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From:   Herve Codina <herve.codina@bootlin.com>
To:     Herve Codina <herve.codina@bootlin.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
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        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
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        Mark Brown <broonie@kernel.org>,
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        Randy Dunlap <rdunlap@infradead.org>
Cc:     netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
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        alsa-devel@alsa-project.org, Simon Horman <horms@kernel.org>,
        Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Subject: [PATCH v6 18/30] soc: fsl: cpm1: qmc: Split Tx and Rx TSA entries setup
Date:   Fri, 22 Sep 2023 09:58:53 +0200
Message-ID: <20230922075913.422435-19-herve.codina@bootlin.com>
In-Reply-To: <20230922075913.422435-1-herve.codina@bootlin.com>
References: <20230922075913.422435-1-herve.codina@bootlin.com>
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The Tx and Rx entries for a given channel are set in one function.

In order to modify Rx entries and Tx entries independently of one other,
split this function in one for the Rx part and one for the Tx part.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 drivers/soc/fsl/qe/qmc.c | 49 ++++++++++++++++++++++++++++------------
 1 file changed, 35 insertions(+), 14 deletions(-)

diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c
index 26cd7e1ccafc..eeceb81bf107 100644
--- a/drivers/soc/fsl/qe/qmc.c
+++ b/drivers/soc/fsl/qe/qmc.c
@@ -610,14 +610,14 @@ static int qmc_chan_setup_tsa_64rxtx(struct qmc_chan *chan, const struct tsa_ser
 	return 0;
 }
 
-static int qmc_chan_setup_tsa_32rx_32tx(struct qmc_chan *chan, const struct tsa_serial_info *info,
-					bool enable)
+static int qmc_chan_setup_tsa_32rx(struct qmc_chan *chan, const struct tsa_serial_info *info,
+				   bool enable)
 {
 	unsigned int i;
 	u16 curr;
 	u16 val;
 
-	/* Use a Tx 32 entries table and a Rx 32 entries table */
+	/* Use a Rx 32 entries table */
 
 	val = QMC_TSA_VALID | QMC_TSA_MASK | QMC_TSA_CHANNEL(chan->id);
 
@@ -633,6 +633,30 @@ static int qmc_chan_setup_tsa_32rx_32tx(struct qmc_chan *chan, const struct tsa_
 			return -EBUSY;
 		}
 	}
+
+	/* Set entries based on Rx stuff */
+	for (i = 0; i < info->nb_rx_ts; i++) {
+		if (!(chan->rx_ts_mask & (((u64)1) << i)))
+			continue;
+
+		qmc_clrsetbits16(chan->qmc->scc_pram + QMC_GBL_TSATRX + (i * 2),
+				 ~QMC_TSA_WRAP, enable ? val : 0x0000);
+	}
+
+	return 0;
+}
+
+static int qmc_chan_setup_tsa_32tx(struct qmc_chan *chan, const struct tsa_serial_info *info,
+				   bool enable)
+{
+	unsigned int i;
+	u16 curr;
+	u16 val;
+
+	/* Use a Tx 32 entries table */
+
+	val = QMC_TSA_VALID | QMC_TSA_MASK | QMC_TSA_CHANNEL(chan->id);
+
 	/* Check entries based on Tx stuff */
 	for (i = 0; i < info->nb_tx_ts; i++) {
 		if (!(chan->tx_ts_mask & (((u64)1) << i)))
@@ -646,14 +670,6 @@ static int qmc_chan_setup_tsa_32rx_32tx(struct qmc_chan *chan, const struct tsa_
 		}
 	}
 
-	/* Set entries based on Rx stuff */
-	for (i = 0; i < info->nb_rx_ts; i++) {
-		if (!(chan->rx_ts_mask & (((u64)1) << i)))
-			continue;
-
-		qmc_clrsetbits16(chan->qmc->scc_pram + QMC_GBL_TSATRX + (i * 2),
-				 ~QMC_TSA_WRAP, enable ? val : 0x0000);
-	}
 	/* Set entries based on Tx stuff */
 	for (i = 0; i < info->nb_tx_ts; i++) {
 		if (!(chan->tx_ts_mask & (((u64)1) << i)))
@@ -680,9 +696,14 @@ static int qmc_chan_setup_tsa(struct qmc_chan *chan, bool enable)
 	 * Setup one common 64 entries table or two 32 entries (one for Tx
 	 * and one for Tx) according to assigned TS numbers.
 	 */
-	return ((info.nb_tx_ts > 32) || (info.nb_rx_ts > 32)) ?
-		qmc_chan_setup_tsa_64rxtx(chan, &info, enable) :
-		qmc_chan_setup_tsa_32rx_32tx(chan, &info, enable);
+	if (info.nb_tx_ts > 32 || info.nb_rx_ts > 32)
+		return qmc_chan_setup_tsa_64rxtx(chan, &info, enable);
+
+	ret = qmc_chan_setup_tsa_32rx(chan, &info, enable);
+	if (ret)
+		return ret;
+
+	return qmc_chan_setup_tsa_32tx(chan, &info, enable);
 }
 
 static int qmc_chan_command(struct qmc_chan *chan, u8 qmc_opcode)
-- 
2.41.0