With the recent modeset internal rework, we wind up setting crtc_state->enable
to false, but leave crtc_state->active as true following a
drmModeSetCrtc(fb=0), which is incorrect. This mismatch gets caught by
drm_atomic_crtc_check() and causes subsequent atomic operations (such as plane
updates while the CRTC is disabled) to fail.
Bisect points to
commit dad9a7d6d96630182fb52aae7c3856e9e7285e13
Author: Ander Conselvan de Oliveira
<ander.conselvan.de.olive...@intel.com>
Date: Tue Apr 21 17:13:19 2015 +0300
drm/i915: Use atomic helpers for computing changed flags
as the commit that actually triggers the regression.
Cc: Matt Roper <matthew.d.ro...@intel.com>
Cc: Ander Conselvan de Oliveira <ander.conselvan.de.olive...@intel.com>
Reported-and-Tested-by: Kenneth Graunke <kenn...@whitecape.org>
Signed-off-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
---
The original patch for this is wrong, we should keep enable and active in sync
when changed.
Please revert "drm/i915: Set crtc_state->active to false when CRTC is disabled
(v2)".
drivers/gpu/drm/i915/intel_display.c | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 22e6644f755e..e223209e2d81 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9868,7 +9868,7 @@ retry:
goto fail;
}
- crtc_state->base.enable = true;
+ crtc_state->base.active = crtc_state->base.enable = true;
if (!mode)
mode = &load_detect_mode;
@@ -9965,7 +9965,7 @@ void intel_release_load_detect_pipe(struct drm_connector
*connector,
connector_state->best_encoder = NULL;
connector_state->crtc = NULL;
- crtc_state->base.enable = false;
+ crtc_state->base.enable = crtc_state->base.active = false;
ret = intel_modeset_setup_plane_state(state, crtc, NULL, NULL,
0, 0);
@@ -12492,7 +12492,8 @@ void intel_crtc_restore_mode(struct drm_crtc *crtc)
continue;
}
- crtc_state->base.enable = intel_crtc->new_enabled;
+ crtc_state->base.active = crtc_state->base.enable =
+ intel_crtc->new_enabled;
if (&intel_crtc->base == crtc)
drm_mode_copy(&crtc_state->base.mode, &crtc->mode);
@@ -12617,11 +12618,16 @@ intel_modeset_stage_output_state(struct drm_device
*dev,
}
for_each_crtc_in_state(state, crtc, crtc_state, i) {
+ bool has_connectors;
+
ret = drm_atomic_add_affected_connectors(state, crtc);
if (ret)
return ret;
- crtc_state->enable = drm_atomic_connectors_for_crtc(state,
crtc);
+ has_connectors = !!drm_atomic_connectors_for_crtc(state, crtc);
+ if (has_connectors != crtc_state->enable)
+ crtc_state->enable =
+ crtc_state->active = has_connectors;
}
ret = intel_modeset_setup_plane_state(state, set->crtc, set->mode,
@@ -14598,6 +14604,7 @@ static void intel_sanitize_crtc(struct intel_crtc *crtc)
WARN_ON(crtc->active);
crtc->base.state->enable = false;
+ crtc->base.state->active = false;
crtc->base.enabled = false;
}
@@ -14626,6 +14633,7 @@ static void intel_sanitize_crtc(struct intel_crtc *crtc)
crtc->active ? "enabled" : "disabled");
crtc->base.state->enable = crtc->active;
+ crtc->base.state->active = crtc->active;
crtc->base.enabled = crtc->active;
/* Because we only establish the connector -> encoder ->
@@ -14764,6 +14772,7 @@ static void intel_modeset_readout_hw_state(struct
drm_device *dev)
crtc->config);
crtc->base.state->enable = crtc->active;
+ crtc->base.state->active = crtc->active;
crtc->base.enabled = crtc->active;
plane_state = to_intel_plane_state(primary->state);
--
2.1.0
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