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| author | Hui Wang <hui.wang@canonical.com> | 2021-03-01 19:12:02 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2021-03-02 18:35:56 +0100 |
| commit | 13046370c4d143b629adc1a51659a8a6497fbbe6 (patch) | |
| tree | 807f2f03ff3ec9aa7a331e2be02ad89286eac520 /sound | |
| parent | 48698c973e6b4dde94d87cd1ded56d9436e9c97d (diff) | |
| download | lwn-13046370c4d143b629adc1a51659a8a6497fbbe6.tar.gz lwn-13046370c4d143b629adc1a51659a8a6497fbbe6.zip | |
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>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/patch_hdmi.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index e405be7929e3..e6d0843ee9df 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 @@ -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 */ |