From 949f7c7d5fc4277e1ca91dbee32ceb469bbb1349 Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Mon, 5 Mar 2018 13:36:08 +0100 Subject: [PATCH] drm/i915: Handle changing enable_fbc parameter at runtime better. If i915.enable_fbc is cleared at runtime, but FBC was previously enabled then we don't disable FBC until the next time the crtc is disabled. Make sure that if the module param is changed, we disable FBC in intel_fbc_post_update so we never have to worry about disabling. Signed-off-by: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/20180305123608.20665-1-maarten.lankhorst@linux.intel.com Reviewed-by: Rodrigo Vivi --- drivers/gpu/drm/i915/intel_fbc.c | 62 ++++++++++++++++++-------------- 1 file changed, 36 insertions(+), 26 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c index 38a5535a5c63..707d49c12638 100644 --- a/drivers/gpu/drm/i915/intel_fbc.c +++ b/drivers/gpu/drm/i915/intel_fbc.c @@ -960,6 +960,30 @@ void intel_fbc_pre_update(struct intel_crtc *crtc, mutex_unlock(&fbc->lock); } +/** + * __intel_fbc_disable - disable FBC + * @dev_priv: i915 device instance + * + * This is the low level function that actually disables FBC. Callers should + * grab the FBC lock. + */ +static void __intel_fbc_disable(struct drm_i915_private *dev_priv) +{ + struct intel_fbc *fbc = &dev_priv->fbc; + struct intel_crtc *crtc = fbc->crtc; + + WARN_ON(!mutex_is_locked(&fbc->lock)); + WARN_ON(!fbc->enabled); + WARN_ON(fbc->active); + + DRM_DEBUG_KMS("Disabling FBC on pipe %c\n", pipe_name(crtc->pipe)); + + __intel_fbc_cleanup_cfb(dev_priv); + + fbc->enabled = false; + fbc->crtc = NULL; +} + static void __intel_fbc_post_update(struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); @@ -971,6 +995,13 @@ static void __intel_fbc_post_update(struct intel_crtc *crtc) if (!fbc->enabled || fbc->crtc != crtc) return; + if (!i915_modparams.enable_fbc) { + intel_fbc_deactivate(dev_priv, "disabled at runtime per module param"); + __intel_fbc_disable(dev_priv); + + return; + } + if (!intel_fbc_can_activate(crtc)) { WARN_ON(fbc->active); return; @@ -1174,31 +1205,6 @@ void intel_fbc_enable(struct intel_crtc *crtc, mutex_unlock(&fbc->lock); } -/** - * __intel_fbc_disable - disable FBC - * @dev_priv: i915 device instance - * - * This is the low level function that actually disables FBC. Callers should - * grab the FBC lock. - */ -static void __intel_fbc_disable(struct drm_i915_private *dev_priv) -{ - struct intel_fbc *fbc = &dev_priv->fbc; - struct intel_crtc *crtc = fbc->crtc; - - WARN_ON(!mutex_is_locked(&fbc->lock)); - WARN_ON(!fbc->enabled); - WARN_ON(fbc->active); - WARN_ON(crtc->active); - - DRM_DEBUG_KMS("Disabling FBC on pipe %c\n", pipe_name(crtc->pipe)); - - __intel_fbc_cleanup_cfb(dev_priv); - - fbc->enabled = false; - fbc->crtc = NULL; -} - /** * intel_fbc_disable - disable FBC if it's associated with crtc * @crtc: the CRTC @@ -1213,6 +1219,8 @@ void intel_fbc_disable(struct intel_crtc *crtc) if (!fbc_supported(dev_priv)) return; + WARN_ON(crtc->active); + mutex_lock(&fbc->lock); if (fbc->crtc == crtc) __intel_fbc_disable(dev_priv); @@ -1235,8 +1243,10 @@ void intel_fbc_global_disable(struct drm_i915_private *dev_priv) return; mutex_lock(&fbc->lock); - if (fbc->enabled) + if (fbc->enabled) { + WARN_ON(fbc->crtc->active); __intel_fbc_disable(dev_priv); + } mutex_unlock(&fbc->lock); cancel_work_sync(&fbc->work.work); -- GitLab