drm/msm/dp: support attaching bridges to the DP encoder

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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>
Tested-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20220211224006.1797846-3-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

...

This commit is contained in:

Dmitry Baryshkov 2022-02-12 01:40:03 +03:00

parent 4d793a02c4

commit 9aa9246880

5 changed files with 21 additions and 20 deletions

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2

drivers/gpu/drm/msm/dp/dp_display.c

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2

drivers/gpu/drm/msm/dp/dp_display.h

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4

drivers/gpu/drm/msm/dp/dp_drm.c

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31

drivers/gpu/drm/msm/dp/dp_parser.c

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2

drivers/gpu/drm/msm/dp/dp_parser.h

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