From nobody Thu Feb 12 10:53:46 2026 Received: from fllv0015.ext.ti.com (fllv0015.ext.ti.com [198.47.19.141]) (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 925D21474A8; Thu, 13 Jun 2024 15:09:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.47.19.141 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718291354; cv=none; b=WW/Ycrx/X8KRg/NLQFOTy+BJ4DpEVwDnL23EG4FtU2OWxCabTK75+PXKMiPdSQN+zgkT13z9FdPDr5OShZ2s+9K+sSc68mue9lkWQ80nLZP9SbO2XoFl2zyXVXK2LlGAfNlzPjnvt9B1q6VLEMnPmNCdHwe2NJeabZ3bBcUxg+g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718291354; c=relaxed/simple; bh=5yUqq95OEzg8Vg07j3JEbfDJgM9RTXqe4IOXvDeb6BE=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=iBopqKJg9lP9S8gzSpYcF7LDFlh92cSm723n18y1daIikNTRyAQakX/nVcbaiftAIXYMKbCPzmW8Zcfv4RjTyZ91IcW9IN/vwXMoEiVujn8lnIpDxZh7dcb7o5CvGWaKJSno4ESYknu+M3BQVzpDk1cx3YyfMV9WpyKYGPEYMis= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com; spf=pass smtp.mailfrom=ti.com; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b=T0BVL1PL; arc=none smtp.client-ip=198.47.19.141 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ti.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="T0BVL1PL" Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 45DF95dq130716; Thu, 13 Jun 2024 10:09:05 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1718291345; bh=+JRL1+N5yaYXTkwzYeHn0V3MvWD0ajIJEVtzSMxbctA=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=T0BVL1PLhIXhdS9vMsWMg5hZJlZZwW+BBCaDWaUi8CE7X5kjO07RY434+Alb534Ry T5G7vfLHkmwGZZf96FB+ua8eLnURmiE5cdV8ki/Mh07ueWXqRl63J+EqQ4oT2X6tHQ X+v6VQu2NtyPMOPhWvnVq5lqUKo7aSWw4X6z/m+M= Received: from DFLE108.ent.ti.com (dfle108.ent.ti.com [10.64.6.29]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 45DF95hs029220 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 13 Jun 2024 10:09:05 -0500 Received: from DFLE103.ent.ti.com (10.64.6.24) by DFLE108.ent.ti.com (10.64.6.29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23; Thu, 13 Jun 2024 10:09:05 -0500 Received: from lelvsmtp6.itg.ti.com (10.180.75.249) by DFLE103.ent.ti.com (10.64.6.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.23 via Frontend Transport; Thu, 13 Jun 2024 10:09:05 -0500 Received: from localhost (ti.dhcp.ti.com [172.24.227.95] (may be forged)) by lelvsmtp6.itg.ti.com (8.15.2/8.15.2) with ESMTP id 45DF94Eh020670; Thu, 13 Jun 2024 10:09:05 -0500 From: Devarsh Thakkar To: , , , , , , , , CC: , , , , , , , Subject: [PATCH 1/3] arm64: dts: ti: k3-am62x-sk-common: Reserve 128MiB of global CMA Date: Thu, 13 Jun 2024 20:39:00 +0530 Message-ID: <20240613150902.2173582-2-devarsht@ti.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20240613150902.2173582-1-devarsht@ti.com> References: <20240613150902.2173582-1-devarsht@ti.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Content-Type: text/plain; charset="utf-8" Reserve 128MiB of global CMA which is also marked as re-usable so that OS can also use the same if peripheral drivers are not using the same. AM62x supports multimedia components such as GPU, dual Display and Camera. Assuming the worst-case scenario where all 3 are run in parallel below is the calculation : 1) OV5640 camera sensor supports 1920x1080 resolution -> 1920 width x 1080 height x 2 bytesperpixel x 8 buffers (default in yavta) : 32MiB 2) 1920x1200 Microtips LVDS panel supported -> 1920 width x 1080 height x 4 bytesperpixel x 2 buffers : 16 MiB 3) 1920x1080 HDMI display supported -> 1920 width x 1080 height x 4 bytesperpixel x 2 buffers : 15.82 MiB which is ~16 MiB 4) IMG GPU shares with display allocated buffers while rendering but in case some dedicated operation viz color conversion, keeping same window of ~16 MiB for GPU too. Total is 80 MiB and adding 32 MiB for other peripherals and extra 16 MiB to keep as buffer for fragmentation thus rounding total to 128 MiB. Signed-off-by: Devarsh Thakkar --- arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi b/arch/arm64/bo= ot/dts/ti/k3-am62x-sk-common.dtsi index f4948b937627..52231bfe60fe 100644 --- a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi @@ -48,6 +48,14 @@ ramoops@9ca00000 { pmsg-size =3D <0x8000>; }; =20 + /* global cma region */ + linux,cma { + compatible =3D "shared-dma-pool"; + reusable; + size =3D <0x00 0x8000000>; + linux,cma-default; + }; + secure_tfa_ddr: tfa@9e780000 { reg =3D <0x00 0x9e780000 0x00 0x80000>; alignment =3D <0x1000>; --=20 2.39.1