sunxi: Configure only LVDS pins instead of all LCD pins when LVDS interface selected

The behavior before this patch would attempt to configure the mux
setting for pins 0 to 27 on PORTD to all be setting 3 for LVDS.  The
LVDS interface actually only uses pins 18 to 27 and not pins 0 to 27
as in the parallel LCD interface.  This patch restricts the
configuration to only the relevant pins 18 to 27 on PORTD.

This was tested on a sun8i A33 tablet with an LVDS screen.  MMC1 has
the capability to use pins 2 to 7 on PORTD and the mux on those pins
was being inadvertently set to setting 3 for MMC functionality which
this patch corrects.

Signed-off-by: Lawrence Yu <lyu@micile.com>
[hdegoede@redhat.com: Only apply this change to A23 / A33]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c
index 9fee66a2a450b84645e855e0a0c9fc7f4593112a..56f6c8e3497377653a076852875750e112813bb0 100644 (file)
--- a/drivers/video/sunxi_display.c
+++ b/drivers/video/sunxi_display.c
@@ -767,7 +767,11 @@ static void sunxi_lcdc_tcon0_mode_set(const struct ctfb_res_modes *mode,
                (struct sunxi_lcdc_reg *)SUNXI_LCD0_BASE;
        int bp, clk_delay, clk_div, clk_double, pin, total, val;
 
+#if defined CONFIG_MACH_SUN8I && defined CONFIG_VIDEO_LCD_IF_LVDS
+       for (pin = SUNXI_GPD(18); pin <= SUNXI_GPD(27); pin++) {
+#else
        for (pin = SUNXI_GPD(0); pin <= SUNXI_GPD(27); pin++) {
+#endif
 #ifdef CONFIG_VIDEO_LCD_IF_PARALLEL
                sunxi_gpio_set_cfgpin(pin, SUNXI_GPD_LCD0);
 #endif