* [PATCH] atyfb: force 29MHz xtal on G3 PowerBooks
@ 2007-08-25 9:13 Olaf Hering
2007-09-19 3:01 ` Benjamin Herrenschmidt
0 siblings, 1 reply; 2+ messages in thread
From: Olaf Hering @ 2007-08-25 9:13 UTC (permalink / raw)
To: linuxppc-dev, linux-kernel
The atyfb does not work on my 233MHz PowerBook with Mach64 LP, when the
kernel is booted from firmware. aty_ld_pll_ct() returns 0x22 and xtal
remains at 14.31818. When booted from MacOS, aty_ld_pll_ct() returns 0x3c
and xtal is changed to 29.498928.
Google indicates that all 4 PowerBook models need the higher value.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
--- a/drivers/video/aty/atyfb_base.c
+++ b/drivers/video/aty/atyfb_base.c
@@ -2411,7 +2411,7 @@ static int __devinit aty_init(struct fb_
diff1 = -diff1;
if (diff2 < 0)
diff2 = -diff2;
- if (diff2 < diff1) {
+ if (diff2 < diff1 || (M64_HAS(G3_PB_1024x768))) {
par->ref_clk_per = 1000000000000ULL / 29498928;
xtal = "29.498928";
}
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] atyfb: force 29MHz xtal on G3 PowerBooks
2007-08-25 9:13 [PATCH] atyfb: force 29MHz xtal on G3 PowerBooks Olaf Hering
@ 2007-09-19 3:01 ` Benjamin Herrenschmidt
0 siblings, 0 replies; 2+ messages in thread
From: Benjamin Herrenschmidt @ 2007-09-19 3:01 UTC (permalink / raw)
To: Olaf Hering; +Cc: linuxppc-dev, linux-kernel
On Sat, 2007-08-25 at 11:13 +0200, Olaf Hering wrote:
> The atyfb does not work on my 233MHz PowerBook with Mach64 LP, when the
> kernel is booted from firmware. aty_ld_pll_ct() returns 0x22 and xtal
> remains at 14.31818. When booted from MacOS, aty_ld_pll_ct() returns 0x3c
> and xtal is changed to 29.498928.
> Google indicates that all 4 PowerBook models need the higher value.
Seems to break it on my wallstreet first gen (M64 LG)
So NAK for now until we find out a better way.
Ben.
> Signed-off-by: Olaf Hering <olaf@aepfle.de>
>
> --- a/drivers/video/aty/atyfb_base.c
> +++ b/drivers/video/aty/atyfb_base.c
> @@ -2411,7 +2411,7 @@ static int __devinit aty_init(struct fb_
> diff1 = -diff1;
> if (diff2 < 0)
> diff2 = -diff2;
> - if (diff2 < diff1) {
> + if (diff2 < diff1 || (M64_HAS(G3_PB_1024x768))) {
> par->ref_clk_per = 1000000000000ULL / 29498928;
> xtal = "29.498928";
> }
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev
^ permalink raw reply [flat|nested] 2+ messages in thread
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2007-08-25 9:13 [PATCH] atyfb: force 29MHz xtal on G3 PowerBooks Olaf Hering
2007-09-19 3:01 ` Benjamin Herrenschmidt
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