From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 29 Oct 1999 01:58:06 -0600 From: Cort Dougan To: Geert Uytterhoeven Cc: Linux Frame Buffer Device Development , Linux/PPC Development , Jeff Garzik , Martin Mares Subject: Re: PPC scr_{read,write}w() cleanup (fwd) Message-ID: <19991029015806.A14709@chimaera.ppc.kernel.org> References: <19991028215345.A13930@chimaera.ppc.kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: ; from Geert Uytterhoeven on Fri, Oct 29, 1999 at 09:22:40AM +0200 Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: Maybe I'm confused. If so, point out where I'm wrong here: We build in VGA_CONSOLE and FB for a common build. We end up getting the wrong scr_read/write if we end up using the wrong one (through vt_buffer.h). Will vt_buffer.h "do the right thing" in this case? } What's the problem there? If vgacon is enabled, scr_write() will be writew(), } i.e. little endian. But since scr_readw() == readw() is little endian as well, } it'll work fine. } } Or am I missing something? } } > I'm willing to switch PReP to fb entirely if it's reasonable that it will } > work on all PReP boxes. Any suggestions? } } I don't think it will work on all PReP boxes yet. There's no frame buffer } device for S3 [89]6[48] yet :-( } } > } Does this work on your boxes? I really like to have this fixed. } > } } > } Finally I found some time to sort out the PPC scr_{read,write}w() mess. } > } Now scr_{read,write}w() always swaps bytes if {vga,mda}con was compiled in, } > } while we did a runtime check before. } > } } > } This patch matters specifically for people with PReP boxes, who may want to use } > } vgacon on one head and a real frame buffer device on either a second head or on } > } the first head after boot up (insmod *fb.o takes over vgacon). } } [...] } } Gr{oetje,eeting}s, } } Geert } } -- } Geert Uytterhoeven ----------------- Sony Suprastructure Center Europe (SUPC-E) } Geert.Uytterhoeven@sonycom.com ------------------- Sint-Stevens-Woluwestraat 55 } Phone +32-2-7248632 Fax +32-2-7262686 ---------------- B-1130 Brussels, Belgium ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/