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From: Dave Airlie <airlied@gmail.com>
To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org
Subject: [PATCH 08/10] drm/i915: check connector->encoder before using it.
Date: Mon, 12 May 2014 16:46:45 +1000	[thread overview]
Message-ID: <1399877207-15868-9-git-send-email-airlied@gmail.com> (raw)
In-Reply-To: <1399877207-15868-1-git-send-email-airlied@gmail.com>

From: Dave Airlie <airlied@redhat.com>

DP MST will need connectors that aren't connected to specific
encoders, add some checks in advance to avoid oopses.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c  | 16 +++++++++-------
 drivers/gpu/drm/i915/i915_irq.c      |  4 ++++
 drivers/gpu/drm/i915/intel_display.c | 25 ++++++++++++++-----------
 3 files changed, 27 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 1e83ae4..88e944f 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2279,13 +2279,15 @@ static void intel_connector_info(struct seq_file *m,
 		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 afa5519..5852dee 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1016,6 +1016,8 @@ static void i915_hotplug_work_func(struct work_struct *work)
 	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 &&
@@ -1046,6 +1048,8 @@ static void i915_hotplug_work_func(struct work_struct *work)
 
 	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 b39d036..75b2aaf 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4600,20 +4600,23 @@ static void intel_connector_check_state(struct intel_connector *connector)
 		     "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");
+
+			encoder_enabled = encoder->get_hw_state(encoder, &pipe);
+			WARN(!encoder_enabled, "encoder not enabled\n");
+			if (WARN_ON(!encoder->base.crtc))
+				return;
 
-		crtc = encoder->base.crtc;
+			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");
+			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");
+		}
 	}
 }
 
-- 
1.9.0

  parent reply	other threads:[~2014-05-12  6:46 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-12  6:46 [RFC] DisplayPort MST v0.3 Dave Airlie
2014-05-12  6:46 ` [PATCH 01/10] drm/dp_helper: add defines for DP 1.2 and MST support Dave Airlie
2014-05-13  8:51   ` Jingoo Han
2014-05-12  6:46 ` [PATCH 02/10] drm: add DP MST encoder type Dave Airlie
2014-05-12  6:46 ` [PATCH 03/10] drm/i915: add some registers need for displayport MST support Dave Airlie
2014-05-12  6:46 ` [PATCH 04/10] drm/crtc: add interface to reinitialise the legacy mode group Dave Airlie
2014-05-13  8:26   ` Thierry Reding
2014-05-13 10:15     ` Daniel Vetter
2014-05-12  6:46 ` [PATCH 05/10] drm: add a path blob property Dave Airlie
2014-05-13  8:25   ` Thierry Reding
2014-05-12  6:46 ` [PATCH 06/10] drm/helper: add Displayport multi-stream helper (v0.3) Dave Airlie
2014-05-12  6:46 ` [PATCH 07/10] i915: split some DP modesetting code into a separate function Dave Airlie
2014-05-12  6:46 ` Dave Airlie [this message]
2014-05-12  6:46 ` [PATCH 09/10] i915: add DP 1.2 MST support (v0.3) Dave Airlie
2014-05-13  7:18   ` David Herrmann
2014-05-14  0:03     ` Dave Airlie
2014-05-14  6:05       ` David Herrmann
2014-05-14  8:23         ` Daniel Vetter
2014-05-12  6:46 ` [PATCH 10/10] i915: mst topology dumper in debugfs Dave Airlie
2014-05-13  8:33   ` Thierry Reding
2014-05-13 10:18     ` Daniel Vetter
2014-05-13 10:40       ` Thierry Reding
2014-05-12  8:25 ` [RFC] DisplayPort MST v0.3 Dave Airlie

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