diff --git a/drivers/gpu/drm/display/drm_hdmi_state_helper.c b/drivers/gpu/drm/display/drm_hdmi_state_helper.c
index 24bfc82bf9b02bf3201d97432e3c239ccc8714b4..86f812b89f0e51abc24910898c114d6b08a78edf 100644
--- a/drivers/gpu/drm/display/drm_hdmi_state_helper.c
+++ b/drivers/gpu/drm/display/drm_hdmi_state_helper.c
@@ -16,10 +16,250 @@
  * in the form of KMS helpers.
  *
  * It contains TMDS character rate computation, automatic selection of
  * output formats, infoframes generation, etc.
  *
+ * Infoframes Compliance
+ * ~~~~~~~~~~~~~~~~~~~~~
+ *
+ * Drivers using the helpers will expose the various infoframes
+ * generated according to the HDMI specification in debugfs.
+ *
+ * Compliance can then be tested using a recent-enough ``edid-decode``
+ * version (released after summer 2024). A sample run would look like:
+ *
+ * .. code-block:: bash
+ *
+ *	# edid-decode \
+ *		-I /sys/kernel/debug/dri/1/HDMI-A-1/infoframes/audio \
+ *		-I /sys/kernel/debug/dri/1/HDMI-A-1/infoframes/avi \
+ *		-I /sys/kernel/debug/dri/1/HDMI-A-1/infoframes/hdmi \
+ *		-I /sys/kernel/debug/dri/1/HDMI-A-1/infoframes/hdr_drm \
+ *		-I /sys/kernel/debug/dri/1/HDMI-A-1/infoframes/spd \
+ *		/sys/class/drm/card1-HDMI-A-1/edid \
+ *		-c
+ *
+ *	edid-decode (hex):
+ *
+ *	00 ff ff ff ff ff ff 00 1e 6d f4 5b 1e ef 06 00
+ *	07 20 01 03 80 2f 1a 78 ea 24 05 af 4f 42 ab 25
+ *	0f 50 54 21 08 00 d1 c0 61 40 01 01 01 01 01 01
+ *	01 01 01 01 01 01 56 5e 00 a0 a0 a0 29 50 30 20
+ *	35 00 d1 06 11 00 00 1a 00 00 00 fd 00 3b 3d 1e
+ *	70 1e 00 0a 20 20 20 20 20 20 00 00 00 fc 00 4c
+ *	47 20 53 44 51 48 44 0a 20 20 20 20 00 00 00 ff
+ *	00 32 30 37 4e 54 52 4c 44 43 34 33 30 0a 01 43
+ *
+ *	02 03 29 71 23 09 07 07 4b 01 03 04 90 12 13 1f
+ *	22 5d 5e 5f 83 01 00 00 6d 03 0c 00 10 00 b8 3c
+ *	20 00 60 01 02 03 e2 00 6a 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 ee
+ *
+ *	----------------
+ *
+ *	Block 0, Base EDID:
+ *	  EDID Structure Version & Revision: 1.3
+ *	 Vendor & Product Identification:
+ *	    Manufacturer: GSM
+ *	    Model: 23540
+ *	    Serial Number: 454430 (0x0006ef1e)
+ *	    Made in: week 7 of 2022
+ *	  Basic Display Parameters & Features:
+ *	    Digital display
+ *	    Maximum image size: 47 cm x 26 cm
+ *	    Gamma: 2.20
+ *	    DPMS levels: Standby Suspend Off
+ *	    RGB color display
+ *	    First detailed timing is the preferred timing
+ *	  Color Characteristics:
+ *	    Red  : 0.6835, 0.3105
+ *	    Green: 0.2587, 0.6679
+ *	    Blue : 0.1445, 0.0585
+ *	    White: 0.3134, 0.3291
+ *	  Established Timings I & II:
+ *	    DMT 0x04:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
+ *	    DMT 0x09:   800x600    60.316541 Hz   4:3     37.879 kHz     40.000000 MHz
+ *	    DMT 0x10:  1024x768    60.003840 Hz   4:3     48.363 kHz     65.000000 MHz
+ *	  Standard Timings:
+ *	    DMT 0x52:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz
+ *	    DMT 0x10:  1024x768    60.003840 Hz   4:3     48.363 kHz     65.000000 MHz
+ *	  Detailed Timing Descriptors:
+ *	    DTD 1:  2560x1440   59.950550 Hz  16:9     88.787 kHz    241.500000 MHz (465 mm x 262 mm)
+ *	                 Hfront   48 Hsync  32 Hback   80 Hpol P
+ *	                 Vfront    3 Vsync   5 Vback   33 Vpol N
+ *	    Display Range Limits:
+ *	      Monitor ranges (GTF): 59-61 Hz V, 30-112 kHz H, max dotclock 300 MHz
+ *	    Display Product Name: 'LG SDQHD'
+ *	    Display Product Serial Number: '207NTRLDC430'
+ *	  Extension blocks: 1
+ *	Checksum: 0x43
+ *
+ *	----------------
+ *
+ *	Block 1, CTA-861 Extension Block:
+ *	  Revision: 3
+ *	  Basic audio support
+ *	  Supports YCbCr 4:4:4
+ *	  Supports YCbCr 4:2:2
+ *	  Native detailed modes: 1
+ *	  Audio Data Block:
+ *	    Linear PCM:
+ *	      Max channels: 2
+ *	      Supported sample rates (kHz): 48 44.1 32
+ *	      Supported sample sizes (bits): 24 20 16
+ *	  Video Data Block:
+ *	    VIC   1:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
+ *	    VIC   3:   720x480    59.940060 Hz  16:9     31.469 kHz     27.000000 MHz
+ *	    VIC   4:  1280x720    60.000000 Hz  16:9     45.000 kHz     74.250000 MHz
+ *	    VIC  16:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz (native)
+ *	    VIC  18:   720x576    50.000000 Hz  16:9     31.250 kHz     27.000000 MHz
+ *	    VIC  19:  1280x720    50.000000 Hz  16:9     37.500 kHz     74.250000 MHz
+ *	    VIC  31:  1920x1080   50.000000 Hz  16:9     56.250 kHz    148.500000 MHz
+ *	    VIC  34:  1920x1080   30.000000 Hz  16:9     33.750 kHz     74.250000 MHz
+ *	    VIC  93:  3840x2160   24.000000 Hz  16:9     54.000 kHz    297.000000 MHz
+ *	    VIC  94:  3840x2160   25.000000 Hz  16:9     56.250 kHz    297.000000 MHz
+ *	    VIC  95:  3840x2160   30.000000 Hz  16:9     67.500 kHz    297.000000 MHz
+ *	  Speaker Allocation Data Block:
+ *	    FL/FR - Front Left/Right
+ *	  Vendor-Specific Data Block (HDMI), OUI 00-0C-03:
+ *	    Source physical address: 1.0.0.0
+ *	    Supports_AI
+ *	    DC_36bit
+ *	    DC_30bit
+ *	    DC_Y444
+ *	    Maximum TMDS clock: 300 MHz
+ *	    Extended HDMI video details:
+ *	      HDMI VICs:
+ *	        HDMI VIC 1:  3840x2160   30.000000 Hz  16:9     67.500 kHz    297.000000 MHz
+ *	        HDMI VIC 2:  3840x2160   25.000000 Hz  16:9     56.250 kHz    297.000000 MHz
+ *	        HDMI VIC 3:  3840x2160   24.000000 Hz  16:9     54.000 kHz    297.000000 MHz
+ *	  Video Capability Data Block:
+ *	    YCbCr quantization: No Data
+ *	    RGB quantization: Selectable (via AVI Q)
+ *	    PT scan behavior: Always Underscanned
+ *	    IT scan behavior: Always Underscanned
+ *	    CE scan behavior: Always Underscanned
+ *	Checksum: 0xee  Unused space in Extension Block: 86 bytes
+ *
+ *	----------------
+ *
+ *	edid-decode SHA: 5332a3b76080 2024-11-19 07:53:00
+ *
+ *	Warnings:
+ *
+ *	Block 1, CTA-861 Extension Block:
+ *	  IT Video Formats are overscanned by default, but normally this should be underscanned.
+ *	  Video Data Block: VIC 1 and the first DTD are not identical. Is this intended?
+ *	  Video Data Block: All VICs are in ascending order, and the first (preferred) VIC <= 4, is that intended?
+ *	  Video Capability Data Block: Set Selectable YCbCr Quantization to avoid interop issues.
+ *	  Video Capability Data Block: S_PT is equal to S_IT and S_CE, so should be set to 0 instead.
+ *	  Display Product Serial Number is set, so the Serial Number in the Base EDID should be 0.
+ *	  Add a Colorimetry Data Block with the sRGB colorimetry bit set to avoid interop issues.
+ *	EDID:
+ *	  Base EDID: Some timings are out of range of the Monitor Ranges:
+ *	    Vertical Freq: 24.000 - 60.317 Hz (Monitor: 59.000 - 61.000 Hz)
+ *
+ *	Failures:
+ *
+ *	Block 1, CTA-861 Extension Block:
+ *	  Video Capability Data Block: IT video formats are always underscanned, but bit 7 of Byte 3 of the CTA-861 Extension header is set to overscanned.
+ *	EDID:
+ *	  CTA-861: Native progressive timings are a mix of several resolutions.
+ *
+ *	EDID conformity: FAIL
+ *
+ *	================
+ *
+ *	InfoFrame of '/sys/kernel/debug/dri/1/HDMI-A-1/infoframes/audio' was empty.
+ *
+ *	================
+ *
+ *	edid-decode InfoFrame (hex):
+ *
+ *	82 02 0d 31 12 28 04 00 00 00 00 00 00 00 00 00
+ *	00
+ *
+ *	----------------
+ *
+ *	HDMI InfoFrame Checksum: 0x31
+ *
+ *	AVI InfoFrame
+ *	  Version: 2
+ *	  Length: 13
+ *	  Y: Color Component Sample Format: RGB
+ *	  A: Active Format Information Present: Yes
+ *	  B: Bar Data Present: Bar Data not present
+ *	  S: Scan Information: Composed for an underscanned display
+ *	  C: Colorimetry: No Data
+ *	  M: Picture Aspect Ratio: 16:9
+ *	  R: Active Portion Aspect Ratio: 8
+ *	  ITC: IT Content: No Data
+ *	  EC: Extended Colorimetry: xvYCC601
+ *	  Q: RGB Quantization Range: Limited Range
+ *	  SC: Non-Uniform Picture Scaling: No Known non-uniform scaling
+ *	  YQ: YCC Quantization Range: Limited Range
+ *	  CN: IT Content Type: Graphics
+ *	  PR: Pixel Data Repetition Count: 0
+ *	  Line Number of End of Top Bar: 0
+ *	  Line Number of Start of Bottom Bar: 0
+ *	  Pixel Number of End of Left Bar: 0
+ *	  Pixel Number of Start of Right Bar: 0
+ *
+ *	----------------
+ *
+ *	AVI InfoFrame conformity: PASS
+ *
+ *	================
+ *
+ *	edid-decode InfoFrame (hex):
+ *
+ *	81 01 05 49 03 0c 00 20 01
+ *
+ *	----------------
+ *
+ *	HDMI InfoFrame Checksum: 0x49
+ *
+ *	Vendor-Specific InfoFrame (HDMI), OUI 00-0C-03
+ *	  Version: 1
+ *	  Length: 5
+ *	  HDMI Video Format: HDMI_VIC is present
+ *	  HDMI VIC 1:  3840x2160   30.000000 Hz  16:9     67.500 kHz    297.000000 MHz
+ *
+ *	----------------
+ *
+ *	Vendor-Specific InfoFrame (HDMI), OUI 00-0C-03 conformity: PASS
+ *
+ *	================
+ *
+ *	InfoFrame of '/sys/kernel/debug/dri/1/HDMI-A-1/infoframes/hdr_drm' was empty.
+ *
+ *	================
+ *
+ *	edid-decode InfoFrame (hex):
+ *
+ *	83 01 19 93 42 72 6f 61 64 63 6f 6d 56 69 64 65
+ *	6f 63 6f 72 65 00 00 00 00 00 00 00 09
+ *
+ *	----------------
+ *
+ *	HDMI InfoFrame Checksum: 0x93
+ *
+ *	Source Product Description InfoFrame
+ *	  Version: 1
+ *	  Length: 25
+ *	  Vendor Name: 'Broadcom'
+ *	  Product Description: 'Videocore'
+ *	  Source Information: PC general
+ *
+ *	----------------
+ *
+ *	Source Product Description InfoFrame conformity: PASS
+ *
  * Testing
  * ~~~~~~~
  *
  * The helpers have unit testing and can be tested using kunit with:
  *
