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 3B3D3C02185 for ; Wed, 15 Jan 2025 15:22:54 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 07F1A10E787; Wed, 15 Jan 2025 15:22:54 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="CZQ0V1FX"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.13]) by gabe.freedesktop.org (Postfix) with ESMTPS id 32E8E10E738 for ; Wed, 15 Jan 2025 15:22:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1736954572; x=1768490572; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=nihD+WgmgQqrBHx1J26UZNpRpsaMhOyRdWuSmfm//YE=; b=CZQ0V1FXbYmHpt4tWVUttomTqJnRHDQmcX+J18htrzGN9Axn2QwVS77o xPIHxXUKUXj3dKWT430N0i/Q2aVoyEwG/wdQ5a5XY5dmZc/Wil1PGyiga AJ4VNo8/D2Bfz0J9LQ/jPD2o2iP208sIv2cfaKttVPmOB7C77zz8jn9fA Ra1AfIcQ8hRtFcJdN7uMBOb41wUmsBYY5Sowj7r01zWQyf18CngBvZh/y FOXS/mhoi6orBUhH5S0Z4qm9hYiNMjs5hgQu7E+je90+HDKBp0Xi3JIfV oA5vdBb7G4hFkoPcybu4LGJ3MS9A6111acZ/D1mjEyzEGdrfwsEbLB7y3 Q==; X-CSE-ConnectionGUID: mt7utHV+QeaxH/lQDOCs2A== X-CSE-MsgGUID: r18N5GLFTAGGTslpl8AnSw== X-IronPort-AV: E=McAfee;i="6700,10204,11316"; a="40106966" X-IronPort-AV: E=Sophos;i="6.13,206,1732608000"; d="scan'208";a="40106966" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Jan 2025 07:22:52 -0800 X-CSE-ConnectionGUID: zf+91IIRSHSbxrRpYLcnfQ== X-CSE-MsgGUID: V7K0/9AdSImFXxVoF+2FmQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.13,206,1732608000"; d="scan'208";a="110147945" Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by orviesa004.jf.intel.com with ESMTP; 15 Jan 2025 07:22:51 -0800 From: Mitul Golani To: intel-xe@lists.freedesktop.org Subject: [PATCH v5 7/7] drm/i915/dsc: Check if vblank is sufficient for dsc prefill Date: Wed, 15 Jan 2025 20:49:30 +0530 Message-ID: <20250115151930.3665295-8-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.48.0 In-Reply-To: <20250115151930.3665295-1-mitulkumar.ajitkumar.golani@intel.com> References: <20250115151930.3665295-1-mitulkumar.ajitkumar.golani@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" High refresh rate panels which may have small line times and vblank sizes, Check if vblank size is sufficient for dsc prefill latency. Bspec: 70151 --v2: - Consider chroma downscaling factor in latency calculation. [Ankit] - Replace with appropriate function name. --v3: - Remove FIXME tag.[Ankit] - Replace Ycbcr444 to Ycbcr420.[Anit] - Correct precision. [Ankit] - Use some local valiables like linetime_factor and latency to adjust precision. - Declare latency to 0 initially to avoid returning any garbage values. - Account for second scaler downscaling factor as well. [Ankit] --v4: - Improvise hscale and vscale calculation. [Ankit] - Use appropriate name for number of scaler users. [Ankit] - Update commit message and rebase. - Add linetime and cdclk prefill adjustment calculation. [Ankit] Signed-off-by: Mitul Golani --- drivers/gpu/drm/i915/display/skl_watermark.c | 35 +++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c index ca9d5677c356..13666adb8e36 100644 --- a/drivers/gpu/drm/i915/display/skl_watermark.c +++ b/drivers/gpu/drm/i915/display/skl_watermark.c @@ -2307,6 +2307,39 @@ cdclk_prefill_adjustment(const struct intel_crtc_state *crtc_state) 2 * cdclk_state->logical.cdclk)); } +static int +dsc_prefill_latency(const struct intel_crtc_state *crtc_state) +{ + const struct intel_crtc_scaler_state *scaler_state = + &crtc_state->scaler_state; + int latency = 0; + int num_scaler_users = hweight32(scaler_state->scaler_users); + int chroma_downscaling_factor = + crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 ? 2 : 1; + long long hscale_k[2] = {0, 0}; + long long vscale_k[2] = {0, 0}; + + if (!crtc_state->dsc.compression_enable || !num_scaler_users) + return latency; + + for (int i = 0; i < num_scaler_users; i++) { + hscale_k[i] = + max(1000, mul_u32_u32(scaler_state->scalers[i].hscale, 1000) >> 16); + vscale_k[i] = + max(1000, mul_u32_u32(scaler_state->scalers[i].vscale, 1000) >> 16); + } + + latency = DIV_ROUND_UP_ULL(hscale_k[0] * vscale_k[0], 1000000); + + if (num_scaler_users > 1) + latency *= DIV_ROUND_UP_ULL(hscale_k[1] * vscale_k[1], 1000000); + + latency *= DIV_ROUND_UP(15 * crtc_state->linetime, 10) * chroma_downscaling_factor * + cdclk_prefill_adjustment(crtc_state); + + return latency; +} + static int scaler_prefill_latency(const struct intel_crtc_state *crtc_state) { @@ -2347,10 +2380,10 @@ skl_is_vblank_too_short(const struct intel_crtc_state *crtc_state, const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; - /* FIXME missing scaler and DSC pre-fill time */ return crtc_state->framestart_delay + intel_usecs_to_scanlines(adjusted_mode, latency) + scaler_prefill_latency(crtc_state) + + dsc_prefill_latency(crtc_state) + wm0_lines > adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vblank_start; } -- 2.48.0