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 E6406CCD19A for ; Thu, 16 Oct 2025 09:43:29 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A9B6010E9B8; Thu, 16 Oct 2025 09:43:29 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="VVOLEaJO"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) by gabe.freedesktop.org (Postfix) with ESMTPS id D06E310E98D; Thu, 16 Oct 2025 09:43:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1760607801; x=1792143801; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Lriz6LA0xBjVKPsyuaHUkN2urbx+Q43A+A2LhVtnzdM=; b=VVOLEaJOulPCMvDl1Vg2ccvuo2OvYoC7RrOWsPX/XuRovyB95Zxbdoal AP5KlbOF07MJAKeJejnC2jiiZQ0Pn05cFYpYwvWXvqYRuoWi949r713sN DbPDAGHY+M492E5yK32GJBDOC+EJSCF/HTVPeNRx9gIoRhYfNkm8OmM+K Z12waEq3uQa+ziXZDgpD8jLKMGz62EdVByFSyvm2CcA/kuT4Ta9L9trXi UuVB0tTGXFPU0cQIngKDST8Fj/2ylzvteXKBaEnApvZIDmRXuXpbSeM9r c4vWSSejIINNs16+tRodTTezHORze7e7bziESjaSTKlj7WGRdS1/uiKNg w==; X-CSE-ConnectionGUID: wrdqJyH2T9KGGycZyEd2Rg== X-CSE-MsgGUID: TZkHT4ROSBG1fuwjDeXp7w== X-IronPort-AV: E=McAfee;i="6800,10657,11531"; a="62725260" X-IronPort-AV: E=Sophos;i="6.17,312,1747724400"; d="scan'208";a="62725260" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Oct 2025 02:43:20 -0700 X-CSE-ConnectionGUID: lnAFOWoDT8md8U7VBU5tRA== X-CSE-MsgGUID: r4cac648QbyHuFjYMRJi/A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,233,1754982000"; d="scan'208";a="219570802" Received: from srr4-3-linux-103-aknautiy.iind.intel.com ([10.223.34.160]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Oct 2025 02:43:19 -0700 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org Cc: ville.syrjala@linux.intel.com, Ankit Nautiyal Subject: [PATCH 3/6] drm/i915/psr: Add helper to get min psr guardband Date: Thu, 16 Oct 2025 15:00:06 +0530 Message-ID: <20251016093009.2139105-4-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20251016093009.2139105-1-ankit.k.nautiyal@intel.com> References: <20251016093009.2139105-1-ankit.k.nautiyal@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" Introduce a helper to compute the max link wake latency when using Auxless/Aux wake mechanism for PSR/Panel Replay/LOBF features. This will be used to compute the minimum guardband so that the link wake latencies are accounted and these features work smoothly for higher refresh rate panels. Bspec: 70151, 71477 Signed-off-by: Ankit Nautiyal --- drivers/gpu/drm/i915/display/intel_psr.c | 12 ++++++++++++ drivers/gpu/drm/i915/display/intel_psr.h | 1 + 2 files changed, 13 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c index 703e5f6af04c..a8303b669853 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -4416,3 +4416,15 @@ void intel_psr_compute_config_late(struct intel_dp *intel_dp, intel_psr_set_non_psr_pipes(intel_dp, crtc_state); } + +int intel_psr_min_guardband(struct intel_crtc_state *crtc_state) +{ + struct intel_display *display = to_intel_display(crtc_state); + int auxless_wake_lines = crtc_state->alpm_state.aux_less_wake_lines; + int wake_lines = DISPLAY_VER(display) < 20 ? + psr2_block_count_lines(crtc_state->alpm_state.io_wake_lines, + crtc_state->alpm_state.fast_wake_lines) : + crtc_state->alpm_state.io_wake_lines; + + return max(auxless_wake_lines, wake_lines); +} diff --git a/drivers/gpu/drm/i915/display/intel_psr.h b/drivers/gpu/drm/i915/display/intel_psr.h index b17ce312dc37..620b35928832 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.h +++ b/drivers/gpu/drm/i915/display/intel_psr.h @@ -85,5 +85,6 @@ bool intel_psr_needs_alpm_aux_less(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state); void intel_psr_compute_config_late(struct intel_dp *intel_dp, struct intel_crtc_state *crtc_state); +int intel_psr_min_guardband(struct intel_crtc_state *crtc_state); #endif /* __INTEL_PSR_H__ */ -- 2.45.2