@@ -633,10 +633,46 @@ long as that supports DMA. Otherwise importing can still needlessly fail.
Contact: Thomas Zimmermann <tzimmermann@suse.de>, Daniel Vetter
Level: Advanced
+Improve HDMI Infrastructure
+---------------------------
+
+We have a bunch of helpers to handle HDMI and reduce the boilerplate in
+drivers. Support so far includes HDMI 1.4 support, but we need to extend
+it with:
+
+ - CEC handling support. CEC requires a bit of integration into every
+ HDMI driver to set the device physical address according to the EDID
+ in `.get_modes`, and to clear/reset it in the hotplug detection
+ path. We should create the ``drm_atomic_helper_connector_hdmi_get_modes()``
+ and ``drm_atomic_helper_connector_hdmi_handle_hotplug()`` helpers to handle
+ this properly, and convert drivers to use them.
+
+ - In order to support HDMI 2.0 properly, the scrambler parameters need
+ to be moved into the state. This includes figuring out in
+ drm_atomic_helper_connector_hdmi_check() if the scrambler and TMDS ratio
+ need to be changed, and make the
+ ``drm_atomic_helper_connector_hdmi_handle_hotplug()`` helper reset the
+ scrambler status when the device is plugged and unplugged.
+
+ - We need to support YUV420 too.
+
+ - Make the audio support somewhat generic too. The lowest hanging fruits
+ would be to provide helpers for `get_eld`, to handle hotplug and compute
+ ACR, N, and CTS parameters.
+
+ - Handling HDCP in a generic manner would be a good idea too.
+ See `[PATCH v10 00/10] drm/hdcp: Pull HDCP auth/exchange/check into helpers <https://lore.kernel.org/dri-devel/20230419154321.1993419-1-markyacoub@google.com/>`_
+
+The `vc4` driver is a good example for all this.
+
+Contact: Maxime Ripard <mripard@kernel.org>
+
+Level: Intermediate
+
Better Testing
==============
Add unit tests using the Kernel Unit Testing (KUnit) framework
We recently added some infrastructure to deal with HDMI but we're still lacking a couple of things. Add a TODO entry with the remaining items. Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Maxime Ripard <mripard@kernel.org> --- Changes from v1: - Add sound and HDCP --- Documentation/gpu/todo.rst | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+)