jz4740_fb: Disable lcd when it's blanked.

target/linux/xburst/files-2.6.31/drivers/video/backlight/gpm940b0.c

@@ -55,12 +55,14 @@ static int gpm940b0_set_power(struct lcd_device *lcd, int power)
 
 	switch (power) {
 	case FB_BLANK_UNBLANK:
+		mdelay(20);
 		gpm940b0->enabled = 1;
 		gpm940b0_power_enable(gpm940b0);
 		break;
 	default:
 		gpm940b0->enabled = 0;
 		gpm940b0_power_disable(gpm940b0);
+		mdelay(20);
 		break;
 	}
 	return 0;

target/linux/xburst/files-2.6.31/drivers/video/jz4740_fb.c

@@ -21,6 +21,9 @@
 #include <linux/jz4740_fb.h>
 
 #include <linux/delay.h>
+#include <linux/clk.h>
+
+#include <asm/mach-jz4740/gpio.h>
 
 #define JZ_REG_LCD_CFG		0x00
 #define JZ_REG_LCD_VSYNC	0x04
@@ -98,6 +101,8 @@
 
 #define JZ_LCD_SYNC_MASK 0x3ff
 
+#define JZ_LCD_STATE_DISABLED BIT(0)
+
 struct jzfb_framedesc {
 	uint32_t next;
 	uint32_t addr;
@@ -120,7 +125,11 @@ struct jzfb {
 	dma_addr_t vidmem_phys;
 	struct jzfb_framedesc *framedesc;
 
+	struct clk *ldclk;
+	struct clk *lpclk;
+
 	uint32_t pseudo_palette[16];
+	unsigned is_enabled:1;
 };
 
 static struct fb_fix_screeninfo jzfb_fix __devinitdata = {
@@ -133,6 +142,21 @@ static struct fb_fix_screeninfo jzfb_fix __devinitdata = {
 	.accel =	FB_ACCEL_NONE,
 };
 
+const static struct jz_gpio_bulk_request jz_lcd_pins[] = {
+	JZ_GPIO_BULK_PIN(LCD_PCLK),
+	JZ_GPIO_BULK_PIN(LCD_HSYNC),
+	JZ_GPIO_BULK_PIN(LCD_VSYNC),
+	JZ_GPIO_BULK_PIN(LCD_DATA0),
+	JZ_GPIO_BULK_PIN(LCD_DATA1),
+	JZ_GPIO_BULK_PIN(LCD_DATA2),
+	JZ_GPIO_BULK_PIN(LCD_DATA3),
+	JZ_GPIO_BULK_PIN(LCD_DATA4),
+	JZ_GPIO_BULK_PIN(LCD_DATA5),
+	JZ_GPIO_BULK_PIN(LCD_DATA6),
+	JZ_GPIO_BULK_PIN(LCD_DATA7),
+};
+
+
 int jzfb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue,
 			unsigned transp, struct fb_info *fb)
 {
@@ -278,6 +302,50 @@ static int jzfb_set_par(struct fb_info *info)
 	return 0;
 }
 
+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);
+
+	switch (blank_mode) {
+	case FB_BLANK_UNBLANK:
+		if (jzfb->is_enabled)
+			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 |= JZ_LCD_CTRL_ENABLE;
+		ctrl &= ~JZ_LCD_CTRL_DISABLE;
+		writel(ctrl, jzfb->base + JZ_REG_LCD_CTRL);
+
+		jzfb->is_enabled = 1;
+		break;
+	default:
+		if (!jzfb->is_enabled)
+			return 0;
+
+		ctrl |= JZ_LCD_CTRL_DISABLE;
+		writel(ctrl, jzfb->base + JZ_REG_LCD_CTRL);
+		do {
+			ctrl = readl(jzfb->base + JZ_REG_LCD_STATE);
+		} 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;
+	}
+
+	return 0;
+}
+
 
 static int jzfb_alloc_vidmem(struct jzfb *jzfb)
 {
@@ -339,7 +407,7 @@ static struct  fb_ops jzfb_ops = {
 	.owner = THIS_MODULE,
 	.fb_check_var = jzfb_check_var,
 	.fb_set_par = jzfb_set_par,
-/*	.fb_blank = jzfb_blank,*/
+	.fb_blank = jzfb_blank,
 	.fb_fillrect	= sys_fillrect,
 	.fb_copyarea	= sys_copyarea,
 	.fb_imageblit	= sys_imageblit,
@@ -390,6 +458,24 @@ static int __devinit jzfb_probe(struct platform_device *pdev)
 	jzfb->pdata = pdata;
 	jzfb->mem = mem;
 
+	jzfb->ldclk = clk_get(&pdev->dev, "lcd");
+	jzfb->lpclk = clk_get(&pdev->dev, "lcd_pclk");
+
+	jzfb->is_enabled = 1;
+
+	if (IS_ERR(jzfb->ldclk)) {
+		ret = PTR_ERR(jzfb->ldclk);
+		dev_err(&pdev->dev, "Faild to get device clock: %d\n", ret);
+		goto err_framebuffer_release;
+	}
+
+	if (IS_ERR(jzfb->lpclk)) {
+		ret = PTR_ERR(jzfb->ldclk);
+		dev_err(&pdev->dev, "Faild to get pixel clock: %d\n", ret);
+		goto err_framebuffer_release;
+	}
+
+
 	jzfb->base = ioremap(mem->start, resource_size(mem));
 
 	if (!jzfb->base) {
@@ -428,6 +514,8 @@ static int __devinit jzfb_probe(struct platform_device *pdev)
 	jzfb_set_par(fb);
 	writel(jzfb->framedesc->next, jzfb->base + JZ_REG_LCD_DA0);
 
+	jz_gpio_bulk_request(jz_lcd_pins, ARRAY_SIZE(jz_lcd_pins));
+
 	ret = register_framebuffer(fb);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to register framebuffer: %d\n", ret);
@@ -450,6 +538,7 @@ static int __devexit jzfb_remove(struct platform_device *pdev)
 {
 	struct jzfb *jzfb = platform_get_drvdata(pdev);
 
+	jz_gpio_bulk_free(jz_lcd_pins, ARRAY_SIZE(jz_lcd_pins));
 	iounmap(jzfb->base);
 	release_mem_region(jzfb->mem->start, resource_size(jzfb->mem));
 	jzfb_free_devmem(jzfb);

target/linux/xburst/patches-2.6.31/420-fb-notifier-pre-post.patch

@@ -0,0 +1,29 @@
+--- a/drivers/video/fbmem.c	2009-10-05 13:18:19.000000000 +0200
++++ b/drivers/video/fbmem.c	2009-12-03 05:08:15.000000000 +0100
+@@ -997,12 +997,12 @@
+ int
+ fb_blank(struct fb_info *info, int blank)
+ {	
+- 	int ret = -EINVAL;
++ 	int ret = 0;
+ 
+  	if (blank > FB_BLANK_POWERDOWN)
+  		blank = FB_BLANK_POWERDOWN;
+ 
+-	if (info->fbops->fb_blank)
++	if (info->fbops->fb_blank && blank == FB_BLANK_UNBLANK)
+  		ret = info->fbops->fb_blank(blank, info);
+ 
+  	if (!ret) {
+@@ -1013,6 +1013,10 @@
+ 		fb_notifier_call_chain(FB_EVENT_BLANK, &event);
+ 	}
+ 
++	if (info->fbops->fb_blank && blank != FB_BLANK_UNBLANK)
++ 		ret = info->fbops->fb_blank(blank, info);
++
++
+  	return ret;
+ }
+ 
+