Hi, On Friday, August 18, 2017 02:19:28 PM David Lechner wrote: > On 08/18/2017 01:21 PM, Geert Uytterhoeven wrote: > > Hi David, > > > > On Tue, Aug 1, 2017 at 6:35 PM, David Lechner <da...@lechnology.com> wrote: > >> This adds a new command line option to select the fbcon margin color. > >> > >> The motivation for this is screens where black does not blend into the > >> physical surroundings of the screen. For example, using an LCD (not the > >> backlit kind), white text on a black background is hard to read, so > >> inverting the colors is preferred. However, when you do this, most of the > >> screen is filled with white but the margins are still filled with black. > >> This makes a big, black, backwards 'L' on the screen. By setting > >> fbcon=margin:7, the margins will be filled with white and the LCD looks as > >> expected. > >> > >> Signed-off-by: David Lechner <da...@lechnology.com> > > > >> --- a/Documentation/fb/fbcon.txt > >> +++ b/Documentation/fb/fbcon.txt > >> @@ -148,6 +148,13 @@ C. Boot options > >> Actually, the underlying fb driver is totally ignorant of console > >> rotation. > >> > >> +5. fbcon=margin:<color> > >> + > >> + This option specifies the color of the margins. The margins are the > >> + leftover area at the right and the bottom of the screen that are > >> not > >> + used by text. By default, this area will be black. The 'color' > >> value > >> + is 0 to 7 where 0 is black and 7 is white. > >> + > > > > Given the standard console palette contains 16 colors, why limit this to > > the first 8 colors, and not 0 to 15? > > Good question. I think in some of my previous attempts there was a 0x7 > mask involved somewhere and this is a carryover from that. But, after > having looked at this again, I don't see a reason for limiting to 7.
Could you please prepare the incremental patch raising the number of colors possible to use? Best regards, -- Bartlomiej Zolnierkiewicz Samsung R&D Institute Poland Samsung Electronics
