From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 61EF71E0DD8; Wed, 30 Sep 2026 16:59:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790787580; cv=none; b=GbvNy8CufS18HKMEbZ44KqUqxOwXzN3foFtDZmU6PmOx1OP+1occjVj+7n6OMPCMf8gGzG9f7stZZCBKNkqufavMnd1ByLsV54Vi+0+cgjD67FV2KT3TeBS+idyffqjFYorbTiWPH3liA8tQI5Dp0jWUqm/CYN6sYjviIz0x0ec= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790787580; c=relaxed/simple; bh=HbjCuLkDxsEpZxR37rRE1qUVEWbUBRFjngcvzVAWfLY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=j5QWizSt9vlTOHajHnxrjSOrAN6F0v8CW02YCkNUGWc8Qzcl95Pli6Phh2ocpy9oh9/D3KJjlvPfeYqsmgBC1vVlnDhx8a/9rG4dyK1YAiLqiu00udFGYFQTuUYru1tvdTSR5mHe0h0eu8B3HjxZyPO3KxjOlzGvG8Ipr9INAeg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Y+Xo1Y5x; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Y+Xo1Y5x" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BC17F1F00898; Wed, 30 Sep 2026 16:59:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790787579; bh=fHYsLuYg3pxIvOqpzMh6kYqg5pSW9POByBBhva2hM68=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Y+Xo1Y5xvzj/ng409l8IGnaLZIJG4LG+DAfBsK1Cu1N/eDilDUcVHYTPNaPyxFVxY 2cpucS/s4NgwXXbldyZOO2U07za3ArYO07YCBZ1bhlm3aChiYvczl0e3+s4xstPrJ6 vS18S6JJZ7u+LY8wQplvMCum/mYoh2VBkTRrkUWg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Annoy Cc , Ankit Nautiyal , Nemesa Garg , Jani Nikula Subject: [PATCH 7.2 279/457] drm/i915/quirks: Limit eDP rate to HBR2 on HP Pavilion Plus 14-ew1 Date: Wed, 30 Sep 2026 17:26:24 +0200 Message-ID: <20260930152352.057197067@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152346.024115587@linuxfoundation.org> References: <20260930152346.024115587@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ankit Nautiyal commit 5271d81f99dd01d983d439930eb056952485e15e upstream. 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 Reviewed-by: Nemesa Garg Link: https://patch.msgid.link/20260907034555.2753846-1-ankit.k.nautiyal@intel.com (cherry picked from commit 550b703fdbb2a2022faa75b4b11ab135241afbd9) Signed-off-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/display/intel_quirks.c | 3 +++ 1 file changed, 3 insertions(+) --- 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 }, + /* Xiaomi Book Pro 14 2026 */ { 0xb081, 0x1d72, 0x2424, quirk_disable_psr2 }, };