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author | Dave Airlie <airlied@redhat.com> | 2020-03-12 05:42:41 +0300 |
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committer | Dave Airlie <airlied@redhat.com> | 2020-03-12 05:42:56 +0300 |
commit | 9e12da086e5e38f7b4f8d6e02a82447f4165fbee (patch) | |
tree | 96e6029378ccb9ae3f9530d019c8216a3ca4a556 /Documentation/devicetree/bindings/display/panel/display-timing.txt | |
parent | d3bd37f587b4438d47751d0f1d5aaae3d39bd416 (diff) | |
parent | bc1a4130fc0309cc2f43b9cc616ebbc295e886ff (diff) | |
download | linux-9e12da086e5e38f7b4f8d6e02a82447f4165fbee.tar.xz |
Merge tag 'drm-misc-next-2020-03-09' of git://anongit.freedesktop.org/drm/drm-misc into drm-next
drm-misc-next for 5.7:
UAPI Changes:
Cross-subsystem Changes:
Core Changes:
Driver Changes:
- fb-helper: Remove drm_fb_helper_{add,add_all,remove}_one_connector
- fbdev: some cleanups and dead-code removal
- Conversions to simple-encoder
- zero-length array removal
- Panel: panel-dpi support in panel-simple, Novatek NT35510, Elida
KD35T133,
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20200309135439.dicfnbo4ikj4tkz7@gilmour
Diffstat (limited to 'Documentation/devicetree/bindings/display/panel/display-timing.txt')
-rw-r--r-- | Documentation/devicetree/bindings/display/panel/display-timing.txt | 124 |
1 files changed, 1 insertions, 123 deletions
diff --git a/Documentation/devicetree/bindings/display/panel/display-timing.txt b/Documentation/devicetree/bindings/display/panel/display-timing.txt index 78222ced1874..7f55ad4a40c4 100644 --- a/Documentation/devicetree/bindings/display/panel/display-timing.txt +++ b/Documentation/devicetree/bindings/display/panel/display-timing.txt @@ -1,123 +1 @@ -display-timing bindings -======================= - -display-timings node --------------------- - -required properties: - - none - -optional properties: - - native-mode: The native mode for the display, in case multiple modes are - provided. When omitted, assume the first node is the native. - -timing subnode --------------- - -required properties: - - hactive, vactive: display resolution - - hfront-porch, hback-porch, hsync-len: horizontal display timing parameters - in pixels - vfront-porch, vback-porch, vsync-len: vertical display timing parameters in - lines - - clock-frequency: display clock in Hz - -optional properties: - - hsync-active: hsync pulse is active low/high/ignored - - vsync-active: vsync pulse is active low/high/ignored - - de-active: data-enable pulse is active low/high/ignored - - pixelclk-active: with - - active high = drive pixel data on rising edge/ - sample data on falling edge - - active low = drive pixel data on falling edge/ - sample data on rising edge - - ignored = ignored - - syncclk-active: with - - active high = drive sync on rising edge/ - sample sync on falling edge of pixel - clock - - active low = drive sync on falling edge/ - sample sync on rising edge of pixel - clock - - omitted = same configuration as pixelclk-active - - interlaced (bool): boolean to enable interlaced mode - - doublescan (bool): boolean to enable doublescan mode - - doubleclk (bool): boolean to enable doubleclock mode - -All the optional properties that are not bool follow the following logic: - <1>: high active - <0>: low active - omitted: not used on hardware - -There are different ways of describing the capabilities of a display. The -devicetree representation corresponds to the one commonly found in datasheets -for displays. If a display supports multiple signal timings, the native-mode -can be specified. - -The parameters are defined as: - - +----------+-------------------------------------+----------+-------+ - | | ^ | | | - | | |vback_porch | | | - | | v | | | - +----------#######################################----------+-------+ - | # ^ # | | - | # | # | | - | hback # | # hfront | hsync | - | porch # | hactive # porch | len | - |<-------->#<-------+--------------------------->#<-------->|<----->| - | # | # | | - | # |vactive # | | - | # | # | | - | # v # | | - +----------#######################################----------+-------+ - | | ^ | | | - | | |vfront_porch | | | - | | v | | | - +----------+-------------------------------------+----------+-------+ - | | ^ | | | - | | |vsync_len | | | - | | v | | | - +----------+-------------------------------------+----------+-------+ - -Note: In addition to being used as subnode(s) of display-timings, the timing - subnode may also be used on its own. This is appropriate if only one mode - need be conveyed. In this case, the node should be named 'panel-timing'. - - -Example: - - display-timings { - native-mode = <&timing0>; - timing0: 1080p24 { - /* 1920x1080p24 */ - clock-frequency = <52000000>; - hactive = <1920>; - vactive = <1080>; - hfront-porch = <25>; - hback-porch = <25>; - hsync-len = <25>; - vback-porch = <2>; - vfront-porch = <2>; - vsync-len = <2>; - hsync-active = <1>; - }; - }; - -Every required property also supports the use of ranges, so the commonly used -datasheet description with minimum, typical and maximum values can be used. - -Example: - - timing1: timing { - /* 1920x1080p24 */ - clock-frequency = <148500000>; - hactive = <1920>; - vactive = <1080>; - hsync-len = <0 44 60>; - hfront-porch = <80 88 95>; - hback-porch = <100 148 160>; - vfront-porch = <0 4 6>; - vback-porch = <0 36 50>; - vsync-len = <0 5 6>; - }; +See display-timings.yaml in this directory. |