Newer hardware (S3C6410, S5P) have the ability to block updates from shadow
registers during reconfiguration. Add protect calls for set_par and clear
protection when resetting.
Signed-off-by: Pawel Osciak <p.osciak@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/video/s3c-fb.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c
index 2173869..b10d16d 100644
--- a/drivers/video/s3c-fb.c
+++ b/drivers/video/s3c-fb.c
@@ -450,6 +450,8 @@ static int s3c_fb_set_par(struct fb_info *info)
dev_dbg(sfb->dev, "setting framebuffer parameters\n");
+ shadow_protect_win(win, 1);
+
switch (var->bits_per_pixel) {
case 32:
case 24:
@@ -632,6 +634,8 @@ static int s3c_fb_set_par(struct fb_info *info)
writel(data, regs + sfb->variant.wincon + (win_no * 4));
writel(0x0, regs + sfb->variant.winmap + (win_no * 4));
+ shadow_protect_win(win, 0);
+
return 0;
}
@@ -1228,11 +1232,14 @@ static int __devinit s3c_fb_probe_win(struct s3c_fb *sfb, unsigned int win_no,
static void s3c_fb_clear_win(struct s3c_fb *sfb, int win)
{
void __iomem *regs = sfb->regs;
+ u32 reg;
writel(0, regs + sfb->variant.wincon + (win * 4));
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);
}
static int __devinit s3c_fb_probe(struct platform_device *pdev)
--
1.7.1.569.g6f426
--
To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
