From patchwork Mon Aug 6 00:26:57 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 10556255 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DAF111708 for ; Mon, 6 Aug 2018 00:28:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CAA18291C4 for ; Mon, 6 Aug 2018 00:28:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BE204291CF; Mon, 6 Aug 2018 00:28:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 5A333291C4 for ; Mon, 6 Aug 2018 00:28:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4FB176E183; Mon, 6 Aug 2018 00:27:20 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by gabe.freedesktop.org (Postfix) with ESMTPS id 02B8F6E180 for ; Mon, 6 Aug 2018 00:27:18 +0000 (UTC) Received: from avalon.bb.dnainternet.fi (dfj612ybrt5fhg77mgycy-3.rev.dnainternet.fi [IPv6:2001:14ba:21f5:5b00:2e86:4862:ef6a:2804]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id C83371BD6; Mon, 6 Aug 2018 02:27:09 +0200 (CEST) From: Laurent Pinchart To: dri-devel@lists.freedesktop.org Subject: [PATCH v3 17/61] drm/omap: dss: Rework output lookup by port node Date: Mon, 6 Aug 2018 03:26:57 +0300 Message-Id: <20180806002741.30929-18-laurent.pinchart@ideasonboard.com> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20180806002741.30929-1-laurent.pinchart@ideasonboard.com> References: <20180806002741.30929-1-laurent.pinchart@ideasonboard.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Tomi Valkeinen MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP The omap_dss_find_output_by_port_node() function defined in output.c looks up an output from its port node. To do so it needs to call helper functions from dss-of.c to lookup the port parent and the port number. As omap_dss_find_output_by_port_node() is only called by omapdss_of_find_source_for_first_ep() from dss-of.c this goes back and forth between the to source files and isn't very clear. Simplify the code by passing both the parent and the port number to omap_dss_find_output_by_port_node() instead of the port node, and rename the function to omap_dss_find_output_by_port(). Signed-off-by: Laurent Pinchart Reviewed-by: Sebastian Reichel --- drivers/gpu/drm/omapdrm/dss/dss-of.c | 39 ++++++++++++++++------------------- drivers/gpu/drm/omapdrm/dss/omapdss.h | 6 ++---- drivers/gpu/drm/omapdrm/dss/output.c | 17 +++------------ 3 files changed, 23 insertions(+), 39 deletions(-) diff --git a/drivers/gpu/drm/omapdrm/dss/dss-of.c b/drivers/gpu/drm/omapdrm/dss/dss-of.c index 4602a79c6c44..b51af09e9111 100644 --- a/drivers/gpu/drm/omapdrm/dss/dss-of.c +++ b/drivers/gpu/drm/omapdrm/dss/dss-of.c @@ -21,7 +21,8 @@ #include "omapdss.h" -struct device_node *dss_of_port_get_parent_device(struct device_node *port) +static struct device_node * +dss_of_port_get_parent_device(struct device_node *port) { struct device_node *np; int i; @@ -45,40 +46,36 @@ struct device_node *dss_of_port_get_parent_device(struct device_node *port) return NULL; } -u32 dss_of_port_get_port_number(struct device_node *port) -{ - int r; - u32 reg; - - r = of_property_read_u32(port, "reg", ®); - if (r) - reg = 0; - - return reg; -} - struct omap_dss_device * omapdss_of_find_source_for_first_ep(struct device_node *node) { - struct device_node *ep; + struct device_node *src_node; struct device_node *src_port; + struct device_node *ep; struct omap_dss_device *src; + u32 port_number = 0; + /* Get the endpoint... */ ep = of_graph_get_endpoint_by_regs(node, 0, 0); if (!ep) return ERR_PTR(-EINVAL); + /* ... and its remote port... */ src_port = of_graph_get_remote_port(ep); - if (!src_port) { - of_node_put(ep); - return ERR_PTR(-EINVAL); - } - of_node_put(ep); + if (!src_port) + return ERR_PTR(-EINVAL); - src = omap_dss_find_output_by_port_node(src_port); - + /* ... and the remote port's number and parent... */ + of_property_read_u32(src_port, "reg", &port_number); + src_node = dss_of_port_get_parent_device(src_port); of_node_put(src_port); + if (!src_node) + return NULL; + + /* ... and finally the source. */ + src = omap_dss_find_output_by_port(src_node, port_number); + of_node_put(src_node); return src ? src : ERR_PTR(-EPROBE_DEFER); } diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h index 1ccf0c67d308..ff0f603bce76 100644 --- a/drivers/gpu/drm/omapdrm/dss/omapdss.h +++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h @@ -576,7 +576,8 @@ int omap_dss_get_num_overlays(void); int omapdss_register_output(struct omap_dss_device *output); void omapdss_unregister_output(struct omap_dss_device *output); struct omap_dss_device *omap_dss_get_output(enum omap_dss_output_id id); -struct omap_dss_device *omap_dss_find_output_by_port_node(struct device_node *port); +struct omap_dss_device *omap_dss_find_output_by_port(struct device_node *src, + unsigned int port); int omapdss_output_set_device(struct omap_dss_device *out, struct omap_dss_device *dssdev); int omapdss_output_unset_device(struct omap_dss_device *out); @@ -603,9 +604,6 @@ static inline bool omapdss_device_is_enabled(struct omap_dss_device *dssdev) struct omap_dss_device * omapdss_of_find_source_for_first_ep(struct device_node *node); -struct device_node *dss_of_port_get_parent_device(struct device_node *port); -u32 dss_of_port_get_port_number(struct device_node *port); - enum dss_writeback_channel { DSS_WB_LCD1_MGR = 0, DSS_WB_LCD2_MGR = 1, diff --git a/drivers/gpu/drm/omapdrm/dss/output.c b/drivers/gpu/drm/omapdrm/dss/output.c index 7f18153a1bde..be254ea42e08 100644 --- a/drivers/gpu/drm/omapdrm/dss/output.c +++ b/drivers/gpu/drm/omapdrm/dss/output.c @@ -122,27 +122,16 @@ struct omap_dss_device *omap_dss_get_output(enum omap_dss_output_id id) } EXPORT_SYMBOL(omap_dss_get_output); -struct omap_dss_device *omap_dss_find_output_by_port_node(struct device_node *port) +struct omap_dss_device *omap_dss_find_output_by_port(struct device_node *src, + unsigned int port) { - struct device_node *src_node; struct omap_dss_device *out; - u32 reg; - - src_node = dss_of_port_get_parent_device(port); - if (!src_node) - return NULL; - - reg = dss_of_port_get_port_number(port); list_for_each_entry(out, &output_list, output_list) { - if (out->dev->of_node == src_node && out->port_num == reg) { - of_node_put(src_node); + if (out->dev->of_node == src && out->port_num == port) return omap_dss_get_device(out); - } } - of_node_put(src_node); - return NULL; }