From 8f539a83efa7dceb7c2257ca96e2dfc846bd12f6 Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Mon, 13 Jul 2015 16:30:32 +0200 Subject: [PATCH] drm/i915: always disable irqs in intel_pipe_update_start This can only fail because of a bug in the code. Suggested-by: Daniel Vetter Signed-off-by: Maarten Lankhorst [danvet: Squash in follow-up to also remove start_vbl_count from intel_crtc->atomic and put it into the intel_crtc directly - it's not precomputed state.] Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 15 +++++---------- drivers/gpu/drm/i915/intel_drv.h | 7 ++----- drivers/gpu/drm/i915/intel_sprite.c | 17 +++++++---------- 3 files changed, 14 insertions(+), 25 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 755389f18dfe..bd92e9ce4127 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -11247,12 +11247,11 @@ static void ilk_do_mmio_flip(struct intel_crtc *intel_crtc) static void intel_do_mmio_flip(struct intel_crtc *intel_crtc) { struct drm_device *dev = intel_crtc->base.dev; - bool atomic_update; u32 start_vbl_count; intel_mark_page_flip_active(intel_crtc); - atomic_update = intel_pipe_update_start(intel_crtc, &start_vbl_count); + intel_pipe_update_start(intel_crtc, &start_vbl_count); if (INTEL_INFO(dev)->gen >= 9) skl_do_mmio_flip(intel_crtc); @@ -11260,8 +11259,7 @@ static void intel_do_mmio_flip(struct intel_crtc *intel_crtc) /* use_mmio_flip() retricts MMIO flips to ilk+ */ ilk_do_mmio_flip(intel_crtc); - if (atomic_update) - intel_pipe_update_end(intel_crtc, start_vbl_count); + intel_pipe_update_end(intel_crtc, start_vbl_count); } static void intel_mmio_flip_work_func(struct work_struct *work) @@ -13646,9 +13644,7 @@ static void intel_begin_crtc_commit(struct drm_crtc *crtc) /* Perform vblank evasion around commit operation */ if (crtc->state->active) - intel_crtc->atomic.evade = - intel_pipe_update_start(intel_crtc, - &intel_crtc->atomic.start_vbl_count); + intel_pipe_update_start(intel_crtc, &intel_crtc->start_vbl_count); if (!needs_modeset(crtc->state) && INTEL_INFO(dev)->gen >= 9) skl_detach_scalers(intel_crtc); @@ -13658,9 +13654,8 @@ static void intel_finish_crtc_commit(struct drm_crtc *crtc) { struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - if (intel_crtc->atomic.evade) - intel_pipe_update_end(intel_crtc, - intel_crtc->atomic.start_vbl_count); + if (crtc->state->active) + intel_pipe_update_end(intel_crtc, intel_crtc->start_vbl_count); } /** diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index cc91ea370c99..0fcfa7f179c4 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -488,10 +488,6 @@ struct skl_pipe_wm { * and thus can't be run with interrupts disabled. */ struct intel_crtc_atomic_commit { - /* vblank evasion */ - bool evade; - unsigned start_vbl_count; - /* Sleepable operations to perform before commit */ bool wait_for_flips; bool disable_fbc; @@ -559,6 +555,7 @@ struct intel_crtc { int scanline_offset; + unsigned start_vbl_count; struct intel_crtc_atomic_commit atomic; /* scalers available on this crtc */ @@ -1385,7 +1382,7 @@ bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg, bool is_sdvob); int intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane); int intel_sprite_set_colorkey(struct drm_device *dev, void *data, struct drm_file *file_priv); -bool intel_pipe_update_start(struct intel_crtc *crtc, +void intel_pipe_update_start(struct intel_crtc *crtc, uint32_t *start_vbl_count); void intel_pipe_update_end(struct intel_crtc *crtc, u32 start_vbl_count); diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c index cd21525df352..9d8af2f8a875 100644 --- a/drivers/gpu/drm/i915/intel_sprite.c +++ b/drivers/gpu/drm/i915/intel_sprite.c @@ -75,10 +75,8 @@ static int usecs_to_scanlines(const struct drm_display_mode *mode, int usecs) * until a subsequent call to intel_pipe_update_end(). That is done to * avoid random delays. The value written to @start_vbl_count should be * supplied to intel_pipe_update_end() for error checking. - * - * Return: true if the call was successful */ -bool intel_pipe_update_start(struct intel_crtc *crtc, uint32_t *start_vbl_count) +void intel_pipe_update_start(struct intel_crtc *crtc, uint32_t *start_vbl_count) { struct drm_device *dev = crtc->base.dev; const struct drm_display_mode *mode = &crtc->config->base.adjusted_mode; @@ -96,13 +94,14 @@ bool intel_pipe_update_start(struct intel_crtc *crtc, uint32_t *start_vbl_count) min = vblank_start - usecs_to_scanlines(mode, 100); max = vblank_start - 1; + local_irq_disable(); + *start_vbl_count = 0; + if (min <= 0 || max <= 0) - return false; + return; if (WARN_ON(drm_crtc_vblank_get(&crtc->base))) - return false; - - local_irq_disable(); + return; trace_i915_pipe_update_start(crtc, min, max); @@ -138,8 +137,6 @@ bool intel_pipe_update_start(struct intel_crtc *crtc, uint32_t *start_vbl_count) *start_vbl_count = dev->driver->get_vblank_counter(dev, pipe); trace_i915_pipe_update_vblank_evaded(crtc, min, max, *start_vbl_count); - - return true; } /** @@ -161,7 +158,7 @@ void intel_pipe_update_end(struct intel_crtc *crtc, u32 start_vbl_count) local_irq_enable(); - if (start_vbl_count != end_vbl_count) + if (start_vbl_count && start_vbl_count != end_vbl_count) DRM_ERROR("Atomic update failure on pipe %c (start=%u end=%u)\n", pipe_name(pipe), start_vbl_count, end_vbl_count); } -- 2.20.1