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@xxxxxxxxxxx>
---
drivers/video/s3c-fb.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c
index 5f9d8e6..b5c2939 100644
--- a/drivers/video/s3c-fb.c
+++ b/drivers/video/s3c-fb.c
@@ -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)
--
1.7.1
--
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