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Commit 67616a64 authored by Saravana Kannan's avatar Saravana Kannan
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PM / devfreq: bimc-bwmon: Reduce margin for HW workaround 



The HW workaround margin being too high reduces the effectiveness of the
interrupt. Try using a margin only when the measured bandwidth is too small
and risks the counter wrapping around multiple times before it's read.

Change-Id: Ic1e88ad360b2348dfb9ad314c42c1b0218010c1d
Signed-off-by: default avatarSaravana Kannan <skannan@codeaurora.org>
parent 169417fe

drivers/devfreq/bimc-bwmon.c

+5 −2
Original line number Diff line number Diff line
@@ -163,8 +163,11 @@ static unsigned long meas_bw_and_set_irq(struct bw_hwmon *hw, 


	mbps = mon_get_count(m);

	mbps = bytes_to_mbps(mbps, us);

	/* + 1024 is to workaround HW design issue. Needs further tuning. */

	limit = mbps_to_bytes(mbps + 1024, sample_ms, tol);

	/*

	 * The fudging of mbps when calculating limit is to workaround a HW

	 * design issue. Needs further tuning.

	 */

	limit = mbps_to_bytes(max(mbps, 400UL), sample_ms, tol);

	mon_set_limit(m, limit);



	mon_clear(m);