From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.tuxedocomputers.com (mail.tuxedocomputers.com [157.90.84.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C78A11EB36 for ; Wed, 9 Jul 2025 11:49:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=157.90.84.7 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752061795; cv=none; b=Bx4Ma8i/o0vmEvu1TQBu72/X8uQjvAgrlV0/V9hZQhST322s+Kp8SXgArCp3epuinWWIlF7OKr6+ROXqgfKA0xxgnrSsS4Mi9xMFDX+kp5kZwmBEroMlWLSBQ0UuX8p/RXIg1aVliSuoFKg94hcto1z58FvjhP+cMKBUxDCkJI0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752061795; c=relaxed/simple; bh=5i2zcGivKE1mLIrk15Rq0Nf/cqjgo46vZNf10mEXShc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=fNHEgoPe0dWXTcYnhS5YV3LuBmKlWooA6He1DBO9lDVbXAcaTuwhfmb/ZPa2YE69kBPzKKRLTwV99Hk01FYtAoVdl5Lj0lvg1PDPyGq0Gt3DHSXCnUObOASluI3qo9BoUEnxo1M5OPQntE3uhlZm0qD6AIBR5Kh7xSbHK0jhaCs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=tuxedocomputers.com; spf=pass smtp.mailfrom=tuxedocomputers.com; dkim=pass (1024-bit key) header.d=tuxedocomputers.com header.i=@tuxedocomputers.com header.b=uPsDAqc6; arc=none smtp.client-ip=157.90.84.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=tuxedocomputers.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=tuxedocomputers.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=tuxedocomputers.com header.i=@tuxedocomputers.com header.b="uPsDAqc6" Received: from [192.168.42.116] (p5b1645eb.dip0.t-ipconnect.de [91.22.69.235]) (Authenticated sender: wse@tuxedocomputers.com) by mail.tuxedocomputers.com (Postfix) with ESMTPSA id 326C52FC004A; Wed, 9 Jul 2025 13:49:42 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuxedocomputers.com; s=default; t=1752061783; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Z4tPrpohIKzA9dpzM7fgM3lnG/w3QgoJ+fb9JhKfdC4=; b=uPsDAqc6/GRcnySbr4rLZwJ33I0X5BpdBk4Q51cS1ERVD7G8HdXp5zP98woiX7YiTJqH/D oY+zZo39jMWR5dGAV6x5IYJgb2RbPK79kNq8koKODyfO/M0RLOt0L/JW8obNrLD+Ea6m+D Eep5mkPx9ZXWPpSUdsRE54IHXFb4vGw= Authentication-Results: mail.tuxedocomputers.com; auth=pass smtp.auth=wse@tuxedocomputers.com smtp.mailfrom=wse@tuxedocomputers.com Message-ID: <513aa035-8a00-4943-abc1-d68824a5c0c6@tuxedocomputers.com> Date: Wed, 9 Jul 2025 13:49:42 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 0/1] drm/i915/display: Avoid unsupported 300Hz output mode on a TUXEDO device To: Rodrigo Vivi , t.guttzeit@tuxedocomputers.com Cc: Jani Nikula , Joonas Lahtinen , Tvrtko Ursulin , David Airlie , Simona Vetter , intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <20250704192007.526044-1-wse@tuxedocomputers.com> Content-Language: en-US From: Werner Sembach In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi all, Am 08.07.25 um 23:05 schrieb Rodrigo Vivi: > On Fri, Jul 04, 2025 at 09:03:45PM +0200, Werner Sembach wrote: >> RFC because I'm not sure if this is the right approach. > Could you please file a gitlab issue for us so we can get someone from our > display team to take a look and see if there's anything else that could be done > before we take the quirk route? > > https://drm.pages.freedesktop.org/intel-docs/how-to-file-i915-bugs.html Tim can you follow up with this? Reducing the communication chain to avoid dropping information. Best regards, Werner Sembach > > Thanks for the investigation and the quirk, > Rodrigo. > >> 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 >>