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authorArnaud Patard <arnaud.patard@rtp-net.org>2006-06-26 00:26:45 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-26 09:58:31 -0700
commit6931a764e1cff26c59be23fbde94cd51fe96bf42 (patch)
tree2a2b66ca3cd1d73a022ee43665d514d8c3a2957f /drivers/video/s3c2410fb.c
parentc72755b3bdcf551dcfb1d061c8f09fc243e28f49 (diff)
downloadlinux-6931a764e1cff26c59be23fbde94cd51fe96bf42.tar.bz2
[PATCH] s3c2410fb: Fix resume
regs.lcdcon1 was not updated on suspend. The result was a garbaged display on resume. This bug was first noticed by Christer Weinigel. This patch is a modified version of the one he sent to me. Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/video/s3c2410fb.c')
-rw-r--r--drivers/video/s3c2410fb.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/video/s3c2410fb.c b/drivers/video/s3c2410fb.c
index 9451932fbaf2..fbc411850686 100644
--- a/drivers/video/s3c2410fb.c
+++ b/drivers/video/s3c2410fb.c
@@ -641,6 +641,7 @@ static int __init s3c2410fb_probe(struct platform_device *pdev)
int ret;
int irq;
int i;
+ u32 lcdcon1;
mach_info = pdev->dev.platform_data;
if (mach_info == NULL) {
@@ -672,6 +673,11 @@ static int __init s3c2410fb_probe(struct platform_device *pdev)
memcpy(&info->regs, &mach_info->regs, sizeof(info->regs));
+ /* Stop the video and unset ENVID if set */
+ info->regs.lcdcon1 &= ~S3C2410_LCDCON1_ENVID;
+ lcdcon1 = readl(S3C2410_LCDCON1);
+ writel(lcdcon1 & ~S3C2410_LCDCON1_ENVID, S3C2410_LCDCON1);
+
info->mach_info = pdev->dev.platform_data;
fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
@@ -794,15 +800,14 @@ dealloc_fb:
* shutdown the lcd controller
*/
-static void s3c2410fb_stop_lcd(void)
+static void s3c2410fb_stop_lcd(struct s3c2410fb_info *fbi)
{
unsigned long flags;
- unsigned long tmp;
local_irq_save(flags);
- tmp = readl(S3C2410_LCDCON1);
- writel(tmp & ~S3C2410_LCDCON1_ENVID, S3C2410_LCDCON1);
+ fbi->regs.lcdcon1 &= ~S3C2410_LCDCON1_ENVID;
+ writel(fbi->regs.lcdcon1, S3C2410_LCDCON1);
local_irq_restore(flags);
}
@@ -816,7 +821,7 @@ static int s3c2410fb_remove(struct platform_device *pdev)
struct s3c2410fb_info *info = fbinfo->par;
int irq;
- s3c2410fb_stop_lcd();
+ s3c2410fb_stop_lcd(info);
msleep(1);
s3c2410fb_unmap_video_memory(info);
@@ -844,7 +849,7 @@ static int s3c2410fb_suspend(struct platform_device *dev, pm_message_t state)
struct fb_info *fbinfo = platform_get_drvdata(dev);
struct s3c2410fb_info *info = fbinfo->par;
- s3c2410fb_stop_lcd();
+ s3c2410fb_stop_lcd(info);
/* sleep before disabling the clock, we need to ensure
* the LCD DMA engine is not going to get back on the bus