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baytrail: enable graphics turbo

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Though the limited documentation indicates the default is
0 for the gfx_turbo_disable bit, in practice that isn't
true. Knock down the gfs_turbo_disable bit to enable
graphics turbo mode.

BUG=chrome-os-partner:25044
BRANCH=baytrail
TEST=Built and booted. Added debug code to output SB_BIOS_CONFIG.
     Noted that bit 7 was set to 0.

Change-Id: I11210c6a0b29765cb709a54d6ebd94211538807b
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/182640
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
This commit is contained in:
Aaron Durbin 2014-01-15 11:59:10 -06:00 • committed by chrome-internal-fetch
commit 3442ca432c
1 changed files with 4 additions and 0 deletions
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4
src/soc/intel/baytrail/gfx.c
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@ -212,6 +212,10 @@ static const struct reg_script gfx_init_script[] = {
REG_RES_WRITE32(PCI_BASE_ADDRESS_0, 0x9404, 0),
REG_RES_WRITE32(PCI_BASE_ADDRESS_0, 0x9408, 0),
REG_RES_WRITE32(PCI_BASE_ADDRESS_0, 0x940c, 0),
/* Enable Gfx Turbo. */
REG_IOSF_RMW(IOSF_PORT_PMC, SB_BIOS_CONFIG,
~SB_BIOS_CONFIG_GFX_TURBO_DIS, 0),
REG_SCRIPT_END
};