Decode Min/Max Frequency Range?

Tom_Bond · September 23, 2019, 7:04pm

Hi All,

Referencing this section of Nano spec “For low power operations, the video decoder can operate at the lowest possible frequency while maintaining real-time decoding using dynamic frequency scaling techniques”.

So the question is what is the decoder frequency range?

Tom

DaneLLL · September 24, 2019, 2:25am

Hi,
Please check

/sys/kernel/debug/bpmp/debug/clk/nvdec/min_rate
/sys/kernel/debug/bpmp/debug/clk/nvdec/max_rate

Tom_Bond · September 24, 2019, 11:46am

There are no such files on the jetson nano and also the path doesn’t exist.

DaneLLL · September 24, 2019, 12:08pm

Hi,
The nodes are for TX2. Will update the nodes for Jetson Nano.

DaneLLL · September 25, 2019, 2:13am

Hi,
On Jetson Nano, please check dvfs table:

# cat /sys/kernel/debug/tegra_dvfs/dvfs_table | grep nvdec
nvdec             268.8  268.8  384.0  448.0  486.4  550.4  576.0  614.4  652.8  678.4  691.2  691.2  716.8

It is in MHz.