@@ -978,6 +978,51 @@ static void glk_force_audio_cdclk(struct drm_i915_private *i915,
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;
+
+ /* 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->has_audio &&
+ crtc_state->port_clock >= 540000 &&
+ crtc_state->lane_count == 4) {
+ if (DISPLAY_VER(display) == 10) {
+ /* Display WA #1145: glk */
+ min_cdclk = max(316800, min_cdclk);
+ } else if (DISPLAY_VER(display) == 9 || IS_BROADWELL(dev_priv)) {
+ /* Display WA #1144: skl,bxt */
+ min_cdclk = max(432000, min_cdclk);
+ }
+ }
+
+ /*
+ * 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 (crtc_state->has_audio && DISPLAY_VER(display) >= 9)
+ min_cdclk = max(2 * 96000, min_cdclk);
+
+ /*
+ * "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) && crtc_state->has_audio)
+ min_cdclk = max(crtc_state->port_clock, min_cdclk);
+
+ return min_cdclk;
+}
+
static unsigned long i915_audio_component_get_power(struct device *kdev)
{
struct intel_display *display = to_intel_display(kdev);
@@ -27,6 +27,7 @@ void intel_audio_codec_get_config(struct intel_encoder *encoder,
struct intel_crtc_state *crtc_state);
void intel_audio_cdclk_change_pre(struct drm_i915_private *dev_priv);
void intel_audio_cdclk_change_post(struct drm_i915_private *dev_priv);
+int intel_audio_min_cdclk(const struct intel_crtc_state *crtc_state);
void intel_audio_init(struct drm_i915_private *dev_priv);
void intel_audio_register(struct drm_i915_private *i915);
void intel_audio_deinit(struct drm_i915_private *dev_priv);
@@ -2858,42 +2858,7 @@ int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state)
min_cdclk = intel_pixel_rate_to_cdclk(crtc_state);
min_cdclk = max(hsw_ips_min_cdclk(crtc_state), min_cdclk);
-
- /* 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->has_audio &&
- crtc_state->port_clock >= 540000 &&
- crtc_state->lane_count == 4) {
- if (DISPLAY_VER(display) == 10) {
- /* Display WA #1145: glk */
- min_cdclk = max(316800, min_cdclk);
- } else if (DISPLAY_VER(display) == 9 || IS_BROADWELL(dev_priv)) {
- /* Display WA #1144: skl,bxt */
- min_cdclk = max(432000, min_cdclk);
- }
- }
-
- /*
- * 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 (crtc_state->has_audio && DISPLAY_VER(display) >= 9)
- min_cdclk = max(2 * 96000, min_cdclk);
-
- /*
- * "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) && crtc_state->has_audio)
- min_cdclk = max(crtc_state->port_clock, min_cdclk);
+ min_cdclk = max(intel_audio_min_cdclk(crtc_state), min_cdclk);
/*
* On Valleyview some DSI panels lose (v|h)sync when the clock is lower