Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 167 insertions, 0 deletions

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
new file mode 100644
index 000000000..2298ed2a9
--- /dev/null
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * Freescale DCU drm device driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/backlight.h>
+#include <linux/of_graph.h>
+
+#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"
+#include "fsl_tcon.h"
+
+static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder)
+{
+	drm_encoder_cleanup(encoder);
+}
+
+static const struct drm_encoder_funcs encoder_funcs = {
+	.destroy = fsl_dcu_drm_encoder_destroy,
+};
+
+int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
+			       struct drm_crtc *crtc)
+{
+	struct drm_encoder *encoder = &fsl_dev->encoder;
+	int ret;
+
+	encoder->possible_crtcs = 1;
+
+	/* Use bypass mode for parallel RGB/LVDS encoder */
+	if (fsl_dev->tcon)
+		fsl_tcon_bypass_enable(fsl_dev->tcon);
+
+	ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
+			       DRM_MODE_ENCODER_LVDS, NULL);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
+{
+	struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector);
+
+	drm_connector_unregister(connector);
+	drm_panel_detach(fsl_con->panel);
+	drm_connector_cleanup(connector);
+}
+
+static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+	.destroy = fsl_dcu_drm_connector_destroy,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.reset = drm_atomic_helper_connector_reset,
+};
+
+static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
+{
+	struct fsl_dcu_drm_connector *fsl_connector;
+	int (*get_modes)(struct drm_panel *panel);
+	int num_modes = 0;
+
+	fsl_connector = to_fsl_dcu_connector(connector);
+	if (fsl_connector->panel && fsl_connector->panel->funcs &&
+	    fsl_connector->panel->funcs->get_modes) {
+		get_modes = fsl_connector->panel->funcs->get_modes;
+		num_modes = get_modes(fsl_connector->panel);
+	}
+
+	return num_modes;
+}
+
+static int fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
+					    struct drm_display_mode *mode)
+{
+	if (mode->hdisplay & 0xf)
+		return MODE_ERROR;
+
+	return MODE_OK;
+}
+
+static const struct drm_connector_helper_funcs connector_helper_funcs = {
+	.get_modes = fsl_dcu_drm_connector_get_modes,
+	.mode_valid = fsl_dcu_drm_connector_mode_valid,
+};
+
+static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev,
+				 struct drm_panel *panel)
+{
+	struct drm_encoder *encoder = &fsl_dev->encoder;
+	struct drm_connector *connector = &fsl_dev->connector.base;
+	int ret;
+
+	fsl_dev->connector.encoder = encoder;
+
+	ret = drm_connector_init(fsl_dev->drm, connector,
+				 &fsl_dcu_drm_connector_funcs,
+				 DRM_MODE_CONNECTOR_LVDS);
+	if (ret < 0)
+		return ret;
+
+	drm_connector_helper_add(connector, &connector_helper_funcs);
+	ret = drm_connector_register(connector);
+	if (ret < 0)
+		goto err_cleanup;
+
+	ret = drm_connector_attach_encoder(connector, encoder);
+	if (ret < 0)
+		goto err_sysfs;
+
+	ret = drm_panel_attach(panel, connector);
+	if (ret) {
+		dev_err(fsl_dev->dev, "failed to attach panel\n");
+		goto err_sysfs;
+	}
+
+	return 0;
+
+err_sysfs:
+	drm_connector_unregister(connector);
+err_cleanup:
+	drm_connector_cleanup(connector);
+	return ret;
+}
+
+int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
+{
+	struct device_node *panel_node;
+	struct drm_panel *panel;
+	struct drm_bridge *bridge;
+	int ret;
+
+	/* This is for backward compatibility */
+	panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
+	if (panel_node) {
+		fsl_dev->connector.panel = of_drm_find_panel(panel_node);
+		of_node_put(panel_node);
+		if (IS_ERR(fsl_dev->connector.panel))
+			return PTR_ERR(fsl_dev->connector.panel);
+
+		return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
+	}
+
+	ret = drm_of_find_panel_or_bridge(fsl_dev->np, 0, 0, &panel, &bridge);
+	if (ret)
+		return ret;
+
+	if (panel) {
+		fsl_dev->connector.panel = panel;
+		return fsl_dcu_attach_panel(fsl_dev, panel);
+	}
+
+	return drm_bridge_attach(&fsl_dev->encoder, bridge, NULL);
+}