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=-5.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY autolearn=ham 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 C87D1C432C3 for ; Sun, 24 Nov 2019 00:46:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9F9BD20714 for ; Sun, 24 Nov 2019 00:46:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726690AbfKXAq6 (ORCPT ); Sat, 23 Nov 2019 19:46:58 -0500 Received: from bhuna.collabora.co.uk ([46.235.227.227]:59448 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726676AbfKXAq6 (ORCPT ); Sat, 23 Nov 2019 19:46:58 -0500 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: ezequiel) with ESMTPSA id EA44728D210 Message-ID: <947ed9253bf501636e035698336c80c8af0743e0.camel@collabora.com> Subject: Re: [PATCH v3 00/21] drm: Add support for bus-format negotiation From: Ezequiel Garcia To: Boris Brezillon , dri-devel@lists.freedesktop.org Cc: Lucas Stach , Chris Healy , Andrey Smirnov , Nikita Yushchenko , kernel@collabora.com, Daniel Vetter , Inki Dae , Joonyoung Shim , Seung-Woo Kim , Kyungmin Park , Thierry Reding , Sam Ravnborg , Philipp Zabel , Rob Clark , Andrzej Hajda , Neil Armstrong , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Rob Herring , Mark Rutland , devicetree@vger.kernel.org Date: Sun, 24 Nov 2019 09:46:41 +0900 In-Reply-To: <20191023154512.9762-1-boris.brezillon@collabora.com> References: <20191023154512.9762-1-boris.brezillon@collabora.com> Organization: Collabora Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.34.1-2 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Hi Boris, Neil, On Wed, 2019-10-23 at 17:44 +0200, Boris Brezillon wrote: > This patch series aims at adding support for runtime bus-format > negotiation between all elements of the > 'encoder -> bridges -> connector/display' section of the pipeline. > > In order to support that, we need drm bridges to fully take part in the > atomic state validation process, which requires adding a > drm_bridge_state and a new drm_bridge_funcs.atomic_check() hook. > Once those basic building blocks are in place, we can add new hooks to > allow bus format negotiation (those are called just before > ->atomic_check()). The bus format selection is done at runtime by > testing all possible combinations across the whole bridge chain until > one is reported to work. > > Major changes since v2: > * Get rid of the dummy bridge embedded in drm_encoder and let encoder > drivers provide their own bridge element > * Clarify APIs and improve the doc > * Propagate bus flags by default > > Major changes since the RFC: > > * Add a dummy bridge to the drm_encoder object so that vc4 and exynos > DSI drivers can implement the pre_enable/post_disable hooks instead > of manually setting encoder->bridge to NULL to control the > enable/disable sequence. This change is also a first step towards > drm_bridge/drm_encoder unification. New encoder drivers should > stop implementing drm_encoder_helper_funcs and switch to > drm_bridge_funcs. Existing drivers can be converted progressively > (already have a branch where I started converting some of them [1]) > * rework the bus format negotiation to give more control to bridge > drivers in the selection process (driver can select at runtime which > input bus format they support for a specific output bus format based > on any information available in the connector, crtc and bridge state. > > A more detailed changelog is provided in each patch. > > This patch series is also available here [2]. > > Thanks, > > Boris > > [1]https://github.com/bbrezillon/linux-0day/commits/drm-encoder-bridge > [2]https://github.com/bbrezillon/linux-0day/commits/drm-bridge-busfmt-v3 > > *** BLURB HERE *** > > Boris Brezillon (21): > drm/vc4: Declare the DSI encoder as a bridge element > drm/exynos: Don't reset bridge->next > drm/exynos: Declare the DSI encoder as a bridge element > drm/bridge: Rename bridge helpers targeting a bridge chain > drm/bridge: Introduce drm_bridge_chain_get_next_bridge() > drm: Stop accessing encoder->bridge directly Patches 1 to 6 seem to be reviewed, and appear as a good step forward. Perhaps we can consider merging these first? That way, we can reduce the patches needed to rebase and submit on each iteration. Regards, Ezequiel From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ezequiel Garcia Subject: Re: [PATCH v3 00/21] drm: Add support for bus-format negotiation Date: Sun, 24 Nov 2019 09:46:41 +0900 Message-ID: <947ed9253bf501636e035698336c80c8af0743e0.camel@collabora.com> References: <20191023154512.9762-1-boris.brezillon@collabora.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by gabe.freedesktop.org (Postfix) with ESMTPS id 77A946E0E8 for ; Sun, 24 Nov 2019 00:46:58 +0000 (UTC) In-Reply-To: <20191023154512.9762-1-boris.brezillon@collabora.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Boris Brezillon , dri-devel@lists.freedesktop.org Cc: Mark Rutland , Neil Armstrong , Thierry Reding , Laurent Pinchart , kernel@collabora.com, Sam Ravnborg , Nikita Yushchenko , Andrey Smirnov , Kyungmin Park , Chris Healy , devicetree@vger.kernel.org, Jonas Karlman , Rob Herring , Jernej Skrabec , Seung-Woo Kim List-Id: dri-devel@lists.freedesktop.org SGkgQm9yaXMsIE5laWwsCgpPbiBXZWQsIDIwMTktMTAtMjMgYXQgMTc6NDQgKzAyMDAsIEJvcmlz IEJyZXppbGxvbiB3cm90ZToKPiBUaGlzIHBhdGNoIHNlcmllcyBhaW1zIGF0IGFkZGluZyBzdXBw b3J0IGZvciBydW50aW1lIGJ1cy1mb3JtYXQKPiBuZWdvdGlhdGlvbiBiZXR3ZWVuIGFsbCBlbGVt ZW50cyBvZiB0aGUKPiAnZW5jb2RlciAtPiBicmlkZ2VzIC0+IGNvbm5lY3Rvci9kaXNwbGF5JyBz ZWN0aW9uIG9mIHRoZSBwaXBlbGluZS4KPiAKPiBJbiBvcmRlciB0byBzdXBwb3J0IHRoYXQsIHdl IG5lZWQgZHJtIGJyaWRnZXMgdG8gZnVsbHkgdGFrZSBwYXJ0IGluIHRoZQo+IGF0b21pYyBzdGF0 ZSB2YWxpZGF0aW9uIHByb2Nlc3MsIHdoaWNoIHJlcXVpcmVzIGFkZGluZyBhCj4gZHJtX2JyaWRn ZV9zdGF0ZSBhbmQgYSBuZXcgZHJtX2JyaWRnZV9mdW5jcy5hdG9taWNfY2hlY2soKSBob29rLgo+ IE9uY2UgdGhvc2UgYmFzaWMgYnVpbGRpbmcgYmxvY2tzIGFyZSBpbiBwbGFjZSwgd2UgY2FuIGFk 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dri-devel@lists.freedesktop.org Date: Sun, 24 Nov 2019 09:46:41 +0900 In-Reply-To: <20191023154512.9762-1-boris.brezillon@collabora.com> References: <20191023154512.9762-1-boris.brezillon@collabora.com> Organization: Collabora User-Agent: Evolution 3.34.1-2 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Neil Armstrong , Thierry Reding , Laurent Pinchart , kernel@collabora.com, Sam Ravnborg , Nikita Yushchenko , Andrey Smirnov , Kyungmin Park , Chris Healy , devicetree@vger.kernel.org, Jonas Karlman , Rob Herring , Jernej Skrabec , Seung-Woo Kim Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Message-ID: <20191124004641.yB7NgUxG2hGbtETEOxwDOV5lXXgHdWeC3RDwYHx3YV4@z> 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