From patchwork Wed Apr 3 10:51:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Vivekanandan, Balasubramani" X-Patchwork-Id: 13615853 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 163CFCD128A for ; Wed, 3 Apr 2024 10:52:13 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 439931129C8; Wed, 3 Apr 2024 10:52:12 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="CSA87xpW"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) by gabe.freedesktop.org (Postfix) with ESMTPS id AA0AF1129C8; Wed, 3 Apr 2024 10:52:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1712141532; x=1743677532; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=FINeNM6a8wAVXpANxBlkkzG2OA91ebVvYgbdjlA9008=; b=CSA87xpWgtnPQCtzTOs5gu125E5Eedrpjcr2xnMDvbwyh+N/Nc3kNwhB 2HuPdrPBiB4DZglVFF1fMmm9hPg/+noUYcQYMk+Wi669xrCdWZ9xJWeyZ FnZkJP8IkkpsH2M0rE0MogyD9sP870DdjlOGY4/N+V8rFBh7x6Hjsipu6 qGE8RV6zoTdDsmCr/e65YqYzwtl+SfH0S1zBJECebi+2owF6MXrAgocFX eRffh9Vpe3GY612Q+rN8HsdrAicbIORChhc2wUtIY6YiIkGzTxa+twfNb 7xrD7+/jXJFiYsNWgIRc6F8EELVbbWB93djgkDTOS84mRo/lCuC6Gp7h4 w==; X-CSE-ConnectionGUID: Mrb2ycJpS1iyqo4gQD91Uw== X-CSE-MsgGUID: ArUCLR0FRqKVXMg64I3B7A== X-IronPort-AV: E=McAfee;i="6600,9927,11032"; a="7212207" X-IronPort-AV: E=Sophos;i="6.07,177,1708416000"; d="scan'208";a="7212207" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Apr 2024 03:51:49 -0700 X-CSE-ConnectionGUID: Ma4WpeDMToid7wjolMbsdw== X-CSE-MsgGUID: f6YnRGLLSr6eBUz+nmWq6g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,177,1708416000"; d="scan'208";a="18493403" Received: from bvivekan-desk.iind.intel.com ([10.190.238.63]) by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Apr 2024 03:51:46 -0700 From: Balasubramani Vivekanandan To: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org Cc: Matt Roper , Lucas De Marchi , Balasubramani Vivekanandan Subject: [PATCH 17/25] drm/i915/xe2hpd: Add max memory bandwidth algorithm Date: Wed, 3 Apr 2024 16:21:15 +0530 Message-Id: <20240403105123.1327669-18-balasubramani.vivekanandan@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240403105123.1327669-1-balasubramani.vivekanandan@intel.com> References: <20240403105123.1327669-1-balasubramani.vivekanandan@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" From: Matt Roper Unlike DG2, Xe2_HPD does support multiple GV points with different maximum memory bandwidths, but uses a much simpler algorithm than igpu platforms use. Bspec: 64631 Signed-off-by: Matt Roper Signed-off-by: Balasubramani Vivekanandan --- drivers/gpu/drm/i915/display/intel_bw.c | 65 ++++++++++++++++++++++++- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/soc/intel_dram.c | 4 ++ 3 files changed, 68 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c index 7f2a50b4f494..dc9ac4831065 100644 --- a/drivers/gpu/drm/i915/display/intel_bw.c +++ b/drivers/gpu/drm/i915/display/intel_bw.c @@ -22,6 +22,8 @@ struct intel_qgv_point { u16 dclk, t_rp, t_rdpre, t_rc, t_ras, t_rcd; }; +#define DEPROGBWPCLIMIT 60 + struct intel_psf_gv_point { u8 clk; /* clock in multiples of 16.6666 MHz */ }; @@ -239,6 +241,9 @@ static int icl_get_qgv_points(struct drm_i915_private *dev_priv, qi->channel_width = 16; qi->deinterleave = 4; break; + case INTEL_DRAM_GDDR: + qi->channel_width = 32; + break; default: MISSING_CASE(dram_info->type); return -EINVAL; @@ -383,6 +388,12 @@ static const struct intel_sa_info mtl_sa_info = { .derating = 10, }; +static const struct intel_sa_info xe2_hpd_sa_info = { + .derating = 30, + .deprogbwlimit = 53, + /* Other values not used by simplified algorithm */ +}; + static int icl_get_bw_info(struct drm_i915_private *dev_priv, const struct intel_sa_info *sa) { struct intel_qgv_info qi = {}; @@ -489,7 +500,7 @@ static int tgl_get_bw_info(struct drm_i915_private *dev_priv, const struct intel dclk_max = icl_sagv_max_dclk(&qi); peakbw = num_channels * DIV_ROUND_UP(qi.channel_width, 8) * dclk_max; - maxdebw = min(sa->deprogbwlimit * 1000, peakbw * 6 / 10); /* 60% */ + maxdebw = min(sa->deprogbwlimit * 1000, peakbw * DEPROGBWPCLIMIT / 100); ipqdepth = min(ipqdepthpch, sa->displayrtids / num_channels); /* @@ -594,6 +605,54 @@ static void dg2_get_bw_info(struct drm_i915_private *i915) i915->display.sagv.status = I915_SAGV_NOT_CONTROLLED; } +static int xe2_hpd_get_bw_info(struct drm_i915_private *i915, + const struct intel_sa_info *sa) +{ + struct intel_qgv_info qi = {}; + int num_channels = i915->dram_info.num_channels; + int peakbw, maxdebw; + int ret, i; + + ret = icl_get_qgv_points(i915, &qi, true); + if (ret) { + drm_dbg_kms(&i915->drm, + "Failed to get memory subsystem information, ignoring bandwidth limits"); + return ret; + } + + peakbw = num_channels * qi.channel_width / 8 * icl_sagv_max_dclk(&qi); + maxdebw = min(sa->deprogbwlimit * 1000, peakbw * DEPROGBWPCLIMIT / 10); + + for (i = 0; i < qi.num_points; i++) { + const struct intel_qgv_point *point = &qi.points[i]; + int bw = num_channels * (qi.channel_width / 8) * point->dclk; + + i915->display.bw.max[0].deratedbw[i] = + min(maxdebw, (100 - sa->derating) * bw / 100); + i915->display.bw.max[0].peakbw[i] = bw; + + drm_dbg_kms(&i915->drm, "QGV %d: deratedbw=%u peakbw: %u\n", + i, i915->display.bw.max[0].deratedbw[i], + i915->display.bw.max[0].peakbw[i]); + } + + /* Bandwidth does not depend on # of planes; set all groups the same */ + i915->display.bw.max[0].num_planes = 1; + i915->display.bw.max[0].num_qgv_points = qi.num_points; + for (i = 1; i < ARRAY_SIZE(i915->display.bw.max); i++) + memcpy(&i915->display.bw.max[i], &i915->display.bw.max[0], + sizeof(i915->display.bw.max[0])); + + /* + * Xe2_HPD should always have exactly two QGV points representing + * battery and plugged-in operation. + */ + drm_WARN_ON(&i915->drm, qi.num_points != 2); + i915->display.sagv.status = I915_SAGV_ENABLED; + + return 0; +} + static unsigned int icl_max_bw_index(struct drm_i915_private *dev_priv, int num_planes, int qgv_point) { @@ -664,7 +723,9 @@ void intel_bw_init_hw(struct drm_i915_private *dev_priv) if (!HAS_DISPLAY(dev_priv)) return; - if (DISPLAY_VER(dev_priv) >= 14) + if (DISPLAY_VER_FULL(dev_priv) >= IP_VER(14, 1) && IS_DGFX(dev_priv)) + xe2_hpd_get_bw_info(dev_priv, &xe2_hpd_sa_info); + else if (DISPLAY_VER(dev_priv) >= 14) tgl_get_bw_info(dev_priv, &mtl_sa_info); else if (IS_DG2(dev_priv)) dg2_get_bw_info(dev_priv); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index b41a414079f4..eb3ad6ae0b2a 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -313,6 +313,7 @@ struct drm_i915_private { INTEL_DRAM_LPDDR4, INTEL_DRAM_DDR5, INTEL_DRAM_LPDDR5, + INTEL_DRAM_GDDR, } type; u8 num_qgv_points; u8 num_psf_gv_points; diff --git a/drivers/gpu/drm/i915/soc/intel_dram.c b/drivers/gpu/drm/i915/soc/intel_dram.c index 15492b69f698..99b541babb31 100644 --- a/drivers/gpu/drm/i915/soc/intel_dram.c +++ b/drivers/gpu/drm/i915/soc/intel_dram.c @@ -640,6 +640,10 @@ static int xelpdp_get_dram_info(struct drm_i915_private *i915) case 5: dram_info->type = INTEL_DRAM_LPDDR3; break; + case 8: + drm_WARN_ON(&i915->drm, !IS_DGFX(i915)); + dram_info->type = INTEL_DRAM_GDDR; + break; default: MISSING_CASE(val); return -EINVAL;