summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/pl111/pl111_versatile.c
blob: 97d4af6925a3a3ece50a842339c171b38c9779e5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
#include <linux/device.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
#include <linux/bitops.h>
#include <linux/module.h>
#include <drm/drmP.h>
#include "pl111_versatile.h"
#include "pl111_drm.h"

static struct regmap *versatile_syscon_map;

/*
 * We detect the different syscon types from the compatible strings.
 */
enum versatile_clcd {
	INTEGRATOR_CLCD_CM,
	VERSATILE_CLCD,
	REALVIEW_CLCD_EB,
	REALVIEW_CLCD_PB1176,
	REALVIEW_CLCD_PB11MP,
	REALVIEW_CLCD_PBA8,
	REALVIEW_CLCD_PBX,
};

static const struct of_device_id versatile_clcd_of_match[] = {
	{
		.compatible = "arm,core-module-integrator",
		.data = (void *)INTEGRATOR_CLCD_CM,
	},
	{
		.compatible = "arm,versatile-sysreg",
		.data = (void *)VERSATILE_CLCD,
	},
	{
		.compatible = "arm,realview-eb-syscon",
		.data = (void *)REALVIEW_CLCD_EB,
	},
	{
		.compatible = "arm,realview-pb1176-syscon",
		.data = (void *)REALVIEW_CLCD_PB1176,
	},
	{
		.compatible = "arm,realview-pb11mp-syscon",
		.data = (void *)REALVIEW_CLCD_PB11MP,
	},
	{
		.compatible = "arm,realview-pba8-syscon",
		.data = (void *)REALVIEW_CLCD_PBA8,
	},
	{
		.compatible = "arm,realview-pbx-syscon",
		.data = (void *)REALVIEW_CLCD_PBX,
	},
	{},
};

/*
 * Core module CLCD control on the Integrator/CP, bits
 * 8 thru 19 of the CM_CONTROL register controls a bunch
 * of CLCD settings.
 */
#define INTEGRATOR_HDR_CTRL_OFFSET	0x0C
#define INTEGRATOR_CLCD_LCDBIASEN	BIT(8)
#define INTEGRATOR_CLCD_LCDBIASUP	BIT(9)
#define INTEGRATOR_CLCD_LCDBIASDN	BIT(10)
/* Bits 11,12,13 controls the LCD type */
#define INTEGRATOR_CLCD_LCDMUX_MASK	(BIT(11)|BIT(12)|BIT(13))
#define INTEGRATOR_CLCD_LCDMUX_LCD24	BIT(11)
#define INTEGRATOR_CLCD_LCDMUX_VGA565	BIT(12)
#define INTEGRATOR_CLCD_LCDMUX_SHARP	(BIT(11)|BIT(12))
#define INTEGRATOR_CLCD_LCDMUX_VGA555	BIT(13)
#define INTEGRATOR_CLCD_LCDMUX_VGA24	(BIT(11)|BIT(12)|BIT(13))
#define INTEGRATOR_CLCD_LCD0_EN		BIT(14)
#define INTEGRATOR_CLCD_LCD1_EN		BIT(15)
/* R/L flip on Sharp */
#define INTEGRATOR_CLCD_LCD_STATIC1	BIT(16)
/* U/D flip on Sharp */
#define INTEGRATOR_CLCD_LCD_STATIC2	BIT(17)
/* No connection on Sharp */
#define INTEGRATOR_CLCD_LCD_STATIC	BIT(18)
/* 0 = 24bit VGA, 1 = 18bit VGA */
#define INTEGRATOR_CLCD_LCD_N24BITEN	BIT(19)

#define INTEGRATOR_CLCD_MASK		(INTEGRATOR_CLCD_LCDBIASEN | \
					 INTEGRATOR_CLCD_LCDBIASUP | \
					 INTEGRATOR_CLCD_LCDBIASDN | \
					 INTEGRATOR_CLCD_LCDMUX_MASK | \
					 INTEGRATOR_CLCD_LCD0_EN | \
					 INTEGRATOR_CLCD_LCD1_EN | \
					 INTEGRATOR_CLCD_LCD_STATIC1 | \
					 INTEGRATOR_CLCD_LCD_STATIC2 | \
					 INTEGRATOR_CLCD_LCD_STATIC | \
					 INTEGRATOR_CLCD_LCD_N24BITEN)

static void pl111_integrator_enable(struct drm_device *drm, u32 format)
{
	u32 val;

	dev_info(drm->dev, "enable Integrator CLCD connectors\n");

	/* FIXME: really needed? */
	val = INTEGRATOR_CLCD_LCD_STATIC1 | INTEGRATOR_CLCD_LCD_STATIC2 |
		INTEGRATOR_CLCD_LCD0_EN | INTEGRATOR_CLCD_LCD1_EN;

	switch (format) {
	case DRM_FORMAT_XBGR8888:
	case DRM_FORMAT_XRGB8888:
		break;
	case DRM_FORMAT_BGR565:
	case DRM_FORMAT_RGB565:
		/* truecolor RGB565 */
		val |= INTEGRATOR_CLCD_LCDMUX_VGA565;
		break;
	case DRM_FORMAT_XBGR1555:
	case DRM_FORMAT_XRGB1555:
		/* Pseudocolor, RGB555, BGR555 */
		val |= INTEGRATOR_CLCD_LCDMUX_VGA555;
		break;
	default:
		dev_err(drm->dev, "unhandled format on Integrator 0x%08x\n",
			format);
		break;
	}

	regmap_update_bits(versatile_syscon_map,
			   INTEGRATOR_HDR_CTRL_OFFSET,
			   INTEGRATOR_CLCD_MASK,
			   val);
}

/*
 * This configuration register in the Versatile and RealView
 * family is uniformly present but appears more and more
 * unutilized starting with the RealView series.
 */
#define SYS_CLCD			0x50
#define SYS_CLCD_MODE_MASK		(BIT(0)|BIT(1))
#define SYS_CLCD_MODE_888		0
#define SYS_CLCD_MODE_5551		BIT(0)
#define SYS_CLCD_MODE_565_R_LSB		BIT(1)
#define SYS_CLCD_MODE_565_B_LSB		(BIT(0)|BIT(1))
#define SYS_CLCD_CONNECTOR_MASK		(BIT(2)|BIT(3)|BIT(4)|BIT(5))
#define SYS_CLCD_NLCDIOON		BIT(2)
#define SYS_CLCD_VDDPOSSWITCH		BIT(3)
#define SYS_CLCD_PWR3V5SWITCH		BIT(4)
#define SYS_CLCD_VDDNEGSWITCH		BIT(5)

static void pl111_versatile_disable(struct drm_device *drm)
{
	dev_info(drm->dev, "disable Versatile CLCD connectors\n");
	regmap_update_bits(versatile_syscon_map,
			   SYS_CLCD,
			   SYS_CLCD_CONNECTOR_MASK,
			   0);
}

static void pl111_versatile_enable(struct drm_device *drm, u32 format)
{
	u32 val = 0;

	dev_info(drm->dev, "enable Versatile CLCD connectors\n");

	switch (format) {
	case DRM_FORMAT_ABGR8888:
	case DRM_FORMAT_XBGR8888:
	case DRM_FORMAT_ARGB8888:
	case DRM_FORMAT_XRGB8888:
		val |= SYS_CLCD_MODE_888;
		break;
	case DRM_FORMAT_BGR565:
		val |= SYS_CLCD_MODE_565_R_LSB;
		break;
	case DRM_FORMAT_RGB565:
		val |= SYS_CLCD_MODE_565_B_LSB;
		break;
	case DRM_FORMAT_ABGR1555:
	case DRM_FORMAT_XBGR1555:
	case DRM_FORMAT_ARGB1555:
	case DRM_FORMAT_XRGB1555:
		val |= SYS_CLCD_MODE_5551;
		break;
	default:
		dev_err(drm->dev, "unhandled format on Versatile 0x%08x\n",
			format);
		break;
	}

	/* Set up the MUX */
	regmap_update_bits(versatile_syscon_map,
			   SYS_CLCD,
			   SYS_CLCD_MODE_MASK,
			   val);

	/* Then enable the display */
	regmap_update_bits(versatile_syscon_map,
			   SYS_CLCD,
			   SYS_CLCD_CONNECTOR_MASK,
			   SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH);
}

static void pl111_realview_clcd_disable(struct drm_device *drm)
{
	dev_info(drm->dev, "disable RealView CLCD connectors\n");
	regmap_update_bits(versatile_syscon_map,
			   SYS_CLCD,
			   SYS_CLCD_CONNECTOR_MASK,
			   0);
}

static void pl111_realview_clcd_enable(struct drm_device *drm, u32 format)
{
	dev_info(drm->dev, "enable RealView CLCD connectors\n");
	regmap_update_bits(versatile_syscon_map,
			   SYS_CLCD,
			   SYS_CLCD_CONNECTOR_MASK,
			   SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH);
}

int pl111_versatile_init(struct device *dev, struct pl111_drm_dev_private *priv)
{
	const struct of_device_id *clcd_id;
	enum versatile_clcd versatile_clcd_type;
	struct device_node *np;
	struct regmap *map;

	np = of_find_matching_node_and_match(NULL, versatile_clcd_of_match,
					     &clcd_id);
	if (!np) {
		/* Non-ARM reference designs, just bail out */
		return 0;
	}
	versatile_clcd_type = (enum versatile_clcd)clcd_id->data;

	map = syscon_node_to_regmap(np);
	if (IS_ERR(map)) {
		dev_err(dev, "no Versatile syscon regmap\n");
		return PTR_ERR(map);
	}

	switch (versatile_clcd_type) {
	case INTEGRATOR_CLCD_CM:
		versatile_syscon_map = map;
		priv->variant_display_enable = pl111_integrator_enable;
		dev_info(dev, "set up callbacks for Integrator PL110\n");
		break;
	case VERSATILE_CLCD:
		versatile_syscon_map = map;
		priv->variant_display_enable = pl111_versatile_enable;
		priv->variant_display_disable = pl111_versatile_disable;
		dev_info(dev, "set up callbacks for Versatile PL110+\n");
		break;
	case REALVIEW_CLCD_EB:
	case REALVIEW_CLCD_PB1176:
	case REALVIEW_CLCD_PB11MP:
	case REALVIEW_CLCD_PBA8:
	case REALVIEW_CLCD_PBX:
		versatile_syscon_map = map;
		priv->variant_display_enable = pl111_realview_clcd_enable;
		priv->variant_display_disable = pl111_realview_clcd_disable;
		dev_info(dev, "set up callbacks for RealView PL111\n");
		break;
	default:
		dev_info(dev, "unknown Versatile system controller\n");
		break;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(pl111_versatile_init);