313 lines
8.3 KiB
C
313 lines
8.3 KiB
C
/*
|
|
* Copyright (C) 2014 Traphandler
|
|
* Copyright (C) 2014 Free Electrons
|
|
* Copyright (C) 2014 Atmel
|
|
*
|
|
* Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
|
|
* Author: Boris BREZILLON <boris.brezillon@free-electrons.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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/of_graph.h>
|
|
|
|
#include <drm/drmP.h>
|
|
#include <drm/drm_panel.h>
|
|
|
|
#include "atmel_hlcdc_dc.h"
|
|
|
|
/**
|
|
* Atmel HLCDC RGB output mode
|
|
*/
|
|
enum atmel_hlcdc_connector_rgb_mode {
|
|
ATMEL_HLCDC_CONNECTOR_RGB444,
|
|
ATMEL_HLCDC_CONNECTOR_RGB565,
|
|
ATMEL_HLCDC_CONNECTOR_RGB666,
|
|
ATMEL_HLCDC_CONNECTOR_RGB888,
|
|
};
|
|
|
|
/**
|
|
* Atmel HLCDC RGB connector structure
|
|
*
|
|
* This structure stores RGB slave device information.
|
|
*
|
|
* @connector: DRM connector
|
|
* @encoder: DRM encoder
|
|
* @dc: pointer to the atmel_hlcdc_dc structure
|
|
* @dpms: current DPMS mode
|
|
*/
|
|
struct atmel_hlcdc_rgb_output {
|
|
struct drm_connector connector;
|
|
struct drm_encoder encoder;
|
|
struct atmel_hlcdc_dc *dc;
|
|
int dpms;
|
|
};
|
|
|
|
static inline struct atmel_hlcdc_rgb_output *
|
|
drm_connector_to_atmel_hlcdc_rgb_output(struct drm_connector *connector)
|
|
{
|
|
return container_of(connector, struct atmel_hlcdc_rgb_output,
|
|
connector);
|
|
}
|
|
|
|
static inline struct atmel_hlcdc_rgb_output *
|
|
drm_encoder_to_atmel_hlcdc_rgb_output(struct drm_encoder *encoder)
|
|
{
|
|
return container_of(encoder, struct atmel_hlcdc_rgb_output, encoder);
|
|
}
|
|
|
|
/**
|
|
* Atmel HLCDC Panel device structure
|
|
*
|
|
* This structure is specialization of the slave device structure to
|
|
* interface with drm panels.
|
|
*
|
|
* @base: base slave device fields
|
|
* @panel: drm panel attached to this slave device
|
|
*/
|
|
struct atmel_hlcdc_panel {
|
|
struct atmel_hlcdc_rgb_output base;
|
|
struct drm_panel *panel;
|
|
};
|
|
|
|
static inline struct atmel_hlcdc_panel *
|
|
atmel_hlcdc_rgb_output_to_panel(struct atmel_hlcdc_rgb_output *output)
|
|
{
|
|
return container_of(output, struct atmel_hlcdc_panel, base);
|
|
}
|
|
|
|
static void atmel_hlcdc_panel_encoder_enable(struct drm_encoder *encoder)
|
|
{
|
|
struct atmel_hlcdc_rgb_output *rgb =
|
|
drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
|
|
struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
|
|
|
|
drm_panel_enable(panel->panel);
|
|
}
|
|
|
|
static void atmel_hlcdc_panel_encoder_disable(struct drm_encoder *encoder)
|
|
{
|
|
struct atmel_hlcdc_rgb_output *rgb =
|
|
drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
|
|
struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
|
|
|
|
drm_panel_disable(panel->panel);
|
|
}
|
|
|
|
static bool
|
|
atmel_hlcdc_panel_encoder_mode_fixup(struct drm_encoder *encoder,
|
|
const struct drm_display_mode *mode,
|
|
struct drm_display_mode *adjusted)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
atmel_hlcdc_rgb_encoder_mode_set(struct drm_encoder *encoder,
|
|
struct drm_display_mode *mode,
|
|
struct drm_display_mode *adjusted)
|
|
{
|
|
struct atmel_hlcdc_rgb_output *rgb =
|
|
drm_encoder_to_atmel_hlcdc_rgb_output(encoder);
|
|
struct drm_display_info *info = &rgb->connector.display_info;
|
|
unsigned int cfg;
|
|
|
|
cfg = 0;
|
|
|
|
if (info->num_bus_formats) {
|
|
switch (info->bus_formats[0]) {
|
|
case MEDIA_BUS_FMT_RGB565_1X16:
|
|
cfg |= ATMEL_HLCDC_CONNECTOR_RGB565 << 8;
|
|
break;
|
|
case MEDIA_BUS_FMT_RGB666_1X18:
|
|
cfg |= ATMEL_HLCDC_CONNECTOR_RGB666 << 8;
|
|
break;
|
|
case MEDIA_BUS_FMT_RGB888_1X24:
|
|
cfg |= ATMEL_HLCDC_CONNECTOR_RGB888 << 8;
|
|
break;
|
|
case MEDIA_BUS_FMT_RGB444_1X12:
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
regmap_update_bits(rgb->dc->hlcdc->regmap, ATMEL_HLCDC_CFG(5),
|
|
ATMEL_HLCDC_MODE_MASK,
|
|
cfg);
|
|
}
|
|
|
|
static struct drm_encoder_helper_funcs atmel_hlcdc_panel_encoder_helper_funcs = {
|
|
.mode_fixup = atmel_hlcdc_panel_encoder_mode_fixup,
|
|
.mode_set = atmel_hlcdc_rgb_encoder_mode_set,
|
|
.disable = atmel_hlcdc_panel_encoder_disable,
|
|
.enable = atmel_hlcdc_panel_encoder_enable,
|
|
};
|
|
|
|
static void atmel_hlcdc_rgb_encoder_destroy(struct drm_encoder *encoder)
|
|
{
|
|
drm_encoder_cleanup(encoder);
|
|
memset(encoder, 0, sizeof(*encoder));
|
|
}
|
|
|
|
static const struct drm_encoder_funcs atmel_hlcdc_panel_encoder_funcs = {
|
|
.destroy = atmel_hlcdc_rgb_encoder_destroy,
|
|
};
|
|
|
|
static int atmel_hlcdc_panel_get_modes(struct drm_connector *connector)
|
|
{
|
|
struct atmel_hlcdc_rgb_output *rgb =
|
|
drm_connector_to_atmel_hlcdc_rgb_output(connector);
|
|
struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
|
|
|
|
return panel->panel->funcs->get_modes(panel->panel);
|
|
}
|
|
|
|
static int atmel_hlcdc_rgb_mode_valid(struct drm_connector *connector,
|
|
struct drm_display_mode *mode)
|
|
{
|
|
struct atmel_hlcdc_rgb_output *rgb =
|
|
drm_connector_to_atmel_hlcdc_rgb_output(connector);
|
|
|
|
return atmel_hlcdc_dc_mode_valid(rgb->dc, mode);
|
|
}
|
|
|
|
|
|
|
|
static struct drm_encoder *
|
|
atmel_hlcdc_rgb_best_encoder(struct drm_connector *connector)
|
|
{
|
|
struct atmel_hlcdc_rgb_output *rgb =
|
|
drm_connector_to_atmel_hlcdc_rgb_output(connector);
|
|
|
|
return &rgb->encoder;
|
|
}
|
|
|
|
static struct drm_connector_helper_funcs atmel_hlcdc_panel_connector_helper_funcs = {
|
|
.get_modes = atmel_hlcdc_panel_get_modes,
|
|
.mode_valid = atmel_hlcdc_rgb_mode_valid,
|
|
.best_encoder = atmel_hlcdc_rgb_best_encoder,
|
|
};
|
|
|
|
static enum drm_connector_status
|
|
atmel_hlcdc_panel_connector_detect(struct drm_connector *connector, bool force)
|
|
{
|
|
return connector_status_connected;
|
|
}
|
|
|
|
static void
|
|
atmel_hlcdc_panel_connector_destroy(struct drm_connector *connector)
|
|
{
|
|
struct atmel_hlcdc_rgb_output *rgb =
|
|
drm_connector_to_atmel_hlcdc_rgb_output(connector);
|
|
struct atmel_hlcdc_panel *panel = atmel_hlcdc_rgb_output_to_panel(rgb);
|
|
|
|
drm_panel_detach(panel->panel);
|
|
drm_connector_cleanup(connector);
|
|
}
|
|
|
|
static const struct drm_connector_funcs atmel_hlcdc_panel_connector_funcs = {
|
|
.dpms = drm_atomic_helper_connector_dpms,
|
|
.detect = atmel_hlcdc_panel_connector_detect,
|
|
.fill_modes = drm_helper_probe_single_connector_modes,
|
|
.destroy = atmel_hlcdc_panel_connector_destroy,
|
|
.reset = drm_atomic_helper_connector_reset,
|
|
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
|
|
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
|
|
};
|
|
|
|
static int atmel_hlcdc_create_panel_output(struct drm_device *dev,
|
|
struct of_endpoint *ep)
|
|
{
|
|
struct atmel_hlcdc_dc *dc = dev->dev_private;
|
|
struct device_node *np;
|
|
struct drm_panel *p = NULL;
|
|
struct atmel_hlcdc_panel *panel;
|
|
int ret;
|
|
|
|
np = of_graph_get_remote_port_parent(ep->local_node);
|
|
if (!np)
|
|
return -EINVAL;
|
|
|
|
p = of_drm_find_panel(np);
|
|
of_node_put(np);
|
|
|
|
if (!p)
|
|
return -EPROBE_DEFER;
|
|
|
|
panel = devm_kzalloc(dev->dev, sizeof(*panel), GFP_KERNEL);
|
|
if (!panel)
|
|
return -EINVAL;
|
|
|
|
panel->base.dpms = DRM_MODE_DPMS_OFF;
|
|
|
|
panel->base.dc = dc;
|
|
|
|
drm_encoder_helper_add(&panel->base.encoder,
|
|
&atmel_hlcdc_panel_encoder_helper_funcs);
|
|
ret = drm_encoder_init(dev, &panel->base.encoder,
|
|
&atmel_hlcdc_panel_encoder_funcs,
|
|
DRM_MODE_ENCODER_LVDS);
|
|
if (ret)
|
|
return ret;
|
|
|
|
panel->base.connector.dpms = DRM_MODE_DPMS_OFF;
|
|
panel->base.connector.polled = DRM_CONNECTOR_POLL_CONNECT;
|
|
drm_connector_helper_add(&panel->base.connector,
|
|
&atmel_hlcdc_panel_connector_helper_funcs);
|
|
ret = drm_connector_init(dev, &panel->base.connector,
|
|
&atmel_hlcdc_panel_connector_funcs,
|
|
DRM_MODE_CONNECTOR_LVDS);
|
|
if (ret)
|
|
goto err_encoder_cleanup;
|
|
|
|
drm_mode_connector_attach_encoder(&panel->base.connector,
|
|
&panel->base.encoder);
|
|
panel->base.encoder.possible_crtcs = 0x1;
|
|
|
|
drm_panel_attach(p, &panel->base.connector);
|
|
panel->panel = p;
|
|
|
|
return 0;
|
|
|
|
err_encoder_cleanup:
|
|
drm_encoder_cleanup(&panel->base.encoder);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int atmel_hlcdc_create_outputs(struct drm_device *dev)
|
|
{
|
|
struct device_node *port_np, *np;
|
|
struct of_endpoint ep;
|
|
int ret;
|
|
|
|
port_np = of_get_child_by_name(dev->dev->of_node, "port");
|
|
if (!port_np)
|
|
return -EINVAL;
|
|
|
|
np = of_get_child_by_name(port_np, "endpoint");
|
|
of_node_put(port_np);
|
|
|
|
if (!np)
|
|
return -EINVAL;
|
|
|
|
ret = of_graph_parse_endpoint(np, &ep);
|
|
of_node_put(port_np);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* We currently only support panel output */
|
|
return atmel_hlcdc_create_panel_output(dev, &ep);
|
|
}
|