From 159dde93692ef549a0b2012c9f25feb4df638c9c Mon Sep 17 00:00:00 2001 From: Ville Syrjala Date: Tue, 8 May 2007 00:39:47 -0700 Subject: atyfb: halve XCLK with Mobility and 32bit memory Laptops with Rage Mobility and 32bit memory interface seem to require halved XCLK to operate correctly. Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/aty/atyfb_base.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/video/aty') diff --git a/drivers/video/aty/atyfb_base.c b/drivers/video/aty/atyfb_base.c index b61ab3b4c922..ea67dd902d4e 100644 --- a/drivers/video/aty/atyfb_base.c +++ b/drivers/video/aty/atyfb_base.c @@ -2377,6 +2377,9 @@ static int __devinit aty_init(struct fb_info *info) /* for many chips, the mclk is 67 MHz for SDRAM, 63 MHz otherwise */ if (par->pll_limits.mclk == 67 && par->ram_type < SDRAM) par->pll_limits.mclk = 63; + /* Mobility + 32bit memory interface need halved XCLK. */ + if (M64_HAS(MOBIL_BUS) && par->ram_type == SDRAM32) + par->pll_limits.xclk = (par->pll_limits.xclk + 1) >> 1; } #endif -- cgit v1.2.1