Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752148AbdILQ5a (ORCPT ); Tue, 12 Sep 2017 12:57:30 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:48414 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751668AbdILQ5P (ORCPT ); Tue, 12 Sep 2017 12:57:15 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, David Airlie , Archit Taneja , Wolfram Sang , Lars-Peter Clausen , Laurent Pinchart , dri-devel@lists.freedesktop.org, John Stultz , Thong Ho , Nhan Nguyen Subject: [PATCH 4.4 24/31] drm/bridge: adv7511: Switch to using drm_kms_helper_hotplug_event() Date: Tue, 12 Sep 2017 09:56:19 -0700 Message-Id: <20170912165248.611705306@linuxfoundation.org> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20170912165247.436880944@linuxfoundation.org> References: <20170912165247.436880944@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2374 Lines: 63 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: John Stultz commit 6d5104c5a6b56385426e15047050584794bb6254 upstream. In chasing down a previous issue with EDID probing from calling drm_helper_hpd_irq_event() from irq context, Laurent noticed that the DRM documentation suggests that drm_kms_helper_hotplug_event() should be used instead. Thus this patch replaces drm_helper_hpd_irq_event() with drm_kms_helper_hotplug_event(), which requires we update the connector.status entry and only call _hotplug_event() when the status changes. Cc: David Airlie Cc: Archit Taneja Cc: Wolfram Sang Cc: Lars-Peter Clausen Cc: Laurent Pinchart Cc: dri-devel@lists.freedesktop.org Reviewed-by: Laurent Pinchart Tested-by: Laurent Pinchart Signed-off-by: John Stultz Signed-off-by: Archit Taneja Link: http://patchwork.freedesktop.org/patch/msgid/1484614372-15342-3-git-send-email-john.stultz@linaro.org Signed-off-by: Thong Ho Signed-off-by: Nhan Nguyen Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i2c/adv7511.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/i2c/adv7511.c +++ b/drivers/gpu/drm/i2c/adv7511.c @@ -435,8 +435,21 @@ static bool adv7511_hpd(struct adv7511 * static void adv7511_hpd_work(struct work_struct *work) { struct adv7511 *adv7511 = container_of(work, struct adv7511, hpd_work); + enum drm_connector_status status; + unsigned int val; + int ret; + ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val); + if (ret < 0) + status = connector_status_disconnected; + else if (val & ADV7511_STATUS_HPD) + status = connector_status_connected; + else + status = connector_status_disconnected; - drm_helper_hpd_irq_event(adv7511->connector.dev); + if (adv7511->connector.status != status) { + adv7511->connector.status = status; + drm_kms_helper_hotplug_event(adv7511->connector.dev); + } } static int adv7511_irq_process(struct adv7511 *adv7511, bool process_hpd)