mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-25 02:09:42 +00:00
![Philipp Zabel](/assets/img/avatar_default.png)
Similarly to commit 5e501ed725
("drm/imx: imx-ldb: allow to determine
bus format from the connected panel"), if a panel is connected to the ldb
output port via the of_graph bindings, the data mapping is determined from
the display_info.bus_format field provided by the panel instead of from the
optional interface_pix_fmt device tree property.
Reported-by: Ulrich Ölmann <u.oelmann@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Gary Bisson <gary.bisson@boundarydevices.com>
316 lines
8.2 KiB
C
316 lines
8.2 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_fb_helper.h>
|
|
#include <drm/drm_crtc_helper.h>
|
|
#include <drm/drm_panel.h>
|
|
#include <linux/videodev2.h>
|
|
#include <video/of_display_timing.h>
|
|
#include <linux/of_graph.h>
|
|
|
|
#include "imx-drm.h"
|
|
|
|
#define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector)
|
|
#define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder)
|
|
|
|
struct imx_parallel_display {
|
|
struct drm_connector connector;
|
|
struct drm_encoder encoder;
|
|
struct device *dev;
|
|
void *edid;
|
|
int edid_len;
|
|
u32 bus_format;
|
|
int mode_valid;
|
|
struct drm_display_mode mode;
|
|
struct drm_panel *panel;
|
|
};
|
|
|
|
static enum drm_connector_status imx_pd_connector_detect(
|
|
struct drm_connector *connector, bool force)
|
|
{
|
|
return connector_status_connected;
|
|
}
|
|
|
|
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) {
|
|
struct drm_display_info *di = &connector->display_info;
|
|
|
|
num_modes = imxpd->panel->funcs->get_modes(imxpd->panel);
|
|
if (!imxpd->bus_format && di->num_bus_formats)
|
|
imxpd->bus_format = di->bus_formats[0];
|
|
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 (imxpd->mode_valid) {
|
|
struct drm_display_mode *mode = drm_mode_create(connector->dev);
|
|
|
|
if (!mode)
|
|
return -EINVAL;
|
|
drm_mode_copy(mode, &imxpd->mode);
|
|
mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
|
|
drm_mode_probed_add(connector, mode);
|
|
num_modes++;
|
|
}
|
|
|
|
if (np) {
|
|
struct drm_display_mode *mode = drm_mode_create(connector->dev);
|
|
|
|
if (!mode)
|
|
return -EINVAL;
|
|
of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE);
|
|
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_dpms(struct drm_encoder *encoder, int mode)
|
|
{
|
|
struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
|
|
|
|
if (mode != DRM_MODE_DPMS_ON)
|
|
drm_panel_disable(imxpd->panel);
|
|
else
|
|
drm_panel_enable(imxpd->panel);
|
|
}
|
|
|
|
static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder,
|
|
const struct drm_display_mode *mode,
|
|
struct drm_display_mode *adjusted_mode)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
|
|
{
|
|
struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
|
|
|
|
imx_drm_set_bus_format(encoder, imxpd->bus_format);
|
|
}
|
|
|
|
static void imx_pd_encoder_commit(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_mode_set(struct drm_encoder *encoder,
|
|
struct drm_display_mode *orig_mode,
|
|
struct drm_display_mode *mode)
|
|
{
|
|
}
|
|
|
|
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 struct drm_connector_funcs imx_pd_connector_funcs = {
|
|
.dpms = drm_helper_connector_dpms,
|
|
.fill_modes = drm_helper_probe_single_connector_modes,
|
|
.detect = imx_pd_connector_detect,
|
|
.destroy = imx_drm_connector_destroy,
|
|
};
|
|
|
|
static 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 struct drm_encoder_funcs imx_pd_encoder_funcs = {
|
|
.destroy = imx_drm_encoder_destroy,
|
|
};
|
|
|
|
static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
|
|
.dpms = imx_pd_encoder_dpms,
|
|
.mode_fixup = imx_pd_encoder_mode_fixup,
|
|
.prepare = imx_pd_encoder_prepare,
|
|
.commit = imx_pd_encoder_commit,
|
|
.mode_set = imx_pd_encoder_mode_set,
|
|
.disable = imx_pd_encoder_disable,
|
|
};
|
|
|
|
static int imx_pd_register(struct drm_device *drm,
|
|
struct imx_parallel_display *imxpd)
|
|
{
|
|
int ret;
|
|
|
|
ret = imx_drm_encoder_parse_of(drm, &imxpd->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(&imxpd->encoder, &imx_pd_encoder_helper_funcs);
|
|
drm_encoder_init(drm, &imxpd->encoder, &imx_pd_encoder_funcs,
|
|
DRM_MODE_ENCODER_NONE);
|
|
|
|
drm_connector_helper_add(&imxpd->connector,
|
|
&imx_pd_connector_helper_funcs);
|
|
drm_connector_init(drm, &imxpd->connector, &imx_pd_connector_funcs,
|
|
DRM_MODE_CONNECTOR_VGA);
|
|
|
|
if (imxpd->panel)
|
|
drm_panel_attach(imxpd->panel, &imxpd->connector);
|
|
|
|
drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder);
|
|
|
|
imxpd->connector.encoder = &imxpd->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;
|
|
struct device_node *port;
|
|
const u8 *edidp;
|
|
struct imx_parallel_display *imxpd;
|
|
int ret;
|
|
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"))
|
|
imxpd->bus_format = MEDIA_BUS_FMT_RGB888_1X24;
|
|
else if (!strcmp(fmt, "rgb565"))
|
|
imxpd->bus_format = MEDIA_BUS_FMT_RGB565_1X16;
|
|
else if (!strcmp(fmt, "bgr666"))
|
|
imxpd->bus_format = MEDIA_BUS_FMT_RGB666_1X18;
|
|
else if (!strcmp(fmt, "lvds666"))
|
|
imxpd->bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI;
|
|
}
|
|
|
|
/* port@1 is the output port */
|
|
port = of_graph_get_port_by_id(np, 1);
|
|
if (port) {
|
|
struct device_node *endpoint, *remote;
|
|
|
|
endpoint = of_get_child_by_name(port, "endpoint");
|
|
if (endpoint) {
|
|
remote = of_graph_get_remote_port_parent(endpoint);
|
|
if (remote)
|
|
imxpd->panel = of_drm_find_panel(remote);
|
|
if (!imxpd->panel)
|
|
return -EPROBE_DEFER;
|
|
}
|
|
}
|
|
|
|
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);
|
|
|
|
imxpd->encoder.funcs->destroy(&imxpd->encoder);
|
|
imxpd->connector.funcs->destroy(&imxpd->connector);
|
|
|
|
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");
|