drm/i915: Fix has_audio readout for DDI A

Transcoder EDP does not support audio. Let's not try to
read the state of the audio enable bit HSW_AUD_PIN_ELD_CP_VLD
based on the pipe when using transcoder EDP.

While at it make the function static and flatten it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171129164303.18793-3-ville.syrjala@linux.intel.com
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index eff3b51..48ba9b7 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -2513,17 +2513,17 @@ void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp)
        udelay(600);
 }
 
-bool intel_ddi_is_audio_enabled(struct drm_i915_private *dev_priv,
-                                struct intel_crtc *intel_crtc)
+static bool intel_ddi_is_audio_enabled(struct drm_i915_private *dev_priv,
+                                      enum transcoder cpu_transcoder)
 {
-       u32 temp;
+       if (cpu_transcoder == TRANSCODER_EDP)
+               return false;
 
-       if (intel_display_power_is_enabled(dev_priv, POWER_DOMAIN_AUDIO)) {
-               temp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
-               if (temp & AUDIO_OUTPUT_ENABLE(intel_crtc->pipe))
-                       return true;
-       }
-       return false;
+       if (!intel_display_power_is_enabled(dev_priv, POWER_DOMAIN_AUDIO))
+               return false;
+
+       return I915_READ(HSW_AUD_PIN_ELD_CP_VLD) &
+               AUDIO_OUTPUT_ENABLE(cpu_transcoder);
 }
 
 void intel_ddi_compute_min_voltage_level(struct drm_i915_private *dev_priv,
@@ -2616,7 +2616,7 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
        }
 
        pipe_config->has_audio =
-               intel_ddi_is_audio_enabled(dev_priv, intel_crtc);
+               intel_ddi_is_audio_enabled(dev_priv, cpu_transcoder);
 
        if (encoder->type == INTEL_OUTPUT_EDP && dev_priv->vbt.edp.bpp &&
            pipe_config->pipe_bpp > dev_priv->vbt.edp.bpp) {

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 64426d3..82d637d 100644 (file)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1288,8 +1288,6 @@ intel_ddi_get_crtc_new_encoder(struct intel_crtc_state *crtc_state);
 void intel_ddi_set_pipe_settings(const struct intel_crtc_state *crtc_state);
 void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp);
 bool intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector);
-bool intel_ddi_is_audio_enabled(struct drm_i915_private *dev_priv,
-                                struct intel_crtc *intel_crtc);
 void intel_ddi_get_config(struct intel_encoder *encoder,
                          struct intel_crtc_state *pipe_config);