From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933159Ab2BJWpk (ORCPT ); Fri, 10 Feb 2012 17:45:40 -0500 Received: from mail-pw0-f46.google.com ([209.85.160.46]:42369 "EHLO mail-pw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933118Ab2BJWpb (ORCPT ); Fri, 10 Feb 2012 17:45:31 -0500 MIME-Version: 1.0 Message-Id: <20120210223442.568405386@clark.kroah.org> User-Agent: quilt/0.51-15.1 Date: Fri, 10 Feb 2012 14:33:30 -0800 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Wang Zhenyu , Wu Fengguang , Keith Packard , Eugeni Dodonov Subject: [patch 26/55] drm/i915: HDMI hot remove notification to audio driver In-Reply-To: <20120210223500.GA24178@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Wu Fengguang commit 2deed761188d7480eb5f7efbfe7aa77f09322ed8 upstream. On HDMI monitor hot remove, clear SDVO_AUDIO_ENABLE accordingly, so that the audio driver will receive hot plug events and take action to refresh its device state and ELD contents. The cleared SDVO_AUDIO_ENABLE bit needs to be restored to prevent losing HDMI audio after DPMS on. CC: Wang Zhenyu Signed-off-by: Wu Fengguang Signed-off-by: Keith Packard Signed-off-by: Eugeni Dodonov Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/intel_hdmi.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -158,6 +158,10 @@ static void intel_hdmi_dpms(struct drm_e struct drm_i915_private *dev_priv = dev->dev_private; struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder); u32 temp; + u32 enable_bits = SDVO_ENABLE; + + if (intel_hdmi->has_audio) + enable_bits |= SDVO_AUDIO_ENABLE; temp = I915_READ(intel_hdmi->sdvox_reg); @@ -170,9 +174,9 @@ static void intel_hdmi_dpms(struct drm_e } if (mode != DRM_MODE_DPMS_ON) { - temp &= ~SDVO_ENABLE; + temp &= ~enable_bits; } else { - temp |= SDVO_ENABLE; + temp |= enable_bits; } I915_WRITE(intel_hdmi->sdvox_reg, temp);