From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Atomic changes broke check_digital_port_conflicts(). It needs to look
at the global situation instead of just trying to find a conflict
within the current atomic state.
This bug made my HSW explode spectacularly after I had split the DDI
encoders into separate DP and HDMI encoders. With the fix, things
seem much more solid.
I hope holding the connection_mutex is enough protection that we can
actually walk the connectors even if they're not part of the current
atomic state...
v2: Regenerate the patch so that it actually applies (Jani)
Cc: stable@xxxxxxxxxxxxxxx
Cc: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@xxxxxxxxx>
Fixes: 5448a00d3f06 ("drm/i915: Don't use staged config in check_digital_port_conflicts()")
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 930661de11ff..10974424bdfa 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12260,18 +12260,22 @@ static void intel_dump_pipe_config(struct intel_crtc *crtc,
static bool check_digital_port_conflicts(struct drm_atomic_state *state)
{
struct drm_device *dev = state->dev;
- struct intel_encoder *encoder;
struct drm_connector *connector;
- struct drm_connector_state *connector_state;
unsigned int used_ports = 0;
- int i;
/*
* Walk the connector list instead of the encoder
* list to detect the problem on ddi platforms
* where there's just one encoder per digital port.
*/
- for_each_connector_in_state(state, connector, connector_state, i) {
+ drm_for_each_connector(connector, dev) {
+ struct drm_connector_state *connector_state;
+ struct intel_encoder *encoder;
+
+ connector_state = drm_atomic_get_existing_connector_state(state, connector);
+ if (!connector_state)
+ connector_state = connector->state;
+
if (!connector_state->best_encoder)
continue;
--
2.4.10
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