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[v2,00/11] UFS cleanups and enhancements to ufs-exynos for gs101

Message ID 20241025131442.112862-1-peter.griffin@linaro.org
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Series UFS cleanups and enhancements to ufs-exynos for gs101 | expand

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Peter Griffin Oct. 25, 2024, 1:14 p.m. UTC 
Hi folks,

This series provides a few cleanups, bug fixes and feature enhancements for
the ufs-exynos driver, particularly for gs101 SoC.

Regarding cleanup we remove some unused phy attribute data that isn't
required when EXYNOS_UFS_OPT_SKIP_CONFIG_PHY_ATTR is not set.

Regarding bug fixes the check for EXYNOS_UFS_OPT_UFSPR_SECURE is moved
inside exynos_ufs_config_smu() which fixes a Serror in the resume path
for gs101.

Regarding feature enhancements:
* Gear 4 is enabled which has higher speeds and better power management.
* WriteBooster capability is enabled for gs101 which increases write
  performance.

In v2 of this series additionally I've added following patches 8-11 which
add

* Clock gating and hibern8 capabilities are enabled for gs101. This leads
  to a significantly cooler phone when running the upstream kernel on
  Pixel 6.
  Approximately 10 degrees cooler after 20 minutes at a shell prompt.
* AXI bus on gs101 is correctly configured for write line unique transactions
* ACG is set to be controlled by UFS_ACG_DISABLE for gs101

In v1 I mentioned the phy hibern8 series in [1] that is still under discussion
however further testing reveals hibern8 feature still works without the additional
UFS phy register writes done in [1]. So this series can be merged as is.

[1] https://lore.kernel.org/linux-arm-kernel/20241002201555.3332138-3-peter.griffin@linaro.org/T/

regards,

Peter

Changes since v1:
 - Remove superfluous struct device parameter to exynos_ufs_shareability() (Peter)
 - Add patches 8-11 (hibern8 fixes, WLU support etc)

Peter Griffin (11):
  scsi: ufs: exynos: Allow UFS Gear 4
  scsi: ufs: exynos: add check inside exynos_ufs_config_smu()
  scsi: ufs: exynos: gs101: remove EXYNOS_UFS_OPT_BROKEN_AUTO_CLK_CTRL
  scsi: ufs: exynos: Add EXYNOS_UFS_OPT_SKIP_CONFIG_PHY_ATTR check
  scsi: ufs: exynos: gs101: remove unused phy attribute fields
  scsi: ufs: exynos: remove tx_dif_p_nsec from exynosauto_ufs_drv_init()
  scsi: ufs: exynos: add gs101_ufs_drv_init() hook and enable
    WriteBooster
  scsi: ufs: exynos: enable write line unique transactions on gs101
  scsi: ufs: exynos: set ACG to be controlled by UFS_ACG_DISABLE
  scsi: ufs: exynos: fix hibern8 notify callbacks
  scsi: ufs: exynos: gs101: enable clock gating with hibern8

 drivers/ufs/host/ufs-exynos.c | 126 +++++++++++++++++++---------------
 1 file changed, 70 insertions(+), 56 deletions(-)