@@ -68,6 +68,7 @@ struct hdmi_spec_per_pin {
hda_nid_t pin_nid;
int num_mux_nids;
hda_nid_t mux_nids[HDA_MAX_CONNECTIONS];
+ int mux_idx;
hda_nid_t cvt_nid;
struct hda_codec *codec;
@@ -1343,6 +1344,8 @@ static int hdmi_choose_cvt(struct hda_codec *codec,
if (cvt_idx == spec->num_cvts)
return -ENODEV;
+ per_pin->mux_idx = mux_idx;
+
if (cvt_id)
*cvt_id = cvt_idx;
if (mux_id)
@@ -1351,6 +1354,22 @@ static int hdmi_choose_cvt(struct hda_codec *codec,
return 0;
}
+/* Assure the pin select the right convetor */
+static void intel_verify_pin_cvt_connect(struct hda_codec *codec,
+ struct hdmi_spec_per_pin *per_pin)
+{
+ hda_nid_t pin_nid = per_pin->pin_nid;
+ int mux_idx, curr;
+
+ mux_idx = per_pin->mux_idx;
+ curr = snd_hda_codec_read(codec, pin_nid, 0,
+ AC_VERB_GET_CONNECT_SEL, 0);
+ if (curr != mux_idx)
+ snd_hda_codec_write_cache(codec, pin_nid, 0,
+ AC_VERB_SET_CONNECT_SEL,
+ mux_idx);
+}
+
/* Intel HDMI workaround to fix audio routing issue:
* For some Intel display codecs, pins share the same connection list.
* So a conveter can be selected by multiple pins and playback on any of these
@@ -1775,6 +1794,19 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
bool non_pcm;
int pinctl;
+ if (is_haswell_plus(codec) || is_valleyview(codec)) {
+ /* Verify pin:cvt selections to avoid silent audio after S3.
+ * After S3, the audio driver restores pin:cvt selections
+ * but this can happen before gfx is ready and such selection
+ * is overlooked by HW. Thus multiple pins can share a same
+ * default convertor and mute control will affect each other,
+ * which can cause a resumed audio playback become silent
+ * after S3.
+ */
+ intel_verify_pin_cvt_connect(codec, per_pin);
+ intel_not_share_assigned_cvt(codec, pin_nid, per_pin->mux_idx);
+ }
+
non_pcm = check_non_pcm_per_cvt(codec, cvt_nid);
mutex_lock(&per_pin->lock);
per_pin->channels = substream->runtime->channels;
This is a note to let you know that I have just added a patch titled ALSA: hda - verify pin:cvt connection on preparing a stream for Intel HDMI codec to the linux-3.13.y-queue branch of the 3.13.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.13.y-queue This patch is scheduled to be released in version 3.13.11.6. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.13.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ------ From 350cc11e2909effb79a5b47ffc7aebbc6592d013 Mon Sep 17 00:00:00 2001 From: Mengdong Lin <mengdong.lin@intel.com> Date: Thu, 20 Mar 2014 13:01:06 +0800 Subject: ALSA: hda - verify pin:cvt connection on preparing a stream for Intel HDMI codec commit 2df6742f613840a0b0a1590fb28f7af5b058a673 upstream. This is a temporary fix for some Intel HDMI codecs to avoid no sound output for a resuming playback after S3. After S3, the audio driver restores pin:cvt connection selections by snd_hda_codec_resume_cache(). However this can happen before the gfx side is ready and such connect selection is overlooked by HW. After gfx is ready, the pins make the default selection again. And this will cause multiple pins share a same convertor and mute control will affect each other. Thus a resumed audio playback become silent after S3. This patch verifies pin:cvt connection on preparing a stream, to assure the pin selects the right convetor and an assigned convertor is not shared by other unused pins. Apply this fix-up on Haswell, Broadwell and Valleyview (Baytrail). We need this temporary fix before a reliable software communication channel is established between audio and gfx, to sync audio/gfx operations. Signed-off-by: Mengdong Lin <mengdong.lin@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Cc: David Henningsson <david.henningsson@canonical.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- sound/pci/hda/patch_hdmi.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) -- 1.9.1