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[24.56.189.219]) by smtp.gmail.com with ESMTPSA id z30-20020a056602081e00b0068b1858c81asm6165821iow.13.2022.08.30.16.16.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Aug 2022 16:16:18 -0700 (PDT) From: Raul E Rangel To: linux-acpi@vger.kernel.org, linux-input@vger.kernel.org Cc: hdegoede@redhat.com, mario.limonciello@amd.com, timvp@google.com, rafael@kernel.org, Raul E Rangel , Len Brown , linux-kernel@vger.kernel.org Subject: [PATCH 8/8] ACPI: PM: Take wake IRQ into consideration when entering suspend-to-idle Date: Tue, 30 Aug 2022 17:15:41 -0600 Message-Id: <20220830171332.8.I7d9202463f08373feccd6e8fd87482c4f40ece5d@changeid> X-Mailer: git-send-email 2.37.2.672.g94769d06f0-goog In-Reply-To: <20220830231541.1135813-1-rrangel@chromium.org> References: <20220830231541.1135813-1-rrangel@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org This change adds support for ACPI devices that use ExclusiveAndWake or SharedAndWake in their _CRS GpioInt definition (instead of using _PRW), and also provide power resources. Previously the ACPI subsystem had no idea if the device had a wake capable interrupt armed. This resulted in the ACPI device PM system placing the device into D3Cold, and thus cutting power to the device. With this change we will now query the _S0W method to figure out the appropriate wake capable D-state. Signed-off-by: Raul E Rangel --- drivers/acpi/device_pm.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c index 9dce1245689ca2..6bc81f525d5160 100644 --- a/drivers/acpi/device_pm.c +++ b/drivers/acpi/device_pm.c @@ -681,8 +681,23 @@ static int acpi_dev_pm_get_state(struct device *dev, struct acpi_device *adev, d_min = ret; wakeup = device_may_wakeup(dev) && adev->wakeup.flags.valid && adev->wakeup.sleep_state >= target_state; - } else { - wakeup = adev->wakeup.flags.valid; + } else if (acpi_device_can_wakeup(adev)) { + /* ACPI GPE from specified by _PRW. */ + wakeup = true; + } else if (device_may_wakeup(dev) && dev->power.wakeirq) { + /* + * The ACPI subsystem doesn't manage the wake bit for IRQs + * defined with ExclusiveAndWake and SharedAndWake. Instead we + * expect them to be managed via the PM subsystem. Drivers + * should call dev_pm_set_wake_irq to register an IRQ as a wake + * source. + * + * If a device has a wake IRQ attached we need to check the + * _S0W method to get the correct wake D-state. Otherwise we + * end up putting the device into D3Cold which will more than + * likely disable wake functionality. + */ + wakeup = true; } /*