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mb/google/brya/var/mithrax: Enable RTD3 for SSD to resolve S0ix issue

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Some SSDs block the CPU from reaching C10 during the S0ix suspend
without the RTD3 configuration. Add PCIe RTD3 support so NVMe gets
placed into D3 state when entering S0ix.

Enable and reset GPIOs are configured as per pin mapping in gpio.c.

BUG=b:391612392
TEST=Run suspend_stress_test on mithrax device and verify that the
device suspends to S0ix.

Change-Id: I5008ec5e153c3695b1d6aa1183515eba192deaa2
Signed-off-by: Pranava Y N <pranavayn@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/87060
Reviewed-by: Eric Lai <ericllai@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Jayvik Desai <jayvik@google.com>
This commit is contained in:
Pranava Y N 2025-04-01 17:27:32 +05:30 • committed by Subrata Banik
commit 807c9d0840
1 changed files with 9 additions and 0 deletions
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9
src/mainboard/google/brya/variants/mithrax/overridetree.cb
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@ -218,6 +218,15 @@ chip soc/intel/alderlake
device generic 0 on end
end
end #PCIE8 SD card
device ref pcie_rp9 on
chip soc/intel/common/block/pcie/rtd3
register "is_storage" = "true"
register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_D11)"
register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_B4)"
register "srcclk_pin" = "1"
device generic 0 on end
end
end #PCIE9-12 SSD
device ref i2c0 on
chip drivers/i2c/generic
register "hid" = ""RTL5682""