video: simplefb: add rotation support

It introduces the way to rotate the screen for boards with rotated screen.

Signed-off-by: Takumi Sueda <puhitaku@gmail.com>

diff --git a/drivers/video/simplefb.c b/drivers/video/simplefb.c
index 2b0d883..235ec76 100644 (file)
--- a/drivers/video/simplefb.c
+++ b/drivers/video/simplefb.c
@@ -43,7 +43,11 @@ static int simple_video_probe(struct udevice *dev)
 
        uc_priv->xsize = fdtdec_get_uint(blob, node, "width", 0);
        uc_priv->ysize = fdtdec_get_uint(blob, node, "height", 0);
-       uc_priv->rot = 0;
+       uc_priv->rot = fdtdec_get_uint(blob, node, "rot", 0);
+       if (uc_priv->rot > 3) {
+               log_debug("%s: invalid rot\n", __func__);
+               return log_msg_ret("rot", -EINVAL);
+       }
 
        format = fdt_getprop(blob, node, "format", NULL);
        debug("%s: %dx%d@%s\n", __func__, uc_priv->xsize, uc_priv->ysize, format);