mirror of
git://nv-tegra.nvidia.com/linux-nv-oot.git
synced 2025-12-23 01:31:30 +03:00
drm/tegra: Add upstream tegra-drm driver
Add the upstream tegra-drm driver with the 'Host1x/Tegra UAPI' series [0] applied. This driver will be built as an external module for testing and development with upstream Linux kernels. The following modifications have been made to the series posted upstream 1. Update the Makefile to always build the driver as a module 2. Always enable the tegra_drm_ioctl_xxx in the tegra_drm_ioctls and remove the dependency on CONFIG_DRM_TEGRA_STAGING. 3. Rename the include/uapi/drm/tegra_drm.h to include/uapi/drm/tegra_drm_next.h to avoid conflicts with upstream headers when building as an external module. 5. Rename the module that is built to be tegra-drm-next.ko instead of tegra-drm.ko to avoid any depmod conflicts with the upstream driver. [0] https://patchwork.ozlabs.org/project/linux-tegra/list/?series=215770 Bug 3156385 Change-Id: I19206f989325c9c6ff3c2b9301d964140d52234f Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2435802 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit
This commit is contained in:
Jon Hunter
committed by
Laxman Dewangan
Laxman Dewangan
parent
46b9df5186
commit
b8c2d943ed
264
drivers/gpu/drm/tegra/output.c
Normal file
264
drivers/gpu/drm/tegra/output.c
Normal file
@@ -0,0 +1,264 @@
|
||||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* Copyright (C) 2012 Avionic Design GmbH
|
||||
* Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
|
||||
*/
|
||||
|
||||
#include <drm/drm_atomic_helper.h>
|
||||
#include <drm/drm_panel.h>
|
||||
#include <drm/drm_simple_kms_helper.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 = drm_panel_get_modes(output->panel, connector);
|
||||
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->cec, 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 (output->hpd_gpio) {
|
||||
if (gpiod_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->cec);
|
||||
|
||||
return status;
|
||||
}
|
||||
|
||||
void tegra_output_connector_destroy(struct drm_connector *connector)
|
||||
{
|
||||
struct tegra_output *output = connector_to_output(connector);
|
||||
|
||||
if (output->cec)
|
||||
cec_notifier_conn_unregister(output->cec);
|
||||
|
||||
drm_connector_unregister(connector);
|
||||
drm_connector_cleanup(connector);
|
||||
}
|
||||
|
||||
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;
|
||||
unsigned long flags;
|
||||
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 = devm_gpiod_get_from_of_node(output->dev,
|
||||
output->of_node,
|
||||
"nvidia,hpd-gpio", 0,
|
||||
GPIOD_IN,
|
||||
"HDMI hotplug detect");
|
||||
if (IS_ERR(output->hpd_gpio)) {
|
||||
if (PTR_ERR(output->hpd_gpio) != -ENOENT)
|
||||
return PTR_ERR(output->hpd_gpio);
|
||||
|
||||
output->hpd_gpio = NULL;
|
||||
}
|
||||
|
||||
if (output->hpd_gpio) {
|
||||
err = gpiod_to_irq(output->hpd_gpio);
|
||||
if (err < 0) {
|
||||
dev_err(output->dev, "gpiod_to_irq(): %d\n", err);
|
||||
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);
|
||||
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 (output->hpd_gpio)
|
||||
free_irq(output->hpd_irq, output);
|
||||
|
||||
if (output->ddc)
|
||||
put_device(&output->ddc->dev);
|
||||
}
|
||||
|
||||
int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
|
||||
{
|
||||
int connector_type;
|
||||
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 (output->hpd_gpio)
|
||||
enable_irq(output->hpd_irq);
|
||||
|
||||
connector_type = output->connector.connector_type;
|
||||
/*
|
||||
* Create a CEC notifier for HDMI connector.
|
||||
*/
|
||||
if (connector_type == DRM_MODE_CONNECTOR_HDMIA ||
|
||||
connector_type == DRM_MODE_CONNECTOR_HDMIB) {
|
||||
struct cec_connector_info conn_info;
|
||||
|
||||
cec_fill_conn_info_from_drm(&conn_info, &output->connector);
|
||||
output->cec = cec_notifier_conn_register(output->dev, NULL,
|
||||
&conn_info);
|
||||
if (!output->cec)
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
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 (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;
|
||||
}
|
||||
|
||||
int tegra_output_suspend(struct tegra_output *output)
|
||||
{
|
||||
if (output->hpd_irq)
|
||||
disable_irq(output->hpd_irq);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int tegra_output_resume(struct tegra_output *output)
|
||||
{
|
||||
if (output->hpd_irq)
|
||||
enable_irq(output->hpd_irq);
|
||||
|
||||
return 0;
|
||||
}
|
||||
Reference in New Issue
Block a user