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| author |   Max Staudt <mstaudt@suse.de> | 2016-06-13 19:15:59 +0200 |
|---|---|---|
| committer |   Tomi Valkeinen <tomi.valkeinen@ti.com> | 2016-08-11 17:54:56 +0300 |
| commit | d50b3f43db739f03fcf8c0a00664b3d2fed0496e (patch) | |
| tree | 0c8644cab0c1937ba4b0827c306aa97875a014ef /drivers/video/fbdev/bfin_adv7393fb.c | |
| parent | fbdev: Remove deprecated create_singlethread_workqueue (diff) | |
| download | linux-dev-d50b3f43db739f03fcf8c0a00664b3d2fed0496e.tar.xz linux-dev-d50b3f43db739f03fcf8c0a00664b3d2fed0496e.zip | |
fbdev/efifb: Fix 16 color palette entry calculation
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>
Cc: stable@vger.kernel.org
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video/fbdev/bfin_adv7393fb.c')
0 files changed, 0 insertions, 0 deletions