1af824649b
The pads were an earlier workaround for the internal image pipeline in the Linux fbdev subsystem. As we move to generic definition of display properties and drivers that no longer need this to work, deprecate this property. Cc: Pawel Moll <pawel.moll@arm.com> Cc: Liviu Dudau <Liviu.Dudau@arm.com> Cc: devicetree@vger.kernel.org Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20190724134959.2365-1-linus.walleij@linaro.org
111 lines
3.2 KiB
Plaintext
111 lines
3.2 KiB
Plaintext
* ARM PrimeCell Color LCD Controller PL110/PL111
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See also Documentation/devicetree/bindings/arm/primecell.yaml
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Required properties:
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- compatible: must be one of:
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"arm,pl110", "arm,primecell"
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"arm,pl111", "arm,primecell"
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- reg: base address and size of the control registers block
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- interrupt-names: either the single entry "combined" representing a
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combined interrupt output (CLCDINTR), or the four entries
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"mbe", "vcomp", "lnbu", "fuf" representing the individual
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CLCDMBEINTR, CLCDVCOMPINTR, CLCDLNBUINTR, CLCDFUFINTR interrupts
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- interrupts: contains an interrupt specifier for each entry in
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interrupt-names
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- clock-names: should contain "clcdclk" and "apb_pclk"
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- clocks: contains phandle and clock specifier pairs for the entries
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in the clock-names property. See
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Documentation/devicetree/bindings/clock/clock-bindings.txt
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Optional properties:
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- memory-region: phandle to a node describing memory (see
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Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt)
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to be used for the framebuffer; if not present, the framebuffer
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may be located anywhere in the memory
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- max-memory-bandwidth: maximum bandwidth in bytes per second that the
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cell's memory interface can handle; if not present, the memory
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interface is fast enough to handle all possible video modes
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Required sub-nodes:
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- port: describes LCD panel signals, following the common binding
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for video transmitter interfaces; see
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Documentation/devicetree/bindings/media/video-interfaces.txt
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Deprecated properties:
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The port's endbpoint subnode had this, now deprecated property
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in the past. Drivers should be able to survive without it:
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- arm,pl11x,tft-r0g0b0-pads: an array of three 32-bit values,
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defining the way CLD pads are wired up; first value
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contains index of the "CLD" external pin (pad) used
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as R0 (first bit of the red component), second value
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index of the pad used as G0, third value index of the
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pad used as B0, see also "LCD panel signal multiplexing
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details" paragraphs in the PL110/PL111 Technical
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Reference Manuals; this implicitly defines available
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color modes, for example:
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- PL111 TFT 4:4:4 panel:
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arm,pl11x,tft-r0g0b0-pads = <4 15 20>;
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- PL110 TFT (1:)5:5:5 panel:
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arm,pl11x,tft-r0g0b0-pads = <1 7 13>;
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- PL111 TFT (1:)5:5:5 panel:
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arm,pl11x,tft-r0g0b0-pads = <3 11 19>;
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- PL111 TFT 5:6:5 panel:
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arm,pl11x,tft-r0g0b0-pads = <3 10 19>;
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- PL110 and PL111 TFT 8:8:8 panel:
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arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
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- PL110 and PL111 TFT 8:8:8 panel, R & B components swapped:
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arm,pl11x,tft-r0g0b0-pads = <16 8 0>;
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Example:
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clcd@10020000 {
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compatible = "arm,pl111", "arm,primecell";
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reg = <0x10020000 0x1000>;
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interrupt-names = "combined";
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interrupts = <0 44 4>;
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clocks = <&oscclk1>, <&oscclk2>;
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clock-names = "clcdclk", "apb_pclk";
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max-memory-bandwidth = <94371840>; /* Bps, 1024x768@60 16bpp */
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port {
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clcd_pads: endpoint {
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remote-endpoint = <&clcd_panel>;
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};
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};
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};
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panel {
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compatible = "panel-dpi";
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port {
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clcd_panel: endpoint {
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remote-endpoint = <&clcd_pads>;
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};
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};
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panel-timing {
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clock-frequency = <25175000>;
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hactive = <640>;
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hback-porch = <40>;
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hfront-porch = <24>;
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hsync-len = <96>;
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vactive = <480>;
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vback-porch = <32>;
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vfront-porch = <11>;
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vsync-len = <2>;
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};
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};
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