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video: s3c-fb: clear SHADOWCON register when clearing hardware window registers 

All bits of SHADOWCON register should be cleared when clearing
hardware window registers; however, some bits of SHADOWCON register
are not cleared previously.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
This commit is contained in:
Jingoo Han 2012-06-11 11:26:41 +09:00 committed by Florian Tobias Schandinat
parent 5fc05780b8
commit ecd57ae28e
1 changed files with 8 additions and 2 deletions
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drivers/video/s3c-fb.c
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@ -1348,8 +1348,14 @@ static void s3c_fb_clear_win(struct s3c_fb *sfb, int win)
writel(0, regs + VIDOSD_A(win, sfb->variant));
writel(0, regs + VIDOSD_B(win, sfb->variant));
writel(0, regs + VIDOSD_C(win, sfb->variant));
reg = readl(regs + SHADOWCON);
writel(reg & ~SHADOWCON_WINx_PROTECT(win), regs + SHADOWCON);
if (sfb->variant.has_shadowcon) {
reg = readl(sfb->regs + SHADOWCON);
reg &= ~(SHADOWCON_WINx_PROTECT(win) |
SHADOWCON_CHx_ENABLE(win) |
SHADOWCON_CHx_LOCAL_ENABLE(win));
writel(reg, sfb->regs + SHADOWCON);
}
}
static int __devinit s3c_fb_probe(struct platform_device *pdev)