From patchwork Tue Dec 1 19:04:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Shankar, Uma" X-Patchwork-Id: 11943445 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DEBB1C64E7B for ; Tue, 1 Dec 2020 18:30:33 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 395E420870 for ; Tue, 1 Dec 2020 18:30:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 395E420870 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6EF266E842; Tue, 1 Dec 2020 18:30:32 +0000 (UTC) Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id AF36B6E554 for ; Tue, 1 Dec 2020 18:30:31 +0000 (UTC) IronPort-SDR: nYjJ34m4WsPnADzlD8LprdMsO8/YwB5CJ89vh365jMxgjurGdDan3PCqmGGaCAkn5+Xrt24k6M YOMgXtakDP7Q== X-IronPort-AV: E=McAfee;i="6000,8403,9822"; a="234487933" X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="234487933" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 10:30:30 -0800 IronPort-SDR: 0JLYCgVEOywSQ8JItMS/L3Fj7NiFTydTQRMyxhIYYV6sLtF8xVQ6QrU7nFI441aJ5TX/Bv1++L 0viy89cxQigA== X-IronPort-AV: E=Sophos;i="5.78,385,1599548400"; d="scan'208";a="405220272" Received: from linux-desktop.iind.intel.com ([10.223.34.173]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2020 10:30:28 -0800 From: Uma Shankar To: intel-gfx@lists.freedesktop.org Date: Wed, 2 Dec 2020 00:34:05 +0530 Message-Id: <20201201190406.1752-2-uma.shankar@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201201190406.1752-1-uma.shankar@intel.com> References: <20201201190406.1752-1-uma.shankar@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [v6 1/2] drm/i915/display/tgl: Disable FBC with PSR2 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" There are some corner cases wrt underrun when we enable FBC with PSR2 on TGL. Recommendation from hardware is to keep this combination disabled. Bspec: 50422 HSD: 14010260002 v2: Added psr2 enabled check from crtc_state (Anshuman) Added Bspec link and HSD referneces (Jose) v3: Moved the logic to disable fbc to intel_fbc_update_state_cache and removed the crtc->config usages, as per Ville's recommendation. v4: Introduced a variable in fbc state_cache instead of the earlier plane.visible WA, as suggested by Jose. v5: Dropped an extra check for fbc in intel_fbc_enable and addressed review comments by Jose. v6: Move WA to end of function and added Jose's RB. Signed-off-by: Uma Shankar Reviewed-by: José Roberto de Souza --- drivers/gpu/drm/i915/display/intel_fbc.c | 12 ++++++++++++ drivers/gpu/drm/i915/i915_drv.h | 1 + 2 files changed, 13 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c index a5b072816a7b..f5d5a648cb22 100644 --- a/drivers/gpu/drm/i915/display/intel_fbc.c +++ b/drivers/gpu/drm/i915/display/intel_fbc.c @@ -742,6 +742,8 @@ static void intel_fbc_update_state_cache(struct intel_crtc *crtc, cache->fence_id = plane_state->vma->fence->id; else cache->fence_id = -1; + + cache->psr2_active = crtc_state->has_psr2; } static bool intel_fbc_cfb_size_changed(struct drm_i915_private *dev_priv) @@ -914,6 +916,16 @@ static bool intel_fbc_can_activate(struct intel_crtc *crtc) return false; } + /* + * Tigerlake is not supporting FBC with PSR2. + * Recommendation is to keep this combination disabled + * Bspec: 50422 HSD: 14010260002 + */ + if (fbc->state_cache.psr2_active && IS_TIGERLAKE(dev_priv)) { + fbc->no_fbc_reason = "not supported with PSR2"; + return false; + } + return true; } diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 15be8debae54..f4e08c1a5867 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -416,6 +416,7 @@ struct intel_fbc { u16 gen9_wa_cfb_stride; u16 interval; s8 fence_id; + bool psr2_active; } state_cache; /*