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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 3BE67C47DDB for ; Tue, 23 Jan 2024 08:30:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=2HZ58rf2nhs/S8PCglLF/9glXXbqjcQUniX9DVCdXgU=; b=UzTzTZ2NNp2Rfd BrcUAmBzuEbgL9jAmpNYws8QRCN1iheV8zn92vPpN0XsdmCM3A7/iFB0BAcpqYkinDgqUUhuHRmuF XgL/9mGTDAHlsePqRyZ1u+zfes/7UpXF6UNgbATq+zp9Hjqb+jV1NoezjP2cQcspT3roj1RdRupBB fHb+tJ71Qqoe9FD5yhLGBCsq7hWAueq05t6nE/eZbtdJNCdpqZy3oE1uP+13gx2P8ce4ZYk7dp/Li vGzjAB0XXkIKLan1/j7zDMghlSsHc3VnSe7kJpvW5QE8OgqlxJHqGlFhtEyxnI0gMVwsejlaCjjUm ZzmdVY0RXi8uPDB1oSgA==; 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charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, On 16/01/2024 15:41, Devarsh Thakkar wrote: > This overlay needs to be used with display sharing supported device > manager firmware only. > > Remote core running this firmware has write access to "common" register > space, VIDL pipeline, OVR1 overlay and VP1 videoport. > > The processing core running Linux is provided write access to VID > pipeline and "common1" register space. > > The VP1 video port is shared between Linux and remote core with remote > core configuring the overlay manager to set Zorder 1 for VID pipeline > and Zorder 2 for VIDL pipeline. > > Add reserved memory region for framebuffer region used by remote core in > dss shared mode overlay file so that Linux does not re-use the same > while allocating memory. I don't understand this one. Why is RAM used by RTOS accessible by Linux in the first place? Tomi > Also add a label for reserved memory region in base device-tree file so > that it can be referred back in overlay file. > > Signed-off-by: Devarsh Thakkar > --- > arch/arm64/boot/dts/ti/Makefile | 1 + > .../arm64/boot/dts/ti/k3-am62x-sk-common.dtsi | 2 +- > .../dts/ti/k3-am62x-sk-dss-shared-mode.dtso | 33 +++++++++++++++++++ > 3 files changed, 35 insertions(+), 1 deletion(-) > create mode 100644 arch/arm64/boot/dts/ti/k3-am62x-sk-dss-shared-mode.dtso > > diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile > index 52c1dc910308..ff832741b367 100644 > --- a/arch/arm64/boot/dts/ti/Makefile > +++ b/arch/arm64/boot/dts/ti/Makefile > @@ -35,6 +35,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am62x-sk-csi2-ov5640.dtbo > dtb-$(CONFIG_ARCH_K3) += k3-am62x-sk-csi2-tevi-ov5640.dtbo > dtb-$(CONFIG_ARCH_K3) += k3-am62x-sk-csi2-imx219.dtbo > dtb-$(CONFIG_ARCH_K3) += k3-am62x-sk-hdmi-audio.dtbo > +dtb-$(CONFIG_ARCH_K3) += k3-am62x-sk-dss-shared-mode.dtbo > > # Boards with AM64x SoC > dtb-$(CONFIG_ARCH_K3) += k3-am642-evm.dtb > diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi > index 33768c02d8eb..8b55ca10102f 100644 > --- a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi > @@ -34,7 +34,7 @@ memory@80000000 { > reg = <0x00000000 0x80000000 0x00000000 0x80000000>; > }; > > - reserved-memory { > + reserved_memory: reserved-memory { > #address-cells = <2>; > #size-cells = <2>; > ranges; > diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-dss-shared-mode.dtso b/arch/arm64/boot/dts/ti/k3-am62x-sk-dss-shared-mode.dtso > new file mode 100644 > index 000000000000..02153748a5c2 > --- /dev/null > +++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-dss-shared-mode.dtso > @@ -0,0 +1,33 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/** > + * DT overlay to enable display sharing mode for AM62P DSS0 > + * This is compatible with custom AM62 Device Manager firmware > + * > + * Copyright (C) 2023 Texas Instruments Incorporated - http://www.ti.com/ > + */ > + > +/dts-v1/; > +/plugin/; > + > +#include > +#include > + > +&dss0 { > + ti,dss-shared-mode; > + ti,dss-shared-mode-vp = "vp1"; > + ti,dss-shared-mode-vp-owned = <0>; > + ti,dss-shared-mode-common = "common1"; > + ti,dss-shared-mode-planes = "vid"; > + ti,dss-shared-mode-plane-zorder = <0>; > + interrupts = ; > +}; > + > +&reserved_memory { > + #address-cells = <2>; > + #size-cells = <2>; > + rtos_framebuffer_memory_region: rtos-framebuffer-memory@94800000 { > + compatible = "shared-dma-pool"; > + reg = <0x00 0x94800000 0x00 0x08000000>; > + no-map; > + }; > +}; _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel