[PATCH v2 resend 0/4] of: replace of_graph_get_next_endpoint()

[PATCH v2 resend 0/4] of: replace of_graph_get_next_endpoint()

[Kuninori Morimoto]

Hi Rob

This is resend v2 of replace of_graph_get_next_endpoint()

We should get rid of or minimize of_graph_get_next_endpoint() in
its current form. In general, drivers should be asking for a specific 
port number because their function is fixed in the binding.

	https://lore.kernel.org/r/20240131184347.GA1906672-robh@kernel.org

This patch-set replace of_graph_get_next_endpoint() by
of_graph_get_endpoint_by_regs(). There are still next_endpoint()
after this patch-set, but it will be replaced by
for_each_endpoint_of_node() in next patch-set (A)

[*] this patch-set
[o] done

	[o] tidyup of_graph_get_endpoint_count()
	[*] replace endpoint func - use endpoint_by_regs()
(A)	[ ] replace endpoint func - use for_each()
	[ ] rename endpoint func to device_endpoint
	[ ] add new port function
	[ ] add new endpont function
	[ ] remove of_graph_get_next_device_endpoint()

v1 -> v2
	- add Reviewed-by from Launrent
	- use by_regs(xx, -1, -1) for some devices
	- add extra explain for drm_of_get_dsi_bus()
	- add FIXME and Link on adv7604.c
	- based on latest of branch

Kuninori Morimoto (4):
  gpu: drm: replace of_graph_get_next_endpoint()
  media: i2c: replace of_graph_get_next_endpoint()
  media: platform: replace of_graph_get_next_endpoint()
  video: fbdev: replace of_graph_get_next_endpoint()

 drivers/gpu/drm/drm_of.c                      |  4 +++-
 .../drm/panel/panel-raspberrypi-touchscreen.c |  2 +-
 drivers/gpu/drm/tiny/arcpgu.c                 |  2 +-
 drivers/media/i2c/adv7343.c                   |  2 +-
 drivers/media/i2c/adv7604.c                   |  4 ++--
 drivers/media/i2c/mt9p031.c                   |  2 +-
 drivers/media/i2c/mt9v032.c                   |  2 +-
 drivers/media/i2c/ov2659.c                    |  2 +-
 drivers/media/i2c/ov5645.c                    |  2 +-
 drivers/media/i2c/ov5647.c                    |  2 +-
 drivers/media/i2c/s5c73m3/s5c73m3-core.c      |  2 +-
 drivers/media/i2c/s5k5baf.c                   |  2 +-
 drivers/media/i2c/tc358743.c                  |  2 +-
 drivers/media/i2c/tda1997x.c                  |  2 +-
 drivers/media/i2c/tvp514x.c                   |  2 +-
 drivers/media/i2c/tvp7002.c                   |  2 +-
 drivers/media/platform/atmel/atmel-isi.c      |  4 ++--
 drivers/media/platform/intel/pxa_camera.c     |  2 +-
 .../platform/samsung/exynos4-is/fimc-is.c     |  2 +-
 .../platform/samsung/exynos4-is/mipi-csis.c   |  3 ++-
 drivers/media/platform/st/stm32/stm32-dcmi.c  |  4 ++--
 drivers/media/platform/ti/davinci/vpif.c      |  3 +--
 drivers/video/fbdev/omap2/omapfb/dss/dsi.c    |  3 ++-
 drivers/video/fbdev/omap2/omapfb/dss/dss-of.c | 20 +------------------
 drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c  |  3 ++-
 drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c  |  3 ++-
 drivers/video/fbdev/omap2/omapfb/dss/venc.c   |  3 ++-
 drivers/video/fbdev/pxafb.c                   |  2 +-
 include/video/omapfb_dss.h                    |  3 ---
 29 files changed, 38 insertions(+), 53 deletions(-)

-- 
2.25.1

[PATCH v2 resend 1/4] gpu: drm: replace of_graph_get_next_endpoint()

[Kuninori Morimoto]

From DT point of view, in general, drivers should be asking for a
specific port number because their function is fixed in the binding.

of_graph_get_next_endpoint() doesn't match to this concept.

Simply replace

	- of_graph_get_next_endpoint(xxx, NULL);
	+ of_graph_get_endpoint_by_regs(xxx, 0, -1);

Link: https://lore.kernel.org/r/20240202174941.GA310089-robh@kernel.org
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/gpu/drm/drm_of.c                              | 4 +++-
 drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 2 +-
 drivers/gpu/drm/tiny/arcpgu.c                         | 2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c
index 177b600895d3..b6b2cade69ae 100644
--- a/drivers/gpu/drm/drm_of.c
+++ b/drivers/gpu/drm/drm_of.c
@@ -504,6 +504,8 @@ EXPORT_SYMBOL_GPL(drm_of_get_data_lanes_count_ep);
  * Gets parent DSI bus for a DSI device controlled through a bus other
  * than MIPI-DCS (SPI, I2C, etc.) using the Device Tree.
  *
+ * This function assumes that the device's port@0 is the DSI input.
+ *
  * Returns pointer to mipi_dsi_host if successful, -EINVAL if the
  * request is unsupported, -EPROBE_DEFER if the DSI host is found but
  * not available, or -ENODEV otherwise.
@@ -516,7 +518,7 @@ struct mipi_dsi_host *drm_of_get_dsi_bus(struct device *dev)
 	/*
 	 * Get first endpoint child from device.
 	 */
-	endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
+	endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
 	if (!endpoint)
 		return ERR_PTR(-ENODEV);
 
diff --git a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
index 4618c892cdd6..e10e469aa7a6 100644
--- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
+++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
@@ -400,7 +400,7 @@ static int rpi_touchscreen_probe(struct i2c_client *i2c)
 	rpi_touchscreen_i2c_write(ts, REG_POWERON, 0);
 
 	/* Look up the DSI host.  It needs to probe before we do. */
-	endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
+	endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
 	if (!endpoint)
 		return -ENODEV;
 
diff --git a/drivers/gpu/drm/tiny/arcpgu.c b/drivers/gpu/drm/tiny/arcpgu.c
index 4f8f3172379e..8c29b719ea62 100644
--- a/drivers/gpu/drm/tiny/arcpgu.c
+++ b/drivers/gpu/drm/tiny/arcpgu.c
@@ -288,7 +288,7 @@ static int arcpgu_load(struct arcpgu_drm_private *arcpgu)
 	 * There is only one output port inside each device. It is linked with
 	 * encoder endpoint.
 	 */
-	endpoint_node = of_graph_get_next_endpoint(pdev->dev.of_node, NULL);
+	endpoint_node = of_graph_get_endpoint_by_regs(pdev->dev.of_node, 0, -1);
 	if (endpoint_node) {
 		encoder_node = of_graph_get_remote_port_parent(endpoint_node);
 		of_node_put(endpoint_node);
-- 
2.25.1

[PATCH v2 resend 2/4] media: i2c: replace of_graph_get_next_endpoint()

[Kuninori Morimoto]

From DT point of view, in general, drivers should be asking for a
specific port number because their function is fixed in the binding.

of_graph_get_next_endpoint() doesn't match to this concept.

Simply replace

	- of_graph_get_next_endpoint(xxx, NULL);
	+ of_graph_get_endpoint_by_regs(xxx, 0, -1);

Link: https://lore.kernel.org/r/20240202174941.GA310089-robh@kernel.org
Link: https://lore.kernel.org/r/9d1e99b0-892d-4a72-a9b3-886b8ed094b0@xs4all.nl
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 drivers/media/i2c/adv7343.c              | 2 +-
 drivers/media/i2c/adv7604.c              | 4 ++--
 drivers/media/i2c/mt9p031.c              | 2 +-
 drivers/media/i2c/mt9v032.c              | 2 +-
 drivers/media/i2c/ov2659.c               | 2 +-
 drivers/media/i2c/ov5645.c               | 2 +-
 drivers/media/i2c/ov5647.c               | 2 +-
 drivers/media/i2c/s5c73m3/s5c73m3-core.c | 2 +-
 drivers/media/i2c/s5k5baf.c              | 2 +-
 drivers/media/i2c/tc358743.c             | 2 +-
 drivers/media/i2c/tda1997x.c             | 2 +-
 drivers/media/i2c/tvp514x.c              | 2 +-
 drivers/media/i2c/tvp7002.c              | 2 +-
 13 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/drivers/media/i2c/adv7343.c b/drivers/media/i2c/adv7343.c
index ff21cd4744d3..4fbe4e18570e 100644
--- a/drivers/media/i2c/adv7343.c
+++ b/drivers/media/i2c/adv7343.c
@@ -403,7 +403,7 @@ adv7343_get_pdata(struct i2c_client *client)
 	if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
 		return client->dev.platform_data;
 
-	np = of_graph_get_next_endpoint(client->dev.of_node, NULL);
+	np = of_graph_get_endpoint_by_regs(client->dev.of_node, 0, -1);
 	if (!np)
 		return NULL;
 
diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
index 810fa8826f30..319db3e847c4 100644
--- a/drivers/media/i2c/adv7604.c
+++ b/drivers/media/i2c/adv7604.c
@@ -3204,8 +3204,8 @@ static int adv76xx_parse_dt(struct adv76xx_state *state)
 
 	np = state->i2c_clients[ADV76XX_PAGE_IO]->dev.of_node;
 
-	/* Parse the endpoint. */
-	endpoint = of_graph_get_next_endpoint(np, NULL);
+	/* FIXME: Parse the endpoint. */
+	endpoint = of_graph_get_endpoint_by_regs(np, -1, -1);
 	if (!endpoint)
 		return -EINVAL;
 
diff --git a/drivers/media/i2c/mt9p031.c b/drivers/media/i2c/mt9p031.c
index 596200d0248c..f4b481212356 100644
--- a/drivers/media/i2c/mt9p031.c
+++ b/drivers/media/i2c/mt9p031.c
@@ -1078,7 +1078,7 @@ mt9p031_get_pdata(struct i2c_client *client)
 	if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
 		return client->dev.platform_data;
 
-	np = of_graph_get_next_endpoint(client->dev.of_node, NULL);
+	np = of_graph_get_endpoint_by_regs(client->dev.of_node, 0, -1);
 	if (!np)
 		return NULL;
 
diff --git a/drivers/media/i2c/mt9v032.c b/drivers/media/i2c/mt9v032.c
index 3ca76eeae7ff..e9f5c6647f97 100644
--- a/drivers/media/i2c/mt9v032.c
+++ b/drivers/media/i2c/mt9v032.c
@@ -1006,7 +1006,7 @@ mt9v032_get_pdata(struct i2c_client *client)
 	if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
 		return client->dev.platform_data;
 
-	np = of_graph_get_next_endpoint(client->dev.of_node, NULL);
+	np = of_graph_get_endpoint_by_regs(client->dev.of_node, 0, -1);
 	if (!np)
 		return NULL;
 
diff --git a/drivers/media/i2c/ov2659.c b/drivers/media/i2c/ov2659.c
index 1d0ef72a6403..d1653d7431d0 100644
--- a/drivers/media/i2c/ov2659.c
+++ b/drivers/media/i2c/ov2659.c
@@ -1388,7 +1388,7 @@ ov2659_get_pdata(struct i2c_client *client)
 	if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
 		return client->dev.platform_data;
 
-	endpoint = of_graph_get_next_endpoint(client->dev.of_node, NULL);
+	endpoint = of_graph_get_endpoint_by_regs(client->dev.of_node, 0, -1);
 	if (!endpoint)
 		return NULL;
 
diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c
index a26ac11c989d..9daf06ffedf4 100644
--- a/drivers/media/i2c/ov5645.c
+++ b/drivers/media/i2c/ov5645.c
@@ -1056,7 +1056,7 @@ static int ov5645_probe(struct i2c_client *client)
 	ov5645->i2c_client = client;
 	ov5645->dev = dev;
 
-	endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
+	endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
 	if (!endpoint) {
 		dev_err(dev, "endpoint node not found\n");
 		return -EINVAL;
diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c
index 96c0fd4ff5ab..7e1ecdf2485f 100644
--- a/drivers/media/i2c/ov5647.c
+++ b/drivers/media/i2c/ov5647.c
@@ -1363,7 +1363,7 @@ static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np)
 	struct device_node *ep;
 	int ret;
 
-	ep = of_graph_get_next_endpoint(np, NULL);
+	ep = of_graph_get_endpoint_by_regs(np, 0, -1);
 	if (!ep)
 		return -EINVAL;
 
diff --git a/drivers/media/i2c/s5c73m3/s5c73m3-core.c b/drivers/media/i2c/s5c73m3/s5c73m3-core.c
index af8d01f78c32..cf6be509af33 100644
--- a/drivers/media/i2c/s5c73m3/s5c73m3-core.c
+++ b/drivers/media/i2c/s5c73m3/s5c73m3-core.c
@@ -1568,7 +1568,7 @@ static int s5c73m3_get_dt_data(struct s5c73m3 *state)
 				     "failed to request gpio S5C73M3_RST\n");
 	gpiod_set_consumer_name(state->reset, "S5C73M3_RST");
 
-	node_ep = of_graph_get_next_endpoint(node, NULL);
+	node_ep = of_graph_get_endpoint_by_regs(node, 0, -1);
 	if (!node_ep) {
 		dev_warn(dev, "no endpoint defined for node: %pOF\n", node);
 		return 0;
diff --git a/drivers/media/i2c/s5k5baf.c b/drivers/media/i2c/s5k5baf.c
index de079d2c9282..6b11039c3579 100644
--- a/drivers/media/i2c/s5k5baf.c
+++ b/drivers/media/i2c/s5k5baf.c
@@ -1849,7 +1849,7 @@ static int s5k5baf_parse_device_node(struct s5k5baf *state, struct device *dev)
 			 state->mclk_frequency);
 	}
 
-	node_ep = of_graph_get_next_endpoint(node, NULL);
+	node_ep = of_graph_get_endpoint_by_regs(node, 0, -1);
 	if (!node_ep) {
 		dev_err(dev, "no endpoint defined at node %pOF\n", node);
 		return -EINVAL;
diff --git a/drivers/media/i2c/tc358743.c b/drivers/media/i2c/tc358743.c
index 2785935da497..872e802cdfbe 100644
--- a/drivers/media/i2c/tc358743.c
+++ b/drivers/media/i2c/tc358743.c
@@ -1895,7 +1895,7 @@ static int tc358743_probe_of(struct tc358743_state *state)
 		return dev_err_probe(dev, PTR_ERR(refclk),
 				     "failed to get refclk\n");
 
-	ep = of_graph_get_next_endpoint(dev->of_node, NULL);
+	ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
 	if (!ep) {
 		dev_err(dev, "missing endpoint node\n");
 		return -EINVAL;
diff --git a/drivers/media/i2c/tda1997x.c b/drivers/media/i2c/tda1997x.c
index 1ea703a9909f..8e4a0718c4b6 100644
--- a/drivers/media/i2c/tda1997x.c
+++ b/drivers/media/i2c/tda1997x.c
@@ -2310,7 +2310,7 @@ static int tda1997x_parse_dt(struct tda1997x_state *state)
 	pdata->vidout_sel_de = DE_FREF_SEL_DE_VHREF;
 
 	np = state->client->dev.of_node;
-	ep = of_graph_get_next_endpoint(np, NULL);
+	ep = of_graph_get_endpoint_by_regs(np, 0, -1);
 	if (!ep)
 		return -EINVAL;
 
diff --git a/drivers/media/i2c/tvp514x.c b/drivers/media/i2c/tvp514x.c
index 5a561e5bf659..f9c9c80c33ac 100644
--- a/drivers/media/i2c/tvp514x.c
+++ b/drivers/media/i2c/tvp514x.c
@@ -987,7 +987,7 @@ tvp514x_get_pdata(struct i2c_client *client)
 	if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
 		return client->dev.platform_data;
 
-	endpoint = of_graph_get_next_endpoint(client->dev.of_node, NULL);
+	endpoint = of_graph_get_endpoint_by_regs(client->dev.of_node, 0, -1);
 	if (!endpoint)
 		return NULL;
 
diff --git a/drivers/media/i2c/tvp7002.c b/drivers/media/i2c/tvp7002.c
index 30831b4b56d6..6a04ffae5343 100644
--- a/drivers/media/i2c/tvp7002.c
+++ b/drivers/media/i2c/tvp7002.c
@@ -893,7 +893,7 @@ tvp7002_get_pdata(struct i2c_client *client)
 	if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
 		return client->dev.platform_data;
 
-	endpoint = of_graph_get_next_endpoint(client->dev.of_node, NULL);
+	endpoint = of_graph_get_endpoint_by_regs(client->dev.of_node, 0, -1);
 	if (!endpoint)
 		return NULL;
 
-- 
2.25.1

[PATCH v2 resend 3/4] media: platform: replace of_graph_get_next_endpoint()

[Kuninori Morimoto]

From DT point of view, in general, drivers should be asking for a
specific port number because their function is fixed in the binding.

of_graph_get_next_endpoint() doesn't match to this concept.

Simply replace

	- of_graph_get_next_endpoint(xxx, NULL);
	+ of_graph_get_endpoint_by_regs(xxx, 0, -1);

Link: https://lore.kernel.org/r/20240202174941.GA310089-robh@kernel.org
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 drivers/media/platform/atmel/atmel-isi.c              | 4 ++--
 drivers/media/platform/intel/pxa_camera.c             | 2 +-
 drivers/media/platform/samsung/exynos4-is/fimc-is.c   | 2 +-
 drivers/media/platform/samsung/exynos4-is/mipi-csis.c | 3 ++-
 drivers/media/platform/st/stm32/stm32-dcmi.c          | 4 ++--
 drivers/media/platform/ti/davinci/vpif.c              | 3 +--
 6 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/media/platform/atmel/atmel-isi.c b/drivers/media/platform/atmel/atmel-isi.c
index f8450a8ccda6..c1108df72dd5 100644
--- a/drivers/media/platform/atmel/atmel-isi.c
+++ b/drivers/media/platform/atmel/atmel-isi.c
@@ -834,7 +834,7 @@ static int atmel_isi_parse_dt(struct atmel_isi *isi,
 	isi->pdata.full_mode = 1;
 	isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL;
 
-	np = of_graph_get_next_endpoint(np, NULL);
+	np = of_graph_get_endpoint_by_regs(np, 0, -1);
 	if (!np) {
 		dev_err(&pdev->dev, "Could not find the endpoint\n");
 		return -EINVAL;
@@ -1158,7 +1158,7 @@ static int isi_graph_init(struct atmel_isi *isi)
 	struct device_node *ep;
 	int ret;
 
-	ep = of_graph_get_next_endpoint(isi->dev->of_node, NULL);
+	ep = of_graph_get_endpoint_by_regs(isi->dev->of_node, 0, -1);
 	if (!ep)
 		return -EINVAL;
 
diff --git a/drivers/media/platform/intel/pxa_camera.c b/drivers/media/platform/intel/pxa_camera.c
index 59b89e421dc2..d904952bf00e 100644
--- a/drivers/media/platform/intel/pxa_camera.c
+++ b/drivers/media/platform/intel/pxa_camera.c
@@ -2207,7 +2207,7 @@ static int pxa_camera_pdata_from_dt(struct device *dev,
 		pcdev->mclk = mclk_rate;
 	}
 
-	np = of_graph_get_next_endpoint(np, NULL);
+	np = of_graph_get_endpoint_by_regs(np, 0, -1);
 	if (!np) {
 		dev_err(dev, "could not find endpoint\n");
 		return -EINVAL;
diff --git a/drivers/media/platform/samsung/exynos4-is/fimc-is.c b/drivers/media/platform/samsung/exynos4-is/fimc-is.c
index a08c87ef6e2d..39aab667910d 100644
--- a/drivers/media/platform/samsung/exynos4-is/fimc-is.c
+++ b/drivers/media/platform/samsung/exynos4-is/fimc-is.c
@@ -175,7 +175,7 @@ static int fimc_is_parse_sensor_config(struct fimc_is *is, unsigned int index,
 		return -EINVAL;
 	}
 
-	ep = of_graph_get_next_endpoint(node, NULL);
+	ep = of_graph_get_endpoint_by_regs(node, 0, -1);
 	if (!ep)
 		return -ENXIO;
 
diff --git a/drivers/media/platform/samsung/exynos4-is/mipi-csis.c b/drivers/media/platform/samsung/exynos4-is/mipi-csis.c
index aae8a8b2c0f4..4b9b20ba3504 100644
--- a/drivers/media/platform/samsung/exynos4-is/mipi-csis.c
+++ b/drivers/media/platform/samsung/exynos4-is/mipi-csis.c
@@ -727,7 +727,8 @@ static int s5pcsis_parse_dt(struct platform_device *pdev,
 				 &state->max_num_lanes))
 		return -EINVAL;
 
-	node = of_graph_get_next_endpoint(node, NULL);
+	/* from port@3 or port@4 */
+	node = of_graph_get_endpoint_by_regs(node, -1, -1);
 	if (!node) {
 		dev_err(&pdev->dev, "No port node at %pOF\n",
 				pdev->dev.of_node);
diff --git a/drivers/media/platform/st/stm32/stm32-dcmi.c b/drivers/media/platform/st/stm32/stm32-dcmi.c
index c4610e305546..ff3331af9406 100644
--- a/drivers/media/platform/st/stm32/stm32-dcmi.c
+++ b/drivers/media/platform/st/stm32/stm32-dcmi.c
@@ -1855,7 +1855,7 @@ static int dcmi_graph_init(struct stm32_dcmi *dcmi)
 	struct device_node *ep;
 	int ret;
 
-	ep = of_graph_get_next_endpoint(dcmi->dev->of_node, NULL);
+	ep = of_graph_get_endpoint_by_regs(dcmi->dev->of_node, 0, -1);
 	if (!ep) {
 		dev_err(dcmi->dev, "Failed to get next endpoint\n");
 		return -EINVAL;
@@ -1907,7 +1907,7 @@ static int dcmi_probe(struct platform_device *pdev)
 				     "Could not get reset control\n");
 
 	/* Get bus characteristics from devicetree */
-	np = of_graph_get_next_endpoint(np, NULL);
+	np = of_graph_get_endpoint_by_regs(np, 0, -1);
 	if (!np) {
 		dev_err(&pdev->dev, "Could not find the endpoint\n");
 		return -ENODEV;
diff --git a/drivers/media/platform/ti/davinci/vpif.c b/drivers/media/platform/ti/davinci/vpif.c
index 63cdfed37bc9..f4e1fa76bf37 100644
--- a/drivers/media/platform/ti/davinci/vpif.c
+++ b/drivers/media/platform/ti/davinci/vpif.c
@@ -465,8 +465,7 @@ static int vpif_probe(struct platform_device *pdev)
 	 * so their devices need to be registered manually here
 	 * for their legacy platform_drivers to work.
 	 */
-	endpoint = of_graph_get_next_endpoint(pdev->dev.of_node,
-					      endpoint);
+	endpoint = of_graph_get_endpoint_by_regs(pdev->dev.of_node, 0, -1);
 	if (!endpoint)
 		return 0;
 	of_node_put(endpoint);
-- 
2.25.1

[PATCH v2 resend 4/4] video: fbdev: replace of_graph_get_next_endpoint()

[Kuninori Morimoto]

From DT point of view, in general, drivers should be asking for a
specific port number because their function is fixed in the binding.

of_graph_get_next_endpoint() doesn't match to this concept.

Simply replace

	- of_graph_get_next_endpoint(xxx, NULL);
	+ of_graph_get_endpoint_by_regs(xxx, 0, -1);

Link: https://lore.kernel.org/r/20240202174941.GA310089-robh@kernel.org
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/video/fbdev/omap2/omapfb/dss/dsi.c    |  3 ++-
 drivers/video/fbdev/omap2/omapfb/dss/dss-of.c | 20 +------------------
 drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c  |  3 ++-
 drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c  |  3 ++-
 drivers/video/fbdev/omap2/omapfb/dss/venc.c   |  3 ++-
 drivers/video/fbdev/pxafb.c                   |  2 +-
 include/video/omapfb_dss.h                    |  3 ---
 7 files changed, 10 insertions(+), 27 deletions(-)

diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dsi.c b/drivers/video/fbdev/omap2/omapfb/dss/dsi.c
index b7eb17a16ec4..1f13bcf73da5 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/dsi.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/dsi.c
@@ -28,6 +28,7 @@
 #include <linux/debugfs.h>
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <linux/of_platform.h>
 #include <linux/component.h>
 
@@ -5079,7 +5080,7 @@ static int dsi_probe_of(struct platform_device *pdev)
 	struct device_node *ep;
 	struct omap_dsi_pin_config pin_cfg;
 
-	ep = omapdss_of_get_first_endpoint(node);
+	ep = of_graph_get_endpoint_by_regs(node, 0, -1);
 	if (!ep)
 		return 0;
 
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dss-of.c b/drivers/video/fbdev/omap2/omapfb/dss/dss-of.c
index 0282d4eef139..14965a3fd05b 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/dss-of.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/dss-of.c
@@ -130,24 +130,6 @@ static struct device_node *omapdss_of_get_remote_port(const struct device_node *
 	return np;
 }
 
-struct device_node *
-omapdss_of_get_first_endpoint(const struct device_node *parent)
-{
-	struct device_node *port, *ep;
-
-	port = omapdss_of_get_next_port(parent, NULL);
-
-	if (!port)
-		return NULL;
-
-	ep = omapdss_of_get_next_endpoint(port, NULL);
-
-	of_node_put(port);
-
-	return ep;
-}
-EXPORT_SYMBOL_GPL(omapdss_of_get_first_endpoint);
-
 struct omap_dss_device *
 omapdss_of_find_source_for_first_ep(struct device_node *node)
 {
@@ -155,7 +137,7 @@ omapdss_of_find_source_for_first_ep(struct device_node *node)
 	struct device_node *src_port;
 	struct omap_dss_device *src;
 
-	ep = omapdss_of_get_first_endpoint(node);
+	ep = of_graph_get_endpoint_by_regs(node, 0, -1);
 	if (!ep)
 		return ERR_PTR(-EINVAL);
 
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c b/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c
index f05b4e35a842..8f407ec134dc 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c
@@ -20,6 +20,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/clk.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <linux/regulator/consumer.h>
 #include <linux/component.h>
 #include <video/omapfb_dss.h>
@@ -529,7 +530,7 @@ static int hdmi_probe_of(struct platform_device *pdev)
 	struct device_node *ep;
 	int r;
 
-	ep = omapdss_of_get_first_endpoint(node);
+	ep = of_graph_get_endpoint_by_regs(node, 0, -1);
 	if (!ep)
 		return 0;
 
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c b/drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c
index 03292945b1d4..4ad219f522b9 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/hdmi5.c
@@ -25,6 +25,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/clk.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <linux/regulator/consumer.h>
 #include <linux/component.h>
 #include <video/omapfb_dss.h>
@@ -561,7 +562,7 @@ static int hdmi_probe_of(struct platform_device *pdev)
 	struct device_node *ep;
 	int r;
 
-	ep = omapdss_of_get_first_endpoint(node);
+	ep = of_graph_get_endpoint_by_regs(node, 0, -1);
 	if (!ep)
 		return 0;
 
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/venc.c b/drivers/video/fbdev/omap2/omapfb/dss/venc.c
index c9d40e28a06f..0bd80d3b8f1b 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/venc.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/venc.c
@@ -24,6 +24,7 @@
 #include <linux/regulator/consumer.h>
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <linux/component.h>
 
 #include <video/omapfb_dss.h>
@@ -764,7 +765,7 @@ static int venc_probe_of(struct platform_device *pdev)
 	u32 channels;
 	int r;
 
-	ep = omapdss_of_get_first_endpoint(node);
+	ep = of_graph_get_endpoint_by_regs(node, 0, -1);
 	if (!ep)
 		return 0;
 
diff --git a/drivers/video/fbdev/pxafb.c b/drivers/video/fbdev/pxafb.c
index fa943612c4e2..2ef56fa28aff 100644
--- a/drivers/video/fbdev/pxafb.c
+++ b/drivers/video/fbdev/pxafb.c
@@ -2171,7 +2171,7 @@ static int of_get_pxafb_mode_info(struct device *dev,
 	u32 bus_width;
 	int ret, i;
 
-	np = of_graph_get_next_endpoint(dev->of_node, NULL);
+	np = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);
 	if (!np) {
 		dev_err(dev, "could not find endpoint\n");
 		return -EINVAL;
diff --git a/include/video/omapfb_dss.h b/include/video/omapfb_dss.h
index e8eaac2cb7b8..a8c0c3eeeb5b 100644
--- a/include/video/omapfb_dss.h
+++ b/include/video/omapfb_dss.h
@@ -819,9 +819,6 @@ struct device_node *
 omapdss_of_get_next_endpoint(const struct device_node *parent,
 			     struct device_node *prev);
 
-struct device_node *
-omapdss_of_get_first_endpoint(const struct device_node *parent);
-
 struct omap_dss_device *
 omapdss_of_find_source_for_first_ep(struct device_node *node);
 #else
-- 
2.25.1

Re: [PATCH v2 resend 0/4] of: replace of_graph_get_next_endpoint()

[Kuninori Morimoto]

Hi Rob

> This is resend v2 of replace of_graph_get_next_endpoint()
> 
> We should get rid of or minimize of_graph_get_next_endpoint() in
> its current form. In general, drivers should be asking for a specific 
> port number because their function is fixed in the binding.
> 
> 	https://lore.kernel.org/r/20240131184347.GA1906672-robh@kernel.org
> 
> This patch-set replace of_graph_get_next_endpoint() by
> of_graph_get_endpoint_by_regs(). There are still next_endpoint()
> after this patch-set, but it will be replaced by
> for_each_endpoint_of_node() in next patch-set (A)
> 
> [*] this patch-set
> [o] done
> 
> 	[o] tidyup of_graph_get_endpoint_count()
> 	[*] replace endpoint func - use endpoint_by_regs()
> (A)	[ ] replace endpoint func - use for_each()
> 	[ ] rename endpoint func to device_endpoint
> 	[ ] add new port function
> 	[ ] add new endpont function
> 	[ ] remove of_graph_get_next_device_endpoint()
> 
> v1 -> v2
> 	- add Reviewed-by from Launrent
> 	- use by_regs(xx, -1, -1) for some devices
> 	- add extra explain for drm_of_get_dsi_bus()
> 	- add FIXME and Link on adv7604.c
> 	- based on latest of branch
> 
> Kuninori Morimoto (4):
>   gpu: drm: replace of_graph_get_next_endpoint()
>   media: i2c: replace of_graph_get_next_endpoint()
>   media: platform: replace of_graph_get_next_endpoint()
>   video: fbdev: replace of_graph_get_next_endpoint()

I wonder who should handle this patch-set ??
I'm posting these as part of "of patch-set" (= to Rob)
but does these should be handled by each driver maintainer ?
(I believe all maintainers are listed on To)

Thank you for your help !!

Best regards
---
Renesas Electronics
Ph.D. Kuninori Morimoto