A lot of DisplayPort bridges use HDMI Codec in order to provide audio support. Present DRM HDMI Audio support has been written with the HDMI and in particular DRM HDMI Connector framework support, however those audio helpers can be easily reused for DisplayPort drivers too. Patches by Hermes Wu that targeted implementing HDMI Audio support in the iTE IT6506 driver pointed out the necessity of allowing one to use generic audio helpers for DisplayPort drivers, as otherwise each driver has to manually (and correctly) implement the get_eld() and plugged_cb support. Implement necessary integration in drm_bridge_connector and provide an example implementation in the msm/dp driver. The plan is to land core parts via the drm-misc-next tree and msm patch via the msm-next tree. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> --- Changes in v3: - Dropped DRM_BRIDGE_OP_DisplayPort, added DRM_BRIDGE_OP_HDMI_AUDIO (Laurent, Maxime) - Dropped the subconnector patch (again) - Link to v2: https://lore.kernel.org/r/20250209-dp-hdmi-audio-v2-0-16db6ebf22ff@xxxxxxxxxx Changes in v2: - Added drm_connector_attach_dp_subconnector_property() patches - Link to v1: https://lore.kernel.org/r/20250206-dp-hdmi-audio-v1-0-8aa14a8c0d4d@xxxxxxxxxx --- Dmitry Baryshkov (2): drm/bridge: split HDMI Audio from DRM_BRIDGE_OP_HDMI drm/msm/dp: reuse generic HDMI codec implementation drivers/gpu/drm/bridge/lontium-lt9611.c | 2 +- drivers/gpu/drm/display/drm_bridge_connector.c | 59 +++++++---- drivers/gpu/drm/msm/Kconfig | 1 + drivers/gpu/drm/msm/dp/dp_audio.c | 131 +++---------------------- drivers/gpu/drm/msm/dp/dp_audio.h | 27 ++--- drivers/gpu/drm/msm/dp/dp_display.c | 28 +----- drivers/gpu/drm/msm/dp/dp_display.h | 6 -- drivers/gpu/drm/msm/dp/dp_drm.c | 8 ++ include/drm/drm_bridge.h | 23 ++++- 9 files changed, 90 insertions(+), 195 deletions(-) --- base-commit: 0e9eb9d5dfffee443c2765f86625b3a6d2659e95 change-id: 20250206-dp-hdmi-audio-15d9fdbebb9f Best regards, -- Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
