Re: [RFC PATCH v2 2/5] drm/msm/dp: support attaching bridges to the DP encoder

Quoting Dmitry Baryshkov (2022-02-11 14:40:03)

Currently DP driver will allocate panel bridge for eDP panels. This supports only the following topology:

• eDP encoder ⇒ eDP panel (wrapped using panel-bridge)

Simplify this code to just check if there is any next bridge in the chain (be it a panel bridge or regular bridge). Rename panel_bridge field to next_bridge accordingly.

This allows one to use e.g. one of the following display topologies:

• eDP encoder ⇒ ptn3460 ⇒ fixed LVDS panel
• eDP encoder ⇒ ptn3460 ⇒ LVDS connector with EDID lines for panel autodetect
• eDP encoder ⇒ ptn3460 ⇒ THC63LVD1024 ⇒ DPI panel.
• eDP encoder ⇒ LT8912 ⇒ DSI panel

Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org

Reviewed-by: Stephen Boyd swboyd@chromium.org