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i915: ignore lid open event when resuming 

i915 driver needs to do modeset when
1. system resumes from sleep
2. lid is opened

In PM_SUSPEND_MEM state, all the GPEs are cleared when system resumes,
thus it is the i915_resume code does the modeset rather than intel_lid_notify().

But in PM_SUSPEND_FREEZE state, this will be broken because
system is still responsive to the lid events.
1. When we close the lid in Freeze state, intel_lid_notify() sets modeset_on_lid.
2. When we reopen the lid, intel_lid_notify() will do a modeset,
   before the system is resumed.
here is the error log,

[92146.548074] WARNING: at drivers/gpu/drm/i915/intel_display.c:1028 intel_wait_for_pipe_off+0x184/0x190 [i915]()
[92146.548076] Hardware name: VGN-Z540N
[92146.548078] pipe_off wait timed out
[92146.548167] Modules linked in: hid_generic usbhid hid snd_hda_codec_realtek snd_hda_intel snd_hda_codec parport_pc snd_hwdep ppdev snd_pcm_oss i915 snd_mixer_oss snd_pcm arc4 iwldvm snd_seq_dummy mac80211 snd_seq_oss snd_seq_midi fbcon tileblit font bitblit softcursor drm_kms_helper snd_rawmidi snd_seq_midi_event coretemp drm snd_seq kvm btusb bluetooth snd_timer iwlwifi pcmcia tpm_infineon i2c_algo_bit joydev snd_seq_device intel_agp cfg80211 snd intel_gtt yenta_socket pcmcia_rsrc sony_laptop agpgart microcode psmouse tpm_tis serio_raw mxm_wmi soundcore snd_page_alloc tpm acpi_cpufreq lpc_ich pcmcia_core tpm_bios mperf processor lp parport firewire_ohci firewire_core crc_itu_t sdhci_pci sdhci thermal e1000e
[92146.548173] Pid: 4304, comm: kworker/0:0 Tainted: G        W    3.8.0-rc3-s0i3-v3-test+ #9
[92146.548175] Call Trace:
[92146.548189]  [<c10378e2>] warn_slowpath_common+0x72/0xa0
[92146.548227]  [<f86398b4>] ? intel_wait_for_pipe_off+0x184/0x190 [i915]
[92146.548263]  [<f86398b4>] ? intel_wait_for_pipe_off+0x184/0x190 [i915]
[92146.548270]  [<c10379b3>] warn_slowpath_fmt+0x33/0x40
[92146.548307]  [<f86398b4>] intel_wait_for_pipe_off+0x184/0x190 [i915]
[92146.548344]  [<f86399c2>] intel_disable_pipe+0x102/0x190 [i915]
[92146.548380]  [<f8639ea4>] ? intel_disable_plane+0x64/0x80 [i915]
[92146.548417]  [<f8639f7c>] i9xx_crtc_disable+0xbc/0x150 [i915]
[92146.548456]  [<f863ebee>] intel_crtc_update_dpms+0x5e/0x90 [i915]
[92146.548493]  [<f86437cf>] intel_modeset_setup_hw_state+0x42f/0x8f0 [i915]
[92146.548535]  [<f8645b0b>] intel_lid_notify+0x9b/0xc0 [i915]
[92146.548543]  [<c15610d3>] notifier_call_chain+0x43/0x60
[92146.548550]  [<c105d1e1>] __blocking_notifier_call_chain+0x41/0x80
[92146.548556]  [<c105d23f>] blocking_notifier_call_chain+0x1f/0x30
[92146.548563]  [<c131a684>] acpi_lid_send_state+0x78/0xa4
[92146.548569]  [<c131aa9e>] acpi_button_notify+0x3b/0xf1
[92146.548577]  [<c12df56a>] ? acpi_os_execute+0x17/0x19
[92146.548582]  [<c12e591a>] ? acpi_ec_sync_query+0xa5/0xbc
[92146.548589]  [<c12e2b82>] acpi_device_notify+0x16/0x18
[92146.548595]  [<c12f4904>] acpi_ev_notify_dispatch+0x38/0x4f
[92146.548600]  [<c12df0e8>] acpi_os_execute_deferred+0x20/0x2b
[92146.548607]  [<c1051208>] process_one_work+0x128/0x3f0
[92146.548613]  [<c1564f73>] ? common_interrupt+0x33/0x38
[92146.548618]  [<c104f8c0>] ? wake_up_worker+0x30/0x30
[92146.548624]  [<c12df0c8>] ? acpi_os_wait_events_complete+0x1e/0x1e
[92146.548629]  [<c10524f9>] worker_thread+0x119/0x3b0
[92146.548634]  [<c10523e0>] ? manage_workers+0x240/0x240
[92146.548640]  [<c1056e84>] kthread+0x94/0xa0
[92146.548647]  [<c1060000>] ? ftrace_raw_output_sched_stat_runtime+0x70/0xf0
[92146.548652]  [<c15649b7>] ret_from_kernel_thread+0x1b/0x28
[92146.548658]  [<c1056df0>] ? kthread_create_on_node+0xc0/0xc0

three different modeset flags are introduced in this patch
MODESET_ON_LID_OPEN: do modeset on next lid open event
MODESET_DONE:  modeset already done
MODESET_SUSPENDED:  suspended, only do modeset when system is resumed

In this way,
1. when lid is closed, MODESET_ON_LID_OPEN is set so that
   we'll do modeset on next lid open event.
2. when lid is opened, MODESET_DONE is set
   so that duplicate lid open events will be ignored.
3. when system suspends, MODESET_SUSPENDED is set.
   In this case, we will not do modeset on any lid events.

Plus, locking mechanism is also introduced to avoid racing.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Zhang Rui 2013-02-05 15:41:53 +08:00 committed by Daniel Vetter
parent 7083e05072
commit b8efb17b3d
4 changed files with 37 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/i915/i915_dma.c
View File

@ -1610,6 +1610,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
mutex_init(&dev_priv->dpio_lock);
mutex_init(&dev_priv->rps.hw_lock);
mutex_init(&dev_priv->modeset_restore_lock);
if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev))
dev_priv->num_pipe = 3;

13
drivers/gpu/drm/i915/i915_drv.c
View File

@ -470,6 +470,11 @@ static int i915_drm_freeze(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
/* ignore lid events during suspend */
mutex_lock(&dev_priv->modeset_restore_lock);
dev_priv->modeset_restore = MODESET_SUSPENDED;
mutex_unlock(&dev_priv->modeset_restore_lock);
intel_set_power_well(dev, true);
drm_kms_helper_poll_disable(dev);
@ -496,9 +501,6 @@ static int i915_drm_freeze(struct drm_device *dev)
intel_opregion_fini(dev);
/* Modeset on resume, not lid events */
dev_priv->modeset_on_lid = 0;
console_lock();
intel_fbdev_set_suspend(dev, 1);
console_unlock();
@ -574,8 +576,6 @@ static int __i915_drm_thaw(struct drm_device *dev)
intel_opregion_init(dev);
dev_priv->modeset_on_lid = 0;
/*
* The console lock can be pretty contented on resume due
* to all the printk activity. Try to keep it out of the hot
@ -588,6 +588,9 @@ static int __i915_drm_thaw(struct drm_device *dev)
schedule_work(&dev_priv->console_resume_work);
}
mutex_lock(&dev_priv->modeset_restore_lock);
dev_priv->modeset_restore = MODESET_DONE;
mutex_unlock(&dev_priv->modeset_restore_lock);
return error;
}

10
drivers/gpu/drm/i915/i915_drv.h
View File

@ -846,6 +846,12 @@ struct i915_gpu_error {
unsigned int stop_rings;
};
enum modeset_restore {
MODESET_ON_LID_OPEN,
MODESET_DONE,
MODESET_SUSPENDED,
};
typedef struct drm_i915_private {
struct drm_device *dev;
struct kmem_cache *slab;
@ -967,8 +973,8 @@ typedef struct drm_i915_private {
unsigned long quirks;
/* Register state */
bool modeset_on_lid;
enum modeset_restore modeset_restore;
struct mutex modeset_restore_lock;
struct i915_gtt gtt;

33
drivers/gpu/drm/i915/intel_lvds.c
View File

@ -547,13 +547,14 @@ static const struct dmi_system_id intel_no_modeset_on_lid[] = {
};
/*
* Lid events. Note the use of 'modeset_on_lid':
* - we set it on lid close, and reset it on open
* Lid events. Note the use of 'modeset':
* - we set it to MODESET_ON_LID_OPEN on lid close,
* and set it to MODESET_DONE on open
* - we use it as a "only once" bit (ie we ignore
* duplicate events where it was already properly
* set/reset)
* - the suspend/resume paths will also set it to
* zero, since they restore the mode ("lid open").
* duplicate events where it was already properly set)
* - the suspend/resume paths will set it to
* MODESET_SUSPENDED and ignore the lid open event,
* because they restore the mode ("lid open").
*/
static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
void *unused)
@ -567,6 +568,9 @@ static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
return NOTIFY_OK;
mutex_lock(&dev_priv->modeset_restore_lock);
if (dev_priv->modeset_restore == MODESET_SUSPENDED)
goto exit;
/*
* check and update the status of LVDS connector after receiving
* the LID nofication event.
@ -575,21 +579,24 @@ static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
/* Don't force modeset on machines where it causes a GPU lockup */
if (dmi_check_system(intel_no_modeset_on_lid))
return NOTIFY_OK;
goto exit;
if (!acpi_lid_open()) {
dev_priv->modeset_on_lid = 1;
return NOTIFY_OK;
/* do modeset on next lid open event */
dev_priv->modeset_restore = MODESET_ON_LID_OPEN;
goto exit;
}
if (!dev_priv->modeset_on_lid)
return NOTIFY_OK;
dev_priv->modeset_on_lid = 0;
if (dev_priv->modeset_restore == MODESET_DONE)
goto exit;
drm_modeset_lock_all(dev);
intel_modeset_setup_hw_state(dev, true);
drm_modeset_unlock_all(dev);
dev_priv->modeset_restore = MODESET_DONE;
exit:
mutex_unlock(&dev_priv->modeset_restore_lock);
return NOTIFY_OK;
}