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=-2.3 required=3.0 tests=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 88BB0C10DCE for ; Fri, 6 Mar 2020 15:19:08 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 657E22073D for ; Fri, 6 Mar 2020 15:19:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 657E22073D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CC74B6E466; Fri, 6 Mar 2020 15:19:07 +0000 (UTC) Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id 37B6F6E466 for ; Fri, 6 Mar 2020 15:19:06 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 7BF3BAF55; Fri, 6 Mar 2020 15:19:03 +0000 (UTC) Subject: Re: [PATCH 00/22] drm: Convert drivers to drm_simple_encoder_init() To: Laurent Pinchart References: <20200305155950.2705-1-tzimmermann@suse.de> <20200306142212.GF4878@pendragon.ideasonboard.com> From: Thomas Zimmermann Autocrypt: addr=tzimmermann@suse.de; keydata= mQENBFs50uABCADEHPidWt974CaxBVbrIBwqcq/WURinJ3+2WlIrKWspiP83vfZKaXhFYsdg XH47fDVbPPj+d6tQrw5lPQCyqjwrCPYnq3WlIBnGPJ4/jreTL6V+qfKRDlGLWFjZcsrPJGE0 BeB5BbqP5erN1qylK9i3gPoQjXGhpBpQYwRrEyQyjuvk+Ev0K1Jc5tVDeJAuau3TGNgah4Yc hdHm3bkPjz9EErV85RwvImQ1dptvx6s7xzwXTgGAsaYZsL8WCwDaTuqFa1d1jjlaxg6+tZsB 9GluwvIhSezPgnEmimZDkGnZRRSFiGP8yjqTjjWuf0bSj5rUnTGiyLyRZRNGcXmu6hjlABEB AAG0J1Rob21hcyBaaW1tZXJtYW5uIDx0emltbWVybWFubkBzdXNlLmRlPokBVAQTAQgAPhYh BHIX+6yM6c9jRKFo5WgNwR1TC3ojBQJbOdLgAhsDBQkDwmcABQsJCAcCBhUKCQgLAgQWAgMB Ah4BAheAAAoJEGgNwR1TC3ojR80H/jH+vYavwQ+TvO8ksXL9JQWc3IFSiGpuSVXLCdg62AmR irxW+qCwNncNQyb9rd30gzdectSkPWL3KSqEResBe24IbA5/jSkPweJasgXtfhuyoeCJ6PXo clQQGKIoFIAEv1s8l0ggPZswvCinegl1diyJXUXmdEJRTWYAtxn/atut1o6Giv6D2qmYbXN7 mneMC5MzlLaJKUtoH7U/IjVw1sx2qtxAZGKVm4RZxPnMCp9E1MAr5t4dP5gJCIiqsdrVqI6i KupZstMxstPU//azmz7ZWWxT0JzgJqZSvPYx/SATeexTYBP47YFyri4jnsty2ErS91E6H8os Bv6pnSn7eAq5AQ0EWznS4AEIAMYmP4M/V+T5RY5at/g7rUdNsLhWv1APYrh9RQefODYHrNRH UE9eosYbT6XMryR9hT8XlGOYRwKWwiQBoWSDiTMo/Xi29jUnn4BXfI2px2DTXwc22LKtLAgT RjP+qbU63Y0xnQN29UGDbYgyyK51DW3H0If2a3JNsheAAK+Xc9baj0LGIc8T9uiEWHBnCH+R dhgATnWWGKdDegUR5BkDfDg5O/FISymJBHx2Dyoklv5g4BzkgqTqwmaYzsl8UxZKvbaxq0zb ehDda8lvhFXodNFMAgTLJlLuDYOGLK2AwbrS3Sp0AEbkpdJBb44qVlGm5bApZouHeJ/+n+7r 12+lqdsAEQEAAYkBPAQYAQgAJhYhBHIX+6yM6c9jRKFo5WgNwR1TC3ojBQJbOdLgAhsMBQkD wmcAAAoJEGgNwR1TC3ojpfcIAInwP5OlcEKokTnHCiDTz4Ony4GnHRP2fXATQZCKxmu4AJY2 h9ifw9Nf2TjCZ6AMvC3thAN0rFDj55N9l4s1CpaDo4J+0fkrHuyNacnT206CeJV1E7NYntxU n+LSiRrOdywn6erjxRi9EYTVLCHcDhBEjKmFZfg4AM4GZMWX1lg0+eHbd5oL1as28WvvI/uI aMyV8RbyXot1r/8QLlWldU3NrTF5p7TMU2y3ZH2mf5suSKHAMtbE4jKJ8ZHFOo3GhLgjVrBW HE9JXO08xKkgD+w6v83+nomsEuf6C6LYrqY/tsZvyEX6zN8CtirPdPWu/VXNRYAl/lat7lSI 3H26qrE= Message-ID: Date: Fri, 6 Mar 2020 16:18:52 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200306142212.GF4878@pendragon.ideasonboard.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: hamohammed.sa@gmail.com, alexandre.belloni@bootlin.com, airlied@linux.ie, dri-devel@lists.freedesktop.org, sebastian.reichel@collabora.com, paul@crapouillou.net, matthias.bgg@gmail.com, wens@csie.org, thierry.reding@gmail.com, kraxel@redhat.com, sam@ravnborg.org, linux-samsung-soc@vger.kernel.org, jy0922.shim@samsung.com, linux-rockchip@lists.infradead.org, tomi.valkeinen@ti.com, abrodkin@synopsys.com, linux@armlinux.org.uk, krzk@kernel.org, jonathanh@nvidia.com, xinliang.liu@linaro.org, kong.kongxinwei@hisilicon.com, kgene@kernel.org, linux-imx@nxp.com, nicolas.ferre@microchip.com, puck.chen@hisilicon.com, s.hauer@pengutronix.de, alison.wang@nxp.com, jsarha@ti.com, linux-mediatek@lists.infradead.org, linux-tegra@vger.kernel.org, virtualization@lists.linux-foundation.org, jernej.skrabec@siol.net, rodrigosiqueiramelo@gmail.com, bbrezillon@kernel.org, jingoohan1@gmail.com, sw0312.kim@samsung.com, hjc@rock-chips.com, kyungmin.park@samsung.com, kieran.bingham+renesas@ideasonboard.com, ludovic.desroches@microchip.com, kernel@pengutronix.de, zourongrong@gmail.com, shawnguo@kernel.org Content-Type: multipart/mixed; boundary="===============0108171417==" Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============0108171417== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="zLjI9bAGFBvHKwEMe397vRdtLj3HUCSWe" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --zLjI9bAGFBvHKwEMe397vRdtLj3HUCSWe Content-Type: multipart/mixed; boundary="7ZEUhC7vXaHUKdhpsAsTVaSFl7q2PnfOJ"; protected-headers="v1" From: Thomas Zimmermann To: Laurent Pinchart Cc: hamohammed.sa@gmail.com, alexandre.belloni@bootlin.com, airlied@linux.ie, linux@armlinux.org.uk, paul@crapouillou.net, thierry.reding@gmail.com, krzk@kernel.org, sam@ravnborg.org, sebastian.reichel@collabora.com, linux-samsung-soc@vger.kernel.org, jy0922.shim@samsung.com, hjc@rock-chips.com, abrodkin@synopsys.com, kong.kongxinwei@hisilicon.com, jonathanh@nvidia.com, xinliang.liu@linaro.org, ludovic.desroches@microchip.com, kgene@kernel.org, linux-imx@nxp.com, linux-rockchip@lists.infradead.org, virtualization@lists.linux-foundation.org, linux-tegra@vger.kernel.org, puck.chen@hisilicon.com, s.hauer@pengutronix.de, alison.wang@nxp.com, jsarha@ti.com, matthias.bgg@gmail.com, wens@csie.org, kernel@pengutronix.de, jernej.skrabec@siol.net, rodrigosiqueiramelo@gmail.com, tomi.valkeinen@ti.com, bbrezillon@kernel.org, jingoohan1@gmail.com, dri-devel@lists.freedesktop.org, sw0312.kim@samsung.com, nicolas.ferre@microchip.com, kyungmin.park@samsung.com, kieran.bingham+renesas@ideasonboard.com, zourongrong@gmail.com, linux-mediatek@lists.infradead.org, shawnguo@kernel.org, kraxel@redhat.com Message-ID: Subject: Re: [PATCH 00/22] drm: Convert drivers to drm_simple_encoder_init() References: <20200305155950.2705-1-tzimmermann@suse.de> <20200306142212.GF4878@pendragon.ideasonboard.com> In-Reply-To: <20200306142212.GF4878@pendragon.ideasonboard.com> --7ZEUhC7vXaHUKdhpsAsTVaSFl7q2PnfOJ Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable Hi Laurent Am 06.03.20 um 15:22 schrieb Laurent Pinchart: > Hi Thomas, >=20 > Thank you for the patch. >=20 > 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. >=20 > 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. >=20 > Reviewed-by: Laurent Pinchart Thanks for the detailed review. >=20 > for all the patches. >=20 > 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. True. It's called 'simple encoder' for the lack of a better name. It's part of the simple KMS helpers, so the name's at least consistent. OTOH I always find drm_simple_display_pipe a bad name. We can still rename the simple-encoder function without much effort. I'm open for suggestions. Best regards Thomas >=20 >> 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. >=20 > 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. >=20 >> 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(-) >=20 --=20 Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 N=C3=BCrnberg, Germany (HRB 36809, AG N=C3=BCrnberg) Gesch=C3=A4ftsf=C3=BChrer: Felix Imend=C3=B6rffer --7ZEUhC7vXaHUKdhpsAsTVaSFl7q2PnfOJ-- --zLjI9bAGFBvHKwEMe397vRdtLj3HUCSWe Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEchf7rIzpz2NEoWjlaA3BHVMLeiMFAl5iadwACgkQaA3BHVML eiO0kQf+MIM+f6/DNKocn671bllssFCEGKWrX1wgTabB1iiRSL7ARnr03xMcYvzP Ik/PoetXfawz8fIw2Xm6VeEHT6+62AY3l/GmWWi0BlHNfpAvSwLnmgBT95Rkqxhl fVnkuw/R9c25A/WZMABTJ05EJhytBN4Iu42F+J6x2Jy+SpBNNETqwpvVPYL45Ou9 4QUL5Rj+xtwAzce+WOLqcL+LQmYDDrLlwOIS884Xfi4B6o8aSh9L2m2SJPCR1U6n mdKcRZk/ztKJrkm/udvjRymVO/VT/ai9N4v6KNJ+dI6ko2jJZHrEpMDYdyGR840X Y2HKoexIUwvdHV/Qy7ihnx7889lJNQ== =LTju -----END PGP SIGNATURE----- --zLjI9bAGFBvHKwEMe397vRdtLj3HUCSWe-- --===============0108171417== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel --===============0108171417==--