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 6EBEEC19F4F for ; Wed, 8 May 2024 12:22:58 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E96B010E131; Wed, 8 May 2024 12:22:57 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="ReqBEVYU"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.13]) by gabe.freedesktop.org (Postfix) with ESMTPS id 30E6710E131 for ; Wed, 8 May 2024 12:22:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1715170976; x=1746706976; h=from:to:cc:subject:in-reply-to:references:date: message-id:mime-version:content-transfer-encoding; bh=RCFtItGIBqNzrhjZObIbxBSb9BzUBXr72cwGpR9Ouag=; b=ReqBEVYUDIxGAsKcqS50kmmACjTo/Q7DrL8xdl1Xg62dRG9ylUtSde3R MeP+jihGHTzyh8Dpi2zO3p1rBDFI3we8jz/2w0SPun6M7mW+94hgmFWQV AjzAuePfBD58Mop0WqgtRGKtrm/iE3vfmrV6efqOZfaY5+QvqeDk/pEyJ XPqRvPRaLxiQZEFLVk/mJDij1z1j9Jovc1GO3AcRu68vIuHzkI5V+ithe EEpPSEAyX7VAPe8eJbC2saG1lrGJKvCgTmM714SXI4l/EQYWzy3vMnTDQ reSP8LBlJot/KXoqIUaCZ9PER5WEpUW/q4XqzS++m+efOoqqP7H29U/CV A==; X-CSE-ConnectionGUID: 1HlLVQSDQjq0TKexD8NjaA== X-CSE-MsgGUID: htMO03KpQtuhlV6aU8ZWew== X-IronPort-AV: E=McAfee;i="6600,9927,11066"; a="22179765" X-IronPort-AV: E=Sophos;i="6.08,145,1712646000"; d="scan'208";a="22179765" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 May 2024 05:22:56 -0700 X-CSE-ConnectionGUID: VLYd4QlwRQerePIvMnK5vg== X-CSE-MsgGUID: XpUX8LJ8TZSEI80/QGGIkQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,145,1712646000"; d="scan'208";a="33414583" Received: from unknown (HELO localhost) ([10.237.66.160]) by fmviesa004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 May 2024 05:22:54 -0700 From: Jani Nikula To: "Murthy, Arun R" , Ville =?utf-8?B?U3lyasOk?= =?utf-8?B?bMOk?= Cc: "intel-gfx@lists.freedesktop.org" Subject: Re: PATCH] drm/i915/display/dp: Remove UHBR13.5 for icl In-Reply-To: Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20240506090625.2812332-1-arun.r.murthy@intel.com> <87v83ok4kp.fsf@intel.com> <87le4kjzip.fsf@intel.com> Date: Wed, 08 May 2024 15:22:50 +0300 Message-ID: <87h6f8jxwl.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable 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" On Wed, 08 May 2024, "Murthy, Arun R" wrote: >> -----Original Message----- >> From: Nikula, Jani >> Sent: Wednesday, May 8, 2024 5:18 PM >> To: Murthy, Arun R ; Ville Syrj=C3=A4l=C3=A4 >> >> Cc: intel-gfx@lists.freedesktop.org >> Subject: RE: [PATCH] drm/i915/display/dp: Remove UHBR13.5 for icl >>=20 >> On Wed, 08 May 2024, "Murthy, Arun R" wrote: >> >> -----Original Message----- >> >> From: Nikula, Jani >> >> Sent: Wednesday, May 8, 2024 3:29 PM >> >> To: Murthy, Arun R ; Ville Syrj=C3=A4l=C3=A4 >> >> >> >> Cc: intel-gfx@lists.freedesktop.org >> >> Subject: RE: [PATCH] drm/i915/display/dp: Remove UHBR13.5 for icl >> >> >> >> On Wed, 08 May 2024, "Murthy, Arun R" wrote: >> >> > This is the limitation from the retimer hardware. >> >> >> >> The commit message needs to reflect this. >> >> >> >> Do all units have a retimer with the limitation? Or could you have a >> >> DG2 without the limitation? Do we need to check for that instead of >> >> blanket removal of UHBR 13.5 for DG2? >> >> >> > Changed the commit msg as below >> > >> > Display 12+ hardware supports UHBR13.5 >>=20 >> Not true. >>=20 >> > but due to the retimer constraints platform doesn't support UHBR13.5. >>=20 >> Which platform? >>=20 >> > This is the same for mtl and UHBR13.5 is removed as part of the commit >> > caf3d748f646 ("drm/i915/dp: Remove support for UHBR13.5") This patch >> removes UHBR13.5 support for icl/dg2. >>=20 >> ICL does not support UHBR 13.5. >>=20 > > Per bspec display12+ has uhbr13.5 Due to the retimer constraint none of t= he Intel platforms supports UHBR13.5 > Uhbr15.3 is already removed for mtl platform as part of commit caf3d748f6= 46 ("drm/i915/dp: Remove support for UHBR13.5") this patch will remove for = dg2. Where does display 12+ come from? We support UHBR starting from DG2 and display version 14+, right? BR, Jani. > > Thanks and Regards, > Arun R Murthy > -------------------- >> BR, >> Jani. >>=20 >> > >> > Thanks and Regards, >> > Arun R Murthy >> > -------------------- >> >> BR, >> >> Jani. >> >> >> >> >> >> -- >> >> Jani Nikula, Intel >>=20 >> -- >> Jani Nikula, Intel --=20 Jani Nikula, Intel