To improve the compatibility of GL9763E with HS400 eMMC cards, finetune the RX delay of HS400 mode.
Signed-off-by: Renius Chen <[email protected]> --- drivers/mmc/host/sdhci-pci-gli.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c index 2d13bfcbcacf..14d9154f3af1 100644 --- a/drivers/mmc/host/sdhci-pci-gli.c +++ b/drivers/mmc/host/sdhci-pci-gli.c @@ -95,6 +95,10 @@ #define PCIE_GLI_9763E_MMC_CTRL 0x960 #define GLI_9763E_HS400_SLOW BIT(3) +#define PCIE_GLI_9763E_CLKRXDLY 0x934 +#define GLI_9763E_HS400_RXDLY GENMASK(31, 28) +#define GLI_9763E_HS400_RXDLY_5 0x5 + #define SDHCI_GLI_9763E_CQE_BASE_ADDR 0x200 #define GLI_9763E_CQE_TRNS_MODE (SDHCI_TRNS_MULTI | \ SDHCI_TRNS_BLK_CNT_EN | \ @@ -801,6 +805,11 @@ static void gli_set_gl9763e(struct sdhci_pci_slot *slot) value |= FIELD_PREP(GLI_9763E_CFG2_L1DLY, GLI_9763E_CFG2_L1DLY_MAX); pci_write_config_dword(pdev, PCIE_GLI_9763E_CFG2, value); + pci_read_config_dword(pdev, PCIE_GLI_9763E_CLKRXDLY, &value); + value &= ~GLI_9763E_HS400_RXDLY; + value |= FIELD_PREP(GLI_9763E_HS400_RXDLY, GLI_9763E_HS400_RXDLY_5); + pci_write_config_dword(pdev, PCIE_GLI_9763E_CLKRXDLY, value); + pci_read_config_dword(pdev, PCIE_GLI_9763E_VHS, &value); value &= ~GLI_9763E_VHS_REV; value |= FIELD_PREP(GLI_9763E_VHS_REV, GLI_9763E_VHS_REV_R); -- 2.27.0
