diff options
Diffstat (limited to 'drivers/ufs/host/ufs-qcom.c')
| -rw-r--r-- | drivers/ufs/host/ufs-qcom.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 8fde5204e88b0..8d68bd21ae733 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -738,8 +738,17 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba, * the second init can program the optimal PHY settings. This allows one to start * the first init with either the minimum or the maximum support gear. */ - if (hba->ufshcd_state == UFSHCD_STATE_RESET) - host->phy_gear = dev_req_params->gear_tx; + if (hba->ufshcd_state == UFSHCD_STATE_RESET) { + /* + * Skip REINIT if the negotiated gear matches with the + * initial phy_gear. Otherwise, update the phy_gear to + * program the optimal gear setting during REINIT. + */ + if (host->phy_gear == dev_req_params->gear_tx) + hba->quirks &= ~UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH; + else + host->phy_gear = dev_req_params->gear_tx; + } /* enable the device ref clock before changing to HS mode */ if (!ufshcd_is_hs_mode(&hba->pwr_info) && @@ -843,15 +852,20 @@ static void ufs_qcom_set_phy_gear(struct ufs_qcom_host *host) struct ufs_host_params *host_params = &host->host_params; u32 val, dev_major; + /* + * Default to powering up the PHY to the max gear possible, which is + * backwards compatible with lower gears but not optimal from + * a power usage point of view. After device negotiation, if the + * gear is lower a reinit will be performed to program the PHY + * to the ideal gear for this combo of controller and device. + */ host->phy_gear = host_params->hs_tx_gear; if (host->hw_ver.major < 0x4) { /* - * For controllers whose major HW version is < 4, power up the - * PHY using minimum supported gear (UFS_HS_G2). Switching to - * max gear will be performed during reinit if supported. - * For newer controllers, whose major HW version is >= 4, power - * up the PHY using max supported gear. + * These controllers only have one PHY init sequence, + * let's power up the PHY using that (the minimum supported + * gear, UFS_HS_G2). */ host->phy_gear = UFS_HS_G2; } else if (host->hw_ver.major >= 0x5) { |