From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1C6EFC282CB for ; Tue, 5 Feb 2019 06:43:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E642A2080D for ; Tue, 5 Feb 2019 06:43:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727975AbfBEGne (ORCPT ); Tue, 5 Feb 2019 01:43:34 -0500 Received: from mailgw01.mediatek.com ([210.61.82.183]:55634 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1727966AbfBEGne (ORCPT ); Tue, 5 Feb 2019 01:43:34 -0500 X-UUID: 238a2f9dd4114cc38d4a692ce5b2f48e-20190205 X-UUID: 238a2f9dd4114cc38d4a692ce5b2f48e-20190205 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1622095840; Tue, 05 Feb 2019 14:43:24 +0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by mtkmbs03n2.mediatek.inc (172.21.101.182) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 5 Feb 2019 14:43:16 +0800 Received: from mtkslt306.mediatek.inc (10.21.14.136) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Tue, 5 Feb 2019 14:43:16 +0800 From: Frederic Chen To: , , , , CC: , , , , , , , , , , , , , Subject: [RFC PATCH V0 1/7] [media] dt-bindings: mt8183: Add binding for ISP Pass 1 shared memory Date: Tue, 5 Feb 2019 14:42:40 +0800 Message-ID: <1549348966-14451-2-git-send-email-frederic.chen@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1549348966-14451-1-git-send-email-frederic.chen@mediatek.com> References: <1549348966-14451-1-git-send-email-frederic.chen@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-TM-SNTS-SMTP: 71D25D377E8559684CD0A7C4FAE049DD288B7706DB62CB8DF3F5F8E9012CD7052000:8 X-MTK: N Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org This patch adds the binding for describing the shared memory used to exchange configuration and tuning data between the co-processor and Pass 1 (P1) unit of the camera ISP system on Mediatek SoCs. Signed-off-by: Frederic Chen --- .../mediatek,reserve-memory-cam_smem.txt | 44 ++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-cam_smem.txt diff --git a/Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-cam_smem.txt b/Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-cam_smem.txt new file mode 100644 index 0000000..05c1bf1 --- /dev/null +++ b/Documentation/devicetree/bindings/reserved-memory/mediatek,reserve-memory-cam_smem.txt @@ -0,0 +1,44 @@ +Mediatek ISP Pass 1 Shared Memory binding + +This binding describes the shared memory, which serves the purpose of +describing the shared memory region used to exchange data between Pass 1 +unit of Image Signal Processor (ISP) and the co-processor in Mediatek +SoCs. + +The co-processor doesn't have the iommu so we need to use the physical +address to access the shared buffer in the firmware. + +The Pass 1 unit of ISP can access memory through the iommu so it +uses the dma address to access the memory region. +(See iommu/mediatek,iommu.txt for the detailed description of Mediatek IOMMU) + + +Required properties: + +- compatible: must be "mediatek,reserve-memory-cam_smem" + +- reg: required for static allocation (see reserved-memory.txt for + the detailed usage) + +- alloc-range: required for dynamic allocation. The range must + between 0x00000400 and 0x100000000 due to the co-processer's + addressing limitation + +- size: required for dynamic allocation. The unit is bytes. + + +Example: + +The following example shows the ISP Pass1 shared memory setup for MT8183. + + reserved-memory { + #address-cells = <2>; + #size-cells = <2>; + ranges; + reserve-memory-cam_smem { + compatible = "mediatek,reserve-memory-cam_smem"; + size = <0 0x1400000>; + alignment = <0 0x1000>; + alloc-ranges = <0 0x40000000 0 0x50000000>; + }; + }; -- 1.9.1