(This resend is to fix some trivial conflicts due the merge window)
The PS8640 dsi-to-eDP bridge driver is using the panel bridge API, however, not all the components in the chain have been ported to the drm_bridge API. Actually, when a panel is attached the default panel's mode is used, but in some cases we can't get display up if mode getting from eDP control EDID is not chosen.
This series address that problem, first implements the .get_edid() callback in the PS8640 driver (which is not used until the conversion is done) and then, converts the Mediatek DSI driver to use the drm_bridge API.
As far as I know, we're the only users of the mediatek dsi driver in mainline, so should be safe to switch to the new chain of drm_bridge API unconditionally.
The patches has been tested on a Acer Chromebook R13 (Elm) running a Chrome OS userspace and checking that the valid EDID mode reported by the bridge is selected.
Changes in v4: - Remove double call to drm_encoder_init(). (Chun-Kuang Hu) - Cleanup the encoder in mtk_dsi_unbind(). (Chun-Kuang Hu)
Changes in v3: - Replace s/bridge/next bridge/ for comment. (Laurent Pinchart) - Add the bridge.type. (Laurent Pinchart) - Use next_bridge field to store the panel bridge. (Laurent Pinchart) - Add the bridge.type field. (Laurent Pinchart) - This patch requires https://lkml.org/lkml/2020/4/16/2080 to work properly. - Move the bridge.type line to the patch that adds drm_bridge support. (Laurent Pinchart)
Changes in v2: - Do not set connector_type for panel here. (Sam Ravnborg)
Enric Balletbo i Serra (7): drm/bridge: ps8640: Get the EDID from eDP control drm/bridge_connector: Set default status connected for eDP connectors drm/mediatek: mtk_dsi: Rename bridge to next_bridge drm/mediatek: mtk_dsi: Convert to bridge driver drm/mediatek: mtk_dsi: Use simple encoder drm/mediatek: mtk_dsi: Use the drm_panel_bridge API drm/mediatek: mtk_dsi: Create connector for bridges
drivers/gpu/drm/bridge/parade-ps8640.c | 12 ++ drivers/gpu/drm/drm_bridge_connector.c | 1 + drivers/gpu/drm/mediatek/mtk_dsi.c | 269 ++++++++----------------- 3 files changed, 97 insertions(+), 185 deletions(-)