drm/nouveau: Add HD-audio component notifier support

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This patch adds the support for the notification of HD-audio hotplug
via the already existing drm_audio_component framework.  This allows
us more reliable hotplug notification and ELD transfer without
accessing HD-audio bus; it's more efficient, and more importantly, it
works without waking up the runtime PM.

The implementation is rather simplistic: nouveau driver provides the
get_eld ops for HD-audio, and it notifies the audio hotplug via
pin_eld_notify callback upon each nv50_audio_enable() and _disable()
call.  As the HD-audio pin assignment seems corresponding to the CRTC,
the crtc->index number is passed directly as the zero-based port
number.

The bind and unbind callbacks handle the device-link so that it
assures the PM call order.

Link: https://lore.kernel.org/r/20190722143815.7339-3-tiwai@suse.de
Reviewed-by: Lyude Paul <lyude@redhat.com>
Cc: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

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This commit is contained in:

Takashi Iwai 2020-01-13 15:17:21 +01:00 • committed by Ben Skeggs

parent ee8642162a

commit 742db30c4e

3 changed files with 119 additions and 0 deletions

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1

drivers/gpu/drm/nouveau/Kconfig

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111

drivers/gpu/drm/nouveau/dispnv50/disp.c

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7

drivers/gpu/drm/nouveau/nouveau_drv.h

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