On Mon, 6 Jan 2020 15:34:05 +0100 Neil Armstrong <narmstrong@xxxxxxxxxxxx> wrote: > This patch series aims at adding support for runtime bus-format > negotiation between all elements of the > 'encoder -> bridges -> connector/display' section of the pipeline. > > In order to support that, we need drm bridges to fully take part in the > atomic state validation process, which requires adding a > drm_bridge_state and a new drm_bridge_funcs.atomic_check() hook. > Once those basic building blocks are in place, we can add new hooks to > allow bus format negotiation (those are called just before > ->atomic_check()). The bus format selection is done at runtime by > testing all possible combinations across the whole bridge chain until > one is reported to work. > > No Major changes in this v6, I addressed the slight changed requested > by Boris from Laurent on the patch 1, and rebased on drm-misc-next. > Note that this version only contains core changes. > Once those changes are merged I'll send the imx/panel/lvds-codec specific bits. > > A more detailed changelog is provided in each patch. > > This patch series is also available here [1]. > > Thanks, > > ~Boris~ Neil > > [1] https://github.com/superna9999/linux/commits/drm-bridge-busfmt-v6 > > Boris Brezillon (4): > drm/bridge: Add a drm_bridge_state object > drm/bridge: Patch atomic hooks to take a drm_bridge_state > drm/bridge: Add an ->atomic_check() hook > drm/bridge: Add the necessary bits to support bus format negotiation This version looks good to me. Acked-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx> > > .../drm/bridge/analogix/analogix_dp_core.c | 41 +- > drivers/gpu/drm/drm_atomic.c | 39 ++ > drivers/gpu/drm/drm_atomic_helper.c | 32 +- > drivers/gpu/drm/drm_bridge.c | 527 +++++++++++++++++- > drivers/gpu/drm/rcar-du/rcar_lvds.c | 5 +- > include/drm/drm_atomic.h | 3 + > include/drm/drm_bridge.h | 275 ++++++++- > 7 files changed, 874 insertions(+), 48 deletions(-) >
