From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesse Barnes Subject: Re: 2.6.25-rc2 System no longer powers off after suspend-to-disk. Screen becomes green. Date: Wed, 20 Feb 2008 12:09:03 -0800 Message-ID: <200802201209.03807.jesse.barnes@intel.com> References: <200802201118.08468.jesse.barnes@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <200802201118.08468.jesse.barnes@intel.com> Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: suspend-devel-bounces@lists.sourceforge.net Errors-To: suspend-devel-bounces@lists.sourceforge.net To: Jeff Chua Cc: suspend-devel List , Dave Airlie , Greg KH , lkml , "Rafael J. Wysocki" , linux-acpi@vger.kernel.org, Linus Torvalds List-Id: linux-acpi@vger.kernel.org On Wednesday, February 20, 2008 11:18 am Jesse Barnes wrote: > On Wednesday, February 20, 2008 11:10 am Jeff Chua wrote: > > On Feb 21, 2008 2:53 AM, Jesse Barnes wrote: > > > > So, next I'll try "shutdown" to see if it work. I was using > > > > "platform". > > > > > > Ok, that would be good to try. > > > > "shutdown" does power down properly. But still green on resume. > > Ok, so Linus' theory about something later in the resume path trying to > touch video is looking good. > > Rafael, is there anyway to prevent the device shutdown in the hibernate > path? Given the way the PM core works, do we need to set a flag like this? I really hope there's a better way of doing this... Thanks, Jesse diff --git a/drivers/char/drm/i915_drv.c b/drivers/char/drm/i915_drv.c index 4048f39..a2d6242 100644 --- a/drivers/char/drm/i915_drv.c +++ b/drivers/char/drm/i915_drv.c @@ -238,6 +238,13 @@ static void i915_restore_vga(struct drm_device *dev) } +/* + * If we're doing a suspend to disk, we don't want to power off the device. + * Unfortunately, the PM core doesn't tell us if we're headed for a regular + * S3 state or that it's about to shut down the machine, so we use this flag. + */ +static int i915_hibernate; + static int i915_suspend(struct drm_device *dev, pm_message_t state) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -252,6 +259,9 @@ static int i915_suspend(struct drm_device *dev, pm_message_t state) if (state.event == PM_EVENT_PRETHAW) return 0; + if (state.event == PM_EVENT_FREEZE) + i915_hibernate = 1; + pci_save_state(dev->pdev); pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB); @@ -366,7 +376,7 @@ static int i915_suspend(struct drm_device *dev, pm_message_t state) i915_save_vga(dev); - if (state.event == PM_EVENT_SUSPEND) { + if (!i915_hibernate) { /* Shut down the device */ pci_disable_device(dev->pdev); pci_set_power_state(dev->pdev, PCI_D3hot); @@ -385,6 +395,8 @@ static int i915_resume(struct drm_device *dev) if (pci_enable_device(dev->pdev)) return -1; + i915_hibernate = 0; + pci_write_config_byte(dev->pdev, LBB, dev_priv->saveLBB); /* Pipe & plane A info */ ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/