From patchwork Thu Sep 22 11:33:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 12985009 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 7E857C6FA82 for ; Thu, 22 Sep 2022 11:33:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229577AbiIVLdM (ORCPT ); Thu, 22 Sep 2022 07:33:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60776 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229453AbiIVLdL (ORCPT ); Thu, 22 Sep 2022 07:33:11 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9C4DCE21CE for ; Thu, 22 Sep 2022 04:33:10 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 5A342219BD; Thu, 22 Sep 2022 11:33:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1663846389; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=TQvMpeIy7cygWqyqnF1hlTB6kVkyGdVkV1T4Po87npQ=; b=yoCkJLCmKv8hjDuBTEAxfYkwO6rYLGOkvlqDKfieQD/MWidBdDOIkYYwaaJ7h8WDuBmMWZ LITnul/r2/iXXtdkY5HoAfduyI+T2LSHgeM6m5nRqyEZkLUlhxDqEX0FbkN6ZkR4Ac0XFK wC2Ob+za9ideUna+yvUTh439N8PnN5I= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1663846389; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=TQvMpeIy7cygWqyqnF1hlTB6kVkyGdVkV1T4Po87npQ=; b=lnoHL8kIiwZUq//J3yGz5E0Z7C2tvQq9m6s6ry3OE1hQZ5cUlAjIjFI34WZfpzqR7yS3hD D+ESSk4MRR3L2sBA== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 081CB13AA5; Thu, 22 Sep 2022 11:33:09 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id KAsVAfVHLGPyPAAAMHmgww (envelope-from ); Thu, 22 Sep 2022 11:33:09 +0000 From: Thomas Zimmermann To: javierm@redhat.com, airlied@linux.ie, daniel@ffwll.ch, deller@gmx.de, maxime@cerno.tech, sam@ravnborg.org, msuchanek@suse.de, mpe@ellerman.id.au, benh@kernel.crashing.org, paulus@samba.org, geert@linux-m68k.org, mark.cave-ayland@ilande.co.uk Cc: linux-fbdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, dri-devel@lists.freedesktop.org, Thomas Zimmermann Subject: [PATCH v3 0/4] drm: Add driver for PowerPC OF displays Date: Thu, 22 Sep 2022 13:33:02 +0200 Message-Id: <20220922113306.11251-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.37.3 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org PowerPC's Open Firmware offers a simple display buffer for graphics output. Add ofdrm, a DRM driver for the device. As with the existing simpledrm driver, the graphics hardware is pre-initialized by the firmware. The driver only provides blitting, no actual DRM modesetting is possible. For version 3 of this patchset, all preparatory changes have been merged into the DRM codebase. Only ofdrm changes are left. Patch 1 adds ofdrm, which has again been significantly reworked. The FWFB library has been removed infavor of various functions in existing DRM helper libraries. Ofdrm now supports damage iterators and synchronization for imported GEM BOs. Patches 2 to 4 add support for color management. The code has been taken from fbdev's offb. I have no hardware available for testing the functionality. Qemu's stdvga apparently does not support gamma tables in RGB modes. I verified that the color management code is executed by running Gnome's night-mode settings, but the display's color tone does not change. Thomas Zimmermann (4): drm/ofdrm: Add ofdrm for Open Firmware framebuffers drm/ofdrm: Add CRTC state drm/ofdrm: Add per-model device function drm/ofdrm: Support color management MAINTAINERS | 1 + drivers/gpu/drm/tiny/Kconfig | 13 + drivers/gpu/drm/tiny/Makefile | 1 + drivers/gpu/drm/tiny/ofdrm.c | 1351 +++++++++++++++++++++++++++++++++ drivers/video/fbdev/Kconfig | 1 + 5 files changed, 1367 insertions(+) create mode 100644 drivers/gpu/drm/tiny/ofdrm.c base-commit: a7d5d07d5ac5ac58ec81932b3f732e3127d17af9