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#
10   - Douglas Anderson <dianders@chromium.org>
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
27   provided anywhere on the DP AUX bus is the power sequencing timings.
30   power on timings for any panels expected to be connected to a board are
31   specified in these bindings. Once we've powered on, it's expected that
32   the operating system will lookup the panel in a table (based on EDID
33   information) to figure out other power sequencing timings.
35   eDP panels in general can have somewhat arbitrary power sequencing
37   vast majority of panel datasheets have a power sequence diagram that
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:
93       A fixed amount of time that must be waited after powering on the
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:
102       from power on (timing T3 in the diagram above). If we have no way to
103       measure HPD then a fixed delay of this many milliseconds can be used.
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
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>;
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>;