From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751335AbeBRIyP (ORCPT ); Sun, 18 Feb 2018 03:54:15 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:49772 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751163AbeBRIyO (ORCPT ); Sun, 18 Feb 2018 03:54:14 -0500 From: Kai-Heng Feng To: airlied@linux.ie Cc: mario.kleiner.de@gmail.com, daniel.vetter@intel.com, gustavo@padovan.org, seanpaul@chromium.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Kai-Heng Feng Subject: [PATCH] drm/edid: Add 6 bpc quirk for CPT panel in Asus UX303LA Date: Sun, 18 Feb 2018 16:53:59 +0800 Message-Id: <20180218085359.7817-1-kai.heng.feng@canonical.com> X-Mailer: git-send-email 2.15.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Similar to commit e10aec652f31 ("drm/edid: Add 6 bpc quirk for display AEO model 0."), the EDID reports "DFP 1.x compliant TMDS" but it support 6bpc instead of 8 bpc. Hence, use 6 bpc quirk for this panel. Fixes: 196f954e2509 ("drm/i915/dp: Revert "drm/i915/dp: fall back to 18 bpp when sink capability is unknown"") BugLink: https://bugs.launchpad.net/bugs/1749420 Signed-off-by: Kai-Heng Feng --- drivers/gpu/drm/drm_edid.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index ddd537914575..d9c8d718e261 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -113,6 +113,9 @@ static const struct edid_quirk { /* AEO model 0 reports 8 bpc, but is a 6 bpc panel */ { "AEO", 0, EDID_QUIRK_FORCE_6BPC }, + /* CPT panel of Asus UX303LA reports 8 bpc, but is a 6 bpc panel */ + { "CPT", 0x17df, EDID_QUIRK_FORCE_6BPC }, + /* Belinea 10 15 55 */ { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 }, { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 }, -- 2.15.1