ALSA: hda/hdmi: fix warning about PCM count when used with SOF

stable inclusion
from stable-v5.10.147
commit 98f722cc2438d16b8949fdce712feb1fbf9699e8
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6D0W8

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=98f722cc2438d16b8949fdce712feb1fbf9699e8

--------------------------------

commit c7419378 upstream.

With commit 13046370 ("ALSA: hda/hdmi: let new platforms assign the
pcm slot dynamically"), old behaviour to consider the HDA pin number,
when choosing PCM to assign, was dropped.

Build on this change and limit the number of PCMs created to number of
converters (= maximum number of concurrent display/receivers) when
"mst_no_extra_pcms" and "dyn_pcm_no_legacy" quirks are both set.

Fix the check in hdmi_find_pcm_slot() to ensure only spec->pcm_used
entries are considered in the search. Elsewhere in the driver
spec->pcm_used is already checked properly.

Doing this avoids following warning at SOF driver probe for multiple
machine drivers:

[  112.425297] sof_sdw sof_sdw: hda_dsp_hdmi_build_controls: no
PCM in topology for HDMI converter 4
[  112.425298] sof_sdw sof_sdw: hda_dsp_hdmi_build_controls: no
PCM in topology for HDMI converter 5
[  112.425299] sof_sdw sof_sdw: hda_dsp_hdmi_build_controls: no
PCM in topology for HDMI converter 6

Fixes: 13046370 ("ALSA: hda/hdmi: let new platforms assign the pcm slot dynamically")
BugLink: https://github.com/thesofproject/linux/issues/2573


Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20220414150516.3638283-1-kai.vehmanen@linux.intel.com


Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>
Reviewed-by: Zheng Zengkai <zhengzengkai@huawei.com>