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authorDmitry Osipenko <digetx@gmail.com>2020-03-25 01:43:34 +0300
committerThierry Reding <treding@nvidia.com>2020-05-06 18:29:05 +0200
commit38743e414e7cc6d23f41276f298ad4781890a89f (patch)
tree2bb7f701ce68057af34a2e21c0581fc34654cbcd /arch/arm/mach-tegra
parent36dc3b1a7e9dd332d224cc187acdaa9f2023a1f1 (diff)
downloadlinux-38743e414e7cc6d23f41276f298ad4781890a89f.tar.bz2
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.c4
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;
}