From patchwork Fri Sep 14 14:26:51 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kieran Bingham X-Patchwork-Id: 52051 Received: from vger.kernel.org ([209.132.180.67]) by www.linuxtv.org with esmtp (Exim 4.84_2) (envelope-from ) id 1g0p3u-00030q-NU; Fri, 14 Sep 2018 14:27:11 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727946AbeINTlm (ORCPT + 1 other); Fri, 14 Sep 2018 15:41:42 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:36668 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726908AbeINTlm (ORCPT ); Fri, 14 Sep 2018 15:41:42 -0400 Received: from localhost.localdomain (cpc89242-aztw30-2-0-cust488.18-1.cable.virginm.net [86.31.129.233]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id C7A87CE; Fri, 14 Sep 2018 16:26:55 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1536935216; bh=7MfsDesTjVez73NwLIuRR/scBqN5BqWU1jj1aRqEU1s=; h=From:To:Cc:Subject:Date:From; b=DtSqydizGTEE0a5ViZSj3ItuWqziSa/K8puCn0/G77hj5UvqHwo96fG7PvdMznQWg IG/gSPFurJ5vQlEFVa7lRgjaDAiJkmri7peMmcD74OKj/wsoCDrt0nrWh10cfnILRD h6LcLHsz9tmNPSq6jlgHy3QP4+151CO0RWcBCr4U= From: Kieran Bingham To: Laurent Pinchart , mchehab@kernel.org Cc: linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Kieran Bingham , Kieran Bingham Subject: [PATCH v2 1/2] media: vsp1: Document max_width restriction on SRU Date: Fri, 14 Sep 2018 15:26:51 +0100 Message-Id: <20180914142652.30484-1-kieran.bingham+renesas@ideasonboard.com> X-Mailer: git-send-email 2.17.1 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The SRU is currently restricted to 256 pixels as part of the current partition algorithm. Document that the actual capability of this component is 288 pixels, but don't increase the implementation. The extended partition algorithm may later choose to utilise a larger input to support overlapping partitions which will improve the quality of the output images. Signed-off-by: Kieran Bingham Reviewed-by: Laurent Pinchart --- drivers/media/platform/vsp1/vsp1_sru.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/media/platform/vsp1/vsp1_sru.c b/drivers/media/platform/vsp1/vsp1_sru.c index d216707f64c9..19f91eb81134 100644 --- a/drivers/media/platform/vsp1/vsp1_sru.c +++ b/drivers/media/platform/vsp1/vsp1_sru.c @@ -314,6 +314,11 @@ static unsigned int sru_max_width(struct vsp1_entity *entity, output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config, SRU_PAD_SOURCE); + /* + * The maximum input width of the SRU is 288 input pixels, but 32 + * pixels are reserved to support overlapping partition windows when + * scaling. + */ if (input->width != output->width) return 512; else