From: Max Staudt <mstaudt@xxxxxxx> 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit d50b3f43db739f03fcf8c0a00664b3d2fed0496e upstream. When using efifb with a 16-bit (5:6:5) visual, fbcon's text is rendered in the wrong colors - e.g. text gray (#aaaaaa) is rendered as green (#50bc50) and neighboring pixels have slightly different values (such as #50bc78). The reason is that fbcon loads its 16 color palette through efifb_setcolreg(), which in turn calculates a 32-bit value to write into memory for each palette index. Until now, this code could only handle 8-bit visuals and didn't mask overlapping values when ORing them. With this patch, fbcon displays the correct colors when a qemu VM is booted in 16-bit mode (in GRUB: "set gfxpayload=800x600x16"). Fixes: 7c83172b98e5 ("x86_64 EFI boot support: EFI frame buffer driver") # v2.6.24+ Signed-off-by: Max Staudt <mstaudt@xxxxxxx> Acked-By: Peter Jones <pjones@xxxxxxxxxx> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> --- drivers/video/efifb.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/video/efifb.c b/drivers/video/efifb.c index fcb950031246..dbd5fb207869 100644 --- a/drivers/video/efifb.c +++ b/drivers/video/efifb.c @@ -54,9 +54,9 @@ static int efifb_setcolreg(unsigned regno, unsigned red, unsigned green, return 1; if (regno < 16) { - red >>= 8; - green >>= 8; - blue >>= 8; + red >>= 16 - info->var.red.length; + green >>= 16 - info->var.green.length; + blue >>= 16 - info->var.blue.length; ((u32 *)(info->pseudo_palette))[regno] = (red << info->var.red.offset) | (green << info->var.green.offset) | -- 2.10.2 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html