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Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/fb/mdss-dsi-panel.txt | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/fb/mdss-dsi-panel.txt b/Documentation/devicetree/bindings/fb/mdss-dsi-panel.txt index 90abf0305319..68b8f09238e0 100644 --- a/Documentation/devicetree/bindings/fb/mdss-dsi-panel.txt +++ b/Documentation/devicetree/bindings/fb/mdss-dsi-panel.txt @@ -249,6 +249,35 @@ Optional properties: 60 = 60 frames per second (default) - qcom,mdss-dsi-panel-clockrate: A 64 bit value specifies the panel clock speed in Hz. 0 = default value. +- qcom,mdss-mdp-kickoff-threshold: This property can be used to define a region + (in terms of scanlines) where the +hardware is allowed + to trigger a data transfer from MDP to DSI. + If this property is used, the region must be defined setting + two values, the low and the high thresholds: + <low_threshold high_threshold> + Where following condition must be met: + low_threshold < high_threshold + These values will be used by the driver in such way that if + the Driver receives a request to kickoff a transfer (MDP to DSI), + the transfer will be triggered only if the following condition + is satisfied: + low_threshold < scanline < high_threshold + If the condition is not met, then the driver will delay the + transfer by the time defined in the following property: + "qcom,mdss-mdp-kickoff-delay". + So in order to use this property, the delay property must + be defined as well and greater than 0. +- qcom,mdss-mdp-kickoff-delay: This property defines the delay in microseconds that + the driver will delay before triggering an MDP transfer if the + thresholds defined by the following property are not met: + "qcom,mdss-mdp-kickoff-threshold". + So in order to use this property, the threshold property must + be defined as well. Note that this delay cannot be zero + and also should not be greater than +the fps window. + i.e. For 60fps value should not exceed +16666 uS. - qcom,mdss-mdp-transfer-time-us: Specifies the dsi transfer time for command mode panels in microseconds. Driver uses this number to adjust the clock rate according to the expected transfer time. @@ -568,6 +597,8 @@ Example: qcom,mdss-dsi-dma-trigger = <0>; qcom,mdss-dsi-panel-framerate = <60>; qcom,mdss-dsi-panel-clockrate = <424000000>; + qcom,mdss-mdp-kickoff-threshold = <11 2430>; + qcom,mdss-mdp-kickoff-delay = <1000>; qcom,mdss-mdp-transfer-time-us = <12500>; qcom,mdss-dsi-panel-timings = [7d 25 1d 00 37 33 22 27 1e 03 04 00]; |