On 08/19/2025, Dmitry Baryshkov wrote:

Currently DRM framework expects that the HDMI connector driver supports
all infoframe types: it generates the data as required and calls into
the driver to program all of them, letting the driver to soft-fail if
the infoframe is unsupported. This has a major drawback on userspace
API: the framework also registers debugfs files for all Infoframe types,
possibly surprising the users when infoframe is visible in the debugfs
file, but it is not visible on the wire.

Let drivers declare that they support only a subset of infoframes,
creating a more consistent interface.

Signed-off-by: Dmitry Baryshkov <redacted>
---
 drivers/gpu/drm/display/drm_bridge_connector.c     |  6 ++++
 drivers/gpu/drm/display/drm_hdmi_state_helper.c    | 37 ++++++++++++++++++++--
 drivers/gpu/drm/drm_connector.c                    |  4 +++
 drivers/gpu/drm/drm_debugfs.c                      | 16 +++++++---
 drivers/gpu/drm/rockchip/inno_hdmi.c               |  1 +
 drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c             |  1 +
 drivers/gpu/drm/tests/drm_connector_test.c         | 28 ++++++++++++++++
 drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c |  8 +++++
 drivers/gpu/drm/vc4/vc4_hdmi.c                     |  5 +++
 include/drm/drm_bridge.h                           |  7 ++++
 include/drm/drm_connector.h                        | 22 +++++++++++++
 11 files changed, 128 insertions(+), 7 deletions(-)

Acked-by: Liu Ying <victor.liu@nxp.com>