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mb/google/rauru: Initialize DPM in ramstage

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Add initialization of DPM drvier for DRAM low power mode. This DPM flow
adds 3ms to the boot time, making the total boot time 860ms.

coreboot logs:
CBFS: Found 'dpm.dm' @0x19880 size 0x5b7 in mcache @0xfffdd1fc
mtk_init_mcu: Loaded (and reset) dpm.dm in 0 msecs (1888 bytes)
CBFS: Found 'dpm.pm' @0x19ec0 size 0x7fb5 in mcache @0xfffdd258
mtk_init_mcu: Loaded (and reset) dpm.pm in 3 msecs (43844 bytes)

TEST=Build pass. Check with cbmem -1.
BUG=b:317009620

Change-Id: Ib855e133a30067fc89c88d5c0fb454cc78504ff3
Signed-off-by: Crystal Guo <crystal.guo@mediatek.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/85122
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Jarried Lin 2024-11-01 15:22:04 +08:00 • committed by Yu-Ping Wu
commit 5f3a7d098e
1 changed files with 5 additions and 0 deletions
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5
src/mainboard/google/rauru/mainboard.c
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@ -1,8 +1,10 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.h>
#include <device/device.h>
#include <gpio.h>
#include <soc/bl31.h>
#include <soc/dpm_v2.h>
#include <soc/pcie.h>
#include <soc/usb.h>
@ -25,6 +27,9 @@ static void mainboard_init(struct device *dev)
setup_usb_host();
power_on_fpmcu();
if (dpm_init())
printk(BIOS_ERR, "dpm init failed, DVFS may not work\n");
if (CONFIG(ARM64_USE_ARM_TRUSTED_FIRMWARE))
register_reset_to_bl31(GPIO_AP_EC_WARM_RST_REQ.id, true);
}