From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 E68D21549F for ; Mon, 8 May 2023 09:59:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5140CC433D2; Mon, 8 May 2023 09:59:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1683539945; bh=4ngTJHEdLTp5JOrdxidl45jKuAvCEobKeDe6zjsNZlk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RVJqRMLWppeHhS0tlOm1CwWoUQoDspdGdITTAWhOmJIVQHPdxqDr0PrfbEib0TO5Z Y5vCa+YlqPCXZqIFmehHnj90KL6/yW5k0HVRGV0rdtYmXIvBrzgc57EYdawJ+COAmh Sm8+S5qltmBlEP65QlisGN61JUwbDKSzGxaKrIa0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "H. Nikolaus Schaller" , Andreas Kemnade , Tony Lindgren , Sasha Levin Subject: [PATCH 6.1 189/611] ARM: dts: gta04: fix excess dma channel usage Date: Mon, 8 May 2023 11:40:31 +0200 Message-Id: <20230508094428.514798530@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230508094421.513073170@linuxfoundation.org> References: <20230508094421.513073170@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: H. Nikolaus Schaller [ Upstream commit a622310f7f0185da02e42cdb06475f533efaae60 ] OMAP processors support 32 channels but there is no check or inspect this except booting a device and looking at dmesg reports of not available channels. Recently some more subsystems with DMA (aes1+2) were added filling the list of dma channels beyond the limit of 32 (even if other parameters indicate 96 or 128 channels). This leads to random subsystem failures i(e.g. mcbsp for audio) after boot or boot messages that DMA can not be initialized. Another symptom is that /sys/kernel/debug/dmaengine/summary has 32 entries and does not show all required channels. Fix by disabling unused (on the GTA04 hardware) mcspi1...4. Each SPI channel allocates 4 DMA channels rapidly filling the available ones. Disabling unused SPI modules on the OMAP3 SoC may also save some energy (has not been checked). Fixes: c312f066314e ("ARM: dts: omap3: Migrate AES from hwmods to sysc-omap2") Signed-off-by: H. Nikolaus Schaller [re-enabled aes2, improved commit subject line] Signed-off-by: Andreas Kemnade Message-Id: <20230113211151.2314874-1-andreas@kemnade.info> Signed-off-by: Tony Lindgren Signed-off-by: Sasha Levin --- arch/arm/boot/dts/omap3-gta04.dtsi | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/arm/boot/dts/omap3-gta04.dtsi b/arch/arm/boot/dts/omap3-gta04.dtsi index 28a6a9345be52..2dbee248a126f 100644 --- a/arch/arm/boot/dts/omap3-gta04.dtsi +++ b/arch/arm/boot/dts/omap3-gta04.dtsi @@ -612,6 +612,22 @@ clock-frequency = <100000>; }; +&mcspi1 { + status = "disabled"; +}; + +&mcspi2 { + status = "disabled"; +}; + +&mcspi3 { + status = "disabled"; +}; + +&mcspi4 { + status = "disabled"; +}; + &usb_otg_hs { interface-type = <0>; usb-phy = <&usb2_phy>; -- 2.39.2