From 8af6cf88a5ad7fa41d4eb700cc97f01d0bcd2a69 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Tue, 10 Jul 2012 09:50:11 +0200 Subject: [PATCH] drm/i915: add tons of modeset state checks ... let's see whether this catches anything earlier and I can track down a few bugs. v2: Add more checks and also add DRM_DEBUG_KMS output so that it's clear which connector/encoder/crtc is being checked atm. Which proved rather useful for debugging ... v3: Add a WARN in the common encoder dpms function, now that also modeset changes properly update the dpms state ... v4: Properly add a short explanation for each WARN, to avoid the need to correlate dmesg lines with source lines accurately. Suggested by Chris Wilson. v5: Also dump (expected, found) for state checks (or wherever it's not apparent from the test what exactly mismatches with expectations). Again suggested by Chris Wilson. v6: Due to an issue reported by Paulo Zanoni I've noticed that the encoder checking is by far not as strict as it could and should be. Improve this. Reviewed-by: Jesse Barnes Signed-Off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 104 ++++++++++++++++++++++++++- 1 file changed, 103 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 4c0ec180564f..d15fa0c6ae88 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3637,7 +3637,7 @@ void intel_connector_dpms(struct drm_connector *connector, int mode) if (encoder->base.crtc) intel_encoder_dpms(encoder, mode); else - encoder->connectors_active = false; + WARN_ON(encoder->connectors_active != false); intel_connector_check_state(to_intel_connector(connector)); } @@ -6872,6 +6872,104 @@ intel_modeset_update_state(struct drm_device *dev, unsigned prepare_pipes) base.head) \ if (mask & (1 <<(intel_crtc)->pipe)) \ +static void +intel_modeset_check_state(struct drm_device *dev) +{ + struct intel_crtc *crtc; + struct intel_encoder *encoder; + struct intel_connector *connector; + + list_for_each_entry(connector, &dev->mode_config.connector_list, + base.head) { + /* This also checks the encoder/connector hw state with the + * ->get_hw_state callbacks. */ + intel_connector_check_state(connector); + + WARN(&connector->new_encoder->base != connector->base.encoder, + "connector's staged encoder doesn't match current encoder\n"); + } + + list_for_each_entry(encoder, &dev->mode_config.encoder_list, + base.head) { + bool enabled = false; + bool active = false; + enum pipe pipe, tracked_pipe; + + DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", + encoder->base.base.id, + drm_get_encoder_name(&encoder->base)); + + WARN(&encoder->new_crtc->base != encoder->base.crtc, + "encoder's stage crtc doesn't match current crtc\n"); + WARN(encoder->connectors_active && !encoder->base.crtc, + "encoder's active_connectors set, but no crtc\n"); + + list_for_each_entry(connector, &dev->mode_config.connector_list, + base.head) { + if (connector->base.encoder != &encoder->base) + continue; + enabled = true; + if (connector->base.dpms != DRM_MODE_DPMS_OFF) + active = true; + } + WARN(!!encoder->base.crtc != enabled, + "encoder's enabled state mismatch " + "(expected %i, found %i)\n", + !!encoder->base.crtc, enabled); + WARN(active && !encoder->base.crtc, + "active encoder with no crtc\n"); + + WARN(encoder->connectors_active != active, + "encoder's computed active state doesn't match tracked active state " + "(expected %i, found %i)\n", active, encoder->connectors_active); + + active = encoder->get_hw_state(encoder, &pipe); + WARN(active != encoder->connectors_active, + "encoder's hw state doesn't match sw tracking " + "(expected %i, found %i)\n", + encoder->connectors_active, active); + + if (!encoder->base.crtc) + continue; + + tracked_pipe = to_intel_crtc(encoder->base.crtc)->pipe; + WARN(active && pipe != tracked_pipe, + "active encoder's pipe doesn't match" + "(expected %i, found %i)\n", + tracked_pipe, pipe); + + } + + list_for_each_entry(crtc, &dev->mode_config.crtc_list, + base.head) { + bool enabled = false; + bool active = false; + + DRM_DEBUG_KMS("[CRTC:%d]\n", + crtc->base.base.id); + + WARN(crtc->active && !crtc->base.enabled, + "active crtc, but not enabled in sw tracking\n"); + + list_for_each_entry(encoder, &dev->mode_config.encoder_list, + base.head) { + if (encoder->base.crtc != &crtc->base) + continue; + enabled = true; + if (encoder->connectors_active) + active = true; + } + WARN(active != crtc->active, + "crtc's computed active state doesn't match tracked active state " + "(expected %i, found %i)\n", active, crtc->active); + WARN(enabled != crtc->base.enabled, + "crtc's computed enabled state doesn't match tracked enabled state " + "(expected %i, found %i)\n", enabled, crtc->base.enabled); + + assert_pipe(dev->dev_private, crtc->pipe, crtc->active); + } +} + bool intel_set_mode(struct drm_crtc *crtc, struct drm_display_mode *mode, int x, int y, struct drm_framebuffer *fb) @@ -6969,6 +7067,8 @@ done: if (!ret && crtc->enabled) { crtc->hwmode = saved_hwmode; crtc->mode = saved_mode; + } else { + intel_modeset_check_state(dev); } return ret; @@ -8147,6 +8247,8 @@ void intel_modeset_setup_hw_state(struct drm_device *dev) } intel_modeset_update_staged_output_state(dev); + + intel_modeset_check_state(dev); } void intel_modeset_gem_init(struct drm_device *dev) -- 2.20.1