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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2022 NXP
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <dm/device_compat.h>
#include <panel.h>
#include <reset.h>
#include <video.h>
#include <video_bridge.h>
#include <video_link.h>
#include <asm/io.h>
#include <asm/arch/gpio.h>
#include <dm/device-internal.h>
#include <linux/iopoll.h>
#include <linux/err.h>
#include <media_bus_format.h>
#define DISPLAY_MUX_CTRL 0x60
#define PARALLEL_DISP_FORMAT 0x700
enum imx93_pdf_format {
RGB888_TO_RGB888 = 0x0,
RGB888_TO_RGB666 = 0x1 << 8,
RGB565_TO_RGB565 = 0x2 << 8,
};
struct imx93_pdf_priv {
struct udevice *panel;
struct display_timing adj;
enum imx93_pdf_format format;
void *__iomem addr;
};
static int imx93_pdf_attach(struct udevice *dev)
{
struct imx93_pdf_priv *priv = dev_get_priv(dev);
struct display_timing timings;
int ret;
priv->panel = video_link_get_next_device(dev);
if (!priv->panel ||
device_get_uclass_id(priv->panel) != UCLASS_PANEL) {
dev_err(dev, "get panel device error\n");
return -ENODEV;
}
ret = video_link_get_display_timings(&timings);
if (ret) {
dev_err(dev, "decode display timing error %d\n", ret);
return ret;
}
priv->adj = timings;
writel(priv->format, priv->addr + DISPLAY_MUX_CTRL);
return 0;
}
static int imx93_pdf_check_timing(struct udevice *dev, struct display_timing *timing)
{
struct imx93_pdf_priv *priv = dev_get_priv(dev);
/* Ensure the bridge device attached to panel */
if (!priv->panel) {
dev_err(dev, "%s No panel device attached\n", __func__);
return -ENOTCONN;
}
*timing = priv->adj;
return 0;
}
static int imx93_pdf_probe(struct udevice *dev)
{
struct imx93_pdf_priv *priv = dev_get_priv(dev);
const char *fmt;
u32 bus_format;
int ret;
priv->addr = (void __iomem *)dev_read_addr(dev_get_parent(dev));
if ((fdt_addr_t)priv->addr == FDT_ADDR_T_NONE) {
dev_err(dev, "not able to get addr\n");
return -EINVAL;
}
ret = ofnode_read_string_index(dev_ofnode(dev), "fsl,interface-pix-fmt", 0, &fmt);
if (!ret) {
if (!strcmp(fmt, "rgb565"))
bus_format = MEDIA_BUS_FMT_RGB565_1X16;
else if (!strcmp(fmt, "rgb666"))
bus_format = MEDIA_BUS_FMT_RGB666_1X18;
else if (!strcmp(fmt, "rgb888"))
bus_format = MEDIA_BUS_FMT_RGB888_1X24;
}
switch (bus_format) {
case MEDIA_BUS_FMT_RGB565_1X16:
priv->format = RGB565_TO_RGB565;
break;
case MEDIA_BUS_FMT_RGB666_1X18:
priv->format = RGB888_TO_RGB666;
break;
case MEDIA_BUS_FMT_RGB888_1X24:
priv->format = RGB888_TO_RGB888;
break;
default:
dev_dbg(dev, "invalid bus format 0x%x\n", bus_format);
return -EINVAL;
}
return 0;
}
static int imx93_pdf_remove(struct udevice *dev)
{
struct imx93_pdf_priv *priv = dev_get_priv(dev);
if (priv->panel)
device_remove(priv->panel, DM_REMOVE_NORMAL);
return 0;
}
static int imx93_pdf_set_backlight(struct udevice *dev, int percent)
{
struct imx93_pdf_priv *priv = dev_get_priv(dev);
int ret;
ret = panel_enable_backlight(priv->panel);
if (ret) {
dev_err(dev, "panel %s enable backlight error %d\n", priv->panel->name, ret);
return ret;
}
return 0;
}
struct video_bridge_ops imx93_pdf_ops = {
.attach = imx93_pdf_attach,
.check_timing = imx93_pdf_check_timing,
.set_backlight = imx93_pdf_set_backlight,
};
static const struct udevice_id imx93_pdf_ids[] = {
{ .compatible = "fsl,imx93-parallel-display-format" },
{ }
};
U_BOOT_DRIVER(imx93_pdf_driver) = {
.name = "imx93_pdf_driver",
.id = UCLASS_VIDEO_BRIDGE,
.of_match = imx93_pdf_ids,
.bind = dm_scan_fdt_dev,
.remove = imx93_pdf_remove,
.probe = imx93_pdf_probe,
.ops = &imx93_pdf_ops,
.priv_auto = sizeof(struct imx93_pdf_priv),
};
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