From patchwork Thu Nov 3 15:14:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13030386 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 50EA9C4332F for ; Thu, 3 Nov 2022 15:23:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; 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Thu, 3 Nov 2022 15:14:48 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id oqOUNujaY2PBGgAAMHmgww (envelope-from ); Thu, 03 Nov 2022 15:14:48 +0000 From: Thomas Zimmermann To: daniel@ffwll.ch, airlied@gmail.com, sam@ravnborg.org, javierm@redhat.com, mripard@kernel.org, maarten.lankhorst@linux.intel.com Cc: "linux-hyperv@vger.kernel.orglinux-hyperv"@vger.kernel.org, linux-aspeed@lists.ozlabs.org, nouveau@lists.freedesktop.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, linux-stm32@st-md-mailman.stormreply.com, linux-samsung-soc@vger.kernel.org, amd-gfx@lists.freedesktop.org, linux-rockchip@lists.infradead.org, xen-devel@lists.xenproject.org, linux-sunxi@lists.linux.dev, linux-arm-msm@vger.kernel.org, intel-gfx@lists.freedesktop.org, etnaviv@lists.freedesktop.org, linux-mediatek@lists.infradead.org, spice-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-renesas-soc@vger.kernel.org, freedreno@lists.freedesktop.org, Thomas Zimmermann Subject: [PATCH v3 00/23] drm/fb-helper: Untangle fbdev emulation and helpers Date: Thu, 3 Nov 2022 16:14:23 +0100 Message-Id: <20221103151446.2638-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.38.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221103_081505_901231_B0C07CFF X-CRM114-Status: GOOD ( 16.15 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Separate generic fbdev emulation from the helper code that is shared among the various fbdev implementations within DRM. Affects many drivers. It has become apparent that our fully generic fbdev emulation will never produce optimal results for all drivers. In its current form, it is also hard to maintain. The goal of this patchset is to improve readability and streamline the fbdev helper code within DRM. In the long term, we want to get to a point where drivers or memory managers can pick and combine the various helpers for optimal fbdev support. Patches 1 to 8 start by preparing drivers. Setting struct drm_driver's lastclose and output_poll_changed is not required by generic fbdev emulation. Two drivers depend on fb helpers implicitly including other Linux header files. Fixing this in patches 9 and 10 allows to remove unnecesary include statements from the fb-helper header in patch 11. Do some renaming in patches 12 to 14. There are currently various implementation of the fbdev I/O helpers with varying feature sets. The fb helpers for fbdev I/O should all call fb_sync, which is what fbdev's internal implementation does. For DRM, damage handling needs to be performed after updating a framebuffer. The damage worker is part of the fb helpers, but the actual update logic only works with generic fbdev emulation. Separate the two, which also gives other drivers an option to set their own damage handling if neccessary. The full-featured I/O helpers can be moved under a shared implementation and called by all drivers. Patches 15 to 18 resolve these issues. Patch 19 changes fbdev disablement to work at the level of display detection. If disabled, generic fbdev emulation will be initialized, but no display will be detected. It can later be enabled by changing the parameter in sysfs and plugging in a connector. Patches 20 to 22 move the generic fbdev emulation into their own source and header files and clean up the include statements throughout DRM. Many drivers only call drm_fbdev_generic_setup() and can avoid including other Linux header files. Patch 23 is a documentation update. Built on x86-64, aarch64, arm, ppc64le. Tested with various combinations of bochs, i915, simpledrm. v3: * documentation fixes (Javier) * rename drm_fbdev.{c,h} to drm_fbdev_generic.{c,h} * keep drm_leak_fbdev_smem in drm_fb_helper.c * fix several include statements * rebases v2: * fixed commit descriptions (Christian, Sergey) Thomas Zimmermann (23): drm/komeda: Don't set struct drm_driver.lastclose drm/mcde: Don't set struct drm_driver.lastclose drm/vboxvideo: Don't set struct drm_driver.lastclose drm/amdgpu: Don't set struct drm_driver.output_poll_changed drm/imx/dcss: Don't set struct drm_driver.output_poll_changed drm/ingenic: Don't set struct drm_driver.output_poll_changed drm/logicvc: Don't set struct drm_driver.output_poll_changed drm/rockchip: Don't set struct drm_driver.output_poll_changed drm/panel-ili9341: Include drm/tve200: Include drm/fb-helper: Cleanup include statements in header file drm/fb_helper: Rename field fbdev to info in struct drm_fb_helper drm/fb-helper: Rename drm_fb_helper_alloc_fbi() to use _info postfix drm/fb-helper: Rename drm_fb_helper_unregister_fbi() to use _info postfix drm/fb-helper: Disconnect damage worker from update logic drm/fb-helper: Call fb_sync in I/O functions drm/fb-helper: Perform all fbdev I/O with the same implementation drm/fb_helper: Minimize damage-helper overhead drm/fb-helper: Always initialize generic fbdev emulation drm/fb-helper: Set flag in struct drm_fb_helper for leaking physical addresses drm/fb-helper: Move generic fbdev emulation into separate source file drm/fb-helper: Remove unnecessary include statements drm/fb-helper: Clarify use of last_close and output_poll_changed drivers/gpu/drm/Makefile | 4 +- .../gpu/drm/amd/amdgpu/amdgpu_connectors.c | 1 - drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 3 +- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 1 - drivers/gpu/drm/amd/amdgpu/dce_v10_0.c | 1 + drivers/gpu/drm/amd/amdgpu/dce_v11_0.c | 1 + drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 1 + drivers/gpu/drm/amd/amdgpu/dce_v8_0.c | 1 + .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 - .../gpu/drm/arm/display/komeda/komeda_drv.c | 2 +- .../gpu/drm/arm/display/komeda/komeda_kms.c | 2 - drivers/gpu/drm/arm/hdlcd_crtc.c | 1 - drivers/gpu/drm/arm/hdlcd_drv.c | 2 +- drivers/gpu/drm/arm/malidp_drv.c | 2 +- drivers/gpu/drm/armada/armada_fbdev.c | 6 +- drivers/gpu/drm/aspeed/aspeed_gfx_drv.c | 2 +- drivers/gpu/drm/ast/ast_drv.c | 1 + drivers/gpu/drm/ast/ast_drv.h | 1 - drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 2 +- drivers/gpu/drm/bridge/tc358762.c | 2 +- drivers/gpu/drm/drm_crtc_helper.c | 1 - drivers/gpu/drm/drm_fb_helper.c | 1008 ++++++----------- drivers/gpu/drm/drm_fbdev_generic.c | 493 ++++++++ drivers/gpu/drm/drm_gem_framebuffer_helper.c | 1 - drivers/gpu/drm/drm_probe_helper.c | 1 - drivers/gpu/drm/etnaviv/etnaviv_drv.h | 3 +- drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 6 +- drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 2 +- drivers/gpu/drm/gma500/framebuffer.c | 6 +- drivers/gpu/drm/gud/gud_drv.c | 2 +- .../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 1 + .../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h | 1 - .../gpu/drm/hisilicon/kirin/kirin_drm_drv.c | 2 +- drivers/gpu/drm/hyperv/hyperv_drm_drv.c | 2 +- drivers/gpu/drm/hyperv/hyperv_drm_modeset.c | 1 - drivers/gpu/drm/i915/display/intel_fbdev.c | 8 +- drivers/gpu/drm/imx/dcss/dcss-kms.c | 3 +- drivers/gpu/drm/imx/imx-drm-core.c | 2 +- drivers/gpu/drm/imx/imx-ldb.c | 2 +- drivers/gpu/drm/imx/imx-tve.c | 1 - drivers/gpu/drm/imx/parallel-display.c | 2 +- drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 3 +- drivers/gpu/drm/kmb/kmb_drv.c | 2 +- drivers/gpu/drm/kmb/kmb_plane.c | 1 - drivers/gpu/drm/logicvc/logicvc_drm.c | 2 +- drivers/gpu/drm/logicvc/logicvc_mode.c | 2 - drivers/gpu/drm/mcde/mcde_drv.c | 3 +- drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +- drivers/gpu/drm/meson/meson_drv.c | 2 +- drivers/gpu/drm/mgag200/mgag200_drv.c | 1 + drivers/gpu/drm/mgag200/mgag200_drv.h | 1 - drivers/gpu/drm/msm/msm_fbdev.c | 4 +- drivers/gpu/drm/mxsfb/lcdif_drv.c | 2 +- drivers/gpu/drm/mxsfb/mxsfb_drv.c | 2 +- drivers/gpu/drm/nouveau/nouveau_fbcon.c | 27 +- drivers/gpu/drm/omapdrm/omap_fbdev.c | 6 +- drivers/gpu/drm/panel/panel-ilitek-ili9341.c | 3 +- drivers/gpu/drm/pl111/pl111_drv.c | 2 +- drivers/gpu/drm/qxl/qxl_drv.c | 1 + drivers/gpu/drm/qxl/qxl_drv.h | 1 - drivers/gpu/drm/radeon/radeon_fb.c | 6 +- drivers/gpu/drm/rcar-du/rcar_du_drv.c | 2 +- drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 2 +- drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 2 +- drivers/gpu/drm/rockchip/rockchip_drm_fb.c | 2 - drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 1 + drivers/gpu/drm/solomon/ssd130x.c | 2 +- drivers/gpu/drm/sti/sti_drv.c | 2 +- drivers/gpu/drm/stm/drv.c | 2 +- drivers/gpu/drm/sun4i/sun4i_drv.c | 2 +- drivers/gpu/drm/tegra/fb.c | 8 +- drivers/gpu/drm/tidss/tidss_drv.c | 2 +- drivers/gpu/drm/tidss/tidss_kms.c | 1 - drivers/gpu/drm/tilcdc/tilcdc_drv.c | 2 +- drivers/gpu/drm/tiny/arcpgu.c | 2 +- drivers/gpu/drm/tiny/bochs.c | 2 +- drivers/gpu/drm/tiny/cirrus.c | 2 +- drivers/gpu/drm/tiny/gm12u320.c | 2 +- drivers/gpu/drm/tiny/hx8357d.c | 2 +- drivers/gpu/drm/tiny/ili9163.c | 2 +- drivers/gpu/drm/tiny/ili9225.c | 2 +- drivers/gpu/drm/tiny/ili9341.c | 2 +- drivers/gpu/drm/tiny/ili9486.c | 2 +- drivers/gpu/drm/tiny/mi0283qt.c | 2 +- drivers/gpu/drm/tiny/ofdrm.c | 2 +- drivers/gpu/drm/tiny/panel-mipi-dbi.c | 2 +- drivers/gpu/drm/tiny/repaper.c | 2 +- drivers/gpu/drm/tiny/simpledrm.c | 2 +- drivers/gpu/drm/tiny/st7586.c | 2 +- drivers/gpu/drm/tiny/st7735r.c | 2 +- drivers/gpu/drm/tve200/tve200_drv.c | 3 +- drivers/gpu/drm/udl/udl_drv.c | 2 +- drivers/gpu/drm/v3d/v3d_drv.c | 1 - drivers/gpu/drm/vboxvideo/vbox_drv.c | 4 +- drivers/gpu/drm/vboxvideo/vbox_main.c | 1 - drivers/gpu/drm/vc4/vc4_drv.c | 2 +- drivers/gpu/drm/virtio/virtgpu_drv.c | 1 + drivers/gpu/drm/virtio/virtgpu_drv.h | 1 - drivers/gpu/drm/vkms/vkms_drv.c | 2 +- drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 2 +- drivers/gpu/drm/xen/xen_drm_front_gem.c | 1 - drivers/gpu/drm/xlnx/zynqmp_kms.c | 2 +- include/drm/drm_fb_helper.h | 61 +- include/drm/drm_fbdev_generic.h | 15 + 107 files changed, 987 insertions(+), 835 deletions(-) create mode 100644 drivers/gpu/drm/drm_fbdev_generic.c create mode 100644 include/drm/drm_fbdev_generic.h base-commit: f5a9fb2d688dfc6efa1fd779a2d225048bfb10f9 prerequisite-patch-id: c2b2f08f0eccc9f5df0c0da49fa1d36267deb11d prerequisite-patch-id: c67e5d886a47b7d0266d81100837557fda34cb24 prerequisite-patch-id: 3f204510fcbf9530d6540bd8e6128cce598988b6 prerequisite-patch-id: db1c43fc253bf3b55cfa09128a2d83d960599ead prerequisite-patch-id: 007fca7c89f5fe0e5279021fcac49fb621bf5708