From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E6E42C8303C for ; Mon, 7 Jul 2025 12:59:57 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4F9BF10E01F; Mon, 7 Jul 2025 12:59:56 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=tuxedocomputers.com header.i=@tuxedocomputers.com header.b="F4ulFDGP"; dkim-atps=neutral Received: from mail.tuxedocomputers.com (mail.tuxedocomputers.com [157.90.84.7]) by gabe.freedesktop.org (Postfix) with ESMTPS id D113210E09E; Fri, 4 Jul 2025 19:20:25 +0000 (UTC) Received: from wse-pc.fritz.box (pd9e59880.dip0.t-ipconnect.de [217.229.152.128]) (Authenticated sender: wse@tuxedocomputers.com) by mail.tuxedocomputers.com (Postfix) with ESMTPA id CECFC2FC00A2; Fri, 4 Jul 2025 21:20:22 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxedocomputers.com; s=default; t=1751656823; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=hfOhpq8fyOjaZ56cdFC/wn/8XOnBTOc0qDrbyCqpV9k=; b=F4ulFDGP6WyMJHaMAse7nkNMyECngO4ZXyITARDd188ZhSZYDkUaic7mBEfNfE+5w3UK3f O4nqweDNvunSUChrr9HOLaD7ySmR4jX05FFg4NwEJwn5MZCak+lzNdV1RabvS0/t60YlLJ XsBK6FnA9G9xEzTP1ZtiFnum+E80sX4= Authentication-Results: mail.tuxedocomputers.com; auth=pass smtp.auth=wse@tuxedocomputers.com smtp.mailfrom=wse@tuxedocomputers.com From: Werner Sembach To: Jani Nikula , Rodrigo Vivi , Joonas Lahtinen , Tvrtko Ursulin , David Airlie , Simona Vetter Cc: Werner Sembach , intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 0/1] drm/i915/display: Avoid unsupported 300Hz output mode on a TUXEDO device Date: Fri, 4 Jul 2025 21:03:45 +0200 Message-ID: <20250704192007.526044-1-wse@tuxedocomputers.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Mailman-Approved-At: Mon, 07 Jul 2025 12:59:55 +0000 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" RFC because I'm not sure if this is the right approach. The flicker manifests ever few seconds 1-3 black frames in quick succession. On windows 300Hz can not be selected for the iGPU, but the panel advertises it. A cleaner solution would probably to go over the pixel clock, but for this device there is only one 300Hz mode in the panels edid and that is at the nativ resolution. Chroma subsampling was not tested as linux afaik offers no way to easily enforce it for intel gpus. Tim Guttzeit (1): drm/i915/display: Avoid unsupported output mode with 300Hz on TUXEDO device drivers/gpu/drm/i915/display/intel_dp.c | 5 ++++ drivers/gpu/drm/i915/display/intel_quirks.c | 30 +++++++++++++++++++++ drivers/gpu/drm/i915/display/intel_quirks.h | 1 + 3 files changed, 36 insertions(+) -- 2.43.0