drm/i915: Replace tmds_clock_speed and link_rate with just ls_clock

There's no need to distinguish between the DP link rate and HDMI TMDS
clock for the purposes of the LPE audio. Both are actually the same
thing more or less, which is the link symbol clock. So let's just
call the thing ls_clock and simplify the code.

Cc: Takashi Iwai <tiwai@suse.de>
Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170427160231.13337-6-ville.syrjala@linux.intel.com
Reviewed-by: Takashi Iwai <tiwai@suse.de>

drivers/gpu/drm/i915/i915_drv.h

@@ -3721,8 +3721,8 @@ int  intel_lpe_audio_init(struct drm_i915_private *dev_priv);
 void intel_lpe_audio_teardown(struct drm_i915_private *dev_priv);
 void intel_lpe_audio_irq_handler(struct drm_i915_private *dev_priv);
 void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
-			    void *eld, int port, int pipe, int tmds_clk_speed,
-			    bool dp_output, int link_rate);
+			    void *eld, int port, int pipe, int ls_clock,
+			    bool dp_output);
 
 /* intel_i2c.c */
 extern int intel_setup_gmbus(struct drm_i915_private *dev_priv);

drivers/gpu/drm/i915/intel_audio.c

@@ -632,20 +632,9 @@ void intel_audio_codec_enable(struct intel_encoder *intel_encoder,
 						 (int) port, (int) pipe);
 	}
 
-	switch (intel_encoder->type) {
-	case INTEL_OUTPUT_HDMI:
-		intel_lpe_audio_notify(dev_priv, connector->eld, port, pipe,
-				       crtc_state->port_clock,
-				       false, 0);
-		break;
-	case INTEL_OUTPUT_DP:
-		intel_lpe_audio_notify(dev_priv, connector->eld, port, pipe,
-				       adjusted_mode->crtc_clock,
-				       true, crtc_state->port_clock);
-		break;
-	default:
-		break;
-	}
+	intel_lpe_audio_notify(dev_priv, connector->eld, port, pipe,
+			       crtc_state->port_clock,
+			       intel_encoder->type == INTEL_OUTPUT_DP);
 }
 
 /**
@@ -680,7 +669,7 @@ void intel_audio_codec_disable(struct intel_encoder *intel_encoder)
 						 (int) port, (int) pipe);
 	}
 
-	intel_lpe_audio_notify(dev_priv, NULL, port, pipe, 0, false, 0);
+	intel_lpe_audio_notify(dev_priv, NULL, port, pipe, 0, false);
 }
 
 /**

drivers/gpu/drm/i915/intel_lpe_audio.c

@@ -309,13 +309,14 @@ void intel_lpe_audio_teardown(struct drm_i915_private *dev_priv)
  * @eld : ELD data
  * @pipe: pipe id
  * @port: port id
- * @tmds_clk_speed: tmds clock frequency in Hz
+ * @ls_clock: Link symbol clock in kHz
+ * @dp_output: Driving a DP output?
  *
  * Notify lpe audio driver of eld change.
  */
 void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
-			    void *eld, int port, int pipe, int tmds_clk_speed,
-			    bool dp_output, int link_rate)
+			    void *eld, int port, int pipe, int ls_clock,
+			    bool dp_output)
 {
 	unsigned long irq_flags;
 	struct intel_hdmi_lpe_audio_pdata *pdata = NULL;
@@ -337,12 +338,8 @@ void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
 		pdata->eld.port_id = port;
 		pdata->eld.pipe_id = pipe;
 		pdata->hdmi_connected = true;
-
+		pdata->ls_clock = ls_clock;
 		pdata->dp_output = dp_output;
-		if (tmds_clk_speed)
-			pdata->tmds_clock_speed = tmds_clk_speed;
-		if (link_rate)
-			pdata->link_rate = link_rate;
 
 		/* Unmute the amp for both DP and HDMI */
 		I915_WRITE(VLV_AUD_PORT_EN_DBG(port),
@@ -352,6 +349,7 @@ void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
 		memset(pdata->eld.eld_data, 0,
 			HDMI_MAX_ELD_BYTES);
 		pdata->hdmi_connected = false;
+		pdata->ls_clock = 0;
 		pdata->dp_output = false;
 
 		/* Mute the amp for both DP and HDMI */

include/drm/intel_lpe_audio.h

@@ -38,10 +38,9 @@ struct intel_hdmi_lpe_audio_eld {
 };
 
 struct intel_hdmi_lpe_audio_pdata {
-	int tmds_clock_speed;
+	int ls_clock;
 	bool hdmi_connected;
 	bool dp_output;
-	int link_rate;
 	struct intel_hdmi_lpe_audio_eld eld;
 	void (*notify_audio_lpe)(struct platform_device *pdev);
 	spinlock_t lpe_audio_slock;

sound/x86/intel_hdmi_audio.c

@@ -1568,7 +1568,7 @@ static void had_audio_wq(struct work_struct *work)
 		struct intel_hdmi_lpe_audio_eld *eld = &pdata->eld;
 
 		dev_dbg(ctx->dev, "%s: HAD_NOTIFY_ELD : port = %d, tmds = %d\n",
-			__func__, eld->port_id,	pdata->tmds_clock_speed);
+			__func__, eld->port_id,	pdata->ls_clock);
 
 		switch (eld->pipe_id) {
 		case 0:
@@ -1589,8 +1589,13 @@ static void had_audio_wq(struct work_struct *work)
 		memcpy(ctx->eld, eld->eld_data, sizeof(ctx->eld));
 
 		ctx->dp_output = pdata->dp_output;
-		ctx->tmds_clock_speed = pdata->tmds_clock_speed;
-		ctx->link_rate = pdata->link_rate;
+		if (ctx->dp_output) {
+			ctx->tmds_clock_speed = 0;
+			ctx->link_rate = pdata->ls_clock;
+		} else {
+			ctx->tmds_clock_speed = pdata->ls_clock;
+			ctx->link_rate = 0;
+		}
 
 		had_process_hot_plug(ctx);