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soc: apple: clpc: hand the T8140 GPU floor back 100 ms after the PMP stops limiting #245

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soc: apple: clpc: hand the T8140 GPU floor back 100 ms after the PMP stops limiting #245

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9 changes: 7 additions & 2 deletions drivers/soc/apple/clpc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -48,8 +48,13 @@ enum apple_clpc_rail {
#define APPLE_CLPC_BUSY_PCT 50
/* Time a rail keeps its last request after demand stops */
#define APPLE_CLPC_HOLD_MS 32
/* Time the GPU floor stays released after the PMP last limited the DCS */
#define APPLE_CLPC_GPU_BACKOFF_MS 1000
/*
* Time the GPU floor stays released after the PMP last limited the DCS. Under
* sustained heavy rendering the PMP limits the DCS again well within this, so
* the floor stays released; light submissions that follow get the floor back
* this long after the PMP stops limiting.
*/
#define APPLE_CLPC_GPU_BACKOFF_MS 100

/**
* struct apple_clpc_hw - per-SoC CLPC parameters
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