Commit a189d28e authored by Ruud Derwig's avatar Ruud Derwig Committed by Alexey Brodkin

drm/arcpgu: Make ARC PGU usable on simulation platforms

In case of simulation there's no real encoder/transmitter device
because in the model's virtual LCD  we're rendering whatever
appears in frame-buffer memory.
Signed-off-by: default avatarRuud Derwig <rderwig@synopsys.com>
Signed-off-by: default avatarAlexey Brodkin <abrodkin@synopsys.com>
Acked-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 3c85f20a
arcpgu-y := arcpgu_crtc.o arcpgu_hdmi.o arcpgu_drv.o
arcpgu-y := arcpgu_crtc.o arcpgu_hdmi.o arcpgu_sim.o arcpgu_drv.o
obj-$(CONFIG_DRM_ARCPGU) += arcpgu.o
......@@ -43,6 +43,7 @@ static inline u32 arc_pgu_read(struct arcpgu_drm_private *arcpgu,
int arc_pgu_setup_crtc(struct drm_device *dev);
int arcpgu_drm_hdmi_init(struct drm_device *drm, struct device_node *np);
int arcpgu_drm_sim_init(struct drm_device *drm, struct device_node *np);
struct drm_fbdev_cma *arcpgu_fbdev_cma_init(struct drm_device *dev,
unsigned int preferred_bpp, unsigned int num_crtc,
unsigned int max_conn_count);
......
......@@ -149,14 +149,15 @@ static int arcpgu_load(struct drm_device *drm)
/* find the encoder node and initialize it */
encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0);
if (!encoder_node) {
dev_err(drm->dev, "failed to get an encoder slave node\n");
return -ENODEV;
}
if (encoder_node) {
ret = arcpgu_drm_hdmi_init(drm, encoder_node);
if (ret < 0)
return ret;
} else {
ret = arcpgu_drm_sim_init(drm, 0);
if (ret < 0)
return ret;
}
drm_mode_config_reset(drm);
drm_kms_helper_poll_init(drm);
......
/*
* ARC PGU DRM driver.
*
* Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <drm/drm_crtc_helper.h>
#include <drm/drm_encoder_slave.h>
#include <drm/drm_atomic_helper.h>
#include "arcpgu.h"
#define XRES_DEF 640
#define YRES_DEF 480
#define XRES_MAX 8192
#define YRES_MAX 8192
struct arcpgu_drm_connector {
struct drm_connector connector;
struct drm_encoder_slave *encoder_slave;
};
static int arcpgu_drm_connector_get_modes(struct drm_connector *connector)
{
int count;
count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
return count;
}
static enum drm_connector_status
arcpgu_drm_connector_detect(struct drm_connector *connector, bool force)
{
return connector_status_connected;
}
static void arcpgu_drm_connector_destroy(struct drm_connector *connector)
{
drm_connector_unregister(connector);
drm_connector_cleanup(connector);
}
static const struct drm_connector_helper_funcs
arcpgu_drm_connector_helper_funcs = {
.get_modes = arcpgu_drm_connector_get_modes,
};
static const struct drm_connector_funcs arcpgu_drm_connector_funcs = {
.dpms = drm_helper_connector_dpms,
.reset = drm_atomic_helper_connector_reset,
.detect = arcpgu_drm_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = arcpgu_drm_connector_destroy,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static struct drm_encoder_funcs arcpgu_drm_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
int arcpgu_drm_sim_init(struct drm_device *drm, struct device_node *np)
{
struct arcpgu_drm_connector *arcpgu_connector;
struct drm_encoder_slave *encoder;
struct drm_connector *connector;
int ret;
encoder = devm_kzalloc(drm->dev, sizeof(*encoder), GFP_KERNEL);
if (encoder == NULL)
return -ENOMEM;
encoder->base.possible_crtcs = 1;
encoder->base.possible_clones = 0;
ret = drm_encoder_init(drm, &encoder->base, &arcpgu_drm_encoder_funcs,
DRM_MODE_ENCODER_VIRTUAL, NULL);
if (ret)
return ret;
arcpgu_connector = devm_kzalloc(drm->dev, sizeof(*arcpgu_connector),
GFP_KERNEL);
if (!arcpgu_connector) {
ret = -ENOMEM;
goto error_encoder_cleanup;
}
connector = &arcpgu_connector->connector;
drm_connector_helper_add(connector, &arcpgu_drm_connector_helper_funcs);
ret = drm_connector_init(drm, connector, &arcpgu_drm_connector_funcs,
DRM_MODE_CONNECTOR_VIRTUAL);
if (ret < 0) {
dev_err(drm->dev, "failed to initialize drm connector\n");
goto error_encoder_cleanup;
}
ret = drm_mode_connector_attach_encoder(connector, &encoder->base);
if (ret < 0) {
dev_err(drm->dev, "could not attach connector to encoder\n");
drm_connector_unregister(connector);
goto error_connector_cleanup;
}
arcpgu_connector->encoder_slave = encoder;
return 0;
error_connector_cleanup:
drm_connector_cleanup(connector);
error_encoder_cleanup:
drm_encoder_cleanup(&encoder->base);
return ret;
}
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