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authorLars-Peter Clausen <lars@metafoo.de>2010-02-08 23:36:18 +0000
committerLars-Peter Clausen <lars@metafoo.de>2010-02-08 23:36:18 +0000
commit7c8f9f56301c4d6a6e3bcfc89e407dc5289f5b42 (patch)
tree261745eac1dc4083fad02efd0f88fd189fc9f91f /target/linux
parent6f3db147b68d6cb6557f6857b90bf6c67afbcf1f (diff)
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jz4740_fb: Do not disable lcd clock during blanking. Only during suspend.
SVN-Revision: 19561
Diffstat (limited to 'target/linux')
-rw-r--r--target/linux/xburst/files-2.6.32/drivers/video/jz4740_fb.c51
1 files changed, 42 insertions, 9 deletions
diff --git a/target/linux/xburst/files-2.6.32/drivers/video/jz4740_fb.c b/target/linux/xburst/files-2.6.32/drivers/video/jz4740_fb.c
index 7aac458a3b..ec4fe6d18e 100644
--- a/target/linux/xburst/files-2.6.32/drivers/video/jz4740_fb.c
+++ b/target/linux/xburst/files-2.6.32/drivers/video/jz4740_fb.c
@@ -167,12 +167,11 @@ int jzfb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue,
static int jzfb_get_controller_bpp(struct jzfb *jzfb)
{
switch(jzfb->pdata->bpp) {
- case 18:
- case 24:
- return 32;
- break;
- default:
- return jzfb->pdata->bpp;
+ case 18:
+ case 24:
+ return 32;
+ default:
+ return jzfb->pdata->bpp;
}
}
@@ -305,7 +304,7 @@ static int jzfb_set_par(struct fb_info *info)
static int jzfb_blank(int blank_mode, struct fb_info *info)
{
struct jzfb* jzfb = info->par;
- uint32_t ctrl = readl(jzfb->base + JZ_REG_LCD_CTRL);
+ uint32_t ctrl;
switch (blank_mode) {
case FB_BLANK_UNBLANK:
@@ -313,13 +312,13 @@ static int jzfb_blank(int blank_mode, struct fb_info *info)
return 0;
jz_gpio_bulk_resume(jz_lcd_pins, ARRAY_SIZE(jz_lcd_pins));
- clk_enable(jzfb->ldclk);
clk_enable(jzfb->lpclk);
writel(0, jzfb->base + JZ_REG_LCD_STATE);
writel(jzfb->framedesc->next, jzfb->base + JZ_REG_LCD_DA0);
+ ctrl = readl(jzfb->base + JZ_REG_LCD_CTRL);
ctrl |= JZ_LCD_CTRL_ENABLE;
ctrl &= ~JZ_LCD_CTRL_DISABLE;
writel(ctrl, jzfb->base + JZ_REG_LCD_CTRL);
@@ -330,6 +329,7 @@ static int jzfb_blank(int blank_mode, struct fb_info *info)
if (!jzfb->is_enabled)
return 0;
+ ctrl = readl(jzfb->base + JZ_REG_LCD_CTRL);
ctrl |= JZ_LCD_CTRL_DISABLE;
writel(ctrl, jzfb->base + JZ_REG_LCD_CTRL);
do {
@@ -337,7 +337,6 @@ static int jzfb_blank(int blank_mode, struct fb_info *info)
} while (!(ctrl & JZ_LCD_STATE_DISABLED));
clk_disable(jzfb->lpclk);
- clk_disable(jzfb->ldclk);
jz_gpio_bulk_suspend(jz_lcd_pins, ARRAY_SIZE(jz_lcd_pins));
jzfb->is_enabled = 0;
break;
@@ -511,6 +510,8 @@ static int __devinit jzfb_probe(struct platform_device *pdev)
fb_alloc_cmap(&fb->cmap, 256, 0);
+ clk_enable(jzfb->ldclk);
+
jzfb_set_par(fb);
writel(jzfb->framedesc->next, jzfb->base + JZ_REG_LCD_DA0);
@@ -547,12 +548,44 @@ static int __devexit jzfb_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM
+
+static int jzfb_suspend(struct device *dev)
+{
+ struct jzfb *jzfb = dev_get_drvdata(dev);
+ clk_disable(jzfb->ldclk);
+
+ return 0;
+}
+
+static int jzfb_resume(struct device *dev)
+{
+ struct jzfb *jzfb = dev_get_drvdata(dev);
+ clk_enable(jzfb->ldclk);
+
+ return 0;
+}
+
+static const struct dev_pm_ops jzfb_pm_ops = {
+ .suspend = jzfb_suspend,
+ .resume = jzfb_resume,
+ .poweroff = jzfb_suspend,
+ .restore = jzfb_resume,
+};
+
+#define JZFB_PM_OPS (&jzfb_pm_ops)
+
+#else
+#define JZFB_PM_OPS NULL
+#endif
+
static struct platform_driver jzfb_driver = {
.probe = jzfb_probe,
.remove = __devexit_p(jzfb_remove),
.driver = {
.name = "jz4740-fb",
+ .pm = JZFB_PM_OPS,
},
};