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Takashi Iwai authored
The recent code refactoring for HD-audio HDMI codec driver caused a regression on AMD/ATI HDMI codecs; namely, PulseAudioand pipewire don't recognize HDMI outputs any longer while the direct output via ALSA raw access still works. The problem turned out that, after the code refactoring, the driver assumes only the dynamic PCM assignment, and when a PCM stream that still isn't assigned to any pin gets opened, the driver tries to assign any free converter to the PCM stream. This behavior is OK for Intel and other codecs, as they have arbitrary connections between pins and converters. OTOH, on AMD chips that have a 1:1 mapping between pins and converters, this may end up with blocking the open of the next PCM stream for the pin that is tied with the formerly taken converter. Also, with the code refactoring, more PCM streams are exposed than necessary as we assume all converters can be used, while this isn't true for AMD case. This may change the PCM stream assignment and confuse users as well. This patch fixes those problems by: - Introducing a flag spec->static_pcm_mapping, and if it's set, the driver applies the static mapping between pins and converters at the probe time - Limiting the number of PCM streams per pins, too; this avoids the superfluous PCM streams Fixes: ef6f5494 ("ALSA: hda/hdmi: Use only dynamic PCM device allocation") Cc: <stable@vger.kernel.org> Link: https://bugzilla.kernel.org/show_bug.cgi?id=216836Co-developed-by: Jaroslav Kysela <perex@perex.cz> Signed-off-by: Jaroslav Kysela <perex@perex.cz> Link: https://lore.kernel.org/r/20221228125714.16329-1-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>
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