From patchwork Wed Apr 26 13:06:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Govindapillai, Vinod" X-Patchwork-Id: 13224605 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 1FB47C77B60 for ; Wed, 26 Apr 2023 13:06:57 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 88F0D10E996; Wed, 26 Apr 2023 13:06:56 +0000 (UTC) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id B026710E994 for ; Wed, 26 Apr 2023 13:06:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1682514410; x=1714050410; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=UDwm3z68FKPhUJB0nQF8dzBOQ86+So9SR9lQwOeqYR8=; b=VPAvsbNPbG6+EQpINZZlVDhBJNMT9d66nm9rk9S/bQHGBECMUHRj/IMU ab2IVK0ZevtjgeR4AOzGQ5jsqwfmkVF9ufe33Qyk8CABwvXTY984pf3mF blEeRZyl5m31qVb24s7hvTRJEzp92+1Hv8KUHs0eklgefl5xuzXey4jma PFQ+AWK3qod3esCXgwbtR36z5XmEXgBZwL7TQrqURyzFcniX3OHc4JHtC znRysrTdwsNPlFVlOmBl68byNFsLWUgoAfvvB75WM8N7nyQ1ePRPw7gJP DshnD/e94E7HKa3sUu3vqoGIlEL1WotO9AdtQu2G/CyuHOOXkT6umYbKD w==; X-IronPort-AV: E=McAfee;i="6600,9927,10691"; a="336014007" X-IronPort-AV: E=Sophos;i="5.99,228,1677571200"; d="scan'208,223";a="336014007" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Apr 2023 06:06:50 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10691"; a="1023612224" X-IronPort-AV: E=Sophos;i="5.99,228,1677571200"; d="scan'208,223";a="1023612224" Received: from aeherrer-mobl2.amr.corp.intel.com (HELO vgovind2-mobl3.intel.com) ([10.249.37.76]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Apr 2023 06:06:47 -0700 From: Vinod Govindapillai To: intel-gfx@lists.freedesktop.org Date: Wed, 26 Apr 2023 16:06:17 +0300 Message-Id: <20230426130619.1227635-7-vinod.govindapillai@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230426130619.1227635-1-vinod.govindapillai@intel.com> References: <20230426130619.1227635-1-vinod.govindapillai@intel.com> MIME-Version: 1.0 Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Subject: [Intel-gfx] [PATCH v3 6/8] drm/i915/mtl: find best QGV point and configure sagv 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: , Cc: ville.syrjala@intel.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From MTL onwards, we need to find the best QGV point based on the required data rate and pass the peak BW of that point to the punit to lock the corresponding QGV point. Bspec: 64636 Signed-off-by: Vinod Govindapillai --- drivers/gpu/drm/i915/display/intel_bw.c | 87 ++++++++++++++++++++++++- drivers/gpu/drm/i915/display/intel_bw.h | 6 ++ 2 files changed, 91 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c index a7f501131bb6..70fa469c3c20 100644 --- a/drivers/gpu/drm/i915/display/intel_bw.c +++ b/drivers/gpu/drm/i915/display/intel_bw.c @@ -802,6 +802,85 @@ intel_atomic_get_bw_state(struct intel_atomic_state *state) return to_intel_bw_state(bw_state); } +static int mtl_find_qgv_points(struct drm_i915_private *i915, + unsigned int data_rate, + unsigned int num_active_planes, + const struct intel_bw_state *old_bw_state, + struct intel_bw_state *new_bw_state) +{ + unsigned int best_rate = UINT_MAX; + unsigned int num_qgv_points = i915->display.bw.max[0].num_qgv_points; + unsigned int qgv_peak_bw = 0; + int i; + int ret; + + ret = intel_atomic_lock_global_state(&new_bw_state->base); + if (ret) + return ret; + + /* + * If SAGV cannot be enabled, disable the pcode SAGV by passing all 1's + * for qgv peak bw in PM Demand request. So assign UINT_MAX if SAGV is + * not enabled. PM Demand code will clamp the value for the register + */ + if (!intel_can_enable_sagv(i915, new_bw_state)) { + new_bw_state->qgv_point_peakbw = UINT_MAX; + drm_dbg_kms(&i915->drm, "No SAGV, use UINT_MAX as peak bw."); + goto out; + } + + /* + * Find the best QGV point by comparing the data_rate with max data rate + * offered per plane group + */ + for (i = 0; i < num_qgv_points; i++) { + unsigned int bw_index = + tgl_max_bw_index(i915, num_active_planes, i); + unsigned int max_data_rate; + + if (bw_index > ARRAY_SIZE(i915->display.bw.max)) + continue; + + max_data_rate = i915->display.bw.max[bw_index].deratedbw[i]; + + if (max_data_rate < data_rate) + continue; + + if (max_data_rate - data_rate < best_rate) { + best_rate = max_data_rate - data_rate; + qgv_peak_bw = i915->display.bw.max[bw_index].peakbw[i]; + } + + drm_dbg_kms(&i915->drm, "QGV point %d: max bw %d required %d qgv_peak_bw: %d\n", + i, max_data_rate, data_rate, qgv_peak_bw); + } + + drm_dbg_kms(&i915->drm, "Matching peaks QGV bw: %d for required data rate: %d\n", + qgv_peak_bw, data_rate); + + /* + * The display configuration cannot be supported if no QGV point + * satisfying the require data rate is found + */ + if (qgv_peak_bw == 0) { + drm_dbg_kms(&i915->drm, "No QGV points for bw %d for display configuration(%d active planes).\n", + data_rate, num_active_planes); + return -EINVAL; + } + + /* MTL PM DEMAND expects QGV BW parameter in multiples of 100 mbps */ + new_bw_state->qgv_point_peakbw = qgv_peak_bw / 100; + +out: + if (new_bw_state->qgv_point_peakbw != old_bw_state->qgv_point_peakbw) { + ret = intel_atomic_serialize_global_state(&new_bw_state->base); + if (ret) + return ret; + } + + return 0; +} + static int icl_find_qgv_points(struct drm_i915_private *i915, unsigned int data_rate, unsigned int num_active_planes, @@ -927,8 +1006,12 @@ static int intel_bw_check_qgv_points(struct drm_i915_private *i915, data_rate = DIV_ROUND_UP(data_rate, 1000); - return icl_find_qgv_points(i915, data_rate, num_active_planes, - old_bw_state, new_bw_state); + if (DISPLAY_VER(i915) >= 14) + return mtl_find_qgv_points(i915, data_rate, num_active_planes, + old_bw_state, new_bw_state); + else + return icl_find_qgv_points(i915, data_rate, num_active_planes, + old_bw_state, new_bw_state); } static bool intel_bw_state_changed(struct drm_i915_private *i915, diff --git a/drivers/gpu/drm/i915/display/intel_bw.h b/drivers/gpu/drm/i915/display/intel_bw.h index f20292143745..fc32f1eace85 100644 --- a/drivers/gpu/drm/i915/display/intel_bw.h +++ b/drivers/gpu/drm/i915/display/intel_bw.h @@ -34,6 +34,12 @@ struct intel_bw_state { /* bitmask of active pipes */ u8 active_pipes; + /* + * From MTL onwards, to lock a QGV point, punit expects the peak BW of + * the selected QGV point as the parameter + */ + unsigned int qgv_point_peakbw; + /* * Current QGV points mask, which restricts * some particular SAGV states, not to confuse