[v3,00/14] UFS cleanups and enhancements to ufs-exynos for gs101

Message

Peter Griffin Oct. 31, 2024, 3 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.
* 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

Additionally in v3 I've added 2 minor cleanup patches from Tudor and also
an update to MAINTAINERS to add myself as a reviewer and the linux-samsung-soc
list.

Note: 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 and has no runtime dependencies on [1] to be functional.

[1] https://lore.kernel.org/linux-arm-kernel/[e-mail]/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)

Changes since v2:
 - Add 2 cleanup patches from Tudor to the series and rebase (Tudor)
 - Fixup various commit messages as per Tudors review feedback (Tudor)
 - Collect up reviewed-by tags, and CC stable where appropriate (Peter)
 - Add myself as a reviewer in MAINTAINERS for ufs-exynos driver
   and add linux-samsung-soc list. (Peter)
 - Added blank line and split hs_tx_gear/hs_rx_gear into separate lines (Tudor)

Peter Griffin (12):
  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
  MAINTAINERS: Update UFS Exynos entry

Tudor Ambarus (2):
  scsi: ufs: exynos: remove empty drv_init method
  scsi: ufs: exynos: remove superfluous function parameter

 MAINTAINERS                   |   2 +
 drivers/ufs/host/ufs-exynos.c | 136 ++++++++++++++++++----------------
 drivers/ufs/host/ufs-exynos.h |   2 +-
 3 files changed, 76 insertions(+), 64 deletions(-)