| Message ID | 20241025131442.112862-2-peter.griffin@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | UFS cleanups and enhancements to ufs-exynos for gs101 | expand |
Hi Tudor, On Wed, 30 Oct 2024 at 08:04, Tudor Ambarus <tudor.ambarus@linaro.org> wrote: > > > > On 10/25/24 2:14 PM, Peter Griffin wrote: > > 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> > > Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org> > > some nits/personal preferences below, no need to address them As I'm re-spinning anyways I'll update it like you suggest. Peter.
diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c index 9ec318ef52bf..e25de4b86ac0 100644 --- a/drivers/ufs/host/ufs-exynos.c +++ b/drivers/ufs/host/ufs-exynos.c @@ -771,6 +771,21 @@ 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) @@ -787,6 +802,8 @@ 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 = 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) {
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> --- drivers/ufs/host/ufs-exynos.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)