Max Staudt 2add76a428
fbdev/efifb: Fix 16 color palette entry calculation ...
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: 7c83172b98mstaudt@suse.de >
Acked-By: Peter Jones <pjones@redhat.com >
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com >
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
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2add76a428