[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>

diff --git a/drivers/video/geode/video_gx.c b/drivers/video/geode/video_gx.c
index bee0741..7f3f18d 100644 (file)
--- a/drivers/video/geode/video_gx.c
+++ b/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

diff --git a/drivers/video/geode/video_gx.h b/drivers/video/geode/video_gx.h
index 119d0ab..ce28d8f 100644 (file)
--- a/drivers/video/geode/video_gx.h
+++ b/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