This is a rework of Dariusz' v7 series: https://www.spinics.net/lists/linux-media/msg151117.html Rather than changing the existing CEC kAPI to allocate and register CEC adapters I left it as-is. Instead new notifiers functions are added to (un)register HDMI connector and CEC adapter notifiers. These replace the current cec_notifier_get_conn and _put functions. For drivers that don't use notifiers the cec_s_conn_info function was created so the connector info can be set directly as well. This split in separate connector and CEC adapter functions is needed since the notifier information is different between the two and this makes it future proof since we will need to eventually support more than one CEC adapter per HDMI connector. By carefully designing these functions it is possible to convert drivers to these new functions one-by-one, rather than as a painful big-bang patch. The plan is to merge the first three patches for kernel 5.3: these patches provide the infrastructure needed by drm and cec drivers to do the conversion during the 5.4 cycle, without requiring patches that touch on multiple subsystems. Once the conversion is done the new connector API can be exposed. A patch documenting the new API is included as well, but it is old and needs updating (the new CEC_CAP_CONNECTOR_INFO capability isn't documented, and neither is the new 'have_connector_info' field of the state changed event). Various drivers have been converted as well as an example. These are based on Dariusz' original series, but using the new notifier functions. Regards, Hans Dariusz Marcinkiewicz (9): cec: add struct cec_connector_info support cec: expose the new connector info API drm_dp_cec: add connector info support. drm/i915/intel_hdmi: use cec_notifier_conn_(un)register dw-hdmi-cec: use cec_notifier_cec_adap_(un)register dw-hdmi: use cec_notifier_conn_(un)register tda9950: use cec_notifier_cec_adap_(un)register tda998x: use cec_notifier_conn_(un)register drm/vc4/vc4_hdmi: fill in connector info Hans Verkuil (4): cec-notifier: rename variable, check kstrdup cec: add new notifier functions cec: document CEC_ADAP_G_CONNECTOR_INFO meson/ao-cec: use cec_notifier_cec_adap_(un)register Documentation/media/uapi/cec/cec-funcs.rst | 1 + .../uapi/cec/cec-ioc-adap-g-conn-info.rst | 109 +++++++++++++++++ .../display/amdgpu_dm/amdgpu_dm_mst_types.c | 2 +- drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c | 9 +- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 104 +++++++++------- drivers/gpu/drm/drm_dp_cec.c | 25 ++-- drivers/gpu/drm/i2c/tda9950.c | 11 +- drivers/gpu/drm/i2c/tda998x_drv.c | 56 ++++----- drivers/gpu/drm/i915/intel_dp.c | 4 +- drivers/gpu/drm/i915/intel_hdmi.c | 13 +- drivers/gpu/drm/nouveau/nouveau_connector.c | 3 +- drivers/gpu/drm/vc4/vc4_hdmi.c | 13 +- drivers/media/cec/cec-adap.c | 31 +++++ drivers/media/cec/cec-api.c | 16 +++ drivers/media/cec/cec-notifier.c | 115 ++++++++++++++++-- drivers/media/platform/meson/ao-cec.c | 37 +++--- include/drm/drm_dp_helper.h | 14 +-- include/media/cec-notifier.h | 78 ++++++++++++ include/media/cec.h | 19 +++ include/uapi/linux/cec.h | 33 +++++ 20 files changed, 550 insertions(+), 143 deletions(-) create mode 100644 Documentation/media/uapi/cec/cec-ioc-adap-g-conn-info.rst -- 2.20.1
