diff options
| author | Max Staudt <mstaudt@suse.de> | 2016-06-13 19:15:59 +0200 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:58:59 +0200 |
| commit | fd46f2973cd17f742bbe1edc4c0a1dad5590d609 (patch) | |
| tree | 26afa1649b70470f2ae5d122f6155ef76719c94e /arch | |
| parent | e6ced5b08f85fd6105ec5040968b55d63258499c (diff) | |
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: 7c83172b98e5 ("x86_64 EFI boot support: EFI frame buffer driver") # v2.6.24+
Signed-off-by: Max Staudt <mstaudt@suse.de>
Acked-By: Peter Jones <pjones@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions