[alsa-devel] [PATCH v2 4/9] drm/i915: Add reverse mapping between port and intel_encoder

[Takashi Iwai]

This patch adds a reverse mapping from a digital port number to
intel_encoder object containing the corresponding intel_digital_port.
It simplifies the query of the encoder a lot.

Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 drivers/gpu/drm/i915/i915_drv.h    |  2 ++
 drivers/gpu/drm/i915/intel_audio.c | 22 ++--------------------
 drivers/gpu/drm/i915/intel_ddi.c   |  1 +
 drivers/gpu/drm/i915/intel_dp.c    |  1 +
 drivers/gpu/drm/i915/intel_hdmi.c  |  2 ++
 5 files changed, 8 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 95bb27de774f..3483d8125eac 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1955,6 +1955,8 @@ struct drm_i915_private {
 	/* perform PHY state sanity checks? */
 	bool chv_phy_assert[2];
 
+	struct intel_encoder *dig_port_map[I915_MAX_PORTS];
+
 	/*
 	 * NOTE: This is the dri1/ums dungeon, don't add stuff here. Your patch
 	 * will be rejected. Instead look for a better place.
diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index 19958bdb9bd0..67ee99f00ddd 100644
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -630,28 +630,10 @@ static int i915_audio_component_get_cdclk_freq(struct device *dev)
 	return ret;
 }
 
-static struct intel_encoder *audio_port_to_encoder(struct drm_device *drm_dev,
-						   int port)
-{
-	struct intel_encoder *intel_encoder;
-	struct intel_digital_port *intel_dig_port;
-
-	for_each_intel_encoder(drm_dev, intel_encoder) {
-		if (intel_encoder->type != INTEL_OUTPUT_HDMI &&
-		    intel_encoder->type != INTEL_OUTPUT_DISPLAYPORT)
-			continue;
-		intel_dig_port = enc_to_dig_port(&intel_encoder->base);
-		if (port == intel_dig_port->port)
-			return intel_encoder;
-	}
-	return NULL;
-}
-
 static int i915_audio_component_sync_audio_rate(struct device *dev,
 						int port, int rate)
 {
 	struct drm_i915_private *dev_priv = dev_to_i915(dev);
-	struct drm_device *drm_dev = dev_priv->dev;
 	struct intel_encoder *intel_encoder;
 	struct intel_crtc *crtc;
 	struct drm_display_mode *mode;
@@ -668,7 +650,7 @@ static int i915_audio_component_sync_audio_rate(struct device *dev,
 
 	mutex_lock(&dev_priv->av_mutex);
 	/* 1. get the pipe */
-	intel_encoder = audio_port_to_encoder(drm_dev, port);
+	intel_encoder = dev_priv->dig_port_map[port];
 	if (!intel_encoder || intel_encoder->type != INTEL_OUTPUT_HDMI) {
 		DRM_DEBUG_KMS("no pipe for the port %c\n", port_name(port));
 		mutex_unlock(&dev_priv->av_mutex);
@@ -725,7 +707,7 @@ static int i915_audio_component_get_eld(struct device *dev, int port,
 	int ret = -EINVAL;
 
 	drm_modeset_lock_all(drm_dev);
-	intel_encoder = audio_port_to_encoder(drm_dev, port);
+	intel_encoder = dev_priv->dig_port_map[port];
 	if (intel_encoder) {
 		ret = 0;
 		intel_dig_port = enc_to_dig_port(&intel_encoder->base);
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index a6752a61d99f..6770110a4075 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -3285,6 +3285,7 @@ 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 09bdd94ca3ba..1c02c6466f30 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -6201,6 +6201,7 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
 	}
 
 	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 9eafa191cee2..1d9f522a6679 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -2133,6 +2133,7 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
 
 void intel_hdmi_init(struct drm_device *dev, int 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;
@@ -2201,6 +2202,7 @@ void intel_hdmi_init(struct drm_device *dev, int hdmi_reg, enum port port)
 		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 = 0;
 
-- 
2.6.3