From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?B?Tm9yYWxmIFRyw7hubmVz?= Date: Thu, 22 Jan 2015 20:58:38 +0000 Subject: Re: fbcon gives mirrored fonts on monochrome display Message-Id: <54C1647E.7030201@tronnes.org> List-Id: References: <54C145B8.6080204@tronnes.org> In-Reply-To: <54C145B8.6080204@tronnes.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit To: linux-fbdev@vger.kernel.org Den 22.01.2015 21:42, skrev Geert Uytterhoeven: > Hi Noralf, > > On Thu, Jan 22, 2015 at 9:38 PM, Noralf Trønnes wrote: >> Den 22.01.2015 20:59, skrev Geert Uytterhoeven: >>> On Thu, Jan 22, 2015 at 8:55 PM, Noralf Trønnes wrote: >>>> Den 22.01.2015 20:44, skrev Geert Uytterhoeven: >>>>> On Thu, Jan 22, 2015 at 7:47 PM, Noralf Trønnes >>>>> wrote: >>>>>> I'm playing with a SSD1306 128x64 monochrome display and fbcon gives me >>>>>> mirrored fonts and some extra lines. >>>> $ zgrep CONFIG_FB_CFB_REV_PIXELS_IN_BYTE /proc/config.gz >>>> # CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set >>>> >>>>> Does your driver set FB_NONSTD_REV_PIX_IN_B? >>>> No it doesn't. I also tried setting it now, with no effect: >>>> info->var.nonstd = FB_NONSTD_REV_PIX_IN_B; >>> The latter only seems to matter if CONFIG_FB_CFB_REV_PIXELS_IN_BYTE >>> is set, so please try the config option first. >> >> $ zgrep CONFIG_FB_CFB_REV_PIXELS_IN_BYTE /proc/config.gz >> CONFIG_FB_CFB_REV_PIXELS_IN_BYTE=y >> >> $ dmesg >> [ 365.595787] nonstd = 2 >> >> It didn't change anything. >> >> I looked up the code that is affected by this change, and only the cbf*.c >> files use the rev/swap/shift functions from fb_draw.h >> I use the sys_* modules not cbf* > One more thing that's no longer in sync... > Ideally, the cfb* and sys* versions are identical, except that the former > operates on MMIO, and the latter on RAM. Ok, so I'm out of luck, unless I patch this up myself :-) (which didn't look very complicated btw, as you say they look very similar) Thanks for your help. Noralf.