From patchwork Tue May 16 09:54:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 13242853 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AF5E7C77B7F for ; Tue, 16 May 2023 09:56:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232216AbjEPJ4L (ORCPT ); Tue, 16 May 2023 05:56:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60632 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232203AbjEPJ4I (ORCPT ); Tue, 16 May 2023 05:56:08 -0400 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 059412D62 for ; Tue, 16 May 2023 02:56:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1684230967; x=1715766967; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=3fjbuzwB4TQgvmEum3YTXwrxL3vBT0PAChlBP/Zs2sQ=; b=RKixRkr93MEUp+cun+v8awR6KdZdBmkz9cqkcjwBe/GFlRK7JY47nqVc 8gXsJO9IVHtEoLqLa2IxRfR/QWDowV2316grFYsH+g+ivuNCM5ds+Fwz9 +N+ZqNTib0AznitBPZmnRRIFN5X+0xq3OaactMAHOGUsWcj+Mpww9GGUU xPmppIqb1Zfo3CAfeVfIouvwsZKRXsBtyjpsLFCV+ru9geO9OKeelRtLh 4XjHVITU4IkIrqyGI5DVc2xaEF+VjiWuorwwAA7jdX7BTnzRLPrIA9ttJ Ei/axQz6K4KG6wlmWcpZu8Ys1Zz0hLGGwf5CyR9DWddGW99QfLF6eeFWa Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10711"; a="353715228" X-IronPort-AV: E=Sophos;i="5.99,278,1677571200"; d="scan'208";a="353715228" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 May 2023 02:55:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10711"; a="678791323" X-IronPort-AV: E=Sophos;i="5.99,278,1677571200"; d="scan'208";a="678791323" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 May 2023 02:55:38 -0700 Received: from punajuuri.localdomain (punajuuri.localdomain [192.168.240.130]) by kekkonen.fi.intel.com (Postfix) with ESMTP id E80A51216E0; Tue, 16 May 2023 12:55:35 +0300 (EEST) Received: from sailus by punajuuri.localdomain with local (Exim 4.94.2) (envelope-from ) id 1pyrOx-002Z9m-UV; Tue, 16 May 2023 12:55:27 +0300 From: Sakari Ailus To: linux-media@vger.kernel.org Cc: laurent.pinchart@ideasonboard.com, Philipp Zabel , hverkuil@xs4all.nl, Francesco Dolcini , aishwarya.kothari@toradex.com, Robert Foss , Todor Tomov , Hyun Kwon , bingbu.cao@intel.com Subject: [PATCH v2 04/31] media: v4l: async: Add some debug prints Date: Tue, 16 May 2023 12:54:50 +0300 Message-Id: <20230516095517.611711-5-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230516095517.611711-1-sakari.ailus@linux.intel.com> References: <20230516095517.611711-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Just add some debug prints for V4L2 async sub-device matching process. These might come useful in figuring out why things don't work as expected. Signed-off-by: Sakari Ailus --- drivers/media/v4l2-core/v4l2-async.c | 71 ++++++++++++++++++++++++---- 1 file changed, 63 insertions(+), 8 deletions(-) diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c index 7831bc8792904..5f43107910e89 100644 --- a/drivers/media/v4l2-core/v4l2-async.c +++ b/drivers/media/v4l2-core/v4l2-async.c @@ -77,6 +77,17 @@ static bool match_i2c(struct v4l2_async_notifier *notifier, #endif } +static struct device *notifier_dev(struct v4l2_async_notifier *notifier) +{ + if (notifier->sd) + return notifier->sd->dev; + + if (notifier->v4l2_dev) + return notifier->v4l2_dev->dev; + + return NULL; +} + static bool match_fwnode_one(struct v4l2_async_notifier *notifier, struct v4l2_subdev *sd, struct fwnode_handle *sd_fwnode, @@ -88,13 +99,20 @@ match_fwnode_one(struct v4l2_async_notifier *notifier, bool sd_fwnode_is_ep; struct device *dev; + dev_dbg(notifier_dev(notifier), + "v4l2-async: fwnode match: need %pfw, trying %pfw\n", + sd_fwnode, asd->match.fwnode); + /* * Both the subdev and the async subdev can provide either an endpoint * fwnode or a device fwnode. Start with the simple case of direct * fwnode matching. */ - if (sd_fwnode == asd->match.fwnode) + if (sd_fwnode == asd->match.fwnode) { + dev_dbg(notifier_dev(notifier), + "v4l2-async: direct match found\n"); return true; + } /* * Otherwise, check if the sd fwnode and the asd fwnode refer to an @@ -107,8 +125,11 @@ match_fwnode_one(struct v4l2_async_notifier *notifier, sd_fwnode_is_ep = fwnode_graph_is_endpoint(sd_fwnode); asd_fwnode_is_ep = fwnode_graph_is_endpoint(asd->match.fwnode); - if (sd_fwnode_is_ep == asd_fwnode_is_ep) + if (sd_fwnode_is_ep == asd_fwnode_is_ep) { + dev_dbg(notifier_dev(notifier), + "v4l2-async: direct match not found\n"); return false; + } /* * The sd and asd fwnodes are of different types. Get the device fwnode @@ -122,10 +143,17 @@ match_fwnode_one(struct v4l2_async_notifier *notifier, other_fwnode = sd_fwnode; } + dev_dbg(notifier_dev(notifier), + "v4l2-async: fwnode compat match: need %pfw, trying %pfw\n", + dev_fwnode, other_fwnode); + fwnode_handle_put(dev_fwnode); - if (dev_fwnode != other_fwnode) + if (dev_fwnode != other_fwnode) { + dev_dbg(notifier_dev(notifier), + "v4l2-async: compat match not found\n"); return false; + } /* * We have a heterogeneous match. Retrieve the struct device of the side @@ -145,12 +173,18 @@ match_fwnode_one(struct v4l2_async_notifier *notifier, dev->driver->name); } + dev_dbg(notifier_dev(notifier), "v4l2-async: compat match found\n"); + return true; } static bool match_fwnode(struct v4l2_async_notifier *notifier, struct v4l2_subdev *sd, struct v4l2_async_subdev *asd) { + dev_dbg(notifier_dev(notifier), + "v4l2-async: matching for notifier %pfw, sd fwnode %pfw\n", + dev_fwnode(notifier_dev(notifier)), sd->fwnode); + if (match_fwnode_one(notifier, sd, sd->fwnode, asd)) return true; @@ -158,6 +192,9 @@ static bool match_fwnode(struct v4l2_async_notifier *notifier, if (IS_ERR_OR_NULL(sd->fwnode->secondary)) return false; + dev_dbg(notifier_dev(notifier), + "v4l2-async: trying secondary fwnode match\n"); + return match_fwnode_one(notifier, sd, sd->fwnode->secondary, asd); } @@ -271,22 +308,33 @@ v4l2_async_nf_can_complete(struct v4l2_async_notifier *notifier) static int v4l2_async_nf_try_complete(struct v4l2_async_notifier *notifier) { + struct v4l2_async_notifier *__notifier = notifier; + /* Quick check whether there are still more sub-devices here. */ if (!list_empty(¬ifier->waiting)) return 0; + if (notifier->sd) + dev_dbg(notifier_dev(notifier), + "v4l2-async: trying to complete\n"); + /* Check the entire notifier tree; find the root notifier first. */ while (notifier->parent) notifier = notifier->parent; /* This is root if it has v4l2_dev. */ - if (!notifier->v4l2_dev) + if (!notifier->v4l2_dev) { + dev_dbg(notifier_dev(__notifier), + "v4l2-async: V4L2 device not available\n"); return 0; + } /* Is everything ready? */ if (!v4l2_async_nf_can_complete(notifier)) return 0; + dev_dbg(notifier_dev(__notifier), "v4l2-async: complete\n"); + return v4l2_async_nf_call_complete(notifier); } @@ -350,6 +398,9 @@ static int v4l2_async_match_notify(struct v4l2_async_notifier *notifier, /* Move from the global subdevice list to notifier's done */ list_move(&sd->async_list, ¬ifier->done); + dev_dbg(notifier_dev(notifier), "v4l2-async: %s bound (ret %d)\n", + dev_name(sd->dev), ret); + /* * See if the sub-device has a notifier. If not, return here. */ @@ -378,6 +429,8 @@ v4l2_async_nf_try_all_subdevs(struct v4l2_async_notifier *notifier) if (!v4l2_dev) return 0; + dev_dbg(notifier_dev(notifier), "v4l2-async: trying all sub-devices\n"); + again: list_for_each_entry(sd, &subdev_list, async_list) { struct v4l2_async_subdev *asd; @@ -387,6 +440,9 @@ v4l2_async_nf_try_all_subdevs(struct v4l2_async_notifier *notifier) if (!asd) continue; + dev_dbg(notifier_dev(notifier), "v4l2-async: match found, subdev %s\n", + sd->name); + ret = v4l2_async_match_notify(notifier, v4l2_dev, sd, asd); if (ret < 0) return ret; @@ -496,8 +552,7 @@ static int v4l2_async_nf_asd_valid(struct v4l2_async_notifier *notifier, struct v4l2_async_subdev *asd, int this_index) { - struct device *dev = - notifier->v4l2_dev ? notifier->v4l2_dev->dev : NULL; + struct device *dev = notifier_dev(notifier); if (!asd) return -EINVAL; @@ -506,12 +561,12 @@ static int v4l2_async_nf_asd_valid(struct v4l2_async_notifier *notifier, case V4L2_ASYNC_MATCH_I2C: case V4L2_ASYNC_MATCH_FWNODE: if (v4l2_async_nf_has_async_subdev(notifier, asd, this_index)) { - dev_dbg(dev, "subdev descriptor already listed in this or other notifiers\n"); + dev_dbg(dev, "v4l2-async: subdev descriptor already listed in this or other notifiers\n"); return -EEXIST; } break; default: - dev_err(dev, "Invalid match type %u on %p\n", + dev_err(dev, "v4l2-async: Invalid match type %u on %p\n", asd->match_type, asd); return -EINVAL; }