[PATCH v7 27/30] drm/tests: edid: Add 4K@60Hz EDID with 600MHz TMDS

From: Cristian Ciocaltea

Date: Mon Jun 01 2026 - 18:48:12 EST

Add a new test EDID advertising the following capabilities:

Max resolution: 3840x2160@60Hz with RGB, YUV444, YUV422, YUV420
Max BPC: 16
Max TMDS clock: 600 MHz

This is needed to exercise the new HDMI infrastructure that decides
whether scrambling needs to be enabled for a given display mode and
to validate that high-rate modes are properly rejected/accepted
depending on the source/sink scrambling capability.

The EDID is derived from test_edid_hdmi_4k_rgb_yuv420_dc_max_340mhz
with the following changes:

- Upgraded the first DTD from 3840x2160@30 (297 MHz) to 3840x2160@60
(594 MHz). The H/V totals (4400x2250) and porches already match the
HDMI 2.0 4K@60Hz standard timing, so only the pixel clock had to be
bumped.
- Widened Display Range Limits descriptor to cover the new timing, i.e.
24-140 kHz H, max dotclock 600 MHz.
- Updated CTA-861 Video Data Block to advertise VIC 97 (4K@60Hz) instead
of VIC 95 (4k30).
- Bumped HF-VSDB Max TMDS Character Rate to 600 MHz, keeping
SCDC_Present set so that the sink advertises scrambling support.
- Cleared HDMI VSDB Max TMDS clock byte, as required by HDMI 2.0 when
the HF-VSDB declares a Max TMDS Character Rate above 340 MHz.
- Provided a Video Capability Data Block advertising selectable RGB and
YCC quantization range plus underscan for IT/CE formats; also set the
'IT Video Formats Underscanned' bit in the CTA-861 extension header to
match.
- Aligned base block image size with the DTD (160x90 cm) and replaced
the bogus 'Week of Manufacture = 0xff' with the Model Year code, both
fixing inherited EDID conformity warnings.
- Dropped the empty YCbCr 4:2:0 Video Data Block inherited from the
parent EDID, which is flagged as a failure by edid-decode v1.33.0

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>
---
drivers/gpu/drm/tests/drm_kunit_edid.h | 128 +++++++++++++++++++++++++++++++++
1 file changed, 128 insertions(+)

diff --git a/drivers/gpu/drm/tests/drm_kunit_edid.h b/drivers/gpu/drm/tests/drm_kunit_edid.h
index f4923157f5bf..9b318f7d364e 100644
--- a/drivers/gpu/drm/tests/drm_kunit_edid.h
+++ b/drivers/gpu/drm/tests/drm_kunit_edid.h
@@ -980,4 +980,132 @@ static const unsigned char test_edid_hdmi_4k_rgb_yuv420_dc_max_340mhz[] = {
0x00, 0x00, 0x00, 0x84
};

+/*
+ * Max resolution: 3840x2160@60Hz with RGB, YUV444, YUV422, YUV420
+ * Max BPC: 16 for all modes
+ * Max TMDS clock: 600 MHz
+ *
+ * edid-decode (hex):
+ *
+ * 00 ff ff ff ff ff ff 00 31 d8 34 00 00 00 00 00
+ * 00 23 01 03 80 a0 5a 78 0f ee 91 a3 54 4c 99 26
+ * 0f 50 54 20 00 00 01 01 01 01 01 01 01 01 01 01
+ * 01 01 01 01 01 01 08 e8 00 30 f2 70 5a 80 b0 58
+ * 8a 00 40 84 63 00 00 1e 00 00 00 fc 00 54 65 73
+ * 74 20 45 44 49 44 0a 20 20 20 00 00 00 fd 00 18
+ * 55 18 8c 3c 00 0a 20 20 20 20 20 20 00 00 00 10
+ * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 a9
+ *
+ * 02 03 28 b1 41 61 6c 03 0c 00 10 00 78 00 20 00
+ * 00 01 03 6d d8 5d c4 01 78 80 07 00 00 00 00 00
+ * 00 e2 00 ca e3 0f 01 00 00 00 00 00 00 00 00 00
+ * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 54
+ *
+ * ----------------
+ *
+ * Block 0, Base EDID:
+ * EDID Structure Version & Revision: 1.3
+ * Vendor & Product Identification:
+ * Manufacturer: LNX
+ * Model: 52
+ * Made in: 2025
+ * Basic Display Parameters & Features:
+ * Digital display
+ * Maximum image size: 160 cm x 90 cm
+ * Gamma: 2.20
+ * RGB color display
+ * Default (sRGB) color space is primary color space
+ * First detailed timing is the preferred timing
+ * Supports GTF timings within operating range
+ * Color Characteristics:
+ * Red : 0.6396, 0.3300
+ * Green: 0.2998, 0.5996
+ * Blue : 0.1503, 0.0595
+ * White: 0.3125, 0.3291
+ * Established Timings I & II:
+ * DMT 0x04: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz
+ * Standard Timings: none
+ * Detailed Timing Descriptors:
+ * DTD 1: 3840x2160 60.000000 Hz 16:9 135.000 kHz 594.000000 MHz (1600 mm x 900 mm)
+ * Hfront 176 Hsync 88 Hback 296 Hpol P
+ * Vfront 8 Vsync 10 Vback 72 Vpol P
+ * Display Product Name: 'Test EDID'
+ * Display Range Limits:
+ * Monitor ranges (GTF): 24-85 Hz V, 24-140 kHz H, max dotclock 600 MHz
+ * Dummy Descriptor:
+ * Extension blocks: 1
+ * Checksum: 0xa9
+ *
+ * ----------------
+ *
+ * Block 1, CTA-861 Extension Block:
+ * Revision: 3
+ * Underscans IT Video Formats by default
+ * Supports YCbCr 4:4:4
+ * Supports YCbCr 4:2:2
+ * Native detailed modes: 1
+ * Video Data Block:
+ * VIC 97: 3840x2160 60.000000 Hz 16:9 135.000 kHz 594.000000 MHz
+ * Vendor-Specific Data Block (HDMI), OUI 00-0C-03:
+ * Source physical address: 1.0.0.0
+ * DC_48bit
+ * DC_36bit
+ * DC_30bit
+ * DC_Y444
+ * Maximum TMDS clock: 0 MHz
+ * Extended HDMI video details:
+ * Vendor-Specific Data Block (HDMI Forum), OUI C4-5D-D8:
+ * Version: 1
+ * Maximum TMDS Character Rate: 600 MHz
+ * SCDC Present
+ * Supports 16-bits/component Deep Color 4:2:0 Pixel Encoding
+ * Supports 12-bits/component Deep Color 4:2:0 Pixel Encoding
+ * Supports 10-bits/component Deep Color 4:2:0 Pixel Encoding
+ * VRRmin: 0 Hz
+ * VRRmax: 0 Hz
+ * Video Capability Data Block:
+ * YCbCr quantization: Selectable (via AVI YQ)
+ * RGB quantization: Selectable (via AVI Q)
+ * PT scan behavior: No Data
+ * IT scan behavior: Always Underscanned
+ * CE scan behavior: Always Underscanned
+ * YCbCr 4:2:0 Capability Map Data Block:
+ * VIC 97: 3840x2160 60.000000 Hz 16:9 135.000 kHz 594.000000 MHz
+ * Checksum: 0x54 Unused space in Extension Block: 87 bytes
+ *
+ * ----------------
+ *
+ * edid-decode 1.33.0
+ *
+ * EDID conformity: PASS
+ */
+static const unsigned char test_edid_hdmi_4k_rgb_yuv420_dc_max_600mhz[] = {
+ 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x31, 0xd8, 0x34, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x23, 0x01, 0x03, 0x80, 0xa0, 0x5a, 0x78,
+ 0x0f, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0x20,
+ 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x08, 0xe8, 0x00, 0x30, 0xf2, 0x70,
+ 0x5a, 0x80, 0xb0, 0x58, 0x8a, 0x00, 0x40, 0x84, 0x63, 0x00, 0x00, 0x1e,
+ 0x00, 0x00, 0x00, 0xfc, 0x00, 0x54, 0x65, 0x73, 0x74, 0x20, 0x45, 0x44,
+ 0x49, 0x44, 0x0a, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x18,
+ 0x55, 0x18, 0x8c, 0x3c, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+ 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xa9, 0x02, 0x03, 0x28, 0xb1,
+ 0x41, 0x61, 0x6c, 0x03, 0x0c, 0x00, 0x10, 0x00, 0x78, 0x00, 0x20, 0x00,
+ 0x00, 0x01, 0x03, 0x6d, 0xd8, 0x5d, 0xc4, 0x01, 0x78, 0x80, 0x07, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0xe2, 0x00, 0xca, 0xe3, 0x0f, 0x01, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x54,
+};
+
#endif // DRM_KUNIT_EDID_H_

--
2.54.0