This is a note to let you know that I've just added the patch titled
cpuidle: tegra: Fix C7 idling state on Tegra114
to the 5.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cpuidle-tegra-fix-c7-idling-state-on-tegra114.patch
and it can be found in the queue-5.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 32c8c34d8132b5fe8497c2538597445a0d65c29d Mon Sep 17 00:00:00 2001
From: Dmitry Osipenko <digetx@xxxxxxxxx>
Date: Tue, 2 Mar 2021 12:54:04 +0300
Subject: cpuidle: tegra: Fix C7 idling state on Tegra114
From: Dmitry Osipenko <digetx@xxxxxxxxx>
commit 32c8c34d8132b5fe8497c2538597445a0d65c29d upstream.
Trusted Foundation firmware doesn't implement the do_idle call and in
this case suspending should fall back to the common suspend path. In order
to fix this issue we will unconditionally set the NOFLUSH_L2 mode via
firmware call, which is a NO-OP on Tegra30/124, and then proceed to the
C7 idling, like it was done by the older Tegra114 cpuidle driver.
Fixes: 14e086baca50 ("cpuidle: tegra: Squash Tegra114 driver into the common driver")
Cc: stable@xxxxxxxxxxxxxxx # 5.7+
Reported-by: Anton Bambura <jenneron@xxxxxxxxxxxxxx> # TF701 T114
Tested-by: Anton Bambura <jenneron@xxxxxxxxxxxxxx> # TF701 T114
Tested-by: Matt Merhar <mattmerhar@xxxxxxxxxxxxxx> # Ouya T30
Tested-by: Peter Geis <pgwipeout@xxxxxxxxx> # Ouya T30
Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
Reviewed-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210302095405.28453-1-digetx@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/cpuidle/cpuidle-tegra.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
--- a/drivers/cpuidle/cpuidle-tegra.c
+++ b/drivers/cpuidle/cpuidle-tegra.c
@@ -135,13 +135,13 @@ static int tegra_cpuidle_c7_enter(void)
{
int err;
- if (tegra_cpuidle_using_firmware()) {
- err = call_firmware_op(prepare_idle, TF_PM_MODE_LP2_NOFLUSH_L2);
- if (err)
- return err;
+ err = call_firmware_op(prepare_idle, TF_PM_MODE_LP2_NOFLUSH_L2);
+ if (err && err != -ENOSYS)
+ return err;
- return call_firmware_op(do_idle, 0);
- }
+ err = call_firmware_op(do_idle, 0);
+ if (err != -ENOSYS)
+ return err;
return cpu_suspend(0, tegra30_pm_secondary_cpu_suspend);
}
Patches currently in stable-queue which might be from digetx@xxxxxxxxx are
queue-5.12/cpuidle-tegra-fix-c7-idling-state-on-tegra114.patch
