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OSD - Clarify display driver requirements.

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This commit is contained in:
Dominic Clifton 2022-01-23 15:23:10 +01:00
parent 2a9f0a50bb
commit 1f666add6c
1 changed files with 8 additions and 0 deletions
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8
src/main/drivers/display.h
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@ -60,7 +60,15 @@ typedef enum {
} displayPortBackground_e;
typedef enum {
// Display drivers that can perform screen clearing in the background, e.g. via DMA, should do so.
// use `displayCheckReady` function to check if the screen clear has been completed.
DISPLAY_CLEAR_NONE = 0,
// * when set, the display driver should block until the screen clear has completed, use in synchronous cases
// only, e.g. where the screen is cleared and the display is immediately drawn to.
// * when NOT set, return immediately and do not block unless screen is a simple operation or cannot
// be performed in the background. As with any long delay, waiting can cause task starvation which
// can result in RX loss.
DISPLAY_CLEAR_WAIT = 1 << 0,
} displayClearOption_e;