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

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

#include <common.h>
#include <dm.h>
#include <lcd.h>
#include <fdt_support.h>
#include <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
033167c4 NK	1	/*
	2	* Simplefb device tree support
	3	*
	4	* (C) Copyright 2015
	5	* Stephen Warren <[email protected]>
	6	*
	7	* SPDX-License-Identifier: GPL-2.0+
	8	*/
	9
	10	#include <common.h>
d08e42a8	11	#include <dm.h>
033167c4 NK	12	#include <lcd.h>
	13	#include <fdt_support.h>
	14	#include <libfdt.h>
d08e42a8	15	#include <video.h>
033167c4 NK	16
	17	DECLARE_GLOBAL_DATA_PTR;
	18
	19	static int lcd_dt_simplefb_configure_node(void *blob, int off)
	20	{
45261455 SG	21	int xsize, ysize;
	22	int bpix; /* log2 of bits per pixel */
	23	const char *name;
	24	ulong fb_base;
d08e42a8 SG	25	#ifdef CONFIG_DM_VIDEO
	26	struct video_uc_platdata *plat;
	27	struct video_priv *uc_priv;
	28	struct udevice *dev;
	29	int ret;
45261455	30
d08e42a8 SG	31	ret = uclass_first_device_err(UCLASS_VIDEO, &dev);
	32	if (ret)
	33	return ret;
	34	uc_priv = dev_get_uclass_priv(dev);
	35	plat = dev_get_uclass_platdata(dev);
	36	xsize = uc_priv->xsize;
	37	ysize = uc_priv->ysize;
	38	bpix = uc_priv->bpix;
	39	fb_base = plat->base;
	40	#else
45261455 SG	41	xsize = lcd_get_pixel_width();
	42	ysize = lcd_get_pixel_height();
	43	bpix = LCD_BPP;
	44	fb_base = gd->fb_base;
d08e42a8	45	#endif
45261455 SG	46	switch (bpix) {
	47	case 4: /* VIDEO_BPP16 */
	48	name = "r5g6b5";
	49	break;
	50	case 5: /* VIDEO_BPP32 */
	51	name = "a8r8g8b8";
	52	break;
	53	default:
	54	return -EINVAL;
	55	}
	56
	57	return fdt_setup_simplefb_node(blob, off, fb_base, xsize, ysize,
	58	xsize * (1 << bpix) / 8, name);
033167c4 NK	59	}
	60
	61	int lcd_dt_simplefb_add_node(void *blob)
	62	{
	63	static const char compat[] = "simple-framebuffer";
	64	static const char disabled[] = "disabled";
	65	int off, ret;
	66
	67	off = fdt_add_subnode(blob, 0, "framebuffer");
	68	if (off < 0)
	69	return -1;
	70
	71	ret = fdt_setprop(blob, off, "status", disabled, sizeof(disabled));
	72	if (ret < 0)
	73	return -1;
	74
	75	ret = fdt_setprop(blob, off, "compatible", compat, sizeof(compat));
	76	if (ret < 0)
	77	return -1;
	78
	79	return lcd_dt_simplefb_configure_node(blob, off);
	80	}
	81
	82	int lcd_dt_simplefb_enable_existing_node(void *blob)
	83	{
	84	int off;
	85
	86	off = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer");
	87	if (off < 0)
	88	return -1;
	89
	90	return lcd_dt_simplefb_configure_node(blob, off);
	91	}