From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752614Ab1LIJDr (ORCPT ); Fri, 9 Dec 2011 04:03:47 -0500 Received: from mga09.intel.com ([134.134.136.24]:65185 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752196Ab1LIJDp (ORCPT ); Fri, 9 Dec 2011 04:03:45 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.67,351,1309762800"; d="scan'208";a="85327678" Date: Fri, 9 Dec 2011 17:03:43 +0800 From: Wu Fengguang To: Keith Packard Cc: Takashi Iwai , "Wang, Zhenyu Z" , "intel-gfx@lists.freedesktop.org" , LKML Subject: [PATCH] drm/i915: DisplayPort hot remove notification to audio driver Message-ID: <20111209090343.GA2320@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On DP monitor hot remove, clear DP_AUDIO_OUTPUT_ENABLE accordingly, so that the audio driver will receive hot plug events and take action to refresh its device state and ELD contents. Note that the DP_AUDIO_OUTPUT_ENABLE bit may be enabled or disabled only when the link training is complete and set to "Normal". Signed-off-by: Wu Fengguang --- drivers/gpu/drm/i915/intel_dp.c | 1 + 1 file changed, 1 insertion(+) This works both on KMS console and gnome desktop. Hot plug/unplug and DPMS on/off are all tested OK. --- linux.orig/drivers/gpu/drm/i915/intel_dp.c 2011-12-09 16:51:21.000000000 +0800 +++ linux/drivers/gpu/drm/i915/intel_dp.c 2011-12-09 16:59:45.000000000 +0800 @@ -1771,6 +1771,7 @@ intel_dp_link_down(struct intel_dp *inte intel_wait_for_vblank(dev, to_intel_crtc(crtc)->pipe); } + DP &= ~DP_AUDIO_OUTPUT_ENABLE; I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN); POSTING_READ(intel_dp->output_reg); msleep(intel_dp->panel_power_down_delay);