From nobody Mon Feb 9 01:01:44 2026 Received: from srv01.abscue.de (abscue.de [89.58.28.240]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1A7CD2EBBBF; Tue, 22 Jul 2025 14:41:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=89.58.28.240 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753195315; cv=none; b=q6AGOBoVF58GWA56nExmsw926VEnHSQyekQMf/HZ3d1PK+p0Jt9yO97aC6zKgrxIEgtk5PIJVfCuGLJPoXbhjl5S88Onk9NUnwrxmWnOUREauEv6rmKGB67QylZ2gupcueqDHXoxVo89s8B41i2WMtZDoL0hOYzmgKI51cVpAgo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753195315; c=relaxed/simple; bh=Ev82jqwZV2jAuZD42PHmuYbopywGwmUQ530yBjB+MkY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Z7EXnRKqsJYoxv2CoPZ99zlpiF7E0acgRfevArh0UheN4F8FRXbjE3SgLFjFUMyiQ1gF6Y3BpMPsW00Xp9cSdcxP6XlJTpPuXAwKr2+fUnKh6mXJWCiI+IzQVmN/3wYpKJ0wZQBMeml3Vcbr3I3jRLb9tOkfF0kBqjop58fVdNk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=abscue.de; spf=pass smtp.mailfrom=abscue.de; arc=none smtp.client-ip=89.58.28.240 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=abscue.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=abscue.de Received: from srv01.abscue.de (localhost [127.0.0.1]) by spamfilter.srv.local (Postfix) with ESMTP id 2A4891C233A; Tue, 22 Jul 2025 16:41:45 +0200 (CEST) X-Spam-Level: Received: from fluffy-mammal.metal.fwg-cag.de (unknown [IPv6:2001:9e8:cdcb:3c00:ce39:8bff:5db4:1ef8]) by srv01.abscue.de (Postfix) with ESMTPSA id 53CEF1C07FA; Tue, 22 Jul 2025 16:41:44 +0200 (CEST) From: =?utf-8?q?Otto_Pfl=C3=BCger?= Date: Tue, 22 Jul 2025 16:41:15 +0200 Subject: [PATCH v2 13/15] drm: sprd: do not access IOMMU registers Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250722-ums9230-drm-v2-13-054276ec213d@abscue.de> References: <20250722-ums9230-drm-v2-0-054276ec213d@abscue.de> In-Reply-To: <20250722-ums9230-drm-v2-0-054276ec213d@abscue.de> To: David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Orson Zhai , Baolin Wang , Chunyan Zhang , Kevin Tang Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?Otto_Pfl=C3=BCger?= X-Mailer: b4 0.14.2 Changing the IOMMU registers results in conflicts with the sprd_iommu driver. Remove all references to IOMMU registers in the graphics driver. Signed-off-by: Otto Pfl=C3=BCger --- drivers/gpu/drm/sprd/sprd_dpu.c | 14 -------------- 1 file changed, 14 deletions(-) diff --git a/drivers/gpu/drm/sprd/sprd_dpu.c b/drivers/gpu/drm/sprd/sprd_dp= u.c index b946d015133db44d2d3d0b18803ed887b2b7ae2e..acf28de3fd08edaad03f01104f3= e6cc7c243123c 100644 --- a/drivers/gpu/drm/sprd/sprd_dpu.c +++ b/drivers/gpu/drm/sprd/sprd_dpu.c @@ -55,14 +55,6 @@ #define REG_DPI_H_TIMING 0x1F4 #define REG_DPI_V_TIMING 0x1F8 =20 -/* MMU control registers */ -#define REG_MMU_EN 0x800 -#define REG_MMU_VPN_RANGE 0x80C -#define REG_MMU_PPN1 0x83C -#define REG_MMU_RANGE1 0x840 -#define REG_MMU_PPN2 0x844 -#define REG_MMU_RANGE2 0x848 - /* Global control bits */ #define BIT_DPU_RUN BIT(0) #define BIT_DPU_STOP BIT(1) @@ -410,12 +402,6 @@ static void sprd_dpu_init(struct sprd_dpu *dpu) u32 dpu_version =3D readl(ctx->base + REG_DPU_VERSION); =20 writel(0x00, ctx->base + REG_BG_COLOR); - writel(0x00, ctx->base + REG_MMU_EN); - writel(0x00, ctx->base + REG_MMU_PPN1); - writel(0xffff, ctx->base + REG_MMU_RANGE1); - writel(0x00, ctx->base + REG_MMU_PPN2); - writel(0xffff, ctx->base + REG_MMU_RANGE2); - writel(0x1ffff, ctx->base + REG_MMU_VPN_RANGE); =20 if (ctx->if_type =3D=3D SPRD_DPU_IF_DPI) { /* use dpi as interface */ --=20 2.50.0