Hi Boris, On Tue, Dec 03, 2019 at 03:15:04PM +0100, Boris Brezillon 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 v4. I think I addressed all comments I got > from Neil and Laurent (thanks for the detailed reviews BTW). Note that > this version only contains core changes. Once those changes are merged > I'll send the imx/panel/lvds-codec specific bits. I think it would make sense to fast-track patches 01 to 07 (a bit selfishly as I would have a need for them in omapdrm :-)), but starting from 08 I wonder if it wouldn't make more sense to merge them with the imx/panel/lvds-codec bits to have a user. > A more detailed changelog is provided in each patch. > > This patch series is also available here [1]. > > Thanks, > > Boris > > [1]https://github.com/bbrezillon/linux-0day/commits/drm-bridge-busfmt-v4 > > Boris Brezillon (11): > drm/bridge: Rename bridge helpers targeting a bridge chain > drm/bridge: Introduce drm_bridge_get_next_bridge() > drm: Stop accessing encoder->bridge directly > drm/bridge: Make the bridge chain a double-linked list > drm/bridge: Add the drm_for_each_bridge_in_chain() helper > drm/bridge: Add the drm_bridge_get_prev_bridge() helper > drm/bridge: Clarify the atomic enable/disable hooks semantics > 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 > > .../drm/bridge/analogix/analogix_dp_core.c | 41 +- > drivers/gpu/drm/drm_atomic.c | 39 + > drivers/gpu/drm/drm_atomic_helper.c | 53 +- > drivers/gpu/drm/drm_bridge.c | 756 +++++++++++++++--- > drivers/gpu/drm/drm_encoder.c | 15 +- > drivers/gpu/drm/drm_probe_helper.c | 4 +- > drivers/gpu/drm/exynos/exynos_drm_dsi.c | 13 +- > drivers/gpu/drm/mediatek/mtk_hdmi.c | 8 +- > drivers/gpu/drm/msm/edp/edp_bridge.c | 10 +- > drivers/gpu/drm/omapdrm/omap_drv.c | 4 +- > drivers/gpu/drm/omapdrm/omap_encoder.c | 3 +- > drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 10 +- > drivers/gpu/drm/vc4/vc4_dsi.c | 18 +- > include/drm/drm_atomic.h | 3 + > include/drm/drm_bridge.h | 404 +++++++++- > include/drm/drm_encoder.h | 7 +- > 16 files changed, 1174 insertions(+), 214 deletions(-) -- Regards, Laurent Pinchart
