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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3EEC3C433EF for ; Thu, 28 Apr 2022 13:19:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347128AbiD1NXG (ORCPT ); Thu, 28 Apr 2022 09:23:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46722 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245525AbiD1NXE (ORCPT ); Thu, 28 Apr 2022 09:23:04 -0400 Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E1C4D94188; Thu, 28 Apr 2022 06:19:48 -0700 (PDT) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: kholk11) with ESMTPSA id A8C9A1F4536D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1651151987; bh=Y6r9EqSsbh3Dq7eavxiGIUP0pwnIFPvRrJcfm6QBnE8=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=HEe0sCPkAkBWKZhzzUzZdry5WIJSxY16gc5VTbcu1Iyil/jW5t1lblH6ZqHf2Lt8C tiuM8VRrJwFmYeZkQN2rfaI6SPqlYGF6+1F2S2pOkpVBM8ovivkkJNQco9jS8F3BM5 3YxtmrigFaC8xRHW1vhw9UdHMzkzmj7oiUTSvUD5ov/B/RhGRkOnZRIN4qOogvE6S2 Cxun4IVDrPxULNPup5cydHWqsrr61aCcOX208KEOdAfFsGonglKjlezDsgnTQpXH7i sdlrxLr7Lw8QEkT/MmxCyRu6PrYFUEYJY5ou/byucvEqeX5chpKT/5PtuQF+m5UJdj KTe6P5o2Fpz3Q== Message-ID: <88ddf1ba-9395-cd40-53f5-25d1d2f9ef9e@collabora.com> Date: Thu, 28 Apr 2022 15:19:44 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: [PATCH v4, 1/1] drm/mediatek: add lut diff flag for new gamma hardware support Content-Language: en-US To: Yongqiang Niu , Chun-Kuang Hu Cc: Rob Herring , Matthias Brugger , Philipp Zabel , David Airlie , Daniel Vetter , Jassi Brar , Fabien Parent , Dennis YC Hsieh , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Project_Global_Chrome_Upstream_Group@mediatek.com, Hsin-Yi Wang , Yongqiang Niu References: <20220428085829.15855-1-yongqiang.niu@mediatek.com> <20220428085829.15855-2-yongqiang.niu@mediatek.com> From: AngeloGioacchino Del Regno In-Reply-To: <20220428085829.15855-2-yongqiang.niu@mediatek.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Il 28/04/22 10:58, Yongqiang Niu ha scritto: > From: Yongqiang Niu > > mt8183 gamma module usage is different with before soc, > gamma odd(index start from 0) lut value set to hardware > register should be > the difference of current lut value with last lut value. > > for example, chrome os user space set lut > like this(only r chanel for example): > 2 4 6 8 10 12. > 1) mt8183 gamma driver should set the gamma lut to hardware > register like this: > 2 [2] 6 [2] 10 [2] > the value with [] is the difference value > 2)gamma hardware process display data with original lut > > Signed-off-by: Yongqiang Niu Reviewed-by: AngeloGioacchino Del Regno