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// SPDX-License-Identifier: GPL-2.0+
/*
* OMAP panel support
*
* Copyright (C) 2020 Dario Binacchi <dariobin@libero.it>
*/
#include <common.h>
#include <backlight.h>
#include <clk.h>
#include <display.h>
#include <dm.h>
#include <dm/device_compat.h>
#include <log.h>
#include <panel.h>
#include <asm/gpio.h>
#include <linux/err.h>
#include "tilcdc.h"
struct tilcdc_panel_priv {
struct tilcdc_panel_info info;
struct display_timing timing;
struct udevice *backlight;
struct gpio_desc enable;
};
static int tilcdc_panel_enable_backlight(struct udevice *dev)
{
struct tilcdc_panel_priv *priv = dev_get_priv(dev);
if (dm_gpio_is_valid(&priv->enable))
dm_gpio_set_value(&priv->enable, 1);
if (priv->backlight)
return backlight_enable(priv->backlight);
return 0;
}
static int tilcdc_panel_set_backlight(struct udevice *dev, int percent)
{
struct tilcdc_panel_priv *priv = dev_get_priv(dev);
if (dm_gpio_is_valid(&priv->enable))
dm_gpio_set_value(&priv->enable, 1);
if (priv->backlight)
return backlight_set_brightness(priv->backlight, percent);
return 0;
}
int tilcdc_panel_get_display_info(struct udevice *dev,
struct tilcdc_panel_info *info)
{
struct tilcdc_panel_priv *priv = dev_get_priv(dev);
memcpy(info, &priv->info, sizeof(*info));
return 0;
}
static int tilcdc_panel_get_display_timing(struct udevice *dev,
struct display_timing *timing)
{
struct tilcdc_panel_priv *priv = dev_get_priv(dev);
memcpy(timing, &priv->timing, sizeof(*timing));
return 0;
}
static int tilcdc_panel_remove(struct udevice *dev)
{
struct tilcdc_panel_priv *priv = dev_get_priv(dev);
if (dm_gpio_is_valid(&priv->enable))
dm_gpio_free(dev, &priv->enable);
return 0;
}
static int tilcdc_panel_probe(struct udevice *dev)
{
struct tilcdc_panel_priv *priv = dev_get_priv(dev);
int err;
err = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
"backlight", &priv->backlight);
if (err)
dev_warn(dev, "failed to get backlight\n");
err = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable,
GPIOD_IS_OUT);
if (err) {
dev_warn(dev, "failed to get enable GPIO\n");
if (err != -ENOENT)
return err;
}
return 0;
}
static int tilcdc_panel_of_to_plat(struct udevice *dev)
{
struct tilcdc_panel_priv *priv = dev_get_priv(dev);
ofnode node;
int err;
err = ofnode_decode_display_timing(dev_ofnode(dev), 0, &priv->timing);
if (err) {
dev_err(dev, "failed to get display timing\n");
return err;
}
node = dev_read_subnode(dev, "panel-info");
if (!ofnode_valid(node)) {
dev_err(dev, "missing 'panel-info' node\n");
return -ENXIO;
}
err |= ofnode_read_u32(node, "ac-bias", &priv->info.ac_bias);
err |= ofnode_read_u32(node, "ac-bias-intrpt",
&priv->info.ac_bias_intrpt);
err |= ofnode_read_u32(node, "dma-burst-sz", &priv->info.dma_burst_sz);
err |= ofnode_read_u32(node, "bpp", &priv->info.bpp);
err |= ofnode_read_u32(node, "fdd", &priv->info.fdd);
err |= ofnode_read_u32(node, "sync-edge", &priv->info.sync_edge);
err |= ofnode_read_u32(node, "sync-ctrl", &priv->info.sync_ctrl);
err |= ofnode_read_u32(node, "raster-order", &priv->info.raster_order);
err |= ofnode_read_u32(node, "fifo-th", &priv->info.fifo_th);
if (err) {
dev_err(dev, "failed to get panel info\n");
return err;
}
/* optional */
priv->info.tft_alt_mode = ofnode_read_bool(node, "tft-alt-mode");
priv->info.invert_pxl_clk = ofnode_read_bool(node, "invert-pxl-clk");
dev_dbg(dev, "LCD: %dx%d, bpp=%d, clk=%d Hz\n",
priv->timing.hactive.typ, priv->timing.vactive.typ,
priv->info.bpp, priv->timing.pixelclock.typ);
dev_dbg(dev, " hbp=%d, hfp=%d, hsw=%d\n",
priv->timing.hback_porch.typ, priv->timing.hfront_porch.typ,
priv->timing.hsync_len.typ);
dev_dbg(dev, " vbp=%d, vfp=%d, vsw=%d\n",
priv->timing.vback_porch.typ, priv->timing.vfront_porch.typ,
priv->timing.vsync_len.typ);
return 0;
}
static const struct panel_ops tilcdc_panel_ops = {
.enable_backlight = tilcdc_panel_enable_backlight,
.set_backlight = tilcdc_panel_set_backlight,
.get_display_timing = tilcdc_panel_get_display_timing,
};
static const struct udevice_id tilcdc_panel_ids[] = {
{.compatible = "ti,tilcdc,panel"},
{}
};
U_BOOT_DRIVER(tilcdc_panel) = {
.name = "tilcdc_panel",
.id = UCLASS_PANEL,
.of_match = tilcdc_panel_ids,
.ops = &tilcdc_panel_ops,
.ofdata_to_platdata = tilcdc_panel_of_to_plat,
.probe = tilcdc_panel_probe,
.remove = tilcdc_panel_remove,
.priv_auto = sizeof(struct tilcdc_panel_priv),
};
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