soc/intel/skylake: Do a heci_reset before reading ME firmware version
This change adds a call to heci_reset before attempting to read ME firmware version. This is important to ensure that both ME and BIOS are in sync. BUG=b:76167737 BRANCH=poppy TEST=Verfied that ME firmware version read does not fail on first boot after power failure (i.e. removing battery and AC power). Change-Id: Ib6b39c398d2e1177b087352a4acb8bcf5a9897d6 Signed-off-by: Furquan Shaikh <furquan@google.com> Reviewed-on: https://review.coreboot.org/25362 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
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@ -254,6 +254,12 @@ static void print_me_version(void *unused)
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(hfs.fields.operation_mode != ME_HFS_MODE_NORMAL))
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goto failed;
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/*
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* It is important to do a heci_reset to ensure BIOS and ME are in sync
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* before reading firmware version.
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*/
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heci_reset();
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if (!heci_send(&fw_ver_msg, sizeof(fw_ver_msg), BIOS_HOST_ADD,
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HECI_MKHI_ADD))
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goto failed;
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