From patchwork Thu Jan 18 23:17:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinay Belgaumkar X-Patchwork-Id: 13523256 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 17BA3C47DAF for ; Thu, 18 Jan 2024 23:20:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E513610E930; Thu, 18 Jan 2024 23:19:56 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3C92710E92D; Thu, 18 Jan 2024 23:19:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1705619996; x=1737155996; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=AiRsb1h9NwKiQPU+CJQovyxYTdeMA4YDTY2dLwm3+jQ=; b=VKw0IX4QEVfJ6j3bsyTKqPcYKSh9QWCKYiBXyp+FolmfM0sUpgL9+Hzg yK5fFvBU5tunNLN/FLKDhBKjcyMpMpgQvDoRWp/taA5hJx4NjE0GdRODj RlOrtA8B1x175U36DXXbKcpUqpYLw24CRlhnaBAfVmcjNW2dCwZcGKI5N l/zLEfhY2q+u5mWSCGUH3N3azwQqTZJ+UTGdv9FHZgxGg2xd6fR7KkgqL rqyoWiat1TGqOhxDMZNl0bLtWt/3fT/6R0Bkydyr3uwwVjavN2uJ3TTCw GX6Ipt4XFTL3OBC0pMQge11LH89aKQVjTUf6ag706yRt5WEDxA7gnTUpn g==; X-IronPort-AV: E=McAfee;i="6600,9927,10956"; a="7296631" X-IronPort-AV: E=Sophos;i="6.05,203,1701158400"; d="scan'208";a="7296631" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Jan 2024 15:19:56 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10956"; a="818913009" X-IronPort-AV: E=Sophos;i="6.05,203,1701158400"; d="scan'208";a="818913009" Received: from vbelgaum-ubuntu.fm.intel.com ([10.1.27.27]) by orsmga001.jf.intel.com with ESMTP; 18 Jan 2024 15:19:54 -0800 From: Vinay Belgaumkar To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH] drm/i915/mtl: Wake GT before sending H2G message Date: Thu, 18 Jan 2024 15:17:28 -0800 Message-Id: <20240118231728.3817168-1-vinay.belgaumkar@intel.com> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Vinay Belgaumkar Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Instead of waiting until the interrupt reaches GuC, we can grab a forcewake while triggering the H2G interrupt. GEN11_GUC_HOST_INTERRUPT is inside an "always on" domain with respect to RC6. However, there could be some delays when platform is entering/exiting some higher level platform sleep states and a H2G is triggered. A forcewake ensures those sleep states have been fully exited and further processing occurs as expected. This will have an official WA soon so adding a FIXME in the comments. Signed-off-by: Vinay Belgaumkar Reviewed-by: Matt Roper --- drivers/gpu/drm/i915/intel_uncore.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index dfefad5a5fec..121458a31886 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -1800,7 +1800,10 @@ static const struct intel_forcewake_range __mtl_fw_ranges[] = { GEN_FW_RANGE(0x24000, 0x2ffff, 0), /* 0x24000 - 0x2407f: always on 0x24080 - 0x2ffff: reserved */ - GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_GT) + GEN_FW_RANGE(0x30000, 0x3ffff, FORCEWAKE_GT), + GEN_FW_RANGE(0x40000, 0x1901ec, 0), + GEN_FW_RANGE(0x1901f0, 0x1901f0, FORCEWAKE_GT) + /* FIXME: WA to wake GT while triggering H2G */ }; /*