blob: af264f2e2ea47e7813067733e7051db9529ca1f1 (
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
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Header file for:
* Driver for Sitronix ST7571, a 4 level gray scale dot matrix LCD controller
*
* Copyright (C) 2025 Marcus Folkesson <marcus.folkesson@gmail.com>
*/
#ifndef __ST7571_H__
#define __ST7571_H__
#include <drm/drm_connector.h>
#include <drm/drm_crtc.h>
#include <drm/drm_drv.h>
#include <drm/drm_encoder.h>
#include <drm/drm_format_helper.h>
#include <linux/regmap.h>
enum st7571_color_mode {
ST7571_COLOR_MODE_GRAY = 0,
ST7571_COLOR_MODE_BLACKWHITE = 1,
};
struct st7571_device;
struct st7571_panel_constraints {
u32 min_nlines;
u32 max_nlines;
u32 min_ncols;
u32 max_ncols;
bool support_grayscale;
};
struct st7571_panel_data {
int (*init)(struct st7571_device *st7571);
int (*parse_dt)(struct st7571_device *st7571);
struct st7571_panel_constraints constraints;
};
struct st7571_panel_format {
void (*prepare_buffer)(struct st7571_device *st7571,
const struct iosys_map *vmap,
struct drm_framebuffer *fb,
struct drm_rect *rect,
struct drm_format_conv_state *fmtcnv_state);
int (*update_rect)(struct drm_framebuffer *fb, struct drm_rect *rect);
enum st7571_color_mode mode;
const u8 nformats;
const u32 formats[];
};
struct st7571_device {
struct drm_device drm;
struct device *dev;
struct drm_plane primary_plane;
struct drm_crtc crtc;
struct drm_encoder encoder;
struct drm_connector connector;
struct drm_display_mode mode;
const struct st7571_panel_format *pformat;
const struct st7571_panel_data *pdata;
struct gpio_desc *reset;
struct regmap *regmap;
bool grayscale;
bool inverted;
u32 height_mm;
u32 width_mm;
u32 startline;
u32 nlines;
u32 ncols;
u32 bpp;
/* Intermediate buffer in LCD friendly format */
u8 *hwbuf;
/* Row of (transformed) pixels ready to be written to the display */
u8 *row;
};
extern const struct st7571_panel_data st7567_config;
extern const struct st7571_panel_data st7571_config;
struct st7571_device *st7571_probe(struct device *dev, struct regmap *regmap);
void st7571_remove(struct st7571_device *st7571);
#endif /* __ST7571_H__ */
|
