• Manasi Navare's avatar
    drm/dsc: Add helpers for DSC picture parameter set infoframes · a408c857
    Manasi Navare authored
    According to Display Stream compression spec 1.2, the picture
    parameter set metadata is sent from source to sink device
    using the DP Secondary data packet. An infoframe is formed
    for the PPS SDP header and PPS SDP payload bytes.
    This patch adds helpers to fill the PPS SDP header
    and PPS SDP payload according to the DSC 1.2 specification.
    
    v7:
    * Use BUILD_BUG_ON() to protect changing struct size (Ville)
    * Remove typecaseting (Ville)
    * Include byteorder.h in drm_dsc.c (Ville)
    * Correct kernel doc spacing (Anusha)
    v6:
    * Use proper sequence points for breaking down the
    assignments (Chris Wilson)
    * Use SPDX identifier
    v5:
    Do not use bitfields for DRM structs (Jani N)
    v4:
    * Use DSC constants for params that dont change across
    configurations
    v3:
    * Add reference to added kernel-docs in
    Documentation/gpu/drm-kms-helpers.rst (Daniel Vetter)
    
    v2:
    * Add EXPORT_SYMBOL for the drm functions (Manasi)
    
    Cc: dri-devel@lists.freedesktop.org
    Cc: Jani Nikula <jani.nikula@linux.intel.com>
    Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
    Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
    Cc: Harry Wentland <harry.wentland@amd.com>
    Signed-off-by: default avatarManasi Navare <manasi.d.navare@intel.com>
    Acked-by: default avatarHarry Wentland <harry.wentland@amd.com>
    Reviewed-by: default avatarAnusha Srivatsa <anusha.srivatsa@intel.com>
    Acked-by: Sean Paul <seanpaul@chromium.org> (For merging through
    drm-intel)
    Link: https://patchwork.freedesktop.org/patch/msgid/20181127214125.17658-5-manasi.d.navare@intel.com
    a408c857
drm_dsc.h 13.9 KB