![Lucas Stach](/assets/img/avatar_default.png)
The imx parrallel display exposes a, well, display parallel interface. Use the correct enum, instead of disguising the thing as a VGA connector. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
302 lines
7.9 KiB
C
302 lines
7.9 KiB
C
/*
|
|
* i.MX drm driver - parallel display implementation
|
|
*
|
|
* Copyright (C) 2012 Sascha Hauer, Pengutronix
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
* 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 <linux/component.h>
|
|
#include <linux/module.h>
|
|
#include <drm/drmP.h>
|
|
#include <drm/drm_atomic_helper.h>
|
|
#include <drm/drm_fb_helper.h>
|
|
#include <drm/drm_crtc_helper.h>
|
|
#include <drm/drm_of.h>
|
|
#include <drm/drm_panel.h>
|
|
#include <linux/videodev2.h>
|
|
#include <video/of_display_timing.h>
|
|
|
|
#include "imx-drm.h"
|
|
|
|
struct imx_parallel_display {
|
|
struct drm_connector connector;
|
|
struct drm_encoder encoder;
|
|
struct device *dev;
|
|
void *edid;
|
|
int edid_len;
|
|
u32 bus_format;
|
|
u32 bus_flags;
|
|
struct drm_display_mode mode;
|
|
struct drm_panel *panel;
|
|
struct drm_bridge *bridge;
|
|
};
|
|
|
|
static inline struct imx_parallel_display *con_to_imxpd(struct drm_connector *c)
|
|
{
|
|
return container_of(c, struct imx_parallel_display, connector);
|
|
}
|
|
|
|
static inline struct imx_parallel_display *enc_to_imxpd(struct drm_encoder *e)
|
|
{
|
|
return container_of(e, struct imx_parallel_display, encoder);
|
|
}
|
|
|
|
static int imx_pd_connector_get_modes(struct drm_connector *connector)
|
|
{
|
|
struct imx_parallel_display *imxpd = con_to_imxpd(connector);
|
|
struct device_node *np = imxpd->dev->of_node;
|
|
int num_modes = 0;
|
|
|
|
if (imxpd->panel && imxpd->panel->funcs &&
|
|
imxpd->panel->funcs->get_modes) {
|
|
num_modes = imxpd->panel->funcs->get_modes(imxpd->panel);
|
|
if (num_modes > 0)
|
|
return num_modes;
|
|
}
|
|
|
|
if (imxpd->edid) {
|
|
drm_mode_connector_update_edid_property(connector, imxpd->edid);
|
|
num_modes = drm_add_edid_modes(connector, imxpd->edid);
|
|
}
|
|
|
|
if (np) {
|
|
struct drm_display_mode *mode = drm_mode_create(connector->dev);
|
|
int ret;
|
|
|
|
if (!mode)
|
|
return -EINVAL;
|
|
|
|
ret = of_get_drm_display_mode(np, &imxpd->mode,
|
|
&imxpd->bus_flags,
|
|
OF_USE_NATIVE_MODE);
|
|
if (ret)
|
|
return ret;
|
|
|
|
drm_mode_copy(mode, &imxpd->mode);
|
|
mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
|
|
drm_mode_probed_add(connector, mode);
|
|
num_modes++;
|
|
}
|
|
|
|
return num_modes;
|
|
}
|
|
|
|
static struct drm_encoder *imx_pd_connector_best_encoder(
|
|
struct drm_connector *connector)
|
|
{
|
|
struct imx_parallel_display *imxpd = con_to_imxpd(connector);
|
|
|
|
return &imxpd->encoder;
|
|
}
|
|
|
|
static void imx_pd_encoder_enable(struct drm_encoder *encoder)
|
|
{
|
|
struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
|
|
|
|
drm_panel_prepare(imxpd->panel);
|
|
drm_panel_enable(imxpd->panel);
|
|
}
|
|
|
|
static void imx_pd_encoder_disable(struct drm_encoder *encoder)
|
|
{
|
|
struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
|
|
|
|
drm_panel_disable(imxpd->panel);
|
|
drm_panel_unprepare(imxpd->panel);
|
|
}
|
|
|
|
static int imx_pd_encoder_atomic_check(struct drm_encoder *encoder,
|
|
struct drm_crtc_state *crtc_state,
|
|
struct drm_connector_state *conn_state)
|
|
{
|
|
struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
|
|
struct drm_display_info *di = &conn_state->connector->display_info;
|
|
struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
|
|
|
|
if (!imxpd->bus_format && di->num_bus_formats) {
|
|
imx_crtc_state->bus_flags = di->bus_flags;
|
|
imx_crtc_state->bus_format = di->bus_formats[0];
|
|
} else {
|
|
imx_crtc_state->bus_flags = imxpd->bus_flags;
|
|
imx_crtc_state->bus_format = imxpd->bus_format;
|
|
}
|
|
imx_crtc_state->di_hsync_pin = 2;
|
|
imx_crtc_state->di_vsync_pin = 3;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct drm_connector_funcs imx_pd_connector_funcs = {
|
|
.fill_modes = drm_helper_probe_single_connector_modes,
|
|
.destroy = imx_drm_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 const struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
|
|
.get_modes = imx_pd_connector_get_modes,
|
|
.best_encoder = imx_pd_connector_best_encoder,
|
|
};
|
|
|
|
static const struct drm_encoder_funcs imx_pd_encoder_funcs = {
|
|
.destroy = imx_drm_encoder_destroy,
|
|
};
|
|
|
|
static const struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
|
|
.enable = imx_pd_encoder_enable,
|
|
.disable = imx_pd_encoder_disable,
|
|
.atomic_check = imx_pd_encoder_atomic_check,
|
|
};
|
|
|
|
static int imx_pd_register(struct drm_device *drm,
|
|
struct imx_parallel_display *imxpd)
|
|
{
|
|
struct drm_encoder *encoder = &imxpd->encoder;
|
|
int ret;
|
|
|
|
ret = imx_drm_encoder_parse_of(drm, encoder, imxpd->dev->of_node);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* set the connector's dpms to OFF so that
|
|
* drm_helper_connector_dpms() won't return
|
|
* immediately since the current state is ON
|
|
* at this point.
|
|
*/
|
|
imxpd->connector.dpms = DRM_MODE_DPMS_OFF;
|
|
|
|
drm_encoder_helper_add(encoder, &imx_pd_encoder_helper_funcs);
|
|
drm_encoder_init(drm, encoder, &imx_pd_encoder_funcs,
|
|
DRM_MODE_ENCODER_NONE, NULL);
|
|
|
|
if (!imxpd->bridge) {
|
|
drm_connector_helper_add(&imxpd->connector,
|
|
&imx_pd_connector_helper_funcs);
|
|
drm_connector_init(drm, &imxpd->connector,
|
|
&imx_pd_connector_funcs,
|
|
DRM_MODE_CONNECTOR_DPI);
|
|
}
|
|
|
|
if (imxpd->panel)
|
|
drm_panel_attach(imxpd->panel, &imxpd->connector);
|
|
|
|
if (imxpd->bridge) {
|
|
ret = drm_bridge_attach(encoder, imxpd->bridge, NULL);
|
|
if (ret < 0) {
|
|
dev_err(imxpd->dev, "failed to attach bridge: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
} else {
|
|
drm_mode_connector_attach_encoder(&imxpd->connector, encoder);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int imx_pd_bind(struct device *dev, struct device *master, void *data)
|
|
{
|
|
struct drm_device *drm = data;
|
|
struct device_node *np = dev->of_node;
|
|
const u8 *edidp;
|
|
struct imx_parallel_display *imxpd;
|
|
int ret;
|
|
u32 bus_format = 0;
|
|
const char *fmt;
|
|
|
|
imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL);
|
|
if (!imxpd)
|
|
return -ENOMEM;
|
|
|
|
edidp = of_get_property(np, "edid", &imxpd->edid_len);
|
|
if (edidp)
|
|
imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL);
|
|
|
|
ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
|
|
if (!ret) {
|
|
if (!strcmp(fmt, "rgb24"))
|
|
bus_format = MEDIA_BUS_FMT_RGB888_1X24;
|
|
else if (!strcmp(fmt, "rgb565"))
|
|
bus_format = MEDIA_BUS_FMT_RGB565_1X16;
|
|
else if (!strcmp(fmt, "bgr666"))
|
|
bus_format = MEDIA_BUS_FMT_RGB666_1X18;
|
|
else if (!strcmp(fmt, "lvds666"))
|
|
bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI;
|
|
}
|
|
imxpd->bus_format = bus_format;
|
|
|
|
/* port@1 is the output port */
|
|
ret = drm_of_find_panel_or_bridge(np, 1, 0, &imxpd->panel, &imxpd->bridge);
|
|
if (ret && ret != -ENODEV)
|
|
return ret;
|
|
|
|
imxpd->dev = dev;
|
|
|
|
ret = imx_pd_register(drm, imxpd);
|
|
if (ret)
|
|
return ret;
|
|
|
|
dev_set_drvdata(dev, imxpd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void imx_pd_unbind(struct device *dev, struct device *master,
|
|
void *data)
|
|
{
|
|
struct imx_parallel_display *imxpd = dev_get_drvdata(dev);
|
|
|
|
if (imxpd->panel)
|
|
drm_panel_detach(imxpd->panel);
|
|
|
|
kfree(imxpd->edid);
|
|
}
|
|
|
|
static const struct component_ops imx_pd_ops = {
|
|
.bind = imx_pd_bind,
|
|
.unbind = imx_pd_unbind,
|
|
};
|
|
|
|
static int imx_pd_probe(struct platform_device *pdev)
|
|
{
|
|
return component_add(&pdev->dev, &imx_pd_ops);
|
|
}
|
|
|
|
static int imx_pd_remove(struct platform_device *pdev)
|
|
{
|
|
component_del(&pdev->dev, &imx_pd_ops);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id imx_pd_dt_ids[] = {
|
|
{ .compatible = "fsl,imx-parallel-display", },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, imx_pd_dt_ids);
|
|
|
|
static struct platform_driver imx_pd_driver = {
|
|
.probe = imx_pd_probe,
|
|
.remove = imx_pd_remove,
|
|
.driver = {
|
|
.of_match_table = imx_pd_dt_ids,
|
|
.name = "imx-parallel-display",
|
|
},
|
|
};
|
|
|
|
module_platform_driver(imx_pd_driver);
|
|
|
|
MODULE_DESCRIPTION("i.MX parallel display driver");
|
|
MODULE_AUTHOR("Sascha Hauer, Pengutronix");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:imx-parallel-display");
|