From patchwork Wed Nov 22 09:30:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Cao, Bingbu" X-Patchwork-Id: 746327 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="YGm3hS5m" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 3472B9E for ; Wed, 22 Nov 2023 01:21:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1700644900; x=1732180900; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=eOBoafPmE3Cy5R4CYWXvOsODA4dEu8M7atsG4F5x6Mk=; b=YGm3hS5m65QTtIDXDemCjxVOupfnY9jLq6ujjGFqnQ2KV+wNJfi9mnpX at9YRlJXE0kzqIROOckfbLR8NXEZblwm/+0OjWPepcgikGQgbN0IYOJTg RGn1ViFrt8QbWQ7MLnZjQB25v667U1NqJhBCO5VrOQq8ZA5At/+joHDcX mfx8nn0ssx779Sc0Wd/LLieRxxwjiOvTtxyhIkCDfoR84hDRS2sfoq1cJ qX3hbMTjdidxKvN9B8YbCYhUUnTZ8FZvwfrgKr2kTWJTHmXCuJgK7WY3p MGK92ELmV9N4/OwIxrlzgsLEuE5yxLBeStC2YrDtkRAauo17ceWtdeMJ7 g==; X-IronPort-AV: E=McAfee;i="6600,9927,10901"; a="372193674" X-IronPort-AV: E=Sophos;i="6.04,218,1695711600"; d="scan'208";a="372193674" 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 01:21:40 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10901"; a="910729329" X-IronPort-AV: E=Sophos;i="6.04,218,1695711600"; d="scan'208";a="910729329" Received: from icg-kernel3.bj.intel.com ([172.16.126.107]) by fmsmga001.fm.intel.com with ESMTP; 22 Nov 2023 01:21:38 -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 4/4] media: ov9734: Enable runtime PM before registering async sub-device Date: Wed, 22 Nov 2023 17:30:43 +0800 Message-ID: <20231122093043.233148-5-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. Fixes: d3f863a63fe4 ("media: i2c: Add ov9734 image sensor driver") Cc: stable@vger.kernel.org Signed-off-by: Bingbu Cao --- drivers/media/i2c/ov9734.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/drivers/media/i2c/ov9734.c b/drivers/media/i2c/ov9734.c index b6244772bc59..b36fc0fedad4 100644 --- a/drivers/media/i2c/ov9734.c +++ b/drivers/media/i2c/ov9734.c @@ -939,6 +939,7 @@ static void ov9734_remove(struct i2c_client *client) media_entity_cleanup(&sd->entity); v4l2_ctrl_handler_free(sd->ctrl_handler); pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); mutex_destroy(&ov9734->mutex); } @@ -984,13 +985,6 @@ static int ov9734_probe(struct i2c_client *client) goto probe_error_v4l2_ctrl_handler_free; } - ret = v4l2_async_register_subdev_sensor(&ov9734->sd); - if (ret < 0) { - dev_err(&client->dev, "failed to register V4L2 subdev: %d", - ret); - goto probe_error_media_entity_cleanup; - } - /* * Device is already turned on by i2c-core with ACPI domain PM. * Enable runtime PM and turn off the device. @@ -999,9 +993,18 @@ static int ov9734_probe(struct i2c_client *client) pm_runtime_enable(&client->dev); pm_runtime_idle(&client->dev); + ret = v4l2_async_register_subdev_sensor(&ov9734->sd); + if (ret < 0) { + dev_err(&client->dev, "failed to register V4L2 subdev: %d", + ret); + goto probe_error_media_entity_cleanup_pm; + } + return 0; -probe_error_media_entity_cleanup: +probe_error_media_entity_cleanup_pm: + pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); media_entity_cleanup(&ov9734->sd.entity); probe_error_v4l2_ctrl_handler_free: