Re: [RFC PATCH 1/8] dt-bindings: drm/panel-simple: Introduce generic eDP panels

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On Thu, Jul 22, 2021 at 05:21:39PM -0700, Douglas Anderson wrote:
> eDP panels generally contain almost everything needed to control them
> in their EDID. This comes from their DP heritage were a computer needs
> to be able to properly control pretty much any DP display that's
> plugged into it.
> 
> The one big issue with eDP panels and the reason that we need a panel
> driver for them is that the power sequencing can be different per
> panel.
> 
> While it is true that eDP panel sequencing can be arbitrarily complex,
> in practice it turns out that many eDP panels are compatible with just
> some slightly different delays. See the contents of the bindings file
> introduced in this patch for some details.
> 
> The fact that eDP panels are 99% probable and that the power
> sequencing (especially power up) can be compatible between many panels
> means that there's a constant desire to plug multiple different panels
> into the same board. This could be for second sourcing purposes or to
> support multiple SKUs (maybe a 11" and a 13", for instance).
> 
> As discussed [1], it should be OK to support this by adding two
> properties to the device tree to specify the delays needed for
> powering up the panel the first time. We'll create a new "edp-panel"
> bindings file and define the two delays that might need to be
> specified. NOTE: in the vast majority of the cases (HPD is hooked up
> and isn't glitchy or is debounced) even these delays aren't needed.
> 
> In order to help ease the transition, we'll support old "panel-simple"
> panels as "fallback" panels. In this case "edp-panel" should be
> specified first but if there are problems or a panel is unknown we can
> fallback to controlling panels like we used to.
> 
> [1] https://lore.kernel.org/r/CAD=FV=VZYOMPwQZzWdhJGh5cjJWw_EcM-wQVEivZ-bdGXjPrEQ@xxxxxxxxxxxxxx
> 
> Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
> ---
> As usual with anything remotely complicated with yaml bindings, I
> mostly messed around with these until it seemed to validate
> correctly. Hopefully this is somewhat the way to do things. If folks
> would prefer something different (maybe just having one bindings file
> for edp-panel and simple-panel) I can change it up.
> 
>  .../bindings/display/panel/panel-edp.yaml     | 196 ++++++
>  .../bindings/display/panel/panel-simple.yaml  | 559 +++++++++---------
>  2 files changed, 479 insertions(+), 276 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/display/panel/panel-edp.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/panel-edp.yaml b/Documentation/devicetree/bindings/display/panel/panel-edp.yaml
> new file mode 100644
> index 000000000000..7a9dcf270646
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/panel/panel-edp.yaml
> @@ -0,0 +1,196 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/panel/panel-edp.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Probable (via DP AUX / EDID) eDP Panels with simple poweron sequences
> +
> +maintainers:
> +  - Douglas Anderson <dianders@xxxxxxxxxxxx>
> +
> +description: |
> +  This binding file can be used to indicate that an eDP panel is connected
> +  to a Embedded DisplayPort AUX bus (see display/dp-aux-bus.yaml) without
> +  actually specifying exactly what panel is connected. This is useful for
> +  the case that more than one different panel could be connected to the
> +  board, either for second-sourcing purposes or to support multiple SKUs
> +  with different LCDs that hook up to a common board.
> +
> +  As per above, a requirement for using this binding is that the panel is
> +  represented under the DP AUX bus. This means that we can use any
> +  information provided by the DP AUX bus (including the EDID) to identify
> +  the panel. We can use this to identify display size, resolution, and
> +  timings among other things.
> +
> +  One piece of information about eDP panels that is typically _not_
> +  provided anywhere on the DP AUX bus is the power sequencing timings.
> +  This is the reason why, historically, we've always had to explicitly
> +  list eDP panels. We solve that here with two tricks. The "worst case"
> +  power on timings for any panels expected to be connected to a board are
> +  specified in these bindings. Once we've powered on, it's expected that
> +  the operating system will lookup the panel in a table (based on EDID
> +  information) to figure out other power sequencing timings.
> +
> +  eDP panels in general can have fairly arbitrary power sequencing
> +  requirements. However, even though it's arbitrary in general, the
> +  vast majority of panel datasheets have a power sequence diagram that
> +  looks the exactly the same as every other panel. Each panel datasheet
> +  cares about different timings in this diagram but the fact that the
> +  diagram is so similar means we can come up with a single driver to
> +  handle it.
> +
> +  These diagrams all look roughly like this, sometimes labeled with
> +  slightly different numbers / lines but all pretty much the same sequence:
> +
> +                __________________________________________________
> +  Vdd       ___/:                                                :\____       /
> +          _/    :                                                :     \_____/
> +           :<T1>:<T2>:                                 :<--T10-->:<T11>:<T12>:
> +                :    +-----------------------+---------+---------+
> +  eDP     -----------+ Black video           | Src vid | Blk vid +
> +  Display       :    +-----------------------+---------+---------+
> +                :     _______________________:_________:_________:
> +  HPD           :<T3>|                       :         :         |
> +          ___________|                       :         :         |_____________
> +                     :                       :         :         :
> +  Sink               +-----------------------:---------:---------+
> +  AUX CH  -----------+ AUX Ch operational    :         :         +-------------
> +                     +-----------------------:---------:---------+
> +                     :                       :         :         :
> +                     :<T4>:             :<T7>:         :         :
> +  Src main                +------+------+--------------+---------+
> +  lnk data----------------+LnkTrn| Idle |Valid vid data| Idle/off+-------------
> +                          +------+------+--------------+---------+
> +                          : <T5> :<-T6->:<-T8->:       :
> +                                               :__:<T9>:
> +  LED_EN                                       |  |
> +          _____________________________________|  |____________________________
> +                                               :  :
> +                                     __________:__:_
> +  PWM                               |          :  : |
> +          __________________________|          :  : |__________________________
> +                                    :          :  : :
> +                       _____________:__________:__:_:______
> +  Bklight         ____/:            :          :  : :     :\____
> +  power   _______/     :<---T13---->:          :  : :<T16>:     \______________
> +  (Vbl)          :<T17>:<---------T14--------->:  :<-T15->:<T18>:
> +
> +  The above looks fairly complex but, as per above, each panel only cares
> +  about a subset of those timings.
> +
> +allOf:
> +  - $ref: panel-common.yaml#
> +
> +properties:
> +  compatible:
> +    items:
> +      - const: edp-panel
> +
> +    # You can list a panel from panel-simple.yaml as a fallback which will

edp-panel should be the fallback. If you want to define that in schema, 
then you need to add another case under a oneOf:

items:
  - {}
  - const: edp-panel

> +    # be used for power sequence timings in case the operating system can't
> +    # auto-detect using the AUX bus.
> +    additionalItems: true
> +    minItems: 1
> +    maxItems: 2

and then drop all this.

> +
> +  hpd-reliable-delay:

standard unit suffix needed

> +    $ref: /schemas/types.yaml#/definitions/uint32

Then you can drop this.

> +    description:
> +      A fixed amount of time (in milliseconds) that must be waited after
> +      powering on the panel's power-supply before the HPD signal is a reliable
> +      way to know when the AUX channel is ready. This is useful for panels
> +      that glitch the HPD at the start of power-on. This value is not needed
> +      if HPD is always reliable for all panels that might be connected.
> +
> +  hpd-absent-delay:
> +    $ref: /schemas/types.yaml#/definitions/uint32

Same here.

> +    description:
> +      The panel specifies that HPD will be asserted this many milliseconds
> +      from power on (timing T3 in the diagram above). If we have no way to
> +      measure HPD then a fixed delay of this many milliseconds can be used.
> +      This can also be used as a timeout when waiting for HPD. Does not
> +      include the hpd-reliable-delay, so if hpd-reliable-delay was 80 ms
> +      and hpd-absent-delay was 200 ms then we'd do a fixed 80 ms delay and
> +      then we know HPD would assert in the next 120 ms. This value is not
> +      needed if HPD hooked up, either through a GPIO in the panel node or
> +      hooked up directly to the eDP controller.
> +
> +  backlight: true
> +  enable-gpios: true
> +  port: true
> +  power-supply: true
> +  no-hpd: true
> +  hpd-gpios: true
> +
> +additionalProperties: false
> +
> +required:
> +  - compatible
> +  - power-supply
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/qcom,rpmh.h>
> +    #include <dt-bindings/gpio/gpio.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    i2c {
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +
> +      bridge@2d {
> +        compatible = "ti,sn65dsi86";
> +        reg = <0x2d>;
> +
> +        interrupt-parent = <&tlmm>;
> +        interrupts = <10 IRQ_TYPE_LEVEL_HIGH>;
> +
> +        enable-gpios = <&tlmm 102 GPIO_ACTIVE_HIGH>;
> +
> +        vpll-supply = <&src_pp1800_s4a>;
> +        vccio-supply = <&src_pp1800_s4a>;
> +        vcca-supply = <&src_pp1200_l2a>;
> +        vcc-supply = <&src_pp1200_l2a>;
> +
> +        clocks = <&rpmhcc RPMH_LN_BB_CLK2>;
> +        clock-names = "refclk";
> +
> +        no-hpd;
> +
> +        ports {
> +          #address-cells = <1>;
> +          #size-cells = <0>;
> +
> +          port@0 {
> +            reg = <0>;
> +            endpoint {
> +              remote-endpoint = <&dsi0_out>;
> +            };
> +          };
> +
> +          port@1 {
> +            reg = <1>;
> +            sn65dsi86_out: endpoint {
> +              remote-endpoint = <&panel_in_edp>;
> +            };
> +          };
> +        };
> +
> +        aux-bus {
> +          panel {
> +            compatible = "edp-panel", "boe,nv133fhm-n62";
> +            power-supply = <&pp3300_dx_edp>;
> +            backlight = <&backlight>;
> +            hpd-gpios = <&sn65dsi86_bridge 2 GPIO_ACTIVE_HIGH>;
> +            hpd-reliable-delay = <15>;
> +
> +            port {
> +              panel_in_edp: endpoint {
> +                remote-endpoint = <&sn65dsi86_out>;
> +              };
> +            };
> +          };
> +        };
> +      };
> +    };
> diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> index 3624363938dd..a3ebd2bdbe1e 100644
> --- a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> +++ b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
> @@ -23,284 +23,287 @@ allOf:
>    - $ref: panel-common.yaml#
>  
>  properties:
> -
>    compatible:
> -    enum:
> -    # compatible must be listed in alphabetical order, ordered by compatible.
> -    # The description in the comment is mandatory for each compatible.
> +    anyOf:
> +      - minItems: 1
> +      - items:
> +          - const: edp-panel
> +          - enum:

This is odd... I'm somewhat surprised it works with the dtschema fixups 
and 'select' generation code.

> +            # compatible must be listed in alphabetical order, ordered by compatible.
> +            # The description in the comment is mandatory for each compatible.
>  
> -        # Ampire AM-1280800N3TZQW-T00H 10.1" WQVGA TFT LCD panel
> -      - ampire,am-1280800n3tzqw-t00h
> -        # Ampire AM-480272H3TMQW-T01H 4.3" WQVGA TFT LCD panel
> -      - ampire,am-480272h3tmqw-t01h
> -        # Ampire AM-800480R3TMQW-A1H 7.0" WVGA TFT LCD panel
> -      - ampire,am800480r3tmqwa1h
> -        # AU Optronics Corporation 10.1" WSVGA TFT LCD panel
> -      - auo,b101aw03
> -        # AU Optronics Corporation 10.1" WSVGA TFT LCD panel
> -      - auo,b101ean01
> -        # AU Optronics Corporation 10.1" WXGA TFT LCD panel
> -      - auo,b101xtn01
> -        # AUO B116XAK01 eDP TFT LCD panel
> -      - auo,b116xa01
> -        # AU Optronics Corporation 11.6" HD (1366x768) color TFT-LCD panel
> -      - auo,b116xw03
> -        # AU Optronics Corporation 13.3" FHD (1920x1080) color TFT-LCD panel
> -      - auo,b133htn01
> -        # AU Optronics Corporation 13.3" WXGA (1366x768) TFT LCD panel
> -      - auo,b133xtn01
> -        # AU Optronics Corporation 7.0" FHD (800 x 480) TFT LCD panel
> -      - auo,g070vvn01
> -        # AU Optronics Corporation 10.1" (1280x800) color TFT LCD panel
> -      - auo,g101evn010
> -        # AU Optronics Corporation 10.4" (800x600) color TFT LCD panel
> -      - auo,g104sn02
> -        # AU Optronics Corporation 12.1" (1280x800) TFT LCD panel
> -      - auo,g121ean01
> -        # AU Optronics Corporation 13.3" FHD (1920x1080) TFT LCD panel
> -      - auo,g133han01
> -        # AU Optronics Corporation 15.6" (1366x768) TFT LCD panel
> -      - auo,g156xtn01
> -        # AU Optronics Corporation 18.5" FHD (1920x1080) TFT LCD panel
> -      - auo,g185han01
> -        # AU Optronics Corporation 19.0" (1280x1024) TFT LCD panel
> -      - auo,g190ean01
> -        # AU Optronics Corporation 31.5" FHD (1920x1080) TFT LCD panel
> -      - auo,p320hvn03
> -        # AU Optronics Corporation 21.5" FHD (1920x1080) color TFT LCD panel
> -      - auo,t215hvn01
> -        # Shanghai AVIC Optoelectronics 7" 1024x600 color TFT-LCD panel
> -      - avic,tm070ddh03
> -        # BOE HV070WSA-100 7.01" WSVGA TFT LCD panel
> -      - boe,hv070wsa-100
> -        # BOE OPTOELECTRONICS TECHNOLOGY 10.1" WXGA TFT LCD panel
> -      - boe,nv101wxmn51
> -        # BOE NV133FHM-N61 13.3" FHD (1920x1080) TFT LCD Panel
> -      - boe,nv110wtm-n61
> -        # BOE NV110WTM-N61 11.0" 2160x1440 TFT LCD Panel
> -      - boe,nv133fhm-n61
> -        # BOE NV133FHM-N62 13.3" FHD (1920x1080) TFT LCD Panel
> -      - boe,nv133fhm-n62
> -        # BOE NV140FHM-N49 14.0" FHD a-Si FT panel
> -      - boe,nv140fhmn49
> -        # CDTech(H.K.) Electronics Limited 4.3" 480x272 color TFT-LCD panel
> -      - cdtech,s043wq26h-ct7
> -        # CDTech(H.K.) Electronics Limited 7" WSVGA (1024x600) TFT LCD Panel
> -      - cdtech,s070pws19hp-fc21
> -        # CDTech(H.K.) Electronics Limited 7" WVGA (800x480) TFT LCD Panel
> -      - cdtech,s070swv29hg-dc44
> -        # CDTech(H.K.) Electronics Limited 7" 800x480 color TFT-LCD panel
> -      - cdtech,s070wv95-ct16
> -        # Chefree CH101OLHLWH-002 10.1" (1280x800) color TFT LCD panel
> -      - chefree,ch101olhlwh-002
> -        # Chunghwa Picture Tubes Ltd. 7" WXGA TFT LCD panel
> -      - chunghwa,claa070wp03xg
> -        # Chunghwa Picture Tubes Ltd. 10.1" WXGA TFT LCD panel
> -      - chunghwa,claa101wa01a
> -        # Chunghwa Picture Tubes Ltd. 10.1" WXGA TFT LCD panel
> -      - chunghwa,claa101wb01
> -        # Chunghwa Picture Tubes Ltd. 10.1" WXGA TFT LCD panel
> -      - chunghwa,claa101wb03
> -        # DataImage, Inc. 7" WVGA (800x480) TFT LCD panel with 24-bit parallel interface.
> -      - dataimage,scf0700c48ggu18
> -        # DLC Display Co. DLC1010GIG 10.1" WXGA TFT LCD Panel
> -      - dlc,dlc1010gig
> -        # Emerging Display Technology Corp. 3.5" QVGA TFT LCD panel
> -      - edt,et035012dm6
> -        # Emerging Display Technology Corp. 5.7" VGA TFT LCD panel
> -      - edt,et057090dhu
> -      - edt,et070080dh6
> -        # Emerging Display Technology Corp. 3.5" WVGA TFT LCD panel with
> -        # capacitive multitouch
> -      - edt,etm0350g0dh6
> -        # Emerging Display Technology Corp. 480x272 TFT Display with capacitive touch
> -      - edt,etm043080dh6gp
> -        # Emerging Display Technology Corp. 480x272 TFT Display
> -      - edt,etm0430g0dh6
> -        # Emerging Display Technology Corp. WVGA TFT Display with capacitive touch
> -        # Same as ETM0700G0DH6 but with inverted pixel clock.
> -      - edt,etm070080bdh6
> -        # Emerging Display Technology Corp. WVGA TFT Display with capacitive touch
> -        # Same timings as the ETM0700G0DH6, but with resistive touch.
> -      - edt,etm070080dh6
> -        # Emerging Display Technology Corp. WVGA TFT Display with capacitive touch
> -        # Same display as the ETM0700G0BDH6, but with changed hardware for the
> -        # backlight and the touch interface.
> -      - edt,etm070080edh6
> -      - edt,etm0700g0bdh6
> -        # Emerging Display Technology Corp. WVGA TFT Display with capacitive touch
> -      - edt,etm0700g0dh6
> -      - edt,etm0700g0edh6
> -        # Emerging Display Technology Corp. 5.7" VGA TFT LCD panel with
> -        # capacitive touch
> -      - edt,etmv570g2dhu
> -        # Evervision Electronics Co. Ltd. VGG804821 5.0" WVGA TFT LCD Panel
> -      - evervision,vgg804821
> -        # Foxlink Group 5" WVGA TFT LCD panel
> -      - foxlink,fl500wvr00-a0t
> -        # Frida FRD350H54004 3.5" QVGA TFT LCD panel
> -      - frida,frd350h54004
> -        # FriendlyELEC HD702E 800x1280 LCD panel
> -      - friendlyarm,hd702e
> -        # GiantPlus GPG48273QS5 4.3" (480x272) WQVGA TFT LCD panel
> -      - giantplus,gpg48273qs5
> -        # GiantPlus GPM940B0 3.0" QVGA TFT LCD panel
> -      - giantplus,gpm940b0
> -        # HannStar Display Corp. HSD070PWW1 7.0" WXGA TFT LCD panel
> -      - hannstar,hsd070pww1
> -        # HannStar Display Corp. HSD100PXN1 10.1" XGA LVDS panel
> -      - hannstar,hsd100pxn1
> -        # Hitachi Ltd. Corporation 9" WVGA (800x480) TFT LCD panel
> -      - hit,tx23d38vm0caa
> -        # InfoVision Optoelectronics M133NWF4 R0 13.3" FHD (1920x1080) TFT LCD panel
> -      - ivo,m133nwf4-r0
> -        # Innolux AT043TN24 4.3" WQVGA TFT LCD panel
> -      - innolux,at043tn24
> -        # Innolux AT070TN92 7.0" WQVGA TFT LCD panel
> -      - innolux,at070tn92
> -        # Innolux G070Y2-L01 7" WVGA (800x480) TFT LCD panel
> -      - innolux,g070y2-l01
> -        # Innolux Corporation 10.1" G101ICE-L01 WXGA (1280x800) LVDS panel
> -      - innolux,g101ice-l01
> -        # Innolux Corporation 12.1" WXGA (1280x800) TFT LCD panel
> -      - innolux,g121i1-l01
> -        # Innolux Corporation 12.1" G121X1-L03 XGA (1024x768) TFT LCD panel
> -      - innolux,g121x1-l03
> -        # Innolux Corporation 11.6" WXGA (1366x768) TFT LCD panel
> -      - innolux,n116bca-ea1
> -        # Innolux Corporation 11.6" WXGA (1366x768) TFT LCD panel
> -      - innolux,n116bge
> -        # InnoLux 13.3" FHD (1920x1080) eDP TFT LCD panel
> -      - innolux,n125hce-gn1
> -        # InnoLux 15.6" WXGA TFT LCD panel
> -      - innolux,n156bge-l21
> -        # Innolux Corporation 7.0" WSVGA (1024x600) TFT LCD panel
> -      - innolux,zj070na-01p
> -        # King & Display KD116N21-30NV-A010 eDP TFT LCD panel
> -      - kingdisplay,kd116n21-30nv-a010
> -        # Kaohsiung Opto-Electronics Inc. 5.7" QVGA (320 x 240) TFT LCD panel
> -      - koe,tx14d24vm1bpa
> -        # Kaohsiung Opto-Electronics Inc. 10.1" WUXGA (1920 x 1200) LVDS TFT LCD panel
> -      - koe,tx26d202vm0bwa
> -        # Kaohsiung Opto-Electronics. TX31D200VM0BAA 12.3" HSXGA LVDS panel
> -      - koe,tx31d200vm0baa
> -        # Kyocera Corporation 7" WVGA (800x480) transmissive color TFT
> -      - kyo,tcg070wvlq
> -        # Kyocera Corporation 12.1" XGA (1024x768) TFT LCD panel
> -      - kyo,tcg121xglp
> -        # LeMaker BL035-RGB-002 3.5" QVGA TFT LCD panel
> -      - lemaker,bl035-rgb-002
> -        # LG 7" (800x480 pixels) TFT LCD panel
> -      - lg,lb070wv8
> -        # LG Corporation 5" HD TFT LCD panel
> -      - lg,lh500wx1-sd03
> -        # LG LP079QX1-SP0V 7.9" (1536x2048 pixels) TFT LCD panel
> -      - lg,lp079qx1-sp0v
> -        # LG 9.7" (2048x1536 pixels) TFT LCD panel
> -      - lg,lp097qx1-spa1
> -        # LG 12.0" (1920x1280 pixels) TFT LCD panel
> -      - lg,lp120up1
> -        # LG 12.9" (2560x1700 pixels) TFT LCD panel
> -      - lg,lp129qe
> -        # Logic Technologies LT161010-2NHC 7" WVGA TFT Cap Touch Module
> -      - logictechno,lt161010-2nhc
> -        # Logic Technologies LT161010-2NHR 7" WVGA TFT Resistive Touch Module
> -      - logictechno,lt161010-2nhr
> -        # Logic Technologies LT170410-2WHC 10.1" 1280x800 IPS TFT Cap Touch Mod.
> -      - logictechno,lt170410-2whc
> -        # Mitsubishi "AA070MC01 7.0" WVGA TFT LCD panel
> -      - mitsubishi,aa070mc01-ca1
> -        # NEC LCD Technologies, Ltd. 12.1" WXGA (1280x800) LVDS TFT LCD panel
> -      - nec,nl12880bc20-05
> -        # NEC LCD Technologies,Ltd. WQVGA TFT LCD panel
> -      - nec,nl4827hc19-05b
> -        # Netron-DY E231732 7.0" WSVGA TFT LCD panel
> -      - netron-dy,e231732
> -        # NewEast Optoelectronics CO., LTD WJFH116008A eDP TFT LCD panel
> -      - neweast,wjfh116008a
> -        # Newhaven Display International 480 x 272 TFT LCD panel
> -      - newhaven,nhd-4.3-480272ef-atxl
> -        # NLT Technologies, Ltd. 15.6" FHD (1920x1080) LVDS TFT LCD panel
> -      - nlt,nl192108ac18-02d
> -        # New Vision Display 7.0" 800 RGB x 480 TFT LCD panel
> -      - nvd,9128
> -        # OKAYA Electric America, Inc. RS800480T-7X0GP 7" WVGA LCD panel
> -      - okaya,rs800480t-7x0gp
> -        # Olimex 4.3" TFT LCD panel
> -      - olimex,lcd-olinuxino-43-ts
> -        # On Tat Industrial Company 7" DPI TFT panel.
> -      - ontat,yx700wv03
> -        # OrtusTech COM37H3M05DTC Blanview 3.7" VGA portrait TFT-LCD panel
> -      - ortustech,com37h3m05dtc
> -        # OrtusTech COM37H3M99DTC Blanview 3.7" VGA portrait TFT-LCD panel
> -      - ortustech,com37h3m99dtc
> -        # OrtusTech COM43H4M85ULC Blanview 3.7" TFT-LCD panel
> -      - ortustech,com43h4m85ulc
> -        # OSD Displays OSD070T1718-19TS 7" WVGA TFT LCD panel
> -      - osddisplays,osd070t1718-19ts
> -        # One Stop Displays OSD101T2045-53TS 10.1" 1920x1200 panel
> -      - osddisplays,osd101t2045-53ts
> -        # POWERTIP PH800480T013-IDF2 7.0" WVGA TFT LCD panel
> -      - powertip,ph800480t013-idf02
> -        # QiaoDian XianShi Corporation 4"3 TFT LCD panel
> -      - qiaodian,qd43003c0-40
> -        # Rocktech Displays Ltd. RK101II01D-CT 10.1" TFT 1280x800
> -      - rocktech,rk101ii01d-ct
> -        # Rocktech Display Ltd. RK070ER9427 800(RGB)x480 TFT LCD panel
> -      - rocktech,rk070er9427
> -        # Samsung 13.3" FHD (1920x1080 pixels) eDP AMOLED panel
> -      - samsung,atna33xc20
> -        # Samsung 12.2" (2560x1600 pixels) TFT LCD panel
> -      - samsung,lsn122dl01-c01
> -        # Samsung Electronics 10.1" WSVGA TFT LCD panel
> -      - samsung,ltn101nt05
> -        # Samsung Electronics 14" WXGA (1366x768) TFT LCD panel
> -      - samsung,ltn140at29-301
> -        # Satoz SAT050AT40H12R2 5.0" WVGA TFT LCD panel
> -      - satoz,sat050at40h12r2
> -        # Sharp LQ035Q7DB03 3.5" QVGA TFT LCD panel
> -      - sharp,lq035q7db03
> -        # Sharp LQ070Y3DG3B 7.0" WVGA landscape TFT LCD panel
> -      - sharp,lq070y3dg3b
> -        # Sharp Display Corp. LQ101K1LY04 10.07" WXGA TFT LCD panel
> -      - sharp,lq101k1ly04
> -        # Sharp 12.3" (2400x1600 pixels) TFT LCD panel
> -      - sharp,lq123p1jx31
> -        # Sharp LS020B1DD01D 2.0" HQVGA TFT LCD panel
> -      - sharp,ls020b1dd01d
> -        # Shelly SCA07010-BFN-LNN 7.0" WVGA TFT LCD panel
> -      - shelly,sca07010-bfn-lnn
> -        # Starry KR070PE2T 7" WVGA TFT LCD panel
> -      - starry,kr070pe2t
> -        # Starry 12.2" (1920x1200 pixels) TFT LCD panel
> -      - starry,kr122ea0sra
> -        # Tianma Micro-electronics TM070JDHG30 7.0" WXGA TFT LCD panel
> -      - tianma,tm070jdhg30
> -        # Tianma Micro-electronics TM070JVHG33 7.0" WXGA TFT LCD panel
> -      - tianma,tm070jvhg33
> -        # Tianma Micro-electronics TM070RVHG71 7.0" WXGA TFT LCD panel
> -      - tianma,tm070rvhg71
> -        # Toshiba 8.9" WXGA (1280x768) TFT LCD panel
> -      - toshiba,lt089ac29000
> -        # TPK U.S.A. LLC Fusion 7" 800 x 480 (WVGA) LCD panel with capacitive touch
> -      - tpk,f07a-0102
> -        # TPK U.S.A. LLC Fusion 10.1" 1024 x 600 (WSVGA) LCD panel with capacitive touch
> -      - tpk,f10a-0102
> -        # United Radiant Technology UMSH-8596MD-xT 7.0" WVGA TFT LCD panel
> -        # Supported are LVDS versions (-11T, -19T) and parallel ones
> -        # (-T, -1T, -7T, -20T).
> -      - urt,umsh-8596md-t
> -      - urt,umsh-8596md-1t
> -      - urt,umsh-8596md-7t
> -      - urt,umsh-8596md-11t
> -      - urt,umsh-8596md-19t
> -      - urt,umsh-8596md-20t
> -        # VXT 800x480 color TFT LCD panel
> -      - vxt,vl050-8048nt-c01
> -        # Winstar Display Corporation 3.5" QVGA (320x240) TFT LCD panel
> -      - winstar,wf35ltiacd
> -        # Yes Optoelectronics YTC700TLAG-05-201C 7" TFT LCD panel
> -      - yes-optoelectronics,ytc700tlag-05-201c
> +                # Ampire AM-1280800N3TZQW-T00H 10.1" WQVGA TFT LCD panel
> +              - ampire,am-1280800n3tzqw-t00h
> +                # Ampire AM-480272H3TMQW-T01H 4.3" WQVGA TFT LCD panel
> +              - ampire,am-480272h3tmqw-t01h
> +                # Ampire AM-800480R3TMQW-A1H 7.0" WVGA TFT LCD panel
> +              - ampire,am800480r3tmqwa1h
> +                # AU Optronics Corporation 10.1" WSVGA TFT LCD panel
> +              - auo,b101aw03
> +                # AU Optronics Corporation 10.1" WSVGA TFT LCD panel
> +              - auo,b101ean01
> +                # AU Optronics Corporation 10.1" WXGA TFT LCD panel
> +              - auo,b101xtn01
> +                # AUO B116XAK01 eDP TFT LCD panel
> +              - auo,b116xa01
> +                # AU Optronics Corporation 11.6" HD (1366x768) color TFT-LCD panel
> +              - auo,b116xw03
> +                # AU Optronics Corporation 13.3" FHD (1920x1080) color TFT-LCD panel
> +              - auo,b133htn01
> +                # AU Optronics Corporation 13.3" WXGA (1366x768) TFT LCD panel
> +              - auo,b133xtn01
> +                # AU Optronics Corporation 7.0" FHD (800 x 480) TFT LCD panel
> +              - auo,g070vvn01
> +                # AU Optronics Corporation 10.1" (1280x800) color TFT LCD panel
> +              - auo,g101evn010
> +                # AU Optronics Corporation 10.4" (800x600) color TFT LCD panel
> +              - auo,g104sn02
> +                # AU Optronics Corporation 12.1" (1280x800) TFT LCD panel
> +              - auo,g121ean01
> +                # AU Optronics Corporation 13.3" FHD (1920x1080) TFT LCD panel
> +              - auo,g133han01
> +                # AU Optronics Corporation 15.6" (1366x768) TFT LCD panel
> +              - auo,g156xtn01
> +                # AU Optronics Corporation 18.5" FHD (1920x1080) TFT LCD panel
> +              - auo,g185han01
> +                # AU Optronics Corporation 19.0" (1280x1024) TFT LCD panel
> +              - auo,g190ean01
> +                # AU Optronics Corporation 31.5" FHD (1920x1080) TFT LCD panel
> +              - auo,p320hvn03
> +                # AU Optronics Corporation 21.5" FHD (1920x1080) color TFT LCD panel
> +              - auo,t215hvn01
> +                # Shanghai AVIC Optoelectronics 7" 1024x600 color TFT-LCD panel
> +              - avic,tm070ddh03
> +                # BOE HV070WSA-100 7.01" WSVGA TFT LCD panel
> +              - boe,hv070wsa-100
> +                # BOE OPTOELECTRONICS TECHNOLOGY 10.1" WXGA TFT LCD panel
> +              - boe,nv101wxmn51
> +                # BOE NV133FHM-N61 13.3" FHD (1920x1080) TFT LCD Panel
> +              - boe,nv110wtm-n61
> +                # BOE NV110WTM-N61 11.0" 2160x1440 TFT LCD Panel
> +              - boe,nv133fhm-n61
> +                # BOE NV133FHM-N62 13.3" FHD (1920x1080) TFT LCD Panel
> +              - boe,nv133fhm-n62
> +                # BOE NV140FHM-N49 14.0" FHD a-Si FT panel
> +              - boe,nv140fhmn49
> +                # CDTech(H.K.) Electronics Limited 4.3" 480x272 color TFT-LCD panel
> +              - cdtech,s043wq26h-ct7
> +                # CDTech(H.K.) Electronics Limited 7" WSVGA (1024x600) TFT LCD Panel
> +              - cdtech,s070pws19hp-fc21
> +                # CDTech(H.K.) Electronics Limited 7" WVGA (800x480) TFT LCD Panel
> +              - cdtech,s070swv29hg-dc44
> +                # CDTech(H.K.) Electronics Limited 7" 800x480 color TFT-LCD panel
> +              - cdtech,s070wv95-ct16
> +                # Chefree CH101OLHLWH-002 10.1" (1280x800) color TFT LCD panel
> +              - chefree,ch101olhlwh-002
> +                # Chunghwa Picture Tubes Ltd. 7" WXGA TFT LCD panel
> +              - chunghwa,claa070wp03xg
> +                # Chunghwa Picture Tubes Ltd. 10.1" WXGA TFT LCD panel
> +              - chunghwa,claa101wa01a
> +                # Chunghwa Picture Tubes Ltd. 10.1" WXGA TFT LCD panel
> +              - chunghwa,claa101wb01
> +                # Chunghwa Picture Tubes Ltd. 10.1" WXGA TFT LCD panel
> +              - chunghwa,claa101wb03
> +                # DataImage, Inc. 7" WVGA (800x480) TFT LCD panel with 24-bit parallel interface.
> +              - dataimage,scf0700c48ggu18
> +                # DLC Display Co. DLC1010GIG 10.1" WXGA TFT LCD Panel
> +              - dlc,dlc1010gig
> +                # Emerging Display Technology Corp. 3.5" QVGA TFT LCD panel
> +              - edt,et035012dm6
> +                # Emerging Display Technology Corp. 5.7" VGA TFT LCD panel
> +              - edt,et057090dhu
> +              - edt,et070080dh6
> +                # Emerging Display Technology Corp. 3.5" WVGA TFT LCD panel with
> +                # capacitive multitouch
> +              - edt,etm0350g0dh6
> +                # Emerging Display Technology Corp. 480x272 TFT Display with capacitive touch
> +              - edt,etm043080dh6gp
> +                # Emerging Display Technology Corp. 480x272 TFT Display
> +              - edt,etm0430g0dh6
> +                # Emerging Display Technology Corp. WVGA TFT Display with capacitive touch
> +                # Same as ETM0700G0DH6 but with inverted pixel clock.
> +              - edt,etm070080bdh6
> +                # Emerging Display Technology Corp. WVGA TFT Display with capacitive touch
> +                # Same timings as the ETM0700G0DH6, but with resistive touch.
> +              - edt,etm070080dh6
> +                # Emerging Display Technology Corp. WVGA TFT Display with capacitive touch
> +                # Same display as the ETM0700G0BDH6, but with changed hardware for the
> +                # backlight and the touch interface.
> +              - edt,etm070080edh6
> +              - edt,etm0700g0bdh6
> +                # Emerging Display Technology Corp. WVGA TFT Display with capacitive touch
> +              - edt,etm0700g0dh6
> +              - edt,etm0700g0edh6
> +                # Emerging Display Technology Corp. 5.7" VGA TFT LCD panel with
> +                # capacitive touch
> +              - edt,etmv570g2dhu
> +                # Evervision Electronics Co. Ltd. VGG804821 5.0" WVGA TFT LCD Panel
> +              - evervision,vgg804821
> +                # Foxlink Group 5" WVGA TFT LCD panel
> +              - foxlink,fl500wvr00-a0t
> +                # Frida FRD350H54004 3.5" QVGA TFT LCD panel
> +              - frida,frd350h54004
> +                # FriendlyELEC HD702E 800x1280 LCD panel
> +              - friendlyarm,hd702e
> +                # GiantPlus GPG48273QS5 4.3" (480x272) WQVGA TFT LCD panel
> +              - giantplus,gpg48273qs5
> +                # GiantPlus GPM940B0 3.0" QVGA TFT LCD panel
> +              - giantplus,gpm940b0
> +                # HannStar Display Corp. HSD070PWW1 7.0" WXGA TFT LCD panel
> +              - hannstar,hsd070pww1
> +                # HannStar Display Corp. HSD100PXN1 10.1" XGA LVDS panel
> +              - hannstar,hsd100pxn1
> +                # Hitachi Ltd. Corporation 9" WVGA (800x480) TFT LCD panel
> +              - hit,tx23d38vm0caa
> +                # InfoVision Optoelectronics M133NWF4 R0 13.3" FHD (1920x1080) TFT LCD panel
> +              - ivo,m133nwf4-r0
> +                # Innolux AT043TN24 4.3" WQVGA TFT LCD panel
> +              - innolux,at043tn24
> +                # Innolux AT070TN92 7.0" WQVGA TFT LCD panel
> +              - innolux,at070tn92
> +                # Innolux G070Y2-L01 7" WVGA (800x480) TFT LCD panel
> +              - innolux,g070y2-l01
> +                # Innolux Corporation 10.1" G101ICE-L01 WXGA (1280x800) LVDS panel
> +              - innolux,g101ice-l01
> +                # Innolux Corporation 12.1" WXGA (1280x800) TFT LCD panel
> +              - innolux,g121i1-l01
> +                # Innolux Corporation 12.1" G121X1-L03 XGA (1024x768) TFT LCD panel
> +              - innolux,g121x1-l03
> +                # Innolux Corporation 11.6" WXGA (1366x768) TFT LCD panel
> +              - innolux,n116bca-ea1
> +                # Innolux Corporation 11.6" WXGA (1366x768) TFT LCD panel
> +              - innolux,n116bge
> +                # InnoLux 13.3" FHD (1920x1080) eDP TFT LCD panel
> +              - innolux,n125hce-gn1
> +                # InnoLux 15.6" WXGA TFT LCD panel
> +              - innolux,n156bge-l21
> +                # Innolux Corporation 7.0" WSVGA (1024x600) TFT LCD panel
> +              - innolux,zj070na-01p
> +                # King & Display KD116N21-30NV-A010 eDP TFT LCD panel
> +              - kingdisplay,kd116n21-30nv-a010
> +                # Kaohsiung Opto-Electronics Inc. 5.7" QVGA (320 x 240) TFT LCD panel
> +              - koe,tx14d24vm1bpa
> +                # Kaohsiung Opto-Electronics Inc. 10.1" WUXGA (1920 x 1200) LVDS TFT LCD panel
> +              - koe,tx26d202vm0bwa
> +                # Kaohsiung Opto-Electronics. TX31D200VM0BAA 12.3" HSXGA LVDS panel
> +              - koe,tx31d200vm0baa
> +                # Kyocera Corporation 7" WVGA (800x480) transmissive color TFT
> +              - kyo,tcg070wvlq
> +                # Kyocera Corporation 12.1" XGA (1024x768) TFT LCD panel
> +              - kyo,tcg121xglp
> +                # LeMaker BL035-RGB-002 3.5" QVGA TFT LCD panel
> +              - lemaker,bl035-rgb-002
> +                # LG 7" (800x480 pixels) TFT LCD panel
> +              - lg,lb070wv8
> +                # LG Corporation 5" HD TFT LCD panel
> +              - lg,lh500wx1-sd03
> +                # LG LP079QX1-SP0V 7.9" (1536x2048 pixels) TFT LCD panel
> +              - lg,lp079qx1-sp0v
> +                # LG 9.7" (2048x1536 pixels) TFT LCD panel
> +              - lg,lp097qx1-spa1
> +                # LG 12.0" (1920x1280 pixels) TFT LCD panel
> +              - lg,lp120up1
> +                # LG 12.9" (2560x1700 pixels) TFT LCD panel
> +              - lg,lp129qe
> +                # Logic Technologies LT161010-2NHC 7" WVGA TFT Cap Touch Module
> +              - logictechno,lt161010-2nhc
> +                # Logic Technologies LT161010-2NHR 7" WVGA TFT Resistive Touch Module
> +              - logictechno,lt161010-2nhr
> +                # Logic Technologies LT170410-2WHC 10.1" 1280x800 IPS TFT Cap Touch Mod.
> +              - logictechno,lt170410-2whc
> +                # Mitsubishi "AA070MC01 7.0" WVGA TFT LCD panel
> +              - mitsubishi,aa070mc01-ca1
> +                # NEC LCD Technologies, Ltd. 12.1" WXGA (1280x800) LVDS TFT LCD panel
> +              - nec,nl12880bc20-05
> +                # NEC LCD Technologies,Ltd. WQVGA TFT LCD panel
> +              - nec,nl4827hc19-05b
> +                # Netron-DY E231732 7.0" WSVGA TFT LCD panel
> +              - netron-dy,e231732
> +                # NewEast Optoelectronics CO., LTD WJFH116008A eDP TFT LCD panel
> +              - neweast,wjfh116008a
> +                # Newhaven Display International 480 x 272 TFT LCD panel
> +              - newhaven,nhd-4.3-480272ef-atxl
> +                # NLT Technologies, Ltd. 15.6" FHD (1920x1080) LVDS TFT LCD panel
> +              - nlt,nl192108ac18-02d
> +                # New Vision Display 7.0" 800 RGB x 480 TFT LCD panel
> +              - nvd,9128
> +                # OKAYA Electric America, Inc. RS800480T-7X0GP 7" WVGA LCD panel
> +              - okaya,rs800480t-7x0gp
> +                # Olimex 4.3" TFT LCD panel
> +              - olimex,lcd-olinuxino-43-ts
> +                # On Tat Industrial Company 7" DPI TFT panel.
> +              - ontat,yx700wv03
> +                # OrtusTech COM37H3M05DTC Blanview 3.7" VGA portrait TFT-LCD panel
> +              - ortustech,com37h3m05dtc
> +                # OrtusTech COM37H3M99DTC Blanview 3.7" VGA portrait TFT-LCD panel
> +              - ortustech,com37h3m99dtc
> +                # OrtusTech COM43H4M85ULC Blanview 3.7" TFT-LCD panel
> +              - ortustech,com43h4m85ulc
> +                # OSD Displays OSD070T1718-19TS 7" WVGA TFT LCD panel
> +              - osddisplays,osd070t1718-19ts
> +                # One Stop Displays OSD101T2045-53TS 10.1" 1920x1200 panel
> +              - osddisplays,osd101t2045-53ts
> +                # POWERTIP PH800480T013-IDF2 7.0" WVGA TFT LCD panel
> +              - powertip,ph800480t013-idf02
> +                # QiaoDian XianShi Corporation 4"3 TFT LCD panel
> +              - qiaodian,qd43003c0-40
> +                # Rocktech Displays Ltd. RK101II01D-CT 10.1" TFT 1280x800
> +              - rocktech,rk101ii01d-ct
> +                # Rocktech Display Ltd. RK070ER9427 800(RGB)x480 TFT LCD panel
> +              - rocktech,rk070er9427
> +                # Samsung 13.3" FHD (1920x1080 pixels) eDP AMOLED panel
> +              - samsung,atna33xc20
> +                # Samsung 12.2" (2560x1600 pixels) TFT LCD panel
> +              - samsung,lsn122dl01-c01
> +                # Samsung Electronics 10.1" WSVGA TFT LCD panel
> +              - samsung,ltn101nt05
> +                # Samsung Electronics 14" WXGA (1366x768) TFT LCD panel
> +              - samsung,ltn140at29-301
> +                # Satoz SAT050AT40H12R2 5.0" WVGA TFT LCD panel
> +              - satoz,sat050at40h12r2
> +                # Sharp LQ035Q7DB03 3.5" QVGA TFT LCD panel
> +              - sharp,lq035q7db03
> +                # Sharp LQ070Y3DG3B 7.0" WVGA landscape TFT LCD panel
> +              - sharp,lq070y3dg3b
> +                # Sharp Display Corp. LQ101K1LY04 10.07" WXGA TFT LCD panel
> +              - sharp,lq101k1ly04
> +                # Sharp 12.3" (2400x1600 pixels) TFT LCD panel
> +              - sharp,lq123p1jx31
> +                # Sharp LS020B1DD01D 2.0" HQVGA TFT LCD panel
> +              - sharp,ls020b1dd01d
> +                # Shelly SCA07010-BFN-LNN 7.0" WVGA TFT LCD panel
> +              - shelly,sca07010-bfn-lnn
> +                # Starry KR070PE2T 7" WVGA TFT LCD panel
> +              - starry,kr070pe2t
> +                # Starry 12.2" (1920x1200 pixels) TFT LCD panel
> +              - starry,kr122ea0sra
> +                # Tianma Micro-electronics TM070JDHG30 7.0" WXGA TFT LCD panel
> +              - tianma,tm070jdhg30
> +                # Tianma Micro-electronics TM070JVHG33 7.0" WXGA TFT LCD panel
> +              - tianma,tm070jvhg33
> +                # Tianma Micro-electronics TM070RVHG71 7.0" WXGA TFT LCD panel
> +              - tianma,tm070rvhg71
> +                # Toshiba 8.9" WXGA (1280x768) TFT LCD panel
> +              - toshiba,lt089ac29000
> +                # TPK U.S.A. LLC Fusion 7" 800 x 480 (WVGA) LCD panel with capacitive touch
> +              - tpk,f07a-0102
> +                # TPK U.S.A. LLC Fusion 10.1" 1024 x 600 (WSVGA) LCD panel with capacitive touch
> +              - tpk,f10a-0102
> +                # United Radiant Technology UMSH-8596MD-xT 7.0" WVGA TFT LCD panel
> +                # Supported are LVDS versions (-11T, -19T) and parallel ones
> +                # (-T, -1T, -7T, -20T).
> +              - urt,umsh-8596md-t
> +              - urt,umsh-8596md-1t
> +              - urt,umsh-8596md-7t
> +              - urt,umsh-8596md-11t
> +              - urt,umsh-8596md-19t
> +              - urt,umsh-8596md-20t
> +                # VXT 800x480 color TFT LCD panel
> +              - vxt,vl050-8048nt-c01
> +                # Winstar Display Corporation 3.5" QVGA (320x240) TFT LCD panel
> +              - winstar,wf35ltiacd
> +                # Yes Optoelectronics YTC700TLAG-05-201C 7" TFT LCD panel
> +              - yes-optoelectronics,ytc700tlag-05-201c

Well, this is going to cause every patch to conflict...

IMO, you should move any applicable compatibles to the edp-panel schema. 
Also, I don't think you should add 'edp-panel' to them. If they can work 
better with the generic eDP driver, then that should be an internal 
kernel change without a DT change. Also, if 2 different drivers match on 
compatible, it's a roll of the dice which driver binds.

Rob



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