[v2,16/22] HID: intel-thc-hid: intel-quickspi: Add PM implementation

Message ID	20241114053416.4085715-17-even.xu@intel.com
State	New
Headers	show Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C7C421F8189; Thu, 14 Nov 2024 05:35:14 +0000 (UTC) From: Even Xu <even.xu@intel.com> To: jikos@kernel.org, bentiss@kernel.org, corbet@lwn.net, bagasdotme@gmail.com, aaron.ma@canonical.com Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Even Xu <even.xu@intel.com>, Xinpeng Sun <xinpeng.sun@intel.com>, Rui Zhang <rui1.zhang@intel.com>, Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Subject: [PATCH v2 16/22] HID: intel-thc-hid: intel-quickspi: Add PM implementation Date: Thu, 14 Nov 2024 13:34:10 +0800 Message-Id: <20241114053416.4085715-17-even.xu@intel.com> In-Reply-To: <20241114053416.4085715-1-even.xu@intel.com> References: <20241114053416.4085715-1-even.xu@intel.com> Precedence: bulk MIME-Version: 1.0 Content-Transfer-Encoding: 8bit
Series	Add Intel Touch Host Controller drivers \| expand [v2,00/22] Add Intel Touch Host Controller drivers [v2,02/22] HID: intel-thc-hid: Add basic THC driver skeleton [v2,04/22] HID: intel-thc-hid: intel-thc: Add THC PIO operation APIs [v2,06/22] HID: intel-thc-hid: intel-thc: Add THC DMA interfaces [v2,08/22] HID: intel-thc-hid: intel-thc: Add THC interrupt handler [v2,10/22] HID: intel-thc-hid: intel-thc: Add THC I2C config interfaces [v2,12/22] HID: intel-thc-hid: intel-quickspi: Add THC QuickSPI driver hid layer [v2,14/22] HID: intel-thc-hid: intel-quickspi: Add HIDSPI protocol implementation [v2,16/22] HID: intel-thc-hid: intel-quickspi: Add PM implementation [v2,18/22] HID: intel-thc-hid: intel-quicki2c: Add THC QuickI2C driver hid layer [v2,20/22] HID: intel-thc-hid: intel-quicki2c: Add HIDI2C protocol implementation [v2,22/22] HID: intel-thc-hid: intel-quicki2c: Add PM implementation

diff --git a/drivers/hid/intel-thc-hid/intel-quickspi/pci-quickspi.c b/drivers/hid/intel-thc-hid/intel-quickspi/pci-quickspi.c index 73be89933f1e..9c0df1163bcd 100644 --- a/drivers/hid/intel-thc-hid/intel-quickspi/pci-quickspi.c +++ b/drivers/hid/intel-thc-hid/intel-quickspi/pci-quickspi.c @@ -9,6 +9,7 @@ #include <linux/interrupt.h> #include <linux/irqreturn.h> #include <linux/pci.h> +#include <linux/pm_runtime.h> #include "intel-thc-dev.h" #include "intel-thc-hw.h" @@ -281,6 +282,10 @@ static irqreturn_t quickspi_irq_thread_handler(int irq, void *dev_id) if (qsdev->state == QUICKSPI_DISABLED) return IRQ_HANDLED; + ret = pm_runtime_resume_and_get(qsdev->dev); + if (ret) + return IRQ_HANDLED; + int_mask = thc_interrupt_handler(qsdev->thc_hw); if (int_mask & BIT(THC_FATAL_ERR_INT) || int_mask & BIT(THC_TXN_ERR_INT)) { @@ -318,6 +323,9 @@ static irqreturn_t quickspi_irq_thread_handler(int irq, void *dev_id) if (try_recover(qsdev)) qsdev->state = QUICKSPI_DISABLED; + pm_runtime_mark_last_busy(qsdev->dev); + pm_runtime_put_autosuspend(qsdev->dev); + return IRQ_HANDLED; } @@ -641,6 +649,13 @@ static int quickspi_probe(struct pci_dev *pdev, qsdev->state = QUICKSPI_ENABLED; + /* Enable runtime power management */ + pm_runtime_use_autosuspend(qsdev->dev); + pm_runtime_set_autosuspend_delay(qsdev->dev, DEFAULT_AUTO_SUSPEND_DELAY_MS); + pm_runtime_mark_last_busy(qsdev->dev); + pm_runtime_put_noidle(qsdev->dev); + pm_runtime_put_autosuspend(qsdev->dev); + dev_dbg(&pdev->dev, "QuickSPI probe success\n"); return 0; @@ -677,6 +692,8 @@ static void quickspi_remove(struct pci_dev *pdev) quickspi_hid_remove(qsdev); quickspi_dma_deinit(qsdev); + pm_runtime_get_noresume(qsdev->dev); + quickspi_dev_deinit(qsdev); pcim_iounmap_regions(pdev, BIT(0)); @@ -707,6 +724,234 @@ static void quickspi_shutdown(struct pci_dev *pdev) quickspi_dev_deinit(qsdev); } +static int quickspi_suspend(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct quickspi_device *qsdev; + int ret; + + qsdev = pci_get_drvdata(pdev); + if (!qsdev) + return -ENODEV; + + ret = quickspi_set_power(qsdev, HIDSPI_SLEEP); + if (ret) + return ret; + + ret = thc_interrupt_quiesce(qsdev->thc_hw, true); + if (ret) + return ret; + + thc_interrupt_enable(qsdev->thc_hw, false); + + thc_dma_unconfigure(qsdev->thc_hw); + + return 0; +} + +static int quickspi_resume(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct quickspi_device *qsdev; + int ret; + + qsdev = pci_get_drvdata(pdev); + if (!qsdev) + return -ENODEV; + + ret = thc_port_select(qsdev->thc_hw, THC_PORT_TYPE_SPI); + if (ret) + return ret; + + thc_interrupt_config(qsdev->thc_hw); + + thc_interrupt_enable(qsdev->thc_hw, true); + + ret = thc_dma_configure(qsdev->thc_hw); + if (ret) + return ret; + + ret = thc_interrupt_quiesce(qsdev->thc_hw, false); + if (ret) + return ret; + + ret = quickspi_set_power(qsdev, HIDSPI_ON); + if (ret) + return ret; + + return 0; +} + +static int quickspi_freeze(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct quickspi_device *qsdev; + int ret; + + qsdev = pci_get_drvdata(pdev); + if (!qsdev) + return -ENODEV; + + ret = thc_interrupt_quiesce(qsdev->thc_hw, true); + if (ret) + return ret; + + thc_interrupt_enable(qsdev->thc_hw, false); + + thc_dma_unconfigure(qsdev->thc_hw); + + return 0; +} + +static int quickspi_thaw(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct quickspi_device *qsdev; + int ret; + + qsdev = pci_get_drvdata(pdev); + if (!qsdev) + return -ENODEV; + + ret = thc_dma_configure(qsdev->thc_hw); + if (ret) + return ret; + + thc_interrupt_enable(qsdev->thc_hw, true); + + ret = thc_interrupt_quiesce(qsdev->thc_hw, false); + if (ret) + return ret; + + return 0; +} + +static int quickspi_poweroff(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct quickspi_device *qsdev; + int ret; + + qsdev = pci_get_drvdata(pdev); + if (!qsdev) + return -ENODEV; + + ret = thc_interrupt_quiesce(qsdev->thc_hw, true); + if (ret) + return ret; + + thc_interrupt_enable(qsdev->thc_hw, false); + + thc_ltr_unconfig(qsdev->thc_hw); + + quickspi_dma_deinit(qsdev); + + return 0; +} + +static int quickspi_restore(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct quickspi_device *qsdev; + int ret; + + qsdev = pci_get_drvdata(pdev); + if (!qsdev) + return -ENODEV; + + /* Reconfig THC HW when back from hibernate */ + ret = thc_port_select(qsdev->thc_hw, THC_PORT_TYPE_SPI); + if (ret) + return ret; + + thc_spi_input_output_address_config(qsdev->thc_hw, + qsdev->input_report_hdr_addr, + qsdev->input_report_bdy_addr, + qsdev->output_report_addr); + + ret = thc_spi_read_config(qsdev->thc_hw, qsdev->spi_freq_val, + qsdev->spi_read_io_mode, + qsdev->spi_read_opcode, + qsdev->spi_packet_size); + if (ret) + return ret; + + ret = thc_spi_write_config(qsdev->thc_hw, qsdev->spi_freq_val, + qsdev->spi_write_io_mode, + qsdev->spi_write_opcode, + qsdev->spi_packet_size, + qsdev->performance_limit); + if (ret) + return ret; + + thc_interrupt_config(qsdev->thc_hw); + + thc_interrupt_enable(qsdev->thc_hw, true); + + ret = thc_interrupt_quiesce(qsdev->thc_hw, false); + if (ret) + return ret; + + /* TIC may lose power, needs go through reset flow */ + ret = reset_tic(qsdev); + if (ret) + return ret; + + ret = thc_dma_configure(qsdev->thc_hw); + if (ret) + return ret; + + thc_ltr_config(qsdev->thc_hw, + qsdev->active_ltr_val, + qsdev->low_power_ltr_val); + + thc_change_ltr_mode(qsdev->thc_hw, THC_LTR_MODE_ACTIVE); + + return 0; +} + +static int quickspi_runtime_suspend(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct quickspi_device *qsdev; + + qsdev = pci_get_drvdata(pdev); + if (!qsdev) + return -ENODEV; + + thc_change_ltr_mode(qsdev->thc_hw, THC_LTR_MODE_LP); + + pci_save_state(pdev); + + return 0; +} + +static int quickspi_runtime_resume(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct quickspi_device *qsdev; + + qsdev = pci_get_drvdata(pdev); + if (!qsdev) + return -ENODEV; + + thc_change_ltr_mode(qsdev->thc_hw, THC_LTR_MODE_ACTIVE); + + return 0; +} + +static const struct dev_pm_ops quickspi_pm_ops = { + .suspend = quickspi_suspend, + .resume = quickspi_resume, + .freeze = quickspi_freeze, + .thaw = quickspi_thaw, + .poweroff = quickspi_poweroff, + .restore = quickspi_restore, + .runtime_suspend = quickspi_runtime_suspend, + .runtime_resume = quickspi_runtime_resume, + .runtime_idle = NULL, +}; + static const struct pci_device_id quickspi_pci_tbl[] = { {PCI_DEVICE_DATA(INTEL, THC_MTL_DEVICE_ID_SPI_PORT1, &mtl), }, {PCI_DEVICE_DATA(INTEL, THC_MTL_DEVICE_ID_SPI_PORT2, &mtl), }, @@ -726,6 +971,7 @@ static struct pci_driver quickspi_driver = { .probe = quickspi_probe, .remove = quickspi_remove, .shutdown = quickspi_shutdown, + .driver.pm = &quickspi_pm_ops, .driver.probe_type = PROBE_PREFER_ASYNCHRONOUS, }; diff --git a/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-dev.h b/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-dev.h index 49b0322b9ebb..c7400667cd70 100644 --- a/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-dev.h +++ b/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-dev.h @@ -47,6 +47,14 @@ #define MAX_PACKET_SIZE_VALUE_MTL 128 #define MAX_PACKET_SIZE_VALUE_LNL 256 +/* + * THC uses runtime auto suspend to dynamically switch between THC active LTR + * and low power LTR to save CPU power. + * Default value is 5000ms, that means if no touch event in this time, THC will + * change to low power LTR mode. + */ +#define DEFAULT_AUTO_SUSPEND_DELAY_MS 5000 + enum quickspi_dev_state { QUICKSPI_NONE, QUICKSPI_RESETING, diff --git a/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.c b/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.c index 2553d4b42b51..ad52e402c28a 100644 --- a/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.c +++ b/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.c @@ -3,6 +3,7 @@ #include <linux/hid.h> #include <linux/input.h> +#include <linux/pm_runtime.h> #include "quickspi-dev.h" #include "quickspi-hid.h" @@ -54,6 +55,10 @@ static int quickspi_hid_raw_request(struct hid_device *hid, struct quickspi_device *qsdev = hid->driver_data; int ret = 0; + ret = pm_runtime_resume_and_get(qsdev->dev); + if (ret) + return ret; + switch (reqtype) { case HID_REQ_GET_REPORT: ret = quickspi_get_report(qsdev, rtype, reportnum, buf); @@ -66,6 +71,9 @@ static int quickspi_hid_raw_request(struct hid_device *hid, break; } + pm_runtime_mark_last_busy(qsdev->dev); + pm_runtime_put_autosuspend(qsdev->dev); + return ret; }

[v2,16/22] HID: intel-thc-hid: intel-quickspi: Add PM implementation

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