From cb028e49129f352d2f2645727ceeeacdd64761f4 Mon Sep 17 00:00:00 2001 From: Douglas Anderson Date: Thu, 25 Oct 2018 15:21:29 -0700 Subject: dt-bindings: drm/panel: simple: Add no-hpd property Some eDP panels that are designed to be always connected to a board use their HPD signal to signal that they've finished powering on and they're ready to be talked to. However, for various reasons it's possible that the HPD signal from the panel isn't actually hooked up. In the case where the HPD isn't hooked up you can look at the timing diagram on the panel datasheet and insert a delay for the maximum amount of time that the HPD might take to come up. Let's add a property in the device tree for this concept. Reviewed-by: Sean Paul Reviewed-by: Rob Herring Signed-off-by: Douglas Anderson Signed-off-by: Sean Paul Link: https://patchwork.freedesktop.org/patch/msgid/20181025222134.174583-1-dianders@chromium.org --- Documentation/devicetree/bindings/display/panel/simple-panel.txt | 3 +++ 1 file changed, 3 insertions(+) (limited to 'Documentation/devicetree') diff --git a/Documentation/devicetree/bindings/display/panel/simple-panel.txt b/Documentation/devicetree/bindings/display/panel/simple-panel.txt index 45a457ad38f0..b2b872c710f2 100644 --- a/Documentation/devicetree/bindings/display/panel/simple-panel.txt +++ b/Documentation/devicetree/bindings/display/panel/simple-panel.txt @@ -11,6 +11,9 @@ Optional properties: - ddc-i2c-bus: phandle of an I2C controller used for DDC EDID probing - enable-gpios: GPIO pin to enable or disable the panel - backlight: phandle of the backlight device attached to the panel +- no-hpd: This panel is supposed to communicate that it's ready via HPD + (hot plug detect) signal, but the signal isn't hooked up so we should + hardcode the max delay from the panel spec when powering up the panel. Example: -- cgit v1.2.3 From c0e9ab24723cbc0be32993f02b34477929555e0d Mon Sep 17 00:00:00 2001 From: Douglas Anderson Date: Thu, 25 Oct 2018 15:21:33 -0700 Subject: dt-bindings: drm/panel: simple: Innolux TV123WAM is actually P120ZDG-BF1 As far as I can tell the bindings that were added in commit 9c04400f7ea6 ("dt-bindings: drm/panel: Document Innolux TV123WAM panel bindings") weren't actually for Innolux TV123WAM but were actually for Innolux P120ZDG-BF1. As far as I can tell the Innolux TV123WAM isn't a real panel and but it's a mosh between the TI TV123WAM and the Innolux P120ZDG-BF1. Let's unmosh. Here's my evidence: * Searching for TV123WAM on the Internet turns up a TI panel. While it's possible that an Innolux panel has the same model number as the TI Panel, it seems a little doubtful. Looking up the datasheet from the TI Panel shows that it's 1920 x 1280 and 259.2 mm x 172.8 mm. * As far as I know, the patch adding the Innolux Panel was supposed to be for the board that's sitting in front of me as I type this (support for that board is not yet upstream). On the back of that panel I see Innolux P120ZDZ-EZ1 rev B1. * Someone pointed me at a datasheet that's supposed to be for the panel in front of me (sorry, I can't share the datasheet). That datasheet has the string "p120zdg-bf1" * If I search for "P120ZDG-BF1" on the Internet I get hits for panels that are 2160x1440. They don't have datasheets, but the fact that the resolution matches is a good sign. While we doing the rename, also mention that no-hpd can be used with this panel. See the previous patch in this series ("drm/panel: simple: Add "no-hpd" delay for Innolux TV123WAM"). Fixes: 9c04400f7ea6 ("dt-bindings: drm/panel: Document Innolux TV123WAM panel bindings") Cc: Sandeep Panda Reviewed-by: Rob Herring Reviewed-by: Andrzej Hajda Signed-off-by: Douglas Anderson Signed-off-by: Sean Paul Link: https://patchwork.freedesktop.org/patch/msgid/20181025222134.174583-5-dianders@chromium.org --- .../bindings/display/panel/innolux,p120zdg-bf1.txt | 22 ++++++++++++++++++++++ .../bindings/display/panel/innolux,tv123wam.txt | 20 -------------------- 2 files changed, 22 insertions(+), 20 deletions(-) create mode 100644 Documentation/devicetree/bindings/display/panel/innolux,p120zdg-bf1.txt delete mode 100644 Documentation/devicetree/bindings/display/panel/innolux,tv123wam.txt (limited to 'Documentation/devicetree') diff --git a/Documentation/devicetree/bindings/display/panel/innolux,p120zdg-bf1.txt b/Documentation/devicetree/bindings/display/panel/innolux,p120zdg-bf1.txt new file mode 100644 index 000000000000..513f03466aba --- /dev/null +++ b/Documentation/devicetree/bindings/display/panel/innolux,p120zdg-bf1.txt @@ -0,0 +1,22 @@ +Innolux P120ZDG-BF1 12.02 inch eDP 2K display panel + +This binding is compatible with the simple-panel binding, which is specified +in simple-panel.txt in this directory. + +Required properties: +- compatible: should be "innolux,p120zdg-bf1" +- power-supply: regulator to provide the supply voltage + +Optional properties: +- enable-gpios: GPIO pin to enable or disable the panel +- backlight: phandle of the backlight device attached to the panel +- no-hpd: If HPD isn't hooked up; add this property. + +Example: + panel_edp: panel-edp { + compatible = "innolux,p120zdg-bf1"; + enable-gpios = <&msmgpio 31 GPIO_ACTIVE_LOW>; + power-supply = <&pm8916_l2>; + backlight = <&backlight>; + no-hpd; + }; diff --git a/Documentation/devicetree/bindings/display/panel/innolux,tv123wam.txt b/Documentation/devicetree/bindings/display/panel/innolux,tv123wam.txt deleted file mode 100644 index a9b35265fa13..000000000000 --- a/Documentation/devicetree/bindings/display/panel/innolux,tv123wam.txt +++ /dev/null @@ -1,20 +0,0 @@ -Innolux TV123WAM 12.3 inch eDP 2K display panel - -This binding is compatible with the simple-panel binding, which is specified -in simple-panel.txt in this directory. - -Required properties: -- compatible: should be "innolux,tv123wam" -- power-supply: regulator to provide the supply voltage - -Optional properties: -- enable-gpios: GPIO pin to enable or disable the panel -- backlight: phandle of the backlight device attached to the panel - -Example: - panel_edp: panel-edp { - compatible = "innolux,tv123wam"; - enable-gpios = <&msmgpio 31 GPIO_ACTIVE_LOW>; - power-supply = <&pm8916_l2>; - backlight = <&backlight>; - }; -- cgit v1.2.3