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 X-Spam-Level: X-Spam-Status: No, score=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 478CCC10DCE for ; Fri, 6 Mar 2020 14:22:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 128A72072D for ; Fri, 6 Mar 2020 14:22:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="Xki5OYRB" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726231AbgCFOWU (ORCPT ); Fri, 6 Mar 2020 09:22:20 -0500 Received: from perceval.ideasonboard.com ([213.167.242.64]:44912 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726090AbgCFOWU (ORCPT ); Fri, 6 Mar 2020 09:22:20 -0500 Received: from pendragon.ideasonboard.com (81-175-216-236.bb.dnainternet.fi [81.175.216.236]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 8EC1F24B; Fri, 6 Mar 2020 15:22:16 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1583504536; bh=MH9YQYcDsr9s2M3IB0rXZTRRm+hDapSlDl0Vs61ST9o=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Xki5OYRB7mD7+l2b1SY8qPQ5tBQGg9BZ76pb0MHjxnVRTK9GNDUDJs6C1g2WW8dR3 nuZArtefruHiDDFHMqRHCaxIFGYV12aKEnYRQVvJ/nnppxJVADd5/NUrEvX3Gckh5T fWcaVMBRXwWzmnFSyR3sLo/6PwauDVpx+Tncd0is= Date: Fri, 6 Mar 2020 16:22:12 +0200 From: Laurent Pinchart To: Thomas Zimmermann Cc: airlied@linux.ie, daniel@ffwll.ch, sam@ravnborg.org, abrodkin@synopsys.com, bbrezillon@kernel.org, nicolas.ferre@microchip.com, alexandre.belloni@bootlin.com, ludovic.desroches@microchip.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, jingoohan1@gmail.com, inki.dae@samsung.com, jy0922.shim@samsung.com, sw0312.kim@samsung.com, kyungmin.park@samsung.com, kgene@kernel.org, krzk@kernel.org, stefan@agner.ch, alison.wang@nxp.com, patrik.r.jakobsson@gmail.com, xinliang.liu@linaro.org, zourongrong@gmail.com, john.stultz@linaro.org, kong.kongxinwei@hisilicon.com, puck.chen@hisilicon.com, linux@armlinux.org.uk, p.zabel@pengutronix.de, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, paul@crapouillou.net, ck.hu@mediatek.com, matthias.bgg@gmail.com, kieran.bingham+renesas@ideasonboard.com, hjc@rock-chips.com, heiko@sntech.de, wens@csie.org, jernej.skrabec@siol.net, thierry.reding@gmail.com, jonathanh@nvidia.com, jsarha@ti.com, tomi.valkeinen@ti.com, eric@anholt.net, kraxel@redhat.com, rodrigosiqueiramelo@gmail.com, hamohammed.sa@gmail.com, sebastian.reichel@collabora.com, dri-devel@lists.freedesktop.org, linux-samsung-soc@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-tegra@vger.kernel.org, virtualization@lists.linux-foundation.org Subject: Re: [PATCH 00/22] drm: Convert drivers to drm_simple_encoder_init() Message-ID: <20200306142212.GF4878@pendragon.ideasonboard.com> References: <20200305155950.2705-1-tzimmermann@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200305155950.2705-1-tzimmermann@suse.de> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Hi Thomas, Thank you for the patch. On Thu, Mar 05, 2020 at 04:59:28PM +0100, Thomas Zimmermann wrote: > A call to drm_simple_encoder_init() initializes an encoder without > further functionality. It only provides the destroy callback to > cleanup the encoder's state. Only few drivers implement more > sophisticated encoders than that. Most drivers implement such a > simple encoder and can use drm_simple_encoder_init() instead. > > The patchset converts drivers where the encoder's instance is > embedded in a larger data structure. The driver releases the > memory during cleanup. Each patch replaces drm_encoder_init() with > drm_simple_encoder_init() and removes the (now unused) driver's > encoder functions. > > While the patchset is fairly large, the indiviual patches are self- > contained and can be merged independently from each other. The > simple-encoder functionality is currently in drm-misc-next, where > these patches could go as well. I've reviewed the whole series, including verifying that the few instances of struct drm_encoder_funcs that were not declared const were not modified somewhere to add more function pointers. Reviewed-by: Laurent Pinchart for all the patches. However, I'd like to note that drm_simple_encoder_init() is a bit of a misnommer here. Several of the encoders in those drivers to implement additional functionality. They just expose them through drm_encoder_helper_funcs, not drm_encoder_funcs. > Future directions: There's another common case where the driver > calls kzalloc() plus drm_encoder_init(). Such drivers are not > handled by this patchset. The plan here is to use a simple encoder > with either managed memory allocation (once it's merged), or embed > the encoder in a larger data structure and drop kzalloc() entirely. I think an even more interesting future enhancement would be to add encoder support to the newly added drm_bridge_connector_init(), for drivers that are fully based on bridges and don't implement any encoder operation, neither through drm_encoder_funcs nor through drm_encoder_helper_funcs. > The patchset has been compile-tested on x86-64, aarch64 and arm. > > Thomas Zimmermann (22): > drm/arc: Use simple encoder > drm/atmel-hlcdc: Use simple encoder > drm/exynos: Use simple encoder > drm/fsl-dcu: Use simple encoder > drm/gma500: Use simple encoder > drm/hisilicon/kirin: Use simple encoder > drm/i2c/tda998x: Use simple encoder > drm/imx: Use simple encoder > drm/ingenic: Use simple encoder > drm/mediatek: Use simple encoder > drm/rcar-du: Use simple encoder > drm/rockchip: Use simple encoder > drm/shmobile: Use simple encoder > drm/sun4i: Use simple encoder > drm/tegra: Use simple encoder > drm/tidss: Use simple encoder > drm/tilcdc: Use simple encoder > drm/vc4: Use simple encoder > drm/virtgpu: Use simple encoder > drm/vkms: Use simple encoder > drm/writeback: Use simple encoder > drm/zte: Use simple encoder > > drivers/gpu/drm/arc/arcpgu_hdmi.c | 10 +++------- > drivers/gpu/drm/arc/arcpgu_sim.c | 8 ++------ > .../gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c | 12 ++++-------- > drivers/gpu/drm/drm_writeback.c | 10 +++------- > drivers/gpu/drm/exynos/exynos_dp.c | 8 ++------ > drivers/gpu/drm/exynos/exynos_drm_dpi.c | 8 ++------ > drivers/gpu/drm/exynos/exynos_drm_dsi.c | 8 ++------ > drivers/gpu/drm/exynos/exynos_drm_vidi.c | 8 ++------ > drivers/gpu/drm/exynos/exynos_hdmi.c | 8 ++------ > drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c | 14 +++----------- > drivers/gpu/drm/gma500/cdv_intel_crt.c | 14 +++----------- > drivers/gpu/drm/gma500/cdv_intel_dp.c | 16 +++------------- > drivers/gpu/drm/gma500/cdv_intel_hdmi.c | 4 ++-- > drivers/gpu/drm/gma500/cdv_intel_lvds.c | 17 +++-------------- > drivers/gpu/drm/gma500/mdfld_dsi_dpi.c | 7 +++---- > drivers/gpu/drm/gma500/mdfld_output.h | 1 - > drivers/gpu/drm/gma500/mdfld_tmd_vid.c | 6 ------ > drivers/gpu/drm/gma500/mdfld_tpo_vid.c | 6 ------ > drivers/gpu/drm/gma500/oaktrail_hdmi.c | 14 ++------------ > drivers/gpu/drm/gma500/oaktrail_lvds.c | 5 +++-- > drivers/gpu/drm/gma500/psb_intel_drv.h | 1 - > drivers/gpu/drm/gma500/psb_intel_lvds.c | 18 +++--------------- > drivers/gpu/drm/gma500/tc35876x-dsi-lvds.c | 5 ----- > drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c | 8 ++------ > drivers/gpu/drm/i2c/tda998x_drv.c | 14 +++----------- > drivers/gpu/drm/imx/dw_hdmi-imx.c | 8 ++------ > drivers/gpu/drm/imx/imx-drm-core.c | 6 ------ > drivers/gpu/drm/imx/imx-drm.h | 1 - > drivers/gpu/drm/imx/imx-ldb.c | 8 ++------ > drivers/gpu/drm/imx/imx-tve.c | 8 ++------ > drivers/gpu/drm/imx/parallel-display.c | 8 ++------ > drivers/gpu/drm/ingenic/ingenic-drm.c | 9 +++------ > drivers/gpu/drm/mediatek/mtk_dpi.c | 14 +++----------- > drivers/gpu/drm/mediatek/mtk_dsi.c | 14 +++----------- > drivers/gpu/drm/rcar-du/rcar_du_encoder.c | 14 +++----------- > .../gpu/drm/rockchip/analogix_dp-rockchip.c | 9 +++------ > drivers/gpu/drm/rockchip/cdn-dp-core.c | 9 +++------ > .../gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 8 ++------ > drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 8 ++------ > drivers/gpu/drm/rockchip/inno_hdmi.c | 8 ++------ > drivers/gpu/drm/rockchip/rk3066_hdmi.c | 8 ++------ > drivers/gpu/drm/rockchip/rockchip_lvds.c | 10 +++------- > drivers/gpu/drm/rockchip/rockchip_rgb.c | 8 ++------ > drivers/gpu/drm/shmobile/shmob_drm_crtc.c | 14 +++----------- > drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c | 12 +++--------- > drivers/gpu/drm/sun4i/sun4i_lvds.c | 12 +++--------- > drivers/gpu/drm/sun4i/sun4i_rgb.c | 17 +++-------------- > drivers/gpu/drm/sun4i/sun4i_tv.c | 17 +++-------------- > drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 12 +++--------- > drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c | 8 ++------ > drivers/gpu/drm/tegra/drm.h | 2 -- > drivers/gpu/drm/tegra/dsi.c | 10 +++------- > drivers/gpu/drm/tegra/hdmi.c | 9 +++------ > drivers/gpu/drm/tegra/output.c | 6 +----- > drivers/gpu/drm/tegra/rgb.c | 8 ++------ > drivers/gpu/drm/tegra/sor.c | 8 ++------ > drivers/gpu/drm/tidss/tidss_encoder.c | 10 +++------- > drivers/gpu/drm/tilcdc/tilcdc_external.c | 10 +++------- > drivers/gpu/drm/tilcdc/tilcdc_panel.c | 8 ++------ > drivers/gpu/drm/vc4/vc4_dpi.c | 8 ++------ > drivers/gpu/drm/vc4/vc4_dsi.c | 15 +++------------ > drivers/gpu/drm/vc4/vc4_hdmi.c | 17 ++++------------- > drivers/gpu/drm/vc4/vc4_vec.c | 8 ++------ > drivers/gpu/drm/virtio/virtgpu_display.c | 8 ++------ > drivers/gpu/drm/vkms/vkms_output.c | 8 ++------ > drivers/gpu/drm/zte/zx_hdmi.c | 8 ++------ > drivers/gpu/drm/zte/zx_tvenc.c | 8 ++------ > drivers/gpu/drm/zte/zx_vga.c | 8 ++------ > 68 files changed, 151 insertions(+), 488 deletions(-) -- Regards, Laurent Pinchart