This change adds support for configuring higher CD Clock frequencies for VGA SOL initialization during the Pre-Memory phase. This feature allows BIOS to request specific display core clock frequencies when VGA support is enabled during MRC training. The VgaInitControl field in IGPU_PEI_PREMEM_CONFIG has been extended to include BIT6-7 for CD Clock frequency selection: * 0: No higher CD Clock required * 1: 442 MHz * 2: 461 MHz BUG=b:458353982 TEST=Build and boot fatcat/lapis, verify display initialization. Change-Id: I82fae0d21bb83ed26aad73b830ed15fcd626a9ae Signed-off-by: Alok Agarwal <alok.agarwal@intel.com> Signed-off-by: Sowmya V <v.sowmya@intel.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/90795 Reviewed-by: Kapil Porwal <kapilporwal@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> |
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