5.15-stable review patch. If anyone has any objections, please let me know.
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From: Victor Shih victor.shih@genesyslogic.com.tw
commit d7133797e9e1b72fd89237f68cb36d745599ed86 upstream.
When GL9750 enters ASPM L1 sub-states, it will stay at L1.1 and will not enter L1.2. The workaround is to toggle PM state to allow GL9750 to enter ASPM L1.2.
Signed-off-by: Victor Shih victor.shih@genesyslogic.com.tw Link: https://lore.kernel.org/r/20230912091710.7797-1-victorshihgli@gmail.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mmc/host/sdhci-pci-gli.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
--- a/drivers/mmc/host/sdhci-pci-gli.c +++ b/drivers/mmc/host/sdhci-pci-gli.c @@ -23,6 +23,9 @@ #define GLI_9750_WT_EN_ON 0x1 #define GLI_9750_WT_EN_OFF 0x0
+#define PCI_GLI_9750_PM_CTRL 0xFC +#define PCI_GLI_9750_PM_STATE GENMASK(1, 0) + #define SDHCI_GLI_9750_CFG2 0x848 #define SDHCI_GLI_9750_CFG2_L1DLY GENMASK(28, 24) #define GLI_9750_CFG2_L1DLY_VALUE 0x1F @@ -421,8 +424,12 @@ static void sdhci_gl9750_set_clock(struc
static void gl9750_hw_setting(struct sdhci_host *host) { + struct sdhci_pci_slot *slot = sdhci_priv(host); + struct pci_dev *pdev; u32 value;
+ pdev = slot->chip->pdev; + gl9750_wt_on(host);
value = sdhci_readl(host, SDHCI_GLI_9750_CFG2); @@ -432,6 +439,13 @@ static void gl9750_hw_setting(struct sdh GLI_9750_CFG2_L1DLY_VALUE); sdhci_writel(host, value, SDHCI_GLI_9750_CFG2);
+ /* toggle PM state to allow GL9750 to enter ASPM L1.2 */ + pci_read_config_dword(pdev, PCI_GLI_9750_PM_CTRL, &value); + value |= PCI_GLI_9750_PM_STATE; + pci_write_config_dword(pdev, PCI_GLI_9750_PM_CTRL, value); + value &= ~PCI_GLI_9750_PM_STATE; + pci_write_config_dword(pdev, PCI_GLI_9750_PM_CTRL, value); + gl9750_wt_off(host); }