From patchwork Thu Feb 20 17:21:41 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: 11394689 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 533AD13A4 for ; Thu, 20 Feb 2020 17:22:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 33E412467B for ; Thu, 20 Feb 2020 17:22:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728799AbgBTRWA (ORCPT ); Thu, 20 Feb 2020 12:22:00 -0500 Received: from bhuna.collabora.co.uk ([46.235.227.227]:48646 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726959AbgBTRWA (ORCPT ); Thu, 20 Feb 2020 12:22:00 -0500 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: eballetbo) with ESMTPSA id CCF2F29527F 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: Mauro Carvalho Chehab , rdunlap@infradead.org, dri-devel@lists.freedesktop.org, Weiyi Lu , Seiya Wang , linux-clk@vger.kernel.org, Collabora Kernel ML , mtk01761 , Allison Randal , Thomas Gleixner , wens@csie.org, Kate Stewart , Greg Kroah-Hartman , Houlong Wei , Matthias Brugger , linux-media@vger.kernel.org, devicetree@vger.kernel.org, sean.wang@mediatek.com, frank-w@public-files.de, Minghsiu Tsai , Andrew-CT Chen , linux-mediatek@lists.infradead.org, hsinyi@chromium.org, Matthias Brugger , linux-arm-kernel@lists.infradead.org, Richard Fontana , linux-kernel@vger.kernel.org, matthias.bgg@kernel.org, Daniel Vetter , Fabien Parent , Krzysztof Kozlowski , Nicolas Boichat , Owen Chen Subject: [PATCH v8 0/6] arm/arm64: mediatek: Fix mmsys device probing Date: Thu, 20 Feb 2020 18:21:41 +0100 Message-Id: <20200220172147.919996-1-enric.balletbo@collabora.com> X-Mailer: git-send-email 2.25.0 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, Those patches are intended to solve an old standing issue on some Mediatek devices (mt8173, mt2701 and mt2712) in a slightly different way to the precedent series. Up to now both drivers, clock and drm are probed with the same device tree compatible. But only the first driver get probed, which in effect breaks graphics on those devices. The version eight of the series tries to solve the problem with a different approach than the previous series but similar to how is solved on other Mediatek 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). And the biggest change is, that in this version, clk driver is the entry point (parent) which will trigger the probe of the corresponding mediatek-drm driver and pass its MMSYS platform data for display configuration. All this series was tested on the Acer R13 Chromebook only. For reference, here are the links to the old discussions: * 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 v8: - Be a builtin_platform_driver like other mediatek mmsys drivers. - New patches introduced in this series. Changes in v7: - Add R-by from CK - Add R-by from CK - Fix check of return value of of_clk_get - Fix identation - Free clk_data->clks as well - Get rid of private data structure Enric Balletbo i Serra (2): drm/mediatek: Move MMSYS configuration to include/linux/platform_data clk/drm: mediatek: Fix mediatek-drm device probing Matthias Brugger (4): drm/mediatek: Use regmap for register access drm/mediatek: Omit warning on probe defers media: mtk-mdp: Check return value of of_clk_get clk: mediatek: mt8173: Switch MMSYS to platform driver drivers/clk/mediatek/Kconfig | 6 + drivers/clk/mediatek/Makefile | 1 + drivers/clk/mediatek/clk-mt2701-mm.c | 30 +++ drivers/clk/mediatek/clk-mt2712-mm.c | 44 +++++ drivers/clk/mediatek/clk-mt8173-mm.c | 172 ++++++++++++++++++ drivers/clk/mediatek/clk-mt8173.c | 104 ----------- 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 | 4 +- drivers/gpu/drm/mediatek/mtk_drm_ddp.c | 53 +++--- drivers/gpu/drm/mediatek/mtk_drm_ddp.h | 4 +- drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 56 +----- drivers/gpu/drm/mediatek/mtk_drm_drv.c | 113 +----------- drivers/gpu/drm/mediatek/mtk_drm_drv.h | 13 +- drivers/gpu/drm/mediatek/mtk_dsi.c | 8 +- drivers/gpu/drm/mediatek/mtk_hdmi.c | 4 +- drivers/media/platform/mtk-mdp/mtk_mdp_comp.c | 6 + include/linux/platform_data/mtk_mmsys.h | 73 ++++++++ 20 files changed, 401 insertions(+), 317 deletions(-) create mode 100644 drivers/clk/mediatek/clk-mt8173-mm.c create mode 100644 include/linux/platform_data/mtk_mmsys.h