Comment 59 for bug 1302090

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda/patch_realtek.c?id=76c2132ec9805120eb724cae4d2a8d30af27b3fd

the introduction of snd_hda_pin_quirk automatically fix some pin default based on the bios pin defaults

not sure those quirks have any impact when you perform some test since those quirk perform fixup silently without any message on system log

the bass speaker playback volume only appear when there are two speaker pin complex and DAC assign to speaker first instead of headphone,

i.e. either two headphone jacks share same DAC

or

need to implement "Speaker+HP" playback volume as the driver try to avoid this kind of sharing volume control