From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 342D9C79F9E for ; Mon, 7 Sep 2026 04:46:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B764310E629; Mon, 7 Sep 2026 04:46:40 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="OayOWAkm"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.14]) by gabe.freedesktop.org (Postfix) with ESMTPS id B334810E629 for ; Mon, 7 Sep 2026 04:46:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1788756399; x=1820292399; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Xjeooc4xslSCg1w6azJElxKpdiDoz6Y7egQZjn0C+ck=; b=OayOWAkmnRTvC71Iiq0nCWjNX621VrbkIrSy4zcEM1BcufuaM1pYTnYC OfL7c8j3H0GkdEQV6oR8YbsjBSL7bbYZ2ujRbAmD/lp4lFRDJe0nJVOec fDcrKibLwOPz6uxGdYjtMDy/sN+jisDf5zdPUrRF0Sd/0z6YBFUdfnnFI y8OluiftrMW3UioCj1ExROhERLTx83Ry5zwJMSOkncTWU+56ACbYg7lyS +MX6JJ8pH8lhmjel5hykavoQRkI+1a5iNRcbnSOFzn2epUFDDOfCpdX/l bpfluX3y8emOv/rt9GXdsWm6v41StBRXJZ0edd/hlxC/KZMd5cUUhoAhw Q==; X-CSE-ConnectionGUID: OwIMFql6TyqsMdBBmfD/Gw== X-CSE-MsgGUID: 2demaHu5Rv2eMsREq49l0g== X-IronPort-AV: E=McAfee;i="6800,10657,11898"; a="93022685" X-IronPort-AV: E=Sophos;i="6.25,266,1779174000"; d="scan'208";a="93022685" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Sep 2026 21:46:38 -0700 X-CSE-ConnectionGUID: kR7CahETQtyT6L1Rh0cMug== X-CSE-MsgGUID: TSibZovMRKuYKOBMwHjdFA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,266,1779174000"; d="scan'208";a="267352147" Received: from xiaolu.sh.intel.com ([10.239.146.103]) by fmviesa007.fm.intel.com with ESMTP; 06 Sep 2026 21:46:37 -0700 From: Xiao Lu To: intel-gfx@lists.freedesktop.org Cc: jani.nikula@linux.intel.com, ville.syrjala@linux.intel.com, imre.deak@intel.com, ankit.k.nautiyal@intel.com, Xiao Lu Subject: [PATCH v5 0/2] drm/i915/dp: enable DSC passthrough for HDMI 2.1 PCON devices Date: Mon, 7 Sep 2026 12:44:08 +0800 Message-ID: <20260907044410.1368008-1-xiaolu.xie@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260906094156.1057767-1-xiaolu.xie@intel.com> References: <20260906094156.1057767-1-xiaolu.xie@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" This series enables explicit driver control of DSC passthrough for HDMI 2.1 PCON devices (e.g. Parade PS196) connected both directly (SST) and via MST hub (e.g. PS8650). Patch 1/2 fixes drm_dp_mst_is_virtual_dpcd() to also recognize DP_PEER_DEVICE_DP_LEGACY_CONV as a valid downstream peer type in the DP-to-DP branch, which is required for passthrough_aux to be correctly set when a PCON sits behind an MST hub. Patch 2/2 adds the intel_dp driver changes to detect, configure and control DSC passthrough mode. Tested with Parade PS196G + Lenovo ThinkVision Pro 27UD-10 (HDMI 2.1, DSC 1.2). At 4K@240Hz DSC is required; driver writes 0x160=0x02 and DSC parameters are derived from the HDMI sink EDID. Xiao Lu (2): drm/dp/mst: recognize DP-to-HDMI PCON as virtual DPCD in DP-to-DP topology drm/i915/dp: enable DSC passthrough for HDMI 2.1 PCON devices drivers/gpu/drm/display/drm_dp_mst_topology.c | 3 +- drivers/gpu/drm/i915/display/intel_display_types.h | 1 + drivers/gpu/drm/i915/display/intel_dp.c | 275 ++++++++++++++++++--- 3 files changed, 244 insertions(+), 35 deletions(-) -- 2.43.0