public inbox for intel-gfx@lists.freedesktop.org
 help / color / mirror / Atom feed
* [PATCH] drm/i915: Fix bogus dig_port_map[] assignment for pre-HSW
@ 2016-02-24 14:35 Takashi Iwai
  2016-02-26 19:59 ` Takashi Iwai
                   ` (2 more replies)
  0 siblings, 3 replies; 10+ messages in thread
From: Takashi Iwai @ 2016-02-24 14:35 UTC (permalink / raw)
  To: Daniel Vetter; +Cc: Martin Kepplinger, intel-gfx

The recent commit [0bdf5a05647a: drm/i915: Add reverse mapping between
port and intel_encoder] introduced a reverse mapping to retrieve
intel_dig_port object from the port number.  The code assumed that the
port vs intel_dig_port are 1:1 mapping.  But in reality, this was a
too naive assumption.

As Martin reported about the missing HDMI audio on his SNB machine,
pre-HSW chips may have multiple intel_dig_port objects corresponding
to the same port.  Since we assign the mapping statically at the init
time and the multiple objects override the map, it may not match with
the actually enabled output.

This patch tries to address the regression above.  The reverse mapping
is provided basically only for the audio callbacks, so now we set /
clear the mapping dynamically at enabling and disabling HDMI/DP audio,
so that we can always track the latest and correct object
corresponding to the given port.

Fixes: 0bdf5a05647a ('drm/i915: Add reverse mapping between port and intel_encoder')
Reported-and-tested-by: Martin Kepplinger <martink@posteo.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 drivers/gpu/drm/i915/intel_audio.c | 3 +++
 drivers/gpu/drm/i915/intel_ddi.c   | 1 -
 drivers/gpu/drm/i915/intel_dp.c    | 1 -
 drivers/gpu/drm/i915/intel_hdmi.c  | 2 --
 4 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index 31f6d212fb1b..30f921421b0c 100644
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -527,6 +527,8 @@ void intel_audio_codec_enable(struct intel_encoder *intel_encoder)
 
 	mutex_lock(&dev_priv->av_mutex);
 	intel_dig_port->audio_connector = connector;
+	/* referred in audio callbacks */
+	dev_priv->dig_port_map[port] = intel_encoder;
 	mutex_unlock(&dev_priv->av_mutex);
 
 	if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
@@ -554,6 +556,7 @@ void intel_audio_codec_disable(struct intel_encoder *intel_encoder)
 
 	mutex_lock(&dev_priv->av_mutex);
 	intel_dig_port->audio_connector = NULL;
+	dev_priv->dig_port_map[port] = NULL;
 	mutex_unlock(&dev_priv->av_mutex);
 
 	if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 54a165b9c92d..a50fc452d5f1 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -3312,7 +3312,6 @@ void intel_ddi_init(struct drm_device *dev, enum port port)
 	intel_encoder->get_config = intel_ddi_get_config;
 
 	intel_dig_port->port = port;
-	dev_priv->dig_port_map[port] = intel_encoder;
 	intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
 					  (DDI_BUF_PORT_REVERSAL |
 					   DDI_A_4_LANES);
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 1bbd67b046da..acf918728492 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -6035,7 +6035,6 @@ intel_dp_init(struct drm_device *dev,
 	}
 
 	intel_dig_port->port = port;
-	dev_priv->dig_port_map[port] = intel_encoder;
 	intel_dig_port->dp.output_reg = output_reg;
 
 	intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 4a77639a489d..23ee48dc765f 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -2146,7 +2146,6 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
 void intel_hdmi_init(struct drm_device *dev,
 		     i915_reg_t hdmi_reg, enum port port)
 {
-	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_digital_port *intel_dig_port;
 	struct intel_encoder *intel_encoder;
 	struct intel_connector *intel_connector;
@@ -2215,7 +2214,6 @@ void intel_hdmi_init(struct drm_device *dev,
 		intel_encoder->cloneable |= 1 << INTEL_OUTPUT_HDMI;
 
 	intel_dig_port->port = port;
-	dev_priv->dig_port_map[port] = intel_encoder;
 	intel_dig_port->hdmi.hdmi_reg = hdmi_reg;
 	intel_dig_port->dp.output_reg = INVALID_MMIO_REG;
 
-- 
2.7.2

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply related	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2016-03-07 18:06 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2016-02-24 14:35 [PATCH] drm/i915: Fix bogus dig_port_map[] assignment for pre-HSW Takashi Iwai
2016-02-26 19:59 ` Takashi Iwai
2016-02-29 14:34   ` Martin Kepplinger
2016-02-29 14:39     ` Jani Nikula
2016-03-03 15:05       ` Takashi Iwai
2016-03-07 12:18         ` Martin Kepplinger
2016-03-07 18:06           ` [Intel-gfx] " Jani Nikula
2016-02-27  0:08 ` Ville Syrjälä
2016-02-29 14:26 ` ✗ Fi.CI.BAT: failure for " Patchwork
2016-03-03 16:06   ` Ville Syrjälä

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox