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authorSubrata Banik <subratabanik@google.com>2024-08-19 12:24:22 +0000
committerSubrata Banik <subratabanik@google.com>2024-08-22 09:37:07 +0000
commitbdce399a124c519a58675470adc58085562b1a61 (patch)
tree6fc5f7cf5b87905c2022f1ca4eebca899e066d94 /util/nvramtool/Makefile.mk
parent4d00a5facc3962305d11297db9dc1c53da44f78e (diff)
soc/intel/alderlake: Refactor eSOL for late CSE sync text message
This patch extends the eSOL implementation on Alder Lake to render text messages during late CSE sync (from ramstage). Currently, the eSOL is limited to the early boot phase (until romstage) and only displays FSP-M memory training warnings or messages during early CSE sync (at romstage). Platforms like Nissa/Nirul and Trulo, which use CSE sync from ramstage, cannot display any eSOL messages, resulting in a brief black screen during CSE firmware updates. This patch implements the following logic to scale eSOL for late CSE sync (at ramstage) without recompiling eSOL code for ramstage: 1. During boot, check if the MRC cache is available. This indicates the need for memory/DRAM training and triggers an eSOL message. 2. For CSE lite SKUs (applicable to CrOS), leverage the `is_cse_fw_update_required` API to check if the current CSE RW firmware version differs from the CBFS metadata file version. If so, trigger an eSOL message indicating a CSE sync is required. 3. If either condition #1 and/or #2 is true, the AP firmware renders an eSOL text message using LibGfxInit for the Alder Lake platform. BUG=b:359814797 TEST=eSOL text messages are displayed during CSE sync and FSP updates. tirwen-rev3 ~ # elogtool list 0 | ... | Log area cleared | 4088 1 | ... | Early Sign of Life | MRC Early SOL Screen Shown 1 | ... | Early Sign of Life | CSE Sync Early SOL Screen Shown 2 | ... | System boot | 197 3 | ... | Memory Cache Update | Normal | Success 4 | ... | System boot | 198 5 | ... | Firmware Splash Screen | Enabled Change-Id: I1c7d4475ed5cf6888df1beebab0641ee4203b497 Signed-off-by: Subrata Banik <subratabanik@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/83975 Reviewed-by: Dinesh Gehlot <digehlot@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Pranava Y N <pranavayn@google.com>
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