Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 179 insertions, 0 deletions

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_external.c b/drivers/gpu/drm/tilcdc/tilcdc_external.c
new file mode 100644
index 000000000..3b86d002e
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_external.c
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2015 Texas Instruments
+ * Author: Jyri Sarha <jsarha@ti.com>
+ */
+
+#include <linux/component.h>
+#include <linux/of_graph.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_of.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#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,
+		.dma_burst_sz           = 16,
+		.bpp                    = 16,
+		.fdd                    = 0x80,
+		.tft_alt_mode           = 0,
+		.sync_edge              = 0,
+		.sync_ctrl              = 1,
+		.raster_order           = 0,
+};
+
+static
+struct drm_connector *tilcdc_encoder_find_connector(struct drm_device *ddev,
+						    struct drm_encoder *encoder)
+{
+	struct drm_connector *connector;
+
+	list_for_each_entry(connector, &ddev->mode_config.connector_list, head) {
+		if (drm_connector_has_possible_encoder(connector, encoder))
+			return connector;
+	}
+
+	dev_err(ddev->dev, "No connector found for %s encoder (id %d)\n",
+		encoder->name, encoder->base.id);
+
+	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_simulate_vesa_sync(priv->crtc, true);
+	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)
+{
+	struct tilcdc_drm_private *priv = ddev->dev_private;
+	int ret;
+
+	priv->external_encoder->possible_crtcs = BIT(0);
+
+	ret = drm_bridge_attach(priv->external_encoder, bridge, NULL, 0);
+	if (ret)
+		return ret;
+
+	tilcdc_crtc_set_panel_info(priv->crtc, &panel_info_default);
+
+	priv->external_connector =
+		tilcdc_encoder_find_connector(ddev, priv->external_encoder);
+	if (!priv->external_connector)
+		return -ENODEV;
+
+	return 0;
+}
+
+int tilcdc_attach_external_device(struct drm_device *ddev)
+{
+	struct tilcdc_drm_private *priv = ddev->dev_private;
+	struct drm_bridge *bridge;
+	struct drm_panel *panel;
+	int ret;
+
+	ret = drm_of_find_panel_or_bridge(ddev->dev->of_node, 0, 0,
+					  &panel, &bridge);
+	if (ret == -ENODEV)
+		return 0;
+	else if (ret)
+		return ret;
+
+	priv->external_encoder = devm_kzalloc(ddev->dev,
+					      sizeof(*priv->external_encoder),
+					      GFP_KERNEL);
+	if (!priv->external_encoder)
+		return -ENOMEM;
+
+	ret = drm_simple_encoder_init(ddev, priv->external_encoder,
+				      DRM_MODE_ENCODER_NONE);
+	if (ret) {
+		dev_err(ddev->dev, "drm_encoder_init() failed %d\n", ret);
+		return ret;
+	}
+
+	if (panel) {
+		bridge = devm_drm_panel_bridge_add_typed(ddev->dev, panel,
+							 DRM_MODE_CONNECTOR_DPI);
+		if (IS_ERR(bridge)) {
+			ret = PTR_ERR(bridge);
+			goto err_encoder_cleanup;
+		}
+	}
+
+	ret = tilcdc_attach_bridge(ddev, bridge);
+	if (ret)
+		goto err_encoder_cleanup;
+
+	return 0;
+
+err_encoder_cleanup:
+	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;
+}