From: Jean-Francois Moine <moinejf@free.fr>
Date: Thu Nov 15 18:14:43 CET 2012

Stop the dovefb irq's after video display

This patch is to be applied to René van Dorst's linux kernel

	git://github.com/vDorst/linux.git

branch
	CuBox-v3.5.7-Patched

diff --git a/drivers/video/dovefb/dovefb_ovly.c b/drivers/video/dovefb/dovefb_ovly.c
index 68cfdd2..d640ac7 100644
--- a/drivers/video/dovefb/dovefb_ovly.c
+++ b/drivers/video/dovefb/dovefb_ovly.c
@@ -322,7 +322,7 @@ static int dovefb_ovly_ioctl(struct fb_info *fi, unsigned int cmd,
 {
 	void __user *argp = (void __user *)arg;
 	struct dovefb_layer_info *dfli = fi->par;
-	u32 x;
+	u32 x, irq_ena;
 	int vmode = 0;
 	int gfx_on = 1;
 	int vid_on = 1;
@@ -528,19 +528,19 @@ static int dovefb_ovly_ioctl(struct fb_info *fi, unsigned int cmd,
 	case DOVEFB_IOCTL_SWITCH_VID_OVLY:
 		if (copy_from_user(&vid_on, argp, sizeof(int)))
 			return -EFAULT;
+		x = readl(dfli->reg_base + LCD_SPU_DMA_CTRL0);
+		irq_ena = readl(dfli->reg_base + SPU_IRQ_ENA);
 		if (0 == vid_on) {
-			x = readl(dfli->reg_base + LCD_SPU_DMA_CTRL0) &
-				~CFG_DMA_ENA_MASK;
-			writel(x, dfli->reg_base + LCD_SPU_DMA_CTRL0);
+			x &= ~CFG_DMA_ENA_MASK;
+			irq_ena &= ~(DOVEFB_VID_INT_MASK | DOVEFB_VSYNC_INT_MASK);
 		} else {
-			x = readl(dfli->reg_base + LCD_SPU_DMA_CTRL0) |
-				CFG_DMA_ENA(0x1);
-			writel(x, dfli->reg_base + LCD_SPU_DMA_CTRL0);
+			x |= CFG_DMA_ENA(0x1);
+
 			/* Enable VID & VSync. */
-			x = readl(dfli->reg_base + SPU_IRQ_ENA) |
-				DOVEFB_VID_INT_MASK | DOVEFB_VSYNC_INT_MASK;
-			writel(x, dfli->reg_base + SPU_IRQ_ENA);
+			irq_ena |= DOVEFB_VID_INT_MASK | DOVEFB_VSYNC_INT_MASK;
 		}
+		writel(x, dfli->reg_base + LCD_SPU_DMA_CTRL0);
+		writel(irq_ena, dfli->reg_base + SPU_IRQ_ENA);
 		break;
 	case DOVEFB_IOCTL_SWITCH_GRA_OVLY:
 		if (copy_from_user(&gfx_on, argp, sizeof(int)))