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[109.252.193.52]) by smtp.gmail.com with ESMTPSA id y16sm2783451ljg.83.2021.03.02.01.54.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Mar 2021 01:54:39 -0800 (PST) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , "Rafael J. Wysocki" , Daniel Lezcano , Anton Bambura , Matt Merhar , Peter Geis Cc: linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH RESEND v2 1/2] cpuidle: tegra: Fix C7 idling state on Tegra114 Date: Tue, 2 Mar 2021 12:54:04 +0300 Message-Id: <20210302095405.28453-1-digetx@gmail.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org 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@vger.kernel.org # 5.7+ Reported-by: Anton Bambura # TF701 T114 Tested-by: Anton Bambura # TF701 T114 Tested-by: Matt Merhar # Ouya T30 Tested-by: Peter Geis # Ouya T30 Signed-off-by: Dmitry Osipenko Reviewed-by: Daniel Lezcano --- Changelog: v2: - No changes. V1 got no attention, hence re-sending. drivers/cpuidle/cpuidle-tegra.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/cpuidle/cpuidle-tegra.c b/drivers/cpuidle/cpuidle-tegra.c index 191966dc8d02..29c5e83500d3 100644 --- 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); }