From patchwork Mon Jan 22 03:02:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Chen, Jason Z" X-Patchwork-Id: 98719 X-Patchwork-Delegate: sakari.ailus@iki.fi Received: from ny.mirrors.kernel.org ([147.75.199.223]) by www.linuxtv.org with esmtp (Exim 4.96) (envelope-from ) id 1rRkbZ-0004yx-16 for patchwork@linuxtv.org; Mon, 22 Jan 2024 03:04:10 +0000 Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ny.mirrors.kernel.org (Postfix) with ESMTPS id 4D3681C2205A for ; Mon, 22 Jan 2024 03:04:08 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 281AF1370; Mon, 22 Jan 2024 03:03:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="S8zpwc8q" X-Original-To: linux-media@vger.kernel.org Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (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 3C5236AD7 for ; Mon, 22 Jan 2024 03:03:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705892589; cv=none; b=GHmvGVf/Na2/QbFC1IfaiwdVAFqtBZGIkOoPLiAprBGZpuff9biq6cylMg9UTu5yck8bDyUKD5bFrgABtGM+4VCBmby9zOMsPrzCMFKIR8ZwqzaP7u2RUFF8gMWLjA8z1uYFEPu6llTxFL6Y7bLEMhtC04NqVxDLg0WKFZ2z39M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705892589; c=relaxed/simple; bh=oTAONWnfUiOJDtXZYULuS8SRBwS/9DbjAucflNEujoQ=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=JCKJ6NjFzWI7fz/A6o4YO6CaOM7oq9M1ubspcKO2cUjoE0890l05HpnOnHSVVA1A0NPdGnKd4FdvxLi7qlKKbYdrC/vCJNqNcpVphKnGLlki5jQrERzkHxMUciZt854dWmhBLI2t+T1QnXE+nEK7+4OLREXYE3G+eo3x0ue2ZSU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=S8zpwc8q; arc=none smtp.client-ip=198.175.65.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1705892589; x=1737428589; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=oTAONWnfUiOJDtXZYULuS8SRBwS/9DbjAucflNEujoQ=; b=S8zpwc8q+k3RuYjB226e1PcTe6HGFx9dfq1w+sBBSrB42nKxn+tWyX5w Yj6AGT0TP0Drr317Rwe85sj9w0vRylsIpE3K8G4OHRilaj2SwQfRtJBWN PRwaJ7OuyuvbJ9vOFEk96xRBvDKo9nRKmckVVZGYW2uJGb4rm2GiYufH9 lG2SPlAt34Ehz+aiW5g+MXnVsukYh3OcoADHBuhT5ZRmnprzqLdCrvSaJ Qt2/U/Hvh5feFwYzhLdsz9/Z9gUxYLTgsvjqH2F0qsDqJv2Xkb1ZeEuIs S25rp1pOTgbOiFdnm3e6wGNgjv1J1P87akwdQSTOK6mHsL9LPS5a1DtCi Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10960"; a="7768105" X-IronPort-AV: E=Sophos;i="6.05,211,1701158400"; d="scan'208";a="7768105" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Jan 2024 19:03:08 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10960"; a="761609263" X-IronPort-AV: E=Sophos;i="6.05,211,1701158400"; d="scan'208";a="761609263" Received: from jasonz-ms-7d25.itwn.intel.com ([10.227.107.10]) by orsmga006.jf.intel.com with ESMTP; 21 Jan 2024 19:03:05 -0800 From: "Chen, Jason Z" To: linux-media@vger.kernel.org Cc: sakari.ailus@linux.intel.com, andy.yeh@intel.com, kieran.bingham@ideasonboard.com, qingwu.zhang@intel.com, bingbu.cao@linux.intel.com, Jason Chen Subject: [PATCH v2] media: ov08x40: Add Signal Integration Adjustments for specific project Date: Mon, 22 Jan 2024 11:02:20 +0800 Message-Id: <20240122030220.3009357-1-jason.z.chen@intel.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-LSpam-Score: -4.0 (----) X-LSpam-Report: No, score=-4.0 required=5.0 tests=ARC_SIGNED=0.001,ARC_VALID=-0.1,DKIMWL_WL_HIGH=-1,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,DMARC_PASS=-0.001,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1,RCVD_IN_DNSWL_MED=-2.3,SPF_HELO_NONE=0.001,SPF_PASS=-0.001 autolearn=ham autolearn_force=no From: Jason Chen Due to certain MIPI hardware designs using overly long cables, there is a loss of signal strength, resulting in failed signal integration. The patch includes changes to adjust the driving strength in the register settings for a specific project. Signed-off-by: Jason Chen --- drivers/media/i2c/ov08x40.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/media/i2c/ov08x40.c b/drivers/media/i2c/ov08x40.c index 520ccd4aecf..ddcb4b6848b 100644 --- a/drivers/media/i2c/ov08x40.c +++ b/drivers/media/i2c/ov08x40.c @@ -160,6 +160,18 @@ static const struct ov08x40_reg mipi_data_rate_800mbps[] = { {0x6002, 0x2e}, }; +static const struct ov08x40_reg mipi_si_changed_regs[] = { + {0x481b, 0x2c}, /* HS Exit: Data Tx TEOT - reducing 8ns */ + {0x4826, 0x42}, /* HS Entry: Data Tx TREOT - raising 8ns */ + {0x4829, 0x54}, /* HS Exit: Data Tx TREOT - reducing 8ns */ + {0x4885, 0x1f}, /* driving strength change */ +}; + +struct ov08x40_reg_list si_regs = { + .regs = mipi_si_changed_regs, + .num_of_regs = ARRAY_SIZE(mipi_si_changed_regs), +}; + static const struct ov08x40_reg mode_3856x2416_regs[] = { {0x5000, 0x5d}, {0x5001, 0x20}, @@ -2913,6 +2925,9 @@ static int ov08x40_start_streaming(struct ov08x40 *ov08x) return ret; } + /* Apply SI change to current project */ + ov08x40_write_reg_list(ov08x, &si_regs); + /* Apply default values of current mode */ reg_list = &ov08x->cur_mode->reg_list; ret = ov08x40_write_reg_list(ov08x, reg_list);