diff options
Diffstat (limited to 'drivers/staging/media/atomisp/pci/atomisp_v4l2.c')
| -rw-r--r-- | drivers/staging/media/atomisp/pci/atomisp_v4l2.c | 165 |
1 files changed, 57 insertions, 108 deletions
diff --git a/drivers/staging/media/atomisp/pci/atomisp_v4l2.c b/drivers/staging/media/atomisp/pci/atomisp_v4l2.c index e786b81921da..ba628f7cf385 100644 --- a/drivers/staging/media/atomisp/pci/atomisp_v4l2.c +++ b/drivers/staging/media/atomisp/pci/atomisp_v4l2.c @@ -19,6 +19,7 @@ */ #include <linux/module.h> #include <linux/pci.h> +#include <linux/pm_domain.h> #include <linux/pm_runtime.h> #include <linux/pm_qos.h> #include <linux/timer.h> @@ -57,12 +58,6 @@ static uint skip_fwload; module_param(skip_fwload, uint, 0644); MODULE_PARM_DESC(skip_fwload, "Skip atomisp firmware load"); -/* memory optimization: deferred firmware loading */ -bool defer_fw_load; -module_param(defer_fw_load, bool, 0644); -MODULE_PARM_DESC(defer_fw_load, - "Defer FW loading until device is opened (default:disable)"); - /* cross componnet debug message flag */ int dbg_level; module_param(dbg_level, int, 0644); @@ -524,7 +519,7 @@ static int atomisp_save_iunit_reg(struct atomisp_device *isp) return 0; } -static int __maybe_unused atomisp_restore_iunit_reg(struct atomisp_device *isp) +static int atomisp_restore_iunit_reg(struct atomisp_device *isp) { struct pci_dev *pdev = to_pci_dev(isp->dev); @@ -637,31 +632,21 @@ done: */ static void punit_ddr_dvfs_enable(bool enable) { - int door_bell = 1 << 8; - int max_wait = 30; int reg; iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, MRFLD_ISPSSDVFS, ®); if (enable) { reg &= ~(MRFLD_BIT0 | MRFLD_BIT1); } else { - reg |= (MRFLD_BIT1 | door_bell); + reg |= MRFLD_BIT1; reg &= ~(MRFLD_BIT0); } iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, MRFLD_ISPSSDVFS, reg); - - /* Check Req_ACK to see freq status, wait until door_bell is cleared */ - while ((reg & door_bell) && max_wait--) { - iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, MRFLD_ISPSSDVFS, ®); - usleep_range(100, 500); - } - - if (max_wait == -1) - pr_info("DDR DVFS, door bell is not cleared within 3ms\n"); } static int atomisp_mrfld_power(struct atomisp_device *isp, bool enable) { + struct pci_dev *pdev = to_pci_dev(isp->dev); unsigned long timeout; u32 val = enable ? MRFLD_ISPSSPM0_IUNIT_POWER_ON : MRFLD_ISPSSPM0_IUNIT_POWER_OFF; @@ -669,16 +654,10 @@ static int atomisp_mrfld_power(struct atomisp_device *isp, bool enable) dev_dbg(isp->dev, "IUNIT power-%s.\n", enable ? "on" : "off"); /* WA for P-Unit, if DVFS enabled, ISP timeout observed */ - if (IS_CHT && enable) + if (IS_CHT && enable) { punit_ddr_dvfs_enable(false); - - /* - * FIXME:WA for ECS28A, with this sleep, CTS - * android.hardware.camera2.cts.CameraDeviceTest#testCameraDeviceAbort - * PASS, no impact on other platforms - */ - if (IS_BYT && enable) - msleep(10); + msleep(20); + } /* Write to ISPSSPM0 bit[1:0] to power on/off the IUNIT */ iosf_mbi_modify(BT_MBI_UNIT_PMC, MBI_REG_READ, MRFLD_ISPSSPM0, @@ -703,6 +682,7 @@ static int atomisp_mrfld_power(struct atomisp_device *isp, bool enable) tmp = (tmp >> MRFLD_ISPSSPM0_ISPSSS_OFFSET) & MRFLD_ISPSSPM0_ISPSSC_MASK; if (tmp == val) { trace_ipu_cstate(enable); + pdev->current_state = enable ? PCI_D0 : PCI_D3cold; return 0; } @@ -743,6 +723,7 @@ int atomisp_power_off(struct device *dev) pci_write_config_dword(pdev, MRFLD_PCI_CSI_CONTROL, reg); cpu_latency_qos_update_request(&isp->pm_qos, PM_QOS_DEFAULT_VALUE); + pci_save_state(pdev); return atomisp_mrfld_power(isp, false); } @@ -756,6 +737,7 @@ int atomisp_power_on(struct device *dev) if (ret) return ret; + pci_restore_state(to_pci_dev(dev)); cpu_latency_qos_update_request(&isp->pm_qos, isp->max_isr_latency); /*restore register values for iUnit and iUnitPHY registers*/ @@ -767,7 +749,7 @@ int atomisp_power_on(struct device *dev) return atomisp_css_init(isp); } -static int __maybe_unused atomisp_suspend(struct device *dev) +static int atomisp_suspend(struct device *dev) { struct atomisp_device *isp = (struct atomisp_device *) dev_get_drvdata(dev); @@ -790,10 +772,12 @@ static int __maybe_unused atomisp_suspend(struct device *dev) } spin_unlock_irqrestore(&isp->lock, flags); + pm_runtime_resume(dev); + return atomisp_power_off(dev); } -static int __maybe_unused atomisp_resume(struct device *dev) +static int atomisp_resume(struct device *dev) { return atomisp_power_on(dev); } @@ -953,45 +937,9 @@ static int atomisp_subdev_probe(struct atomisp_device *isp) /* FIXME: should, instead, use I2C probe */ for (subdevs = pdata->subdevs; subdevs->type; ++subdevs) { - struct v4l2_subdev *subdev; - struct i2c_board_info *board_info = - &subdevs->v4l2_subdev.board_info; - struct i2c_adapter *adapter = - i2c_get_adapter(subdevs->v4l2_subdev.i2c_adapter_id); - - dev_info(isp->dev, "Probing Subdev %s\n", board_info->type); - - if (!adapter) { - dev_err(isp->dev, - "Failed to find i2c adapter for subdev %s\n", - board_info->type); - break; - } - - /* In G-Min, the sensor devices will already be probed - * (via ACPI) and registered, do not create new - * ones */ - subdev = atomisp_gmin_find_subdev(adapter, board_info); - if (!subdev) { - dev_warn(isp->dev, "Subdev %s not found\n", - board_info->type); + ret = v4l2_device_register_subdev(&isp->v4l2_dev, subdevs->subdev); + if (ret) continue; - } - ret = v4l2_device_register_subdev(&isp->v4l2_dev, subdev); - if (ret) { - dev_warn(isp->dev, "Subdev %s detection fail\n", - board_info->type); - continue; - } - - if (!subdev) { - dev_warn(isp->dev, "Subdev %s detection fail\n", - board_info->type); - continue; - } - - dev_info(isp->dev, "Subdev %s successfully register\n", - board_info->type); switch (subdevs->type) { case RAW_CAMERA: @@ -1008,7 +956,7 @@ static int atomisp_subdev_probe(struct atomisp_device *isp) isp->inputs[isp->input_cnt].type = subdevs->type; isp->inputs[isp->input_cnt].port = subdevs->port; - isp->inputs[isp->input_cnt].camera = subdev; + isp->inputs[isp->input_cnt].camera = subdevs->subdev; isp->inputs[isp->input_cnt].sensor_index = 0; /* * initialize the subdev frame size, then next we can @@ -1020,22 +968,18 @@ static int atomisp_subdev_probe(struct atomisp_device *isp) break; case CAMERA_MOTOR: if (isp->motor) { - dev_warn(isp->dev, - "too many atomisp motors, ignored %s\n", - board_info->type); + dev_warn(isp->dev, "too many atomisp motors\n"); continue; } - isp->motor = subdev; + isp->motor = subdevs->subdev; break; case LED_FLASH: case XENON_FLASH: if (isp->flash) { - dev_warn(isp->dev, - "too many atomisp flash devices, ignored %s\n", - board_info->type); + dev_warn(isp->dev, "too many atomisp flash devices\n"); continue; } - isp->flash = subdev; + isp->flash = subdevs->subdev; break; default: dev_dbg(isp->dev, "unknown subdev probed\n"); @@ -1524,21 +1468,17 @@ static int atomisp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *i isp->max_isr_latency = ATOMISP_MAX_ISR_LATENCY; /* Load isp firmware from user space */ - if (!defer_fw_load) { - isp->firmware = atomisp_load_firmware(isp); - if (!isp->firmware) { - err = -ENOENT; - dev_dbg(&pdev->dev, "Firmware load failed\n"); - goto load_fw_fail; - } + isp->firmware = atomisp_load_firmware(isp); + if (!isp->firmware) { + err = -ENOENT; + dev_dbg(&pdev->dev, "Firmware load failed\n"); + goto load_fw_fail; + } - err = sh_css_check_firmware_version(isp->dev, isp->firmware->data); - if (err) { - dev_dbg(&pdev->dev, "Firmware version check failed\n"); - goto fw_validation_fail; - } - } else { - dev_info(&pdev->dev, "Firmware load will be deferred\n"); + err = sh_css_check_firmware_version(isp->dev, isp->firmware->data); + if (err) { + dev_dbg(&pdev->dev, "Firmware version check failed\n"); + goto fw_validation_fail; } pci_set_master(pdev); @@ -1603,6 +1543,26 @@ static int atomisp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *i /* save the iunit context only once after all the values are init'ed. */ atomisp_save_iunit_reg(isp); + /* + * The atomisp does not use standard PCI power-management through the + * PCI config space. Instead this driver directly tells the P-Unit to + * disable the ISP over the IOSF. The standard PCI subsystem pm_ops will + * try to access the config space before (resume) / after (suspend) this + * driver has turned the ISP on / off, resulting in the following errors: + * + * "Unable to change power state from D0 to D3hot, device inaccessible" + * "Unable to change power state from D3cold to D0, device inaccessible" + * + * To avoid these errors override the pm_domain so that all the PCI + * subsys suspend / resume handling is skipped. + */ + isp->pm_domain.ops.runtime_suspend = atomisp_power_off; + isp->pm_domain.ops.runtime_resume = atomisp_power_on; + isp->pm_domain.ops.suspend = atomisp_suspend; + isp->pm_domain.ops.resume = atomisp_resume; + + dev_pm_domain_set(&pdev->dev, &isp->pm_domain); + pm_runtime_put_noidle(&pdev->dev); pm_runtime_allow(&pdev->dev); @@ -1618,14 +1578,10 @@ static int atomisp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *i } /* Load firmware into ISP memory */ - if (!defer_fw_load) { - err = atomisp_css_load_firmware(isp); - if (err) { - dev_err(&pdev->dev, "Failed to init css.\n"); - goto css_init_fail; - } - } else { - dev_dbg(&pdev->dev, "Skip css init.\n"); + err = atomisp_css_load_firmware(isp); + if (err) { + dev_err(&pdev->dev, "Failed to init css.\n"); + goto css_init_fail; } /* Clear FW image from memory */ release_firmware(isp->firmware); @@ -1645,6 +1601,7 @@ css_init_fail: request_irq_fail: hmm_cleanup(); pm_runtime_get_noresume(&pdev->dev); + dev_pm_domain_set(&pdev->dev, NULL); atomisp_unregister_entities(isp); register_entities_fail: atomisp_uninitialize_modules(isp); @@ -1697,6 +1654,7 @@ static void atomisp_pci_remove(struct pci_dev *pdev) pm_runtime_forbid(&pdev->dev); pm_runtime_get_noresume(&pdev->dev); + dev_pm_domain_set(&pdev->dev, NULL); cpu_latency_qos_remove_request(&isp->pm_qos); atomisp_msi_irq_uninit(isp); @@ -1721,17 +1679,8 @@ static const struct pci_device_id atomisp_pci_tbl[] = { MODULE_DEVICE_TABLE(pci, atomisp_pci_tbl); -static const struct dev_pm_ops atomisp_pm_ops = { - .runtime_suspend = atomisp_power_off, - .runtime_resume = atomisp_power_on, - .suspend = atomisp_suspend, - .resume = atomisp_resume, -}; static struct pci_driver atomisp_pci_driver = { - .driver = { - .pm = &atomisp_pm_ops, - }, .name = "atomisp-isp2", .id_table = atomisp_pci_tbl, .probe = atomisp_pci_probe, |