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From: Tales Aparecida <tales.aparecida@gmail.com>
To: "Alex Deucher" <alexander.deucher@amd.com>,
	"Christian König" <christian.koenig@amd.com>,
	"Pan, Xinhui" <Xinhui.Pan@amd.com>,
	"David Airlie" <airlied@linux.ie>,
	"Daniel Vetter" <daniel@ffwll.ch>,
	"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
	"Maxime Ripard" <mripard@kernel.org>,
	"Thomas Zimmermann" <tzimmermann@suse.de>,
	"Jonathan Corbet" <corbet@lwn.net>,
	"Harry Wentland" <harry.wentland@amd.com>,
	"Leo Li" <sunpeng.li@amd.com>,
	"Rodrigo Siqueira" <Rodrigo.Siqueira@amd.com>
Cc: siqueirajordao@riseup.net, magalilemes00@gmail.com,
	tales.aparecida@gmail.com, amd-gfx@lists.freedesktop.org,
	mwen@igalia.com, mairacanal@riseup.net,
	kunit-dev@googlegroups.com, Isabella Basso <isabbasso@riseup.net>,
	andrealmeid@riseup.net, Trevor Woerner <twoerner@gmail.com>
Subject: [PATCH 5/8] drm/amd/display: Introduce KUnit to dcn20/display_mode_vba_20 library
Date: Wed, 10 Aug 2022 21:40:07 -0300	[thread overview]
Message-ID: <20220811004010.61299-6-tales.aparecida@gmail.com> (raw)
In-Reply-To: <20220811004010.61299-1-tales.aparecida@gmail.com>

From: Maíra Canal <mairacanal@riseup.net>

The display_mode_vba_20 deals with hundreds of display parameters for
the DCN20 and sometimes does it in odd ways. The addition of unit tests
intends to assure the quality of the code delivered by HW engineers and,
also make it possible to refactor the code decreasing concerns about adding
bugs to the codebase.

Signed-off-by: Maíra Canal <mairacanal@riseup.net>
Signed-off-by: Tales Aparecida <tales.aparecida@gmail.com>
---
 .../dc/dml/dcn20/display_mode_vba_20.c        |   4 +
 .../dc/dml/dcn20/display_mode_vba_20_test.c   | 227 ++++++++++++++++++
 2 files changed, 231 insertions(+)
 create mode 100644 drivers/gpu/drm/amd/display/tests/dc/dml/dcn20/display_mode_vba_20_test.c

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20.c b/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20.c
index d3b5b6fedf04..738d8c1f5def 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20.c
@@ -5112,3 +5112,7 @@ void dml20_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
 				locals->OutputBppPerState[mode_lib->vba.VoltageLevel][k];
 	}
 }
+
+#if IS_ENABLED(CONFIG_DML_KUNIT_TEST)
+#include "../../tests/dc/dml/dcn20/display_mode_vba_20_test.c"
+#endif
diff --git a/drivers/gpu/drm/amd/display/tests/dc/dml/dcn20/display_mode_vba_20_test.c b/drivers/gpu/drm/amd/display/tests/dc/dml/dcn20/display_mode_vba_20_test.c
new file mode 100644
index 000000000000..7abaf0a8d50a
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/tests/dc/dml/dcn20/display_mode_vba_20_test.c
@@ -0,0 +1,227 @@
+// SPDX-License-Identifier: MIT
+/*
+ * KUnit tests for dml/dcn20/display_mode_vba_20.c
+ *
+ * Copyright (C) 2022, Maíra Canal <mairacanal@riseup.net>
+ */
+
+#include <kunit/test.h>
+#include "dml/display_mode_enums.h"
+
+static void DSC_compute_delay_test(struct kunit *test)
+{
+	/* 4:4:4 encoding */
+	KUNIT_EXPECT_EQ(test, dscComputeDelay(dm_444), 30);
+
+	/* 4:2:0 encoding */
+	KUNIT_EXPECT_EQ(test, dscComputeDelay(dm_420), 48);
+
+	/* 4:2:2 n-encoding */
+	KUNIT_EXPECT_EQ(test, dscComputeDelay(dm_n422), 49);
+
+	/* 4:2:2 s-encoding */
+	KUNIT_EXPECT_EQ(test, dscComputeDelay(dm_s422), 30);
+}
+
+static void calculate_TWait_test(struct kunit *test)
+{
+	/* Zeroed Prefetch Mode */
+
+	/* DRAMClockChangeLatency > UrgentLatencyPixelDataOnly > SREnterPlusExitTime*/
+	KUNIT_EXPECT_EQ(test, CalculateTWait(0, 1300000, 1200000, 1000000), 2500000);
+
+	/* DRAMClockChangeLatency > SREnterPlusExitTime > UrgentLatencyPixelDataOnly */
+	KUNIT_EXPECT_EQ(test, CalculateTWait(0, 1300000, 900000, 1200000), 2200000);
+
+	/* UrgentLatencyPixelDataOnly > DRAMClockChangeLatency > SREnterPlusExitTime */
+	KUNIT_EXPECT_EQ(test, CalculateTWait(0, 1000000, 2000000, 900000), 3000000);
+
+	/* UrgentLatencyPixelDataOnly > SREnterPlusExitTime > DRAMClockChangeLatency */
+	KUNIT_EXPECT_EQ(test, CalculateTWait(0, 1000000, 1200000, 1100000), 2200000);
+
+	/* SREnterPlusExitTime > DRAMClockChangeLatency > UrgentLatencyPixelDataOnly */
+	KUNIT_EXPECT_EQ(test, CalculateTWait(0, 1000000, 900000, 2000000), 2000000);
+
+	/* SREnterPlusExitTime > UrgentLatencyPixelDataOnly > DRAMClockChangeLatency */
+	KUNIT_EXPECT_EQ(test, CalculateTWait(0, 1000000, 1200000, 1300000), 2200000);
+
+	/* Prefetch Mode equals 1 */
+	KUNIT_EXPECT_EQ(test, CalculateTWait(1, 2500000, 2000000, 900000), 2000000);
+	KUNIT_EXPECT_EQ(test, CalculateTWait(1, 1300000, 900000, 1200000), 1200000);
+	KUNIT_EXPECT_EQ(test, CalculateTWait(1, 1100000, 1200000, 1000000), 1200000);
+	KUNIT_EXPECT_EQ(test, CalculateTWait(1, 1000000, 1200000, 1100000), 1200000);
+	KUNIT_EXPECT_EQ(test, CalculateTWait(1, 1000000, 900000, 2000000), 2000000);
+	KUNIT_EXPECT_EQ(test, CalculateTWait(1, 1000000, 1200000, 1300000), 1300000);
+
+	/* Prefetch Mode greater than 1 */
+	KUNIT_EXPECT_EQ(test, CalculateTWait(1, 2500000, 2000000, 900000), 2000000);
+	KUNIT_EXPECT_EQ(test, CalculateTWait(2, 2500000, 900000, 2000000), 900000);
+	KUNIT_EXPECT_EQ(test, CalculateTWait(5, 1100000, 1200000, 1000000), 1200000);
+	KUNIT_EXPECT_EQ(test, CalculateTWait(4, 1000000, 1300000, 1200000), 1300000);
+	KUNIT_EXPECT_EQ(test, CalculateTWait(6, 1000000, 900000, 2000000), 900000);
+	KUNIT_EXPECT_EQ(test, CalculateTWait(3, 1000000, 1200000, 1300000), 1200000);
+}
+
+static void trunc_to_valid_BPP_test(struct kunit *test)
+{
+	/* HDMI output for 4:2:0 encoding */
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(18.01, true, dm_hdmi, dm_420, 0), 18);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(18, true, dm_hdmi, dm_420, 10), 18);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(15.01, false, dm_hdmi, dm_420, 0), 15);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(15, false, dm_hdmi, dm_420, 8), 15);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(12.01, true, dm_hdmi, dm_420, 0), 12);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(12, true, dm_hdmi, dm_420, 5), 12);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(11.99, false, dm_hdmi, dm_420, 5), BPP_INVALID);
+
+	/* HDMI output for 4:2:0 encoding */
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(36.01, true, dm_hdmi, dm_444, 0), 36);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(36, true, dm_hdmi, dm_444, 10), 36);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(30.01, false, dm_hdmi, dm_444, 0), 30);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(30, false, dm_hdmi, dm_444, 8), 30);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(24.01, true, dm_hdmi, dm_444, 0), 24);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(24, true, dm_hdmi, dm_444, 5), 24);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(18.01, true, dm_hdmi, dm_444, 0), 18);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(18, true, dm_hdmi, dm_444, 5), 18);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(17.99, false, dm_hdmi, dm_444, 5), BPP_INVALID);
+
+	/* HDMI output for different encoding types */
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(36.01, true, dm_hdmi, dm_n422, 0), 24);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(36, true, dm_hdmi, dm_s422, 10), 24);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(30.01, false, dm_hdmi, dm_n422, 0), 20);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(30, false, dm_hdmi, dm_s422, 8), 20);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(24.01, true, dm_hdmi, dm_n422, 0), 16);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(24, true, dm_hdmi, dm_s422, 5), 16);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(15.99, false, dm_hdmi, dm_n422, 5), BPP_INVALID);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(-1, true, dm_hdmi, dm_s422, 0), BPP_INVALID);
+
+	/* Display Port output with DSC enabled and 4:2:0 encoding */
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(5.99, true, dm_dp, dm_420, 0), BPP_INVALID);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(-1, true, dm_dp, dm_420, 0), BPP_INVALID);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(12, true, dm_dp, dm_420, 8), 12);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(1.5 * 8 - 1 / (double)16, true, dm_dp, dm_420, 8), 11);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(7, true, dm_dp, dm_420, 3), 4);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(1.5 * 9 - 1 / (double)16, true, dm_dp, dm_420, 9), 13);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(6, true, dm_dp, dm_420, 8), 6);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(6.25, true, dm_dp, dm_420, 8), 6);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(6 + 1 / (double)3, true, dm_dp, dm_420, 8), 6);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(6.50, true, dm_dp, dm_420, 8), 6);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(6.75, true, dm_dp, dm_420, 8), 6);
+
+	/* Embedded Display Port output with DSC enabled and n-4:2:2 encoding */
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(6.99, true, dm_edp, dm_n422, 0), BPP_INVALID);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(-1, true, dm_edp, dm_n422, 0), BPP_INVALID);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(16, true, dm_edp, dm_n422, 7), 14);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(2 * 7 - 1 / (double)16, true, dm_edp, dm_n422, 7), 13);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(7, true, dm_edp, dm_n422, 3), 6);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(2 * 9 - 1 / (double)16, true, dm_edp, dm_n422, 9), 17);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(11, true, dm_edp, dm_n422, 8), 11);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(11 + 1 / (double)3, true, dm_edp, dm_n422, 8), 11);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(11.40, true, dm_edp, dm_n422, 8), 11);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(11.50, true, dm_edp, dm_n422, 8), 11);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(11.75, true, dm_edp, dm_n422, 8), 11);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(11.95, true, dm_edp, dm_n422, 8), 11);
+
+	/* Display Port 2.0 output with DSC enabled and 4:4:4 encoding */
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(7.99, true, dm_dp2p0, dm_444, 0), BPP_INVALID);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(-1, true, dm_dp2p0, dm_444, 0), BPP_INVALID);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(22, true, dm_dp2p0, dm_444, 11), 22);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(3 * 7 - 1 / (double)16, true, dm_dp2p0, dm_444, 7), 20);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(14, true, dm_dp2p0, dm_444, 3), 9);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(3 * 9 - 1 / (double)16, true, dm_dp2p0, dm_444, 9), 26);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(17, true, dm_dp2p0, dm_444, 7), 17);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(17 + 1 / (double)3, true, dm_dp2p0, dm_444, 7), 17);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(17.40, true, dm_dp2p0, dm_444, 7), 17);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(17.50, true, dm_dp2p0, dm_444, 7), 17);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(17.75, true, dm_dp2p0, dm_444, 7), 17);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(17.95, true, dm_dp2p0, dm_444, 7), 17);
+
+	/* WB output with DSC enabled and 4:2:2 s-encoding */
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(7.99, true, dm_wb, dm_s422, 0), BPP_INVALID);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(-1, true, dm_wb, dm_s422, 0), BPP_INVALID);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(22, true, dm_wb, dm_s422, 11), 22);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(3 * 7 - 1 / (double)16, true, dm_wb, dm_s422, 7), 20);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(18, true, dm_wb, dm_s422, 3), 9);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(3 * 9 - 1 / (double)16, true, dm_wb, dm_s422, 9), 26);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(17, true, dm_wb, dm_s422, 7), 17);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(17 + 1 / (double)3, true, dm_wb, dm_s422, 7), 17);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(17.40, true, dm_wb, dm_s422, 7), 17);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(17.50, true, dm_wb, dm_s422, 7), 17);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(17.75, true, dm_wb, dm_s422, 7), 17);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(17.95, true, dm_wb, dm_s422, 7), 17);
+
+	/* Display Port output with DSC disabled for 4:2:0 encoding */
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(18.01, false, dm_dp, dm_420, 0), 18);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(18, false, dm_dp, dm_420, 10), 18);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(15.01, false, dm_dp, dm_420, 0), 15);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(15, false, dm_dp, dm_420, 8), 15);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(12.01, false, dm_dp, dm_420, 0), 12);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(12, false, dm_dp, dm_420, 5), 12);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(11.99, false, dm_dp, dm_420, 5), BPP_INVALID);
+
+	/* Embedded Display Port output with DSC disabled for 4:2:2 encoding */
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(24.01, false, dm_edp, dm_s422, 0), 24);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(24, false, dm_edp, dm_n422, 10), 24);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(20.01, false, dm_edp, dm_s422, 0), 20);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(20, false, dm_edp, dm_n422, 8), 20);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(16.01, false, dm_edp, dm_s422, 0), 16);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(16, false, dm_edp, dm_n422, 5), 16);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(15.99, false, dm_edp, dm_s422, 5), BPP_INVALID);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(-1, false, dm_edp, dm_n422, 5), BPP_INVALID);
+
+	/* WB output with DSC disabled for 4:4:4 encoding */
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(36.01, false, dm_wb, dm_444, 0), 36);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(36, false, dm_wb, dm_444, 10), 36);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(30.01, false, dm_wb, dm_444, 0), 30);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(30, false, dm_wb, dm_444, 8), 30);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(24.01, false, dm_wb, dm_444, 0), 24);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(24, false, dm_wb, dm_444, 5), 24);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(18.01, false, dm_wb, dm_444, 0), 18);
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(18, false, dm_wb, dm_444, 5), 18);
+
+	KUNIT_EXPECT_EQ(test, TruncToValidBPP(17.99, false, dm_wb, dm_444, 5), BPP_INVALID);
+}
+
+static struct kunit_case display_mode_vba_20_cases[] = {
+	KUNIT_CASE(DSC_compute_delay_test),
+	KUNIT_CASE(calculate_TWait_test),
+	KUNIT_CASE(trunc_to_valid_BPP_test),
+	{  }
+};
+
+static struct kunit_suite display_mode_vba_20_suite = {
+	.name = "display_mode_vba_20",
+	.test_cases = display_mode_vba_20_cases,
+};
+
+kunit_test_suite(display_mode_vba_20_suite);
-- 
2.37.0


  parent reply	other threads:[~2022-08-11  0:41 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-11  0:40 [PATCH 0/8] drm/amd/display: Introduce KUnit to Display Mode Library Tales Aparecida
2022-08-11  0:40 ` [PATCH 1/8] drm/amd/display: Introduce KUnit tests for fixed31_32 library Tales Aparecida
2022-08-11  3:04   ` Daniel Latypov
2022-08-11  7:19     ` David Gow
2022-08-11 13:22       ` Maíra Canal
2022-08-13  5:56   ` David Gow
2022-08-11  0:40 ` [PATCH 2/8] drm/amd/display: Introduce KUnit tests to the bw_fixed library Tales Aparecida
2022-08-11  7:34   ` David Gow
2022-08-11 20:55     ` Tales Lelo da Aparecida
2022-08-11  0:40 ` [PATCH 3/8] drm/amd/display: Introduce Kunit tests to display_rq_dlg_calc_20 Tales Aparecida
2022-08-11  0:40 ` [PATCH 4/8] drm/amd/display: Introduce KUnit tests to the display_mode_vba library Tales Aparecida
2022-08-11  0:40 ` Tales Aparecida [this message]
2022-08-11  0:40 ` [PATCH 6/8] drm/amd/display: Introduce KUnit tests for dcn20_fpu Tales Aparecida
2022-08-11  0:40 ` [PATCH 7/8] drm/amd/display: Introduce KUnit tests to dc_dmub_srv library Tales Aparecida
2022-08-11  7:37   ` David Gow
2022-08-11 13:38     ` Maíra Canal
2022-08-11 17:53       ` David Gow
2022-08-11  0:40 ` [PATCH 8/8] Documentation/gpu: Add Display Core Unit Test documentation Tales Aparecida
2022-08-11 11:22 ` [PATCH 0/8] drm/amd/display: Introduce KUnit to Display Mode Library Christian König
2022-08-11 13:09   ` Maíra Canal
2022-08-12  6:58   ` David Gow

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