From 9e0efa63565511dc75846e6b036a4b80e92b9a98 Mon Sep 17 00:00:00 2001 From: Rob Clark Date: Sat, 30 Nov 2013 17:24:22 -0500 Subject: drm/msm: move irq utils to mdp_kms We'll want basically the same thing for mdp5, so refactor it out so it can be shared. Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/mdp/mdp_kms.c | 144 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 144 insertions(+) create mode 100644 drivers/gpu/drm/msm/mdp/mdp_kms.c (limited to 'drivers/gpu/drm/msm/mdp/mdp_kms.c') diff --git a/drivers/gpu/drm/msm/mdp/mdp_kms.c b/drivers/gpu/drm/msm/mdp/mdp_kms.c new file mode 100644 index 000000000000..3be48f7c36be --- /dev/null +++ b/drivers/gpu/drm/msm/mdp/mdp_kms.c @@ -0,0 +1,144 @@ +/* + * Copyright (C) 2013 Red Hat + * Author: Rob Clark + * + * 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 . + */ + + +#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); +} -- cgit v1.2.3