From: "Antonino A. Daplas" <adaplas@gmail.com>
To: Andrew Morton <akpm@osdl.org>
Cc: "Olaf Hering" <olaf@aepfle.de>,
"Linux Fbdev development list"
<linux-fbdev-devel@lists.sourceforge.net>,
"Ville Syrjälä" <syrjala@sci.fi>
Subject: [PATCH 08/12] atyfb: force 29MHz xtal on G3 PowerBooks
Date: Sat, 15 Sep 2007 08:05:20 +0800 [thread overview]
Message-ID: <46EB21C0.2050305@gmail.com> (raw)
From: Olaf Hering <olaf@aepfle.de>
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>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
---
drivers/video/aty/atyfb_base.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/video/aty/atyfb_base.c b/drivers/video/aty/atyfb_base.c
index abe0c43..440ecb7 100644
--- a/drivers/video/aty/atyfb_base.c
+++ b/drivers/video/aty/atyfb_base.c
@@ -2409,7 +2409,7 @@ #ifdef CONFIG_FB_ATY_CT
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";
}
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