Re: fbcon gives mirrored fonts on monochrome display

Hi Noralf,

On Thu, Jan 22, 2015 at 7:47 PM, Noralf Trønnes [off-list ref] wrote:

I'm playing with a SSD1306 128x64 monochrome display and fbcon gives me
mirrored fonts and some extra lines.

fbdev config:
  info->var.bits_per_pixel = 1;
  info->fix.visual = FB_VISUAL_MONO10;
  info->var.red.length = 1;
  info->var.red.offset = 0;
  info->var.green.length = 1;
  info->var.green.offset = 0;
  info->var.blue.length = 1;
  info->var.blue.offset = 0;
Uses: sys_fillrect, sys_copyarea, sys_imageblit (and deferred_io)

System: Raspberry Pi, ARM, Linux 3.18.3

Does anyone see what this might be?

What's the value on CONFIG_FB_CFB_REV_PIXELS_IN_BYTE in your .config?
Does your driver set FB_NONSTD_REV_PIX_IN_B?

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds