It's not uncommon for the particular device to support only a subset of HDMI InfoFrames. It's not a big problem for the kernel, since we adopted a model of ignoring the unsupported Infoframes, but it's a bigger problem for the userspace: we end up having files in debugfs which do mot match what is being sent on the wire. Sort that out, making sure that all interfaces are consistent. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx> --- Changes in v3: - Fixed supported infoframes initialization (Liu Ying) - Implemented separate flags for DRM-generated InfoFrames and hardware-generated ones - Warn if required InfoFrames are not supported by the driver (Maxime) - Changed drivers to error out if the DRM framework requires the unsupported InfoFrame (Maxime) - Implemented DRM_BRIDGE_OP_HDMI and DRM_BRIDGE_OP_HDMI_AUDIO for Lontium lt9611uxc bridge. - Link to v2: https://lore.kernel.org/r/20250819-drm-limit-infoframes-v2-0-7595dda24fbd@xxxxxxxxxxxxxxxx Changes in v2: - Corrected whitespace / newline issues & other small syntax fixes (Liu Ying) - Added audio to the list of InfoFrames supported by the VC4 driver (Liu Ying) - Changed drm_dbg_kms() to drm_warn_once() in the Audio InfoFrame update code (Liu Ying) - Corrected subject for ITE IT6263 patch (Liu Ying) - Added patch, dropping default list of InfoFrames in drm_bridge_connector. - Link to v1: https://lore.kernel.org/r/20250816-drm-limit-infoframes-v1-0-6dc17d5f07e9@xxxxxxxxxxxxxxxx --- Dmitry Baryshkov (11): drm/connector: let drivers declare infoframes as unsupported drm/bridge: adv7511: declare supported infoframes drm/bridge: ite-it6263: declare supported infoframes drm/bridge: lontium-lt9611: declare supported infoframes drm/bridge: synopsys/dw-hdmi-qp: declare supported infoframes drm/msm: hdmi: declare supported infoframes drm/rockchip: rk3066: declare supported infoframes drm/display: bridge_connector: drop default list for HDMI Infoframes drm/connector: verify that HDMI connectors support necessary InfoFrames drm/display: hdmi-audio: warn if HDMI connector doesn't support Audio IF drm/bridge: lontium-lt9611uxc: switch to HDMI audio helpers drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 10 +- drivers/gpu/drm/bridge/ite-it6263.c | 11 +- drivers/gpu/drm/bridge/lontium-lt9611.c | 11 +- drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 130 +++++++++------------ drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c | 7 +- drivers/gpu/drm/display/drm_bridge_connector.c | 2 + drivers/gpu/drm/display/drm_hdmi_audio_helper.c | 12 ++ drivers/gpu/drm/display/drm_hdmi_state_helper.c | 53 ++++++++- drivers/gpu/drm/drm_connector.c | 17 +++ drivers/gpu/drm/drm_debugfs.c | 16 ++- drivers/gpu/drm/msm/hdmi/hdmi_bridge.c | 8 +- drivers/gpu/drm/rockchip/inno_hdmi.c | 6 +- drivers/gpu/drm/rockchip/rk3066_hdmi.c | 5 +- drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c | 4 +- drivers/gpu/drm/tests/drm_connector_test.c | 49 ++++++++ drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c | 9 ++ drivers/gpu/drm/vc4/vc4_hdmi.c | 6 + include/drm/drm_bridge.h | 14 +++ include/drm/drm_connector.h | 39 +++++++ 19 files changed, 306 insertions(+), 103 deletions(-) --- base-commit: f4028ef65dc4fe9010bcc017597fe0fea6479097 change-id: 20250815-drm-limit-infoframes-e782fa7f3360 Best regards, -- With best wishes Dmitry
