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ASoC: rsnd: Fixup SRCm_IFSVR calculate method

Message ID 87h9bewkwu.wl%kuninori.morimoto.gx@renesas.com (mailing list archive)
State Accepted
Commit 93ca33c99f22a0a096f83f19c9f887aeb67507a1
Headers show

Commit Message

Kuninori Morimoto July 25, 2016, 1:52 a.m. UTC 
From: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>

This patch fixes the calculation accuracy degradation of SRCm_IFSVR
register value.

Signed-off-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 sound/soc/sh/rcar/src.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
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Patch

diff --git a/sound/soc/sh/rcar/src.c b/sound/soc/sh/rcar/src.c
index e39f916..969a516 100644
--- a/sound/soc/sh/rcar/src.c
+++ b/sound/soc/sh/rcar/src.c
@@ -226,8 +226,12 @@  static void rsnd_src_set_convert_rate(struct rsnd_dai_stream *io,
 	ifscr = 0;
 	fsrate = 0;
 	if (fin != fout) {
+		u64 n;
+
 		ifscr = 1;
-		fsrate = 0x0400000 / fout * fin;
+		n = (u64)0x0400000 * fin;
+		do_div(n, fout);
+		fsrate = n;
 	}
 
 	/*