tests: Add lib/edid-test test case

Signed-off-by: Jakub Czapiga <jacz@semihalf.com>
Change-Id: I796e660eebc4d2c3c32207bd3a6ee44aaffeb325
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46817
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>

4 files changed, 1481 insertions, 0 deletions

diff --git a/tests/include/lib/edid-test.h b/tests/include/lib/edid-test.h
new file mode 100644
index 0000000000..073905d5f0
--- /dev/null
+++ b/tests/include/lib/edid-test.h
@@ -0,0 +1,196 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <stdlib.h>
+#include <commonlib/bsd/helpers.h>
+
+
+struct edid_raw {
+	uint8_t header[8];
+
+	/* Display product identification */
+	uint16_t manufacturer_id;
+	uint16_t product_code;
+	uint32_t serial_number;
+	uint8_t manufacture_week;
+	uint8_t manufacture_year;
+
+	/* EDID version information */
+	uint8_t edid_version;
+	uint8_t edid_revision;
+
+	/* Basic display parameters */
+	uint8_t video_input_type;
+	uint8_t horizontal_size; /* [cm] */
+	uint8_t vertical_size; /* [cm] */
+	uint8_t display_gamma;
+	uint8_t supported_features;
+
+	/* Color space definition */
+	uint8_t color_characteristics[10];
+
+	/* Timing information */
+	uint8_t established_supported_timings[2];
+	uint8_t manufacturers_reserved_timing;
+	uint8_t standard_timings_supported[16];
+	uint8_t descriptor_block_1[18];
+	uint8_t descriptor_block_2[18];
+	uint8_t descriptor_block_3[18];
+	uint8_t descriptor_block_4[18];
+
+	/* Number of optional 128-byte extension blocks */
+	uint8_t extension_flag;
+
+	uint8_t checksum;
+} __packed;
+
+_Static_assert(sizeof(struct edid_raw) == 128);
+
+#define EDID_HEADER_RAW		{ 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00 }
+#define EDID_HEADER_INVALID_RAW	{ 0, 0, 0, 0, 0, 0, 0, 0 }
+
+#define EDID_MANUFACTURER_ID		0xcb55
+#define EDID_MANUFACTURER_NAME		"UNK"
+#define EDID_PRODUCT_CODE		0x1234
+#define EDID_SERIAL_NUMBER		0x56789ABC
+#define EDID_MANUFACTURE_WEEK		23u
+#define EDID_MANUFACTURE_NO_WEEK	0u
+#define EDID_MANUFACTURE_YEAR		(2015u - 1990u)
+
+/* Video Input Definition for Analog Video Signal Interface */
+#define EDID_ANALOG_VSI			(0u << 7)
+#define EDID_SIGNAL_LEVEL_0		0u
+#define EDID_SIGNAL_LEVEL_1		(1u << 5)
+#define EDID_SIGNAL_LEVEL_2		(2u << 5)
+#define EDID_SIGNAL_LEVEL_3		(3u << 5)
+#define EDID_VIDEO_SETUP_BLANK_EQ_BLACK 0u
+#define EDID_VIDEO_SETUP_BLANK_TO_BLACK (1u << 4)
+#define EDID_SEPARATE_SYNC_H_AND_V(v)	((v != 0 ? 0x1 : 0x0) << 3)
+#define EDID_COMPOSITE_SYNC_H(v)	((v != 0 ? 0x1 : 0x0) << 2)
+#define EDID_COMPOSITE_SYNC_ON_GREEN(v)	((v != 0 ? 0x1 : 0x0) << 1)
+#define EDID_SERRATION_VSYNC(v)		(v != 0 ? 0x1 : 0x0)
+
+/* Video Input Definition for Digital Video Signal Interface */
+#define EDID_DIGITAL_VSI		(1u << 7)
+#define EDID_COLOR_BIT_DEPTH_UNDEFINED	0u
+#define EDID_COLOR_BIT_DEPTH_6B		(1u << 4)
+#define EDID_COLOR_BIT_DEPTH_8B		(2u << 4)
+#define EDID_COLOR_BIT_DEPTH_10B	(3u << 4)
+#define EDID_COLOR_BIT_DEPTH_12B	(4u << 4)
+#define EDID_COLOR_BIT_DEPTH_14B	(5u << 4)
+#define EDID_COLOR_BIT_DEPTH_16B	(6u << 4)
+#define EDID_INTERFACE_UNDEFINED	0u
+#define EDID_INTERFACE_DVI		1u
+#define EDID_INTERFACE_HDMI_A		2u
+#define EDID_INTERFACE_HDMI_B		3u
+#define EDID_INTERFACE_MDDI		4u
+#define EDID_INTERFACE_DP		5u
+
+/* BEGIN Supported features */
+#define EDID_STANDBY_MODE(v)				((v != 0 ? 0x1 : 0x0) << 7)
+#define EDID_SUSPEND_MODE(v)				((v != 0 ? 0x1 : 0x0) << 6)
+#define EDID_ACTIVE_OFF(v)				((v != 0 ? 0x1 : 0x0) << 5)
+/* For analog interface */
+#define EDID_COLOR_TYPE_MONO				0u
+#define EDID_COLOR_TYPE_RGB				(1u << 3)
+#define EDID_COLOR_TYPE_NON_RGB				(2u << 3)
+#define EDID_COLOR_TYPE_UNDEFINED			(3u << 3)
+/* For digital interface */
+#define EDID_COLOR_FORMAT_RGB444			0u
+#define EDID_COLOR_FORMAT_RGB444_YCRCB444		(1u << 3)
+#define EDID_COLOR_FORMAT_RGB444_YCRCB422		(2u << 3)
+#define EDID_COLOR_FORMAT_RGB444_YCRCB422_YCRCB422	(3u << 3)
+
+#define EDID_SRGB_SUPPORTED(v)				(((v) == 0 ? 0u : 1u) << 2)
+#define EDID_PREFERRED_TIMING_EXTENDED_INFO		(1u << 1)
+#define EDID_PREFERRED_TIMING_NO_EXTENDED_INFO		0u
+#define EDID_DISPLAY_FREQUENCY_CONTINUOUS		1u
+#define EDID_DISPLAY_FREQUENCY_NON_CONTINUOUS		0u
+/* END Supported features */
+
+/* Red X 0.640 */
+#define EDID_COLOR_R_X	0x25
+/* Red Y 0.330 */
+#define EDID_COLOR_R_Y	0x152
+/* Green X 0.300 */
+#define EDID_COLOR_G_X	0x13a
+/* Green Y 0.600 */
+#define EDID_COLOR_G_Y	0x267
+/* Blue X 0.150 */
+#define EDID_COLOR_B_X	0x9a
+/* Blue Y 0.060 */
+#define EDID_COLOR_B_Y	0x3e
+/* White X 0.3125 */
+#define EDID_COLOR_W_X	0xa
+/* White Y 0.3291 */
+#define EDID_COLOR_W_Y	0x22a
+
+/* 1 and 0 bits of each color */
+#define EDID_COLOR_R_X10_Y10	(((EDID_COLOR_R_X & 0x3) << 2) | (EDID_COLOR_R_Y & 0x3))
+#define EDID_COLOR_G_X10_Y10	(((EDID_COLOR_G_X & 0x3) << 2) | (EDID_COLOR_G_Y & 0x3))
+#define EDID_COLOR_B_X10_Y10	(((EDID_COLOR_B_X & 0x3) << 2) | (EDID_COLOR_B_Y & 0x3))
+#define EDID_COLOR_W_X10_Y10	(((EDID_COLOR_W_X & 0x3) << 2) | (EDID_COLOR_W_Y & 0x3))
+
+/* Concatenated 0 and 1 bits of each color. To be put
+ * as first and second byte of color characteristic. */
+#define EDID_COLOR_RG_XY	((EDID_COLOR_R_X10_Y10 << 4) | EDID_COLOR_G_X10_Y10)
+#define EDID_COLOR_BW_XY	((EDID_COLOR_B_X10_Y10 << 4) | EDID_COLOR_W_X10_Y10)
+
+/* Bits 9 through 2 of each color */
+#define EDID_COLOR_R_X92	(EDID_COLOR_R_X >> 2)
+#define EDID_COLOR_R_Y92	(EDID_COLOR_R_Y >> 2)
+#define EDID_COLOR_G_X92	(EDID_COLOR_G_X >> 2)
+#define EDID_COLOR_G_Y92	(EDID_COLOR_G_Y >> 2)
+#define EDID_COLOR_B_X92	(EDID_COLOR_B_X >> 2)
+#define EDID_COLOR_B_Y92	(EDID_COLOR_B_Y >> 2)
+#define EDID_COLOR_W_X92	(EDID_COLOR_W_X >> 2)
+#define EDID_COLOR_W_Y92	(EDID_COLOR_W_Y >> 2)
+
+#define EDID_ESTABLISHED_TIMINGS_1_800x600_60Hz		1u
+#define EDID_ESTABLISHED_TIMINGS_1_800x600_56Hz		(1u << 1)
+#define EDID_ESTABLISHED_TIMINGS_1_640x480_75Hz		(1u << 2)
+#define EDID_ESTABLISHED_TIMINGS_1_640x480_72Hz		(1u << 3)
+#define EDID_ESTABLISHED_TIMINGS_1_640x480_67Hz		(1u << 4)
+#define EDID_ESTABLISHED_TIMINGS_1_640x480_60Hz		(1u << 5)
+#define EDID_ESTABLISHED_TIMINGS_1_720x400_88Hz		(1u << 6)
+#define EDID_ESTABLISHED_TIMINGS_1_720x400_70Hz		(1u << 7)
+
+#define EDID_ESTABLISHED_TIMINGS_2_1280x1024_75Hz	1u
+#define EDID_ESTABLISHED_TIMINGS_2_1024x768_75Hz	(1u << 1)
+#define EDID_ESTABLISHED_TIMINGS_2_1024x768_70Hz	(1u << 2)
+#define EDID_ESTABLISHED_TIMINGS_2_1024x768_60Hz	(1u << 3)
+#define EDID_ESTABLISHED_TIMINGS_2_1024x768_80HzI	(1u << 4)
+#define EDID_ESTABLISHED_TIMINGS_2_832x624_75Hz		(1u << 5)
+#define EDID_ESTABLISHED_TIMINGS_2_800x600_75Hz		(1u << 6)
+#define EDID_ESTABLISHED_TIMINGS_2_800x600_72Hz		(1u << 7)
+
+#define EDID_MANUFACTURERS_TIMINGS_1152x870_75Hz	(1u << 7)
+
+#define EDID_HORIZONTAL_ACCESSIBLE_PIXELS(px)	(((px) / 8 - 31) & 0xFF)
+#define EDID_ASPECT_RATIO_16_10			0u
+#define EDID_ASPECT_RATIO_4_3			(1u << 6)
+#define EDID_ASPECT_RATIO_5_4			(2u << 6)
+#define EDID_ASPECT_RATIO_16_9			(3u << 6)
+#define EDID_FIELD_REFRESH_RATE(hz)		(((hz) - 60) & 0x1f)
+
+#define EDID_PIXEL_CLOCK(v)			(((v) / 10000) & 0xFFFF)
+
+#define EDID_RAW_DEFAULT_PARAMS .header = EDID_HEADER_RAW, \
+				.edid_version = 1, \
+				.edid_revision = 4, \
+				.manufacturer_id = EDID_MANUFACTURER_ID, \
+				.product_code = EDID_PRODUCT_CODE, \
+				.serial_number = EDID_SERIAL_NUMBER, \
+				.manufacture_week = EDID_MANUFACTURE_NO_WEEK, \
+				.manufacture_year = EDID_MANUFACTURE_YEAR, \
+				.color_characteristics = { \
+					EDID_COLOR_RG_XY, \
+					EDID_COLOR_BW_XY, \
+					EDID_COLOR_R_X92, \
+					EDID_COLOR_R_Y92, \
+					EDID_COLOR_G_X92, \
+					EDID_COLOR_G_Y92, \
+					EDID_COLOR_B_X92, \
+					EDID_COLOR_B_Y92, \
+					EDID_COLOR_W_X92, \
+					EDID_COLOR_W_Y92, \
+				}
diff --git a/tests/lib/Makefile.inc b/tests/lib/Makefile.inc
index 27773b7f39..219f7e7634 100644
--- a/tests/lib/Makefile.inc
+++ b/tests/lib/Makefile.inc
@@ -5,6 +5,7 @@ tests-y += b64_decode-test
 tests-y += hexstrtobin-test
 tests-y += imd-test
 tests-y += timestamp-test
+tests-y += edid-test
 
 string-test-srcs += tests/lib/string-test.c
 string-test-srcs += src/lib/string.c
@@ -24,3 +25,8 @@ timestamp-test-srcs += tests/lib/timestamp-test.c
 timestamp-test-srcs += tests/stubs/timestamp.c
 timestamp-test-srcs += tests/stubs/console.c
 timestamp-test-stage := romstage
+
+edid-test-srcs += tests/lib/edid-test.c
+edid-test-srcs += src/lib/edid.c
+edid-test-srcs += tests/stubs/console.c
+
diff --git a/tests/lib/edid-test.c b/tests/lib/edid-test.c
new file mode 100644
index 0000000000..0da7c61853
--- /dev/null
+++ b/tests/lib/edid-test.c
@@ -0,0 +1,1272 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <stdlib.h>
+#include <tests/test.h>
+#include <edid.h>
+#include <assert.h>
+#include <string.h>
+#include <lib/edid-test.h>
+
+struct test_state {
+	int data_size;
+	void *data;
+};
+
+static uint8_t get_raw_edid_checksum(const unsigned char *x)
+{
+	unsigned char sum = 0;
+	int i;
+	for (i = 0; i < 127; ++i)
+		sum += x[i];
+
+	return 256 - sum;
+}
+
+static void edid_raw_calc_checksum(struct edid_raw *raw)
+{
+	raw->checksum = get_raw_edid_checksum((const unsigned char *)raw);
+}
+
+static void test_decode_edid_no_edid(void **state)
+{
+	assert_int_equal(EDID_ABSENT, decode_edid(NULL, 0, NULL));
+}
+
+static void test_decode_edid_invalid_header(void **state)
+{
+	struct edid_raw raw = {
+		.header = EDID_HEADER_INVALID_RAW
+	};
+	raw.checksum = get_raw_edid_checksum((const unsigned char *)&raw);
+
+	assert_int_equal(EDID_ABSENT, decode_edid((unsigned char *)&raw, sizeof(raw), NULL));
+}
+
+/* Frame is modified example of an LCD Desktop IT display
+ * from VESA E-EDID Standard Release A2.
+ */
+static int setup_decode_edid_basic_frame(void **state)
+{
+	struct edid_raw raw = {
+		EDID_RAW_DEFAULT_PARAMS,
+		.video_input_type = EDID_ANALOG_VSI
+			| EDID_SIGNAL_LEVEL_0
+			| EDID_VIDEO_SETUP_BLANK_EQ_BLACK
+			| EDID_SEPARATE_SYNC_H_AND_V(1)
+			| EDID_COMPOSITE_SYNC_H(1)
+			| EDID_COMPOSITE_SYNC_ON_GREEN(1)
+			| EDID_SERRATION_VSYNC(1),
+		.horizontal_size = 43, /* [cm] */
+		.vertical_size = 32, /* [cm] */
+		.display_gamma = 120, /* 220% */
+		.supported_features = EDID_STANDBY_MODE(0)
+			| EDID_SUSPEND_MODE(0)
+			| EDID_ACTIVE_OFF(1)
+			| EDID_COLOR_FORMAT_RGB444
+			| EDID_SRGB_SUPPORTED(0)
+			| EDID_PREFERRED_TIMING_EXTENDED_INFO
+			| EDID_DISPLAY_FREQUENCY_CONTINUOUS,
+		.established_supported_timings = {
+			[0] = EDID_ESTABLISHED_TIMINGS_1_720x400_70Hz
+				| EDID_ESTABLISHED_TIMINGS_1_720x400_88Hz
+				| EDID_ESTABLISHED_TIMINGS_1_640x480_60Hz
+				| EDID_ESTABLISHED_TIMINGS_1_640x480_67Hz
+				| EDID_ESTABLISHED_TIMINGS_1_640x480_72Hz
+				| EDID_ESTABLISHED_TIMINGS_1_640x480_75Hz
+				| EDID_ESTABLISHED_TIMINGS_1_800x600_56Hz
+				| EDID_ESTABLISHED_TIMINGS_1_800x600_60Hz,
+			[1] = EDID_ESTABLISHED_TIMINGS_2_800x600_72Hz
+				| EDID_ESTABLISHED_TIMINGS_2_800x600_75Hz
+				| EDID_ESTABLISHED_TIMINGS_2_832x624_75Hz
+				| EDID_ESTABLISHED_TIMINGS_2_1024x768_80HzI
+				| EDID_ESTABLISHED_TIMINGS_2_1024x768_60Hz
+				| EDID_ESTABLISHED_TIMINGS_2_1024x768_70Hz
+				| EDID_ESTABLISHED_TIMINGS_2_1024x768_75Hz
+				| EDID_ESTABLISHED_TIMINGS_2_1280x1024_75Hz,
+		},
+		.manufacturers_reserved_timing = EDID_MANUFACTURERS_TIMINGS_1152x870_75Hz,
+		.standard_timings_supported = {
+			[0] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(1600),
+			[1] = EDID_ASPECT_RATIO_4_3 | EDID_FIELD_REFRESH_RATE(85),
+
+			[2] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(1600),
+			[3] = EDID_ASPECT_RATIO_4_3 | EDID_FIELD_REFRESH_RATE(75),
+
+			[4] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(1600),
+			[5] = EDID_ASPECT_RATIO_4_3 | EDID_FIELD_REFRESH_RATE(70),
+
+			[6] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(1600),
+			[7] = EDID_ASPECT_RATIO_4_3 | EDID_FIELD_REFRESH_RATE(65),
+
+			[8] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(1280),
+			[9] = EDID_ASPECT_RATIO_5_4 | EDID_FIELD_REFRESH_RATE(85),
+
+			[10] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(1280),
+			[11] = EDID_ASPECT_RATIO_5_4 | EDID_FIELD_REFRESH_RATE(60),
+
+			[12] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(1024),
+			[13] = EDID_ASPECT_RATIO_4_3 | EDID_FIELD_REFRESH_RATE(85),
+
+			[14] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(800),
+			[15] = EDID_ASPECT_RATIO_4_3 | EDID_FIELD_REFRESH_RATE(85),
+		},
+		.descriptor_block_1 = {
+			[0] = EDID_PIXEL_CLOCK(162000000u) & 0xFF,
+			[1] = (EDID_PIXEL_CLOCK(162000000u) >> 8) & 0xFF,
+
+			/*
+			 * Horizontal Addressable Video is 1600px
+			 * Horizontal Blanking is 560px
+			 */
+			[2] = 0x40, [3] = 0x30, [4] = 0x62,
+
+			/*
+			 * Vertical Addressable Video is 1200 lines
+			 * Vertical Blanking is 50 lines
+			 */
+			[5] = 0xB0, [6] = 0x32, [7] = 0x40,
+
+			[8] = 64u, /* Horizontal Front Porch in pixels */
+			[9] = 192u, /* Horizontal Pulse Sync Width in pixels */
+			[10] = 0x13, /* Vertical Front Porch is 1 line */
+			[11] = 0x00, /* Vertical Sync Pulse Width is 3 lines */
+
+			/*
+			 * Horizontal Addressable Image Size is 427mm
+			 * Vertical Addressable Image Size is 320mm
+			 */
+			[12] = 0xAB, [13] = 0x40, [14] = 0x11,
+
+			[15] = 0x00, /* Horizontal border size is 0px*/
+			[16] = 0x00, /* Vertical Border Size is 0px */
+
+			/*
+			 * Timing is Non-Interlaced Video,
+			 * Stereo Video is not supported,
+			 * Digital separate syncs are requires.
+			 * */
+			[17] = 0x1E,
+		},
+		.descriptor_block_2 = {
+			/* Display Range Limits Block Tag */
+			[0] = 0, [1] = 0, [2] = 0, [3] = 0xFD,
+
+			[4] = 0, /* Horizontal and Vertical Rate Offsets are zero */
+			[5] = 50u, /* Minimum Vertical Freq is 50Hz */
+			[6] = 90u, /* Maximum Vertical Freq is 90Hz */
+
+			[7] = 30u, /* Minimum Horizontal Freq is 30kHz */
+			[8] = 110u, /* Maximum Horizontal Freq is 110kHz */
+			[9] = 23u, /* Maximum Pixel Clock Freq i 230MHz */
+			[10] = 0x4, /* Begin CVT Support Info */
+			[11] = 0x11, /* Compatible with CVT Version 1.1 */
+			[12] = 0, /* Maimum Pixel Clock Freq remains at 230MHz */
+			[13] = 200, /* Maximum Active Pixels per Pile is 1600 */
+			[14] = 0x90, /* Supported aspect ratios: 4:3, 5:4 */
+
+			/* Preferred Aspect Ratio is 4:3, Standard CVT Blanking is supported */
+			[15] = 0,
+			[16] = 0x50, /* H. & V. Stretch are supported and Shrinks are not */
+			[17] = 60u, /* Preferred Refresh Rate is 60Hz */
+		},
+		.descriptor_block_3 = {
+			/* Established Timings III Block Tag */
+			[0] = 0, [1] = 0, [2] = 0, [3] = 0xF7, [4] = 0,
+
+			[5] = 10u, /* VESA DMT Standard Version #10 */
+			/*
+			 * 640x350@85Hz,
+			 * 640x400@85Hz,
+			 * 720x400@85Hz,
+			 * 640x480@85Hz,
+			 * 800x600@85Hz,
+			 * 1024x768@85Hz,
+			 * 1152x864@75Hz
+			 */
+			[6] = 0x7F,
+
+			/*
+			 * 1280x960@60Hz,
+			 * 1280x960@85Hz,
+			 * 1280x1024@60Hz,
+			 * 1280x1024@85Hz
+			 */
+			[7] = 0x0F,
+
+			/*
+			 * 1400x1050@60Hz (Normal Blanking),
+			 * 1400x1050@75Hz are supported.
+			 */
+			[8] = 0x03,
+
+			/*
+			 * 1400x1050@85Hz,
+			 * 1600x1200@60Hz,
+			 * 1600x1200@65Hz,
+			 * 1600x1200@70Hz are supported.
+			 */
+			[9] = 0x87,
+
+			/*
+			 * 1600x1200@75Hz,
+			 * 1600x1200@85Hz are supported.
+			 */
+			[10] = 0xC0,
+
+			/* 1920 timings not supported */
+			[11] = 0x0,
+
+			[12 ... 17] = 0,
+		},
+		.descriptor_block_4 = {
+			/* Display Product Name Block Tag */
+			[0] = 0, [1] = 0, [2] = 0, [3] = 0xFC, [4] = 0,
+
+			/* Product name */
+			[5] = 'A',
+			[6] = 'B',
+			[7] = 'C',
+			[8] = ' ',
+			[9] = 'L',
+			[10] = 'C',
+			[11] = 'D',
+			[12] = '2',
+			[13] = '1',
+			[14] = '\n',
+			[15] = ' ',
+			[16] = ' ',
+			[17] = ' ',
+		},
+		.extension_flag = 0x0, /* No extensions */
+	};
+
+	edid_raw_calc_checksum(&raw);
+
+	*state = malloc(sizeof(struct test_state));
+
+	struct test_state ts = {
+		.data_size = sizeof(struct edid_raw),
+		.data = malloc(sizeof(struct edid_raw))
+	};
+
+	memcpy(ts.data, &raw, sizeof(raw));
+	memcpy(*state, &ts, sizeof(ts));
+
+	return 0;
+}
+
+/* Test decoding of EDID frame without extensions.
+ */
+static void test_decode_edid_basic_frame(void **state)
+{
+	struct edid out;
+	struct test_state *ts = *state;
+
+	/* In real-life situations frames often are not 100% conformant,
+	 * but are at least correct when it comes to key data fields.
+	 */
+	assert_int_equal(EDID_CONFORMANT,
+			decode_edid((unsigned char *)ts->data, ts->data_size, &out));
+
+	assert_int_equal(32, out.framebuffer_bits_per_pixel);
+	assert_int_equal(0, out.panel_bits_per_color);
+	assert_int_equal(0, out.panel_bits_per_pixel);
+	assert_int_equal(0, out.link_clock);
+	assert_int_equal(1600, out.x_resolution);
+	assert_int_equal(1200, out.y_resolution);
+	assert_int_equal(6400, out.bytes_per_line);
+	assert_int_equal(0, out.hdmi_monitor_detected);
+	assert_int_equal(0, strnlen(out.ascii_string, ARRAY_SIZE(out.ascii_string)));
+	assert_string_equal(out.manufacturer_name, EDID_MANUFACTURER_NAME);
+
+	/* Mode */
+	assert_null(out.mode.name);
+	assert_int_equal(162000, out.mode.pixel_clock);
+	assert_int_equal(1, out.mode.lvds_dual_channel);
+	assert_int_equal(0, out.mode.refresh);
+	assert_int_equal(1600, out.mode.ha);
+	assert_int_equal(560, out.mode.hbl);
+	assert_int_equal(64, out.mode.hso);
+	assert_int_equal(192, out.mode.hspw);
+	assert_int_equal(0, out.mode.hborder);
+	assert_int_equal(1200, out.mode.va);
+	assert_int_equal(50, out.mode.vbl);
+	assert_int_equal(1, out.mode.vso);
+	assert_int_equal(0, out.mode.vborder);
+	assert_int_equal(43, out.mode.phsync);
+	assert_int_equal(43, out.mode.pvsync);
+	assert_int_equal(0, out.mode.x_mm);
+	assert_int_equal(0, out.mode.y_mm);
+
+	assert_int_equal(1, out.mode_is_supported[EDID_MODE_640x480_60Hz]);
+	assert_int_equal(0, out.mode_is_supported[EDID_MODE_720x480_60Hz]);
+	assert_int_equal(0, out.mode_is_supported[EDID_MODE_1280x720_60Hz]);
+	assert_int_equal(0, out.mode_is_supported[EDID_MODE_1920x1080_60Hz]);
+}
+
+/* Frame is modified example of base EDID frame with CEA861 extension
+ * for DTV Display from VESA E-EDID Standard Release A2.
+ */
+static int setup_decode_edid_dtv_frame_with_extension(void **state)
+{
+	struct edid_raw raw = {
+		EDID_RAW_DEFAULT_PARAMS,
+		.video_input_type = EDID_DIGITAL_VSI
+			| EDID_INTERFACE_HDMI_A
+			| EDID_COLOR_BIT_DEPTH_8B,
+		.horizontal_size = 16, /* Aspect ratio 16:9 in landscape */
+		.vertical_size = 0, /* Landscape flag */
+		.display_gamma = 120, /* 220% */
+		.supported_features = EDID_STANDBY_MODE(0)
+			| EDID_SUSPEND_MODE(0)
+			| EDID_ACTIVE_OFF(0)
+			| EDID_COLOR_FORMAT_RGB444_YCRCB422_YCRCB422
+			| EDID_SRGB_SUPPORTED(1)
+			| EDID_PREFERRED_TIMING_EXTENDED_INFO
+			| EDID_DISPLAY_FREQUENCY_NON_CONTINUOUS,
+
+		.established_supported_timings = {
+			[0] = EDID_ESTABLISHED_TIMINGS_1_640x480_60Hz,
+			[1] = 0,
+		},
+		.manufacturers_reserved_timing = 0,
+		.standard_timings_supported = { [0 ... 15] = 0, },
+		.descriptor_block_1 = {
+			[0] = EDID_PIXEL_CLOCK(148500000u) & 0xFF,
+			[1] = (EDID_PIXEL_CLOCK(148500000u) >> 8) & 0xFF,
+
+			/* Horizontal Addressable Video is 1920px
+			 * Horizontal Blanking is 280px
+			 */
+			[2] = 0x80, [3] = 0x18, [4] = 0x71,
+
+			/* Vertical Addressable Video is 1080 lines
+			 * Vertical Blanking is 45 lines
+			 */
+			[5] = 0x38, [6] = 0x2D, [7] = 0x40,
+
+			[8] = 88u, /* Horizontal Front Porch in pixels */
+			[9] = 44u, /* Horizontal Pulse Sync Width in pixels */
+			[10] = 4u, /* Vertical Front Porch is 4 lines */
+			[11] = 5u, /* Vertical Sync Pulse Width is 5 lines */
+
+			/* Horizontal Addressable Image Size is 1039mm
+			 * Vertical Addressable Image Size is 584mm
+			 */
+			[12] = 0x0F, [13] = 0x48, [14] = 0x42,
+
+			[15] = 0x00, /* Horizontal border size is 0px*/
+			[16] = 0x00, /* Vertical Border Size is 0px */
+
+			/* Timing is Non-Interlaced Video,
+			 * Stereo Video is not supported,
+			 * Digital separate and syncs are requires.
+			 */
+			[17] = 0x1E,
+		},
+		.descriptor_block_2 = {
+			[0] = EDID_PIXEL_CLOCK(74250000u) & 0xFF,
+			[1] = (EDID_PIXEL_CLOCK(74250000u) >> 8) & 0xFF,
+
+			/* Horizontal Addressable Video is 1920px
+			 * Horizontal Blanking is 280px
+			 */
+			[2] = 0x80, [3] = 0x18, [4] = 0x71,
+
+			/* Vertical Addressable Video is 540 lines
+			 * Vertical Blanking is 22 lines
+			 */
+			[5] = 0x1C, [6] = 0x16, [7] = 0x20,
+
+			[8] = 88u, /* Horizontal Front Porch in pixels */
+			[9] = 44u, /* Horizontal Pulse Sync Width in pixels */
+			[10] = 0x25, /* Vertical Front Porch is 2 lines */
+			[11] = 0x00, /* Vertical Sync Pulse Width is 5 lines */
+
+			/* Horizontal Addressable Image Size is 1039mm
+			 * Vertical Addressable Image Size is 584mm
+			 */
+			[12] = 0x0F, [13] = 0x48, [14] = 0x42,
+
+			[15] = 0x00, /* Horizontal border size is 0px*/
+			[16] = 0x00, /* Vertical Border Size is 0px */
+
+			/* Timing is Interlaced Video,
+			 * Stereo Video is not supported,
+			 * Digital separate and syncs are requires.
+			 */
+			[17] = 0x9E,
+		},
+		.descriptor_block_3 = {
+			[0] = EDID_PIXEL_CLOCK(74250000u) & 0xFF,
+			[1] = (EDID_PIXEL_CLOCK(74250000u) >> 8) & 0xFF,
+
+			/* Horizontal Addressable Video is 1280px
+			 * Horizontal Blanking is 370px
+			 */
+			[2] = 0x00, [3] = 0x72, [4] = 0x51,
+
+			/* Vertical Addressable Video is 720 lines
+			 * Vertical Blanking is 30 lines
+			 */
+			[5] = 0xD0, [6] = 0x1E, [7] = 0x20,
+
+			[8] = 110u, /* Horizontal Front Porch in pixels */
+			[9] = 40u, /* Horizontal Pulse Sync Width in pixels */
+			[10] = 0x55u, /* Vertical Front Porch is 5 lines */
+			[11] = 0x00, /* Vertical Sync Pulse Width is 5 lines */
+
+			/* Horizontal Addressable Image Size is 1039mm
+			 * Vertical Addressable Image Size is 584mm
+			 */
+			[12] = 0x0F, [13] = 0x48, [14] = 0x42,
+
+			[15] = 0x00, /* Horizontal border size is 0px*/
+			[16] = 0x00, /* Vertical Border Size is 0px */
+
+			/* Timing is Non-Interlaced Video,
+			 * Stereo Video is not supported,
+			 * Digital separate syncs are requires.
+			 */
+			[17] = 0x1E,
+		},
+		.descriptor_block_4 = {
+			/* Display Product Name Block Tag */
+			[0] = 0, [1] = 0, [2] = 0, [3] = 0xFC, [4] = 0,
+
+			/* Product name */
+			[5] = 'A',
+			[6] = 'B',
+			[7] = 'C',
+			[8] = ' ',
+			[9] = 'L',
+			[10] = 'C',
+			[11] = 'D',
+			[12] = '4',
+			[13] = '7',
+			[14] = 'w',
+			[15] = '\n',
+			[16] = ' ',
+			[17] = ' ',
+		},
+		.extension_flag = 0x0, /* No extensions */
+	};
+
+	edid_raw_calc_checksum(&raw);
+
+	unsigned char ext[128] = {
+		[0] = 0x02, /* CEA 861 Extension Block Tag Code */
+		[1] = 0x03, /* CEA 861 Block Version */
+
+		[2] = 0x18, /* Detail Timing Descriptors start 0x18 bytes from here */
+
+		/* Underscan is not supported
+		 * Basic Audio is supported
+		 * YCbCr 4:4:4 & YCbCr 4:2:2 are supported
+		 * Number of native formats: 2
+		 */
+		[3] = 0x72,
+
+		/* Video Data Block Tag Code is 2
+		 * Number of Short Video Descriptor Bytes i 7
+		 */
+		[4] = 0x47,
+
+		/* 1920x1080p 59.94/60 Hz 16 : 9 AR (CEA Format #16)
+		 * is a supported Native Format. */
+		[5] = 0x90,
+
+		/* 1920x1080i 59.94/60 Hz 16 : 9 AR (CEA Format #5)
+		 * is a supported Native Format. */
+		[6] = 0x85,
+
+		/* 1280x720p 59.94/60 Hz 16 : 9 AR (CEA Format #4) is a supported format. */
+		[7] = 0x04,
+
+		/* 720x480p 59.94/60 Hz 16 : 9 AR (CEA Format #3) is a supported format. */
+		[8] = 0x03,
+
+		/* 720x480p 59.94/60 Hz 4 : 3 AR (CEA Format #2) is a supported format. */
+		[9] = 0x02,
+
+		/* 720x480i 59.94/60 Hz 16 : 9 AR (CEA Format #7) is a supported format. */
+		[10] = 0x07,
+
+		/* 720x480i 59.94/60 Hz 4 : 3 AR (CEA Format #6) is a supported format. */
+		[11] = 0x06,
+
+		/* Audio Data Block Tag Code is 1.
+		 * Number of Short Audio Descriptor Bytes is 3.
+		 */
+		[12] = 0x23,
+
+		/* Audio Format Tag Code is 1 --- LPCM is supported.
+		 * Maximum number of audio channels is 2
+		 */
+		[13] = 0x09,
+
+		/* Supported Sampling Frequencies include: 48kHz; 44.1kHz & 32kHz. */
+		[14] = 0x07,
+
+		/* Supported Sampling Bit Rates include: 24 bit; 20 bit & 16 bit. */
+		[15] = 0x07,
+
+		/* Speaker Allocation Block Tag Code is 4.
+		 * Number of Speaker Allocation
+		 * Descriptor Bytes is 3.
+		 */
+		[16] = 0x83,
+
+		/* Speaker Allocation is Front-Left & Front-Right */
+		[17] = 0x01,
+
+		/* Reserved */
+		[18 ... 19] = 0,
+
+		/* Vendor Specific Data Block Tag Code is 3.
+		 * Number of Vendor Specific Data Bytes is 5.
+		 */
+		[20] = 0x65,
+
+		/* 24bit IEEE registration Identifier is 0x000C03 */
+		[21] = 0x03, [22] = 0x0C, [23] = 0x00,
+
+		/* Vendor Specific Data is 0x10000 */
+		[24] = 0x01, [25] = 0x00,
+
+		/* Descriptor Block 5 [18 Bytes] */
+
+		[26] = EDID_PIXEL_CLOCK(27027000u) & 0xFF,
+		[27] = (EDID_PIXEL_CLOCK(27027000u) >> 8) & 0xFF,
+
+		/* Horizontal Addressable Video is 720px.
+		 * Horizontal Blanking is 138 px.
+		 */
+		[28] = 0xD0, [29] = 0x8A, [30] = 0x20,
+
+		/* Vertical Addressable Video is 480 lines.
+		 * Vertical Blanking is 45 lines.
+		 */
+		[31] = 0xE0, [32] = 0x2D, [33] = 0x10,
+
+		[34] = 16u, /* Horizontal Front Porch in pixels */
+		[35] = 62u, /* Horizontal Sync Pulse Width in pixels */
+		[36] = 0x96, /* Vertical Front Porch is 9 lines */
+		[37] = 0x00, /* Vertical Sync Pulse Width is 6 lines */
+
+		/* Displayed Image Aspect Ratio is 16:9 */
+		[38] = 16u, [39] = 9u, [40] = 0u,
+
+		/* Horizontal and Vertical Border Size is 0 px */
+		[41] = 0u, [42] = 0u,
+
+		/* Timing is Interlaced Video
+		 * Stereo Video is not supported
+		 * Digital Separate Syncs are required
+		 */
+		[43] = 0x18,
+
+		/* Descriptor Block 6 [18 Bytes] */
+
+		[44] = EDID_PIXEL_CLOCK(27027000u) & 0xFF,
+		[45] = (EDID_PIXEL_CLOCK(27027000u) >> 8) & 0xFF,
+
+		/* Horizontal Addressable Video is 720px.
+		 * Horizontal Blanking is 138 px.
+		 */
+		[46] = 0xD0, [47] = 0x8A, [48] = 0x20,
+
+		/* Vertical Addressable Video is 480 lines.
+		 * Vertical Blanking is 45 lines.
+		 */
+		[49] = 0xE0, [50] = 0x2D, [51] = 0x10,
+
+		[52] = 16u, /* Horizontal Front Porch in pixels */
+		[53] = 62u, /* Horizontal Sync Pulse Width in pixels */
+		[54] = 0x96, /* Vertical Front Porch is 9 lines */
+		[55] = 0x00, /* Vertical Sync Pulse Width is 6 lines */
+
+		/* Displayed Image Aspect Ratio is 4:3 */
+		[56] = 4u, [57] = 3u, [58] = 0u,
+
+		/* Horizontal and Vertical Border Size is 0 px */
+		[59] = 0u, [60] = 0u,
+
+		/* Timing is Interlaced Video
+		 * Stereo Video is not supported
+		 * Digital Separate Syncs are required
+		 */
+		[61] = 0x18,
+
+		/* Descriptor Block 7 [18 Bytes] */
+
+		[62] = EDID_PIXEL_CLOCK(27027000u) & 0xFF,
+		[63] = (EDID_PIXEL_CLOCK(27027000u) >> 8) & 0xFF,
+
+		/* Horizontal Addressable Video is 1440px.
+		 * Horizontal Blanking is 276 px.
+		 */
+		[64] = 0xA0, [65] = 0x14, [66] = 0x51,
+
+		/* Vertical Addressable Video is 240 lines.
+		 * Vertical Blanking is 23 lines.
+		 */
+		[67] = 0xF0, [68] = 0x16, [69] = 0x00,
+
+		[70] = 38u, /* Horizontal Front Porch in pixels */
+		[71] = 124u, /* Horizontal Sync Pulse Width in pixels */
+		[72] = 0x43, /* Vertical Front Porch is 9 lines */
+		[73] = 0x00, /* Vertical Sync Pulse Width is 6 lines */
+
+		/* Displayed Image Aspect Ratio is 16:9 */
+		[74] = 16u, [75] = 9u, [76] = 0u,
+
+		/* Horizontal and Vertical Border Size is 0 px */
+		[77] = 0u, [78] = 0u,
+
+		/* Timing is Interlaced Video
+		 * Stereo Video is not supported
+		 * Digital Separate Syncs are required
+		 */
+		[79] = 0x98,
+
+		/* Descriptor Block 8 [18 Bytes] */
+
+		[80] = EDID_PIXEL_CLOCK(27027000u) & 0xFF,
+		[81] = (EDID_PIXEL_CLOCK(27027000u) >> 8) & 0xFF,
+
+		/* Horizontal Addressable Video is 1440px.
+		 * Horizontal Blanking is 276 px.
+		 */
+		[82] = 0xA0, [83] = 0x14, [84] = 0x51,
+
+		/* Vertical Addressable Video is 240 lines.
+		 * Vertical Blanking is 23 lines.
+		 */
+		[85] = 0xF0, [86] = 0x16, [87] = 0x00,
+
+		[88] = 38u, /* Horizontal Front Porch in pixels */
+		[89] = 124u, /* Horizontal Sync Pulse Width in pixels */
+		[90] = 0x43, /* Vertical Front Porch is 9 lines */
+		[91] = 0x00, /* Vertical Sync Pulse Width is 6 lines */
+
+		/* Displayed Image Aspect Ratio is 4:3 */
+		[92] = 4u, [93] = 3u, [94] = 0u,
+
+		/* Horizontal and Vertical Border Size is 0 px */
+		[95] = 0u, [96] = 0u,
+
+		/* Timing is Interlaced Video
+		 * Stereo Video is not supported
+		 * Digital Separate Syncs are required
+		 */
+		[97] = 0x98,
+
+		[99 ... 126] = 0
+	};
+
+	ext[127] = get_raw_edid_checksum(ext);
+
+	*state = malloc(sizeof(struct test_state));
+
+	struct test_state ts = {
+		.data_size = sizeof(raw) + sizeof(ext),
+		.data = malloc(sizeof(raw) + sizeof(ext))
+	};
+
+	memcpy(ts.data, &raw, sizeof(raw));
+	memcpy(ts.data + sizeof(raw), &ext[0], sizeof(ext));
+
+	memcpy(*state, &ts, sizeof(ts));
+
+	return 0;
+}
+
+/* Test decoding of EDID frame with one extension.
+ */
+static void test_decode_edid_dtv_frame_with_extension(void **state)
+{
+	struct edid out;
+	struct test_state *ts = *state;
+
+	/* In real-life situations frames often are not 100% conformant,
+	 * but are at least correct when it comes to key data fields.
+	 */
+	assert_int_equal(EDID_CONFORMANT,
+			decode_edid((unsigned char *)ts->data, ts->data_size, &out));
+
+	assert_int_equal(32, out.framebuffer_bits_per_pixel);
+	assert_int_equal(8, out.panel_bits_per_color);
+	assert_int_equal(24, out.panel_bits_per_pixel);
+	assert_int_equal(0, out.link_clock);
+	assert_int_equal(1920, out.x_resolution);
+	assert_int_equal(1080, out.y_resolution);
+	assert_int_equal(7680, out.bytes_per_line);
+	assert_int_equal(1, out.hdmi_monitor_detected);
+	assert_int_equal(0, strnlen(out.ascii_string, ARRAY_SIZE(out.ascii_string)));
+	assert_string_equal(out.manufacturer_name, EDID_MANUFACTURER_NAME);
+
+	/* Mode */
+	assert_null(out.mode.name);
+	assert_int_equal(148500, out.mode.pixel_clock);
+	assert_int_equal(1, out.mode.lvds_dual_channel);
+	assert_int_equal(0, out.mode.refresh);
+	assert_int_equal(1920, out.mode.ha);
+	assert_int_equal(280, out.mode.hbl);
+	assert_int_equal(88, out.mode.hso);
+	assert_int_equal(44, out.mode.hspw);
+	assert_int_equal(0, out.mode.hborder);
+	assert_int_equal(1080, out.mode.va);
+	assert_int_equal(45, out.mode.vbl);
+	assert_int_equal(16, out.mode.vso);
+	assert_int_equal(0, out.mode.vborder);
+	assert_int_equal(43, out.mode.phsync);
+	assert_int_equal(43, out.mode.pvsync);
+	assert_int_equal(0, out.mode.x_mm);
+	assert_int_equal(0, out.mode.y_mm);
+
+	assert_int_equal(1, out.mode_is_supported[EDID_MODE_640x480_60Hz]);
+	assert_int_equal(0, out.mode_is_supported[EDID_MODE_720x480_60Hz]);
+	assert_int_equal(0, out.mode_is_supported[EDID_MODE_1280x720_60Hz]);
+	assert_int_equal(0, out.mode_is_supported[EDID_MODE_1920x1080_60Hz]);
+}
+
+
+/* Test decoding of EDID frame with one extension. Tested frame is modified
+ * example of base EDID frame with CEA861 extension for IT/DTV Display from
+ * VESA E-EDID Standard Release A2.
+ */
+static int setup_decode_edid_it_dtv_frame_with_extension(void **state)
+{
+	struct edid_raw raw = {
+		EDID_RAW_DEFAULT_PARAMS,
+		.video_input_type = EDID_DIGITAL_VSI
+			| EDID_INTERFACE_HDMI_A
+			| EDID_COLOR_BIT_DEPTH_8B,
+		.horizontal_size = 121, /* Aspect ratio 16:9 in landscape */
+		.vertical_size = 68, /* Landscape flag */
+		.display_gamma = 120, /* 220% */
+		.supported_features = EDID_STANDBY_MODE(0)
+			| EDID_SUSPEND_MODE(0)
+			| EDID_ACTIVE_OFF(0)
+			| EDID_COLOR_FORMAT_RGB444_YCRCB422_YCRCB422
+			| EDID_SRGB_SUPPORTED(1)
+			| EDID_PREFERRED_TIMING_EXTENDED_INFO
+			| EDID_DISPLAY_FREQUENCY_NON_CONTINUOUS,
+		.established_supported_timings = {
+			[0] = EDID_ESTABLISHED_TIMINGS_1_800x600_60Hz
+				| EDID_ESTABLISHED_TIMINGS_1_800x600_56Hz
+				| EDID_ESTABLISHED_TIMINGS_1_640x480_75Hz
+				| EDID_ESTABLISHED_TIMINGS_1_640x480_72Hz
+				| EDID_ESTABLISHED_TIMINGS_1_640x480_67Hz
+				| EDID_ESTABLISHED_TIMINGS_1_640x480_60Hz
+				| EDID_ESTABLISHED_TIMINGS_1_720x400_88Hz
+				| EDID_ESTABLISHED_TIMINGS_1_720x400_70Hz,
+			[1] = EDID_ESTABLISHED_TIMINGS_2_1280x1024_75Hz
+				| EDID_ESTABLISHED_TIMINGS_2_1024x768_75Hz
+				| EDID_ESTABLISHED_TIMINGS_2_1024x768_70Hz
+				| EDID_ESTABLISHED_TIMINGS_2_1024x768_60Hz
+				| EDID_ESTABLISHED_TIMINGS_2_832x624_75Hz
+				| EDID_ESTABLISHED_TIMINGS_2_800x600_75Hz
+				| EDID_ESTABLISHED_TIMINGS_2_800x600_72Hz,
+		},
+		.manufacturers_reserved_timing = EDID_MANUFACTURERS_TIMINGS_1152x870_75Hz,
+		.standard_timings_supported = {
+			[0] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(1280),
+			[1] = EDID_ASPECT_RATIO_5_4 | EDID_FIELD_REFRESH_RATE(85),
+
+			[2] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(1280),
+			[3] = EDID_ASPECT_RATIO_5_4 | EDID_FIELD_REFRESH_RATE(60),
+
+			[4] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(1280),
+			[5] = EDID_ASPECT_RATIO_4_3 | EDID_FIELD_REFRESH_RATE(85),
+
+			[6] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(1280),
+			[7] = EDID_ASPECT_RATIO_4_3 | EDID_FIELD_REFRESH_RATE(60),
+
+			[8] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(1024),
+			[9] = EDID_ASPECT_RATIO_4_3 | EDID_FIELD_REFRESH_RATE(85),
+
+			[10] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(848),
+			[11] = EDID_ASPECT_RATIO_16_9 | EDID_FIELD_REFRESH_RATE(60),
+
+			[12] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(800),
+			[13] = EDID_ASPECT_RATIO_4_3 | EDID_FIELD_REFRESH_RATE(60),
+
+			[14] = EDID_HORIZONTAL_ACCESSIBLE_PIXELS(640),
+			[15] = EDID_ASPECT_RATIO_4_3 | EDID_FIELD_REFRESH_RATE(60),
+		},
+		.descriptor_block_1 = {
+			[0] = EDID_PIXEL_CLOCK(85500000u) & 0xFF,
+			[1] = (EDID_PIXEL_CLOCK(85500000u) >> 8) & 0xFF,
+
+			/* Horizontal Addressable Video is 1360px
+			 * Horizontal Blanking is 432px
+			 */
+			[2] = 0x50, [3] = 0xB0, [4] = 0x51,
+
+			/* Vertical Addressable Video is 768 lines
+			 * Vertical Blanking is 27 lines
+			 */
+			[5] = 0x00, [6] = 0x1B, [7] = 0x30,
+
+			[8] = 64u, /* Horizontal Front Porch in pixels */
+			[9] = 112u, /* Horizontal Pulse Sync Width in pixels */
+			[10] = 0x36, /* Vertical Front Porch is 3 lines */
+			[11] = 0u, /* Vertical Sync Pulse Width is 6 lines */
+
+			/* Horizontal Addressable Image Size is 1214mm
+			 * Vertical Addressable Image Size is 683mm
+			 */
+			[12] = 0xBE, [13] = 0xAB, [14] = 0x42,
+
+			[15] = 0x00, /* Horizontal border size is 0px*/
+			[16] = 0x00, /* Vertical Border Size is 0px */
+
+			/* Timing is Non-Interlaced Video,
+			 * Stereo Video is not supported,
+			 * Digital separate and syncs are requires.
+			 */
+			[17] = 0x1E,
+		},
+		.descriptor_block_2 = {
+			[0] = EDID_PIXEL_CLOCK(74250000u) & 0xFF,
+			[1] = (EDID_PIXEL_CLOCK(74250000u) >> 8) & 0xFF,
+
+			/* Horizontal Addressable Video is 1280px
+			 * Horizontal Blanking is 370px
+			 */
+			[2] = 0x00, [3] = 0x72, [4] = 0x51,
+
+			/* Vertical Addressable Video is 720 lines
+			 * Vertical Blanking is 30 lines
+			 */
+			[5] = 0xD0, [6] = 0x1E, [7] = 0x20,
+
+			[8] = 110u, /* Horizontal Front Porch in pixels */
+			[9] = 40u, /* Horizontal Pulse Sync Width in pixels */
+			[10] = 0x55, /* Vertical Front Porch is 5 lines */
+			[11] = 0x00, /* Vertical Sync Pulse Width is 5 lines */
+
+			/* Horizontal Addressable Image Size is 1214mm
+			 * Vertical Addressable Image Size is 683mm
+			 */
+			[12] = 0xBE, [13] = 0xAB, [14] = 0x42,
+
+			[15] = 0x00, /* Horizontal border size is 0px*/
+			[16] = 0x00, /* Vertical Border Size is 0px */
+
+			/* Timing is Non-Interlaced Video,
+			 * Stereo Video is not supported,
+			 * Digital separate and syncs are requires.
+			 */
+			[17] = 0x1E,
+		},
+		.descriptor_block_3 = {
+			/* Established timings III Block Tag */
+			[0 ... 2] = 0u, [3] = 0xF7, [4] = 0u,
+
+			/*
+			 * VESA DMT Standard Version #10
+			 */
+			[5] = 10u,
+
+			/* 640x350@85Hz,
+			 * 640x400@85Hz,
+			 * 720x400@85Hz,
+			 * 640x480@85Hz,
+			 * 800x600@85Hz,
+			 * 1024x768@85Hz,
+			 * 1152x864@75Hz are supported.
+			 */
+			[6] = 0x7F,
+
+			/* 1280x960@60Hz,
+			 * 1280x960@85Hz,
+			 * 1280x1024@60Hz,
+			 * 1280x1024@85Hz
+			 */
+			[7] = 0x0F,
+
+			/* 1400x1050@60Hz (Normal Blanking),
+			 * 1400x1050@75Hz are supported.
+			 */
+			[8] = 0x03,
+
+			/* 1400x1050@85Hz,
+			 * 1600x1200@60Hz,
+			 * 1600x1200@65Hz,
+			 * 1600x1200@70Hz are supported.
+			 */
+			[9] = 0x87,
+
+			/* 1600x1200@75Hz,
+			 * 1600x1200@85Hz are supported.
+			 */
+			[10] = 0xC0,
+
+			/* 1920 PC Timings are not supported. */
+			[11] = 0u,
+
+			/* Reserved */
+			[12 ... 17] = 0,
+		},
+		.descriptor_block_4 = {
+			/* Display Product Name Block Tag */
+			[0] = 0, [1] = 0, [2] = 0, [3] = 0xFC, [4] = 0,
+
+			/* Product name */
+			[5] = 'A',
+			[6] = 'B',
+			[7] = 'C',
+			[8] = ' ',
+			[9] = 'P',
+			[10] = 'L',
+			[11] = 'A',
+			[12] = '5',
+			[13] = '5',
+			[14] = '\n',
+			[15] = ' ',
+			[16] = ' ',
+			[17] = ' ',
+		},
+		.extension_flag = 0x0, /* No extensions */
+	};
+
+	edid_raw_calc_checksum(&raw);
+
+	unsigned char ext[128] = {
+		[0] = 0x02, /* CEA 861 Extension Block Tag Code */
+		[1] = 0x03, /* CEA 861 Block Version */
+		[2] = 0x17, /* Detail Timing Descriptors start 0x17 bytesfrom here */
+
+		/* Underscan is supported
+		 * Basic Audio is supported
+		 * YCbCr 4:4:4 & YCbCr 4:2:2 are supported
+		 * Number of native formats: 0
+		 */
+		[3] = 0xF0,
+
+		/* Video Data Block Tag Code is 2
+		 * Number of Short Video Descriptor Bytes i 6
+		 */
+		[4] = 0x46,
+
+		/* 1920x1080i 59.94/60 Hz 16 : 9 AR (CEA Format #5) is a supported format. */
+		[5] = 0x05,
+
+		/* 1280x720p 59.94/60 Hz 16 : 9 AR (CEA Format #4) is a supported format. */
+		[6] = 0x04,
+
+		/* 720x480p 59.94/60 Hz 16 : 9 AR (CEA Format #3) is a supported format. */
+		[7] = 0x03,
+
+		/* 720x480p 59.94/60 Hz 4 : 3 AR (CEA Format #2) is a supported format. */
+		[8] = 0x02,
+
+		/* 720x480i 59.94/60 Hz 16 : 9 AR (CEA Format #7) is a supported format. */
+		[9] = 0x07,
+
+		/* 720x480i 59.94/60 Hz 4 : 3 AR (CEA Format #6) is a supported format. */
+		[10] = 0x06,
+
+		/* Audio Data Block Tag Code is 1.
+		 * Number of Short Audio Descriptor Bytes is 3.
+		 */
+		[11] = 0x23,
+
+		/* Audio Format Tag Code is 1 --- LPCM is supported.
+		 * Maximum number of audio channels is 2
+		 */
+		[12] = 0x09,
+
+		/* Supported Sampling Frequencies include: 48kHz; 44.1kHz & 32kHz. */
+		[13] = 0x07,
+
+		/* Supported Sampling Bit Rates include: 24 bit; 20 bit & 16 bit. */
+		[14] = 0x07,
+
+		/* Speaker Allocation Block Tag Code is 4.
+		 * Number of Speaker Allocation
+		 * Descriptor Bytes is 3.
+		 */
+		[15] = 0x83,
+
+		/* Speaker Allocation is Front-Left & Front-Right */
+		[16] = 0x01,
+
+		/* Reserved */
+		[17 ... 18] = 0,
+
+		/* Vendor Specific Data Block Tag Code is 3.
+		 * Number of Vendor Specific Data Bytes is 5.
+		 */
+		[19] = 0x65,
+
+		/* 24bit IEEE registration Identifier is 0x000C03 */
+		[20] = 0x03, [21] = 0x0C, [22] = 0x00,
+
+		/* Vendor Specific Data is 0x10000 */
+		[23] = 0x01, [24] = 0x00,
+
+		/* Descriptor Block 5 [18 Bytes] */
+
+		[25] = EDID_PIXEL_CLOCK(74250000u) & 0xFF,
+		[26] = (EDID_PIXEL_CLOCK(74250000u) >> 8) & 0xFF,
+
+		/* Horizontal Addressable Video is 1920px.
+		 * Horizontal Blanking is 280px.
+		 */
+		[27] = 0x80, [28] = 0x18, [29] = 0x71,
+
+		/* Vertical Addressable Video is 540 lines.
+		 * Vertical Blanking is 22 lines.
+		 */
+		[30] = 0x1C, [31] = 0x16, [32] = 0x20,
+
+		[33] = 88u, /* Horizontal Front Porch in pixels */
+		[34] = 44u, /* Horizontal Sync Pulse Width in pixels */
+		[35] = 0x25, /* Vertical Front Porch is 2 lines */
+		[36] = 0x00, /* Vertical Sync Pulse Width is 5 lines */
+
+		/* Image size: 1039mm x 584mm */
+		[37] = 0x0F, [38] = 0x48, [39] = 0x42,
+
+		/* Horizontal and Vertical Border Size is 0 px */
+		[40] = 0u, [41] = 0u,
+
+		/* Timing is Interlaced Video
+		 * Stereo Video is not supported
+		 * Digital Separate Syncs are required
+		 */
+		[42] = 0x9E,
+
+		/* Descriptor Block 6 [18 Bytes] */
+
+		[43] = EDID_PIXEL_CLOCK(74250000u) & 0xFF,
+		[44] = (EDID_PIXEL_CLOCK(74250000u) >> 8) & 0xFF,
+
+		/* Horizontal Addressable Video is 1280px.
+		 * Horizontal Blanking is 370 px.
+		 */
+		[45] = 0x00, [46] = 0x72, [47] = 0x51,
+
+		/* Vertical Addressable Video is 720 lines.
+		 * Vertical Blanking is 30 lines.
+		 */
+		[48] = 0xD0, [49] = 0x1E, [50] = 0x20,
+
+		[51] = 110u, /* Horizontal Front Porch in pixels */
+		[52] = 40u, /* Horizontal Sync Pulse Width in pixels */
+		[53] = 0x55, /* Vertical Front Porch is 5 lines */
+		[54] = 0x00, /* Vertical Sync Pulse Width is 5 lines */
+
+		/* Image size: 1039mm x 584mm */
+		[55] = 0x0F, [56] = 0x48, [57] = 0x42,
+
+		/* Horizontal and Vertical Border Size is 0 px */
+		[58] = 0u, [59] = 0u,
+
+		/* Timing is Non-Interlaced Video
+		 * Stereo Video is not supported
+		 * Digital Separate Syncs are required
+		 */
+		[60] = 0x1E,
+
+		/* Descriptor Block 7 [18 Bytes] */
+
+		[61] = EDID_PIXEL_CLOCK(27000000u) & 0xFF,
+		[62] = (EDID_PIXEL_CLOCK(27000000u) >> 8) & 0xFF,
+
+		/* Horizontal Addressable Video is 1440px.
+		 * Horizontal Blanking is 276 px.
+		 */
+		[63] = 0xA0, [64] = 0x14, [65] = 0x51,
+
+		/* Vertical Addressable Video is 240 lines.
+		 * Vertical Blanking is 23 lines.
+		 */
+		[66] = 0xF0, [67] = 0x16, [68] = 0x00,
+
+		[69] = 38u, /* Horizontal Front Porch in pixels */
+		[70] = 124u, /* Horizontal Sync Pulse Width in pixels */
+		[71] = 0x43, /* Vertical Front Porch is 4 lines */
+		[72] = 0x00, /* Vertical Sync Pulse Width is 3 lines */
+
+		/* Image size: 1039mm x 584mm */
+		[73] = 0x0F, [74] = 0x48, [75] = 0x42,
+
+		/* Horizontal and Vertical Border Size is 0 px */
+		[76] = 0u, [77] = 0u,
+
+		/* Timing is Interlaced Video
+		 * Stereo Video is not supported
+		 * Digital Separate Syncs are required
+		 */
+		[78] = 0x18,
+
+		/* Descriptor Block 8 [18 Bytes] */
+
+		[79] = EDID_PIXEL_CLOCK(27027000u) & 0xFF,
+		[80] = (EDID_PIXEL_CLOCK(27027000u) >> 8) & 0xFF,
+
+		/* Horizontal Addressable Video is 1440px.
+		 * Horizontal Blanking is 276 px.
+		 */
+		[81] = 0xA0, [82] = 0x14, [83] = 0x51,
+
+		/* Vertical Addressable Video is 240 lines.
+		 * Vertical Blanking is 23 lines.
+		 */
+		[84] = 0xF0, [85] = 0x16, [86] = 0x00,
+
+		[87] = 38u, /* Horizontal Front Porch in pixels */
+		[88] = 124u, /* Horizontal Sync Pulse Width in pixels */
+		[89] = 0x43, /* Vertical Front Porch is 4 lines */
+		[90] = 0x00, /* Vertical Sync Pulse Width is 3 lines */
+
+		/* Image size: 1039mm x 584mm */
+		[91] = 0x0F, [92] = 0x48, [93] = 0x42,
+
+		/* Horizontal and Vertical Border Size is 0 px */
+		[94] = 0u, [95] = 0u,
+
+		/* Timing is Interlaced Video
+		 * Stereo Video is not supported
+		 * Digital Separate Syncs are required
+		 */
+		[96] = 0x98,
+
+		[97 ... 126] = 0,
+	};
+
+	ext[127] = get_raw_edid_checksum(ext);
+
+	*state = malloc(sizeof(struct test_state));
+
+	struct test_state ts = {
+		.data_size = sizeof(raw) + sizeof(ext),
+		.data = malloc(sizeof(raw) + sizeof(ext))
+	};
+
+	memcpy(ts.data, &raw, sizeof(raw));
+	memcpy(ts.data + sizeof(raw), &ext[0], sizeof(ext));
+
+	memcpy(*state, &ts, sizeof(ts));
+
+	return 0;
+}
+
+static void test_decode_edid_it_dtv_frame_with_extension(void **state)
+{
+	struct edid out;
+	struct test_state *ts = *state;
+
+	/* In real-life situations frames often are not 100% conformant,
+	 * but are at least correct when it comes to key data fields.
+	 */
+	assert_int_equal(EDID_CONFORMANT,
+			decode_edid((unsigned char *)ts->data, ts->data_size, &out));
+
+	assert_int_equal(32, out.framebuffer_bits_per_pixel);
+	assert_int_equal(8, out.panel_bits_per_color);
+	assert_int_equal(24, out.panel_bits_per_pixel);
+	assert_int_equal(0, out.link_clock);
+	assert_int_equal(1360, out.x_resolution);
+	assert_int_equal(768, out.y_resolution);
+	assert_int_equal(5440, out.bytes_per_line);
+	assert_int_equal(1, out.hdmi_monitor_detected);
+	assert_int_equal(0, strnlen(out.ascii_string, ARRAY_SIZE(out.ascii_string)));
+	assert_string_equal(out.manufacturer_name, EDID_MANUFACTURER_NAME);
+
+	/* Mode */
+	assert_null(out.mode.name);
+	assert_int_equal(85500, out.mode.pixel_clock);
+	assert_int_equal(0, out.mode.lvds_dual_channel);
+	assert_int_equal(0, out.mode.refresh);
+	assert_int_equal(1360, out.mode.ha);
+	assert_int_equal(432, out.mode.hbl);
+	assert_int_equal(64, out.mode.hso);
+	assert_int_equal(112, out.mode.hspw);
+	assert_int_equal(0, out.mode.hborder);
+	assert_int_equal(768, out.mode.va);
+	assert_int_equal(27, out.mode.vbl);
+	assert_int_equal(3, out.mode.vso);
+	assert_int_equal(0, out.mode.vborder);
+	assert_int_equal(43, out.mode.phsync);
+	assert_int_equal(43, out.mode.pvsync);
+	assert_int_equal(0, out.mode.x_mm);
+	assert_int_equal(0, out.mode.y_mm);
+
+	assert_int_equal(1, out.mode_is_supported[EDID_MODE_640x480_60Hz]);
+	assert_int_equal(0, out.mode_is_supported[EDID_MODE_720x480_60Hz]);
+	assert_int_equal(0, out.mode_is_supported[EDID_MODE_1280x720_60Hz]);
+	assert_int_equal(0, out.mode_is_supported[EDID_MODE_1920x1080_60Hz]);
+}
+
+static int teardown_edid_test(void **state)
+{
+	struct test_state *ts;
+
+	if (*state == NULL)
+		return 0;
+
+	ts = (struct test_state *)*state;
+
+	free(ts->data);
+	free(ts);
+
+	return 0;
+}
+
+static void test_edid_set_framebuffer_bits_per_pixel(void **state)
+{
+	struct edid out;
+	struct test_state *ts = *state;
+
+	decode_edid((unsigned char *)ts->data, ts->data_size, &out);
+
+	edid_set_framebuffer_bits_per_pixel(&out, 16, 2);
+
+	assert_int_equal(16, out.framebuffer_bits_per_pixel);
+	assert_int_equal(out.mode.ha * 2, out.bytes_per_line);
+	assert_int_equal(out.bytes_per_line / (16 / 8), out.x_resolution);
+	assert_int_equal(out.mode.va, out.y_resolution);
+
+	edid_set_framebuffer_bits_per_pixel(&out, 24, 4);
+
+	assert_int_equal(24, out.framebuffer_bits_per_pixel);
+	assert_int_equal(out.mode.ha * 3, out.bytes_per_line);
+	assert_int_equal(out.bytes_per_line / (24 / 8), out.x_resolution);
+	assert_int_equal(out.mode.va, out.y_resolution);
+
+	edid_set_framebuffer_bits_per_pixel(&out, 32, 4);
+
+	assert_int_equal(32, out.framebuffer_bits_per_pixel);
+	assert_int_equal(out.mode.ha * 4, out.bytes_per_line);
+	assert_int_equal(out.bytes_per_line / (32 / 8), out.x_resolution);
+	assert_int_equal(out.mode.va, out.y_resolution);
+}
+
+int main(void)
+{
+	const struct CMUnitTest tests[] = {
+		cmocka_unit_test(test_decode_edid_no_edid),
+		cmocka_unit_test(test_decode_edid_invalid_header),
+		cmocka_unit_test_setup_teardown(test_decode_edid_basic_frame,
+						setup_decode_edid_basic_frame,
+						teardown_edid_test),
+		cmocka_unit_test_setup_teardown(test_decode_edid_dtv_frame_with_extension,
+						setup_decode_edid_dtv_frame_with_extension,
+						teardown_edid_test),
+		cmocka_unit_test_setup_teardown(test_decode_edid_it_dtv_frame_with_extension,
+						setup_decode_edid_it_dtv_frame_with_extension,
+						teardown_edid_test),
+		cmocka_unit_test_setup_teardown(test_edid_set_framebuffer_bits_per_pixel,
+						setup_decode_edid_basic_frame,
+						teardown_edid_test),
+	};
+
+	return cmocka_run_group_tests(tests, NULL, NULL);
+}
+
diff --git a/tests/stubs/console.c b/tests/stubs/console.c
index b6a75831b5..0f1dc24725 100644
--- a/tests/stubs/console.c
+++ b/tests/stubs/console.c
@@ -1,6 +1,8 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <console/console.h>
+#include <stdarg.h>
+#include <stdio.h>
 
 int do_printk(int msg_level, const char *fmt, ...)
 {
@@ -11,3 +13,8 @@ int do_vprintk(int msg_level, const char *fmt, va_list args)
 {
 	return 0;
 }
+
+int console_log_level(int msg_level)
+{
+	return 0;
+}