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Mon, 20 Jul 2026 10:52:33 -0700 (PDT) From: Thierry Cantin-Demers To: Jani Nikula , Rodrigo Vivi Cc: =?UTF-8?q?Jouni=20H=C3=B6gander?= , Mika Kahola , intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Thierry Cantin-Demers Subject: [PATCH v2] drm/i915/psr: Disable eDP Panel Replay on XPS 16 DA16260 (LG 0x07C5) Date: Mon, 20 Jul 2026 13:52:29 -0400 Message-ID: <20260720175229.11341-1-thierrycantindemers@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The Dell XPS 16 DA16260 ships in more than one panel variant. The existing quirk that disables Panel Replay on this laptop (added to fix the low refresh rate / stutter in issue #7682) only matches the LG Display panel with DPCD sink OUI 00:22:b9. Another unit of the same laptop (subsystem 1028:0dba) uses an LG Display 0x07C5 panel with sink OUI 00:aa:01. It shows the identical symptom: the internal eDP panel updates at only ~5 fps while external displays stay smooth, with Panel Replay Selective Update stuck (i915_psr_status cycling SLEEP/SU_STANDBY, no error). Because the OUI differs the existing quirk does not match and Panel Replay stays enabled. Add a quirk entry for OUI 00:aa:01 so this variant also gets eDP Panel Replay disabled. Confirmed xe.enable_panel_replay=3D0 and a kernel with this quirk both resolve the stutter. Fixes: cb8d155b0806 ("drm/i915/psr: Disable Panel Replay on Dell XPS 16 DA1= 6260 as a quirk") Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/7682 Signed-off-by: Thierry Cantin-Demers Tested-by: Thierry Cantin-Demers --- Hi Jouni, Thanks for looking. After capturing full drm.debug=3D0xe logs I should correct my original description: this does not appear to be a Link CRC error. That was a one-off reading I have not been able to reproduce. With Panel Replay enabled and the panel stuck at ~5 fps, i915_psr_status just cycles SLEEP / SU_STANDBY with no error, and a full drm.debug dmesg shows nothing. It really seems to be the same low refresh rate / stutter you already handled in issue #7682: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/7682 My machine is the same laptop (XPS 16 DA16260, subsystem 1028:0dba) and seems to reproduce in the same way, including with no external display attached: applying a gamma LUT via wlr-gamma-control (I use gammad) early in the session is enough to leave the panel stuck. The main difference from #7682 is the panel: mine is an LG Display 0x07C5 with DPCD sink OUI 00:aa:01, so the quirk from cb8d155b0806 (which matches 00:22:b9) does not cover it and Panel Replay stays enabled. xe.enable_panel_replay=3D0 resolves it, and a kernel with the quirk extended to 00:aa:01 does too. This v2 drops the CRC wording and references #7682. Happy to test any alternative you prefer. Rather than open a new ticket right away, I went back and captured proper logs, and once the CRC description turned out to be wrong it looked like the same problem as #7682 rather than a new one, so a one-line quirk extension seemed like the least noisy way to handle it. If after this you still think it is something different, just let me know and I will gladly file a fresh gitlab ticket with the full logs. Thanks a lot for your time, Thierry v1 -> v2: - Reword: describe as the #7682 low-refresh-rate stutter, not a CRC error - Add Link: to issue #7682 drivers/gpu/drm/i915/display/intel_quirks.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_quirks.c b/drivers/gpu/drm/= i915/display/intel_quirks.c index 33245f44c0d5..e452235832fe 100644 --- a/drivers/gpu/drm/i915/display/intel_quirks.c +++ b/drivers/gpu/drm/i915/display/intel_quirks.c @@ -286,6 +286,14 @@ static const struct intel_dpcd_quirk intel_dpcd_quirks= [] =3D { .sink_oui =3D SINK_OUI(0x00, 0x22, 0xb9), .hook =3D quirk_disable_edp_panel_replay, }, + /* Dell XPS 16 DA16260 (LG Display 0x07C5, OUI 00:aa:01) */ + { + .device =3D DEVICE_ID_ANY, + .subsystem_vendor =3D 0x1028, + .subsystem_device =3D 0x0dba, + .sink_oui =3D SINK_OUI(0x00, 0xaa, 0x01), + .hook =3D quirk_disable_edp_panel_replay, + }, }; =20 void intel_init_quirks(struct intel_display *display) --=20 2.55.0