I noticed that commit 8a3b4c17f863 ("drm/msm/dp: employ bridge mechanism for display enable and disable") conflicts with the panel-edp (panel bridge) support. Both bridges will try to attach directly to the drm encoder itself without forming a proper bridge chain.
Initially I started writing lengthy letter describing what is broken and how it should be fixed. Then at some point I stopped and quickly coded this RFC (which is compile-tested only).
Comments and tests (on both DP and eDP setups) are more than welcome.
Changes since RFC v1: - Expanded commit messages to reference possible setups Added details about possible bridges, usage, etc - Changed handling of errors for devm_drm_of_get_bridge(). Made the -ENODEV fatal for the eDP connectors only, all other errors should be fatal for both eDP and DP.
Dmitry Baryshkov (5): drm/msm/dp: fix panel bridge attachment drm/msm/dp: support attaching bridges to the DP encoder drm/msm/dp: support finding next bridge even for DP interfaces drm/msm/dp: replace dp_connector with drm_bridge_connector drm/msm/dp: remove extra wrappers and public functions
drivers/gpu/drm/msm/dp/dp_display.c | 76 +++++++----- drivers/gpu/drm/msm/dp/dp_display.h | 3 +- drivers/gpu/drm/msm/dp/dp_drm.c | 186 +++++++--------------------- drivers/gpu/drm/msm/dp/dp_drm.h | 22 +++- drivers/gpu/drm/msm/dp/dp_parser.c | 38 +++--- drivers/gpu/drm/msm/dp/dp_parser.h | 2 +- drivers/gpu/drm/msm/msm_drv.h | 31 ----- 7 files changed, 137 insertions(+), 221 deletions(-)
base-commit: 6aa89ae1fb049614b7e03e24485bbfb96754a02b prerequisite-patch-id: 89e012b5b7da1a90cc243cc4c305400a4fafdf0b prerequisite-patch-id: 0de618d54d5fea5b48c2b540c8731a1a7e2f4c15 prerequisite-patch-id: a9b1a27e9800626cc0ebc73291d65c2790670583 prerequisite-patch-id: 2067135baa2995fbcbfd6793b61e39027e6b7516 prerequisite-patch-id: 0591114f3c59f9376ba25e77e7a48daf90cf7aa6 prerequisite-patch-id: 684cf6c7a177cb7c6c9d83a859eec0acef5c132c prerequisite-patch-id: 083313bc9b19fcf7fed78f63a3cb0752f54cec4f prerequisite-patch-id: 6e46e24cd7471ba38679b3d6f99a1132fa1154b3