From patchwork Mon Aug 26 14:43:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 13777984 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 ED74618E059 for ; Mon, 26 Aug 2024 14:44:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724683443; cv=none; b=kuXOG1tIHpqNtPvkURcYni+Yzgo2lYclltf7RTfAPRJQeMbGmCksetBzpL3gujdXDhKQXSovwDW9Q40vZ/gaw05DSuBlTxgpH7svcCDMmcfXbzR/6pygqeOGKTdhuW+bvuePJ1EgSkfbcpknivuDagvWbGHhChAD3VRh9eH10BU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724683443; c=relaxed/simple; bh=vQlO3mY66Os0V65bNK1YqlpY0iqblqsawwRrKZDee/k=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=c5EbVcoBInnCoqesS0huCcA3ocESII+P3ro/Qffwd7Io6IjLNwE1HoAKNh2ywkIoFbp3v4XpZJkhV6IsJKFd+ImdObRpM/mw0cyBhEMqlCAVJG2HWqDiu7XG5XUNEN8CJRHxk40WwiiNfjl45Pck3Alx62Uzciok41mqWtsBXYA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=RPleQYOc; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="RPleQYOc" Received: from ideasonboard.com (mob-5-90-142-90.net.vodafone.it [5.90.142.90]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 1AA9C6CA; Mon, 26 Aug 2024 16:42:53 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1724683373; bh=vQlO3mY66Os0V65bNK1YqlpY0iqblqsawwRrKZDee/k=; h=From:To:Cc:Subject:Date:From; b=RPleQYOc6/4UkUlBr920JBnxNhstoOZ9U5r5h/DjJyzQIl6PORknvFjRCB7zTslgd emkY3vIx5rh83NZTA8JpGYOpMF2P1pg/k1miltjixFJ4tLdEtx3pUVzCcadlG6PiL9 MpmROdfy1Nz++eBrUP49zWRe0kMiWzJnQozItWkA= From: Jacopo Mondi To: Naushir Patuck , Nick Hollinghurst , David Plowman , Dave Stevenson , Laurent Pinchart Cc: Jacopo Mondi , linux-media@vger.kernel.org Subject: [PATCH 0/4] media: pisp-be: Split jobs creation and scheduling Date: Mon, 26 Aug 2024 16:43:33 +0200 Message-ID: <20240826144338.463683-1-jacopo.mondi@ideasonboard.com> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 v1->v2: - Add two patches to address Laurent's comments separately - use scoped_guard() when possible - Add patch to fix runtime_pm imbalance Currently the 'pispbe_schedule()' function does two things: 1) Tries to assemble a job by inspecting all the video node queues to make sure all the required buffers are available 2) Submit the job to the hardware The pispbe_schedule() function is called at: - video device start_streaming() time - video device qbuf() time - irq handler As assembling a job requires inspecting all queues, it is a rather time consuming operation which is better not run in IRQ context. To avoid executing the time consuming job creation in interrupt context, split the job creation and job scheduling in two distinct operations. When a well-formed job is created, append it to the newly introduced 'pispbe->job_queue' where it will be dequeued from by the scheduling routine. At start_streaming() and qbuf() time immediately try to schedule a job if one has been created as the irq handler routine is only called when a job has completed, and we can't solely rely on it for scheduling new jobs. Jacopo Mondi (4): media: pisp_be: Drop reference to non-existing function media: pisp_be: Remove config validation from schedule() media: pisp-be: Split jobs creation and scheduling media: pisp_be: Fix pm_runtime underrun in probe .../platform/raspberrypi/pisp_be/pisp_be.c | 169 ++++++++++-------- 1 file changed, 92 insertions(+), 77 deletions(-) --- 2.45.2