[PATCH v6 0/4] drm: Add support for bus-format negotiation
Boris Brezillon
boris.brezillon at collabora.com
Mon Jan 6 14:37:29 UTC 2020
On Mon, 6 Jan 2020 15:34:05 +0100
Neil Armstrong <narmstrong at baylibre.com> 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 at collabora.com>
>
> .../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(-)
>
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