From patchwork Wed Jan 20 16:44:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dafna Hirschfeld X-Patchwork-Id: 12032881 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BC35BC433E6 for ; Wed, 20 Jan 2021 16:45:07 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 78B6123358 for ; Wed, 20 Jan 2021 16:45:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 78B6123358 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=collabora.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:MIME-Version:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:References:In-Reply-To:Message-Id:Date:Subject:To: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=qoTwDu+wEQhkK8oPZ9Noygd/foFwGwHwZ1Xbwu4Uu0w=; b=khdYA5txThRhNJXF5M7eoRtM6a yOCTSQuWmrXHS5Gd3zAFyS98GJSbId7s1rTkgpYc7QvuzFgtiMe0LviOkUBIywH40gB/LXL2O/Wg1 AElS0yQG+HPAq1jTBI9ZnBSbiOogxXGeaj4sqHLf3ef2q1k/M1qRK3Yirso9BRTWQkXzqzTsI2UFN aiaoi9vmqCoHOCfnlxZznsfaP8PnnQZAjYHnW+G9xv9Zw34qkKvlVeZwC+vAZIkLsX/nlrSdUIJQB D5U69kijpneYgRetLbBQeUKbEOLWwr0/k9V/rZBZuHe2G7dhyFfr/QHMttDcAyVKqaUVRK4YxP6+C mR155dcQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l2GbQ-0004zA-9n; Wed, 20 Jan 2021 16:45:04 +0000 Received: from bhuna.collabora.co.uk ([46.235.227.227]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l2GbL-0004vO-QC for linux-rockchip@lists.infradead.org; Wed, 20 Jan 2021 16:45:01 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: dafna) with ESMTPSA id 3E1631F44FA7 From: Dafna Hirschfeld To: linux-media@vger.kernel.org, heiko.stuebner@theobroma-systems.com, heiko@sntech.de Subject: [PATCH v7 1/5] media: rkisp1: uapi: change hist_bins array type from __u16 to __u32 Date: Wed, 20 Jan 2021 17:44:42 +0100 Message-Id: <20210120164446.1220-2-dafna.hirschfeld@collabora.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210120164446.1220-1-dafna.hirschfeld@collabora.com> References: <20210120164446.1220-1-dafna.hirschfeld@collabora.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210120_114459_962762_74003D92 X-CRM114-Status: UNSURE ( 9.79 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mchehab@kernel.org, dafna.hirschfeld@collabora.com, dafna3@gmail.com, tfiga@chromium.org, hverkuil@xs4all.nl, linux-rockchip@lists.infradead.org, helen.koike@collabora.com, laurent.pinchart@ideasonboard.com, sakari.ailus@linux.intel.com, kernel@collabora.com, ezequiel@collabora.com MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org Each entry in the array is a 20 bits value composed of 16 bits unsigned integer and 4 bits fractional part. So the type should change to __u32. In addition add a documentation of how the measurements are done. Signed-off-by: Dafna Hirschfeld --- include/uapi/linux/rkisp1-config.h | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/include/uapi/linux/rkisp1-config.h b/include/uapi/linux/rkisp1-config.h index 6e449e784260..f75f8d698fb4 100644 --- a/include/uapi/linux/rkisp1-config.h +++ b/include/uapi/linux/rkisp1-config.h @@ -844,13 +844,17 @@ struct rkisp1_cif_isp_af_stat { /** * struct rkisp1_cif_isp_hist_stat - statistics histogram data * - * @hist_bins: measured bin counters + * @hist_bins: measured bin counters. Each bin is a 20 bits unsigned fixed point type. + * Bits 0-4 are the fractional part and bits 5-19 are the integer part. * - * Measurement window divided into 25 sub-windows, set - * with ISP_HIST_XXX + * The window of the measurements area is divided to 5x5 sub-windows. The histogram + * is then computed for each sub-window independently and the final result is a weighted + * average of the histogram measurements on all sub-windows. + * The window of the measurements area and the weight of each sub-window are configurable + * using struct @rkisp1_cif_isp_hst_config. */ struct rkisp1_cif_isp_hist_stat { - __u16 hist_bins[RKISP1_CIF_ISP_HIST_BIN_N_MAX]; + __u32 hist_bins[RKISP1_CIF_ISP_HIST_BIN_N_MAX]; }; /**