From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754732AbaHESOS (ORCPT ); Tue, 5 Aug 2014 14:14:18 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:52206 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753877AbaHESOP (ORCPT ); Tue, 5 Aug 2014 14:14:15 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Scot Doyle , Stefan Nagy , Jani Nikula , Daniel Vetter Subject: [PATCH 3.15 37/42] drm/i915: Ignore VBT backlight presence check on HP Chromebook 14 Date: Tue, 5 Aug 2014 11:13:51 -0700 Message-Id: <20140805181322.123197343@linuxfoundation.org> X-Mailer: git-send-email 2.0.4 In-Reply-To: <20140805181321.018370988@linuxfoundation.org> References: <20140805181321.018370988@linuxfoundation.org> User-Agent: quilt/0.63-1 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 3.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Scot Doyle commit 724cb06fa9b1e1ffd98188275543fdb3b8eaca4f upstream. commit c675949ec58ca50d5a3ae3c757892f1560f6e896 drm/i915: do not setup backlight if not available according to VBT caused a regression on the HP Chromebook 14 (with Celeron 2955U CPU), which has a misconfigured VBT. Apply quirk to ignore the VBT backlight presence check during backlight setup. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79813 Signed-off-by: Scot Doyle Tested-by: Stefan Nagy Cc: Jani Nikula Cc: Daniel Vetter Signed-off-by: Daniel Vetter Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/intel_display.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -11251,6 +11251,9 @@ static struct intel_quirk intel_quirks[] /* Toshiba CB35 Chromebook (Celeron 2955U) */ { 0x0a06, 0x1179, 0x0a88, quirk_backlight_present }, + + /* HP Chromebook 14 (Celeron 2955U) */ + { 0x0a06, 0x103c, 0x21ed, quirk_backlight_present }, }; static void intel_init_quirks(struct drm_device *dev)