From patchwork Fri Nov 8 09:34:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 842248 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 476D01E47C1; Fri, 8 Nov 2024 09:35:27 +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=1731058529; cv=none; b=JlV0zGir/SD7tKEpOknm4K6zaBhVv60c/V9n/1OA26zcEQfIkz4TazdFZTqmnjjMjAm0Q0oi0XLPZXZGeBKOdS2SHXl4/nNQlD3YskGnVzGppS3i48tgmKYjoZtmKX1WqnL3hXGhjd72nHwIndMl8p9vziGoQ/jkHBJZ5vaA1sI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731058529; c=relaxed/simple; bh=4OfPIQt0zMS+sz9kFlchXcDE+D5zy5L6pKGSTiX11uc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=YxUgGfHlqOkjfUJM/W5UzE62HkN6hjeoAxrtwcd36BWvZfw8Q0S1COdFyugbGRX0rQHTwzWAyxhuDgAikqNkcTQmI2j5g5DKs7JqN8d/ZHfm2pVtjfS8RWFhix3jXLmdyCKRI7cPBxdXdoIbMXdld19UcywL4gYrMMXMDC3Auvs= 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=kz1YJWh8; 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="kz1YJWh8" Received: from [127.0.1.1] (91-157-155-49.elisa-laajakaista.fi [91.157.155.49]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 250E9193E; Fri, 8 Nov 2024 10:35:10 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1731058510; bh=4OfPIQt0zMS+sz9kFlchXcDE+D5zy5L6pKGSTiX11uc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=kz1YJWh8eWDGBrZWoME8sCvDjYZslZSKdCbtxxtuXyf645W7dznBvPZEta2dhMAGh ZjHKuplzmJIogVl0Zwy6nRlnDsHQdGyiQ5y/8JzjI0Rs76UIu7kBMMWLrcYpT3vOjV x6d9cOov0LJUgPQ5Z3Hz2s2mJmaDSaizK74pcrGA= From: Tomi Valkeinen Date: Fri, 08 Nov 2024 11:34:51 +0200 Subject: [PATCH v2 07/15] media: i2c: ds90ub960: Add support for I2C_RX_ID Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241108-ub9xx-fixes-v2-7-c7db3b2ad89f@ideasonboard.com> References: <20241108-ub9xx-fixes-v2-0-c7db3b2ad89f@ideasonboard.com> In-Reply-To: <20241108-ub9xx-fixes-v2-0-c7db3b2ad89f@ideasonboard.com> To: Mauro Carvalho Chehab , Sakari Ailus , Hans Verkuil , Andy Shevchenko Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Jai Luthra , Tomi Valkeinen X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2244; i=tomi.valkeinen@ideasonboard.com; h=from:subject:message-id; bh=4OfPIQt0zMS+sz9kFlchXcDE+D5zy5L6pKGSTiX11uc=; b=owEBbQKS/ZANAwAIAfo9qoy8lh71AcsmYgBnLdtPeSItwkurJvkmwYyL6atkrUnrD3ogsKlbq 2ehmSYL8CyJAjMEAAEIAB0WIQTEOAw+ll79gQef86f6PaqMvJYe9QUCZy3bTwAKCRD6PaqMvJYe 9VYND/9HFGUGOwsdNlI37fov5B2PNwjn/xFEtCRO/WM11AS2+pM7iTMBFPOKFG5VzE6SvrmFafd 2NoRzPlLjORo7cGOB7Zj9aDYGfS3zuaGTRYxaYdzNtPQSpaStE2Y/lUeHQBCEI2Z7pi3cjtmXPH KDrpiroPStIyaT9Ybtxgft46jlP0BfPLv0cEH1/jpIoNB6X2pK82q+xwNh93e62pNFY87kTe0dp 0lUqEhnlBFd1SAK9Msf12FxfhypBQYop6eTo9yhwJO50yaxej8scNiiOo7nFlYxDOmX0UNrpsFP az+kIhdnOspTmy3FzBcWqsb6nmHOTHEpwq8VZqwYVM9LJjFut0gRCZE7ufWx5Zk3R9mjEzf37AE xXLeVs971oKjWJvkhlu/WENs+aUbh49Ty/TnaEiPmU3M0lExFw4MzlSmi4+pdQZT22rnxUjRfje gPUlPlTnoIseng+O/uHJLMuQ1ynd7AoF+wHYXJklXW2C1uRoDNGIfgp1NbrA3Y6waMHI9BerFO6 SnxeqmTxWsSzQcrluiwZ4YFTZ8sM+KJh092UQKT2nzRahUnOaekNKBiWnHt3/WKnNYrjWIsiUN/ ZT0pAzY6KtJcRoaCFYbzx6S4eZn5PngTzwrqtUYNnzApu2AzLS6b/l0jFHryY4N+UMsIxluJzO5 YIZ1C55Gu+qvJYA== X-Developer-Key: i=tomi.valkeinen@ideasonboard.com; a=openpgp; fpr=C4380C3E965EFD81079FF3A7FA3DAA8CBC961EF5 Normally the driver accesses both the RX and the TX port registers via a paging mechanism: one register is used to select the page (i.e. the port), which dictates the port used when accessing the port specific registers. The downside to this is that while debugging it's almost impossible to access the port specific registers from the userspace, as the driver can change the page at any moment. The hardware supports another access mechanism: using the I2C_RX_ID registers (one for each RX port), i2c addresses can be chosen which, when accessed, will always use the specific port's registers, skipping the paging mechanism. The support is only for the RX port, but it has proven very handy while debugging and testing. So let's add the code for this, but hide it behind a disabled define. Signed-off-by: Tomi Valkeinen --- drivers/media/i2c/ds90ub960.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/media/i2c/ds90ub960.c b/drivers/media/i2c/ds90ub960.c index 98d815526341..03938def6ae9 100644 --- a/drivers/media/i2c/ds90ub960.c +++ b/drivers/media/i2c/ds90ub960.c @@ -55,6 +55,15 @@ #define MHZ(v) ((u32)((v) * 1000000U)) +/* + * If this is defined, the i2c addresses from UB960_DEBUG_I2C_RX_ID to + * UB960_DEBUG_I2C_RX_ID + 3 can be used to access the paged RX port registers + * directly. + * + * Only for debug purposes. + */ +/* #define UB960_DEBUG_I2C_RX_ID 0x40 */ + #define UB960_POLL_TIME_MS 500 #define UB960_MAX_RX_NPORTS 4 @@ -351,7 +360,7 @@ #define UB960_SR_FPD3_RX_ID(n) (0xf0 + (n)) #define UB960_SR_FPD3_RX_ID_LEN 6 -#define UB960_SR_I2C_RX_ID(n) (0xf8 + (n)) /* < UB960_FPD_RX_NPORTS */ +#define UB960_SR_I2C_RX_ID(n) (0xf8 + (n)) #define UB9702_SR_REFCLK_FREQ 0x3d @@ -4001,6 +4010,12 @@ static int ub960_probe(struct i2c_client *client) schedule_delayed_work(&priv->poll_work, msecs_to_jiffies(UB960_POLL_TIME_MS)); +#ifdef UB960_DEBUG_I2C_RX_ID + for (unsigned int i = 0; i < 4; i++) + ub960_write(priv, UB960_SR_I2C_RX_ID(i), + (UB960_DEBUG_I2C_RX_ID + i) << 1); +#endif + return 0; err_free_sers: