diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2025-10-24 11:59:15 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2025-10-29 23:20:19 -0400 |
| commit | bb44826c3bdbf1fa3957008a04908f45e5666463 (patch) | |
| tree | 3da2bc0d08c17478789f0748dc12be6f88b3bd03 /drivers/gpu/drm/amd/amdgpu/amdgpu_isp.c | |
| parent | f838d624fd1183e07db86f3138bcd05fd7630a1e (diff) | |
scsi: ufs: ufs-pci: Fix S0ix/S3 for Intel controllers
Intel platforms with UFS, can support Suspend-to-Idle (S0ix) and
Suspend-to-RAM (S3). For S0ix the link state should be HIBERNATE. For
S3, state is lost, so the link state must be OFF. Driver policy,
expressed by spm_lvl, can be 3 (link HIBERNATE, device SLEEP) for S0ix
but must be changed to 5 (link OFF, device POWEROFF) for S3.
Fix support for S0ix/S3 by switching spm_lvl as needed. During suspend
->prepare(), if the suspend target state is not Suspend-to-Idle, ensure
the spm_lvl is at least 5 to ensure that resume will be possible from
deep sleep states. During suspend ->complete(), restore the spm_lvl to
its original value that is suitable for S0ix.
This fix is first needed in Intel Alder Lake based controllers.
Fixes: 7dc9fb47bc9a ("scsi: ufs: ufs-pci: Add support for Intel ADL")
Cc: stable@vger.kernel.org
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20251024085918.31825-2-adrian.hunter@intel.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_isp.c')
0 files changed, 0 insertions, 0 deletions