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Commit 159dde93 authored by Ville Syrjala's avatar Ville Syrjala Committed by Linus Torvalds
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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: default avatarAntonino Daplas <adaplas@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b4e124c1

drivers/video/aty/atyfb_base.c

+3 −0
Original line number Diff line number Diff line
@@ -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

include/video/mach64.h

+1 −0
Original line number Diff line number Diff line
@@ -885,6 +885,7 @@ 
#define SDRAM			4

#define SGRAM			5

#define WRAM			6

#define SDRAM32			6



#define DAC_INTERNAL		0x00

#define DAC_IBMRGB514		0x01