From patchwork Thu Feb 6 16:46:24 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Imre Deak X-Patchwork-Id: 13963330 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 A2C6AC02199 for ; Thu, 6 Feb 2025 16:45:29 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1705710E8DB; Thu, 6 Feb 2025 16:45:29 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="N14QSqZX"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0435610E8DA; Thu, 6 Feb 2025 16:45:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1738860328; x=1770396328; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=72qDJph2VVNqEuPxxa4obWeCgVeSgyO0EEXur/yN5Cg=; b=N14QSqZXvH4sKUxW+TsUegNvO7d652sLfLl4Q+4ohVfRrBbTndteLV0b +Fjbq1PhJuIRROZy2WaXpbwa2fyl0gjtaxu6vGYXjI/R3uL8TnAoAoQ4/ GkJkijYpid/AOV8S7+EnLKqpkLYWlJ4KktpolWpa1ycqv872YyAh6Tr1g mDKi7iZbLlE542EIem2KV9aeY6+gbAktL9QlE9iuFMNFPQ8bUtf8yvKay 2MHTIhi0HOBA+9vL3yyG+At/3AhNNkBmk7aJvdWXu0idOry7LFo9M85Ji /1hhQr5ZWLJVfx3vuWTeWbA4ouDs7DSI41IX0MsKFMnBbOo7RV+LVi8ZZ A==; X-CSE-ConnectionGUID: pmDyT95hRSSvaeKn5CMF0A== X-CSE-MsgGUID: Qe5fhAtqTXih5Gbozc9rtA== X-IronPort-AV: E=McAfee;i="6700,10204,11336"; a="39499285" X-IronPort-AV: E=Sophos;i="6.13,264,1732608000"; d="scan'208";a="39499285" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Feb 2025 08:45:28 -0800 X-CSE-ConnectionGUID: mcC3rC1XRSGvslih8P6fvg== X-CSE-MsgGUID: +EwGtkjGRxyZRP8BvPHoKQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.13,264,1732608000"; d="scan'208";a="116288409" Received: from ideak-desk.fi.intel.com ([10.237.72.78]) by fmviesa004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Feb 2025 08:45:26 -0800 From: Imre Deak To: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org Cc: Arun R Murthy , Suraj Kandpal Subject: [PATCH] drm/i915/dp_mst: Fix disabling the minimum HBlank time Date: Thu, 6 Feb 2025 18:46:24 +0200 Message-ID: <20250206164624.3185280-1-imre.deak@intel.com> X-Mailer: git-send-email 2.44.2 MIME-Version: 1.0 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" Disable the minimum HBlank time only on LNL+, where this functionality and corresponding register exists. Fixes: a5ebe00c2ace ("drm/i915/dp: Guarantee a minimum HBlank time") Cc: Arun R Murthy Cc: Suraj Kandpal Signed-off-by: Imre Deak Reviewed-by: Suraj Kandpal --- drivers/gpu/drm/i915/display/intel_dp_mst.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index ae2db983eff92..459440dd6e879 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -1006,7 +1006,8 @@ static void mst_stream_disable(struct intel_atomic_state *state, intel_dp_sink_disable_decompression(state, connector, old_crtc_state); - intel_de_write(display, DP_MIN_HBLANK_CTL(trans), 0x00); + if (DISPLAY_VER(display) >= 20) + intel_de_write(display, DP_MIN_HBLANK_CTL(trans), 0); } static void mst_stream_post_disable(struct intel_atomic_state *state,