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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 12A24C4332F for ; Wed, 10 Nov 2021 10:37:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F0003610A8 for ; Wed, 10 Nov 2021 10:37:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230455AbhKJKjy (ORCPT ); Wed, 10 Nov 2021 05:39:54 -0500 Received: from smtp-out2.suse.de ([195.135.220.29]:38360 "EHLO smtp-out2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230440AbhKJKjw (ORCPT ); Wed, 10 Nov 2021 05:39:52 -0500 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-out2.suse.de (Postfix) with ESMTPS id C8ABF1FD6B; Wed, 10 Nov 2021 10:37:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1636540623; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=53iJmWfdXRk2SFeTBr6pDPBHF4ZYIRGQ6uPrSskM9pQ=; b=BiDkAHP+MhMn65qKtJSuWalHrxUYX4aSftVEApEAxTGMlS3MoQPGBAETL3B122gJ59GGbA VCamWDFYZY5fTNXZuri/M/P+Ywex4IVPHchwXGs79Ix9AAG0DYqatDIG3GYw5viXTkFkgy P3g1wd98hHiCW1hfT5r47Y2XcLyVo68= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1636540623; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=53iJmWfdXRk2SFeTBr6pDPBHF4ZYIRGQ6uPrSskM9pQ=; b=a8nItKPaeOfxUVuJMoPTcS66TNDiNRsfHA2gWlarEflxJCGCSSWEUPl7kLFY99S9GnPVSC QhB71tKH7q1MbmBA== 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 55CD313BEA; Wed, 10 Nov 2021 10:37:03 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id TT7xE8+gi2EnPAAAMHmgww (envelope-from ); Wed, 10 Nov 2021 10:37:03 +0000 From: Thomas Zimmermann To: daniel@ffwll.ch, airlied@linux.ie, mripard@kernel.org, maarten.lankhorst@linux.intel.com, noralf@tronnes.org, drawat.floss@gmail.com, airlied@redhat.com, kraxel@redhat.com, david@lechnology.com, sam@ravnborg.org, javierm@redhat.com, kernel@amanoeldawod.com, dirty.ice.hu@gmail.com, michael+lkml@stapelberg.ch, aros@gmx.com, joshua@stroblindustries.com, arnd@arndb.de Cc: dri-devel@lists.freedesktop.org, linux-hyperv@vger.kernel.org, virtualization@lists.linux-foundation.org, Thomas Zimmermann Subject: [PATCH v3 0/9] drm/simpledrm: Enable damage clips and virtual screens Date: Wed, 10 Nov 2021 11:36:53 +0100 Message-Id: <20211110103702.374-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.33.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org Enable FB_DAMAGE_CLIPS with simpledrm for improved performance and/or less overhead. With this in place, add support for virtual screens (i.e., framebuffers that are larger than the display resolution). This also enables fbdev panning and page flipping. After the discussion and bug fixing wrt to fbdev overallocation, I decided to add full support for this to simpledrm. Patches #1 to #5 change the format-helper functions accordingly. Destination buffers are now clipped by the caller and all functions support a similar feature set. This has some fallout in various drivers. Patch #6 change fbdev emulation to support overallocation with shadow buffers, even if the hardware buffer would be too small. Patch #7 and #8 update simpledrm to enable damage clipping and virtual screen sizes. Both features go hand in hand, sort of. For shadow- buffered planes, the DRM framebuffer lives in system memory. So the maximum size of the virtual screen is somewhat arbitrary. We add two constants for resonable maximum width and height of 4096 each. Patch #9 adds documentation and a TODO item. Tested with simpledrm. I also ran the recently posted fbdev panning tests to make sure that the fbdev overallocation works correctly. [1] v3: * remove unnecessary clipping in simpledrm (Noralf) * fix drm_dev_enter() usage (Noralf) * style changes (Noralf) v2: * add missing docs (Sam) * return unsigned int from drm_fb_clip_offset() (Sam, Noralf) * fix OOB access in drm_fb_xrgb8888_to_gray8() (Noralf) [1] https://lists.freedesktop.org/archives/igt-dev/2021-October/036642.html Thomas Zimmermann (9): drm/format-helper: Export drm_fb_clip_offset() drm/format-helper: Rework format-helper memcpy functions drm/format-helper: Add destination-buffer pitch to drm_fb_swab() drm/format-helper: Rework format-helper conversion functions drm/format-helper: Streamline blit-helper interface drm/fb-helper: Allocate shadow buffer of surface height drm/simpledrm: Enable FB_DAMAGE_CLIPS property drm/simpledrm: Support virtual screen sizes drm: Clarify semantics of struct drm_mode_config.{min,max}_{width,height} Documentation/gpu/todo.rst | 15 ++ drivers/gpu/drm/drm_fb_helper.c | 2 +- drivers/gpu/drm/drm_format_helper.c | 247 ++++++++++---------- drivers/gpu/drm/drm_mipi_dbi.c | 6 +- drivers/gpu/drm/gud/gud_pipe.c | 14 +- drivers/gpu/drm/hyperv/hyperv_drm_modeset.c | 5 +- drivers/gpu/drm/mgag200/mgag200_mode.c | 4 +- drivers/gpu/drm/tiny/cirrus.c | 24 +- drivers/gpu/drm/tiny/repaper.c | 2 +- drivers/gpu/drm/tiny/simpledrm.c | 37 ++- drivers/gpu/drm/tiny/st7586.c | 2 +- include/drm/drm_format_helper.h | 58 ++--- include/drm/drm_gem_atomic_helper.h | 18 ++ include/drm/drm_mode_config.h | 13 ++ 14 files changed, 260 insertions(+), 187 deletions(-) base-commit: 215295e7b0a3deb2015c6d6b343b319e4f6d9a1d prerequisite-patch-id: c2b2f08f0eccc9f5df0c0da49fa1d36267deb11d prerequisite-patch-id: c67e5d886a47b7d0266d81100837557fda34cb24 -- 2.33.1