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[23.128.96.18]) by mx.google.com with ESMTP id dk5si6701661edb.116.2020.07.18.04.05.45; Sat, 18 Jul 2020 04:06:08 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726780AbgGRLFa (ORCPT + 99 others); Sat, 18 Jul 2020 07:05:30 -0400 Received: from honk.sigxcpu.org ([24.134.29.49]:39908 "EHLO honk.sigxcpu.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726507AbgGRLFa (ORCPT ); Sat, 18 Jul 2020 07:05:30 -0400 Received: from localhost (localhost [127.0.0.1]) by honk.sigxcpu.org (Postfix) with ESMTP id 7F632FB03; Sat, 18 Jul 2020 13:05:27 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at honk.sigxcpu.org Received: from honk.sigxcpu.org ([127.0.0.1]) by localhost (honk.sigxcpu.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id zmh5EomUl9RE; Sat, 18 Jul 2020 13:05:26 +0200 (CEST) Received: by bogon.sigxcpu.org (Postfix, from userid 1000) id B06E842576; Sat, 18 Jul 2020 13:05:25 +0200 (CEST) Date: Sat, 18 Jul 2020 13:05:25 +0200 From: Guido =?iso-8859-1?Q?G=FCnther?= To: Sam Ravnborg Cc: Laurentiu Palcu , Philipp Zabel , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Lucas Stach , lukas@mntmn.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v6 2/4] drm/imx: Add initial support for DCSS on iMX8MQ Message-ID: <20200718110525.GA2827@bogon.m.sigxcpu.org> References: <20200717144132.2206-1-laurentiu.palcu@oss.nxp.com> <20200717144132.2206-3-laurentiu.palcu@oss.nxp.com> <20200717194849.GA2369507@ravnborg.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200717194849.GA2369507@ravnborg.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Fri, Jul 17, 2020 at 09:48:49PM +0200, Sam Ravnborg wrote: > Hi Laurentiu. > > On Fri, Jul 17, 2020 at 05:41:27PM +0300, Laurentiu Palcu wrote: > > From: Laurentiu Palcu > > > > This adds initial support for iMX8MQ's Display Controller Subsystem (DCSS). > > Some of its capabilities include: > > * 4K@60fps; > > * HDR10; > > * one graphics and 2 video pipelines; > > * on-the-fly decompression of compressed video and graphics; > > > > The reference manual can be found here: > > https://www.nxp.com/webapp/Download?colCode=IMX8MDQLQRM > > > > The current patch adds only basic functionality: one primary plane for > > graphics, linear, tiled and super-tiled buffers support (no graphics > > decompression yet), no HDR10 and no video planes. > > > > Video planes support and HDR10 will be added in subsequent patches once > > per-plane de-gamma/CSC/gamma support is in. > > > > Signed-off-by: Laurentiu Palcu > > Reviewed-by: Lucas Stach > > --- > > .... > return drm_bridge_attach(encoder, bridge, NULL, 0); > .... > > The above code-snippet tells that the display-driver rely on the bridge > to create the connector. > Could this by any chance be updated to the new way where the display > driver creates the connector - and thus passing DRM_BRIDGE_ATTACH_NO_CONNECTOR > as the flags argument? > > What bridges would be relevant? > To check that the reelvant bridges are already ported. I think that's mostly NWL atm since MHDP isn't mainline yet. Can you recommend a bridge driver to look at that does this right? Cheers, -- Guido