Adding upstream version 4.19.249.upstream/4.19.249upstream

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

1 files changed, 244 insertions, 0 deletions

diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c
new file mode 100644
index 000000000..c662efc7e
--- /dev/null
+++ b/drivers/gpu/drm/tegra/output.c
@@ -0,0 +1,244 @@
+/*
+ * Copyright (C) 2012 Avionic Design GmbH
+ * Copyright (C) 2012 NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_panel.h>
+
+#include "drm.h"
+#include "dc.h"
+
+#include <media/cec-notifier.h>
+
+int tegra_output_connector_get_modes(struct drm_connector *connector)
+{
+	struct tegra_output *output = connector_to_output(connector);
+	struct edid *edid = NULL;
+	int err = 0;
+
+	/*
+	 * If the panel provides one or more modes, use them exclusively and
+	 * ignore any other means of obtaining a mode.
+	 */
+	if (output->panel) {
+		err = output->panel->funcs->get_modes(output->panel);
+		if (err > 0)
+			return err;
+	}
+
+	if (output->edid)
+		edid = kmemdup(output->edid, sizeof(*edid), GFP_KERNEL);
+	else if (output->ddc)
+		edid = drm_get_edid(connector, output->ddc);
+
+	cec_notifier_set_phys_addr_from_edid(output->notifier, edid);
+	drm_connector_update_edid_property(connector, edid);
+
+	if (edid) {
+		err = drm_add_edid_modes(connector, edid);
+		kfree(edid);
+	}
+
+	return err;
+}
+
+enum drm_connector_status
+tegra_output_connector_detect(struct drm_connector *connector, bool force)
+{
+	struct tegra_output *output = connector_to_output(connector);
+	enum drm_connector_status status = connector_status_unknown;
+
+	if (gpio_is_valid(output->hpd_gpio)) {
+		if (output->hpd_gpio_flags & OF_GPIO_ACTIVE_LOW) {
+			if (gpio_get_value(output->hpd_gpio) != 0)
+				status = connector_status_disconnected;
+			else
+				status = connector_status_connected;
+		} else {
+			if (gpio_get_value(output->hpd_gpio) == 0)
+				status = connector_status_disconnected;
+			else
+				status = connector_status_connected;
+		}
+	} else {
+		if (!output->panel)
+			status = connector_status_disconnected;
+		else
+			status = connector_status_connected;
+	}
+
+	if (status != connector_status_connected)
+		cec_notifier_phys_addr_invalidate(output->notifier);
+
+	return status;
+}
+
+void tegra_output_connector_destroy(struct drm_connector *connector)
+{
+	drm_connector_unregister(connector);
+	drm_connector_cleanup(connector);
+}
+
+void tegra_output_encoder_destroy(struct drm_encoder *encoder)
+{
+	drm_encoder_cleanup(encoder);
+}
+
+static irqreturn_t hpd_irq(int irq, void *data)
+{
+	struct tegra_output *output = data;
+
+	if (output->connector.dev)
+		drm_helper_hpd_irq_event(output->connector.dev);
+
+	return IRQ_HANDLED;
+}
+
+int tegra_output_probe(struct tegra_output *output)
+{
+	struct device_node *ddc, *panel;
+	int err, size;
+
+	if (!output->of_node)
+		output->of_node = output->dev->of_node;
+
+	panel = of_parse_phandle(output->of_node, "nvidia,panel", 0);
+	if (panel) {
+		output->panel = of_drm_find_panel(panel);
+		if (IS_ERR(output->panel))
+			return PTR_ERR(output->panel);
+
+		of_node_put(panel);
+	}
+
+	output->edid = of_get_property(output->of_node, "nvidia,edid", &size);
+
+	ddc = of_parse_phandle(output->of_node, "nvidia,ddc-i2c-bus", 0);
+	if (ddc) {
+		output->ddc = of_find_i2c_adapter_by_node(ddc);
+		if (!output->ddc) {
+			err = -EPROBE_DEFER;
+			of_node_put(ddc);
+			return err;
+		}
+
+		of_node_put(ddc);
+	}
+
+	output->hpd_gpio = of_get_named_gpio_flags(output->of_node,
+						   "nvidia,hpd-gpio", 0,
+						   &output->hpd_gpio_flags);
+	if (gpio_is_valid(output->hpd_gpio)) {
+		unsigned long flags;
+
+		err = gpio_request_one(output->hpd_gpio, GPIOF_DIR_IN,
+				       "HDMI hotplug detect");
+		if (err < 0) {
+			dev_err(output->dev, "gpio_request_one(): %d\n", err);
+			return err;
+		}
+
+		err = gpio_to_irq(output->hpd_gpio);
+		if (err < 0) {
+			dev_err(output->dev, "gpio_to_irq(): %d\n", err);
+			gpio_free(output->hpd_gpio);
+			return err;
+		}
+
+		output->hpd_irq = err;
+
+		flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
+			IRQF_ONESHOT;
+
+		err = request_threaded_irq(output->hpd_irq, NULL, hpd_irq,
+					   flags, "hpd", output);
+		if (err < 0) {
+			dev_err(output->dev, "failed to request IRQ#%u: %d\n",
+				output->hpd_irq, err);
+			gpio_free(output->hpd_gpio);
+			return err;
+		}
+
+		output->connector.polled = DRM_CONNECTOR_POLL_HPD;
+
+		/*
+		 * Disable the interrupt until the connector has been
+		 * initialized to avoid a race in the hotplug interrupt
+		 * handler.
+		 */
+		disable_irq(output->hpd_irq);
+	}
+
+	return 0;
+}
+
+void tegra_output_remove(struct tegra_output *output)
+{
+	if (gpio_is_valid(output->hpd_gpio)) {
+		free_irq(output->hpd_irq, output);
+		gpio_free(output->hpd_gpio);
+	}
+
+	if (output->ddc)
+		put_device(&output->ddc->dev);
+}
+
+int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
+{
+	int err;
+
+	if (output->panel) {
+		err = drm_panel_attach(output->panel, &output->connector);
+		if (err < 0)
+			return err;
+	}
+
+	/*
+	 * The connector is now registered and ready to receive hotplug events
+	 * so the hotplug interrupt can be enabled.
+	 */
+	if (gpio_is_valid(output->hpd_gpio))
+		enable_irq(output->hpd_irq);
+
+	return 0;
+}
+
+void tegra_output_exit(struct tegra_output *output)
+{
+	/*
+	 * The connector is going away, so the interrupt must be disabled to
+	 * prevent the hotplug interrupt handler from potentially crashing.
+	 */
+	if (gpio_is_valid(output->hpd_gpio))
+		disable_irq(output->hpd_irq);
+
+	if (output->panel)
+		drm_panel_detach(output->panel);
+}
+
+void tegra_output_find_possible_crtcs(struct tegra_output *output,
+				      struct drm_device *drm)
+{
+	struct device *dev = output->dev;
+	struct drm_crtc *crtc;
+	unsigned int mask = 0;
+
+	drm_for_each_crtc(crtc, drm) {
+		struct tegra_dc *dc = to_tegra_dc(crtc);
+
+		if (tegra_dc_has_output(dc, dev))
+			mask |= drm_crtc_mask(crtc);
+	}
+
+	if (mask == 0) {
+		dev_warn(dev, "missing output definition for heads in DT\n");
+		mask = 0x3;
+	}
+
+	output->encoder.possible_crtcs = mask;
+}