linux-kernel - [PATCH v4 02/11] drm/bridge: cdns-dsi: Move to devm_drm_of_get

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Date: Sat, 22 Jun 2024 16:39:20 +0530
From: Aradhya Bhatia <a-bhatia1@...com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Tomi Valkeinen
	<tomi.valkeinen@...asonboard.com>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman
	<jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Maarten
 Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard
	<mripard@...nel.org>, Jyri Sarha <jyri.sarha@....fi>,
        Thomas Zimmermann
	<tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>, Daniel Vetter
	<daniel@...ll.ch>
CC: DRI Development List <dri-devel@...ts.freedesktop.org>,
        Linux Kernel List
	<linux-kernel@...r.kernel.org>,
        Dominik Haller <d.haller@...tec.de>, Sam
 Ravnborg <sam@...nborg.org>,
        Thierry Reding <treding@...dia.com>,
        Kieran
 Bingham <kieran.bingham+renesas@...asonboard.com>,
        Nishanth Menon
	<nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
        Praneeth Bajjuri
	<praneeth@...com>, Udit Kumar <u-kumar1@...com>,
        Devarsh Thakkar
	<devarsht@...com>,
        Jayesh Choudhary <j-choudhary@...com>, Jai Luthra
	<j-luthra@...com>,
        Aradhya Bhatia <a-bhatia1@...com>
Subject: [PATCH v4 02/11] drm/bridge: cdns-dsi: Move to devm_drm_of_get_bridge()

Instead of manually finding the next bridge/panel, and maintaining the
panel-bridge (in-case the next entity is a panel), switch to using the
automatically managing devm_drm_of_get_bridge() API.

Drop the drm_panel support completely from the driver while at it.

Signed-off-by: Aradhya Bhatia <a-bhatia1@...com>
---
 .../gpu/drm/bridge/cadence/cdns-dsi-core.c    | 28 ++-----------------
 .../gpu/drm/bridge/cadence/cdns-dsi-core.h    |  2 --
 2 files changed, 3 insertions(+), 27 deletions(-)

diff --git a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
index b016f2ba06bb..5159c3f0853e 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
@@ -920,8 +920,6 @@ static int cdns_dsi_attach(struct mipi_dsi_host *host,
 	struct cdns_dsi_output *output = &dsi->output;
 	struct cdns_dsi_input *input = &dsi->input;
 	struct drm_bridge *bridge;
-	struct drm_panel *panel;
-	struct device_node *np;
 	int ret;
 
 	/*
@@ -939,26 +937,10 @@ static int cdns_dsi_attach(struct mipi_dsi_host *host,
 	/*
 	 * The host <-> device link might be described using an OF-graph
 	 * representation, in this case we extract the device of_node from
-	 * this representation, otherwise we use dsidev->dev.of_node which
-	 * should have been filled by the core.
+	 * this representation.
 	 */
-	np = of_graph_get_remote_node(dsi->base.dev->of_node, DSI_OUTPUT_PORT,
-				      dev->channel);
-	if (!np)
-		np = of_node_get(dev->dev.of_node);
-
-	panel = of_drm_find_panel(np);
-	if (!IS_ERR(panel)) {
-		bridge = drm_panel_bridge_add_typed(panel,
-						    DRM_MODE_CONNECTOR_DSI);
-	} else {
-		bridge = of_drm_find_bridge(np);
-		if (!bridge)
-			bridge = ERR_PTR(-EINVAL);
-	}
-
-	of_node_put(np);
-
+	bridge = devm_drm_of_get_bridge(dsi->base.dev, dsi->base.dev->of_node,
+					DSI_OUTPUT_PORT, dev->channel);
 	if (IS_ERR(bridge)) {
 		ret = PTR_ERR(bridge);
 		dev_err(host->dev, "failed to add DSI device %s (err = %d)",
@@ -968,7 +950,6 @@ static int cdns_dsi_attach(struct mipi_dsi_host *host,
 
 	output->dev = dev;
 	output->bridge = bridge;
-	output->panel = panel;
 
 	/*
 	 * The DSI output has been properly configured, we can now safely
@@ -984,12 +965,9 @@ static int cdns_dsi_detach(struct mipi_dsi_host *host,
 			   struct mipi_dsi_device *dev)
 {
 	struct cdns_dsi *dsi = to_cdns_dsi(host);
-	struct cdns_dsi_output *output = &dsi->output;
 	struct cdns_dsi_input *input = &dsi->input;
 
 	drm_bridge_remove(&input->bridge);
-	if (output->panel)
-		drm_panel_bridge_remove(output->bridge);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.h b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.h
index ca7ea2da635c..5db5dbbbcaad 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.h
+++ b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.h
@@ -10,7 +10,6 @@
 
 #include <drm/drm_bridge.h>
 #include <drm/drm_mipi_dsi.h>
-#include <drm/drm_panel.h>
 
 #include <linux/bits.h>
 #include <linux/completion.h>
@@ -21,7 +20,6 @@ struct reset_control;
 
 struct cdns_dsi_output {
 	struct mipi_dsi_device *dev;
-	struct drm_panel *panel;
 	struct drm_bridge *bridge;
 	union phy_configure_opts phy_opts;
 };
-- 
2.34.1