From: Arnaud Patard 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 Signed-off-by: Andrew Morton --- drivers/video/s3c2410fb.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff -puN drivers/video/s3c2410fb.c~s3c2410fb-fix-resume drivers/video/s3c2410fb.c --- devel/drivers/video/s3c2410fb.c~s3c2410fb-fix-resume 2006-05-27 23:18:22.000000000 -0700 +++ devel-akpm/drivers/video/s3c2410fb.c 2006-05-27 23:18:22.000000000 -0700 @@ -641,6 +641,7 @@ static int __init s3c2410fb_probe(struct 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 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 platf 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 plat 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 _