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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2019-2022 Bootlin
* Author: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
*/
#include <linux/types.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_connector.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_encoder.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_modeset_helper_vtables.h>
#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include "logicvc_crtc.h"
#include "logicvc_drm.h"
#include "logicvc_interface.h"
#include "logicvc_regs.h"
#define logicvc_interface_from_drm_encoder(c) \
container_of(c, struct logicvc_interface, drm_encoder)
#define logicvc_interface_from_drm_connector(c) \
container_of(c, struct logicvc_interface, drm_connector)
static void logicvc_encoder_enable(struct drm_encoder *drm_encoder)
{
struct logicvc_drm *logicvc = logicvc_drm(drm_encoder->dev);
struct logicvc_interface *interface =
logicvc_interface_from_drm_encoder(drm_encoder);
regmap_update_bits(logicvc->regmap, LOGICVC_POWER_CTRL_REG,
LOGICVC_POWER_CTRL_VIDEO_ENABLE,
LOGICVC_POWER_CTRL_VIDEO_ENABLE);
if (interface->drm_panel) {
drm_panel_prepare(interface->drm_panel);
drm_panel_enable(interface->drm_panel);
}
}
static void logicvc_encoder_disable(struct drm_encoder *drm_encoder)
{
struct logicvc_interface *interface =
logicvc_interface_from_drm_encoder(drm_encoder);
if (interface->drm_panel) {
drm_panel_disable(interface->drm_panel);
drm_panel_unprepare(interface->drm_panel);
}
}
static const struct drm_encoder_helper_funcs logicvc_encoder_helper_funcs = {
.enable = logicvc_encoder_enable,
.disable = logicvc_encoder_disable,
};
static const struct drm_encoder_funcs logicvc_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
static int logicvc_connector_get_modes(struct drm_connector *drm_connector)
{
struct logicvc_interface *interface =
logicvc_interface_from_drm_connector(drm_connector);
if (interface->drm_panel)
return drm_panel_get_modes(interface->drm_panel, drm_connector);
WARN_ONCE(1, "Retrieving modes from a native connector is not implemented.");
return 0;
}
static const struct drm_connector_helper_funcs logicvc_connector_helper_funcs = {
.get_modes = logicvc_connector_get_modes,
};
static const struct drm_connector_funcs logicvc_connector_funcs = {
.reset = drm_atomic_helper_connector_reset,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = drm_connector_cleanup,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static int logicvc_interface_encoder_type(struct logicvc_drm *logicvc)
{
switch (logicvc->config.display_interface) {
case LOGICVC_DISPLAY_INTERFACE_LVDS_4BITS:
case LOGICVC_DISPLAY_INTERFACE_LVDS_4BITS_CAMERA:
case LOGICVC_DISPLAY_INTERFACE_LVDS_3BITS:
return DRM_MODE_ENCODER_LVDS;
case LOGICVC_DISPLAY_INTERFACE_DVI:
return DRM_MODE_ENCODER_TMDS;
case LOGICVC_DISPLAY_INTERFACE_RGB:
return DRM_MODE_ENCODER_DPI;
default:
return DRM_MODE_ENCODER_NONE;
}
}
static int logicvc_interface_connector_type(struct logicvc_drm *logicvc)
{
switch (logicvc->config.display_interface) {
case LOGICVC_DISPLAY_INTERFACE_LVDS_4BITS:
case LOGICVC_DISPLAY_INTERFACE_LVDS_4BITS_CAMERA:
case LOGICVC_DISPLAY_INTERFACE_LVDS_3BITS:
return DRM_MODE_CONNECTOR_LVDS;
case LOGICVC_DISPLAY_INTERFACE_DVI:
return DRM_MODE_CONNECTOR_DVID;
case LOGICVC_DISPLAY_INTERFACE_RGB:
return DRM_MODE_CONNECTOR_DPI;
default:
return DRM_MODE_CONNECTOR_Unknown;
}
}
static bool logicvc_interface_native_connector(struct logicvc_drm *logicvc)
{
switch (logicvc->config.display_interface) {
case LOGICVC_DISPLAY_INTERFACE_DVI:
return true;
default:
return false;
}
}
void logicvc_interface_attach_crtc(struct logicvc_drm *logicvc)
{
uint32_t possible_crtcs = drm_crtc_mask(&logicvc->crtc->drm_crtc);
logicvc->interface->drm_encoder.possible_crtcs = possible_crtcs;
}
int logicvc_interface_init(struct logicvc_drm *logicvc)
{
struct logicvc_interface *interface;
struct drm_device *drm_dev = &logicvc->drm_dev;
struct device *dev = drm_dev->dev;
struct device_node *of_node = dev->of_node;
int encoder_type = logicvc_interface_encoder_type(logicvc);
int connector_type = logicvc_interface_connector_type(logicvc);
bool native_connector = logicvc_interface_native_connector(logicvc);
int ret;
interface = devm_kzalloc(dev, sizeof(*interface), GFP_KERNEL);
if (!interface) {
ret = -ENOMEM;
goto error_early;
}
ret = drm_of_find_panel_or_bridge(of_node, 0, 0, &interface->drm_panel,
&interface->drm_bridge);
if (ret == -EPROBE_DEFER)
goto error_early;
ret = drm_encoder_init(drm_dev, &interface->drm_encoder,
&logicvc_encoder_funcs, encoder_type, NULL);
if (ret) {
drm_err(drm_dev, "Failed to initialize encoder\n");
goto error_early;
}
drm_encoder_helper_add(&interface->drm_encoder,
&logicvc_encoder_helper_funcs);
if (native_connector || interface->drm_panel) {
ret = drm_connector_init(drm_dev, &interface->drm_connector,
&logicvc_connector_funcs,
connector_type);
if (ret) {
drm_err(drm_dev, "Failed to initialize connector\n");
goto error_encoder;
}
drm_connector_helper_add(&interface->drm_connector,
&logicvc_connector_helper_funcs);
ret = drm_connector_attach_encoder(&interface->drm_connector,
&interface->drm_encoder);
if (ret) {
drm_err(drm_dev,
"Failed to attach connector to encoder\n");
goto error_encoder;
}
}
if (interface->drm_bridge) {
ret = drm_bridge_attach(&interface->drm_encoder,
interface->drm_bridge, NULL, 0);
if (ret) {
drm_err(drm_dev,
"Failed to attach bridge to encoder\n");
goto error_encoder;
}
}
logicvc->interface = interface;
return 0;
error_encoder:
drm_encoder_cleanup(&interface->drm_encoder);
error_early:
return ret;
}
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