From patchwork Wed Jul 14 10:11:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Enric Balletbo i Serra X-Patchwork-Id: 12376569 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=-11.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED,USER_AGENT_GIT 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 59922C07E9A for ; Wed, 14 Jul 2021 10:11:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 36EE96101D for ; Wed, 14 Jul 2021 10:11:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238728AbhGNKOn (ORCPT ); Wed, 14 Jul 2021 06:14:43 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:50660 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238359AbhGNKOn (ORCPT ); Wed, 14 Jul 2021 06:14:43 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: eballetbo) with ESMTPSA id 23F721F42DB7 From: Enric Balletbo i Serra To: linux-kernel@vger.kernel.org Cc: chunkuang.hu@kernel.org, hsinyi@chromium.org, kernel@collabora.com, drinkcat@chromium.org, eizan@chromium.org, linux-mediatek@lists.infradead.org, matthias.bgg@gmail.com, jitao.shi@mediatek.com, Crystal Guo , Daniel Vetter , David Airlie , Fabien Parent , Guenter Roeck , Philipp Zabel , Rob Herring , Wim Van Sebroeck , devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-watchdog@vger.kernel.org Subject: [PATCH v2 0/7] Add support to the mmsys driver to be a reset controller Date: Wed, 14 Jul 2021 12:11:34 +0200 Message-Id: <20210714101141.2089082-1-enric.balletbo@collabora.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Dear all, The following patchset is a reimplementation of the patch sent by Jitao Shi [1] some time ago. As suggested by Chun-Kuang Hu, this time the reset is done using the reset API, where the mmsys driver is the reset controller and the mtk_dsi driver is the reset consumer. Note that the first patch is kind of unrelated change, it's just a cleanup but is needed if you want to apply all the following patches cleanly. This patchset is important in order to have the DSI panel working on some kukui MT8183 Chromebooks (i.e Lenovo IdeaPad Duet). Without it, you just get a black screen. Best regards, Enric [1] https://lore.kernel.org/linux-arm-kernel/20210420132614.150242-4-jitao.shi@mediatek.com/ Changes in v2: - Fix build test ERROR Reported-by: kernel test robot - Added a new patch to describe the dsi reset optional property. Enric Balletbo i Serra (7): arm64: dts: mediatek: Move reset controller constants into common location dt-bindings: mediatek: Add #reset-cells to mmsys system controller dt-bindings: display: mediatek: add dsi reset optional property arm64: dts: mt8173: Add the mmsys reset bit to reset the dsi0 arm64: dts: mt8183: Add the mmsys reset bit to reset the dsi0 soc: mediatek: mmsys: Add reset controller support drm/mediatek: mtk_dsi: Reset the dsi0 hardware .../bindings/arm/mediatek/mediatek,mmsys.txt | 2 + .../display/mediatek/mediatek,dsi.txt | 6 ++ arch/arm64/boot/dts/mediatek/mt8173.dtsi | 2 + arch/arm64/boot/dts/mediatek/mt8183.dtsi | 5 +- drivers/gpu/drm/mediatek/mtk_dsi.c | 5 +- drivers/soc/mediatek/mtk-mmsys.c | 69 +++++++++++++++++++ drivers/soc/mediatek/mtk-mmsys.h | 2 + drivers/watchdog/mtk_wdt.c | 6 +- .../mt2712-resets.h | 0 include/dt-bindings/reset/mt8173-resets.h | 2 + .../mt8183-resets.h | 3 + .../mt8192-resets.h | 0 12 files changed, 96 insertions(+), 6 deletions(-) rename include/dt-bindings/{reset-controller => reset}/mt2712-resets.h (100%) rename include/dt-bindings/{reset-controller => reset}/mt8183-resets.h (98%) rename include/dt-bindings/{reset-controller => reset}/mt8192-resets.h (100%)