Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Maxime Ripard <maxime@cerno.tech>
To:     Robert Foss <robert.foss@linaro.org>,
        Andrzej Hajda <a.hajda@samsung.com>,
        Daniel Vetter <daniel.vetter@intel.com>,
        David Airlie <airlied@linux.ie>,
        Sam Ravnborg <sam@ravnborg.org>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        Maxime Ripard <maxime@cerno.tech>,
        Neil Armstrong <narmstrong@baylibre.com>,
        Jonas Karlman <jonas@kwiboo.se>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        Thierry Reding <thierry.reding@gmail.com>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc:     dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: [PATCH 07/10] drm/vc4: dsi: Switch to drm_of_get_next
Date:   Tue, 20 Jul 2021 15:45:22 +0200
Message-Id: <20210720134525.563936-8-maxime@cerno.tech>
In-Reply-To: <20210720134525.563936-1-maxime@cerno.tech>
References: <20210720134525.563936-1-maxime@cerno.tech>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

The new drm_of_get_next removes most of the boilerplate we have to deal
with. Let's switch to it.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_drv.c |  2 ++
 drivers/gpu/drm/vc4/vc4_dsi.c | 28 ++++------------------------
 2 files changed, 6 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
index 73335feb712f..ff056ee8bc4b 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -25,7 +25,9 @@
 #include <linux/device.h>
 #include <linux/dma-mapping.h>
 #include <linux/io.h>
+#include <linux/i2c.h>
 #include <linux/module.h>
+#include <linux/of_graph.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
diff --git a/drivers/gpu/drm/vc4/vc4_dsi.c b/drivers/gpu/drm/vc4/vc4_dsi.c
index 6dfcbd9e234e..f51ce8db0f4e 100644
--- a/drivers/gpu/drm/vc4/vc4_dsi.c
+++ b/drivers/gpu/drm/vc4/vc4_dsi.c
@@ -1489,7 +1489,6 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data)
 	struct drm_device *drm = dev_get_drvdata(master);
 	struct vc4_dsi *dsi = dev_get_drvdata(dev);
 	struct vc4_dsi_encoder *vc4_dsi_encoder;
-	struct drm_panel *panel;
 	const struct of_device_id *match;
 	dma_cap_mask_t dma_mask;
 	int ret;
@@ -1601,27 +1600,9 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data)
 		return ret;
 	}
 
-	ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
-					  &panel, &dsi->bridge);
-	if (ret) {
-		/* If the bridge or panel pointed by dev->of_node is not
-		 * enabled, just return 0 here so that we don't prevent the DRM
-		 * dev from being registered. Of course that means the DSI
-		 * encoder won't be exposed, but that's not a problem since
-		 * nothing is connected to it.
-		 */
-		if (ret == -ENODEV)
-			return 0;
-
-		return ret;
-	}
-
-	if (panel) {
-		dsi->bridge = devm_drm_panel_bridge_add_typed(dev, panel,
-							      DRM_MODE_CONNECTOR_DSI);
-		if (IS_ERR(dsi->bridge))
-			return PTR_ERR(dsi->bridge);
-	}
+	dsi->bridge = devm_drm_of_get_next(dev, dev->of_node, 0, 0);
+	if (IS_ERR(dsi->bridge))
+		return PTR_ERR(dsi->bridge);
 
 	/* The esc clock rate is supposed to always be 100Mhz. */
 	ret = clk_set_rate(dsi->escape_clock, 100 * 1000000);
@@ -1661,8 +1642,7 @@ static void vc4_dsi_unbind(struct device *dev, struct device *master,
 {
 	struct vc4_dsi *dsi = dev_get_drvdata(dev);
 
-	if (dsi->bridge)
-		pm_runtime_disable(dev);
+	pm_runtime_disable(dev);
 
 	/*
 	 * Restore the bridge_chain so the bridge detach procedure can happen
-- 
2.31.1