display/panel/panel-edp.yaml

1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/display/panel/panel-edp.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Probeable (via DP AUX / EDID) eDP Panels with simple poweron sequences
10   - Douglas Anderson <dianders@chromium.org>
13   This binding file can be used to indicate that an eDP panel is connected
14   to a Embedded DisplayPort AUX bus (see display/dp-aux-bus.yaml) without
17   board, either for second-sourcing purposes or to support multiple SKUs
26   One piece of information about eDP panels that is typically _not_
29   list eDP panels. We solve that here with two tricks. The "worst case"
35   eDP panels in general can have somewhat arbitrary power sequencing
46   the eDP Standard.
51            :<T1>:<T2>:                                 :<--T10-->:<T11>:<T12>:
52                 :    +-----------------------+---------+---------+
53   eDP     -----------+ Black video           | Src vid | Blk vid +
54   Display       :    +-----------------------+---------+---------+
59   Sink               +-----------------------:---------:---------+
60   AUX CH  -----------+ AUX Ch operational    :         :         +-------------
61                      +-----------------------:---------:---------+
64   Src main                +------+------+--------------+---------+
65   lnk data----------------+LnkTrn| Idle |Valid vid data| Idle/off+-------------
66                           +------+------+--------------+---------+
67                           : <T5> :<-T6->:<-T8->:       :
78   power   _______/     :<---T13---->:          :  : :<T16>:     \______________
79   (Vbl)          :<T17>:<---------T14--------->:  :<-T15->:<T18>:
85   - $ref: panel-common.yaml#
89     const: edp-panel
91   hpd-reliable-delay-ms:
94       panel's power-supply before the HPD signal is a reliable way to know
96       the HPD at the start of power-on. This value is not needed if HPD is
99   hpd-absent-delay-ms:
105       include the hpd-reliable-delay, so if hpd-reliable-delay was 80 ms
106       and hpd-absent-delay was 200 ms then we'd do a fixed 80 ms delay and
109       hooked up directly to the eDP controller.
112   enable-gpios: true
114   power-supply: true
115   no-hpd: true
116   hpd-gpios: true
121   - compatible
122   - power-supply
125   - |
126     #include <dt-bindings/clock/qcom,rpmh.h>
127     #include <dt-bindings/gpio/gpio.h>
128     #include <dt-bindings/interrupt-controller/irq.h>
131       #address-cells = <1>;
132       #size-cells = <0>;
134       bridge@2d {
138         interrupt-parent = <&tlmm>;
141         enable-gpios = <&tlmm 102 GPIO_ACTIVE_HIGH>;
143         vpll-supply = <&src_pp1800_s4a>;
144         vccio-supply = <&src_pp1800_s4a>;
145         vcca-supply = <&src_pp1200_l2a>;
146         vcc-supply = <&src_pp1200_l2a>;
149         clock-names = "refclk";
151         no-hpd;
154           #address-cells = <1>;
155           #size-cells = <0>;
160               remote-endpoint = <&dsi0_out>;
167               remote-endpoint = <&panel_in_edp>;
172         aux-bus {
174             compatible = "edp-panel";
175             power-supply = <&pp3300_dx_edp>;
177             hpd-gpios = <&sn65dsi86_bridge 2 GPIO_ACTIVE_HIGH>;
178             hpd-reliable-delay-ms = <15>;
182                 remote-endpoint = <&sn65dsi86_out>;