From patchwork Wed Nov 22 09:30:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Cao, Bingbu" X-Patchwork-Id: 746328 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="dITogRhL" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 632FB9E for ; Wed, 22 Nov 2023 01:21:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1700644896; x=1732180896; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=79zhsmHbC9L3HZltzeo7ojFHA8HLIlDMuLcMtCwD4ZI=; b=dITogRhL4fmXm2z7aDQwp91UCrk5feuAXLfPehT8ZaiesHQCTXhlMsUH 45ExMLP/STHALSsHOg7UBF8jLzJZg8y7k34WvPBs9+kECx4XUDvzPXi2k Y3SkNMLKVrl4XO1FncqW0tQe5BnNxXdqxyqIAzCnF5FTsbvWjHCa+AG7R IXkCEW6VkHAVfqIeP7D7fBXYSAKrbF7rozqojqnrmYD6cssGDosPJFWIq kLTstVvNPDQuopK9o+z7O6nQ5MFbb85LN8Qkdu2yxB/kQ1Gga4HXqxta1 YXUW6VE0oaAxHXgqWrsMvTaZdsehzFe8Su+6+BQVoXGVoHo1ygUuxBBnO g==; X-IronPort-AV: E=McAfee;i="6600,9927,10901"; a="372193662" X-IronPort-AV: E=Sophos;i="6.04,218,1695711600"; d="scan'208";a="372193662" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Nov 2023 01:21:36 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10901"; a="910729322" X-IronPort-AV: E=Sophos;i="6.04,218,1695711600"; d="scan'208";a="910729322" Received: from icg-kernel3.bj.intel.com ([172.16.126.107]) by fmsmga001.fm.intel.com with ESMTP; 22 Nov 2023 01:21:34 -0800 From: bingbu.cao@intel.com To: linux-media@vger.kernel.org, sakari.ailus@linux.intel.com Cc: hdegoede@redhat.com, bingbu.cao@intel.com, bingbu.cao@linux.intel.com Subject: [PATCH v3 2/4] media: ov01a10: Enable runtime PM before registering async sub-device Date: Wed, 22 Nov 2023 17:30:41 +0800 Message-ID: <20231122093043.233148-3-bingbu.cao@intel.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231122093043.233148-1-bingbu.cao@intel.com> References: <20231122093043.233148-1-bingbu.cao@intel.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Bingbu Cao As the sensor device maybe accessible right after its async sub-device is registered, such as ipu-bridge will try to power up sensor by sensor's client device's runtime PM from the async notifier callback, if runtime PM is not enabled, it will fail. So runtime PM should be ready before its async sub-device is registered and accessible by others. It also sets the runtime PM status to active as the sensor was turned on by i2c-core. Fixes: 0827b58dabff ("media: i2c: add ov01a10 image sensor driver") Cc: stable@vger.kernel.org Signed-off-by: Bingbu Cao --- drivers/media/i2c/ov01a10.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/drivers/media/i2c/ov01a10.c b/drivers/media/i2c/ov01a10.c index 2b9e1b3a3bf4..9afe9bf50334 100644 --- a/drivers/media/i2c/ov01a10.c +++ b/drivers/media/i2c/ov01a10.c @@ -907,6 +907,7 @@ static void ov01a10_remove(struct i2c_client *client) v4l2_ctrl_handler_free(sd->ctrl_handler); pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); } static int ov01a10_probe(struct i2c_client *client) @@ -953,17 +954,26 @@ static int ov01a10_probe(struct i2c_client *client) goto err_media_entity_cleanup; } + /* + * Device is already turned on by i2c-core with ACPI domain PM. + * Enable runtime PM and turn off the device. + */ + pm_runtime_set_active(&client->dev); + pm_runtime_enable(dev); + pm_runtime_idle(dev); + ret = v4l2_async_register_subdev_sensor(&ov01a10->sd); if (ret < 0) { dev_err(dev, "Failed to register subdev: %d\n", ret); - goto err_media_entity_cleanup; + goto err_pm_disable; } - pm_runtime_enable(dev); - pm_runtime_idle(dev); - return 0; +err_pm_disable: + pm_runtime_disable(dev); + pm_runtime_set_suspended(&client->dev); + err_media_entity_cleanup: media_entity_cleanup(&ov01a10->sd.entity);