From 82e3b8c130f046b7dd1e7898c10e40edb52fee6d Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Wed, 13 Aug 2014 13:09:46 +0100 Subject: drm/i915: Localise the fbdev console lock frobbing Rather than take and release the console_lock() around a non-existent DRM_I915_FBDEV, move the lock acquisation into the callee where it will be compiled out by the config option entirely. This includes moving the deferred fb_set_suspend() dance and encapsulating it entirely within intel_fbdev.c. v2: Use an integral work item so that we can explicitly flush the work upon suspend/unload. Signed-off-by: Chris Wilson Cc: Daniel Vetter [danvet: Add the flush_work in fbdev_fini per the mailing list discussion. And s/BUG_ON/WARN_ON/ because.] Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_fbdev.c | 44 +++++++++++++++++++++++++++++++++++++- 1 file changed, 43 insertions(+), 1 deletion(-) (limited to 'drivers/gpu/drm/i915/intel_fbdev.c') diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c index f475414671d8..cf052a39558d 100644 --- a/drivers/gpu/drm/i915/intel_fbdev.c +++ b/drivers/gpu/drm/i915/intel_fbdev.c @@ -26,6 +26,7 @@ #include #include +#include #include #include #include @@ -636,6 +637,15 @@ out: return false; } +static void intel_fbdev_suspend_worker(struct work_struct *work) +{ + intel_fbdev_set_suspend(container_of(work, + struct drm_i915_private, + fbdev_suspend_work)->dev, + FBINFO_STATE_RUNNING, + true); +} + int intel_fbdev_init(struct drm_device *dev) { struct intel_fbdev *ifbdev; @@ -662,6 +672,8 @@ int intel_fbdev_init(struct drm_device *dev) } dev_priv->fbdev = ifbdev; + INIT_WORK(&dev_priv->fbdev_suspend_work, intel_fbdev_suspend_worker); + drm_fb_helper_single_add_all_connectors(&ifbdev->helper); return 0; @@ -682,12 +694,14 @@ void intel_fbdev_fini(struct drm_device *dev) if (!dev_priv->fbdev) return; + flush_work(&dev_priv->fbdev_suspend_work); + intel_fbdev_destroy(dev, dev_priv->fbdev); kfree(dev_priv->fbdev); dev_priv->fbdev = NULL; } -void intel_fbdev_set_suspend(struct drm_device *dev, int state) +void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_fbdev *ifbdev = dev_priv->fbdev; @@ -698,6 +712,33 @@ void intel_fbdev_set_suspend(struct drm_device *dev, int state) info = ifbdev->helper.fbdev; + if (synchronous) { + /* Flush any pending work to turn the console on, and then + * wait to turn it off. It must be synchronous as we are + * about to suspend or unload the driver. + * + * Note that from within the work-handler, we cannot flush + * ourselves, so only flush outstanding work upon suspend! + */ + if (state != FBINFO_STATE_RUNNING) + flush_work(&dev_priv->fbdev_suspend_work); + console_lock(); + } else { + /* + * The console lock can be pretty contented on resume due + * to all the printk activity. Try to keep it out of the hot + * path of resume if possible. + */ + WARN_ON(state != FBINFO_STATE_RUNNING); + if (!console_trylock()) { + /* Don't block our own workqueue as this can + * be run in parallel with other i915.ko tasks. + */ + schedule_work(&dev_priv->fbdev_suspend_work); + return; + } + } + /* On resume from hibernation: If the object is shmemfs backed, it has * been restored from swap. If the object is stolen however, it will be * full of whatever garbage was left in there. @@ -706,6 +747,7 @@ void intel_fbdev_set_suspend(struct drm_device *dev, int state) memset_io(info->screen_base, 0, info->screen_size); fb_set_suspend(info, state); + console_unlock(); } void intel_fbdev_output_poll_changed(struct drm_device *dev) -- cgit v1.2.3 From d84a0f3280c48fa28857de59a47e2fbf8753969f Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 18 Aug 2014 10:35:29 -0700 Subject: drm/i915: honour forced connector modes MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In the move over to use BIOS connector configs, we lost the ability to force a specific set of connectors on or off. Try to remedy that by dropping back to the old behavior if we detect a hard coded connector config that tries to enable a connector (disabling is easy!). Based on earlier patches by Jesse Barnes. v2: Remove Jesse's patch Reported-by: Ville Syrjälä Signed-off-by: Chris Wilson Cc: Jesse Barnes Cc: Ville Syrjälä Signed-off-by: Rodrigo Vivi Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_fbdev.c | 33 ++++++++++++--------------------- 1 file changed, 12 insertions(+), 21 deletions(-) (limited to 'drivers/gpu/drm/i915/intel_fbdev.c') diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c index cf052a39558d..b992133824f2 100644 --- a/drivers/gpu/drm/i915/intel_fbdev.c +++ b/drivers/gpu/drm/i915/intel_fbdev.c @@ -332,24 +332,6 @@ static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, int num_connectors_enabled = 0; int num_connectors_detected = 0; - /* - * If the user specified any force options, just bail here - * and use that config. - */ - for (i = 0; i < fb_helper->connector_count; i++) { - struct drm_fb_helper_connector *fb_conn; - struct drm_connector *connector; - - fb_conn = fb_helper->connector_info[i]; - connector = fb_conn->connector; - - if (!enabled[i]) - continue; - - if (connector->force != DRM_FORCE_UNSPECIFIED) - return false; - } - save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool), GFP_KERNEL); if (!save_enabled) @@ -375,8 +357,18 @@ static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, continue; } + if (connector->force == DRM_FORCE_OFF) { + DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", + connector->name); + enabled[i] = false; + continue; + } + encoder = connector->encoder; if (!encoder || WARN_ON(!encoder->crtc)) { + if (connector->force > DRM_FORCE_OFF) + goto bail; + DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", connector->name); enabled[i] = false; @@ -395,8 +387,7 @@ static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, for (j = 0; j < fb_helper->connector_count; j++) { if (crtcs[j] == new_crtc) { DRM_DEBUG_KMS("fallback: cloned configuration\n"); - fallback = true; - goto out; + goto bail; } } @@ -467,8 +458,8 @@ static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, fallback = true; } -out: if (fallback) { +bail: DRM_DEBUG_KMS("Not using firmware configuration\n"); memcpy(enabled, save_enabled, dev->mode_config.num_connector); kfree(save_enabled); -- cgit v1.2.3 From d1d70677e165826f3fa9966e1b7ec3765d7c0fb7 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Wed, 28 May 2014 14:39:03 -0700 Subject: drm/i915: make fbdev initialization asynchronous v2 This gets us out of our init code and out to userspace quite a bit faster, but does open us up to some bugs given the state of our init time locking. v2: switch to async_schedule (Chris) check with lockdep, seems happy (Jesse) move hotplug enable flag set to fbdev_initial_config (Jesse) Signed-off-by: Jesse Barnes Reviewed-by: Chris Wilson [danvet: Rebase on top of the dev_priv->enable_hotplug_processing removal.] Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_fbdev.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm/i915/intel_fbdev.c') diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c index b992133824f2..9b584f3fbb99 100644 --- a/drivers/gpu/drm/i915/intel_fbdev.c +++ b/drivers/gpu/drm/i915/intel_fbdev.c @@ -24,6 +24,7 @@ * David Airlie */ +#include #include #include #include @@ -670,9 +671,9 @@ int intel_fbdev_init(struct drm_device *dev) return 0; } -void intel_fbdev_initial_config(struct drm_device *dev) +void intel_fbdev_initial_config(void *data, async_cookie_t cookie) { - struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_i915_private *dev_priv = data; struct intel_fbdev *ifbdev = dev_priv->fbdev; /* Due to peculiar init order wrt to hpd handling this is separate. */ @@ -687,6 +688,7 @@ void intel_fbdev_fini(struct drm_device *dev) flush_work(&dev_priv->fbdev_suspend_work); + async_synchronize_full(); intel_fbdev_destroy(dev, dev_priv->fbdev); kfree(dev_priv->fbdev); dev_priv->fbdev = NULL; -- cgit v1.2.3