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 462DCC3600C for ; Mon, 31 Mar 2025 09:47:57 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B5D6510E3B9; Mon, 31 Mar 2025 09:47:56 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.b="PpQOmUtZ"; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id ADB6B10E3B9 for ; Mon, 31 Mar 2025 09:47:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1743414473; 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: in-reply-to:in-reply-to:references:references; bh=Z62G6FOx16kflbgrYyqknAXqyOjvzup3mMmRwxYCUyQ=; b=PpQOmUtZqjQWtbjqEqHovD407b3RBfvAtihRgjcmSYWGTF7eKWwf5MtiYFVsdVVJocIDS8 2v+Sa9CBgjYC0D3+n4YT8nwQ29i4Zcv1J7WOE2FqtlZqUt90Qu3Lfb9cmAaej1feDIHOhS z3PFRr0xDGudBRa422sZNt3O2MWEaHQ= Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-34-3stqsreEN8WZjO_jbFiLAg-1; Mon, 31 Mar 2025 05:47:52 -0400 X-MC-Unique: 3stqsreEN8WZjO_jbFiLAg-1 X-Mimecast-MFC-AGG-ID: 3stqsreEN8WZjO_jbFiLAg_1743414471 Received: by mail-wr1-f71.google.com with SMTP id ffacd0b85a97d-3912fc9861cso1668942f8f.1 for ; Mon, 31 Mar 2025 02:47:52 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1743414471; x=1744019271; h=mime-version:message-id:date:references:in-reply-to:subject:cc:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Z62G6FOx16kflbgrYyqknAXqyOjvzup3mMmRwxYCUyQ=; b=Muti0HSXPGd8lBYglgakhgH4EpGlW+pG2sXRIs7TbvQbLeFfXQmVRSXapiJcXEyJrJ zz4uRA3n1/Ko+Dx284/6L5mZs/hu3sbJOCq006wBfEQ3cv5NiwHC1KJCyuctmbPV9ln0 GBS053BRKCAqDWjkVVBB5evLrBulk3njNPcQRAd9mwGFhzeSIuoZQGW3XC0zLs2Orfzg Spucpko2QkZeZeuCEIZq/zzAxKceYr3Yb0slH7toq+cEOi9lC9pdZLev05/cueaMvUGB xQg7a7gKCEyVefeyj9sbtUZcowNxVz9BQJdn+9msxw7eQrlPdhGKrYMK2eN6MCvKqRe3 Im0Q== X-Gm-Message-State: AOJu0YxFX0XmjXzno4EMblRpe5lNLoc5OXO7etcFOjfGu7b5YLwvhVjt rLubIph5/VL5TkUFHJ/JtQRDsENw0RQ0H+vVDjAXVlw7psmgIBaEcsTZogWwVkVHNj+mWt+hIUW txfYuI8iKsvlPjUtrOy+eQRVRPTpYr5lQd/xpsTHpk0dz2XNP4uFTEg04WfJWwk4DGw== X-Gm-Gg: ASbGncve2TtKoZxmVNzDT0PX6jfuCniynR0YdCoRlAjC9A9Om4HmuHR/EhiS5c3IEyy CLjiTAkc7ajlF5MsgNllOiWypwDHwItsbb3FA8YQR/WzBlykyrw1y2o2l/5Kn1Y64n7FCOjGK8E tmKR/UdIXyo7qok7w0tdjx1Dq5a4CFaWfQa+aIQBtGcG/Oj5xP2yV8q6lmuVCUbnXUFmJ4THs3K 83T79JdE/I7a21UTqENjIcuXPjoSk4G7ZNI+SSpP6vF7TwccM+stsT4C8Bor1wCP/MdRwzEYV8U Rs5XNBNQSX8qP9pbi2DF5omDntVRucS8Bs94NAtYlqrb6g== X-Received: by 2002:a5d:5f8c:0:b0:390:eebc:6f32 with SMTP id ffacd0b85a97d-39c1211c6cemr7180719f8f.48.1743414471212; Mon, 31 Mar 2025 02:47:51 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFE05gPUp5Apq96EIEopu3LwlC0VSzuIjtFyw+pOhK13JZmbsAWiDz2MPpXVrdNvGVqk9inDQ== X-Received: by 2002:a5d:5f8c:0:b0:390:eebc:6f32 with SMTP id ffacd0b85a97d-39c1211c6cemr7180707f8f.48.1743414470927; Mon, 31 Mar 2025 02:47:50 -0700 (PDT) Received: from localhost ([195.166.127.210]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43d82efeb11sm160962185e9.22.2025.03.31.02.47.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 31 Mar 2025 02:47:50 -0700 (PDT) From: Javier Martinez Canillas To: Thomas Zimmermann , simona@ffwll.ch, airlied@gmail.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org Cc: dri-devel@lists.freedesktop.org, Thomas Zimmermann Subject: Re: [PATCH 18/18] drm/sysfb: vesadrm: Add gamma correction In-Reply-To: <20250319083021.6472-19-tzimmermann@suse.de> References: <20250319083021.6472-1-tzimmermann@suse.de> <20250319083021.6472-19-tzimmermann@suse.de> Date: Mon, 31 Mar 2025 11:47:49 +0200 Message-ID: <87r02dfs56.fsf@minerva.mail-host-address-is-not-set> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: xTpYy11CsxWGv5LNcTw4Vh9W9QFQmDVWtCXIYx4xGeA_1743414471 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Thomas Zimmermann writes: > Add palette support and export GAMMA properties via sysfs. User-space > compositors can use this interface for programming gamma ramps or night > mode. > > Vesadrm supports palette updates via VGA DAC registers or VESA palette > calls. Up to 256 palette entries are available. Userspace always supplies > gamma ramps of 256 entries. If the native color format does not match > this because pixel component have less then 8 bits, vesadrm interpolates > among the palette entries. > > The code uses CamelCase style in a few places to match the VESA manuals. > > Signed-off-by: Thomas Zimmermann > --- Reviewed-by: Javier Martinez Canillas -- Best regards, Javier Martinez Canillas Core Platforms Red Hat