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authorMark Brown <broonie@opensource.wolfsonmicro.com>2011-12-27 14:16:08 +0000
committerFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>2012-01-03 16:00:04 +0000
commita2b77dcebf6e968bada4d415d426b39ac199e8aa (patch)
tree438cdabf6d39f351b913a87f7bd64643dd5a5521 /drivers/video
parentfe05f8b1c3d28e6204a9ec54dec0d68af6cbf4c8 (diff)
video: s3c-fb: Use s3c_fb_enable() to enable the framebuffer
The s3c-fb driver has a function called s3c_fb_enable() which turns on and off the physical output. However it is only actually used in paths which disable the screen, the enabling just writes to the register. Make the code less confusing by ensuring that the enable also goes through the same path. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/s3c-fb.c55
1 files changed, 28 insertions, 27 deletions
diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c
index b1a75a024a2c..be4c218bb931 100644
--- a/drivers/video/s3c-fb.c
+++ b/drivers/video/s3c-fb.c
@@ -441,6 +441,32 @@ static void shadow_protect_win(struct s3c_fb_win *win, bool protect)
}
/**
+ * s3c_fb_enable() - Set the state of the main LCD output
+ * @sfb: The main framebuffer state.
+ * @enable: The state to set.
+ */
+static void s3c_fb_enable(struct s3c_fb *sfb, int enable)
+{
+ u32 vidcon0 = readl(sfb->regs + VIDCON0);
+
+ if (enable)
+ vidcon0 |= VIDCON0_ENVID | VIDCON0_ENVID_F;
+ else {
+ /* see the note in the framebuffer datasheet about
+ * why you cannot take both of these bits down at the
+ * same time. */
+
+ if (!(vidcon0 & VIDCON0_ENVID))
+ return;
+
+ vidcon0 |= VIDCON0_ENVID;
+ vidcon0 &= ~VIDCON0_ENVID_F;
+ }
+
+ writel(vidcon0, sfb->regs + VIDCON0);
+}
+
+/**
* s3c_fb_set_par() - framebuffer request to set new framebuffer state.
* @info: The framebuffer to change.
*
@@ -510,9 +536,10 @@ static int s3c_fb_set_par(struct fb_info *info)
if (sfb->variant.is_2443)
data |= (1 << 5);
- data |= VIDCON0_ENVID | VIDCON0_ENVID_F;
writel(data, regs + VIDCON0);
+ s3c_fb_enable(sfb, 1);
+
data = VIDTCON0_VBPD(var->upper_margin - 1) |
VIDTCON0_VFPD(var->lower_margin - 1) |
VIDTCON0_VSPW(var->vsync_len - 1);
@@ -761,32 +788,6 @@ static int s3c_fb_setcolreg(unsigned regno,
}
/**
- * s3c_fb_enable() - Set the state of the main LCD output
- * @sfb: The main framebuffer state.
- * @enable: The state to set.
- */
-static void s3c_fb_enable(struct s3c_fb *sfb, int enable)
-{
- u32 vidcon0 = readl(sfb->regs + VIDCON0);
-
- if (enable)
- vidcon0 |= VIDCON0_ENVID | VIDCON0_ENVID_F;
- else {
- /* see the note in the framebuffer datasheet about
- * why you cannot take both of these bits down at the
- * same time. */
-
- if (!(vidcon0 & VIDCON0_ENVID))
- return;
-
- vidcon0 |= VIDCON0_ENVID;
- vidcon0 &= ~VIDCON0_ENVID_F;
- }
-
- writel(vidcon0, sfb->regs + VIDCON0);
-}
-
-/**
* s3c_fb_blank() - blank or unblank the given window
* @blank_mode: The blank state from FB_BLANK_*
* @info: The framebuffer to blank.