[PATCH 0/2] drm/bridge: it6505: DP audio support + shared-DAI hw_params fix

[Daniel Golle <daniel@makrotopia.org>]

This revives Jiaxin Yu's stalled "drm/bridge: it6505: Add audio support"
v3 [1], rebased onto current mainline, plus the fix needed to make it work
on boards where the it6505 DP output shares an I2S DAI with another codec.

Patch 1 wires up the previously-unused it6505 audio helpers via
hdmi_codec_ops, which unblocks the mt8186-mt6366 sound card that
references it6505 as the I2S3 codec.

Patch 2 stops it6505_audio_setup_hw_params() from returning -ENODEV when
no DP display is attached, which would otherwise tear down the shared
backend and break playback on the co-located codec (the speaker).

Tested on a MediaTek MT8186 (google,steelix) Chromebook: speaker and
built-in mic work. Actual HDMI/DP audio output could not be tested as the
sample exposes no usable DP-audio port.

[1] https://lore.kernel.org/all/20230730180803.22570-4-jiaxin.yu@mediatek.com/
Daniel Golle (1):
  drm/bridge: it6505: Don't reject audio hw_params without an encoder

Jiaxin Yu (1):
  drm/bridge: it6505: Add audio support

 drivers/gpu/drm/bridge/ite-it6505.c | 94 +++++++++++++++++++++++------
 1 file changed, 77 insertions(+), 17 deletions(-)


base-commit: 0718283ab28bc3907e10b61a6b4be6fefa1cbb2f
prerequisite-patch-id: 0000000000000000000000000000000000000000
-- 
2.55.0