ext: mcux: csi: Fix wrong circular queue delta calculation

Loic Poulain · galak · commit 14aa624c6be2 · 2019-04-17T10:23:56.000-05:00
This error causes various instabilities during capture.

Signed-off-by: Loic Poulain &lt;loic.poulain@linaro.org&gt;
diff --git a/ext/hal/nxp/mcux/drivers/imx/fsl_csi.c b/ext/hal/nxp/mcux/drivers/imx/fsl_csi.c
@@ -146,7 +146,7 @@ static uint32_t CSI_TransferGetQueueDelta(uint32_t startIdx, uint32_t endIdx)
     }
     else
     {
-        return startIdx + CSI_DRIVER_ACTUAL_QUEUE_SIZE - endIdx;
+        return endIdx + CSI_DRIVER_ACTUAL_QUEUE_SIZE - startIdx;
     }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -146,7 +146,7 @@ static uint32_t CSI_TransferGetQueueDelta(uint32_t startIdx, uint32_t endIdx)`
`146`	`146`	`}`
`147`	`147`	`else`
`148`	`148`	`{`
`149`		`- return startIdx + CSI_DRIVER_ACTUAL_QUEUE_SIZE - endIdx;`
	`149`	`+ return endIdx + CSI_DRIVER_ACTUAL_QUEUE_SIZE - startIdx;`
`150`	`150`	`}`
`151`	`151`	`}`
`152`	`152`