From patchwork Mon Apr 18 14:00:36 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: cpaul@redhat.com X-Patchwork-Id: 8872451 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B0FC3BF29F for ; Mon, 18 Apr 2016 14:00:45 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D39E9201B4 for ; Mon, 18 Apr 2016 14:00:44 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id E484E20125 for ; Mon, 18 Apr 2016 14:00:43 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1F0FD6E5D8; Mon, 18 Apr 2016 14:00:41 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by gabe.freedesktop.org (Postfix) with ESMTPS id D792D6E5D8; Mon, 18 Apr 2016 14:00:39 +0000 (UTC) Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 37C663B721; Mon, 18 Apr 2016 14:00:39 +0000 (UTC) Received: from ecstaticemu.bos.redhat.com (dhcp-25-142.bos.redhat.com [10.18.25.142]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u3IE0bBR007999; Mon, 18 Apr 2016 10:00:37 -0400 From: Lyude To: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Mon, 18 Apr 2016 10:00:36 -0400 Message-Id: <1460988036-26226-1-git-send-email-cpaul@redhat.com> In-Reply-To: <20160418083434.GA4329@intel.com> References: <20160418083434.GA4329@intel.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 Cc: David Airlie , "open list:INTEL DRM DRIVERS excluding Poulsbo, Moorestow..., dri-devel@lists.freedesktop.org open list:INTEL DRM DRIVERS excluding Poulsbo, Moorestow..., linux-kernel@vger.kernel.org open list" , stable@vger.kernel.org, Daniel Vetter Subject: [Intel-gfx] [PATCH v3 2/2] drm/i915/vlv: Reset the ADPA in vlv_display_power_well_init() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-5.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP While VGA hotplugging worked(ish) before, it looks like that was mainly because we'd unintentionally enable it in valleyview_crt_detect_hotplug() when we did a force trigger. This doesn't work reliably enough because whenever the display powerwell on vlv gets disabled, the values set in VLV_ADPA get cleared and consequently VGA hotplugging gets disabled. This causes bugs such as one we found on an Intel NUC, where doing the following sequence of hotplugs: - Disconnect all monitors - Connect VGA - Disconnect VGA - Connect HDMI Would result in VGA hotplugging becoming disabled, due to the powerwells getting toggled in the process of connecting HDMI. Changes since v2: - Use intel_encoder structs instead of drm_encoder structs Changes since v1: - Instead of handling the register writes ourself, we just reuse intel_crt_detect() - Instead of resetting the ADPA during display IRQ installation, we now reset them in vlv_display_power_well_init() CC: stable@vger.kernel.org Signed-off-by: Lyude Reviewed-by: Ville Syrjälä --- drivers/gpu/drm/i915/intel_runtime_pm.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index 80e8bd4..0eae08a 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -902,6 +902,7 @@ static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv, static void vlv_display_power_well_init(struct drm_i915_private *dev_priv) { + struct intel_encoder *encoder; enum pipe pipe; /* @@ -935,6 +936,12 @@ static void vlv_display_power_well_init(struct drm_i915_private *dev_priv) intel_hpd_init(dev_priv); + /* Re-enable the ADPA, if we have one */ + for_each_intel_encoder(dev_priv->dev, encoder) { + if (encoder->type == INTEL_OUTPUT_ANALOG) + encoder->base.funcs->reset(&encoder->base); + } + i915_redisable_vga_power_on(dev_priv->dev); }