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Build TF-A for the MediaTek MT7987 SoC family. Add necessary downstream patches in preparation for the BananaPi R4 Lite, which connects both flash chips to SPI2 and got broken MMC bus. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
25 lines
925 B
Diff
25 lines
925 B
Diff
From 0a09912eb336bee788443b919ea5b99b195f5a91 Mon Sep 17 00:00:00 2001
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From: Daniel Golle <daniel@makrotopia.org>
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Date: Sat, 4 Oct 2025 22:13:49 +0100
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Subject: [PATCH] hack: mt7987: mmc: use 4-bit bus-width for eMMC
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The BananaPi R4 Lite has broken DAT5 signal of the MMC bus, which
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results in 8-bit buswidth not working well for the eMMC.
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Reduce to 4-bit buswidth fixes it (and makes all other boards with
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eMMC a tiny bit slower to boot, but it's in the milliseconds).
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---
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plat/mediatek/mt7987/bl2/bl2_dev_mmc.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/plat/mediatek/mt7987/bl2/bl2_dev_mmc.c
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+++ b/plat/mediatek/mt7987/bl2/bl2_dev_mmc.c
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@@ -74,7 +74,7 @@ static const struct mt7987_msdc_conf {
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{
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.base = MSDC0_BASE,
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.top_base = MSDC0_TOP_BASE,
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- .bus_width = MMC_BUS_WIDTH_8,
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+ .bus_width = MMC_BUS_WIDTH_4,
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.type = MMC_IS_EMMC,
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.src_clk = 200000000,
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.dev_comp = &mt7987_msdc_compat,
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