soc/mediatek/mt8188: Initialize DPM in ramstage
Add initialization of DPM drvier for DRAM low power mode. DPM is an essential component on MediaTek SoC, so we initialize DPM in soc_init(). This DPM flow adds 22ms to the boot time. coreboot logs: CBFS: Found 'dpm.dm' @0x156c0 size 0xfc in mcache @0xfffdd110 mtk_init_mcu: Loaded (and reset) dpm.dm in 6 msecs (422 bytes) CBFS: Found 'dpm.pm' @0x15800 size 0x3c59 in mcache @0xfffdd140 mtk_init_mcu: Loaded (and reset) dpm.pm in 16 msecs (18910 bytes) TEST=build pass BUG=b:236331724 Signed-off-by: Xi Chen <xixi.chen@mediatek.corp-partner.google.com> Change-Id: I46baa7b49e90d53dd4d1d95af9c46622faf30419 Reviewed-on: https://review.coreboot.org/c/coreboot/+/66969 Reviewed-by: Yidi Lin <yidilin@google.com> Reviewed-by: Yu-Ping Wu <yupingso@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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@ -1,8 +1,10 @@
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/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
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#include <bootmem.h>
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#include <console/console.h>
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#include <device/device.h>
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#include <soc/dfd.h>
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#include <soc/dpm.h>
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#include <soc/emi.h>
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#include <soc/mcupm.h>
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#include <soc/mmu_operations.h>
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@ -26,6 +28,9 @@ static void soc_init(struct device *dev)
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mcupm_init();
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sspm_init();
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if (dpm_init())
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printk(BIOS_ERR, "dpm init failed, DVFS may not work\n");
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if (CONFIG(MTK_DFD))
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dfd_init();
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}
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