drm/tilcdc: Remove component framework support

The tilcdc driver previously used the component framework to bind
external encoder subdrivers (specifically the TDA998x HDMI encoder).
With the removal of these subdrivers in previous commits, the component
framework is no longer needed.

This commit removes all component framework infrastructure including:
- Component master operations and bind/unbind callbacks
- The is_componentized flag and conditional code paths
- tilcdc_get_external_components() and tilcdc_add_component_encoder()
- TDA998x-specific panel configuration

The driver now uses a simplified initialization path that directly
attaches external devices via the DRM bridge API, eliminating the
complexity of dual code paths for componentized vs non-componentized
configurations.

This cleanup removes approximately 140 lines of code and makes the
driver initialization flow more straightforward.

Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Kory Maincent (TI.com) <kory.maincent@bootlin.com>
Link: https://patch.msgid.link/20260123-feature_tilcdc-v5-7-5a44d2aa3f6f@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

drivers/gpu/drm/tilcdc/tilcdc_crtc.c

@@ -1021,16 +1021,6 @@ int tilcdc_crtc_create(struct drm_device *dev)
 
 	drm_crtc_helper_add(crtc, &tilcdc_crtc_helper_funcs);
 
-	if (priv->is_componentized) {
-		crtc->port = of_graph_get_port_by_id(dev->dev->of_node, 0);
-		if (!crtc->port) { /* This should never happen */
-			dev_err(dev->dev, "Port node not found in %pOF\n",
-				dev->dev->of_node);
-			ret = -EINVAL;
-			goto fail;
-		}
-	}
-
 	priv->crtc = crtc;
 	return 0;
 

drivers/gpu/drm/tilcdc/tilcdc_drv.c

@@ -6,7 +6,6 @@
 
 /* LCDC DRM driver, based on da8xx-fb */
 
-#include <linux/component.h>
 #include <linux/mod_devicetable.h>
 #include <linux/module.h>
 #include <linux/pinctrl/consumer.h>
@@ -220,9 +219,6 @@ static int tilcdc_init(const struct drm_driver *ddrv, struct device *dev)
 	platform_set_drvdata(pdev, ddev);
 	drm_mode_config_init(ddev);
 
-	priv->is_componentized =
-		tilcdc_get_external_components(dev, NULL) > 0;
-
 	priv->wq = alloc_ordered_workqueue("tilcdc", 0);
 	if (!priv->wq) {
 		ret = -ENOMEM;
@@ -339,42 +335,32 @@ static int tilcdc_init(const struct drm_driver *ddrv, struct device *dev)
 	}
 #endif
 
-	if (priv->is_componentized) {
-		ret = component_bind_all(dev, ddev);
-		if (ret < 0)
-			goto unregister_cpufreq_notif;
-
-		ret = tilcdc_add_component_encoder(ddev);
-		if (ret < 0)
-			goto unbind_component;
-	} else {
-		ret = tilcdc_attach_external_device(ddev);
-		if (ret)
-			goto unregister_cpufreq_notif;
-	}
+	ret = tilcdc_attach_external_device(ddev);
+	if (ret)
+		goto unregister_cpufreq_notif;
 
 	if (!priv->external_connector &&
 	    ((priv->num_encoders == 0) || (priv->num_connectors == 0))) {
 		dev_err(dev, "no encoders/connectors found\n");
 		ret = -EPROBE_DEFER;
-		goto unbind_component;
+		goto unregister_cpufreq_notif;
 	}
 
 	ret = drm_vblank_init(ddev, 1);
 	if (ret < 0) {
 		dev_err(dev, "failed to initialize vblank\n");
-		goto unbind_component;
+		goto unregister_cpufreq_notif;
 	}
 
 	ret = platform_get_irq(pdev, 0);
 	if (ret < 0)
-		goto unbind_component;
+		goto unregister_cpufreq_notif;
 	priv->irq = ret;
 
 	ret = tilcdc_irq_install(ddev, priv->irq);
 	if (ret < 0) {
 		dev_err(dev, "failed to install IRQ handler\n");
-		goto unbind_component;
+		goto unregister_cpufreq_notif;
 	}
 
 	drm_mode_config_reset(ddev);
@@ -392,9 +378,6 @@ static int tilcdc_init(const struct drm_driver *ddrv, struct device *dev)
 stop_poll:
 	drm_kms_helper_poll_fini(ddev);
 	tilcdc_irq_uninstall(ddev);
-unbind_component:
-	if (priv->is_componentized)
-		component_unbind_all(dev, ddev);
 unregister_cpufreq_notif:
 #ifdef CONFIG_CPU_FREQ
 	cpufreq_unregister_notifier(&priv->freq_transition,
@@ -543,65 +526,20 @@ static int tilcdc_pm_resume(struct device *dev)
 static DEFINE_SIMPLE_DEV_PM_OPS(tilcdc_pm_ops,
 				tilcdc_pm_suspend, tilcdc_pm_resume);
 
-/*
- * Platform driver:
- */
-static int tilcdc_bind(struct device *dev)
-{
-	return tilcdc_init(&tilcdc_driver, dev);
-}
-
-static void tilcdc_unbind(struct device *dev)
-{
-	struct drm_device *ddev = dev_get_drvdata(dev);
-
-	/* Check if a subcomponent has already triggered the unloading. */
-	if (!ddev->dev_private)
-		return;
-
-	tilcdc_fini(ddev);
-	dev_set_drvdata(dev, NULL);
-}
-
-static const struct component_master_ops tilcdc_comp_ops = {
-	.bind = tilcdc_bind,
-	.unbind = tilcdc_unbind,
-};
-
 static int tilcdc_pdev_probe(struct platform_device *pdev)
 {
-	struct component_match *match = NULL;
-	int ret;
-
 	/* bail out early if no DT data: */
 	if (!pdev->dev.of_node) {
 		dev_err(&pdev->dev, "device-tree data is missing\n");
 		return -ENXIO;
 	}
 
-	ret = tilcdc_get_external_components(&pdev->dev, &match);
-	if (ret < 0)
-		return ret;
-	else if (ret == 0)
-		return tilcdc_init(&tilcdc_driver, &pdev->dev);
-	else
-		return component_master_add_with_match(&pdev->dev,
-						       &tilcdc_comp_ops,
-						       match);
+	return tilcdc_init(&tilcdc_driver, &pdev->dev);
 }
 
 static void tilcdc_pdev_remove(struct platform_device *pdev)
 {
-	int ret;
-
-	ret = tilcdc_get_external_components(&pdev->dev, NULL);
-	if (ret < 0)
-		dev_err(&pdev->dev, "tilcdc_get_external_components() failed (%pe)\n",
-			ERR_PTR(ret));
-	else if (ret == 0)
-		tilcdc_fini(platform_get_drvdata(pdev));
-	else
-		component_master_del(&pdev->dev, &tilcdc_comp_ops);
+	tilcdc_fini(platform_get_drvdata(pdev));
 }
 
 static void tilcdc_pdev_shutdown(struct platform_device *pdev)

drivers/gpu/drm/tilcdc/tilcdc_drv.h

@@ -84,7 +84,6 @@ struct tilcdc_drm_private {
 	struct drm_encoder *external_encoder;
 	struct drm_connector *external_connector;
 
-	bool is_componentized;
 	bool irq_enabled;
 };
 

drivers/gpu/drm/tilcdc/tilcdc_external.c

@@ -4,7 +4,6 @@
  * Author: Jyri Sarha <jsarha@ti.com>
  */
 
-#include <linux/component.h>
 #include <linux/of_graph.h>
 
 #include <drm/drm_atomic_helper.h>
@@ -15,19 +14,6 @@
 #include "tilcdc_drv.h"
 #include "tilcdc_external.h"
 
-static const struct tilcdc_panel_info panel_info_tda998x = {
-		.ac_bias                = 255,
-		.ac_bias_intrpt         = 0,
-		.dma_burst_sz           = 16,
-		.bpp                    = 16,
-		.fdd                    = 0x80,
-		.tft_alt_mode           = 0,
-		.invert_pxl_clk		= 1,
-		.sync_edge              = 1,
-		.sync_ctrl              = 1,
-		.raster_order           = 0,
-};
-
 static const struct tilcdc_panel_info panel_info_default = {
 		.ac_bias                = 255,
 		.ac_bias_intrpt         = 0,
@@ -57,34 +43,6 @@ struct drm_connector *tilcdc_encoder_find_connector(struct drm_device *ddev,
 	return NULL;
 }
 
-int tilcdc_add_component_encoder(struct drm_device *ddev)
-{
-	struct tilcdc_drm_private *priv = ddev->dev_private;
-	struct drm_encoder *encoder = NULL, *iter;
-
-	list_for_each_entry(iter, &ddev->mode_config.encoder_list, head)
-		if (iter->possible_crtcs & (1 << priv->crtc->index)) {
-			encoder = iter;
-			break;
-		}
-
-	if (!encoder) {
-		dev_err(ddev->dev, "%s: No suitable encoder found\n", __func__);
-		return -ENODEV;
-	}
-
-	priv->external_connector =
-		tilcdc_encoder_find_connector(ddev, encoder);
-
-	if (!priv->external_connector)
-		return -ENODEV;
-
-	/* Only tda998x is supported at the moment. */
-	tilcdc_crtc_set_panel_info(priv->crtc, &panel_info_tda998x);
-
-	return 0;
-}
-
 static
 int tilcdc_attach_bridge(struct drm_device *ddev, struct drm_bridge *bridge)
 {
@@ -153,26 +111,3 @@ int tilcdc_attach_external_device(struct drm_device *ddev)
 	drm_encoder_cleanup(priv->external_encoder);
 	return ret;
 }
-
-static int dev_match_of(struct device *dev, void *data)
-{
-	return dev->of_node == data;
-}
-
-int tilcdc_get_external_components(struct device *dev,
-				   struct component_match **match)
-{
-	struct device_node *node;
-
-	node = of_graph_get_remote_node(dev->of_node, 0, 0);
-
-	if (!of_device_is_compatible(node, "nxp,tda998x")) {
-		of_node_put(node);
-		return 0;
-	}
-
-	if (match)
-		drm_of_component_match_add(dev, match, dev_match_of, node);
-	of_node_put(node);
-	return 1;
-}

drivers/gpu/drm/tilcdc/tilcdc_external.h

@@ -7,8 +7,5 @@
 #ifndef __TILCDC_EXTERNAL_H__
 #define __TILCDC_EXTERNAL_H__
 
-int tilcdc_add_component_encoder(struct drm_device *dev);
-int tilcdc_get_external_components(struct device *dev,
-				   struct component_match **match);
 int tilcdc_attach_external_device(struct drm_device *ddev);
 #endif /* __TILCDC_SLAVE_H__ */