From 86b04268d4b25c3a00fa5f77ceebabecf681040a Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Wed, 1 Mar 2017 10:52:26 +0100 Subject: [PATCH] drm/i915: Fix up verify_encoder_state The trouble here is that looking at all connector->state in the verifier isn't good, because that's run from the commit work, which doesn't hold the connection_mutex. Which means we're only allowed to look at states in our atomic update. The simple fix for future proofing would be to switch over to drm_for_each_connector_in_state, but that has the problem that the verification then fails if not all connectors are in the state. And we also need to be careful to check both old and new encoders, and not screw things up when an encoder gets reassigned. Note that this isn't the full fix, since we still look at connector->state. To fix that, we need Maarten's patch series to switch over to state pointers within drm_atomic_state, but that's a different series. v2: Use oldnew iterator (Maarten). v3: Rebase onto the iter_get/put->iter_begin/end rename. Cc: Thierry Reding Cc: Maarten Lankhorst Reviewed-by: Maarten Lankhorst Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20170301095226.30584-6-daniel.vetter@ffwll.ch --- drivers/gpu/drm/i915/intel_display.c | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index f0731f45a4b2..5526a196e8a2 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -11907,31 +11907,37 @@ verify_connector_state(struct drm_device *dev, } static void -verify_encoder_state(struct drm_device *dev) +verify_encoder_state(struct drm_device *dev, struct drm_atomic_state *state) { struct intel_encoder *encoder; - struct intel_connector *connector; - struct drm_connector_list_iter conn_iter; + struct drm_connector *connector; + struct drm_connector_state *old_conn_state, *new_conn_state; + int i; for_each_intel_encoder(dev, encoder) { - bool enabled = false; + bool enabled = false, found = false; enum pipe pipe; DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.base.id, encoder->base.name); - drm_connector_list_iter_begin(dev, &conn_iter); - for_each_intel_connector_iter(connector, &conn_iter) { - if (connector->base.state->best_encoder != &encoder->base) + for_each_oldnew_connector_in_state(state, connector, old_conn_state, + new_conn_state, i) { + if (old_conn_state->best_encoder == &encoder->base) + found = true; + + if (new_conn_state->best_encoder != &encoder->base) continue; - enabled = true; + found = enabled = true; - I915_STATE_WARN(connector->base.state->crtc != + I915_STATE_WARN(new_conn_state->crtc != encoder->base.crtc, "connector's crtc doesn't match encoder crtc\n"); } - drm_connector_list_iter_end(&conn_iter); + + if (!found) + continue; I915_STATE_WARN(!!encoder->base.crtc != enabled, "encoder's enabled state mismatch " @@ -12133,7 +12139,7 @@ static void intel_modeset_verify_disabled(struct drm_device *dev, struct drm_atomic_state *state) { - verify_encoder_state(dev); + verify_encoder_state(dev, state); verify_connector_state(dev, state, NULL); verify_disabled_dpll_state(dev); } -- 2.20.1