From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mrs.ro (mrs.ro [142.132.237.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id D9B0413B5B3; Tue, 23 Jun 2026 18:33:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=142.132.237.1 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782239617; cv=none; b=TCBpEKUMGqcnDajq35PAViT34Ba6VzNNqoEWAtPjHdtG/eYQRmeGmrjE45U0/serBdWfePieCj29FL+fXrIM/EYlhjHKNA3n21AVy0u/FLw58nqz3/PM7FxBw7CEAZhO7cvBFnFXVS9+HnNAf7qEwTuuapETGKgkU3WeHwIT0hM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782239617; c=relaxed/simple; bh=XrHhZiPLRFdDnfe75B5Sj5kViTe/S8yPL5sa8BZ8ClU=; h=Message-ID:Date:MIME-Version:To:Cc:References:Subject:From: In-Reply-To:Content-Type; b=s4F25ZeblpxprIbCELI2m9NEfetuLMYG765EBJlkEg3x9vxn66i8jWuFnfxOVfakhvBCnqzLoiYGam3KrvqS/lsNgZyYR7ux9qqfFc9/JNo0vBlqoOteHZx4NJTn6F6DSqFwvv8IrRlDj+X/GspL9YNvF67rR7RwQxBO+ZALzH0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mrs.ro; spf=pass smtp.mailfrom=mrs.ro; dkim=pass (2048-bit key) header.d=mrs.ro header.i=@mrs.ro header.b=JG7pVemT; arc=none smtp.client-ip=142.132.237.1 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mrs.ro Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mrs.ro Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mrs.ro header.i=@mrs.ro header.b="JG7pVemT" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mrs.ro; s=mail; t=1782239231; bh=XrHhZiPLRFdDnfe75B5Sj5kViTe/S8yPL5sa8BZ8ClU=; h=Date:To:Cc:References:Subject:From:In-Reply-To:From; b=JG7pVemTi5vz8uX1ktlfjD/UssavmJw2HOunU6lxRc7HTyRUDwuICJa5d9/fWdfcN 3Max0v4cnX/5MnTpM37jng/PJT7YpVff07jbfwJNswyE4MntlNp6DLqlr/USfjXTGn JpXIe+e9rENoVRExgmxag855hVPhpDjRa2m6cRi7OoIUmPi53yti3FbpXgKbvaLvj9 fWj1l7l3lOBNLOotKMOQtnpJZCNq2iC0xjq8eRmInAumhiI0qqrxrEpdFkijnq1B57 LCzrUtLTSoyDy3eFrNagxYGBiL8SEoI/ZjM+md6nMhBNJQF58TMLkuupOi3uhJHOWN HFZppnNMCu9Nw== Received: from [192.168.1.103] (81-197-255-239.elisa-laajakaista.fi [81.197.255.239]) by mrs.ro (Postfix) with ESMTPSA id F0D941467FE2; Tue, 23 Jun 2026 21:27:10 +0300 (EEST) Message-ID: <2095cb86-6729-41f3-a0f3-b806d6acafd3@mrs.ro> Date: Tue, 23 Jun 2026 21:27:02 +0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Betterbird (Linux) To: mail@etehtsea.me Cc: andersson@kernel.org, conor+dt@kernel.org, devicetree@vger.kernel.org, konradybcio@kernel.org, krzk+dt@kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, robh@kernel.org References: <20260515172926.16597-1-mail@etehtsea.me> Subject: Re: [PATCH v2 0/4] Introduce HONOR MagicBook Art 14 device tree Content-Language: en-US From: Valentin Manea In-Reply-To: <20260515172926.16597-1-mail@etehtsea.me> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi > I'm using it with an external display connected to the HDMI port as > a daily driver for quite some time now. > > eDP support is broken (screen is eigher grey or grey with noise), > thus, keeping it disabled for now. The reason for the eDP problems is that the firmware enables DSC for the panel at boot, but the msm driver does not yet support it. There are some patches floating around to add the functionality but they seem to have some problems. In the repo with my name that you quoted I have integrated them for testing, but as they are they already have been rejected for mainline, so I think we just need to wait for qualcomm or linaro to finish their work. Now I have a simpler solution for this problem, I just made a copy of the one of the eDP panel drivers and do a force disable of DSC on resume, which seems to work perfectly fine, there is enough bandwidth to drive the panel even at 120Hz even with DSC disabled. You can find my patch in the quoted repository in the qcom-x1e-7.0 branch. If this is an acceptable solution I will cleanup the patch more and post it here. Perhaps the other solution is for the msm driver to disable DSC explicitly for panels that advertise it, because it might be enabled by bootloaders/firmware. Valentin