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SubjectRe: [PATCH v9 04/17] ARM: tegra: Change tegra_set_cpu_in_lp2() type to void
On Thu, Feb 13, 2020 at 02:51:21AM +0300, Dmitry Osipenko wrote:
> The Tegra30 CPUIDLE driver has intention to check whether primary CPU was
> the last CPU that entered LP2 (CC6) idle-state, but that functionality
> never got utilized because driver never supported the CC6 state for the
> case where any secondary CPU is online. The new cpuidle driver will
> properly support CC6 on Tegra30, including the case where secondary CPUs
> are online, and that knowledge about what CPUs entered into CC6 won't be
> needed at all because new driver will use different approach by making use
> of the coupled idle-state and explicitly parking secondary CPUs before
> entering into CC6. Thus this patch is just a minor cleanup change.
>
> Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
> Tested-by: Peter Geis <pgwipeout@gmail.com>
> Tested-by: Jasper Korten <jja2000@gmail.com>
> Tested-by: David Heidelberg <david@ixit.cz>
> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
> ---
> arch/arm/mach-tegra/cpuidle-tegra30.c | 14 ++++----------

Mind to move to drivers/cpuidle ?

Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>

> arch/arm/mach-tegra/pm.c | 8 +-------
> arch/arm/mach-tegra/pm.h | 2 +-
> 3 files changed, 6 insertions(+), 18 deletions(-)
>
> diff --git a/arch/arm/mach-tegra/cpuidle-tegra30.c b/arch/arm/mach-tegra/cpuidle-tegra30.c
> index c6128526877d..a3ce8dabfe18 100644
> --- a/arch/arm/mach-tegra/cpuidle-tegra30.c
> +++ b/arch/arm/mach-tegra/cpuidle-tegra30.c
> @@ -98,22 +98,16 @@ static int tegra30_idle_lp2(struct cpuidle_device *dev,
> int index)
> {
> bool entered_lp2 = false;
> - bool last_cpu;
>
> local_fiq_disable();
>
> - last_cpu = tegra_set_cpu_in_lp2();
> + tegra_set_cpu_in_lp2();
> cpu_pm_enter();
>
> - if (dev->cpu == 0) {
> - if (last_cpu)
> - entered_lp2 = tegra30_cpu_cluster_power_down(dev, drv,
> - index);
> - else
> - cpu_do_idle();
> - } else {
> + if (dev->cpu == 0)
> + entered_lp2 = tegra30_cpu_cluster_power_down(dev, drv, index);
> + else
> entered_lp2 = tegra30_cpu_core_power_down(dev, drv, index);
> - }
>
> cpu_pm_exit();
> tegra_clear_cpu_in_lp2();
> diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c
> index 1ff499068bb1..a72f9a2d3cb7 100644
> --- a/arch/arm/mach-tegra/pm.c
> +++ b/arch/arm/mach-tegra/pm.c
> @@ -123,11 +123,9 @@ void tegra_clear_cpu_in_lp2(void)
> spin_unlock(&tegra_lp2_lock);
> }
>
> -bool tegra_set_cpu_in_lp2(void)
> +void tegra_set_cpu_in_lp2(void)
> {
> int phy_cpu_id = cpu_logical_map(smp_processor_id());
> - bool last_cpu = false;
> - cpumask_t *cpu_lp2_mask = tegra_cpu_lp2_mask;
> u32 *cpu_in_lp2 = tegra_cpu_lp2_mask;
>
> spin_lock(&tegra_lp2_lock);
> @@ -135,11 +133,7 @@ bool tegra_set_cpu_in_lp2(void)
> BUG_ON((*cpu_in_lp2 & BIT(phy_cpu_id)));
> *cpu_in_lp2 |= BIT(phy_cpu_id);
>
> - if ((phy_cpu_id == 0) && cpumask_equal(cpu_lp2_mask, cpu_online_mask))
> - last_cpu = true;
> -
> spin_unlock(&tegra_lp2_lock);
> - return last_cpu;
> }
>
> static int tegra_sleep_cpu(unsigned long v2p)
> diff --git a/arch/arm/mach-tegra/pm.h b/arch/arm/mach-tegra/pm.h
> index b9cc12222bb1..2c294f6365c0 100644
> --- a/arch/arm/mach-tegra/pm.h
> +++ b/arch/arm/mach-tegra/pm.h
> @@ -24,7 +24,7 @@ void tegra30_lp1_iram_hook(void);
> void tegra30_sleep_core_init(void);
>
> void tegra_clear_cpu_in_lp2(void);
> -bool tegra_set_cpu_in_lp2(void);
> +void tegra_set_cpu_in_lp2(void);
> void tegra_idle_lp2_last(void);
> extern void (*tegra_tear_down_cpu)(void);
>
> --
> 2.24.0
>

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