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Debug Message show fps allways 0 in fbtft_update_display #328

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Debug Message show fps allways 0 in fbtft_update_display #328

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4 changes: 2 additions & 2 deletions drivers/staging/fbtft/fbtft-core.c
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Original file line number Diff line number Diff line change
Expand Up @@ -391,10 +391,9 @@ static void fbtft_update_display(struct fbtft_par *par, unsigned start_line,

if (unlikely(timeit)) {
ts_end = ktime_get();
if (ktime_to_ns(par->update_time))
if (!ktime_to_ns(par->update_time))
par->update_time = ts_start;

par->update_time = ts_start;
fps = ktime_us_delta(ts_start, par->update_time);
fps = fps ? 1000000 / fps : 0;

Expand All @@ -406,6 +405,7 @@ static void fbtft_update_display(struct fbtft_par *par, unsigned start_line,
"Display update: %ld kB/s, fps=%ld\n",
throughput, fps);
par->first_update_done = true;
par->update_time = ts_start;
}
}

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