diff options
| author | Peter Griffin <peter.griffin@linaro.org> | 2024-10-31 15:00:22 +0000 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2024-11-02 21:13:00 -0400 |
| commit | 516ceaaf539de83de3af04c46198f39180cc44a1 (patch) | |
| tree | 32c93c256ed66e8fdb7228a493ac8d44a21d621a | |
| parent | afd613ca2c60d0a970d434bc73e1ddcdb925c799 (diff) | |
scsi: ufs: exynos: Allow UFS Gear 4
UFS Gear 4 offers faster speeds, and better power usage so lets enable
it.
Currently ufshcd_init_host_params() sets UFS_HS_G3 as a default, so even
if the device supports G4 we end up negotiating down to G3.
For SoCs like gs101 which have a UFS major controller version of 3 or
above advertise Gear 4. This then allows a Gear 4 link on Pixel 6.
For earlier controller versions keep the current default behaviour of
reporting G3.
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Link: https://lore.kernel.org/r/20241031150033.3440894-4-peter.griffin@linaro.org
Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/ufs/host/ufs-exynos.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c index 7e381ab1011d..33de7ff747a2 100644 --- a/drivers/ufs/host/ufs-exynos.c +++ b/drivers/ufs/host/ufs-exynos.c @@ -766,6 +766,21 @@ static void exynos_ufs_config_sync_pattern_mask(struct exynos_ufs *ufs, exynos_ufs_disable_ov_tm(hba); } +#define UFS_HW_VER_MAJOR_MASK GENMASK(15, 8) + +static u32 exynos_ufs_get_hs_gear(struct ufs_hba *hba) +{ + u8 major; + + major = FIELD_GET(UFS_HW_VER_MAJOR_MASK, hba->ufs_version); + + if (major >= 3) + return UFS_HS_G4; + + /* Default is HS-G3 */ + return UFS_HS_G3; +} + static int exynos_ufs_pre_pwr_mode(struct ufs_hba *hba, struct ufs_pa_layer_attr *dev_max_params, struct ufs_pa_layer_attr *dev_req_params) @@ -783,6 +798,10 @@ static int exynos_ufs_pre_pwr_mode(struct ufs_hba *hba, ufshcd_init_host_params(&host_params); + /* This driver only support symmetric gear setting e.g. hs_tx_gear == hs_rx_gear */ + host_params.hs_tx_gear = exynos_ufs_get_hs_gear(hba); + host_params.hs_rx_gear = exynos_ufs_get_hs_gear(hba); + ret = ufshcd_negotiate_pwr_params(&host_params, dev_max_params, dev_req_params); if (ret) { pr_err("%s: failed to determine capabilities\n", __func__); |