baytrail: enable graphics turbo
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> Reviewed-on: http://review.coreboot.org/5050 Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
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@ -212,6 +212,10 @@ static const struct reg_script gfx_init_script[] = {
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REG_RES_WRITE32(PCI_BASE_ADDRESS_0, 0x9404, 0),
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REG_RES_WRITE32(PCI_BASE_ADDRESS_0, 0x9408, 0),
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REG_RES_WRITE32(PCI_BASE_ADDRESS_0, 0x940c, 0),
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/* Enable Gfx Turbo. */
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REG_IOSF_RMW(IOSF_PORT_PMC, SB_BIOS_CONFIG,
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~SB_BIOS_CONFIG_GFX_TURBO_DIS, 0),
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REG_SCRIPT_END
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};
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