From patchwork Tue Mar 8 03:38:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arec Kao X-Patchwork-Id: 549560 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 90E9BC433EF for ; Tue, 8 Mar 2022 02:22:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244844AbiCHCXC (ORCPT ); Mon, 7 Mar 2022 21:23:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50984 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236987AbiCHCXB (ORCPT ); Mon, 7 Mar 2022 21:23:01 -0500 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5ACDC3205C for ; Mon, 7 Mar 2022 18:22:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1646706126; x=1678242126; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=BP/dvF4ZWDFHeivaxs9+jEcGT80/HvrcLnMInC68fzc=; b=kWja9DjEBgK4Z7nivSsKr6KChg7Ik8s+KiP5PaZJae8kfaU/Bx54SHRh RCGlcB9e4XvPJhsPaK2pQ7I4NFV5yWwbCRQF58jnqm0Mf5hJwgpkyPiiE ATAp9tAtYdH9UdvDnDgyAWQY+rdOapHWJ5SoaF5hvIQ1UYIvY9/mmMdtZ 9pf9peNqG9XzeGNlZ/JNiHK+t0USWx9sNLTV9DY0CwyF6cbAI5GnJVzur cu2hfhRQXUEdfgfREQ82nrPeZ3m37Mbu39BxUL1busby9DBiLYb+xydz9 q/1MJS/qv/jL+jxMFTMIdqsEdmSqnxDvx3RQwnIupqhnqE7HJzGlL9g7o Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10279"; a="254507612" X-IronPort-AV: E=Sophos;i="5.90,163,1643702400"; d="scan'208";a="254507612" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Mar 2022 18:22:05 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,163,1643702400"; d="scan'208";a="711356447" Received: from arec-bm6650.itwn.intel.com ([10.5.253.20]) by orsmga005.jf.intel.com with ESMTP; 07 Mar 2022 18:22:04 -0800 From: Arec Kao To: linux-media@vger.kernel.org Cc: sakari.ailus@linux.intel.com, andy.yeh@intel.com, tfiga@google.com, arec.kao@intel.com Subject: [PATCH 2/2] Re-run BLC when gain change Date: Tue, 8 Mar 2022 11:38:39 +0800 Message-Id: <20220308033839.3773-2-arec.kao@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220308033839.3773-1-arec.kao@intel.com> References: <20220308033839.3773-1-arec.kao@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Changing the gain affects the black-level through the device; the gain should therefore not be changed during a BLC procedure. If the gain changes, then the BLC routine should be re-run in some scenarios. Signed-off-by: Arec Kao --- .../userspace-api/media/v4l/ext-ctrls-image-source.rst | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-image-source.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-image-source.rst index 71f23f131f97..5ee53ba76d46 100644 --- a/Documentation/userspace-api/media/v4l/ext-ctrls-image-source.rst +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-image-source.rst @@ -59,6 +59,11 @@ Image Source Control IDs non-sensitive. This control is required for automatic calibration of sensors/cameras. +``V4L2_CID_BLC (integer)`` + Changing the gain affects the black-level through the device; the gain + should therefore not be changed during a BLC procedure. If the gain + changes, the BLC routine should be re-run in some scenarios. + .. c:type:: v4l2_area .. flat-table:: struct v4l2_area