diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
index e7799b6ee8293d706252c07c79cc15c6e2c44811..f987b4572d4a9c3d486c6bff49c9bad2e03abbe5 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c
@@ -22,7 +22,7 @@
#include <linux/of_graph.h>
#include <drm/drmP.h>
-#include <drm/drm_panel.h>
+#include <drm/drm_of.h>
#include "atmel_hlcdc_dc.h"
@@ -152,29 +152,11 @@ static const struct drm_connector_funcs atmel_hlcdc_panel_connector_funcs = {
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
-static int atmel_hlcdc_check_endpoint(struct drm_device *dev,
- const struct of_endpoint *ep)
-{
- struct device_node *np;
- void *obj;
-
- np = of_graph_get_remote_port_parent(ep->local_node);
-
- obj = of_drm_find_panel(np);
- if (!obj)
- obj = of_drm_find_bridge(np);
-
- of_node_put(np);
-
- return obj ? 0 : -EPROBE_DEFER;
-}
-
static int atmel_hlcdc_attach_endpoint(struct drm_device *dev,
- const struct of_endpoint *ep)
+ const struct device_node *np)
{
struct atmel_hlcdc_dc *dc = dev->dev_private;
struct atmel_hlcdc_rgb_output *output;
- struct device_node *np;
struct drm_panel *panel;
struct drm_bridge *bridge;
int ret;
@@ -195,13 +177,11 @@ static int atmel_hlcdc_attach_endpoint(struct drm_device *dev,
output->encoder.possible_crtcs = 0x1;
- np = of_graph_get_remote_port_parent(ep->local_node);
-
- ret = -EPROBE_DEFER;
+ ret = drm_of_find_panel_or_bridge(np, 0, 0, &panel, &bridge);
+ if (ret)
+ return ret;
- panel = of_drm_find_panel(np);
if (panel) {
- of_node_put(np);
output->connector.dpms = DRM_MODE_DPMS_OFF;
output->connector.polled = DRM_CONNECTOR_POLL_CONNECT;
drm_connector_helper_add(&output->connector,
@@ -226,9 +206,6 @@ static int atmel_hlcdc_attach_endpoint(struct drm_device *dev,
return 0;
}
- bridge = of_drm_find_bridge(np);
- of_node_put(np);
-
if (bridge) {
ret = drm_bridge_attach(&output->encoder, bridge, NULL);
if (!ret)
@@ -243,31 +220,23 @@ err_encoder_cleanup:
int atmel_hlcdc_create_outputs(struct drm_device *dev)
{
- struct device_node *ep_np = NULL;
- struct of_endpoint ep;
- int ret;
-
- for_each_endpoint_of_node(dev->dev->of_node, ep_np) {
- ret = of_graph_parse_endpoint(ep_np, &ep);
- if (!ret)
- ret = atmel_hlcdc_check_endpoint(dev, &ep);
-
- if (ret) {
- of_node_put(ep_np);
- return ret;
- }
- }
-
- for_each_endpoint_of_node(dev->dev->of_node, ep_np) {
- ret = of_graph_parse_endpoint(ep_np, &ep);
- if (!ret)
- ret = atmel_hlcdc_attach_endpoint(dev, &ep);
-
- if (ret) {
- of_node_put(ep_np);
+ struct device_node *remote;
+ int ret, endpoint = 0;
+
+ while (true) {
+ /* Loop thru possible multiple connections to the output */
+ remote = of_graph_get_remote_node(dev->dev->of_node, 0,
+ endpoint++);
+ if (!remote)
+ break;
+
+ ret = atmel_hlcdc_attach_endpoint(dev, remote);
+ of_node_put(remote);
+ if (ret)
return ret;
- }
}
- return 0;
+ if (!endpoint)
+ return -ENODEV;
+ return ret;
}
diff --git a/drivers/gpu/drm/bridge/nxp-ptn3460.c b/drivers/gpu/drm/bridge/nxp-ptn3460.c
index 27f98c518dde201f24d96022e584aad48fd0ecbb..351704390d02627dabf186b9e6391349da9728e5 100644
--- a/drivers/gpu/drm/bridge/nxp-ptn3460.c
+++ b/drivers/gpu/drm/bridge/nxp-ptn3460.c
@@ -20,8 +20,8 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
-#include <linux/of_graph.h>
+#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include "drm_crtc.h"
@@ -292,7 +292,6 @@ static int ptn3460_probe(struct i2c_client *client,
{
struct device *dev = &client->dev;
struct ptn3460_bridge *ptn_bridge;
- struct device_node *endpoint, *panel_node;
int ret;
ptn_bridge = devm_kzalloc(dev, sizeof(*ptn_bridge), GFP_KERNEL);
@@ -300,16 +299,9 @@ static int ptn3460_probe(struct i2c_client *client,
return -ENOMEM;
}
- endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
- if (endpoint) {
- panel_node = of_graph_get_remote_port_parent(endpoint);
- if (panel_node) {
- ptn_bridge->panel = of_drm_find_panel(panel_node);
- of_node_put(panel_node);
- if (!ptn_bridge->panel)
- return -EPROBE_DEFER;
- }
- }
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &ptn_bridge->panel, NULL);
+ if (ret)
+ return ret;
ptn_bridge->client = client;
diff --git a/drivers/gpu/drm/bridge/parade-ps8622.c b/drivers/gpu/drm/bridge/parade-ps8622.c
index ac8cc5b50d9f2a7720f49c03007a7f66208c801e..1dcec3b97e6777fa982f420ec6ea34e09abb7033 100644
--- a/drivers/gpu/drm/bridge/parade-ps8622.c
+++ b/drivers/gpu/drm/bridge/parade-ps8622.c
@@ -22,10 +22,10 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
-#include <linux/of_graph.h>
#include <linux/pm.h>
#include <linux/regulator/consumer.h>
+#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include "drmP.h"
@@ -536,7 +536,6 @@ static int ps8622_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
- struct device_node *endpoint, *panel_node;
struct ps8622_bridge *ps8622;
int ret;
@@ -544,16 +543,9 @@ static int ps8622_probe(struct i2c_client *client,
if (!ps8622)
return -ENOMEM;
- endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
- if (endpoint) {
- panel_node = of_graph_get_remote_port_parent(endpoint);
- if (panel_node) {
- ps8622->panel = of_drm_find_panel(panel_node);
- of_node_put(panel_node);
- if (!ps8622->panel)
- return -EPROBE_DEFER;
- }
- }
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &ps8622->panel, NULL);
+ if (ret)
+ return ret;
ps8622->client = client;
diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index de9ffb49e9f6fd016ba7824fab084c3d83cb58e4..5c26488e7a2d7a0320ddf321375b8ff4c200185f 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -1244,7 +1244,6 @@ static const struct regmap_config tc_regmap_config = {
static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
- struct device_node *ep;
struct tc_data *tc;
int ret;
@@ -1255,29 +1254,9 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
tc->dev = dev;
/* port@2 is the output port */
- ep = of_graph_get_endpoint_by_regs(dev->of_node, 2, -1);
- if (ep) {
- struct device_node *remote;
-
- remote = of_graph_get_remote_port_parent(ep);
- if (!remote) {
- dev_warn(dev, "endpoint %s not connected\n",
- ep->full_name);
- of_node_put(ep);
- return -ENODEV;
- }
- of_node_put(ep);
- tc->panel = of_drm_find_panel(remote);
- if (tc->panel) {
- dev_dbg(dev, "found panel %s\n", remote->full_name);
- } else {
- dev_dbg(dev, "waiting for panel %s\n",
- remote->full_name);
- of_node_put(remote);
- return -EPROBE_DEFER;
- }
- of_node_put(remote);
- }
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 2, 0, &tc->panel, NULL);
+ if (ret)
+ return ret;
/* Shut down GPIO is optional */
tc->sd_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c
index b445b50a5dc4f67e1acdb78ba990d0afeddd5b1d..385537b726a6acdcb990d5801aa3415fbac05d49 100644
--- a/drivers/gpu/drm/exynos/exynos_dp.c
+++ b/drivers/gpu/drm/exynos/exynos_dp.c
@@ -23,6 +23,7 @@
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
+#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <drm/bridge/analogix_dp.h>
@@ -211,8 +212,11 @@ static const struct component_ops exynos_dp_ops = {
static int exynos_dp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct device_node *np = NULL, *endpoint = NULL;
+ struct device_node *np;
struct exynos_dp_device *dp;
+ struct drm_panel *panel;
+ struct drm_bridge *bridge;
+ int ret;
dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
GFP_KERNEL);
@@ -236,28 +240,13 @@ static int exynos_dp_probe(struct platform_device *pdev)
goto out;
}
- endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
- if (endpoint) {
- np = of_graph_get_remote_port_parent(endpoint);
- if (np) {
- /* The remote port can be either a panel or a bridge */
- dp->plat_data.panel = of_drm_find_panel(np);
- if (!dp->plat_data.panel) {
- dp->ptn_bridge = of_drm_find_bridge(np);
- if (!dp->ptn_bridge) {
- of_node_put(np);
- return -EPROBE_DEFER;
- }
- }
- of_node_put(np);
- } else {
- DRM_ERROR("no remote endpoint device node found.\n");
- return -EINVAL;
- }
- } else {
- DRM_ERROR("no port endpoint subnode found.\n");
- return -EINVAL;
- }
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge);
+ if (ret)
+ return ret;
+
+ /* The remote port can be either a panel or a bridge */
+ dp->plat_data.panel = panel;
+ dp->ptn_bridge = bridge;
out:
return component_add(&pdev->dev, &exynos_dp_ops);
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
index c3651456c963f4a87b47694e9085f4663d0b2965..dcbf3c06e1d80f5b731ec018563802f13a2dc02a 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
@@ -15,6 +15,7 @@
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
+#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include "fsl_dcu_drm_drv.h"
@@ -141,32 +142,11 @@ err_cleanup:
return ret;
}
-static int fsl_dcu_attach_endpoint(struct fsl_dcu_drm_device *fsl_dev,
- const struct of_endpoint *ep)
-{
- struct drm_bridge *bridge;
- struct device_node *np;
-
- np = of_graph_get_remote_port_parent(ep->local_node);
-
- fsl_dev->connector.panel = of_drm_find_panel(np);
- if (fsl_dev->connector.panel) {
- of_node_put(np);
- return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
- }
-
- bridge = of_drm_find_bridge(np);
- of_node_put(np);
- if (!bridge)
- return -ENODEV;
-
- return drm_bridge_attach(&fsl_dev->encoder, bridge, NULL);
-}
-
int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
{
- struct of_endpoint ep;
- struct device_node *ep_node, *panel_node;
+ struct device_node *panel_node;
+ struct drm_panel *panel;
+ struct drm_bridge *bridge;
int ret;
/* This is for backward compatibility */
@@ -179,14 +159,14 @@ int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
}
- ep_node = of_graph_get_next_endpoint(fsl_dev->np, NULL);
- if (!ep_node)
- return -ENODEV;
-
- ret = of_graph_parse_endpoint(ep_node, &ep);
- of_node_put(ep_node);
+ ret = drm_of_find_panel_or_bridge(fsl_dev->np, 0, 0, &panel, &bridge);
if (ret)
- return -ENODEV;
+ return ret;
+
+ if (panel) {
+ fsl_dev->connector.panel = panel;
+ return fsl_dcu_attach_panel(fsl_dev, panel);
+ }
- return fsl_dcu_attach_endpoint(fsl_dev, &ep);
+ return drm_bridge_attach(&fsl_dev->encoder, bridge, NULL);
}
diff --git a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
index 1737e98bc10a26c499c466d386d0994938a6f92f..5abc69c9630fc28789a32c87b19e44397d1d58ba 100644
--- a/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
+++ b/drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c
@@ -17,7 +17,6 @@
#include <linux/clk.h>
#include <linux/component.h>
-#include <linux/of_graph.h>
#include <drm/drm_of.h>
#include <drm/drm_crtc_helper.h>
@@ -754,34 +753,16 @@ static int dsi_parse_dt(struct platform_device *pdev, struct dw_dsi *dsi)
{
struct dsi_hw_ctx *ctx = dsi->ctx;
struct device_node *np = pdev->dev.of_node;
- struct device_node *endpoint, *bridge_node;
- struct drm_bridge *bridge;
struct resource *res;
+ int ret;
/*
* Get the endpoint node. In our case, dsi has one output port1
* to which the external HDMI bridge is connected.
*/
- endpoint = of_graph_get_endpoint_by_regs(np, 1, -1);
- if (!endpoint) {
- DRM_ERROR("no valid endpoint node\n");
- return -ENODEV;
- }
- of_node_put(endpoint);
-
- bridge_node = of_graph_get_remote_port_parent(endpoint);
- if (!bridge_node) {
- DRM_ERROR("no valid bridge node\n");
- return -ENODEV;
- }
- of_node_put(bridge_node);
-
- bridge = of_drm_find_bridge(bridge_node);
- if (!bridge) {
- DRM_INFO("wait for external HDMI bridge driver.\n");
- return -EPROBE_DEFER;
- }
- dsi->bridge = bridge;
+ ret = drm_of_find_panel_or_bridge(np, 0, 0, NULL, &dsi->bridge);
+ if (ret)
+ return ret;
ctx->pclk = devm_clk_get(&pdev->dev, "pclk");
if (IS_ERR(ctx->pclk)) {
diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-ldb.c
index 88cd11d301341748245e4edc79170dc9fc223a57..8fb801fab039b10225765b044a4e535cf7a4201d 100644
--- a/drivers/gpu/drm/imx/imx-ldb.c
+++ b/drivers/gpu/drm/imx/imx-ldb.c
@@ -647,7 +647,6 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
for_each_child_of_node(np, child) {
struct imx_ldb_channel *channel;
- struct device_node *ep;
int bus_format;
ret = of_property_read_u32(child, "reg", &i);
@@ -671,27 +670,11 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
* The output port is port@4 with an external 4-port mux or
* port@2 with the internal 2-port mux.
*/
- ep = of_graph_get_endpoint_by_regs(child,
- imx_ldb->lvds_mux ? 4 : 2,
- -1);
- if (ep) {
- struct device_node *remote;
-
- remote = of_graph_get_remote_port_parent(ep);
- of_node_put(ep);
- if (remote) {
- channel->panel = of_drm_find_panel(remote);
- channel->bridge = of_drm_find_bridge(remote);
- } else
- return -EPROBE_DEFER;
- of_node_put(remote);
-
- if (!channel->panel && !channel->bridge) {
- dev_err(dev, "panel/bridge not found: %s\n",
- remote->full_name);
- return -EPROBE_DEFER;
- }
- }
+ ret = drm_of_find_panel_or_bridge(child,
+ imx_ldb->lvds_mux ? 4 : 2, 0,
+ &channel->panel, &channel->bridge);
+ if (ret)
+ return ret;
/* panel ddc only if there is no bridge */
if (!channel->bridge) {
diff --git a/drivers/gpu/drm/imx/parallel-display.c b/drivers/gpu/drm/imx/parallel-display.c
index d5c06fd89f9094f09c9565da68df1dfc15fcf089..636031a30e17d5b3b74aee7d99d475b0d681b097 100644
--- a/drivers/gpu/drm/imx/parallel-display.c
+++ b/drivers/gpu/drm/imx/parallel-display.c
@@ -19,10 +19,10 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>
+#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <linux/videodev2.h>
#include <video/of_display_timing.h>
-#include <linux/of_graph.h>
#include "imx-drm.h"
@@ -208,7 +208,6 @@ static int imx_pd_bind(struct device *dev, struct device *master, void *data)
{
struct drm_device *drm = data;
struct device_node *np = dev->of_node;
- struct device_node *ep;
const u8 *edidp;
struct imx_parallel_display *imxpd;
int ret;
@@ -237,36 +236,9 @@ static int imx_pd_bind(struct device *dev, struct device *master, void *data)
imxpd->bus_format = bus_format;
/* port@1 is the output port */
- ep = of_graph_get_endpoint_by_regs(np, 1, -1);
- if (ep) {
- struct device_node *remote;
-
- remote = of_graph_get_remote_port_parent(ep);
- if (!remote) {
- dev_warn(dev, "endpoint %s not connected\n",
- ep->full_name);
- of_node_put(ep);
- return -ENODEV;
- }
- of_node_put(ep);
-
- imxpd->panel = of_drm_find_panel(remote);
- if (imxpd->panel) {
- dev_dbg(dev, "found panel %s\n", remote->full_name);
- } else {
- imxpd->bridge = of_drm_find_bridge(remote);
- if (imxpd->bridge)
- dev_dbg(dev, "found bridge %s\n",
- remote->full_name);
- }
- if (!imxpd->panel && !imxpd->bridge) {
- dev_dbg(dev, "waiting for panel or bridge %s\n",
- remote->full_name);
- of_node_put(remote);
- return -EPROBE_DEFER;
- }
- of_node_put(remote);
- }
+ ret = drm_of_find_panel_or_bridge(np, 1, 0, &imxpd->panel, &imxpd->bridge);
+ if (ret)
+ return ret;
imxpd->dev = dev;
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index dd71cbb1a62201908c6a76694fe5594c77bae0ae..4d837b29ee9eaced38290c0dd382f17b534ea1ff 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -16,11 +16,11 @@
#include <drm/drm_crtc_helper.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_panel.h>
+#include <drm/drm_of.h>
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/of.h>
#include <linux/of_platform.h>
-#include <linux/of_graph.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <video/videomode.h>
@@ -801,7 +801,6 @@ static int mtk_dsi_probe(struct platform_device *pdev)
{
struct mtk_dsi *dsi;
struct device *dev = &pdev->dev;
- struct device_node *remote_node, *endpoint;
struct resource *regs;
int comp_id;
int ret;
@@ -813,22 +812,10 @@ static int mtk_dsi_probe(struct platform_device *pdev)
dsi->host.ops = &mtk_dsi_ops;
dsi->host.dev = dev;
- endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
- if (endpoint) {
- remote_node = of_graph_get_remote_port_parent(endpoint);
- if (!remote_node) {
- dev_err(dev, "No panel connected\n");
- return -ENODEV;
- }
-
- dsi->bridge = of_drm_find_bridge(remote_node);
- dsi->panel = of_drm_find_panel(remote_node);
- of_node_put(remote_node);
- if (!dsi->bridge && !dsi->panel) {
- dev_info(dev, "Waiting for bridge or panel driver\n");
- return -EPROBE_DEFER;
- }
- }
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
+ &dsi->panel, &dsi->bridge);
+ if (ret)
+ return ret;
dsi->engine_clk = devm_clk_get(dev, "engine");
if (IS_ERR(dsi->engine_clk)) {
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_out.c b/drivers/gpu/drm/mxsfb/mxsfb_out.c
index b8e81422d4e26f9f8c3f692955753bb046aebcca..f7d729aa09bd40528815817e9f94ed5060bcb8d9 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_out.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_out.c
@@ -19,6 +19,7 @@
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_simple_kms_helper.h>
@@ -82,20 +83,15 @@ static const struct drm_connector_funcs mxsfb_panel_connector_funcs = {
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
-static int mxsfb_attach_endpoint(struct drm_device *drm,
- const struct of_endpoint *ep)
+int mxsfb_create_output(struct drm_device *drm)
{
struct mxsfb_drm_private *mxsfb = drm->dev_private;
- struct device_node *np;
struct drm_panel *panel;
- int ret = -EPROBE_DEFER;
-
- np = of_graph_get_remote_port_parent(ep->local_node);
- panel = of_drm_find_panel(np);
- of_node_put(np);
+ int ret;
- if (!panel)
- return -EPROBE_DEFER;
+ ret = drm_of_find_panel_or_bridge(drm->dev->of_node, 0, 0, &panel, NULL);
+ if (ret)
+ return ret;
mxsfb->connector.dpms = DRM_MODE_DPMS_OFF;
mxsfb->connector.polled = 0;
@@ -109,27 +105,3 @@ static int mxsfb_attach_endpoint(struct drm_device *drm,
return ret;
}
-
-int mxsfb_create_output(struct drm_device *drm)
-{
- struct mxsfb_drm_private *mxsfb = drm->dev_private;
- struct device_node *ep_np = NULL;
- struct of_endpoint ep;
- int ret;
-
- for_each_endpoint_of_node(drm->dev->of_node, ep_np) {
- ret = of_graph_parse_endpoint(ep_np, &ep);
- if (!ret)
- ret = mxsfb_attach_endpoint(drm, &ep);
-
- if (ret) {
- of_node_put(ep_np);
- return ret;
- }
- }
-
- if (!mxsfb->panel)
- return -EPROBE_DEFER;
-
- return 0;
-}
diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
index 91ebe5c2c7a02bf9975ff1e7ad4ef694dd3e3b55..01b3f354ca0efe740a902188fd5a01d68cd7f28c 100644
--- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
@@ -428,31 +428,13 @@ static const struct component_ops rockchip_dp_component_ops = {
static int rockchip_dp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct device_node *panel_node, *port, *endpoint;
struct drm_panel *panel = NULL;
struct rockchip_dp_device *dp;
+ int ret;
- port = of_graph_get_port_by_id(dev->of_node, 1);
- if (port) {
- endpoint = of_get_child_by_name(port, "endpoint");
- of_node_put(port);
- if (!endpoint) {
- dev_err(dev, "no output endpoint found\n");
- return -EINVAL;
- }
-
- panel_node = of_graph_get_remote_port_parent(endpoint);
- of_node_put(endpoint);
- if (!panel_node) {
- dev_err(dev, "no output node found\n");
- return -EINVAL;
- }
-
- panel = of_drm_find_panel(panel_node);
- of_node_put(panel_node);
- if (!panel)
- return -EPROBE_DEFER;
- }
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 1, 0, &panel, NULL);
+ if (ret)
+ return ret;
dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
if (!dp)
diff --git a/drivers/gpu/drm/sun4i/sun4i_rgb.c b/drivers/gpu/drm/sun4i/sun4i_rgb.c
index 757208f5173115a553653b2f93f4c1de116cca7f..46280dd70c9e05800aed87a6de4e512066da46e9 100644
--- a/drivers/gpu/drm/sun4i/sun4i_rgb.c
+++ b/drivers/gpu/drm/sun4i/sun4i_rgb.c
@@ -15,6 +15,7 @@
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
+#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include "sun4i_drv.h"
@@ -218,9 +219,9 @@ int sun4i_rgb_init(struct drm_device *drm)
rgb->drv = drv;
encoder = &rgb->encoder;
- tcon->panel = sun4i_tcon_find_panel(tcon->dev->of_node);
- bridge = sun4i_tcon_find_bridge(tcon->dev->of_node);
- if (IS_ERR(tcon->panel) && IS_ERR(bridge)) {
+ ret = drm_of_find_panel_or_bridge(tcon->dev->of_node, 1, 0,
+ &tcon->panel, &bridge);
+ if (ret) {
dev_info(drm->dev, "No panel or bridge found... RGB output disabled\n");
return 0;
}
@@ -240,7 +241,7 @@ int sun4i_rgb_init(struct drm_device *drm)
/* The RGB encoder can only work with the TCON channel 0 */
rgb->encoder.possible_crtcs = BIT(0);
- if (!IS_ERR(tcon->panel)) {
+ if (tcon->panel) {
drm_connector_helper_add(&rgb->connector,
&sun4i_rgb_con_helper_funcs);
ret = drm_connector_init(drm, &rgb->connector,
@@ -261,7 +262,7 @@ int sun4i_rgb_init(struct drm_device *drm)
}
}
- if (!IS_ERR(bridge)) {
+ if (bridge) {
ret = drm_bridge_attach(encoder, bridge, NULL);
if (ret) {
dev_err(drm->dev, "Couldn't attach our bridge\n");
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index ea2906f87cb91f3ca5a8ced1261da19bc9bbca02..2e4e365cecf9f506823fae7fe3bcb4c94863b3ea 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -15,13 +15,12 @@
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_modes.h>
-#include <drm/drm_panel.h>
+#include <drm/drm_of.h>
#include <linux/component.h>
#include <linux/ioport.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
-#include <linux/of_graph.h>
#include <linux/of_irq.h>
#include <linux/regmap.h>
#include <linux/reset.h>
@@ -405,74 +404,6 @@ static int sun4i_tcon_init_regmap(struct device *dev,
return 0;
}
-struct drm_panel *sun4i_tcon_find_panel(struct device_node *node)
-{
- struct device_node *port, *remote, *child;
- struct device_node *end_node = NULL;
-
- /* Inputs are listed first, then outputs */
- port = of_graph_get_port_by_id(node, 1);
-
- /*
- * Our first output is the RGB interface where the panel will
- * be connected.
- */
- for_each_child_of_node(port, child) {
- u32 reg;
-
- of_property_read_u32(child, "reg", ®);
- if (reg == 0)
- end_node = child;
- }
-
- if (!end_node) {
- DRM_DEBUG_DRIVER("Missing panel endpoint\n");
- return ERR_PTR(-ENODEV);
- }
-
- remote = of_graph_get_remote_port_parent(end_node);
- if (!remote) {
- DRM_DEBUG_DRIVER("Unable to parse remote node\n");
- return ERR_PTR(-EINVAL);
- }
-
- return of_drm_find_panel(remote) ?: ERR_PTR(-EPROBE_DEFER);
-}
-
-struct drm_bridge *sun4i_tcon_find_bridge(struct device_node *node)
-{
- struct device_node *port, *remote, *child;
- struct device_node *end_node = NULL;
-
- /* Inputs are listed first, then outputs */
- port = of_graph_get_port_by_id(node, 1);
-
- /*
- * Our first output is the RGB interface where the panel will
- * be connected.
- */
- for_each_child_of_node(port, child) {
- u32 reg;
-
- of_property_read_u32(child, "reg", ®);
- if (reg == 0)
- end_node = child;
- }
-
- if (!end_node) {
- DRM_DEBUG_DRIVER("Missing bridge endpoint\n");
- return ERR_PTR(-ENODEV);
- }
-
- remote = of_graph_get_remote_port_parent(end_node);
- if (!remote) {
- DRM_DEBUG_DRIVER("Enable to parse remote node\n");
- return ERR_PTR(-EINVAL);
- }
-
- return of_drm_find_bridge(remote) ?: ERR_PTR(-EPROBE_DEFER);
-}
-
static int sun4i_tcon_bind(struct device *dev, struct device *master,
void *data)
{
@@ -555,22 +486,11 @@ static int sun4i_tcon_probe(struct platform_device *pdev)
struct device_node *node = pdev->dev.of_node;
struct drm_bridge *bridge;
struct drm_panel *panel;
+ int ret;
- /*
- * Neither the bridge or the panel is ready.
- * Defer the probe.
- */
- panel = sun4i_tcon_find_panel(node);
- bridge = sun4i_tcon_find_bridge(node);
-
- /*
- * If we don't have a panel endpoint, just go on
- */
- if ((PTR_ERR(panel) == -EPROBE_DEFER) &&
- (PTR_ERR(bridge) == -EPROBE_DEFER)) {
- DRM_DEBUG_DRIVER("Still waiting for our panel/bridge. Deferring...\n");
- return -EPROBE_DEFER;
- }
+ ret = drm_of_find_panel_or_bridge(node, 1, 0, &panel, &bridge);
+ if (ret == -EPROBE_DEFER)
+ return ret;
return component_add(&pdev->dev, &sun4i_tcon_ops);
}