From: Ville Syrjala Date: Tue, 8 May 2007 07:39:47 +0000 (-0700) Subject: atyfb: halve XCLK with Mobility and 32bit memory X-Git-Tag: upstream/snapshot3+hdmi~34217 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=159dde93692ef549a0b2012c9f25feb4df638c9c;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git 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 --- diff --git a/drivers/video/aty/atyfb_base.c b/drivers/video/aty/atyfb_base.c index b61ab3b..ea67dd9 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 diff --git a/include/video/mach64.h b/include/video/mach64.h index 09a7f4a..a8332e5 100644 --- a/include/video/mach64.h +++ b/include/video/mach64.h @@ -885,6 +885,7 @@ #define SDRAM 4 #define SGRAM 5 #define WRAM 6 +#define SDRAM32 6 #define DAC_INTERNAL 0x00 #define DAC_IBMRGB514 0x01