From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/gpu/drm/msm/mdp/mdp_kms.c | 148 +++++++++++++++++++++++++++++++ 1 file changed, 148 insertions(+) create mode 100644 kernel/drivers/gpu/drm/msm/mdp/mdp_kms.c (limited to 'kernel/drivers/gpu/drm/msm/mdp/mdp_kms.c') diff --git a/kernel/drivers/gpu/drm/msm/mdp/mdp_kms.c b/kernel/drivers/gpu/drm/msm/mdp/mdp_kms.c new file mode 100644 index 000000000..1988c243f --- /dev/null +++ b/kernel/drivers/gpu/drm/msm/mdp/mdp_kms.c @@ -0,0 +1,148 @@ +/* + * 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; + + assert_spin_locked(&list_lock); + + list_for_each_entry(irq, &mdp_kms->irq_list, node) + irqmask |= irq->irqmask; + + mdp_kms->funcs->set_irqmask(mdp_kms, irqmask); +} + +/* if an mdp_irq's irqmask has changed, such as when mdp5 crtc<->encoder + * link changes, this must be called to figure out the new global irqmask + */ +void mdp_irq_update(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_timeout(wait_event, (wait.count <= 0), + msecs_to_jiffies(100)); + 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) + mdp_irq_update(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) + mdp_irq_update(mdp_kms); +} -- cgit 1.2.3-korg