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intel-xe@lists.freedesktop.org >> Cc: jani.nikula@linux.intel.com; ville.syrjala@linux.intel.com; >> annoycc@gmail.com; Nautiyal, Ankit K ; >> stable@vger.kernel.org >> Subject: [PATCH] drm/i915/quirks: Limit eDP rate to HBR2 on HP Pavilion Plus >> 14-ew1 >> >> The eDP panel on the HP Pavilion Plus Laptop 14-ew1xxx advertises HBR3 >> while leaving the TPS4 support bit clear. The output however flickers, once >> link is trained with HBR3. >> >> Until commit 8c9006283e4b ("Revert "drm/i915/dp: Reject HBR3 when sink >> doesn't support TPS4"") such sinks were capped at HBR2 by the TPS4 check >> which incidentally kept this panel stable. That check was reverted because >> other panels legitimately need HBR3 without advertising TPS4, and the per- >> machine QUIRK_EDP_LIMIT_RATE_HBR2 was introduced to handle the >> affected machines instead. >> >> Add the machine to the list of devices that need the >> QUIRK_EDP_LIMIT_RATE_HBR2. >> >> Fixes: 8c9006283e4b ("Revert "drm/i915/dp: Reject HBR3 when sink doesn't >> support TPS4"") >> Reported-by: Annoy Cc >> Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/work_items/16743 >> Cc: # v6.18+ >> Tested-by: Annoy Cc >> Signed-off-by: Ankit Nautiyal >> --- >> drivers/gpu/drm/i915/display/intel_quirks.c | 3 +++ >> 1 file changed, 3 insertions(+) >> >> diff --git a/drivers/gpu/drm/i915/display/intel_quirks.c >> b/drivers/gpu/drm/i915/display/intel_quirks.c >> index 33245f44c0d5..7d7db774d8c7 100644 >> --- a/drivers/gpu/drm/i915/display/intel_quirks.c >> +++ b/drivers/gpu/drm/i915/display/intel_quirks.c >> @@ -257,6 +257,9 @@ static struct intel_quirk intel_quirks[] = { >> /* Dell XPS 13 7390 2-in-1 */ >> { 0x8a52, 0x1028, 0x08b0, quirk_edp_limit_rate_hbr2 }, >> >> + /* HP Pavilion Plus Laptop 14-ew1xxx */ >> + { 0x7d55, 0x103c, 0x8c31, quirk_edp_limit_rate_hbr2 }, >> + > LGTM, > Reviewed-by: Nemesa Garg Thanks Nemesa for the review, pushed to drm-intel-next. Regards, Ankit > >> /* Xiaomi Book Pro 14 2026 */ >> { 0xb081, 0x1d72, 0x2424, quirk_disable_psr2 }, }; >> -- >> 2.50.1