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 6A7BD3F4AA0; Sat, 28 Feb 2026 17:42:32 +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=1772300552; cv=none; b=WEqAWtzHucWOHWhSj9u1L4K0hbNXAXgqYctqox1fNGI9r4pKdvZgek8zaZoV3d0caSfss/pBs0zJa6SbAptSBP304P9OfAax8GXE+tfz++Q9CbDIOv7R3OpQuBAu92I8IRNwcSiGtphVLoo/nyZJc/3Jd6y9KArJ+QkvYGrKz98= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772300552; c=relaxed/simple; bh=mHbcm3efLdr7ht2qO4sssYcb9ZspIVB/JiuwDFBdiAk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jJ5KX/2ASsvmvZYosuaSP0H2lvmi93JR0tTen1nGNXhM++9ROk8TVPZkBGGRkLPO7Gsb75oe5Ha9u/T85+ACqKWgGdEbVCcloGwhXguw5IjslVqRHEzu/rbjOMXyP4qwR65XXR2tUDqoOptbiAVBqJy604Inwe47sguJF46X9ks= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=a58O0OMG; 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="a58O0OMG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2081FC116D0; Sat, 28 Feb 2026 17:42:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772300552; bh=mHbcm3efLdr7ht2qO4sssYcb9ZspIVB/JiuwDFBdiAk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=a58O0OMGarJkexEaOEoL7nSyWsvlxrHni6KxiFwZfrjK7IxeEry714V8xfStvqOxH 1N2pgmbiF8QfBY/qIEpmbj9436njHtqdMqC2S/TuL7Q4JB5cJuqI/CMNhPk0SYcdpK emtXzuN4RKy2IePdPKpknLRjxvkUWPh4ib6qsun3vl9XGlqVEfnKy/qEFyqQ2yPLZh 13FgnxueHSC/X6PM+4YHjENAilO+Ovnyvf8TGkOg98KOG11Yj9i0i1w4u0ZkEx0PlL RFy8pIJ9vxvZxnLXFUYCPhE1bnVRp+WD8xtv7cbt+wlGhGlS2ySb7tdVU2PMfR8FAP GLhhVbKADNObw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ricardo Ribalda , Hans de Goede , Neil Sun , Naomi Huang , Sakari Ailus , Hans Verkuil , Sasha Levin Subject: [PATCH 6.19 591/844] media: dw9714: Fix powerup sequence Date: Sat, 28 Feb 2026 12:28:24 -0500 Message-ID: <20260228173244.1509663-592-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228173244.1509663-1-sashal@kernel.org> References: <20260228173244.1509663-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org 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