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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [BXT/KBL] - HDMI - HD audio passthrough dont work"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98797#c93">Comment # 93</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [BXT/KBL] - HDMI - HD audio passthrough dont work"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98797">bug 98797</a>
from <span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span></b>
<pre>(In reply to chrisk2305 from <a href="show_bug.cgi?id=98797#c92">comment #92</a>)
<span class="quote">> It is proven in this thread:
> <a href="https://forum.kodi.tv/showthread.php?tid=270298&page=95">https://forum.kodi.tv/showthread.php?tid=270298&page=95</a>
>
> All Windows Users can use HD Audio passthrough via the HDMI 2.0 (LSPCON)
> with FW 1.66.</span >
I'll take your word for it, rather than go through 95 pages of forums... ugh.
---
Random debug note: We don't consider audio bandwidth requirements for link
training, only video mode. If the video mode just barely fits in the link, I
think it'll impact audio.
Quick hack to try:
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 76c8a0bd17f9..983e78b4dc18 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1713,6 +1713,9 @@ intel_dp_compute_config(struct intel_encoder *encoder,
min_clock = max_clock;
}
+ min_lane_count = max_lane_count;
+ min_clock = max_clock;
+
for (; bpp >= 6*3; bpp -= 2*3) {
mode_rate = intel_dp_link_required(adjusted_mode->crtc_clock,
bpp);</pre>
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