From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3735F419.EDA55028@loomer.com> Date: Sun, 09 May 1999 13:46:21 -0700 From: Hugh Caley Reply-To: hcaley@loomer.com MIME-Version: 1.0 To: linuxppc-dev@lists.linuxppc.org CC: Geert.Uytterhoeven@cs.kuleuven.ac.be, tmrini@ntplx.net, mike@twinpeaks.prc.com Subject: Re: atyfb and 8500+ATI RagePro Content-Type: text/plain; charset=us-ascii; x-mac-type="54455854"; x-mac-creator="4D4F5353" Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: As an FYI, 29498928 does work with my PB G3 Series 300mhz; I can boot with video=atyfb:vmode:14,cmode:32,mclk:83. Sometimes, though, the console speed is really slow, but if I boot and exit X, either Xpmac or XF68_FBDev, it becomes faster. Also, I am getting the little vertical snow band mentioned below when running X. I'm using a 2.2.8 kernel I built from CVS source from openprojects yesterday. Hugh "Timothy A. Seufert" wrote: > > At 4:48 PM +0200 5/6/99, Geert Uytterhoeven wrote: > >Hence the problem lies within the programming of the pixel and memory clocks. > > Could it be the same reference clock problem I was having? (I need to sit > down and write some code to parameterize the reference clock.) > > Mike, could you try the following change to atyfb.c? (without any other > patches applied): > > Find where ref_clk_per is defined. I don't have the source in front of me > at the moment, but it will look something like: > > unsigned long int ref_clk_per = 1000000000000UL/14318180; > > This line sets atyfb's notion of the frequency of the card's reference > clock (from which all others are derived) to 14.318180 MHz. Please try > changing 14318180 to 29498928 and 28636360 to get 29.499 and 28.636 MHz > respectively. > > I discovered that my Rage Pro card has a 29.498928 MHz reference clock, and > had some of the same symptoms as you (can't boot unless mclk is set low). > Once I set the reference clock to 29.499 MHz atyfb started working a lot > better (though I do get some snow in a thin vertical band near the left > side of the screen whenever video memory is being written). I received similar advice from Geert yesterday. Indeed it helps with my problem, as I too have a card with a reference clock at 29.498 Mhz. I also get the same small amount of snow down the penguin centerline during video activity. Since the initial success, I have noticed that with actual use, I have various problems (thin colored line at boot which goes away with the console, blanking and of the console display, etc.) so I think more remains to be done. I duplicated the DEBUG dump block so that I get a before and after picture of the card setup on boot: MacOS display is /bandit/ATY,XCLAIMVRPro atyfb: 3D RAGE PRO (BGA, PCI) [0x4749 rev 0x7c] 12M SGRAM, 230 MHz PLL, 100 Mhz MCLK BUS_CNTL DAC_CNTL MEM_CNTL EXT_MEM_CNTL CRTC_GEN_CNTL DSP_CONFIG DSP_ON_OFF 7b33a040 87010182 00651a7b 75130c01 03000200 0038064a 0118061f PLL ad d5 44 64 e4 13 80 91 8e 9e 29 01 a6 1b 00 00 BUS_CNTL DAC_CNTL MEM_CNTL EXT_MEM_CNTL CRTC_GEN_CNTL DSP_CONFIG DSP_ON_OFF 7b23a040 87010182 00751a7b 75130c01 03000200 003a0660 063500c0 PLL ad d5 41 14 dc 03 00 8a 8e 9e 29 01 a6 1b 00 00 Console: switching to colour frame buffer device 160x60 fb0: ATY Mach64 frame buffer device on /bandit/ATY,XCLAIMVRPro Monitor sense value = 0x73f, using video mode 6 and color mode 0. fb1: control display adapter mike. -- "Brain-eating mutants are bad for business..." - Battle Angel Hugh "Batmensch" Caley [[ This message was sent via the linuxppc-dev mailing list. Replies are ]] [[ not forced back to the list, so be sure to Cc linuxppc-dev if your ]] [[ reply is of general interest. Please check http://lists.linuxppc.org/ ]] [[ and http://www.linuxppc.org/ for useful information before posting. ]]