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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 <chevron.li@bayhubtech.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20220729100524.387-1-chevron.li@bayhubtech.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Chevron Li 2022-07-29 03:05:24 -07:00 committed by Ulf Hansson
parent 524836095d
commit 50aecccc3e
1 changed files with 5 additions and 2 deletions
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7
drivers/mmc/host/sdhci-pci-o2micro.c
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@ -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) {