From patchwork Sat Feb 17 18:49:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Ond=C5=99ej_Jirman?= X-Patchwork-Id: 774007 Received: from vps.xff.cz (vps.xff.cz [195.181.215.36]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C1A3341A91; Sat, 17 Feb 2024 18:49:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.181.215.36 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708195790; cv=none; b=cEzZ3uvTlx905hAhzHyc9yJXkNOfQiNUksYwld/LsvjW3TP530tqMLujJH+x/LEtIVy4j7VNUny5vpkSfXNNnbKk0jlPS++i71rWYG2tcWXeZZYv2yppQMojcoLEVnyG0ZMSd914nMgmOebPq++rpF8VmEDrLhCuwSVc/OlsWQo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708195790; c=relaxed/simple; bh=P6v2JvS1OzYzht9jsA5pBiVpyCWfx3yjVjiid49u5/w=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=JTNpqS3+ro6XkZD+EHmu+S2iokblpYxJwW8U8cRk2Xs9KLOCevjiiNIwn0jLtXyaR5ccHLH27eBDlDoQ+16d40C6YO1vXPnsJYJYO8jnG36XX4tY42xiWfijPl/Up2/2qTa8gJ6CFS3BtsnRn7l2znPgsQQQ7/s+hihUi5YFf2k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=xff.cz; spf=pass smtp.mailfrom=xff.cz; dkim=pass (1024-bit key) header.d=xff.cz header.i=@xff.cz header.b=p0kanJWR; arc=none smtp.client-ip=195.181.215.36 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=xff.cz Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=xff.cz Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=xff.cz header.i=@xff.cz header.b="p0kanJWR" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=xff.cz; s=mail; t=1708195786; bh=P6v2JvS1OzYzht9jsA5pBiVpyCWfx3yjVjiid49u5/w=; h=From:To:Cc:Subject:Date:From; b=p0kanJWRFlJOStFcRZd6OHuJj8qJIcMfZFEEegxQq5DwKlImYdrK+uyJIBAOKgqXr 03UvSjh3i3+1kZSwf3EDN4AEQFQxOPsfC1Ybw8wh34Bhxj83nAaSwO78S58+OSZRWQ tZRVXXOf5Dc7WiKU8u6JwRQG1rJtTgw4DynssOP4= From: =?utf-8?q?Ond=C5=99ej_Jirman?= To: linux-kernel@vger.kernel.org Cc: Ondrej Jirman , Sakari Ailus , Mauro Carvalho Chehab , linux-media@vger.kernel.org (open list:V4L2 LENS DRIVERS) Subject: [PATCH] media: i2c: dw9714: Fix occasional probe errors Date: Sat, 17 Feb 2024 19:49:11 +0100 Message-ID: <20240217184926.1754245-1-megi@xff.cz> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Ondrej Jirman The powerup delay was not observed during probe, leading to occasional I2C communication failures in RPM suspend callback. Power delay is properly observed in resume callback already. Signed-off-by: Ondrej Jirman --- drivers/media/i2c/dw9714.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/media/i2c/dw9714.c b/drivers/media/i2c/dw9714.c index cc09b32ede60..84d29bcf0ccd 100644 --- a/drivers/media/i2c/dw9714.c +++ b/drivers/media/i2c/dw9714.c @@ -157,6 +157,8 @@ static int dw9714_probe(struct i2c_client *client) return rval; } + usleep_range(1000, 2000); + v4l2_i2c_subdev_init(&dw9714_dev->sd, client, &dw9714_ops); dw9714_dev->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;