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video: rockchip: mpp: report zero load for idle devices #517

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video: rockchip: mpp: report zero load for idle devices #517

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24 changes: 22 additions & 2 deletions drivers/video/rockchip/mpp/mpp_service.c
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Original file line number Diff line number Diff line change
Expand Up @@ -329,13 +329,33 @@ static int mpp_show_device_load(struct seq_file *file, void *v)

for (j = 0; j < MPP_MAX_CORE_NUM; j++) {
struct mpp_dev *mpp = queue->cores[j];
struct mpp_load_info *load_info;
u32 load, load_frac, util, util_frac;

if (!mpp)
continue;

load_info = &mpp->load_info;
load = load_info->load;
load_frac = load_info->load_frac;
util = load_info->utilization;
util_frac = load_info->utilization_frac;

/*
* load_info is only refreshed by mpp_dev_load() on task
* completion, so an idle device keeps reporting the last
* busy interval forever. If no task has updated the stats
* for more than one load_interval, the device has gone
* idle: report zero instead of the stale snapshot.
*/
if (!mpp->load_en ||
ktime_us_delta(ktime_get(), load_info->load_time) >
(s64)srv->load_interval * 1000 * 2)
load = load_frac = util = util_frac = 0;

seq_printf(file, "%-25s load: %3d.%02d%% utilization: %3d.%02d%%\n",
dev_name(mpp->dev),
mpp->load_info.load, mpp->load_info.load_frac,
mpp->load_info.utilization, mpp->load_info.utilization_frac);
load, load_frac, util, util_frac);
}
}

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