From nobody Wed Apr 8 09:41:54 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56157C32789 for ; Mon, 22 Aug 2022 09:17:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234316AbiHVJRe (ORCPT ); Mon, 22 Aug 2022 05:17:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59540 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234595AbiHVJPx (ORCPT ); Mon, 22 Aug 2022 05:15:53 -0400 Received: from fllv0016.ext.ti.com (fllv0016.ext.ti.com [198.47.19.142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C60252A40A; Mon, 22 Aug 2022 02:15:40 -0700 (PDT) Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 27M9FZbu019388; Mon, 22 Aug 2022 04:15:35 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1661159735; bh=CCFuC6F3PDmk2qInbJWBLRf6Yk6t6h+PLhjhJhuGEiU=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=wVHPOOoOSXMNWegBZxJgN9tTlzrUxjqKFEC2pfWyu1jkiRQVmWYH48cilDIOW81A4 GXbLcOKJryRxCgnVAVsaVziLaLnwBdnwv+Q76xPG0blv49+9fwhorbI1fneWITb5uh VN91c/YXBIolZRYwsNATRwAawDB84QRYNLmzhpmM= Received: from DLEE115.ent.ti.com (dlee115.ent.ti.com [157.170.170.26]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 27M9FYu9111259 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 22 Aug 2022 04:15:35 -0500 Received: from DLEE100.ent.ti.com (157.170.170.30) by DLEE115.ent.ti.com (157.170.170.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.6; Mon, 22 Aug 2022 04:15:34 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.6 via Frontend Transport; Mon, 22 Aug 2022 04:15:34 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 27M9FXYS037071; Mon, 22 Aug 2022 04:15:34 -0500 From: Vaishnav Achath To: , , , , , CC: , , Subject: [PATCH 1/2] dmaengine: ti: k3-udma: Respond TX done if DMA_PREP_INTERRUPT is not requested Date: Mon, 22 Aug 2022 14:45:30 +0530 Message-ID: <20220822091531.27827-2-vaishnav.a@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220822091531.27827-1-vaishnav.a@ti.com> References: <20220822091531.27827-1-vaishnav.a@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" When the DMA consumer driver does not expect the callback for TX done, There is no need to perform the channel RT byte counter calculations=20 and estimate the completion but return complete on first attempt itself. This assumes that the consumer who did not request DMA_PREP_INTERRUPT=20 has its own mechanism for understanding TX completion, example: MCSPI EOW interrupt can be used as TX completion signal for a SPI transaction. Signed-off-by: Vaishnav Achath Acked-by: Peter Ujfalusi --- drivers/dma/ti/k3-udma.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c index 39b330ada200..03d579068453 100644 --- a/drivers/dma/ti/k3-udma.c +++ b/drivers/dma/ti/k3-udma.c @@ -263,6 +263,7 @@ struct udma_chan_config { enum udma_tp_level channel_tpl; /* Channel Throughput Level */ =20 u32 tr_trigger_type; + unsigned long tx_flags; =20 /* PKDMA mapped channel */ int mapped_channel_id; @@ -1057,7 +1058,7 @@ static bool udma_is_desc_really_done(struct udma_chan= *uc, struct udma_desc *d) =20 /* Only TX towards PDMA is affected */ if (uc->config.ep_type =3D=3D PSIL_EP_NATIVE || - uc->config.dir !=3D DMA_MEM_TO_DEV) + uc->config.dir !=3D DMA_MEM_TO_DEV || !(uc->config.tx_flags & DMA_PRE= P_INTERRUPT)) return true; =20 peer_bcnt =3D udma_tchanrt_read(uc, UDMA_CHAN_RT_PEER_BCNT_REG); @@ -3418,6 +3419,8 @@ udma_prep_slave_sg(struct dma_chan *chan, struct scat= terlist *sgl, if (!burst) burst =3D 1; =20 + uc->config.tx_flags =3D tx_flags; + if (uc->config.pkt_mode) d =3D udma_prep_slave_sg_pkt(uc, sgl, sglen, dir, tx_flags, context); --=20 2.17.1