53 lines
1.7 KiB
Plaintext
53 lines
1.7 KiB
Plaintext
Qualcomm MDSS EDP
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MDSS EDP is a edp driver which supports panels that are compatable with
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VESA EDP display interface specification.
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When configuring the optional properties for external backlight, one should also
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configure the gpio that drives the pwm to it.
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Required properties
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- compatible : Must be "qcom,mdss-edp".
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- reg : Offset and length of the register set for the
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device.
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- reg-names : Names to refer to register sets related to this
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device
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- vdda-supply : Phandle for vdd regulator device node.
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- gpio-panel-en : GPIO for supplying power to panel and backlight
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driver.
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- gpio-lvl-en : GPIO to enable HPD be received by host.
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- status : A string that has to be set to "okay/ok" to enable
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the driver. By default this property will be set to
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"disable". Will be set to "ok/okay" status for
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specific platforms.
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- qcom,mdss-fb-map: pHandle that specifies the framebuffer to which the
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interface is mapped.
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- gpio-panel-hpd : gpio pin use for edp hpd
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Optional properties
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- qcom,panel-lpg-channel : LPG channel for backlight.
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- qcom,panel-pwm-period : PWM period in microseconds.
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Optional properties:
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- qcom,mdss-brightness-max-level: Specifies the max brightness level supported.
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255 = default value.
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Example:
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mdss_edp: qcom,mdss_edp@fd923400 {
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compatible = "qcom,mdss-edp";
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reg = <0xfd923400 0x700>,
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<0xfd8c2000 0x1000>;
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reg-names = "edp_base", "mmss_cc_base";
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vdda-supply = <&pm8941_l12>;
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gpio-panel-en = <&msmgpio 58 0>;
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gpio-lvl-en = <&msmgpio 91 0>;
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qcom,panel-lpg-channel = <7>; /* LPG Channel 8 */
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qcom,panel-pwm-period = <53>;
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status = "disable";
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qcom,mdss-fb-map = <&mdss_fb0>;
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gpio-panel-hpd = <&msmgpio 102 0>;
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};
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