drm/i915: Fix bogus dig_port_map[] assignment for pre-HSW

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>
Cc: drm-intel-fixes@lists.freedesktop.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: Martin Kepplinger <martink@posteo.de>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1456324522-21591-1-git-send-email-tiwai@suse.de
(cherry picked from commit 9dfbffcf4ac0707097af9e6c1372192b9d03a357)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index 31f6d212fb1bbbfa1ce64efe8cebde2a5f9f575d..30f921421b0c944217832ba86856a6904f8fef11 100644 (file)
--- 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 0f3df2c39f7cdd3a69d8f0044cbd725e3b9bac6d..084d5586585d012891423067703fde0f9daec0b1 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -3358,7 +3358,6 @@ 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 1d8de43bed56839fd1fee3a75b6d61b6221c7c0a..cdc2c15873dcc71189ed3263aad55e3c63493ed3 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -6045,7 +6045,6 @@ 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 cb5d1b15755c3b19a496105c7a8df99982e83cb9..616108c4bc3e5741f59c9a1066aa2df3b63d5fc5 100644 (file)
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -2154,7 +2154,6 @@ 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;
@@ -2223,7 +2222,6 @@ 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;