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From: Jerome Tollet <jerome.tollet@gmail.com>
To: intel-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Subject: Re: [RESEND] drm/i915/hdmi: Poll for 200 msec for TMDS_Scrambler_Status
Date: Sat, 21 Feb 2026 08:37:24 +0100	[thread overview]
Message-ID: <20260221073724.85291-1-jtollet@cisco.com> (raw)
In-Reply-To: <[email protected]>

Hi Ankit,

I've completed isolated testing and can confirm the SCDC polling patch works perfectly.

Test results:
- Kernel: 6.19.2
- Hardware: Intel Alder Lake-N (N100) with integrated UHD Graphics
- Display: Cisco Desk Pro (CS-DESKPRO-2) 4K@60Hz via HDMI 2.0
- Status: 4K@60Hz (3840x2160@60Hz) working correctly
- Result: Stable display, no corruption, works across reboots

The SCDC polling approach is also more consistent with other implementations
like Windows, which performs similar SCDC polling after port enable.

Relevant dmesg output:
[    5.491988] i915: loading out-of-tree module taints kernel.
[    6.104904] i915 0000:00:02.0: [drm] Found alderlake_p/alderlake_n (device ID 46d1) integrated display version 13.00 stepping D0
[    6.218551] i915 0000:00:02.0: [drm] GT0: GuC firmware i915/tgl_guc_70.bin version 70.49.4
[    6.268439] [drm] Initialized i915 1.6.0 for 0000:00:02.0 on minor 1
[    6.691347] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer device

Thanks,
Jerome

       reply	other threads:[~2026-02-23 13:54 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <[email protected]>
2026-02-21  7:37 ` Jerome Tollet [this message]
     [not found] <20260113143107.1446909-1-ankit.k.nautiyal@intel.com>
2026-03-26  5:41 ` [RESEND] drm/i915/hdmi: Poll for 200 msec for TMDS_Scrambler_Status Jerome Tollet
2026-04-01 11:23   ` Ville Syrjälä
2026-04-01 12:26     ` Jerome Tollet
2026-05-05  5:37 ` Jerome Tollet
2026-01-28 10:12 Jérôme Tollet
2026-02-07  3:14 ` Jérôme Tollet
2026-02-14 16:17   ` Jérôme Tollet
2026-02-17  8:14     ` Nautiyal, Ankit K
  -- strict thread matches above, loose matches on Subject: below --
2026-01-13 13:38 Ankit Nautiyal
2026-01-13 21:39 ` Ville Syrjälä
2026-01-21 12:56   ` Nautiyal, Ankit K
2026-02-19 15:45     ` Jerome Tollet
2026-02-27 13:16     ` Jerome Tollet
2026-02-27 14:03       ` Nautiyal, Ankit K

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