[Intel-gfx] [RFC 0/3] Get optimal audio frequency and channels

[Mitul Golani]

Currently we do not check if there is enough bandwidth for
audio, and what channels and freq it can really support.
Also sometimes there can be HW constraints e.g. GLK where audio
channels supported are only 2.

https://patchwork.freedesktop.org/series/107647/

Obtain the optimal audio rate and channel based on available display
timing constraints.

This can be achieved by:
- Retrieve the supported channel and rate information from SADs
- Adding audio-related config parameters in the CRTC state, such
as audio support, rate, and channel.
- Initializing the audio config parameters with the maximum supported
rate and channel by the audio source.
- Computing the SADs based on the audio source's capabilities.

Mitul Golani (3):
  drm/i915/hdmi: Optimize source audio parameter handling
  drm/i915/display: Configure and initialize HDMI audio capabilities
  drm/i915/display: Add wrapper to Compute SAD

 drivers/gpu/drm/i915/display/g4x_dp.c         |  4 +-
 drivers/gpu/drm/i915/display/g4x_hdmi.c       | 16 ++--
 drivers/gpu/drm/i915/display/intel_audio.c    | 75 ++++++++++++++++++-
 drivers/gpu/drm/i915/display/intel_audio.h    |  4 +
 drivers/gpu/drm/i915/display/intel_cdclk.c    |  6 +-
 .../drm/i915/display/intel_crtc_state_dump.c  |  4 +-
 drivers/gpu/drm/i915/display/intel_ddi.c      |  2 +-
 drivers/gpu/drm/i915/display/intel_display.c  |  4 +-
 .../drm/i915/display/intel_display_types.h    | 12 ++-
 drivers/gpu/drm/i915/display/intel_dp.c       |  2 +-
 drivers/gpu/drm/i915/display/intel_dp_mst.c   |  2 +-
 drivers/gpu/drm/i915/display/intel_hdmi.c     | 38 +++++++++-
 drivers/gpu/drm/i915/display/intel_hdmi.h     |  1 +
 drivers/gpu/drm/i915/display/intel_sdvo.c     | 10 +--
 14 files changed, 148 insertions(+), 32 deletions(-)

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2.25.1