https://community.nxp.com/t5/i-MX-Processors/How-to-ajust-imx6ull-dma-aging-timer/m-p/1441230#M189085 <P>Hi, NXP experts：</P><P>I find a note in imx-uart driver drivers/tty/serial/imx.c says:</P><P><EM>* There are two kinds of RX DMA interrupts(such as in the MX6Q):</EM><BR /><EM>* [1] the RX DMA buffer is full.</EM><BR /><EM>* [2] the <STRONG>aging timer expires</STRONG></EM><BR /><EM>*</EM><BR /><EM>* Condition [2] is triggered when a character has been sitting in the FIFO</EM><BR /><EM>* for at least <STRONG>8 byte durations</STRONG>.</EM></P><P>&nbsp;</P><P>So how&nbsp;to ajust imx6ull dma aging durations shorter?</P> Fri, 08 Apr 2022 10:32:22 GMT changbaoma 2022-04-08T10:32:22Z https://community.nxp.com/t5/i-MX-Processors/How-to-ajust-imx6ull-dma-aging-timer/m-p/1441230#M189085 <P>Hi, NXP experts：</P><P>I find a note in imx-uart driver drivers/tty/serial/imx.c says:</P><P><EM>* There are two kinds of RX DMA interrupts(such as in the MX6Q):</EM><BR /><EM>* [1] the RX DMA buffer is full.</EM><BR /><EM>* [2] the <STRONG>aging timer expires</STRONG></EM><BR /><EM>*</EM><BR /><EM>* Condition [2] is triggered when a character has been sitting in the FIFO</EM><BR /><EM>* for at least <STRONG>8 byte durations</STRONG>.</EM></P><P>&nbsp;</P><P>So how&nbsp;to ajust imx6ull dma aging durations shorter?</P> Fri, 08 Apr 2022 10:32:22 GMT https://community.nxp.com/t5/i-MX-Processors/How-to-ajust-imx6ull-dma-aging-timer/m-p/1441230#M189085 changbaoma 2022-04-08T10:32:22Z