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clk: do not release clock only for LPRO->HPRO transition #3762

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Merged
mwasko merged 1 commit into from
Mar 8, 2021
Merged

clk: do not release clock only for LPRO->HPRO transition #3762

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7 changes: 6 additions & 1 deletion src/platform/intel/cavs/lib/clk.c
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Original file line number Diff line number Diff line change
Expand Up @@ -167,7 +167,12 @@ static void platform_clock_low_power_mode(int clock, bool enable)
int freq_idx = *cache_to_uncache(&active_freq_idx);

if (enable && current_freq_idx > CPU_LPRO_FREQ_IDX)
select_cpu_clock(CPU_LPRO_FREQ_IDX, true);
/* LPRO requests are fast, but requests for other ROs
* can take a lot of time. That's why it's better to
* not release active clock just for waiti,
* so they can be switched without delay on wake up.
*/
select_cpu_clock(CPU_LPRO_FREQ_IDX, false);
else if (!enable && current_freq_idx != freq_idx)
select_cpu_clock(freq_idx, true);
}
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