From patchwork Thu Jul 7 15:39:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 588333 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 BB0ACC43334 for ; Thu, 7 Jul 2022 15:40:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235171AbiGGPkB (ORCPT ); Thu, 7 Jul 2022 11:40:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59494 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229926AbiGGPkA (ORCPT ); Thu, 7 Jul 2022 11:40:00 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 85A0BE9A for ; Thu, 7 Jul 2022 08:39:59 -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 31916219F2; Thu, 7 Jul 2022 15:39:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1657208398; 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=4vZ5bqCfIkwqM9philRuQdabqYFiE7l8C2Z/WBk+CRs=; b=XrmZeKlk8nIFeVcnen2WkP1lYO+G3PKWD4+69OoesWQ2uZQK5/+IabAX4M849tzAGewc6W F7/1K196CyzbrZ7koXb+oGjpy8QXiEaMD2grHp0TgHlC+EnssG5WPUx5TBlzkFwjv4QF/3 yBawnDrOuZUmPyVef2xxiwlsAkf4p/E= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1657208398; 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=4vZ5bqCfIkwqM9philRuQdabqYFiE7l8C2Z/WBk+CRs=; b=mOElHapcEpoTN5jeCTInBT6zi/k8X5ON5DK5Cd2LrCUjdyYkFowxp+qjcXONWyyoBuXqc/ H4B/iCu7bmlqySCw== 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 01C5813A33; Thu, 7 Jul 2022 15:39:57 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id sboEO03+xmI9UQAAMHmgww (envelope-from ); Thu, 07 Jul 2022 15:39:57 +0000 From: Thomas Zimmermann To: javierm@redhat.com, deller@gmx.de, daniel@ffwll.ch, sam@ravnborg.org, maxime@cerno.tech Cc: linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, dri-devel@lists.freedesktop.org, Thomas Zimmermann Subject: [PATCH 00/11] fbdev: Maintain device ownership with aperture helpers Date: Thu, 7 Jul 2022 17:39:41 +0200 Message-Id: <20220707153952.32264-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.36.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org Fbdev firmware drivers acquire ownership of framebuffer I/O ranges and hand them over to native drivers during the boot process. Re-implement this mechanism with aperture helpers and remove the respective fbdev code. This change allows to perform hand-over from DRM firmware drivers. In a later patchset, device ownership can be moved from DRM and fbdev entirely into aperture helpers. Patches 1 and 4 are cleanups. Patches 2 and 3 integrate EGA/VGA support into sysfb, although it's not clear if the x86 architecture code actually still supports VGA graphics mode. Patches 5 to 10 replace fbdev's ownership management with aperture helpers. This includes removal of conflicting framebuffer drivers, removal of conflicting VGA drivers and registration of fbdev firmware devices. Notably, many PCI-based fbdev drivers failed to remove firmware devices until now; and therefore probably haven't worked correctly for some time. Patch 11 removes the implementation of fbdev ownership management. The patchset has been tested by handing over device ownership between firmware and native drivers of DRM and fbdev in various combinations. Thomas Zimmermann (11): fbdev: Remove trailing whitespaces fbdev/vga16fb: Create EGA/VGA devices in sysfb code fbdev/vga16fb: Auto-generate module init/exit code fbdev/core: Remove remove_conflicting_pci_framebuffers() fbdev: Convert drivers to aperture helpers fbdev: Remove conflicting devices on PCI bus video/aperture: Disable and unregister sysfb devices via aperture helpers video: Provide constants for VGA I/O range video/aperture: Remove conflicting VGA devices, if any fbdev: Acquire framebuffer apertures for firmware devices fbdev: Remove conflict-handling code drivers/firmware/sysfb.c | 4 + drivers/staging/sm750fb/sm750.c | 15 +- drivers/video/aperture.c | 69 ++-- drivers/video/fbdev/arkfb.c | 5 + drivers/video/fbdev/asiliantfb.c | 5 + drivers/video/fbdev/aty/aty128fb.c | 57 ++-- drivers/video/fbdev/aty/atyfb_base.c | 7 +- drivers/video/fbdev/aty/radeon_base.c | 83 +++-- drivers/video/fbdev/carminefb.c | 5 + drivers/video/fbdev/chipsfb.c | 13 +- drivers/video/fbdev/cirrusfb.c | 5 + drivers/video/fbdev/core/fbmem.c | 176 ++--------- drivers/video/fbdev/cyber2000fb.c | 5 + drivers/video/fbdev/geode/gx1fb_core.c | 5 + drivers/video/fbdev/geode/gxfb_core.c | 5 + drivers/video/fbdev/geode/lxfb_core.c | 5 + drivers/video/fbdev/gxt4500.c | 5 + drivers/video/fbdev/hyperv_fb.c | 6 +- drivers/video/fbdev/i740fb.c | 5 + drivers/video/fbdev/i810/i810_main.c | 315 ++++++++++--------- drivers/video/fbdev/imsttfb.c | 36 ++- drivers/video/fbdev/intelfb/intelfbdrv.c | 5 + drivers/video/fbdev/kyro/fbdev.c | 5 + drivers/video/fbdev/matrox/matroxfb_base.c | 5 + drivers/video/fbdev/mb862xx/mb862xxfbdrv.c | 5 + drivers/video/fbdev/neofb.c | 41 +-- drivers/video/fbdev/nvidia/nvidia.c | 7 +- drivers/video/fbdev/pm2fb.c | 5 + drivers/video/fbdev/pm3fb.c | 5 + drivers/video/fbdev/pvr2fb.c | 5 + drivers/video/fbdev/riva/fbdev.c | 67 ++-- drivers/video/fbdev/s3fb.c | 5 + drivers/video/fbdev/savage/savagefb_driver.c | 5 + drivers/video/fbdev/sis/sis_main.c | 5 + drivers/video/fbdev/skeletonfb.c | 210 +++++++------ drivers/video/fbdev/sm712fb.c | 5 + drivers/video/fbdev/sstfb.c | 43 +-- drivers/video/fbdev/sunxvr2500.c | 5 + drivers/video/fbdev/sunxvr500.c | 5 + drivers/video/fbdev/tdfxfb.c | 5 + drivers/video/fbdev/tgafb.c | 17 +- drivers/video/fbdev/tridentfb.c | 5 + drivers/video/fbdev/vermilion/vermilion.c | 7 +- drivers/video/fbdev/vga16fb.c | 191 +++++------ drivers/video/fbdev/via/via-core.c | 5 + drivers/video/fbdev/vt8623fb.c | 5 + include/linux/fb.h | 4 - include/video/vga.h | 20 +- 48 files changed, 788 insertions(+), 735 deletions(-) base-commit: 11d480026e922adacd274306728adb6df6dd262a prerequisite-patch-id: c2b2f08f0eccc9f5df0c0da49fa1d36267deb11d prerequisite-patch-id: c67e5d886a47b7d0266d81100837557fda34cb24 Reviewed-by: Javier Martinez Canillas Reviewed-by: Javier Martinez Canillas