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| author | Hans de Goede <hdegoede@redhat.com> | 2017-12-06 12:21:35 +0100 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2017-12-07 10:40:57 +0000 |
| commit | b860b419d970f286294fbfb2b21a4028fd8ee442 (patch) | |
| tree | 7b7e74b07a1e727c7993a88384dd53d04e98fe5a /include/linux | |
| parent | 001dde9400d5c3e9e2ce2abe06c1efa70a25dfde (diff) | |
| download | linux-stable-b860b419d970f286294fbfb2b21a4028fd8ee442.tar.gz linux-stable-b860b419d970f286294fbfb2b21a4028fd8ee442.tar.bz2 linux-stable-b860b419d970f286294fbfb2b21a4028fd8ee442.zip | |
mfd: Fix RTS5227 (and others) powermanagement
Commit 8275b77a1513 ("mfd: rts5249: Add support for RTS5250S power
saving") adds powersaving support for device-ids 5249 524a and 525a.
But as a side effect it breaks ASPM support for all the other device-ids,
causing e.g. the Haswell CPU on a Lenovo T440s to not go into a higher
c-state then PC3, while previously it would go to PC7, causing the
machine to idle at 7.4W instead of 6.6W!
The problem here is the new option.dev_aspm_mode field, which only gets
explicitly initialized in the new code for the device-ids 5249 524a and
525a. Leaving the dev_aspm_mode 0 for the other device-ids.
The default dev_aspm_mode 0 is mapped to DEV_ASPM_DISABLE, but the
old behavior of calling rtsx_pci_enable_aspm() when idle and
rtsx_pci_disable_aspm() when busy happens when dev_aspm_mode ==
DEV_ASPM_DYNAMIC.
This commit changes the enum so that 0 = DEV_ASPM_DYNAMIC matching the
old default behavior, fixing the pm regression with the other device-ids.
Fixes: 8275b77a1513 ("mfd: rts5249: Add support for RTS5250S power saving")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Rui Feng <rui_feng@realsil.com.cn>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mfd/rtsx_pci.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/mfd/rtsx_pci.h b/include/linux/mfd/rtsx_pci.h index a2a1318a3d0c..c3d3f04d8cc6 100644 --- a/include/linux/mfd/rtsx_pci.h +++ b/include/linux/mfd/rtsx_pci.h @@ -915,10 +915,10 @@ enum PDEV_STAT {PDEV_STAT_IDLE, PDEV_STAT_RUN}; #define LTR_L1SS_PWR_GATE_CHECK_CARD_EN BIT(6) enum dev_aspm_mode { - DEV_ASPM_DISABLE = 0, DEV_ASPM_DYNAMIC, DEV_ASPM_BACKDOOR, DEV_ASPM_STATIC, + DEV_ASPM_DISABLE, }; /* |