ARM: versatile: support CLCD RGB565 layout with blue LSB

RGB565 with blue in the LSB wasn't supported.  Add support for this
layout.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-versatile/core.c b/arch/arm/mach-versatile/core.c
index 136c32e..2866c11 100644 (file)
--- a/arch/arm/mach-versatile/core.c
+++ b/arch/arm/mach-versatile/core.c
@@ -630,18 +630,22 @@ static void versatile_clcd_disable(struct clcd_fb *fb)
  */
 static void versatile_clcd_enable(struct clcd_fb *fb)
 {
+       struct fb_var_screeninfo *var = &fb->fb.var;
        void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
        u32 val;
 
        val = readl(sys_clcd);
        val &= ~SYS_CLCD_MODE_MASK;
 
-       switch (fb->fb.var.green.length) {
+       switch (var->green.length) {
        case 5:
                val |= SYS_CLCD_MODE_5551;
                break;
        case 6:
-               val |= SYS_CLCD_MODE_565_RLSB;
+               if (var->red.offset == 0)
+                       val |= SYS_CLCD_MODE_565_RLSB;
+               else
+                       val |= SYS_CLCD_MODE_565_BLSB;
                break;
        case 8:
                val |= SYS_CLCD_MODE_888;
@@ -709,10 +713,19 @@ static void versatile_clcd_remove(struct clcd_fb *fb)
                              fb->fb.screen_base, fb->fb.fix.smem_start);
 }
 
+static void versatile_clcd_decode(struct clcd_fb *fb, struct clcd_regs *regs)
+{
+       clcdfb_decode(fb, regs);
+
+       /* Always clear BGR for RGB565: we do the routing externally */
+       if (fb->fb.var.green.length == 6)
+               regs->cntl &= ~CNTL_BGR;
+}
+
 static struct clcd_board clcd_plat_data = {
        .name           = "Versatile",
        .check          = clcdfb_check,
-       .decode         = clcdfb_decode,
+       .decode         = versatile_clcd_decode,
        .disable        = versatile_clcd_disable,
        .enable         = versatile_clcd_enable,
        .setup          = versatile_clcd_setup,