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linux/drivers/video
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Max Staudt ef70fd11f5 fbdev/efifb: Fix 16 color palette entry calculation 
commit d50b3f43db 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: 7c83172b98 ("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: Ben Hutchings <ben@decadent.org.uk>
History 2017-02-23 03:53:53 +00:00
..
backlight This pull-request merely contains some very basic build/run-time bug fixes. 2014-06-12 12:45:50 -07:00
console framebuffer: fix border color 2014-11-17 14:11:46 +00:00
fbdev fbdev/efifb: Fix 16 color palette entry calculation 2017-02-23 03:53:53 +00:00
logo video/logo: prevent use of logos after they have been freed 2015-01-16 14:34:19 +00:00
display_timing.c video: add display_timing and videomode 2013-01-24 09:03:04 +01:00
hdmi.c video/hdmi: Rename HDMI_IDENTIFIER to HDMI_IEEE_OUI 2013-08-30 08:42:01 +10:00
Kconfig gpu: ipu-v3: Move i.MX IPUv3 core driver out of staging 2014-06-04 11:06:52 +02:00
Makefile video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
of_display_timing.c video: of: display_timing: fix default native-mode setting 2014-05-23 13:31:19 +03:00
of_videomode.c videomode: videomode_from_timing work 2013-03-21 14:34:33 +02:00
vgastate.c vga: vgastate fix 2007-05-08 11:15:32 -07:00
videomode.c videomode: videomode_from_timing work 2013-03-21 14:34:33 +02:00