From: Zhang Rui Date: Tue, 5 Feb 2013 07:41:53 +0000 (+0800) Subject: i915: ignore lid open event when resuming X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=b8efb17b3d687695b81485f606fc4e6c35a50f9a;p=openwrt%2Fstaging%2Fblogic.git 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] [] warn_slowpath_common+0x72/0xa0 [92146.548227] [] ? intel_wait_for_pipe_off+0x184/0x190 [i915] [92146.548263] [] ? intel_wait_for_pipe_off+0x184/0x190 [i915] [92146.548270] [] warn_slowpath_fmt+0x33/0x40 [92146.548307] [] intel_wait_for_pipe_off+0x184/0x190 [i915] [92146.548344] [] intel_disable_pipe+0x102/0x190 [i915] [92146.548380] [] ? intel_disable_plane+0x64/0x80 [i915] [92146.548417] [] i9xx_crtc_disable+0xbc/0x150 [i915] [92146.548456] [] intel_crtc_update_dpms+0x5e/0x90 [i915] [92146.548493] [] intel_modeset_setup_hw_state+0x42f/0x8f0 [i915] [92146.548535] [] intel_lid_notify+0x9b/0xc0 [i915] [92146.548543] [] notifier_call_chain+0x43/0x60 [92146.548550] [] __blocking_notifier_call_chain+0x41/0x80 [92146.548556] [] blocking_notifier_call_chain+0x1f/0x30 [92146.548563] [] acpi_lid_send_state+0x78/0xa4 [92146.548569] [] acpi_button_notify+0x3b/0xf1 [92146.548577] [] ? acpi_os_execute+0x17/0x19 [92146.548582] [] ? acpi_ec_sync_query+0xa5/0xbc [92146.548589] [] acpi_device_notify+0x16/0x18 [92146.548595] [] acpi_ev_notify_dispatch+0x38/0x4f [92146.548600] [] acpi_os_execute_deferred+0x20/0x2b [92146.548607] [] process_one_work+0x128/0x3f0 [92146.548613] [] ? common_interrupt+0x33/0x38 [92146.548618] [] ? wake_up_worker+0x30/0x30 [92146.548624] [] ? acpi_os_wait_events_complete+0x1e/0x1e [92146.548629] [] worker_thread+0x119/0x3b0 [92146.548634] [] ? manage_workers+0x240/0x240 [92146.548640] [] kthread+0x94/0xa0 [92146.548647] [] ? ftrace_raw_output_sched_stat_runtime+0x70/0xf0 [92146.548652] [] ret_from_kernel_thread+0x1b/0x28 [92146.548658] [] ? 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 Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index cf0610330135..4fa6beb14c77 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -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; diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index d159d7a402e9..c5b8c81b9440 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -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; } diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index c338b4443fd9..4e5a3776a3ea 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -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; diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c index 5e3f08e3fd8b..bff78a3ec37b 100644 --- a/drivers/gpu/drm/i915/intel_lvds.c +++ b/drivers/gpu/drm/i915/intel_lvds.c @@ -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; }