On Thu, 15 Apr 2021 at 05:23, Ben Chuang <benchuang...@gmail.com> wrote:
>
> GL975x enters ASPM L1 state after a short idle in default.
> Enlarge the idle period to 7.9us for improving the R/W performance.
>
> Signed-off-by: Ben Chuang <benchuang...@gmail.com>
Applied for next, thanks!
Kind regards
Uffe
> ---
> drivers/mmc/host/sdhci-pci-gli.c | 32 ++++++++++++++++++++++++++++++++
> 1 file changed, 32 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-pci-gli.c
> b/drivers/mmc/host/sdhci-pci-gli.c
> index eb1ebb67e113..592d79082f58 100644
> --- a/drivers/mmc/host/sdhci-pci-gli.c
> +++ b/drivers/mmc/host/sdhci-pci-gli.c
> @@ -22,6 +22,10 @@
> #define GLI_9750_WT_EN_ON 0x1
> #define GLI_9750_WT_EN_OFF 0x0
>
> +#define SDHCI_GLI_9750_CFG2 0x848
> +#define SDHCI_GLI_9750_CFG2_L1DLY GENMASK(28, 24)
> +#define GLI_9750_CFG2_L1DLY_VALUE 0x1F
> +
> #define SDHCI_GLI_9750_DRIVING 0x860
> #define SDHCI_GLI_9750_DRIVING_1 GENMASK(11, 0)
> #define SDHCI_GLI_9750_DRIVING_2 GENMASK(27, 26)
> @@ -113,6 +117,10 @@
> #define PCI_GLI_9755_LFCLK GENMASK(14, 12)
> #define PCI_GLI_9755_DMACLK BIT(29)
>
> +#define PCI_GLI_9755_CFG2 0x48
> +#define PCI_GLI_9755_CFG2_L1DLY GENMASK(28, 24)
> +#define GLI_9755_CFG2_L1DLY_VALUE 0x1F
> +
> #define PCI_GLI_9755_PLL 0x64
> #define PCI_GLI_9755_PLL_LDIV GENMASK(9, 0)
> #define PCI_GLI_9755_PLL_PDIV GENMASK(14, 12)
> @@ -408,6 +416,22 @@ static void sdhci_gl9750_set_clock(struct sdhci_host
> *host, unsigned int clock)
> sdhci_enable_clk(host, clk);
> }
>
> +static void gl9750_hw_setting(struct sdhci_host *host)
> +{
> + u32 value;
> +
> + gl9750_wt_on(host);
> +
> + value = sdhci_readl(host, SDHCI_GLI_9750_CFG2);
> + value &= ~SDHCI_GLI_9750_CFG2_L1DLY;
> + /* set ASPM L1 entry delay to 7.9us */
> + value |= FIELD_PREP(SDHCI_GLI_9750_CFG2_L1DLY,
> + GLI_9750_CFG2_L1DLY_VALUE);
> + sdhci_writel(host, value, SDHCI_GLI_9750_CFG2);
> +
> + gl9750_wt_off(host);
> +}
> +
> static void gli_pcie_enable_msi(struct sdhci_pci_slot *slot)
> {
> int ret;
> @@ -555,6 +579,13 @@ static void gl9755_hw_setting(struct sdhci_pci_slot
> *slot)
> value &= ~PCI_GLI_9755_SCP_DIS;
> pci_write_config_dword(pdev, PCI_GLI_9755_SerDes, value);
>
> + pci_read_config_dword(pdev, PCI_GLI_9755_CFG2, &value);
> + value &= ~PCI_GLI_9755_CFG2_L1DLY;
> + /* set ASPM L1 entry delay to 7.9us */
> + value |= FIELD_PREP(PCI_GLI_9755_CFG2_L1DLY,
> + GLI_9755_CFG2_L1DLY_VALUE);
> + pci_write_config_dword(pdev, PCI_GLI_9755_CFG2, value);
> +
> gl9755_wt_off(pdev);
> }
>
> @@ -562,6 +593,7 @@ static int gli_probe_slot_gl9750(struct sdhci_pci_slot
> *slot)
> {
> struct sdhci_host *host = slot->host;
>
> + gl9750_hw_setting(host);
> gli_pcie_enable_msi(slot);
> slot->host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
> sdhci_enable_v4_mode(host);
> --
> 2.30.0
>
