9e0efa6356
We'll want basically the same thing for mdp5, so refactor it out so it can be shared. Signed-off-by: Rob Clark <robdclark@gmail.com>
144 lines
3.3 KiB
C
144 lines
3.3 KiB
C
/*
|
|
* Copyright (C) 2013 Red Hat
|
|
* Author: Rob Clark <robdclark@gmail.com>
|
|
*
|
|
* 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 "msm_drv.h"
|
|
#include "mdp_kms.h"
|
|
|
|
|
|
struct mdp_irq_wait {
|
|
struct mdp_irq irq;
|
|
int count;
|
|
};
|
|
|
|
static DECLARE_WAIT_QUEUE_HEAD(wait_event);
|
|
|
|
static DEFINE_SPINLOCK(list_lock);
|
|
|
|
static void update_irq(struct mdp_kms *mdp_kms)
|
|
{
|
|
struct mdp_irq *irq;
|
|
uint32_t irqmask = mdp_kms->vblank_mask;
|
|
|
|
BUG_ON(!spin_is_locked(&list_lock));
|
|
|
|
list_for_each_entry(irq, &mdp_kms->irq_list, node)
|
|
irqmask |= irq->irqmask;
|
|
|
|
mdp_kms->funcs->set_irqmask(mdp_kms, irqmask);
|
|
}
|
|
|
|
static void update_irq_unlocked(struct mdp_kms *mdp_kms)
|
|
{
|
|
unsigned long flags;
|
|
spin_lock_irqsave(&list_lock, flags);
|
|
update_irq(mdp_kms);
|
|
spin_unlock_irqrestore(&list_lock, flags);
|
|
}
|
|
|
|
void mdp_dispatch_irqs(struct mdp_kms *mdp_kms, uint32_t status)
|
|
{
|
|
struct mdp_irq *handler, *n;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&list_lock, flags);
|
|
mdp_kms->in_irq = true;
|
|
list_for_each_entry_safe(handler, n, &mdp_kms->irq_list, node) {
|
|
if (handler->irqmask & status) {
|
|
spin_unlock_irqrestore(&list_lock, flags);
|
|
handler->irq(handler, handler->irqmask & status);
|
|
spin_lock_irqsave(&list_lock, flags);
|
|
}
|
|
}
|
|
mdp_kms->in_irq = false;
|
|
update_irq(mdp_kms);
|
|
spin_unlock_irqrestore(&list_lock, flags);
|
|
|
|
}
|
|
|
|
void mdp_update_vblank_mask(struct mdp_kms *mdp_kms, uint32_t mask, bool enable)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&list_lock, flags);
|
|
if (enable)
|
|
mdp_kms->vblank_mask |= mask;
|
|
else
|
|
mdp_kms->vblank_mask &= ~mask;
|
|
update_irq(mdp_kms);
|
|
spin_unlock_irqrestore(&list_lock, flags);
|
|
}
|
|
|
|
static void wait_irq(struct mdp_irq *irq, uint32_t irqstatus)
|
|
{
|
|
struct mdp_irq_wait *wait =
|
|
container_of(irq, struct mdp_irq_wait, irq);
|
|
wait->count--;
|
|
wake_up_all(&wait_event);
|
|
}
|
|
|
|
void mdp_irq_wait(struct mdp_kms *mdp_kms, uint32_t irqmask)
|
|
{
|
|
struct mdp_irq_wait wait = {
|
|
.irq = {
|
|
.irq = wait_irq,
|
|
.irqmask = irqmask,
|
|
},
|
|
.count = 1,
|
|
};
|
|
mdp_irq_register(mdp_kms, &wait.irq);
|
|
wait_event(wait_event, (wait.count <= 0));
|
|
mdp_irq_unregister(mdp_kms, &wait.irq);
|
|
}
|
|
|
|
void mdp_irq_register(struct mdp_kms *mdp_kms, struct mdp_irq *irq)
|
|
{
|
|
unsigned long flags;
|
|
bool needs_update = false;
|
|
|
|
spin_lock_irqsave(&list_lock, flags);
|
|
|
|
if (!irq->registered) {
|
|
irq->registered = true;
|
|
list_add(&irq->node, &mdp_kms->irq_list);
|
|
needs_update = !mdp_kms->in_irq;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&list_lock, flags);
|
|
|
|
if (needs_update)
|
|
update_irq_unlocked(mdp_kms);
|
|
}
|
|
|
|
void mdp_irq_unregister(struct mdp_kms *mdp_kms, struct mdp_irq *irq)
|
|
{
|
|
unsigned long flags;
|
|
bool needs_update = false;
|
|
|
|
spin_lock_irqsave(&list_lock, flags);
|
|
|
|
if (irq->registered) {
|
|
irq->registered = false;
|
|
list_del(&irq->node);
|
|
needs_update = !mdp_kms->in_irq;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&list_lock, flags);
|
|
|
|
if (needs_update)
|
|
update_irq_unlocked(mdp_kms);
|
|
}
|