On Saturday, 23 of February 2008, Jeff Chua wrote: > On Sat, Feb 23, 2008 at 10:07 AM, Linus Torvalds > <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > > > On Sat, 23 Feb 2008, Rafael J. Wysocki wrote: > > > OK, please have a look at the modified patch below. > > > > All right, I'm fine with it. Now we just need to confirm that it works for > > people.. > > Looks good. Applied Rafael patch on top of your latest git tree that > has Jesse's i915 fix. > > No green screen. Tested with STD (platform), STR, and plain echo mem > > /sys/power/state. Thanks for testing. Below is the final version of the patch with a changelog etc. Thanks, Rafael --- From: Rafael J. Wysocki <rjw@xxxxxxx> During the last step of hibernation in the "platform" mode (with the help of ACPI) we use the suspend code, including the devices' ->suspend() methods, to prepare the system for entering the ACPI S4 system sleep state. At least for some devices the operations performed by the ->suspend() callback in that case must be different from its operations during regular suspend. For this reason, introduce the new PM event type PM_EVENT_HIBERNATE and pass it to the device drivers' ->suspend() methods during the last phase of hibernation, so that they can distinguish this case and handle it as appropriate. Modify the drivers that handle PM_EVENT_SUSPEND in a special way and need to handle PM_EVENT_HIBERNATE in the same way. These changes are necessary to fix a hibernation regression related to the i915 driver (ref. http://lkml.org/lkml/2008/2/22/488). Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx> Acked-by: Pavel Machek <pavel@xxxxxx> Tested-by: Jeff Chua <jeff.chua.linux@xxxxxxxxx> --- Documentation/power/devices.txt | 13 ++++++++----- drivers/ata/ahci.c | 2 +- drivers/ata/ata_piix.c | 2 +- drivers/ata/libata-core.c | 2 +- drivers/ide/ppc/pmac.c | 4 ++-- drivers/macintosh/mediabay.c | 3 ++- drivers/pci/pci.c | 1 + drivers/scsi/aic7xxx/aic79xx_osm_pci.c | 2 +- drivers/scsi/aic7xxx/aic7xxx_osm_pci.c | 2 +- drivers/scsi/mesh.c | 1 + drivers/scsi/sd.c | 3 +-- drivers/usb/host/sl811-hcd.c | 1 + drivers/usb/host/u132-hcd.c | 11 ++++++++--- drivers/video/chipsfb.c | 2 +- drivers/video/nvidia/nvidia.c | 2 +- include/linux/pm.h | 9 ++++++++- kernel/power/disk.c | 4 ++-- net/rfkill/rfkill.c | 2 +- 18 files changed, 42 insertions(+), 24 deletions(-) Index: linux-2.6/kernel/power/disk.c =================================================================== --- linux-2.6.orig/kernel/power/disk.c +++ linux-2.6/kernel/power/disk.c @@ -391,7 +391,7 @@ int hibernation_platform_enter(void) goto Close; suspend_console(); - error = device_suspend(PMSG_SUSPEND); + error = device_suspend(PMSG_HIBERNATE); if (error) goto Resume_console; @@ -404,7 +404,7 @@ int hibernation_platform_enter(void) goto Finish; local_irq_disable(); - error = device_power_down(PMSG_SUSPEND); + error = device_power_down(PMSG_HIBERNATE); if (!error) { hibernation_ops->enter(); /* We should never get here */ Index: linux-2.6/include/linux/pm.h =================================================================== --- linux-2.6.orig/include/linux/pm.h +++ linux-2.6/include/linux/pm.h @@ -143,6 +143,9 @@ typedef struct pm_message { * the upcoming system state (such as PCI_D3hot), and enable * wakeup events as appropriate. * + * HIBERNATE Enter a low power device state appropriate for the hibernation + * state (eg. ACPI S4) and enable wakeup events as appropriate. + * * FREEZE Quiesce operations so that a consistent image can be saved; * but do NOT otherwise enter a low power device state, and do * NOT emit system wakeup events. @@ -166,11 +169,15 @@ typedef struct pm_message { #define PM_EVENT_ON 0 #define PM_EVENT_FREEZE 1 #define PM_EVENT_SUSPEND 2 -#define PM_EVENT_PRETHAW 3 +#define PM_EVENT_HIBERNATE 4 +#define PM_EVENT_PRETHAW 8 + +#define PM_EVENT_SLEEP (PM_EVENT_SUSPEND | PM_EVENT_HIBERNATE) #define PMSG_FREEZE ((struct pm_message){ .event = PM_EVENT_FREEZE, }) #define PMSG_PRETHAW ((struct pm_message){ .event = PM_EVENT_PRETHAW, }) #define PMSG_SUSPEND ((struct pm_message){ .event = PM_EVENT_SUSPEND, }) +#define PMSG_HIBERNATE ((struct pm_message){ .event = PM_EVENT_HIBERNATE, }) #define PMSG_ON ((struct pm_message){ .event = PM_EVENT_ON, }) struct dev_pm_info { Index: linux-2.6/drivers/ata/ahci.c =================================================================== --- linux-2.6.orig/drivers/ata/ahci.c +++ linux-2.6/drivers/ata/ahci.c @@ -1932,7 +1932,7 @@ static int ahci_pci_device_suspend(struc void __iomem *mmio = host->iomap[AHCI_PCI_BAR]; u32 ctl; - if (mesg.event == PM_EVENT_SUSPEND) { + if (mesg.event & PM_EVENT_SLEEP) { /* AHCI spec rev1.1 section 8.3.3: * Software must disable interrupts prior to requesting a * transition of the HBA to D3 state. Index: linux-2.6/drivers/ata/ata_piix.c =================================================================== --- linux-2.6.orig/drivers/ata/ata_piix.c +++ linux-2.6/drivers/ata/ata_piix.c @@ -1339,7 +1339,7 @@ static int piix_pci_device_suspend(struc * cycles and power trying to do something to the sleeping * beauty. */ - if (piix_broken_suspend() && mesg.event == PM_EVENT_SUSPEND) { + if (piix_broken_suspend() && (mesg.event & PM_EVENT_SLEEP)) { pci_save_state(pdev); /* mark its power state as "unknown", since we don't Index: linux-2.6/drivers/ata/libata-core.c =================================================================== --- linux-2.6.orig/drivers/ata/libata-core.c +++ linux-2.6/drivers/ata/libata-core.c @@ -7368,7 +7368,7 @@ void ata_pci_device_do_suspend(struct pc pci_save_state(pdev); pci_disable_device(pdev); - if (mesg.event == PM_EVENT_SUSPEND) + if (mesg.event & PM_EVENT_SLEEP) pci_set_power_state(pdev, PCI_D3hot); } Index: linux-2.6/drivers/ide/ppc/pmac.c =================================================================== --- linux-2.6.orig/drivers/ide/ppc/pmac.c +++ linux-2.6/drivers/ide/ppc/pmac.c @@ -1254,7 +1254,7 @@ pmac_ide_macio_suspend(struct macio_dev int rc = 0; if (mesg.event != mdev->ofdev.dev.power.power_state.event - && mesg.event == PM_EVENT_SUSPEND) { + && (mesg.event & PM_EVENT_SLEEP)) { rc = pmac_ide_do_suspend(hwif); if (rc == 0) mdev->ofdev.dev.power.power_state = mesg; @@ -1364,7 +1364,7 @@ pmac_ide_pci_suspend(struct pci_dev *pde int rc = 0; if (mesg.event != pdev->dev.power.power_state.event - && mesg.event == PM_EVENT_SUSPEND) { + && (mesg.event & PM_EVENT_SLEEP)) { rc = pmac_ide_do_suspend(hwif); if (rc == 0) pdev->dev.power.power_state = mesg; Index: linux-2.6/drivers/macintosh/mediabay.c =================================================================== --- linux-2.6.orig/drivers/macintosh/mediabay.c +++ linux-2.6/drivers/macintosh/mediabay.c @@ -698,7 +698,8 @@ static int media_bay_suspend(struct maci { struct media_bay_info *bay = macio_get_drvdata(mdev); - if (state.event != mdev->ofdev.dev.power.power_state.event && state.event == PM_EVENT_SUSPEND) { + if (state.event != mdev->ofdev.dev.power.power_state.event + && (state.event & PM_EVENT_SLEEP)) { down(&bay->lock); bay->sleeping = 1; set_mb_power(bay, 0); Index: linux-2.6/drivers/pci/pci.c =================================================================== --- linux-2.6.orig/drivers/pci/pci.c +++ linux-2.6/drivers/pci/pci.c @@ -554,6 +554,7 @@ pci_power_t pci_choose_state(struct pci_ case PM_EVENT_PRETHAW: /* REVISIT both freeze and pre-thaw "should" use D0 */ case PM_EVENT_SUSPEND: + case PM_EVENT_HIBERNATE: return PCI_D3hot; default: printk("Unrecognized suspend event %d\n", state.event); Index: linux-2.6/drivers/scsi/aic7xxx/aic79xx_osm_pci.c =================================================================== --- linux-2.6.orig/drivers/scsi/aic7xxx/aic79xx_osm_pci.c +++ linux-2.6/drivers/scsi/aic7xxx/aic79xx_osm_pci.c @@ -89,7 +89,7 @@ ahd_linux_pci_dev_suspend(struct pci_dev pci_save_state(pdev); pci_disable_device(pdev); - if (mesg.event == PM_EVENT_SUSPEND) + if (mesg.event & PM_EVENT_SLEEP) pci_set_power_state(pdev, PCI_D3hot); return rc; Index: linux-2.6/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c =================================================================== --- linux-2.6.orig/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c +++ linux-2.6/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c @@ -134,7 +134,7 @@ ahc_linux_pci_dev_suspend(struct pci_dev pci_save_state(pdev); pci_disable_device(pdev); - if (mesg.event == PM_EVENT_SUSPEND) + if (mesg.event & PM_EVENT_SLEEP) pci_set_power_state(pdev, PCI_D3hot); return rc; Index: linux-2.6/drivers/scsi/mesh.c =================================================================== --- linux-2.6.orig/drivers/scsi/mesh.c +++ linux-2.6/drivers/scsi/mesh.c @@ -1759,6 +1759,7 @@ static int mesh_suspend(struct macio_dev switch (mesg.event) { case PM_EVENT_SUSPEND: + case PM_EVENT_HIBERNATE: case PM_EVENT_FREEZE: break; default: Index: linux-2.6/drivers/scsi/sd.c =================================================================== --- linux-2.6.orig/drivers/scsi/sd.c +++ linux-2.6/drivers/scsi/sd.c @@ -1835,8 +1835,7 @@ static int sd_suspend(struct device *dev goto done; } - if (mesg.event == PM_EVENT_SUSPEND && - sdkp->device->manage_start_stop) { + if ((mesg.event & PM_EVENT_SLEEP) && sdkp->device->manage_start_stop) { sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); ret = sd_start_stop_device(sdkp, 0); } Index: linux-2.6/drivers/usb/host/sl811-hcd.c =================================================================== --- linux-2.6.orig/drivers/usb/host/sl811-hcd.c +++ linux-2.6/drivers/usb/host/sl811-hcd.c @@ -1766,6 +1766,7 @@ sl811h_suspend(struct platform_device *d retval = sl811h_bus_suspend(hcd); break; case PM_EVENT_SUSPEND: + case PM_EVENT_HIBERNATE: case PM_EVENT_PRETHAW: /* explicitly discard hw state */ port_power(sl811, 0); break; Index: linux-2.6/drivers/usb/host/u132-hcd.c =================================================================== --- linux-2.6.orig/drivers/usb/host/u132-hcd.c +++ linux-2.6/drivers/usb/host/u132-hcd.c @@ -3214,14 +3214,19 @@ static int u132_suspend(struct platform_ return -ESHUTDOWN; } else { int retval = 0; - if (state.event == PM_EVENT_FREEZE) { + + switch (state.event) { + case PM_EVENT_FREEZE: retval = u132_bus_suspend(hcd); - } else if (state.event == PM_EVENT_SUSPEND) { + break; + case PM_EVENT_SUSPEND: + case PM_EVENT_HIBERNATE: int ports = MAX_U132_PORTS; while (ports-- > 0) { port_power(u132, ports, 0); } - } + break; + } if (retval == 0) pdev->dev.power.power_state = state; return retval; Index: linux-2.6/drivers/video/chipsfb.c =================================================================== --- linux-2.6.orig/drivers/video/chipsfb.c +++ linux-2.6/drivers/video/chipsfb.c @@ -459,7 +459,7 @@ static int chipsfb_pci_suspend(struct pc if (state.event == pdev->dev.power.power_state.event) return 0; - if (state.event != PM_EVENT_SUSPEND) + if (!(state.event & PM_EVENT_SLEEP)) goto done; acquire_console_sem(); Index: linux-2.6/drivers/video/nvidia/nvidia.c =================================================================== --- linux-2.6.orig/drivers/video/nvidia/nvidia.c +++ linux-2.6/drivers/video/nvidia/nvidia.c @@ -1066,7 +1066,7 @@ static int nvidiafb_suspend(struct pci_d acquire_console_sem(); par->pm_state = mesg.event; - if (mesg.event == PM_EVENT_SUSPEND) { + if (mesg.event & PM_EVENT_SLEEP) { fb_set_suspend(info, 1); nvidiafb_blank(FB_BLANK_POWERDOWN, info); nvidia_write_regs(par, &par->SavedReg); Index: linux-2.6/net/rfkill/rfkill.c =================================================================== --- linux-2.6.orig/net/rfkill/rfkill.c +++ linux-2.6/net/rfkill/rfkill.c @@ -232,7 +232,7 @@ static int rfkill_suspend(struct device struct rfkill *rfkill = to_rfkill(dev); if (dev->power.power_state.event != state.event) { - if (state.event == PM_EVENT_SUSPEND) { + if (state.event & PM_EVENT_SLEEP) { mutex_lock(&rfkill->mutex); if (rfkill->state == RFKILL_STATE_ON) Index: linux-2.6/Documentation/power/devices.txt =================================================================== --- linux-2.6.orig/Documentation/power/devices.txt +++ linux-2.6/Documentation/power/devices.txt @@ -310,9 +310,12 @@ used with suspend-to-disk: PM_EVENT_SUSPEND -- quiesce the driver and put hardware into a low-power state. When used with system sleep states like "suspend-to-RAM" or "standby", the upcoming resume() call will often be able to rely on - state kept in hardware, or issue system wakeup events. When used - instead with suspend-to-disk, few devices support this capability; - most are completely powered off. + state kept in hardware, or issue system wakeup events. + + PM_EVENT_HIBERNATE -- Put hardware into a low-power state and enable wakeup + events as appropriate. It is only used with hibernation + (suspend-to-disk) and few devices are able to wake up the system from + this state; most are completely powered off. PM_EVENT_FREEZE -- quiesce the driver, but don't necessarily change into any low power mode. A system snapshot is about to be taken, often @@ -329,8 +332,8 @@ used with suspend-to-disk: wakeup events nor DMA are allowed. To enter "standby" (ACPI S1) or "Suspend to RAM" (STR, ACPI S3) states, or -the similarly named APM states, only PM_EVENT_SUSPEND is used; for "Suspend -to Disk" (STD, hibernate, ACPI S4), all of those event codes are used. +the similarly named APM states, only PM_EVENT_SUSPEND is used; the other event +codes are used for hibernation ("Suspend to Disk", STD, ACPI S4). There's also PM_EVENT_ON, a value which never appears as a suspend event but is sometimes used to record the "not suspended" device state. _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
