From patchwork Mon Jul 29 14:20:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13744993 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BD377C3DA4A for ; Mon, 29 Jul 2024 14:22:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=0UTWDzz2CSi9594bsioUgKxsyX0iygtz1joM8J6wTqE=; b=m3y3Eo6xOAB56VGln0Kw/SxELy gkmJ+Uu9O2MEtJqbmjD0QZLUCiDahtax/du/4I71X8dw/gEecWFNUrkh4QtxuuecO2FpBnl+FSaU/ rg8F4A5Sk/YxJ1j8HZ+i6FE24CotoQV/sAD1nn5L92eqDMApfD1PeKcgGwdsulLfTUzk77DNyIr/Y bknk2tHdQuWDhBz8vpSodJ/91dKdCnJqIIJhzcsNAZGhkHofGJ4fqygZ4kh1YLgjHrNV4wJroQOg0 8RWUYeYT4iIuEe3TLhXPhNs/Zeg01ucBDtzyketv127D+DARtJ520AnoIr7FjzTyyaBeKaCxi7P2S Tj2BUbkg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sYRG5-0000000BXzi-3Mhe; Mon, 29 Jul 2024 14:21:53 +0000 Received: from relay1-d.mail.gandi.net ([2001:4b98:dc4:8::221]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sYRFZ-0000000BXdT-0KpC for linux-arm-kernel@lists.infradead.org; Mon, 29 Jul 2024 14:21:23 +0000 Received: by mail.gandi.net (Postfix) with ESMTPA id 69F4024000E; Mon, 29 Jul 2024 14:21:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1722262877; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0UTWDzz2CSi9594bsioUgKxsyX0iygtz1joM8J6wTqE=; b=P6VwFSKeNFRSfHeZeDQlilHGy7HvfNNvRBUGGz5G2ghJ6QYYuNOxNc9KxoF2A9wggV60sp IstR9obpPlbrNbQqgyR6wAgj+hUQiePxAvur2b6Xb1t0gRefivdWpPjDxpF5hv7TwL9M3Y p0OZOMsWE4YV8Ih8CxBp+LGzi0ehR5JklSJoHAZxOMi0uWhrdAHuvm+ObabKR7jB9lx462 PQVRUfpmUjCdRx2g9s+qgvqyw+z4K/sQJNMahkLv5FykBUtqy1EdnlcQAvhtDgmbmXk7dI /sJk8ToTtwmaAVdEedQ9doGLXQs3ilGKXwEsPa6qAlXu83SxT6Y2RWYO5Lgv2A== From: Herve Codina To: Herve Codina , Christophe Leroy , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Qiang Zhao , Li Yang , Mark Brown Cc: linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Petazzoni Subject: [PATCH v1 02/36] soc: fsl: cpm1: qmc: Enable TRNSYNC only when needed Date: Mon, 29 Jul 2024 16:20:31 +0200 Message-ID: <20240729142107.104574-3-herve.codina@bootlin.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240729142107.104574-1-herve.codina@bootlin.com> References: <20240729142107.104574-1-herve.codina@bootlin.com> MIME-Version: 1.0 X-GND-Sasl: herve.codina@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240729_072121_610219_CBC08593 X-CRM114-Status: GOOD ( 14.04 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The TRNSYNC feature is enabled whatever the number of time-slots used. The feature is needed only when more than one time-slot is used. Improve the driver enabling TRNSYNC only when it is needed. Signed-off-by: Herve Codina --- drivers/soc/fsl/qe/qmc.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c index bacabf731dcb..916395745850 100644 --- a/drivers/soc/fsl/qe/qmc.c +++ b/drivers/soc/fsl/qe/qmc.c @@ -889,6 +889,7 @@ EXPORT_SYMBOL(qmc_chan_stop); static int qmc_setup_chan_trnsync(struct qmc *qmc, struct qmc_chan *chan) { struct tsa_serial_info info; + unsigned int w_rx, w_tx; u16 first_rx, last_tx; u16 trnsync; int ret; @@ -898,6 +899,14 @@ static int qmc_setup_chan_trnsync(struct qmc *qmc, struct qmc_chan *chan) if (ret) return ret; + w_rx = hweight64(chan->rx_ts_mask); + w_tx = hweight64(chan->tx_ts_mask); + if (w_rx <= 1 && w_tx <= 1) { + dev_dbg(qmc->dev, "only one or zero ts -> disable trnsync\n"); + qmc_clrbits16(chan->s_param + QMC_SPE_CHAMR, QMC_SPE_CHAMR_TRANSP_SYNC); + return 0; + } + /* Find the first Rx TS allocated to the channel */ first_rx = chan->rx_ts_mask ? __ffs64(chan->rx_ts_mask) + 1 : 0; @@ -911,6 +920,7 @@ static int qmc_setup_chan_trnsync(struct qmc *qmc, struct qmc_chan *chan) trnsync |= QMC_SPE_TRNSYNC_TX((last_tx % info.nb_tx_ts) * 2); qmc_write16(chan->s_param + QMC_SPE_TRNSYNC, trnsync); + qmc_setbits16(chan->s_param + QMC_SPE_CHAMR, QMC_SPE_CHAMR_TRANSP_SYNC); dev_dbg(qmc->dev, "chan %u: trnsync=0x%04x, rx %u/%u 0x%llx, tx %u/%u 0x%llx\n", chan->id, trnsync, @@ -1378,7 +1388,7 @@ static int qmc_setup_chan(struct qmc *qmc, struct qmc_chan *chan) if (chan->mode == QMC_TRANSPARENT) { qmc_write32(chan->s_param + QMC_SPE_ZDSTATE, 0x18000080); qmc_write16(chan->s_param + QMC_SPE_TMRBLR, 60); - val = QMC_SPE_CHAMR_MODE_TRANSP | QMC_SPE_CHAMR_TRANSP_SYNC; + val = QMC_SPE_CHAMR_MODE_TRANSP; if (chan->is_reverse_data) val |= QMC_SPE_CHAMR_TRANSP_RD; qmc_write16(chan->s_param + QMC_SPE_CHAMR, val);