Graphic issues (emulating VGA bios on IBM Maple)

Graphic issues (emulating VGA bios on IBM Maple)

[jean-francois simon]

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Hi,
I have ported the x86emu x86 emulator to IBM PIBS firmware on a Maple 
platform. I am now trying to emulate a PCI ATI RADEON RV100 VGA BIOS.  
It goes all the way and seems OK.  When I boot Linux , the card is 
recognized (it wasn't before), but the screen just flickers a couple of 
time.  I worry about the message:
"radeonfb: Retrieved PLL infos from BIOS" since I don't have a BIOS.  
And the radeon_base.c driver seems to be doing a bunch of them:
       /*
         * Check out if we have an X86 which gave us some PLL 
informations
         * and if yes, retrieve them
         */
        if (!force_measure_pll && rinfo->bios_seg) {
                u16 pll_info_block = BIOS_IN16(rinfo->fp_bios_start + 
0x30);

                rinfo->pll.sclk         = BIOS_IN16(pll_info_block + 
0x08);
                rinfo->pll.mclk         = BIOS_IN16(pll_info_block + 
0x0a);
                rinfo->pll.ref_clk      = BIOS_IN16(pll_info_block + 
0x0e);
                rinfo->pll.ref_div      = BIOS_IN16(pll_info_block + 
0x10);
                rinfo->pll.ppll_min     = BIOS_IN32(pll_info_block + 
0x12);
                rinfo->pll.ppll_max     = BIOS_IN32(pll_info_block + 
0x16);

                printk(KERN_INFO "radeonfb: Retrieved PLL infos from 
BIOS\n");
                goto found;


The PLL values may be bogus..


Thanks for any help.
-jf simon


radeonfb_pci_register BEGIN
aper_base: 80000000 MC_FB_LOC to: 83ff8000, MC_AGP_LOC to: ffff9000
radeonfb (0000:02:01.0): Found 32768k of DDR 64 bits wide videoram
radeonfb (0000:02:01.0): mapped 16384k videoram
radeonfb: Found Intel x86 BIOS ROM Image
radeonfb: No ATY,RefCLK property !
radeonfb: Retrieved PLL infos from BIOS
radeonfb: Reference=27.00 MHz (RefDiv=60) Memory=150.00 Mhz, 
System=150.00 MHz
radeonfb: PLL min 12000 max 35000
1 chips in connector info
 - chip 1 has 2 connectors
  * connector 0 of type 2 (CRT) : 2300
  * connector 1 of type 3 (DVI-I) : 3201
Starting monitor auto detection...
radeonfb: I2C (port 1) ... not found
radeonfb: I2C (port 2) ... not found
radeonfb: I2C (port 3) ... found CRT display
radeonfb: I2C (port 4) ... not found
radeon_probe_OF_head
radeonfb: I2C (port 2) ... not found
radeonfb: I2C (port 4) ... not found
radeon_probe_OF_head
radeonfb: I2C (port 3) ... found CRT display
radeonfb: Monitor 1 type CRT found
radeonfb: EDID probed
radeonfb: Monitor 2 type no found
hStart = 1328, hEnd = 1440, hTotal = 1688
vStart = 1025, vEnd = 1028, vTotal = 1066
h_total_disp = 0x9f00d2    hsync_strt_wid = 0xe053a
v_total_disp = 0x3ff0429           vsync_strt_wid = 0x30400
pixclock = 9259
freq = 10800
freq = 10800, PLL min = 12000, PLL max = 35000
ref_div = 60, ref_clk = 2700, output_freq = 21600
ref_div = 60, ref_clk = 2700, output_freq = 21600
post div = 0x1
fb_div = 0x1e0
ppll_div_3 = 0x101e0
Console: switching to colour frame buffer device 160x64
radeonfb (0000:02:01.0): ATI Radeon QY
radeonfb_pci_register END
kobject_register failed for radeonfb (-17)
Call Trace:
[C000000000BFFB60] [C00000000000E97C] .show_stack+0x68/0x1b4 
(unreliable)
[C000000000BFFC10] [C00000000017EC54] .kobject_register+0x5c/0x8c
[C000000000BFFCA0] [C0000000001FAAF0] .bus_add_driver+0x7c/0x1b4
[C000000000BFFD50] [C0000000001FBDC8] .driver_register+0xac/0xc8
[C000000000BFFDD0] [C00000000018D084] .__pci_register_driver+0x8c/0xdc
[C000000000BFFE60] [C0000000003CCC9C] .radeonfb_old_init+0x164/0x188
[C000000000BFFF00] [C00000000000929C] .init+0x258/0x3d0
[C000000000BFFF90] [C00000000001E848] .kernel_thread+0x4c/0x68
vga16fb: unable to map device
vga16fb: probe of vga16fb.0 failed with error -12

 		
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Re: Graphic issues (emulating VGA bios on IBM Maple)

[Michel Dänzer]

On Tue, 2006-10-10 at 22:36 +0200, jean-francois simon wrote:
> Hi,
> I have ported the x86emu x86 emulator to IBM PIBS firmware on a Maple 
> platform. I am now trying to emulate a PCI ATI RADEON RV100 VGA BIOS.  
> It goes all the way and seems OK.  When I boot Linux , the card is 
> recognized (it wasn't before), 

If the VGA BIOS POST works correctly, you should probably see some
output in VGA text mode. Do you?

> but the screen just flickers a couple of time.  I worry about the message:
> "radeonfb: Retrieved PLL infos from BIOS" since I don't have a BIOS.

It refers to the VGA BIOS.

> The PLL values may be bogus..

[...]

> radeonfb: Retrieved PLL infos from BIOS
> radeonfb: Reference=27.00 MHz (RefDiv=60) Memory=150.00 Mhz, 
> System=150.00 MHz
> radeonfb:
>  PLL min 12000 max 35000

These look sane.

> radeonfb: I2C (port 3) ... found CRT display
> radeonfb: Monitor 1 type CRT found
> radeonfb: EDID probed
> radeonfb: Monitor 2 type no found

Is this correct?

> hStart = 1328, hEnd = 1440, hTotal = 1688
> vStart = 1025, vEnd = 1028, vTotal = 1066

Does the monitor support this mode?

> kobject_register failed for radeonfb (-17)
> Call Trace:
> [C000000000BFFB60] [C00000000000E97C] .show_stack+0x68/0x1b4 
> (unreliable)
> [C000000000BFFC10] [C00000000017EC54] .kobject_register+0x5c/0x8c
> [C000000000BFFCA0] [C0000000001FAAF0] .bus_add_driver+0x7c/0x1b4
> [C000000000BFFD50] [C0000000001FBDC8] .driver_register+0xac/0xc8
> [C000000000BFFDD0] [C00000000018D084] .__pci_register_driver+0x8c/0xdc
> [C000000000BFFE60] [C0000000003CCC9C] .radeonfb_old_init+0x164/0x188
> [C000000000BFFF00] [C00000000000929C] .init+0x258/0x3d0
> [C000000000BFFF90] [C00000000001E848] .kernel_thread+0x4c/0x68

Could this be the problem?


-- 
Earthling Michel Dänzer           |          http://tungstengraphics.com
Libre software enthusiast         |          Debian, X and DRI developer

Re: Graphic issues (emulating VGA bios on IBM Maple)

[jf simon]

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>>I have ported the x86emu x86 emulator to IBM PIBS firmware on a Maple 
>>platform. I am now trying to emulate a PCI ATI RADEON RV100 VGA BIOS.  
>>It goes all the way and seems OK.  When I boot Linux , the card is 
>>recognized (it wasn't before), 
>>    
>>
>
>If the VGA BIOS POST works correctly, you should probably see some
>output in VGA text mode. Do you?
>  
>
No can do. The Maple platform can't generate any PCI memory access below 
0x8000.0000. So it can't access  the VGA buffer. I have removed all 
these accesses from being generated by the emulator. (all other acceses 
to the card, including  PCI I/O accesses  to the VGA registers remain 
though).
I am looking at the radeon driver. Maybe it is confused as it thinks it 
is running on an OF based machine while at the same time locates a x86 
VGA BIOS.
-jfs



	

	
		
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Re: Graphic issues (emulating VGA bios on IBM Maple)

[Benjamin Herrenschmidt]

> [C000000000BFFE60] [C0000000003CCC9C] .radeonfb_old_init+0x164/0x188

Try getting rid of the old radeonfb and see if that works.

Ben.

Re: Graphic issues (emulating VGA bios on IBM Maple)

[jf simon]

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Benjamin Herrenschmidt wrote:

>>[C000000000BFFE60] [C0000000003CCC9C] .radeonfb_old_init+0x164/0x188
>>    
>>
>
>Try getting rid of the old radeonfb and see if that works.
>
>Ben.
>
>
>  
>
Thanks. It is now working. I have X running on my screen now.
-jfs


	

	
		
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