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 202035993F; Thu, 21 Dec 2023 16:30:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="d0F3lHrS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1F601C433C9; Thu, 21 Dec 2023 16:30:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1703176228; bh=qiAu0Z0L+6zSRjJdFQmQuvjQA8bxbqa0s5rr0Z170HM=; h=From:To:Cc:In-Reply-To:References:Subject:Date:From; b=d0F3lHrSa+1DC/9Cm0Rhwa/iDr/wKJJ2fuL7brT8jdw+qWk3INt1jQ09ILPWcrZXy yHNp3DfbRZdom05U9fHKwjcelmFLtbbgeiXlwgv7lEXHYU1wjRkevRpwSakjh1PxGU DvWS601C6poivsiShGCsqdMTzxnrX2N/pZPBWcVylpflCBw4FHH6LVZkOsgfzW7dlu 2mDpSG0iga3nO0V9JlIkugR7VupNVnZlG8pncf7UXd0/21QljV8a0FZ073Rwesoffj /mkjtjE97ncDK5Wq6omFq+5eV+1Hn5GWwMZOENrJs0h/hYs9QIv+geb/75AFFVDETE cPEe1H4Qyauiw== From: Vinod Koul To: p.zabel@pengutronix.de, Bumyong Lee Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20231219055026.118695-1-bumyong.lee@samsung.com> References: <20231219055026.118695-1-bumyong.lee@samsung.com> Subject: Re: [PATCH] dmaengine: pl330: issue_pending waits until WFP state Message-Id: <170317622670.683420.3881501030324253538.b4-ty@kernel.org> Date: Thu, 21 Dec 2023 22:00:26 +0530 Precedence: bulk X-Mailing-List: dmaengine@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Mailer: b4 0.12.3 On Tue, 19 Dec 2023 14:50:26 +0900, Bumyong Lee wrote: > According to DMA-330 errata notice[1] 71930, DMAKILL > cannot clear internal signal, named pipeline_req_active. > it makes that pl330 would wait forever in WFP state > although dma already send dma request if pl330 gets > dma request before entering WFP state. > > The errata suggests that polling until entering WFP state > as workaround and then peripherals allows to issue dma request. > > [...] Applied, thanks! [1/1] dmaengine: pl330: issue_pending waits until WFP state commit: d114d3a096194fb2a9c3bedd7be6587b97610625 Best regards, -- ~Vinod