From 3b9d6a41b30241e9709e27b267ae1d5f154e4287 Mon Sep 17 00:00:00 2001
From: Yu-Ping Wu <yupingso@chromium.org>
Date: Tue, 19 Jul 2022 17:09:39 +0800
Subject: soc/mediatek/mt8195: Skip PCIe ops for eMMC SKUs

To avoid unnecessary PCIe early initialization for non-NVMe devices
(which would take about 150ms on dojo), skip setting PCIe ops when
initializing mt8195 SoC.

BUG=b:238850212
TEST=emerge-cherry coreboot
TEST=Dojo SKU1 (eMMC) boot time <= 1s
BRANCH=cherry

Change-Id: I8945890ba422c0c4eb42683935220b7afbb80dfd
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65993
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
---
 src/soc/mediatek/mt8195/soc.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/soc/mediatek/mt8195/soc.c b/src/soc/mediatek/mt8195/soc.c
index 002fcddf2e..1aec0ded71 100644
--- a/src/soc/mediatek/mt8195/soc.c
+++ b/src/soc/mediatek/mt8195/soc.c
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <bootmem.h>
+#include <console/console.h>
 #include <device/device.h>
 #include <device/pci.h>
 #include <soc/apusys.h>
@@ -58,8 +59,12 @@ static void enable_soc_dev(struct device *dev)
 {
 	if (dev->path.type == DEVICE_PATH_CPU_CLUSTER)
 		dev->ops = &soc_ops;
-	else if (dev->path.type == DEVICE_PATH_DOMAIN)
-		dev->ops = &pci_domain_ops;
+	else if (dev->path.type == DEVICE_PATH_DOMAIN) {
+		if (mainboard_needs_pcie_init())
+			dev->ops = &pci_domain_ops;
+		else
+			printk(BIOS_DEBUG, "Skip setting PCIe ops\n");
+	}
 }
 
 struct chip_operations soc_mediatek_mt8195_ops = {
-- 
cgit v1.2.3