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=-14.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 4E55BC4338F for ; Sun, 25 Jul 2021 17:10:23 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1D64560E77 for ; Sun, 25 Jul 2021 17:10:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 1D64560E77 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ravnborg.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=/+iDvtxnxK6ea5BDy3noD3WkubEsGMX5QQdpdwBjXVE=; b=OAlTrgUlBtPRA6 kRkdF6JtRf1pNO6X+ADViaG3qqchDnM5YMoISDpGs2bgFrX5kdSMkUqPxMHm/+t4wyYqi5PQqb5Hx bPvM46ixz+vRBVWvLKwO2xJNFFPrTWEJDS52Y9HYkB2ILNfxzm+5VJ5F3ddZvr/43HSdRk1//XEo9 RtQRXUWVGsGVUtI7M/xCPGFkhKOGeg5hwgdZilkYfXjkgnB7pFwUDhoC3sq0BxNlMVZoLIn0qLDZx Bv4tJjU49NE9cwPvo2LSy7nVT3HMSMT7/FiydD08omqGPc/yT+X8uhJ5B/CtPGOMQYP5GNl7JHubX W7N6uXFwPKzs8BdP4TpA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m7hc9-008tML-G0; Sun, 25 Jul 2021 17:08:33 +0000 Received: from mx2.smtp.larsendata.com ([91.221.196.228]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1m7hc5-008tLq-Su for linux-arm-kernel@lists.infradead.org; Sun, 25 Jul 2021 17:08:31 +0000 Received: from mail01.mxhotel.dk (mail01.mxhotel.dk [91.221.196.236]) by mx2.smtp.larsendata.com (Halon) with ESMTPS id f7c3d2b2-ed6a-11eb-8d1a-0050568cd888; Sun, 25 Jul 2021 17:08:44 +0000 (UTC) Received: from ravnborg.org (80-162-45-141-cable.dk.customer.tdc.net [80.162.45.141]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: sam@ravnborg.org) by mail01.mxhotel.dk (Postfix) with ESMTPSA id 301A2194B37; Sun, 25 Jul 2021 19:08:47 +0200 (CEST) Date: Sun, 25 Jul 2021 19:08:26 +0200 X-Report-Abuse-To: abuse@mxhotel.dk From: Sam Ravnborg To: Jagan Teki Cc: Inki Dae , Joonyoung Shim , Seung-Woo Kim , Kyungmin Park , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Frieder Schrempf , Daniel Vetter , Marek Vasut , Krzysztof Kozlowski , Fabio Estevam , devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org, dri-devel@lists.freedesktop.org, NXP Linux Team , linux-amarula , linux-arm-kernel@lists.infradead.org Subject: Re: [RFC PATCH 01/17] drm/exynos: dsi: Convert to bridge driver Message-ID: References: <20210704090230.26489-1-jagan@amarulasolutions.com> <20210704090230.26489-2-jagan@amarulasolutions.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210704090230.26489-2-jagan@amarulasolutions.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210725_100830_126627_775A6975 X-CRM114-Status: GOOD ( 31.10 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Jagan, See a few comments below. Sam On Sun, Jul 04, 2021 at 02:32:14PM +0530, Jagan Teki wrote: > DRM bridge drivers have built-in handling of treating > all display pipeline components as bridges. > > Convert exynos_drm_dsi to a bridge driver with built-in > encoder support for compatibility with existing component > drivers. > > This keeps switching the driver into the bridge in a more > feasible manner. > > Signed-off-by: Jagan Teki > --- > drivers/gpu/drm/exynos/exynos_drm_dsi.c | 57 +++++++++++++++++-------- > 1 file changed, 39 insertions(+), 18 deletions(-) > > diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c > index 1d777d8c1a83..90d2ce2c3055 100644 > --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c > +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c > @@ -257,6 +257,7 @@ struct exynos_dsi { > struct drm_connector connector; > struct drm_panel *panel; > struct list_head bridge_chain; > + struct drm_bridge bridge; > struct drm_bridge *out_bridge; > struct device *dev; > > @@ -287,9 +288,9 @@ struct exynos_dsi { > #define host_to_dsi(host) container_of(host, struct exynos_dsi, dsi_host) > #define connector_to_dsi(c) container_of(c, struct exynos_dsi, connector) > > -static inline struct exynos_dsi *encoder_to_dsi(struct drm_encoder *e) > +static inline struct exynos_dsi *bridge_to_dsi(struct drm_bridge *b) > { > - return container_of(e, struct exynos_dsi, encoder); > + return container_of(b, struct exynos_dsi, bridge); > } > > enum reg_idx { > @@ -1374,9 +1375,9 @@ static void exynos_dsi_unregister_te_irq(struct exynos_dsi *dsi) > } > } > > -static void exynos_dsi_enable(struct drm_encoder *encoder) > +static void exynos_dsi_bridge_enable(struct drm_bridge *bridge) > { > - struct exynos_dsi *dsi = encoder_to_dsi(encoder); > + struct exynos_dsi *dsi = bridge_to_dsi(bridge); > struct drm_bridge *iter; > int ret; > > @@ -1429,9 +1430,9 @@ static void exynos_dsi_enable(struct drm_encoder *encoder) > pm_runtime_put(dsi->dev); > } > > -static void exynos_dsi_disable(struct drm_encoder *encoder) > +static void exynos_dsi_bridge_disable(struct drm_bridge *bridge) > { > - struct exynos_dsi *dsi = encoder_to_dsi(encoder); > + struct exynos_dsi *dsi = bridge_to_dsi(bridge); > struct drm_bridge *iter; > > if (!(dsi->state & DSIM_STATE_ENABLED)) > @@ -1494,9 +1495,9 @@ static const struct drm_connector_helper_funcs exynos_dsi_connector_helper_funcs > .get_modes = exynos_dsi_get_modes, > }; > > -static int exynos_dsi_create_connector(struct drm_encoder *encoder) > +static int exynos_dsi_create_connector(struct exynos_dsi *dsi) > { > - struct exynos_dsi *dsi = encoder_to_dsi(encoder); > + struct drm_encoder *encoder = &dsi->encoder; > struct drm_connector *connector = &dsi->connector; > struct drm_device *drm = encoder->dev; > int ret; > @@ -1522,9 +1523,16 @@ static int exynos_dsi_create_connector(struct drm_encoder *encoder) > return 0; > } > > -static const struct drm_encoder_helper_funcs exynos_dsi_encoder_helper_funcs = { > - .enable = exynos_dsi_enable, > - .disable = exynos_dsi_disable, > +static int exynos_dsi_bridge_attach(struct drm_bridge *bridge, > + enum drm_bridge_attach_flags flags) > +{ > + return 0; > +} > + > +static const struct drm_bridge_funcs exynos_dsi_bridge_funcs = { > + .enable = exynos_dsi_bridge_enable, > + .disable = exynos_dsi_bridge_disable, > + .attach = exynos_dsi_bridge_attach, > }; For new bridge drivers please use atomic_{enable,disable}. The non-atomic variants are deprecated and it is now also documneted. It was not documented when you wrote this patch! Sam > > MODULE_DEVICE_TABLE(of, exynos_dsi_of_match); > @@ -1543,7 +1551,7 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host *host, > dsi->out_bridge = out_bridge; > list_splice_init(&encoder->bridge_chain, &dsi->bridge_chain); > } else { > - int ret = exynos_dsi_create_connector(encoder); > + int ret = exynos_dsi_create_connector(dsi); > > if (ret) { > DRM_DEV_ERROR(dsi->dev, > @@ -1596,7 +1604,7 @@ static int exynos_dsi_host_detach(struct mipi_dsi_host *host, > > if (dsi->panel) { > mutex_lock(&drm->mode_config.mutex); > - exynos_dsi_disable(&dsi->encoder); > + exynos_dsi_bridge_disable(&dsi->bridge); > dsi->panel = NULL; > dsi->connector.status = connector_status_disconnected; > mutex_unlock(&drm->mode_config.mutex); > @@ -1702,12 +1710,16 @@ static int exynos_dsi_bind(struct device *dev, struct device *master, > > drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS); > > - drm_encoder_helper_add(encoder, &exynos_dsi_encoder_helper_funcs); > - > ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD); > if (ret < 0) > return ret; > > + ret = drm_bridge_attach(&dsi->encoder, &dsi->bridge, NULL, 0); I assume a later patch will move connector creation to the display driver. > + if (ret) { > + drm_encoder_cleanup(&dsi->encoder); > + return ret; > + } > + > in_bridge_node = of_graph_get_remote_node(dev->of_node, DSI_PORT_IN, 0); > if (in_bridge_node) { > in_bridge = of_drm_find_bridge(in_bridge_node); > @@ -1723,10 +1735,9 @@ static void exynos_dsi_unbind(struct device *dev, struct device *master, > void *data) > { > struct exynos_dsi *dsi = dev_get_drvdata(dev); > - struct drm_encoder *encoder = &dsi->encoder; > - > - exynos_dsi_disable(encoder); > > + exynos_dsi_bridge_disable(&dsi->bridge); > + drm_encoder_cleanup(&dsi->encoder); > mipi_dsi_host_unregister(&dsi->dsi_host); > } > > @@ -1821,6 +1832,12 @@ static int exynos_dsi_probe(struct platform_device *pdev) > > pm_runtime_enable(dev); > > + dsi->bridge.funcs = &exynos_dsi_bridge_funcs; > + dsi->bridge.of_node = dev->of_node; > + dsi->bridge.type = DRM_MODE_CONNECTOR_DSI; > + > + drm_bridge_add(&dsi->bridge); > + > ret = component_add(dev, &exynos_dsi_component_ops); > if (ret) > goto err_disable_runtime; > @@ -1835,6 +1852,10 @@ static int exynos_dsi_probe(struct platform_device *pdev) > > static int exynos_dsi_remove(struct platform_device *pdev) > { > + struct exynos_dsi *dsi = platform_get_drvdata(pdev); > + > + drm_bridge_remove(&dsi->bridge); > + > pm_runtime_disable(&pdev->dev); > > component_del(&pdev->dev, &exynos_dsi_component_ops); > -- > 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel