drm/i915: check connector->encoder before using it.
DP MST will need connectors that aren't connected to specific
encoders, add some checks in advance to avoid oopses.
Reviewed-by: Todd Previte <tprevite@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 4a5b0f8..f27daf7 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2209,13 +2209,15 @@
seq_printf(m, "\tCEA rev: %d\n",
connector->display_info.cea_rev);
}
- if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT ||
- intel_encoder->type == INTEL_OUTPUT_EDP)
- intel_dp_info(m, intel_connector);
- else if (intel_encoder->type == INTEL_OUTPUT_HDMI)
- intel_hdmi_info(m, intel_connector);
- else if (intel_encoder->type == INTEL_OUTPUT_LVDS)
- intel_lvds_info(m, intel_connector);
+ if (intel_encoder) {
+ if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT ||
+ intel_encoder->type == INTEL_OUTPUT_EDP)
+ intel_dp_info(m, intel_connector);
+ else if (intel_encoder->type == INTEL_OUTPUT_HDMI)
+ intel_hdmi_info(m, intel_connector);
+ else if (intel_encoder->type == INTEL_OUTPUT_LVDS)
+ intel_lvds_info(m, intel_connector);
+ }
seq_printf(m, "\tmodes:\n");
list_for_each_entry(mode, &connector->modes, head)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 026f0a3..12d77b5 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1165,6 +1165,8 @@
dev_priv->hpd_event_bits = 0;
list_for_each_entry(connector, &mode_config->connector_list, head) {
intel_connector = to_intel_connector(connector);
+ if (!intel_connector->encoder)
+ continue;
intel_encoder = intel_connector->encoder;
if (intel_encoder->hpd_pin > HPD_NONE &&
dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_MARK_DISABLED &&
@@ -1195,6 +1197,8 @@
list_for_each_entry(connector, &mode_config->connector_list, head) {
intel_connector = to_intel_connector(connector);
+ if (!intel_connector->encoder)
+ continue;
intel_encoder = intel_connector->encoder;
if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
if (intel_encoder->hot_plug)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e07e6b5..008bb3d 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5003,20 +5003,23 @@
"wrong connector dpms state\n");
WARN(connector->base.encoder != &encoder->base,
"active connector not linked to encoder\n");
- WARN(!encoder->connectors_active,
- "encoder->connectors_active not set\n");
- encoder_enabled = encoder->get_hw_state(encoder, &pipe);
- WARN(!encoder_enabled, "encoder not enabled\n");
- if (WARN_ON(!encoder->base.crtc))
- return;
+ if (encoder) {
+ WARN(!encoder->connectors_active,
+ "encoder->connectors_active not set\n");
- crtc = encoder->base.crtc;
+ encoder_enabled = encoder->get_hw_state(encoder, &pipe);
+ WARN(!encoder_enabled, "encoder not enabled\n");
+ if (WARN_ON(!encoder->base.crtc))
+ return;
- WARN(!crtc->enabled, "crtc not enabled\n");
- WARN(!to_intel_crtc(crtc)->active, "crtc not active\n");
- WARN(pipe != to_intel_crtc(crtc)->pipe,
- "encoder active on the wrong pipe\n");
+ crtc = encoder->base.crtc;
+
+ WARN(!crtc->enabled, "crtc not enabled\n");
+ WARN(!to_intel_crtc(crtc)->active, "crtc not active\n");
+ WARN(pipe != to_intel_crtc(crtc)->pipe,
+ "encoder active on the wrong pipe\n");
+ }
}
}