From: Ville Syrjälä Date: Wed, 6 Aug 2014 11:49:45 +0000 (+0300) Subject: drm/i915: Warn if drm_vblank_get() still works after drm_vblank_off() X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=08c71e5e817a956389af5da5e99ab3e26d5c673d;p=linux-beck.git drm/i915: Warn if drm_vblank_get() still works after drm_vblank_off() v2: Drop the drm_vblank_off() (Daniel) Use drm_crtc_vblank_{get,put}() Reviewed-by: Matt Roper Reviewed-by: Daniel Vetter Signed-off-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 99eb7cad62a8..8f6b932d8e79 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1341,6 +1341,12 @@ static void assert_sprites_disabled(struct drm_i915_private *dev_priv, } } +static void assert_vblank_disabled(struct drm_crtc *crtc) +{ + if (WARN_ON(drm_crtc_vblank_get(crtc) == 0)) + drm_crtc_vblank_put(crtc); +} + static void ibx_assert_pch_refclk_enabled(struct drm_i915_private *dev_priv) { u32 val; @@ -3905,6 +3911,8 @@ static void intel_crtc_enable_planes(struct drm_crtc *crtc) int pipe = intel_crtc->pipe; int plane = intel_crtc->plane; + assert_vblank_disabled(crtc); + drm_vblank_on(dev, pipe); intel_enable_primary_hw_plane(dev_priv, plane, pipe); @@ -3954,6 +3962,8 @@ static void intel_crtc_disable_planes(struct drm_crtc *crtc) intel_frontbuffer_flip(dev, INTEL_FRONTBUFFER_ALL_MASK(pipe)); drm_vblank_off(dev, pipe); + + assert_vblank_disabled(crtc); } static void ironlake_crtc_enable(struct drm_crtc *crtc)