[PATCHv3,0/6] drm/omap: hdmi: improve hdmi4 CEC, add CEC for hdmi5

Message

Hans Verkuil April 28, 2021, 1:25 p.m. UTC

This series improves the drm_bridge support for CEC by introducing two
new bridge ops in the first patch, and using those in the second patch.

This makes it possible to call cec_s_conn_info() and set
CEC_CAP_CONNECTOR_INFO for the CEC adapter, so userspace can associate
the CEC adapter with the corresponding DRM connector.

The third patch simplifies CEC physical address handling by using the
cec_s_phys_addr_from_edid helper function that didn't exist when this
code was originally written.

The fourth patch adds the cec clock to ti,omap5-dss.txt.

The fifth patch the missing cec clock to the dra7 and omap5 device tree,
and the last patch adds CEC support to the OMAP5 driver.

Tested with a Pandaboard and a Beagle X15 board.

Regards,

	Hans

Changes since v2:

- connector_attach can now return an error. If an error is
  returned then connector_detach is called in reverse order
  to clean up any previous connector_attach calls.

- connector_attach in hdmi4 and hdmi5 now return 0.

Changes since v1:

- as per suggestion from Laurent, changed cec_init/exit to
  connector_attach/_detach which are just called for all
  bridges. The DRM_BRIDGE_OP_CEC was dropped.

- added patch to add the cec clock to ti,omap5-dss.txt

- swapped the order of the last two patches

- incorporated Tomi's suggestions for the hdmi5 CEC support.

Hans Verkuil (6):
  drm: drm_bridge: add connector_attach/detach bridge ops
  drm/omapdrm/dss/hdmi4: switch to the connector bridge ops
  drm/omapdrm/dss/hdmi4: simplify CEC Phys Addr handling
  dt-bindings: display: ti: ti,omap5-dss.txt: add cec clock
  dra7.dtsi/omap5.dtsi: add cec clock
  drm/omapdrm/dss/hdmi5: add CEC support

 .../bindings/display/ti/ti,omap5-dss.txt      |   4 +-
 arch/arm/boot/dts/dra7.dtsi                   |   5 +-
 arch/arm/boot/dts/omap5.dtsi                  |   5 +-
 drivers/gpu/drm/drm_bridge_connector.c        |  25 ++-
 drivers/gpu/drm/omapdrm/Kconfig               |   8 +
 drivers/gpu/drm/omapdrm/Makefile              |   1 +
 drivers/gpu/drm/omapdrm/dss/hdmi.h            |   1 +
 drivers/gpu/drm/omapdrm/dss/hdmi4.c           |  41 ++--
 drivers/gpu/drm/omapdrm/dss/hdmi4_cec.c       |  13 +-
 drivers/gpu/drm/omapdrm/dss/hdmi4_cec.h       |  12 +-
 drivers/gpu/drm/omapdrm/dss/hdmi5.c           |  64 +++++-
 drivers/gpu/drm/omapdrm/dss/hdmi5_cec.c       | 209 ++++++++++++++++++
 drivers/gpu/drm/omapdrm/dss/hdmi5_cec.h       |  42 ++++
 drivers/gpu/drm/omapdrm/dss/hdmi5_core.c      |  35 ++-
 drivers/gpu/drm/omapdrm/dss/hdmi5_core.h      |  33 ++-
 include/drm/drm_bridge.h                      |  27 +++
 16 files changed, 470 insertions(+), 55 deletions(-)
 create mode 100644 drivers/gpu/drm/omapdrm/dss/hdmi5_cec.c
 create mode 100644 drivers/gpu/drm/omapdrm/dss/hdmi5_cec.h