Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
OMAPDSS: fix rounding when calculating fclk rate
"clk: divider: fix rate calculation for fractional rates" patch (and
similar for TI specific divider) fixes the clk-divider's rounding. This
patch updates the DSS driver to round the rates accordingly.
This fixes the DSS's warnings about clock rate mismatch, and also fixes
the wrong fclk rate being set.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Tested-by: Christoph Fritz <chf.fritz@googlemail.com>
Tested-by: Marek Belisko <marek@goldelico.com>
+2
-2
+2
-2
drivers/video/omap2/dss/dss.c
+2
-2
drivers/video/omap2/dss/dss.c
···
457
457
fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul);
458
458
459
459
for (fckd = fckd_start; fckd >= fckd_stop; --fckd) {
460
-
fck = prate / fckd * m;
460
+
fck = DIV_ROUND_UP(prate, fckd) * m;
461
461
462
462
if (func(fck, data))
463
463
return true;
···
506
506
507
507
fck_div = DIV_ROUND_UP(prate * dss.feat->dss_fck_multiplier,
508
508
max_dss_fck);
509
-
fck = prate / fck_div * dss.feat->dss_fck_multiplier;
509
+
fck = DIV_ROUND_UP(prate, fck_div) * dss.feat->dss_fck_multiplier;
510
510
}
511
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512
512
r = dss_set_fck_rate(fck);