From 2ba162b9335c6e3ba90c77637372fc9f078aae67 Mon Sep 17 00:00:00 2001
From: Eric Miao <eric.miao@marvell.com>
Date: Wed, 30 Apr 2008 00:52:24 -0700
Subject: [PATCH] pxafb: use completion for LCD disable wait code
Signed-off-by: eric miao <eric.miao@marvell.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
drivers/video/pxafb.c | 12 ++++--------
drivers/video/pxafb.h | 2 ++
2 files changed, 6 insertions(+), 8 deletions(-)
diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c
index 417561779ec2..a4ee7225fe2c 100644
--- a/drivers/video/pxafb.c
+++ b/drivers/video/pxafb.c
@@ -39,6 +39,7 @@
#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <linux/err.h>
+#include <linux/completion.h>
#include <asm/hardware.h>
#include <asm/io.h>
@@ -810,11 +811,6 @@ static void pxafb_disable_controller(struct pxafb_info *fbi)
{
uint32_t lccr0;
- DECLARE_WAITQUEUE(wait, current);
-
- set_current_state(TASK_UNINTERRUPTIBLE);
- add_wait_queue(&fbi->ctrlr_wait, &wait);
-
/* Clear LCD Status Register */
lcd_writel(fbi, LCSR, 0xffffffff);
@@ -822,8 +818,7 @@ static void pxafb_disable_controller(struct pxafb_info *fbi)
lcd_writel(fbi, LCCR0, lccr0);
lcd_writel(fbi, LCCR0, lccr0 | LCCR0_DIS);
- schedule_timeout(200 * HZ / 1000);
- remove_wait_queue(&fbi->ctrlr_wait, &wait);
+ wait_for_completion_timeout(&fbi->disable_done, 200 * HZ / 1000);
/* disable LCD controller clock */
clk_disable(fbi->clk);
@@ -840,7 +835,7 @@ static irqreturn_t pxafb_handle_irq(int irq, void *dev_id)
if (lcsr & LCSR_LDD) {
lccr0 = lcd_readl(fbi, LCCR0);
lcd_writel(fbi, LCCR0, lccr0 | LCCR0_LDM);
- wake_up(&fbi->ctrlr_wait);
+ complete(&fbi->disable_done);
}
lcd_writel(fbi, LCSR, lcsr);
@@ -1190,6 +1185,7 @@ static struct pxafb_info * __init pxafb_init_fbinfo(struct device *dev)
init_waitqueue_head(&fbi->ctrlr_wait);
INIT_WORK(&fbi->task, pxafb_task);
init_MUTEX(&fbi->ctrlr_sem);
+ init_completion(&fbi->disable_done);
return fbi;
}
diff --git a/drivers/video/pxafb.h b/drivers/video/pxafb.h
index b777641c5e70..f47f139fc5ed 100644
--- a/drivers/video/pxafb.h
+++ b/drivers/video/pxafb.h
@@ -114,6 +114,8 @@ struct pxafb_info {
wait_queue_head_t ctrlr_wait;
struct work_struct task;
+ struct completion disable_done;
+
#ifdef CONFIG_CPU_FREQ
struct notifier_block freq_transition;
struct notifier_block freq_policy;
--
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