From patchwork Wed Mar 11 16:53:17 2020 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: 11432243 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 906911515 for ; Wed, 11 Mar 2020 16:54:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4EC1B2074D for ; Wed, 11 Mar 2020 16:54:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730100AbgCKQxe (ORCPT ); Wed, 11 Mar 2020 12:53:34 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:60560 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730019AbgCKQxd (ORCPT ); Wed, 11 Mar 2020 12:53:33 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: eballetbo) with ESMTPSA id 9284D2930CF From: Enric Balletbo i Serra To: robh+dt@kernel.org, mark.rutland@arm.com, ck.hu@mediatek.com, p.zabel@pengutronix.de, airlied@linux.ie, mturquette@baylibre.com, sboyd@kernel.org, ulrich.hecht+renesas@gmail.com, laurent.pinchart@ideasonboard.com Cc: Allison Randal , Matthias Brugger , wens@csie.org, linux-media@vger.kernel.org, sean.wang@mediatek.com, hsinyi@chromium.org, rdunlap@infradead.org, Greg Kroah-Hartman , Kate Stewart , dri-devel@lists.freedesktop.org, Thomas Gleixner , Weiyi Lu , Seiya Wang , Matthias Brugger , Andrew-CT Chen , linux-clk@vger.kernel.org, linux-mediatek@lists.infradead.org, Daniel Vetter , linux-arm-kernel@lists.infradead.org, matthias.bgg@kernel.org, Minghsiu Tsai , frank-w@public-files.de, devicetree@vger.kernel.org, Mauro Carvalho Chehab , Collabora Kernel ML , Houlong Wei , linux-kernel@vger.kernel.org, mtk01761 , Richard Fontana , Fabien Parent , James Liao , Krzysztof Kozlowski , Nicolas Boichat , Owen Chen Subject: [PATCH v12 0/5] arm/arm64: mediatek: Fix mt8173 mmsys device probing Date: Wed, 11 Mar 2020 17:53:17 +0100 Message-Id: <20200311165322.1594233-1-enric.balletbo@collabora.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org Dear all, These patches are intended to solve an old standing issue on some Mediatek devices (mt8173, mt2701 and mt2712 are affected by this issue). Up to now both drivers, clock and drm are probed with the same device tree compatible. But only the first driver gets probed, which in effect breaks graphics on those devices. The MMSYS (Multimedia subsystem) in Mediatek SoCs has some registers to control clock gates (which is used in the clk driver) and some registers to set the routing and enable the differnet blocks of the display and MDP (Media Data Path) subsystem. On this series the clk driver is not a pure clock controller but a system controller that can provide access to the shared registers between the different drivers that need it (mediatek-drm and mediatek-mdp). Hence the MMSYS clk driver was moved to drivers/soc/mediatek and is the entry point (parent) which will trigger the probe of the corresponding mediatek-drm driver. **IMPORTANT** This series only fixes the issue on mt8173 to make it simple and as is the only platform I can test. Similar changes should be applied for mt2701 and mt2712 to have display working. These patches apply on top of linux-next. For reference, here are the links to the old discussions: * v11: https://patchwork.kernel.org/project/linux-mediatek/list/?series=249871 * v10: https://patchwork.kernel.org/project/linux-mediatek/list/?series=248505 * v9: https://patchwork.kernel.org/project/linux-clk/list/?series=247591 * v8: https://patchwork.kernel.org/project/linux-mediatek/list/?series=244891 * v7: https://patchwork.kernel.org/project/linux-mediatek/list/?series=241217 * v6: https://patchwork.kernel.org/project/linux-mediatek/list/?series=213219 * v5: https://patchwork.kernel.org/project/linux-mediatek/list/?series=44063 * v4: * https://patchwork.kernel.org/patch/10530871/ * https://patchwork.kernel.org/patch/10530883/ * https://patchwork.kernel.org/patch/10530885/ * https://patchwork.kernel.org/patch/10530911/ * https://patchwork.kernel.org/patch/10530913/ * v3: * https://patchwork.kernel.org/patch/10367857/ * https://patchwork.kernel.org/patch/10367861/ * https://patchwork.kernel.org/patch/10367877/ * https://patchwork.kernel.org/patch/10367875/ * https://patchwork.kernel.org/patch/10367885/ * https://patchwork.kernel.org/patch/10367883/ * https://patchwork.kernel.org/patch/10367889/ * https://patchwork.kernel.org/patch/10367907/ * https://patchwork.kernel.org/patch/10367909/ * https://patchwork.kernel.org/patch/10367905/ * v2: No relevant discussion, see v3 * v1: * https://patchwork.kernel.org/patch/10016497/ * https://patchwork.kernel.org/patch/10016499/ * https://patchwork.kernel.org/patch/10016505/ * https://patchwork.kernel.org/patch/10016507/ Best regards, Enric Changes in v12: - Leave the clocks part in drivers/clk (clk-mt8173-mm) - Instantiate the clock driver from the mtk-mmsys driver. - Add default config option to not break anything. - Removed the Reviewed-by CK tag as changed the organization. Changes in v10: - Update the binding documentation for the mmsys system controller. - Renamed to be generic mtk-mmsys - Add driver data support to be able to support diferent SoCs - Select CONFIG_MTK_MMSYS (CK) - Pass device pointer of mmsys device instead of config regs (CK) - Match driver data to get display routing. Changes in v9: - Move mmsys to drivers/soc/mediatek (CK) - Introduced a new patch to move routing control into mmsys driver. - Removed the patch to use regmap as is not needed anymore. - Do not move the display routing from the drm driver (CK) Changes in v8: - Be a builtin_platform_driver like other mediatek mmsys drivers. - New patch introduced in this series. Changes in v7: - Free clk_data->clks as well - Get rid of private data structure Enric Balletbo i Serra (3): dt-bindings: mediatek: Update mmsys binding to reflect it is a system controller soc / drm: mediatek: Move routing control to mmsys device soc / drm: mediatek: Fix mediatek-drm device probing Matthias Brugger (2): drm/mediatek: Omit warning on probe defers clk / soc: mediatek: Move mt8173 MMSYS to platform driver .../bindings/arm/mediatek/mediatek,mmsys.txt | 7 +- drivers/clk/mediatek/Kconfig | 7 + drivers/clk/mediatek/Makefile | 1 + drivers/clk/mediatek/clk-mt8173-mm.c | 146 ++++++++ drivers/clk/mediatek/clk-mt8173.c | 104 ------ drivers/gpu/drm/mediatek/Kconfig | 1 + drivers/gpu/drm/mediatek/mtk_disp_color.c | 5 +- drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 5 +- drivers/gpu/drm/mediatek/mtk_disp_rdma.c | 5 +- drivers/gpu/drm/mediatek/mtk_dpi.c | 12 +- drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 19 +- drivers/gpu/drm/mediatek/mtk_drm_ddp.c | 259 +------------- drivers/gpu/drm/mediatek/mtk_drm_ddp.h | 7 - drivers/gpu/drm/mediatek/mtk_drm_drv.c | 45 +-- drivers/gpu/drm/mediatek/mtk_drm_drv.h | 2 +- drivers/gpu/drm/mediatek/mtk_dsi.c | 8 +- drivers/gpu/drm/mediatek/mtk_hdmi.c | 4 +- drivers/soc/mediatek/Kconfig | 8 + drivers/soc/mediatek/Makefile | 1 + drivers/soc/mediatek/mtk-mmsys.c | 335 ++++++++++++++++++ include/linux/soc/mediatek/mtk-mmsys.h | 20 ++ 21 files changed, 590 insertions(+), 411 deletions(-) create mode 100644 drivers/clk/mediatek/clk-mt8173-mm.c create mode 100644 drivers/soc/mediatek/mtk-mmsys.c create mode 100644 include/linux/soc/mediatek/mtk-mmsys.h