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

[Jani Nikula <jani.nikula@linux.intel.com>]

On Wed, 28 Jun 2023, Mitul Golani <mitulkumar.ajitkumar.golani@intel.com> wrote:
> 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.

Why are you sending this so many times? What are the changes between the
versions? People lose track.

BR,
Jani.

>
> 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.
>
> Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>
>
> Mitul Golani (3):
>   drm/i915: Add has_audio to separate audio parameter in crtc_state
>   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    | 115 +++++++++++++++++-
>  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     |   2 +-
>  drivers/gpu/drm/i915/display/intel_sdvo.c     |  10 +-
>  12 files changed, 147 insertions(+), 32 deletions(-)

-- 
Jani Nikula, Intel Open Source Graphics Center