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[2/3] drm/todo: Create a TODO item for MIPI-DSI rework

Message ID 20240612143553.915966-2-mripard@kernel.org (mailing list archive)
State New, archived
Headers show
Series [1/3] drm/todo: Create a TODO item for additional HDMI work | expand

Commit Message

Maxime Ripard June 12, 2024, 2:35 p.m. UTC 
The MIPI-DSI infrastructure and setup we have so far is limited and
doesn't provide a good way to address some corner-cases.

Add a TODO entry to document what is needed.

Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
---
 Documentation/gpu/todo.rst | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
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Patch

diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst
index 52fd8672fb6d..94139c652663 100644
--- a/Documentation/gpu/todo.rst
+++ b/Documentation/gpu/todo.rst
@@ -633,10 +633,30 @@  long as that supports DMA. Otherwise importing can still needlessly fail.
 
 Contact: Thomas Zimmermann <tzimmermann@suse.de>, Daniel Vetter
 
 Level: Advanced
 
+Improve MIPI-DSI infrastructure
+-------------------------------
+
+The MIPI-DSI infrastructure in KMS supports MIPI-DSI devices in part
+through a dedicated bus (`drm_mipi_dsi.c`) and in part through ad-hoc
+calls in drivers, especially to handle the power state of the bus.
+
+This is an oddity as far as the device model is concerned, but is also
+an issue when multiple devices are chained (like bridges) and have
+different requirements.
+
+It would be a good idea to move all the power state handling out of KMS
+and into the bus support itself.
+
+See `[RFC PATCH 03/10] drm/mipi-dsi: add API for manual control over the DSI link power state <https://lore.kernel.org/dri-devel/20231016165355.1327217-4-dmitry.baryshkov@linaro.org/>`_
+
+Contact: Maxime Ripard <mripard@kernel.org>, Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
+
+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