From: Arnaud Patard Date: Mon, 26 Jun 2006 07:26:45 +0000 (-0700) Subject: [PATCH] s3c2410fb: Fix resume X-Git-Tag: v2.6.18-rc1~699 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6931a764e1cff26c59be23fbde94cd51fe96bf42;p=linux-2.6 [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/video/s3c2410fb.c b/drivers/video/s3c2410fb.c index 9451932fba..fbc4118506 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