linux-kernel - [PATCH V4 1/3] ASoC: fsl_asrc: Fix the issue about unsupported rate

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Message-ID: <06c3e420b9fabfbec67becc2f9de009ce79a1d4b.1555669068.git.shengjiu.wang@nxp.com>
Date:   Fri, 19 Apr 2019 10:23:50 +0000
From:   "S.j. Wang" <shengjiu.wang@....com>
To:     "timur@...nel.org" <timur@...nel.org>,
        "nicoleotsuka@...il.com" <nicoleotsuka@...il.com>,
        "Xiubo.Lee@...il.com" <Xiubo.Lee@...il.com>,
        "festevam@...il.com" <festevam@...il.com>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>
CC:     "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH V4 1/3] ASoC: fsl_asrc: Fix the issue about unsupported rate

When the output sample rate is [8kHz, 30kHz], the limitation
of the supported ratio range is (1/24, 8). In the driver
we use (8kHz, 30kHz) instead of [8kHz, 30kHz].
So this patch is to fix this issue and the potential rounding
issue with divider.

Fixes: fff6e03c7b65 ("ASoC: fsl_asrc: add support for 8-30kHz
output sample rate")
Cc: <stable@...r.kernel.org>
Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
---
 sound/soc/fsl/fsl_asrc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
index 0b937924d2e4..5b8adc7fb117 100644
--- a/sound/soc/fsl/fsl_asrc.c
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -282,10 +282,10 @@ static int fsl_asrc_config_pair(struct fsl_asrc_pair *pair)
 		return -EINVAL;
 	}
 
-	if ((outrate > 8000 && outrate < 30000) &&
-	    (outrate/inrate > 24 || inrate/outrate > 8)) {
-		pair_err("exceed supported ratio range [1/24, 8] for \
-				inrate/outrate: %d/%d\n", inrate, outrate);
+	if ((outrate >= 8000 && outrate <= 30000) &&
+	    (outrate > 24 * inrate || inrate > 8 * outrate)) {
+		pair_err("exceed supported ratio range (1/24, 8) for inrate/outrate: %d/%d\n",
+				inrate, outrate);
 		return -EINVAL;
 	}
 
-- 
1.9.1