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| author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-02-13 11:36:22 +0200 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-04-14 14:52:08 +0300 |
| commit | d0e224f9963b79610850b2a10622182176658022 (patch) | |
| tree | 418881116f13641add903db6dc6dc4dc119fc044 | |
| parent | 8d018647e00876e0c0e8dba13c52c882be4e1678 (diff) | |
| download | lwn-d0e224f9963b79610850b2a10622182176658022.tar.gz lwn-d0e224f9963b79610850b2a10622182176658022.zip | |
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>
| -rw-r--r-- | drivers/video/omap2/dss/dss.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c index 825c019ddee7..d55266c0e029 100644 --- a/drivers/video/omap2/dss/dss.c +++ b/drivers/video/omap2/dss/dss.c @@ -457,7 +457,7 @@ bool dss_div_calc(unsigned long pck, unsigned long fck_min, fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul); for (fckd = fckd_start; fckd >= fckd_stop; --fckd) { - fck = prate / fckd * m; + fck = DIV_ROUND_UP(prate, fckd) * m; if (func(fck, data)) return true; @@ -506,7 +506,7 @@ static int dss_setup_default_clock(void) fck_div = DIV_ROUND_UP(prate * dss.feat->dss_fck_multiplier, max_dss_fck); - fck = prate / fck_div * dss.feat->dss_fck_multiplier; + fck = DIV_ROUND_UP(prate, fck_div) * dss.feat->dss_fck_multiplier; } r = dss_set_fck_rate(fck); |