pxafb: add transparency field to pxafb_mode_info struct

This allows to select either RGB565 (transparency 0) or RGBT555
(transparency 1) from the mode info

Signed-off-by: Pieter Grimmerink <p.grimmerink@inepro.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

2 files changed, 3 insertions, 1 deletions

diff --git a/arch/arm/mach-pxa/include/mach/pxafb.h b/arch/arm/mach-pxa/include/mach/pxafb.h
index f73061c90b5e..160ec83f51a6 100644
--- a/arch/arm/mach-pxa/include/mach/pxafb.h
+++ b/arch/arm/mach-pxa/include/mach/pxafb.h
@@ -76,7 +76,8 @@ struct pxafb_mode_info {
         u_char          bpp;
         u_int           cmap_greyscale:1,
                         depth:8,
-                        unused:23;
+                        transparency:1,
+                        unused:22;
 
         /* Parallel Mode Timing */
         u_char          hsync_len;
diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c
index 33a6aacfcbe3..f58a3aae6ea6 100644
--- a/drivers/video/pxafb.c
+++ b/drivers/video/pxafb.c
@@ -398,6 +398,7 @@ static void pxafb_setmode(struct fb_var_screeninfo *var,
         var->lower_margin       = mode->lower_margin;
         var->sync               = mode->sync;
         var->grayscale          = mode->cmap_greyscale;
+        var->transp.length      = mode->transparency;
 
         /* set the initial RGBA bitfields */
         pxafb_set_pixfmt(var, mode->depth);