From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 AD36A4BC018; Sat, 28 Feb 2026 17:55:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772301344; cv=none; b=QPsCrIjyHs6o682pJ2YxeEjmexIVDD0+FL1MZqwP90PR/z84VAPDw2sgzZ2aTir8xuoCy0bF4PycrRnzxyoSdfOHdeTHWHqC3Gj1/H56HTntqCL929I9jGy+J+fvTXOKr4lLkFhXzE6ov74TfqrVBwHK0tvTy1CSWXUZYdGAv4s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772301344; c=relaxed/simple; bh=mHbcm3efLdr7ht2qO4sssYcb9ZspIVB/JiuwDFBdiAk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XaMyFH15LMgfQ1niFkF0HgWb3CMO2cb/Cb1N7wh3AxVIchXhCq6ep/Fy3F/qMc5vEfc+UIEIkfcjMyT1pUckb8lc4Ul3q2Upe9DV8G3Z/w3RURrN4KqfQcpK/QVwRdxGMBnMTnmu7mhSLn7ShLpXHqq92R7FsxPhokqriWbsBoM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Zv98+G5w; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Zv98+G5w" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AAABBC116D0; Sat, 28 Feb 2026 17:55:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772301344; bh=mHbcm3efLdr7ht2qO4sssYcb9ZspIVB/JiuwDFBdiAk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Zv98+G5wIRZns+V0IiLn2UkTy54FH1uAVnVOGzLYj5Juar+Gub3yw1+Z3G9tiV91Z qg+chtYIlCG0TwRQKk4M9aXk48XsqjC+8EVquZc4XnTLgbLZXfLjfJ0Y2QZz5Cn93s MdRdsDWVIIyc8VhA4YXMU462WwzOfBBpfzTHsHqPeKYqdlHRElc7r5gaTtVFdRP24e cdq//xr2+MplovnRH8YfzQ3AYEtteoJdLlzYBqQxIA6p4DsAQ50UBkcqtWR+q0/Qow VGoRLhSMdZN5engP4Yq1sZFM7+BmdypPapxsvPb/CiBJw+2Y7AVCoNmL7GPmvPWlrn 1yUpnpX/KmiHA== From: Sasha Levin To: patches@lists.linux.dev Cc: Ricardo Ribalda , Hans de Goede , Neil Sun , Naomi Huang , stable@vger.kernel.org, Sakari Ailus , Hans Verkuil , Sasha Levin Subject: [PATCH 6.18 531/752] media: dw9714: Fix powerup sequence Date: Sat, 28 Feb 2026 12:44:02 -0500 Message-ID: <20260228174750.1542406-531-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228174750.1542406-1-sashal@kernel.org> References: <20260228174750.1542406-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Ricardo Ribalda [ Upstream commit 401aec35ac7bd04b4018a519257b945abb88e26c ] We have experienced seen multiple I2C errors while doing stress test on the module: dw9714 i2c-PRP0001:01: dw9714_vcm_resume I2C failure: -5 dw9714 i2c-PRP0001:01: I2C write fail Inspecting the powerup sequence we found that it does not match the documentation at: https://blog.arducam.com/downloads/DW9714A-DONGWOON(Autofocus_motor_manual).pdf """ (2) DW9714A requires waiting time of 12ms after power on. During this waiting time, the offset calibration of internal amplifier is operating for minimization of output offset current . """ This patch increases the powerup delay to follow the documentation. Fixes: 9d00ccabfbb5 ("media: i2c: dw9714: Fix occasional probe errors") Signed-off-by: Ricardo Ribalda Reviewed-by: Hans de Goede Tested-by: Neil Sun Reported-by: Naomi Huang Cc: stable@vger.kernel.org Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil Signed-off-by: Sasha Levin --- drivers/media/i2c/dw9714.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/i2c/dw9714.c b/drivers/media/i2c/dw9714.c index 1e7ad355a388c..3288de539452e 100644 --- a/drivers/media/i2c/dw9714.c +++ b/drivers/media/i2c/dw9714.c @@ -149,7 +149,7 @@ static int dw9714_power_up(struct dw9714_device *dw9714_dev) gpiod_set_value_cansleep(dw9714_dev->powerdown_gpio, 0); - usleep_range(1000, 2000); + usleep_range(12000, 14000); return 0; } -- 2.51.0