[PATCH] gxfb: Turn on the flatpanel power and data

For Geode devices without a flatpanel aware BIOS, this enables the flatpanel
power and data.
Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Acked-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/video/geode/video_gx.c

@@ -220,7 +220,13 @@ gx_configure_tft(struct fb_info *info)
 	/*  Set the dither control */
 	writel(0x70, par->vid_regs + GX_FP_DFC);
 
-	/* Turn on the device */
+	/* Enable the FP data and power (in case the BIOS didn't) */
+
+	fp = readl(par->vid_regs + GX_DCFG);
+	fp |= GX_DCFG_FP_PWR_EN | GX_DCFG_FP_DATA_EN;
+	writel(fp, par->vid_regs + GX_DCFG);
+
+	/* Unblank the panel */
 
 	fp = readl(par->vid_regs + GX_FP_PM);
 	fp |= GX_FP_PM_P;
@@ -245,9 +251,12 @@ static void gx_configure_display(struct fb_info *info)
 	writel(misc, par->vid_regs + GX_MISC);
 
 	/* Write the display configuration */
-
 	dcfg = readl(par->vid_regs + GX_DCFG);
 
+	/* Disable hsync and vsync */
+	dcfg &= ~(GX_DCFG_VSYNC_EN | GX_DCFG_HSYNC_EN);
+	writel(dcfg, par->vid_regs + GX_DCFG);
+
 	/* Clear bits from existing mode. */
 	dcfg &= ~(GX_DCFG_CRT_SYNC_SKW_MASK
 		  | GX_DCFG_CRT_HSYNC_POL   | GX_DCFG_CRT_VSYNC_POL

drivers/video/geode/video_gx.h

@@ -25,6 +25,8 @@ extern struct geode_vid_ops gx_vid_ops;
 #  define GX_DCFG_HSYNC_EN		0x00000002
 #  define GX_DCFG_VSYNC_EN		0x00000004
 #  define GX_DCFG_DAC_BL_EN		0x00000008
+#  define GX_DCFG_FP_PWR_EN		0x00000040
+#  define GX_DCFG_FP_DATA_EN		0x00000080
 #  define GX_DCFG_CRT_HSYNC_POL		0x00000100
 #  define GX_DCFG_CRT_VSYNC_POL		0x00000200
 #  define GX_DCFG_CRT_SYNC_SKW_MASK	0x0001C000