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 893DFEB64DA for ; Mon, 26 Jun 2023 12:32:34 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9BE7F10E1F4; Mon, 26 Jun 2023 12:32:33 +0000 (UTC) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9D25410E1F4 for ; Mon, 26 Jun 2023 12:32:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1687782751; x=1719318751; h=from:to:cc:subject:in-reply-to:references:date: message-id:mime-version; bh=JiYAl0UGYXagx2hW2nQLuw4OFqTN79kHJPbkY3RSQbc=; b=KW9VKc9bziNpaC7IK8f8GpR0f/VBIeb+mcXWpzWgWXRBd5xOlmCGGfuz Eeh3UB5izvBQlr6YeI7JgPfgxsnCaOFei9x+oq8f85m1p6LWo7JfhtmWz RaD/+16uK0fg4q1+P6qvtvFsNpnI5Ay6rQCwCtLuSoo3WueBOuaDVyIQ7 vpFB+rE+H1uSghOIFhL6aP5QWPwZsOOYIMuy3pLkbb8c4mBnA9q2AeAW9 NlkU/5Kis6QLabgrGcV/Ux2uJvPPm0rgBc8NQNaW/nJ3Y9f+d4EY/iSfj ZvtgZHP1iUcVomkw5L9rL40k8vNoVB5M6TXFwR5tgJiZjuWxArlJbYFKW A==; X-IronPort-AV: E=McAfee;i="6600,9927,10752"; a="427249100" X-IronPort-AV: E=Sophos;i="6.01,159,1684825200"; d="scan'208";a="427249100" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jun 2023 05:32:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10752"; a="890267884" X-IronPort-AV: E=Sophos;i="6.01,159,1684825200"; d="scan'208";a="890267884" Received: from avhiruda-mobl1.amr.corp.intel.com (HELO localhost) ([10.252.41.186]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Jun 2023 05:32:28 -0700 From: Jani Nikula To: "Murthy, Arun R" , "intel-gfx@lists.freedesktop.org" In-Reply-To: Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20230620025243.979317-1-arun.r.murthy@intel.com> <871qi5fb19.fsf@intel.com> Date: Mon, 26 Jun 2023 15:32:13 +0300 Message-ID: <87h6quv1yq.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain Subject: Re: [Intel-gfx] [PATCH] drm/i915/display/dp: Remove support for UHBR13.5 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 Thu, 22 Jun 2023, "Murthy, Arun R" wrote: >> -----Original Message----- >> From: Nikula, Jani >> Sent: Wednesday, June 21, 2023 2:27 PM >> To: Murthy, Arun R ; intel- >> gfx@lists.freedesktop.org >> Cc: Deak, Imre ; Kahola, Mika >> ; Murthy, Arun R >> Subject: Re: [PATCH] drm/i915/display/dp: Remove support for UHBR13.5 >> >> On Tue, 20 Jun 2023, Arun R Murthy wrote: >> > As per the DP2.1 Spec support for UHBR13.5 is optional. Hence removing >> > the support for UHBR13.5 >> >> That's just not a proper rationale. Please explain. >> > Programming for UHBR10 and UHBR20 is similar compared to UHBR13.5 > As of now we have validated 10Gbps and 20Gbps. The spec also points out when 20Gbps is supported 13.5Gbps is optional so we have not validated/implemented the UHBR13.5 > Now we have the DP2.1 compatible panel is market, expecting users can come up with UHBR13.5 not working. Hence removing the support for 13.5Gbps for now. > Maybe once we have support for UHBR13.5 in the driver we can enable this. What's missing? BR, Jani. > > Thanks and Regards, > Arun R Murthy > -------------------- >> BR, >> Jani. >> >> >> > UHBR10 can be used for 6k panels. >> > >> > Signed-off-by: Arun R Murthy >> > --- >> > drivers/gpu/drm/i915/display/intel_dp.c | 2 +- >> > 1 file changed, 1 insertion(+), 1 deletion(-) >> > >> > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c >> > b/drivers/gpu/drm/i915/display/intel_dp.c >> > index 9f40da20e88d..54ddc953e5bc 100644 >> > --- a/drivers/gpu/drm/i915/display/intel_dp.c >> > +++ b/drivers/gpu/drm/i915/display/intel_dp.c >> > @@ -465,7 +465,7 @@ intel_dp_set_source_rates(struct intel_dp >> *intel_dp) >> > }; >> > static const int icl_rates[] = { >> > 162000, 216000, 270000, 324000, 432000, 540000, 648000, >> 810000, >> > - 1000000, 1350000, >> > + 1000000, >> > }; >> > static const int bxt_rates[] = { >> > 162000, 216000, 243000, 270000, 324000, 432000, 540000 >> >> -- >> Jani Nikula, Intel Open Source Graphics Center -- Jani Nikula, Intel Open Source Graphics Center