From patchwork Fri Nov 17 15:09:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Imre Deak X-Patchwork-Id: 13459026 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 DE9AAC072A2 for ; Fri, 17 Nov 2023 15:09:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id AF28710E1A2; Fri, 17 Nov 2023 15:09:34 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) by gabe.freedesktop.org (Postfix) with ESMTPS id CF2E010E143; Fri, 17 Nov 2023 15:09:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1700233772; x=1731769772; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=+vYYNyGcEn1OJW4lUIYOH8tRmbY/QIjCW3rh3AetBao=; b=QmmZE5K2tE92WR9lhR54enCP5Z6K3ZWjedN2TX6AGWKg2EyfqWq59kk5 7SBX/74lSj31ZOKRNU6ItBiDh9Noiw59GmSGx9rkFpVJxWIeQcyfIunb5 oOXpYsFGbzIvZ0r6csuyaWWpyAlZZXF+hQ+NSpZX68ALClezVnkaNCevA /o4Q73QJOPH84TxS8XS8IrgmLals7Inv6QCGtKOQoxm+74XbQH2dukZOf 2zKMZ/XoftQt8s150GA/pQfr22c5csO+n3KzNL/NVK3EoQPVzn097O5bl wey8sSyDo3Oq1080o8Rp7Dm+KDuLeGPO4Btevu+3CLvIuYCxD0DA9fX6n A==; X-IronPort-AV: E=McAfee;i="6600,9927,10897"; a="4398359" X-IronPort-AV: E=Sophos;i="6.04,206,1695711600"; d="scan'208";a="4398359" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Nov 2023 07:09:32 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10897"; a="765655645" X-IronPort-AV: E=Sophos;i="6.04,206,1695711600"; d="scan'208";a="765655645" Received: from ideak-desk.fi.intel.com ([10.237.72.78]) by orsmga002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Nov 2023 07:09:31 -0800 From: Imre Deak To: intel-gfx@lists.freedesktop.org Date: Fri, 17 Nov 2023 17:09:28 +0200 Message-Id: <20231117150929.1767227-2-imre.deak@intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231116131841.1588781-4-imre.deak@intel.com> References: <20231116131841.1588781-4-imre.deak@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v3 03/11] drm/dp_mst: Add kunit tests for drm_dp_get_vc_payload_bw() 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: dri-devel@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Add kunit test cases for drm_dp_get_vc_payload_bw() with all the DP1.4 and UHBR link configurations. v2: - List test cases in decreasing rate,lane count order matching the corresponding DP Standard tables. (Ville) - Add references to the DP Standard tables. Cc: Ville Syrjälä Cc: Lyude Paul Cc: dri-devel@lists.freedesktop.org Signed-off-by: Imre Deak --- .../gpu/drm/tests/drm_dp_mst_helper_test.c | 146 ++++++++++++++++++ 1 file changed, 146 insertions(+) diff --git a/drivers/gpu/drm/tests/drm_dp_mst_helper_test.c b/drivers/gpu/drm/tests/drm_dp_mst_helper_test.c index e3c818dfc0e6d..df3f703e4f09a 100644 --- a/drivers/gpu/drm/tests/drm_dp_mst_helper_test.c +++ b/drivers/gpu/drm/tests/drm_dp_mst_helper_test.c @@ -68,6 +68,151 @@ static void dp_mst_calc_pbn_mode_desc(const struct drm_dp_mst_calc_pbn_mode_test KUNIT_ARRAY_PARAM(drm_dp_mst_calc_pbn_mode, drm_dp_mst_calc_pbn_mode_cases, dp_mst_calc_pbn_mode_desc); +struct drm_dp_mst_calc_pbn_div_test { + int link_rate; + int lane_count; + fixed20_12 expected; +}; + +#define fp_init(__int, __frac) { \ + .full = (__int) * (1 << 12) + \ + (__frac) * (1 << 12) / 100000 \ +} + +static const struct drm_dp_mst_calc_pbn_div_test drm_dp_mst_calc_pbn_div_dp1_4_cases[] = { + /* + * UHBR rates: (DP Standard v2.1 2.7.6.3) + * .expected = .link_rate * .lane_count * 0.9671 / 8 / 54 / 100 + * DP1.4 rates: (DP Standard v2.1 2.6.4.2) + * .expected = .link_rate * .lane_count * 0.8000 / 8 / 54 / 100 + * + * truncated to 5 decimal places. + */ + { + .link_rate = 2000000, + .lane_count = 4, + .expected = fp_init(179, 9259), /* 179.09259 */ + }, + { + .link_rate = 2000000, + .lane_count = 2, + .expected = fp_init(89, 54629), + }, + { + .link_rate = 2000000, + .lane_count = 1, + .expected = fp_init(44, 77314), + }, + { + .link_rate = 1000000, + .lane_count = 4, + .expected = fp_init(89, 54629), + }, + { + .link_rate = 1000000, + .lane_count = 2, + .expected = fp_init(44, 77314), + }, + { + .link_rate = 1000000, + .lane_count = 1, + .expected = fp_init(22, 38657), + }, + { + .link_rate = 1350000, + .lane_count = 4, + .expected = fp_init(120, 88750), + }, + { + .link_rate = 1350000, + .lane_count = 2, + .expected = fp_init(60, 44375), + }, + { + .link_rate = 1350000, + .lane_count = 1, + .expected = fp_init(30, 22187), + }, + { + .link_rate = 810000, + .lane_count = 4, + .expected = fp_init(60, 0), + }, + { + .link_rate = 810000, + .lane_count = 2, + .expected = fp_init(30, 0), + }, + { + .link_rate = 810000, + .lane_count = 1, + .expected = fp_init(15, 0), + }, + { + .link_rate = 540000, + .lane_count = 4, + .expected = fp_init(40, 0), + }, + { + .link_rate = 540000, + .lane_count = 2, + .expected = fp_init(20, 0), + }, + { + .link_rate = 540000, + .lane_count = 1, + .expected = fp_init(10, 0), + }, + { + .link_rate = 270000, + .lane_count = 4, + .expected = fp_init(20, 0), + }, + { + .link_rate = 270000, + .lane_count = 2, + .expected = fp_init(10, 0), + }, + { + .link_rate = 270000, + .lane_count = 1, + .expected = fp_init(5, 0), + }, + { + .link_rate = 162000, + .lane_count = 4, + .expected = fp_init(12, 0), + }, + { + .link_rate = 162000, + .lane_count = 2, + .expected = fp_init(6, 0), + }, + { + .link_rate = 162000, + .lane_count = 1, + .expected = fp_init(3, 0), + }, +}; + +static void drm_test_dp_mst_calc_pbn_div(struct kunit *test) +{ + const struct drm_dp_mst_calc_pbn_div_test *params = test->param_value; + /* mgr->dev is only needed by drm_dbg_kms(), but it's not called for the test cases. */ + struct drm_dp_mst_topology_mgr mgr = {}; + + KUNIT_EXPECT_EQ(test, drm_dp_get_vc_payload_bw(&mgr, params->link_rate, params->lane_count).full, + params->expected.full); +} + +static void dp_mst_calc_pbn_div_desc(const struct drm_dp_mst_calc_pbn_div_test *t, char *desc) +{ + sprintf(desc, "Link rate %d lane count %d", t->link_rate, t->lane_count); +} + +KUNIT_ARRAY_PARAM(drm_dp_mst_calc_pbn_div, drm_dp_mst_calc_pbn_div_dp1_4_cases, + dp_mst_calc_pbn_div_desc); + static u8 data[] = { 0xff, 0x00, 0xdd }; struct drm_dp_mst_sideband_msg_req_test { @@ -416,6 +561,7 @@ KUNIT_ARRAY_PARAM(drm_dp_mst_sideband_msg_req, drm_dp_mst_sideband_msg_req_cases static struct kunit_case drm_dp_mst_helper_tests[] = { KUNIT_CASE_PARAM(drm_test_dp_mst_calc_pbn_mode, drm_dp_mst_calc_pbn_mode_gen_params), + KUNIT_CASE_PARAM(drm_test_dp_mst_calc_pbn_div, drm_dp_mst_calc_pbn_div_gen_params), KUNIT_CASE_PARAM(drm_test_dp_mst_sideband_msg_req_decode, drm_dp_mst_sideband_msg_req_gen_params), { }