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| author |   Dmitry Osipenko <digetx@gmail.com> | 2020-03-25 01:43:34 +0300 |
|---|---|---|
| committer |   Thierry Reding <treding@nvidia.com> | 2020-05-06 18:29:05 +0200 |
| commit | 38743e414e7cc6d23f41276f298ad4781890a89f (patch) | |
| tree | 2bb7f701ce68057af34a2e21c0581fc34654cbcd /arch/arm/mach-tegra | |
| parent | ARM: tegra: Initialize r0 register for firmware wake-up (diff) | |
| download | wireguard-linux-38743e414e7cc6d23f41276f298ad4781890a89f.tar.xz wireguard-linux-38743e414e7cc6d23f41276f298ad4781890a89f.zip | |
ARM: tegra: Do not fully reinitialize L2 on resume
ASUS TF300T device may not work properly if firmware is asked to fully
re-initialize L2 cache after resume from LP2 suspend. The downstream
kernel of TF300T uses different opcode to enable cache after resuming
from LP2, this opcode also works fine on Nexus 7 and Ouya devices.
Supposedly, this may be needed by an older firmware versions.
Reported-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Tested-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Tested-by: Jasper Korten <jja2000@gmail.com>
Tested-by: David Heidelberg <david@ixit.cz>
Tested-by: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra')
| -rw-r--r-- | arch/arm/mach-tegra/pm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c index d1e1a61b12cf..6452ebf68d40 100644 --- a/arch/arm/mach-tegra/pm.c +++ b/arch/arm/mach-tegra/pm.c @@ -216,6 +216,8 @@ int tegra_pm_enter_lp2(void) restore_cpu_complex(); cpu_cluster_pm_exit(); + call_firmware_op(prepare_idle, TF_PM_MODE_NONE); + return err; } @@ -391,6 +393,8 @@ static int tegra_suspend_enter(suspend_state_t state) local_fiq_enable(); + call_firmware_op(prepare_idle, TF_PM_MODE_NONE); + return 0; } |