From patchwork Wed Mar 11 11:56:14 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: 11431429 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 A701F1731 for ; Wed, 11 Mar 2020 11:57:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8FE1422525 for ; Wed, 11 Mar 2020 11:57:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729285AbgCKL47 (ORCPT ); Wed, 11 Mar 2020 07:56:59 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:57394 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729244AbgCKL46 (ORCPT ); Wed, 11 Mar 2020 07:56:58 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: eballetbo) with ESMTPSA id B2559295EBA 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: Matthias Brugger , linux-media@vger.kernel.org, Allison Randal , Greg Kroah-Hartman , linux-mediatek@lists.infradead.org, Collabora Kernel ML , dri-devel@lists.freedesktop.org, Seiya Wang , linux-kernel@vger.kernel.org, wens@csie.org, Daniel Vetter , linux-clk@vger.kernel.org, Mauro Carvalho Chehab , Kate Stewart , devicetree@vger.kernel.org, Matthias Brugger , Thomas Gleixner , frank-w@public-files.de, linux-arm-kernel@lists.infradead.org, hsinyi@chromium.org, Richard Fontana , mtk01761 , Weiyi Lu , sean.wang@mediatek.com, rdunlap@infradead.org, matthias.bgg@kernel.org, Andrew-CT Chen , Houlong Wei , Minghsiu Tsai Subject: [PATCH v11 5/5] soc / drm: mediatek: Fix mediatek-drm device probing Date: Wed, 11 Mar 2020 12:56:14 +0100 Message-Id: <20200311115614.1425528-6-enric.balletbo@collabora.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200311115614.1425528-1-enric.balletbo@collabora.com> References: <20200311115614.1425528-1-enric.balletbo@collabora.com> MIME-Version: 1.0 Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org In the actual implementation the same compatible string "mediatek,-mmsys" is used to bind the clock drivers (drivers/soc/mediatek) as well as to the gpu driver (drivers/gpu/drm/mediatek/mtk_drm_drv.c). This ends with the problem that the only probed driver is the clock driver and there is no display at all. In any case having the same compatible string for two drivers is not correct and should be fixed. To fix this, and maintain backward compatibility, we can consider that the mmsys driver is the top-level entry point for the multimedia subsystem, so is not a pure clock controller but a system controller, and the drm driver is instantiated by that MMSYS driver. Signed-off-by: Enric Balletbo i Serra Reviewed-by: CK Hu Acked-by: CK Hu --- Changes in v11: None Changes in v10: - Match driver data to get display routing. Changes in v9: - Do not move the display routing from the drm driver (CK) Changes in v8: - New patch introduced in this series. Changes in v7: None drivers/gpu/drm/mediatek/mtk_drm_drv.c | 31 ++++++++++++++++---------- drivers/soc/mediatek/mtk-mmsys.c | 6 +++++ 2 files changed, 25 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c index 208f9c5256ef..bb26e346750a 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c @@ -422,9 +422,21 @@ static const struct of_device_id mtk_ddp_comp_dt_ids[] = { { } }; +static const struct of_device_id mtk_drm_of_ids[] = { + { .compatible = "mediatek,mt2701-mmsys", + .data = &mt2701_mmsys_driver_data}, + { .compatible = "mediatek,mt2712-mmsys", + .data = &mt2712_mmsys_driver_data}, + { .compatible = "mediatek,mt8173-mmsys", + .data = &mt8173_mmsys_driver_data}, + { } +}; + static int mtk_drm_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct device_node *phandle = dev->parent->of_node; + const struct of_device_id *of_id; struct mtk_drm_private *private; struct device_node *node; struct component_match *match = NULL; @@ -442,8 +454,14 @@ static int mtk_drm_probe(struct platform_device *pdev) return -ENODEV; } + of_id = of_match_node(mtk_drm_of_ids, phandle); + if (!of_id) + return -ENODEV; + + private->data = of_id->data; + /* Iterate over sibling DISP function blocks */ - for_each_child_of_node(dev->of_node->parent, node) { + for_each_child_of_node(phandle->parent, node) { const struct of_device_id *of_id; enum mtk_ddp_comp_type comp_type; int comp_id; @@ -575,22 +593,11 @@ static int mtk_drm_sys_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(mtk_drm_pm_ops, mtk_drm_sys_suspend, mtk_drm_sys_resume); -static const struct of_device_id mtk_drm_of_ids[] = { - { .compatible = "mediatek,mt2701-mmsys", - .data = &mt2701_mmsys_driver_data}, - { .compatible = "mediatek,mt2712-mmsys", - .data = &mt2712_mmsys_driver_data}, - { .compatible = "mediatek,mt8173-mmsys", - .data = &mt8173_mmsys_driver_data}, - { } -}; - static struct platform_driver mtk_drm_platform_driver = { .probe = mtk_drm_probe, .remove = mtk_drm_remove, .driver = { .name = "mediatek-drm", - .of_match_table = mtk_drm_of_ids, .pm = &mtk_drm_pm_ops, }, }; diff --git a/drivers/soc/mediatek/mtk-mmsys.c b/drivers/soc/mediatek/mtk-mmsys.c index 4b286b525cd3..32a92ec447c5 100644 --- a/drivers/soc/mediatek/mtk-mmsys.c +++ b/drivers/soc/mediatek/mtk-mmsys.c @@ -285,6 +285,7 @@ static int mtk_mmsys_probe(struct platform_device *pdev) const struct mtk_mmsys_driver_data *data; struct device *dev = &pdev->dev; struct platform_device *clks; + struct platform_device *drm; void __iomem *config_regs; struct resource *mem; int ret; @@ -307,6 +308,11 @@ static int mtk_mmsys_probe(struct platform_device *pdev) if (IS_ERR(clks)) return PTR_ERR(clks); + drm = platform_device_register_data(&pdev->dev, "mediatek-drm", + PLATFORM_DEVID_AUTO, NULL, 0); + if (IS_ERR(drm)) + return PTR_ERR(drm); + return 0; }