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cpuidle: tegra: Fix C7 idling state on Tegra114 

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: 14e086baca ("cpuidle: tegra: Squash Tegra114 driver into the common driver")
Cc: stable@vger.kernel.org # 5.7+
Reported-by: Anton Bambura <jenneron@protonmail.com> # TF701 T114
Tested-by: Anton Bambura <jenneron@protonmail.com> # TF701 T114
Tested-by: Matt Merhar <mattmerhar@protonmail.com> # Ouya T30
Tested-by: Peter Geis <pgwipeout@gmail.com> # Ouya T30
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210302095405.28453-1-digetx@gmail.com
This commit is contained in:
Dmitry Osipenko 2021-03-02 12:54:04 +03:00 committed by Daniel Lezcano
parent e49d033bdd
commit 32c8c34d81
1 changed files with 6 additions and 6 deletions
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12
drivers/cpuidle/cpuidle-tegra.c
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@ -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);
}