From patchwork Wed Sep 12 06:22:51 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Lee, Shawn C" X-Patchwork-Id: 10596737 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B29E714DB for ; Wed, 12 Sep 2018 05:51:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A30CB2979D for ; Wed, 12 Sep 2018 05:51:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 95E99299BC; Wed, 12 Sep 2018 05:51:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 5E4EA2979D for ; Wed, 12 Sep 2018 05:51:55 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E75126E458; Wed, 12 Sep 2018 05:51:44 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id 88B5C6E448; Wed, 12 Sep 2018 05:51:42 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Sep 2018 22:51:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.53,363,1531810800"; d="scan'208";a="69330459" Received: from shawnle1-cm6330.itwn.intel.com ([10.5.230.140]) by fmsmga007.fm.intel.com with ESMTP; 11 Sep 2018 22:51:39 -0700 From: "Lee, Shawn C" To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Tue, 11 Sep 2018 23:22:51 -0700 Message-Id: <1536733371-25004-4-git-send-email-shawn.c.lee@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1536733371-25004-1-git-send-email-shawn.c.lee@intel.com> References: <1536733371-25004-1-git-send-email-shawn.c.lee@intel.com> Subject: [Intel-gfx] [PATCH v4 3/3] drm: add LG eDP panel to quirk database X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Cooper Chiou , Lee@freedesktop.org, Jani Nikula , Dhinakaran Pandiyan MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP The N value was computed by kernel driver that based on synchronous clock mode. But only specific N value (0x8000) would be acceptable for LG LP140WF6-SPM1 eDP panel which is running at asynchronous clock mode. With the other N value, Tcon will enter BITS mode and display black screen. Add this panel into quirk database and give particular N value when calculate M/N divider. v2: no update v3: add lost commit messages back for version 2 v4: send patch to both intel-gfx and dri-devel Cc: Jani Nikula Cc: Cooper Chiou Cc: Matt Atwood Cc: Maarten Lankhorst Cc: Dhinakaran Pandiyan Cc: Clint Taylor Signed-off-by: Lee, Shawn C --- drivers/gpu/drm/drm_dp_helper.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index f3a7563eb8a1..67d683453f1c 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -1270,6 +1270,8 @@ struct dpcd_quirk { static const struct dpcd_quirk dpcd_quirk_list[] = { /* Analogix 7737 needs reduced M and N at HBR2 link rates */ { OUI(0x00, 0x22, 0xb9), DEVICE_ID_ANY, true, BIT(DP_DPCD_QUIRK_CONSTANT_N) }, + /* LG LP140WF6-SPM1 eDP panel */ + { OUI(0x00, 0x22, 0xb9), DEVICE_ID('s', 'i', 'v', 'a', 'r', 'T'), false, BIT(DP_DPCD_QUIRK_CONSTANT_N) }, }; #undef OUI