wake_up_all(&wait_event);
}
struct omap_irq_wait * omap_irq_wait_init(struct drm_device *dev,
uint32_t irqmask, int count)
{
struct omap_irq_wait *wait = kzalloc(sizeof(*wait), GFP_KERNEL);
wait->irq.irq = wait_irq;
wait->irq.irqmask = irqmask;
wait->count = count;
omap_irq_register(dev, &wait->irq);
return wait;
}
int omap_irq_wait(struct drm_device *dev, struct omap_irq_wait *wait,
unsigned long timeout)
{
int ret = wait_event_timeout(wait_event, (wait->count <= 0), timeout);
omap_irq_unregister(dev, &wait->irq);
kfree(wait);
if (ret == 0)
return -1;
return 0;
}
/**
* enable_vblank - enable vblank interrupt events
* @dev: DRM device
* @pipe: which irq to enable
*
* Enable vblank interrupts for @crtc. If the device doesn't have
* a hardware vblank counter, this routine should be a no-op, since
* interrupts will have to stay on to keep the count accurate.
*
* RETURNS
* Zero on success, appropriate errno if the given @crtc's vblank
* interrupt cannot be enabled.
*/
int omap_irq_enable_vblank(struct drm_device *dev, unsigned int pipe)
{
struct omap_drm_private *priv = dev->dev_private;
struct drm_crtc *crtc = priv->crtcs[pipe];
unsigned long flags;
DBG("dev=%p, crtc=%u", dev, pipe);
spin_lock_irqsave(&list_lock, flags);
priv->vblank_mask |= pipe2vbl(crtc);
omap_irq_update(dev);
spin_unlock_irqrestore(&list_lock, flags);
return 0;
}
/**
* disable_vblank - disable vblank interrupt events
* @dev: DRM device
* @pipe: which irq to enable
*
* Disable vblank interrupts for @crtc. If the device doesn't have
* a hardware vblank counter, this routine should be a no-op, since
* interrupts will have to stay on to keep the count accurate.
*/
void omap_irq_disable_vblank(struct drm_device *dev, unsigned int pipe)
{
struct omap_drm_private *priv = dev->dev_private;
struct drm_crtc *crtc = priv->crtcs[pipe];
unsigned long flags;
DBG("dev=%p, crtc=%u", dev, pipe);
spin_lock_irqsave(&list_lock, flags);
priv->vblank_mask &= ~pipe2vbl(crtc);
omap_irq_update(dev);
spin_unlock_irqrestore(&list_lock, flags);
}
static irqreturn_t omap_irq_handler(int irq, void *arg)
{
struct drm_device *dev = (struct drm_device *) arg;
struct omap_drm_private *priv = dev->dev_private;
struct omap_drm_irq *handler, *n;
unsigned long flags;
unsigned int id;
u32 irqstatus;
irqstatus = dispc_read_irqstatus();
dispc_clear_irqstatus(irqstatus);
dispc_read_irqstatus(); /* flush posted write */
VERB("irqs: %08x", irqstatus);
for (id = 0; id < priv->num_crtcs; id++) {
struct drm_crtc *crtc = priv->crtcs[id];
if (irqstatus & pipe2vbl(crtc))
drm_handle_vblank(dev, id);
}
spin_lock_irqsave(&list_lock, flags);
list_for_each_entry_safe(handler, n, &priv->irq_list, node) {
if (handler->irqmask & irqstatus) {
spin_unlock_irqrestore(&list_lock, flags);
handler->irq(handler, handler->irqmask & irqstatus);
spin_lock_irqsave(&list_lock, flags);
}
}
spin_unlock_irqrestore(&list_lock, flags);
return IRQ_HANDLED;
}
/*
* We need a special version, instead of just using drm_irq_install(),
* because we need to register the irq via omapdss. Once omapdss and
* omapdrm are merged together we can assign the dispc hwmod data to
* ourselves and drop these and just use drm_irq_{install,uninstall}()
*/
int omap_drm_irq_install(struct drm_device *dev)
{
struct omap_drm_private *priv = dev->dev_private;
struct omap_drm_irq *error_handler = &priv->error_handler;
int ret;
INIT_LIST_HEAD(&priv->irq_list);
dispc_runtime_get();
dispc_clear_irqstatus(0xffffffff);
dispc_runtime_put();
ret = dispc_request_irq(omap_irq_handler, dev);
if (ret < 0)
return ret;
error_handler->irq = omap_irq_error_handler;
error_handler->irqmask = DISPC_IRQ_OCP_ERR;
/* for now ignore DISPC_IRQ_SYNC_LOST_DIGIT.. really I think
* we just need to ignore it while enabling tv-out
*/
error_handler->irqmask &= ~DISPC_IRQ_SYNC_LOST_DIGIT;
omap_irq_register(dev, error_handler);
dev->irq_enabled = true;
return 0;
}
void omap_drm_irq_uninstall(struct drm_device *dev)
{
unsigned long irqflags;
int i;
if (!dev->irq_enabled)
return;
dev->irq_enabled = false;
/* Wake up any waiters so they don't hang. */
if (dev->num_crtcs) {
spin_lock_irqsave(&dev->vbl_lock, irqflags);
for (i = 0; i < dev->num_crtcs; i++) {
wake_up(&dev->vblank[i].queue);
dev->vblank[i].enabled = false;
dev->vblank[i].last =
dev->driver->get_vblank_counter(dev, i);
}
spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
}
dispc_free_irq(dev);
}