1 files changed, 53 insertions, 4 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_audio.c b/drivers/gpu/drm/i915/display/intel_audio.c
index 32aa9ec1a204..ce8a4319a63c 100644
--- a/drivers/gpu/drm/i915/display/intel_audio.c
+++ b/drivers/gpu/drm/i915/display/intel_audio.c
@@ -681,12 +681,11 @@ static void ibx_audio_codec_enable(struct intel_encoder *encoder,
 
 void intel_audio_sdp_split_update(const struct intel_crtc_state *crtc_state)
 {
-	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
-	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+	struct intel_display *display = to_intel_display(crtc_state);
 	enum transcoder trans = crtc_state->cpu_transcoder;
 
-	if (HAS_DP20(i915))
-		intel_de_rmw(i915, AUD_DP_2DOT0_CTRL(trans), AUD_ENABLE_SDP_SPLIT,
+	if (HAS_DP20(display))
+		intel_de_rmw(display, AUD_DP_2DOT0_CTRL(trans), AUD_ENABLE_SDP_SPLIT,
 			     crtc_state->sdp_split_enable ? AUD_ENABLE_SDP_SPLIT : 0);
 }
 
@@ -699,10 +698,12 @@ bool intel_audio_compute_config(struct intel_encoder *encoder,
 	const struct drm_display_mode *adjusted_mode =
 		&crtc_state->hw.adjusted_mode;
 
+	mutex_lock(&connector->eld_mutex);
 	if (!connector->eld[0]) {
 		drm_dbg_kms(&i915->drm,
 			    "Bogus ELD on [CONNECTOR:%d:%s]\n",
 			    connector->base.id, connector->name);
+		mutex_unlock(&connector->eld_mutex);
 		return false;
 	}
 
@@ -710,6 +711,7 @@ bool intel_audio_compute_config(struct intel_encoder *encoder,
 	memcpy(crtc_state->eld, connector->eld, sizeof(crtc_state->eld));
 
 	crtc_state->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2;
+	mutex_unlock(&connector->eld_mutex);
 
 	return true;
 }
@@ -978,6 +980,53 @@ retry:
 	drm_modeset_acquire_fini(&ctx);
 }
 
+int intel_audio_min_cdclk(const struct intel_crtc_state *crtc_state)
+{
+	struct intel_display *display = to_intel_display(crtc_state);
+	struct drm_i915_private *dev_priv = to_i915(display->drm);
+	int min_cdclk = 0;
+
+	if (!crtc_state->has_audio)
+		return 0;
+
+	/* BSpec says "Do not use DisplayPort with CDCLK less than 432 MHz,
+	 * audio enabled, port width x4, and link rate HBR2 (5.4 GHz), or else
+	 * there may be audio corruption or screen corruption." This cdclk
+	 * restriction for GLK is 316.8 MHz.
+	 */
+	if (intel_crtc_has_dp_encoder(crtc_state) &&
+	    crtc_state->port_clock >= 540000 &&
+	    crtc_state->lane_count == 4) {
+		if (DISPLAY_VER(display) == 10) {
+			/* Display WA #1145: glk */
+			min_cdclk = max(min_cdclk, 316800);
+		} else if (DISPLAY_VER(display) == 9 || IS_BROADWELL(dev_priv)) {
+			/* Display WA #1144: skl,bxt */
+			min_cdclk = max(min_cdclk, 432000);
+		}
+	}
+
+	/*
+	 * According to BSpec, "The CD clock frequency must be at least twice
+	 * the frequency of the Azalia BCLK." and BCLK is 96 MHz by default.
+	 */
+	if (DISPLAY_VER(display) >= 9)
+		min_cdclk = max(min_cdclk, 2 * 96000);
+
+	/*
+	 * "For DP audio configuration, cdclk frequency shall be set to
+	 *  meet the following requirements:
+	 *  DP Link Frequency(MHz) | Cdclk frequency(MHz)
+	 *  270                    | 320 or higher
+	 *  162                    | 200 or higher"
+	 */
+	if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
+	    intel_crtc_has_dp_encoder(crtc_state))
+		min_cdclk = max(min_cdclk, crtc_state->port_clock);
+
+	return min_cdclk;
+}
+
 static unsigned long i915_audio_component_get_power(struct device *kdev)
 {
 	struct intel_display *display = to_intel_display(kdev);