[PATCH 17/19] s3c-fb: Protect window-specific registers during updates
From: Pawel Osciak <hidden>
Date: 2010-07-09 08:50:05
Also in:
linux-fbdev, linux-samsung-soc
Subsystem:
framebuffer layer, the rest · Maintainers:
Helge Deller, Linus Torvalds
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 <redacted> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> --- 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)
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1.7.1.569.g6f426