From 50aecccc3e6557b29e7a5d9a28f013fc68ebfb99 Mon Sep 17 00:00:00 2001 From: Chevron Li Date: Fri, 29 Jul 2022 03:05:24 -0700 Subject: [PATCH] mmc: sdhci-pci-o2micro: fix some SD cards compatibility issue at DDR50 mode Bayhub chips have better compatibility support for SDR50 than DDR50 and both mode have the same R/W performance when clock frequency >= 100MHz. Disable DDR50 mode and use SDR50 instead. Signed-off-by: Chevron Li Acked-by: Adrian Hunter Link: https://lore.kernel.org/r/20220729100524.387-1-chevron.li@bayhubtech.com Signed-off-by: Ulf Hansson --- drivers/mmc/host/sdhci-pci-o2micro.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/sdhci-pci-o2micro.c b/drivers/mmc/host/sdhci-pci-o2micro.c index 0d4d343..ad457cd 100644 --- a/drivers/mmc/host/sdhci-pci-o2micro.c +++ b/drivers/mmc/host/sdhci-pci-o2micro.c @@ -317,11 +317,12 @@ static int sdhci_o2_execute_tuning(struct mmc_host *mmc, u32 opcode) u32 reg_val; /* - * This handler only implements the eMMC tuning that is specific to + * This handler implements the hardware tuning that is specific to * this controller. Fall back to the standard method for other TIMING. */ if ((host->timing != MMC_TIMING_MMC_HS200) && - (host->timing != MMC_TIMING_UHS_SDR104)) + (host->timing != MMC_TIMING_UHS_SDR104) && + (host->timing != MMC_TIMING_UHS_SDR50)) return sdhci_execute_tuning(mmc, opcode); if (WARN_ON((opcode != MMC_SEND_TUNING_BLOCK_HS200) && @@ -631,6 +632,8 @@ static int sdhci_pci_o2_probe_slot(struct sdhci_pci_slot *slot) if (reg & 0x1) host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; + host->quirks2 |= SDHCI_QUIRK2_BROKEN_DDR50; + sdhci_pci_o2_enable_msi(chip, host); if (chip->pdev->device == PCI_DEVICE_ID_O2_SEABIRD0) { -- 2.7.4