From patchwork Wed Nov 28 13:52:10 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanislav Lisovskiy X-Patchwork-Id: 10702677 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 033E017D5 for ; Wed, 28 Nov 2018 13:52:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E83FA2D3D2 for ; Wed, 28 Nov 2018 13:52:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DC6FB2D3D6; Wed, 28 Nov 2018 13:52:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id DFD032D3D6 for ; Wed, 28 Nov 2018 13:52:16 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B84F96E00B; Wed, 28 Nov 2018 13:52:15 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id E462B6E00B; Wed, 28 Nov 2018 13:52:14 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 28 Nov 2018 05:52:14 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,290,1539673200"; d="scan'208";a="95339620" Received: from slisovsk-lenovo-ideapad-720s-13ikb.fi.intel.com ([10.237.72.122]) by orsmga006.jf.intel.com with ESMTP; 28 Nov 2018 05:52:11 -0800 From: Stanislav Lisovskiy To: dri-devel@lists.freedesktop.org Date: Wed, 28 Nov 2018 15:52:10 +0200 Message-Id: <20181128135210.2939-1-stanislav.lisovskiy@intel.com> X-Mailer: git-send-email 2.17.1 Subject: [Intel-gfx] [PATCH] Return only active connectors for GET_RESOURCES X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ville.syrjala@intel.com, intel-gfx@lists.freedesktop.org, martin.peres@intel.com, stable@vger.kernel.org MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP Currently kernel might allocate different connector ids for the same outputs in case of DP MST, which seems to confuse userspace. There are can be different connector ids in the list, which could be assigned to the same output, while being in different states. This results in issues, like external displays staying blank after quick unplugging and plugging back(bug #106250). Returning only active DP connectors fixes the issue. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106250 Signed-off-by: Stanislav Lisovskiy --- drivers/gpu/drm/drm_mode_config.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c index ee80788f2c40..ec5b2b08a45e 100644 --- a/drivers/gpu/drm/drm_mode_config.c +++ b/drivers/gpu/drm/drm_mode_config.c @@ -143,6 +143,7 @@ int drm_mode_getresources(struct drm_device *dev, void *data, drm_connector_list_iter_begin(dev, &conn_iter); count = 0; connector_id = u64_to_user_ptr(card_res->connector_id_ptr); + DRM_DEBUG_KMS("GetResources: writing connectors start"); drm_for_each_connector_iter(connector, &conn_iter) { /* only expose writeback connectors if userspace understands them */ if (!file_priv->writeback_connectors && @@ -150,15 +151,20 @@ int drm_mode_getresources(struct drm_device *dev, void *data, continue; if (drm_lease_held(file_priv, connector->base.id)) { - if (count < card_res->count_connectors && - put_user(connector->base.id, connector_id + count)) { - drm_connector_list_iter_end(&conn_iter); - return -EFAULT; + if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort || + connector->status != connector_status_disconnected) { + if (count < card_res->count_connectors && + put_user(connector->base.id, connector_id + count)) { + drm_connector_list_iter_end(&conn_iter); + return -EFAULT; + } + DRM_DEBUG_KMS("GetResources: connector %s", connector->name); + count++; } - count++; } } card_res->count_connectors = count; + DRM_DEBUG_KMS("GetResources: writing connectors end - count %d", count); drm_connector_list_iter_end(&conn_iter); return ret;