[J-u-boot.git] / common / lcd_simplefb.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Simplefb device tree support
 *
 * (C) Copyright 2015
 * Stephen Warren <[email protected]>
 */

#include <common.h>
#include <dm.h>
#include <lcd.h>
#include <fdt_support.h>
#include <linux/libfdt.h>
#include <video.h>

DECLARE_GLOBAL_DATA_PTR;

static int lcd_dt_simplefb_configure_node(void *blob, int off)
{
	int xsize, ysize;
	int bpix; /* log2 of bits per pixel */
	const char *name;
	ulong fb_base;
#ifdef CONFIG_DM_VIDEO
	struct video_uc_platdata *plat;
	struct video_priv *uc_priv;
	struct udevice *dev;
	int ret;

	ret = uclass_first_device_err(UCLASS_VIDEO, &dev);
	if (ret)
		return ret;
	uc_priv = dev_get_uclass_priv(dev);
	plat = dev_get_uclass_platdata(dev);
	xsize = uc_priv->xsize;
	ysize = uc_priv->ysize;
	bpix = uc_priv->bpix;
	fb_base = plat->base;
#else
	xsize = lcd_get_pixel_width();
	ysize = lcd_get_pixel_height();
	bpix = LCD_BPP;
	fb_base = gd->fb_base;
#endif
	switch (bpix) {
	case 4: /* VIDEO_BPP16 */
		name = "r5g6b5";
		break;
	case 5: /* VIDEO_BPP32 */
		name = "a8r8g8b8";
		break;
	default:
		return -EINVAL;
	}

	return fdt_setup_simplefb_node(blob, off, fb_base, xsize, ysize,
				       xsize * (1 << bpix) / 8, name);
}

int lcd_dt_simplefb_add_node(void *blob)
{
	static const char compat[] = "simple-framebuffer";
	static const char disabled[] = "disabled";
	int off, ret;

	off = fdt_add_subnode(blob, 0, "framebuffer");
	if (off < 0)
		return -1;

	ret = fdt_setprop(blob, off, "status", disabled, sizeof(disabled));
	if (ret < 0)
		return -1;

	ret = fdt_setprop(blob, off, "compatible", compat, sizeof(compat));
	if (ret < 0)
		return -1;

	return lcd_dt_simplefb_configure_node(blob, off);
}

int lcd_dt_simplefb_enable_existing_node(void *blob)
{
	int off;

	off = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer");
	if (off < 0)
		return -1;

	return lcd_dt_simplefb_configure_node(blob, off);
}
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
033167c4 NK	2	/*
	3	* Simplefb device tree support
	4	*
	5	* (C) Copyright 2015
	6	* Stephen Warren <[email protected]>
033167c4 NK	7	*/
	8
	9	#include <common.h>
d08e42a8	10	#include <dm.h>
033167c4 NK	11	#include <lcd.h>
033167c4 NK	12	#include <fdt_support.h>
b08c8c48	13	#include <linux/libfdt.h>
d08e42a8	14	#include <video.h>
033167c4 NK	15
	16	DECLARE_GLOBAL_DATA_PTR;
	17
	18	static int lcd_dt_simplefb_configure_node(void *blob, int off)
	19	{
45261455 SG	20	int xsize, ysize;
	21	int bpix; /* log2 of bits per pixel */
	22	const char *name;
	23	ulong fb_base;
d08e42a8 SG	24	#ifdef CONFIG_DM_VIDEO
	25	struct video_uc_platdata *plat;
	26	struct video_priv *uc_priv;
	27	struct udevice *dev;
	28	int ret;
45261455	29
d08e42a8 SG	30	ret = uclass_first_device_err(UCLASS_VIDEO, &dev);
	31	if (ret)
	32	return ret;
	33	uc_priv = dev_get_uclass_priv(dev);
	34	plat = dev_get_uclass_platdata(dev);
	35	xsize = uc_priv->xsize;
	36	ysize = uc_priv->ysize;
	37	bpix = uc_priv->bpix;
	38	fb_base = plat->base;
	39	#else
45261455 SG	40	xsize = lcd_get_pixel_width();
	41	ysize = lcd_get_pixel_height();
	42	bpix = LCD_BPP;
	43	fb_base = gd->fb_base;
d08e42a8	44	#endif
45261455 SG	45	switch (bpix) {
	46	case 4: /* VIDEO_BPP16 */
	47	name = "r5g6b5";
	48	break;
	49	case 5: /* VIDEO_BPP32 */
	50	name = "a8r8g8b8";
	51	break;
	52	default:
	53	return -EINVAL;
	54	}
	55
	56	return fdt_setup_simplefb_node(blob, off, fb_base, xsize, ysize,
	57	xsize * (1 << bpix) / 8, name);
033167c4 NK	58	}
	59
	60	int lcd_dt_simplefb_add_node(void *blob)
	61	{
	62	static const char compat[] = "simple-framebuffer";
	63	static const char disabled[] = "disabled";
	64	int off, ret;
	65
	66	off = fdt_add_subnode(blob, 0, "framebuffer");
	67	if (off < 0)
	68	return -1;
	69
	70	ret = fdt_setprop(blob, off, "status", disabled, sizeof(disabled));
	71	if (ret < 0)
	72	return -1;
	73
	74	ret = fdt_setprop(blob, off, "compatible", compat, sizeof(compat));
	75	if (ret < 0)
	76	return -1;
	77
	78	return lcd_dt_simplefb_configure_node(blob, off);
	79	}
	80
	81	int lcd_dt_simplefb_enable_existing_node(void *blob)
	82	{
	83	int off;
	84
	85	off = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer");
	86	if (off < 0)
	87	return -1;
	88
	89	return lcd_dt_simplefb_configure_node(blob, off);
	90	}