This is a note to let you know that I've just added the patch titled
ALSA: hda/hdmi: let new platforms assign the pcm slot dynamically
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-hda-hdmi-let-new-platforms-assign-the-pcm-slot-.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5f942a8563f450334b902bc1140209ec313cb8b2
Author: Hui Wang <hui.wang@xxxxxxxxxxxxx>
Date: Mon Mar 1 19:12:02 2021 +0800
ALSA: hda/hdmi: let new platforms assign the pcm slot dynamically
[ Upstream commit 13046370c4d143b629adc1a51659a8a6497fbbe6 ]
If the platform set the dyn_pcm_assign to true, it will call
hdmi_find_pcm_slot() to find a pcm slot when hdmi/dp monitor is
connected and need to create a pcm.
So far only intel_hsw_common_init() and patch_nvhdmi() set the
dyn_pcm_assign to true, here we let tgl platforms assign the pcm slot
dynamically first, if the driver runs for a period of time and there
is no regression reported, we could set no_fixed_assgin to true in
the intel_hsw_common_init(), and then set it to true in the
patch_nvhdmi().
This change comes from the discussion between Takashi and
Kai Vehmanen. Please refer to:
https://github.com/alsa-project/alsa-lib/pull/118
Suggested-and-reviewed-by: Takashi Iwai <tiwai@xxxxxxx>
Suggested-and-reviewed-by: Kai Vehmanen <kai.vehmanen@xxxxxxxxxxxxxxx>
Signed-off-by: Hui Wang <hui.wang@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210301111202.2684-1-hui.wang@xxxxxxxxxxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Stable-dep-of: f89e409402e2 ("ALSA: hda: Fix Nvidia dp infoframe")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 7551cdf3b452..6110370f874d 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -157,6 +157,7 @@ struct hdmi_spec {
bool dyn_pin_out;
bool dyn_pcm_assign;
+ bool dyn_pcm_no_legacy;
bool intel_hsw_fixup; /* apply Intel platform-specific fixups */
/*
* Non-generic VIA/NVIDIA specific
@@ -1348,6 +1349,12 @@ static int hdmi_find_pcm_slot(struct hdmi_spec *spec,
{
int i;
+ /* on the new machines, try to assign the pcm slot dynamically,
+ * not use the preferred fixed map (legacy way) anymore.
+ */
+ if (spec->dyn_pcm_no_legacy)
+ goto last_try;
+
/*
* generic_hdmi_build_pcms() may allocate extra PCMs on some
* platforms (with maximum of 'num_nids + dev_num - 1')
@@ -1377,6 +1384,7 @@ static int hdmi_find_pcm_slot(struct hdmi_spec *spec,
return i;
}
+ last_try:
/* the last try; check the empty slots in pins */
for (i = 0; i < spec->num_nids; i++) {
if (!test_bit(i, &spec->pcm_bitmap))
@@ -3010,8 +3018,16 @@ static int patch_i915_tgl_hdmi(struct hda_codec *codec)
* the index indicate the port number.
*/
static const int map[] = {0x4, 0x6, 0x8, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf};
+ int ret;
- return intel_hsw_common_init(codec, 0x02, map, ARRAY_SIZE(map));
+ ret = intel_hsw_common_init(codec, 0x02, map, ARRAY_SIZE(map));
+ if (!ret) {
+ struct hdmi_spec *spec = codec->spec;
+
+ spec->dyn_pcm_no_legacy = true;
+ }
+
+ return ret;
}
/* Intel Baytrail and Braswell; with eld notifier */
