From patchwork Mon May 16 08:52:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikko Perttunen X-Patchwork-Id: 12850432 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 88A8EC433F5 for ; Mon, 16 May 2022 08:53:38 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C597610F3CF; Mon, 16 May 2022 08:53:36 +0000 (UTC) Received: from mail.kapsi.fi (mail.kapsi.fi [IPv6:2001:67c:1be8::25]) by gabe.freedesktop.org (Postfix) with ESMTPS id E787110EFE0 for ; Mon, 16 May 2022 08:53:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kapsi.fi; s=20161220; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=uAYlVlaSKiCol2osSU9jEMs5Zkro7eHEKz4SvQwuMgY=; b=cCYp7Uikdwy4YMIyYFg9ak33VM fqrRscO41wzaLajhphHvOMz0bgejJ1Q/EjsjYJXfo17Q9RgxkM+8p8N2BksmBKCZ6hfu4SuKDWeAH s+GCMR8khut5BBvOp86/atCC8yOk9RHCzaD2Y94b4B9ZOb0k5Caef8pY/FXDJvxLJBx+zjaoZUpgl b5b/3mZc9OytMUowQOt8HvTF6HA6hqKgRK3FxkV20wX5WxgfjOqaq9H70FR2C/w4aaSg2wQJ8wPan RR8O/XYPAqM2f7kVCKS5ykOom8V+vA2OIDAke3svSs6n0kyceqcI/RFY3FiSnDvZVeR2RxJXGVmkw vTEWB4SA==; Received: from 91-158-25-70.elisa-laajakaista.fi ([91.158.25.70] helo=toshino.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nqWTf-0005fd-2o; Mon, 16 May 2022 11:53:19 +0300 From: cyndis@kapsi.fi To: thierry.reding@gmail.com, jonathanh@nvidia.com, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, robh+dt@kernel.org, krzysztof.kozlowski@canonical.com Subject: [PATCH v5 7/9] drm/tegra: falcon: Set DMACTX field on DMA transactions Date: Mon, 16 May 2022 11:52:56 +0300 Message-Id: <20220516085258.1227691-8-cyndis@kapsi.fi> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516085258.1227691-1-cyndis@kapsi.fi> References: <20220516085258.1227691-1-cyndis@kapsi.fi> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 91.158.25.70 X-SA-Exim-Mail-From: cyndis@kapsi.fi X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Mikko Perttunen , iommu@lists.linux-foundation.org, linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Mikko Perttunen The DMACTX field determines which context, as specified in the TRANSCFG register, is used. While during boot it doesn't matter which is used, later on it matters and this value is reused by the firmware. Signed-off-by: Mikko Perttunen --- drivers/gpu/drm/tegra/falcon.c | 8 ++++++++ drivers/gpu/drm/tegra/falcon.h | 1 + 2 files changed, 9 insertions(+) diff --git a/drivers/gpu/drm/tegra/falcon.c b/drivers/gpu/drm/tegra/falcon.c index 3762d87759d9..c0d85463eb1a 100644 --- a/drivers/gpu/drm/tegra/falcon.c +++ b/drivers/gpu/drm/tegra/falcon.c @@ -48,6 +48,14 @@ static int falcon_copy_chunk(struct falcon *falcon, if (target == FALCON_MEMORY_IMEM) cmd |= FALCON_DMATRFCMD_IMEM; + /* + * Use second DMA context (i.e. the one for firmware). Strictly + * speaking, at this point both DMA contexts point to the firmware + * stream ID, but this register's value will be reused by the firmware + * for later DMA transactions, so we need to use the correct value. + */ + cmd |= FALCON_DMATRFCMD_DMACTX(1); + falcon_writel(falcon, offset, FALCON_DMATRFMOFFS); falcon_writel(falcon, base, FALCON_DMATRFFBOFFS); falcon_writel(falcon, cmd, FALCON_DMATRFCMD); diff --git a/drivers/gpu/drm/tegra/falcon.h b/drivers/gpu/drm/tegra/falcon.h index c56ee32d92ee..1955cf11a8a6 100644 --- a/drivers/gpu/drm/tegra/falcon.h +++ b/drivers/gpu/drm/tegra/falcon.h @@ -50,6 +50,7 @@ #define FALCON_DMATRFCMD_IDLE (1 << 1) #define FALCON_DMATRFCMD_IMEM (1 << 4) #define FALCON_DMATRFCMD_SIZE_256B (6 << 8) +#define FALCON_DMATRFCMD_DMACTX(v) (((v) & 0x7) << 12) #define FALCON_DMATRFFBOFFS 0x0000111c