From patchwork Tue Nov 12 08:50:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mitul Golani X-Patchwork-Id: 13871925 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 2ADF1D41D71 for ; Tue, 12 Nov 2024 08:48:44 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6C9EF10E595; Tue, 12 Nov 2024 08:48:43 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="nAYrFoPm"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.16]) by gabe.freedesktop.org (Postfix) with ESMTPS id 219D410E599; Tue, 12 Nov 2024 08:48:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1731401322; x=1762937322; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=tJw5jf1UwoQWtl7pacdbkG0EI6YvziiwFxYbm8gv/DY=; b=nAYrFoPmV/FWeW7VHfyXduwZWI0Mr6D3M3nvAeukOZ7AkIqKG3G9zgGc uXzjWsULHGiCsVh5sT5rypjhxozMqORSdnolVqQ2657SypfVUttb5PmoX zaOQaLnoOGBHk2FtGayJsqqQz5wGda44RCcb1J2+ZYELouuM0vacyNeYD SSZZ204BZJBkzh+o09tYUcG93ncqvorw86Q33y+bf9j+sFhGODLVUcYbE mFJxNWVk1zG7lepG8sO5dBnaEu9M/I1NuhhjHjVPxL+SI2SBqX15ZFFvI BRwJpYTws5/JDUY0BhGPsoz3V3PxziJoxsoPllgxaPS7X6x8gMl+sy2gw A==; X-CSE-ConnectionGUID: sZFsYTpxTmemv35JiBW+/w== X-CSE-MsgGUID: EaKLiM+jSDanXrspsRI8RA== X-IronPort-AV: E=McAfee;i="6700,10204,11253"; a="18835736" X-IronPort-AV: E=Sophos;i="6.12,147,1728975600"; d="scan'208";a="18835736" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Nov 2024 00:48:42 -0800 X-CSE-ConnectionGUID: JXaSEMBGQnSb8p65rLFoyg== X-CSE-MsgGUID: az6ionaLRTmFOnZG/h3snQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,147,1728975600"; d="scan'208";a="87759860" Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by fmviesa009.fm.intel.com with ESMTP; 12 Nov 2024 00:48:41 -0800 From: Mitul Golani To: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org Subject: [RFC v1 1/4] drm/i915/scaler: Calculate scaler prefill latency Date: Tue, 12 Nov 2024 14:20:36 +0530 Message-ID: <20241112085039.1258860-2-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20241112085039.1258860-1-mitulkumar.ajitkumar.golani@intel.com> References: <20241112085039.1258860-1-mitulkumar.ajitkumar.golani@intel.com> 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" Calculate scaler prefill latency which accounts for time for each scaler in pipeline. Signed-off-by: Mitul Golani --- drivers/gpu/drm/i915/display/skl_scaler.c | 39 +++++++++++++++++++++++ drivers/gpu/drm/i915/display/skl_scaler.h | 1 + 2 files changed, 40 insertions(+) diff --git a/drivers/gpu/drm/i915/display/skl_scaler.c b/drivers/gpu/drm/i915/display/skl_scaler.c index 7dbc99b02eaa..eec4a5f783fa 100644 --- a/drivers/gpu/drm/i915/display/skl_scaler.c +++ b/drivers/gpu/drm/i915/display/skl_scaler.c @@ -6,6 +6,7 @@ #include "i915_reg.h" #include "intel_de.h" #include "intel_display_types.h" +#include "intel_crtc.h" #include "intel_fb.h" #include "skl_scaler.h" #include "skl_universal_plane.h" @@ -839,3 +840,41 @@ void skl_scaler_get_config(struct intel_crtc_state *crtc_state) else scaler_state->scaler_users &= ~(1 << SKL_CRTC_INDEX); } + +int skl_calc_scaler_prefill_latency(struct intel_crtc_state *crtc_state) +{ + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct intel_plane *plane = to_intel_plane(crtc->base.primary); + const struct intel_plane_state *plane_state = to_intel_plane_state(plane->base.state); + struct intel_crtc_scaler_state *scaler_state = &crtc_state->scaler_state; + int scaler_prefill_latency[2]; + int num_scaler_in_use, count, hscale, vscale, tot_scaler_prefill_usec; + int hscan_time = DIV_ROUND_UP(crtc_state->hw.adjusted_mode.htotal * 1000, + crtc_state->hw.adjusted_mode.crtc_clock); + + for (count = 0; count < crtc->num_scalers; count++) + if (scaler_state->scalers[count].in_use) + num_scaler_in_use++; + + if (!num_scaler_in_use) + return 0; + + if (num_scaler_in_use == 2) { + hscale = drm_rect_calc_hscale(&plane_state->uapi.src, + &plane_state->uapi.dst, + 0, INT_MAX); + vscale = drm_rect_calc_vscale(&plane_state->uapi.src, + &plane_state->uapi.dst, + 0, INT_MAX); + scaler_prefill_latency[1] = 4 * hscan_time * hscale * vscale; + } + + /* + * FIXME : When only 1 scaler used, 1st scaler can be downscale/upscale + */ + scaler_prefill_latency[0] = 4 * hscan_time; + tot_scaler_prefill_usec = scaler_prefill_latency[0] + scaler_prefill_latency[1]; + + return intel_usecs_to_scanlines(&crtc_state->hw.adjusted_mode, + tot_scaler_prefill_usec); +} diff --git a/drivers/gpu/drm/i915/display/skl_scaler.h b/drivers/gpu/drm/i915/display/skl_scaler.h index 63f93ca03c89..cd4d961d3b02 100644 --- a/drivers/gpu/drm/i915/display/skl_scaler.h +++ b/drivers/gpu/drm/i915/display/skl_scaler.h @@ -34,4 +34,5 @@ void skl_scaler_disable(const struct intel_crtc_state *old_crtc_state); void skl_scaler_get_config(struct intel_crtc_state *crtc_state); +int skl_calc_scaler_prefill_latency(struct intel_crtc_state *crtc_state); #endif