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ALSA: hda/hdmi: let new platforms assign the pcm slot dynamically 

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@suse.de>
Suggested-and-reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Link: https://lore.kernel.org/r/20210301111202.2684-1-hui.wang@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
master
Hui Wang 2021-03-01 19:12:02 +08:00 committed by Takashi Iwai
parent 48698c973e
commit 13046370c4
1 changed files with 17 additions and 1 deletions
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18
sound/pci/hda/patch_hdmi.c
View File

@ -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
@ -1345,6 +1346,12 @@ 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')
@ -1374,6 +1381,7 @@ 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))
@ -2987,8 +2995,16 @@ 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 */