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![Thierry Reding](/assets/img/avatar_default.png)
The SOR found on Tegra186 is very similar to the one found on Tegra210 and earlier. However, due to some changes in the display architecture, some programming sequences have changed and some register have moved around. Signed-off-by: Thierry Reding <treding@nvidia.com>
244 lines
5.6 KiB
C
244 lines
5.6 KiB
C
/*
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* Copyright (C) 2012 Avionic Design GmbH
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* Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_panel.h>
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#include "drm.h"
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#include "dc.h"
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#include <media/cec-notifier.h>
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int tegra_output_connector_get_modes(struct drm_connector *connector)
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{
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struct tegra_output *output = connector_to_output(connector);
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struct edid *edid = NULL;
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int err = 0;
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/*
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* If the panel provides one or more modes, use them exclusively and
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* ignore any other means of obtaining a mode.
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*/
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if (output->panel) {
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err = output->panel->funcs->get_modes(output->panel);
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if (err > 0)
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return err;
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}
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if (output->edid)
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edid = kmemdup(output->edid, sizeof(*edid), GFP_KERNEL);
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else if (output->ddc)
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edid = drm_get_edid(connector, output->ddc);
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cec_notifier_set_phys_addr_from_edid(output->notifier, edid);
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drm_mode_connector_update_edid_property(connector, edid);
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if (edid) {
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err = drm_add_edid_modes(connector, edid);
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kfree(edid);
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}
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return err;
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}
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enum drm_connector_status
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tegra_output_connector_detect(struct drm_connector *connector, bool force)
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{
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struct tegra_output *output = connector_to_output(connector);
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enum drm_connector_status status = connector_status_unknown;
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if (gpio_is_valid(output->hpd_gpio)) {
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if (output->hpd_gpio_flags & OF_GPIO_ACTIVE_LOW) {
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if (gpio_get_value(output->hpd_gpio) != 0)
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status = connector_status_disconnected;
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else
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status = connector_status_connected;
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} else {
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if (gpio_get_value(output->hpd_gpio) == 0)
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status = connector_status_disconnected;
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else
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status = connector_status_connected;
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}
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} else {
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if (!output->panel)
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status = connector_status_disconnected;
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else
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status = connector_status_connected;
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}
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if (status != connector_status_connected)
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cec_notifier_phys_addr_invalidate(output->notifier);
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return status;
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}
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void tegra_output_connector_destroy(struct drm_connector *connector)
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{
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drm_connector_unregister(connector);
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drm_connector_cleanup(connector);
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}
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void tegra_output_encoder_destroy(struct drm_encoder *encoder)
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{
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drm_encoder_cleanup(encoder);
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}
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static irqreturn_t hpd_irq(int irq, void *data)
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{
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struct tegra_output *output = data;
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if (output->connector.dev)
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drm_helper_hpd_irq_event(output->connector.dev);
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return IRQ_HANDLED;
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}
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int tegra_output_probe(struct tegra_output *output)
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{
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struct device_node *ddc, *panel;
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int err, size;
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if (!output->of_node)
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output->of_node = output->dev->of_node;
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panel = of_parse_phandle(output->of_node, "nvidia,panel", 0);
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if (panel) {
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output->panel = of_drm_find_panel(panel);
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if (!output->panel)
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return -EPROBE_DEFER;
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of_node_put(panel);
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}
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output->edid = of_get_property(output->of_node, "nvidia,edid", &size);
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ddc = of_parse_phandle(output->of_node, "nvidia,ddc-i2c-bus", 0);
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if (ddc) {
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output->ddc = of_find_i2c_adapter_by_node(ddc);
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if (!output->ddc) {
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err = -EPROBE_DEFER;
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of_node_put(ddc);
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return err;
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}
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of_node_put(ddc);
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}
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output->hpd_gpio = of_get_named_gpio_flags(output->of_node,
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"nvidia,hpd-gpio", 0,
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&output->hpd_gpio_flags);
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if (gpio_is_valid(output->hpd_gpio)) {
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unsigned long flags;
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err = gpio_request_one(output->hpd_gpio, GPIOF_DIR_IN,
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"HDMI hotplug detect");
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if (err < 0) {
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dev_err(output->dev, "gpio_request_one(): %d\n", err);
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return err;
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}
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err = gpio_to_irq(output->hpd_gpio);
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if (err < 0) {
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dev_err(output->dev, "gpio_to_irq(): %d\n", err);
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gpio_free(output->hpd_gpio);
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return err;
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}
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output->hpd_irq = err;
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flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
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IRQF_ONESHOT;
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err = request_threaded_irq(output->hpd_irq, NULL, hpd_irq,
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flags, "hpd", output);
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if (err < 0) {
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dev_err(output->dev, "failed to request IRQ#%u: %d\n",
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output->hpd_irq, err);
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gpio_free(output->hpd_gpio);
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return err;
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}
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output->connector.polled = DRM_CONNECTOR_POLL_HPD;
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/*
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* Disable the interrupt until the connector has been
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* initialized to avoid a race in the hotplug interrupt
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* handler.
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*/
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disable_irq(output->hpd_irq);
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}
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return 0;
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}
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void tegra_output_remove(struct tegra_output *output)
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{
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if (gpio_is_valid(output->hpd_gpio)) {
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free_irq(output->hpd_irq, output);
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gpio_free(output->hpd_gpio);
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}
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if (output->ddc)
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put_device(&output->ddc->dev);
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}
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int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
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{
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int err;
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if (output->panel) {
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err = drm_panel_attach(output->panel, &output->connector);
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if (err < 0)
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return err;
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}
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/*
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* The connector is now registered and ready to receive hotplug events
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* so the hotplug interrupt can be enabled.
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*/
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if (gpio_is_valid(output->hpd_gpio))
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enable_irq(output->hpd_irq);
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return 0;
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}
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void tegra_output_exit(struct tegra_output *output)
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{
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/*
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* The connector is going away, so the interrupt must be disabled to
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* prevent the hotplug interrupt handler from potentially crashing.
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*/
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if (gpio_is_valid(output->hpd_gpio))
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disable_irq(output->hpd_irq);
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if (output->panel)
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drm_panel_detach(output->panel);
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}
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void tegra_output_find_possible_crtcs(struct tegra_output *output,
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struct drm_device *drm)
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{
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struct device *dev = output->dev;
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struct drm_crtc *crtc;
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unsigned int mask = 0;
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drm_for_each_crtc(crtc, drm) {
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struct tegra_dc *dc = to_tegra_dc(crtc);
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if (tegra_dc_has_output(dc, dev))
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mask |= drm_crtc_mask(crtc);
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}
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if (mask == 0) {
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dev_warn(dev, "missing output definition for heads in DT\n");
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mask = 0x3;
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}
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output->encoder.possible_crtcs = mask;
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}
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