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b362de167d
Split up the driver to make it possible to add support for hw interfaces other than I2C. Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com> Link: https://patch.msgid.link/20251215-st7571-split-v3-5-d5f3205c3138@gmail.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Header file for:
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* Driver for Sitronix ST7571, a 4 level gray scale dot matrix LCD controller
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*
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* Copyright (C) 2025 Marcus Folkesson <marcus.folkesson@gmail.com>
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*/
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#ifndef __ST7571_H__
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#define __ST7571_H__
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#include <drm/drm_connector.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_encoder.h>
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#include <drm/drm_format_helper.h>
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#include <linux/regmap.h>
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enum st7571_color_mode {
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ST7571_COLOR_MODE_GRAY = 0,
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ST7571_COLOR_MODE_BLACKWHITE = 1,
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};
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struct st7571_device;
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struct st7571_panel_constraints {
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u32 min_nlines;
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u32 max_nlines;
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u32 min_ncols;
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u32 max_ncols;
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bool support_grayscale;
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};
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struct st7571_panel_data {
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int (*init)(struct st7571_device *st7571);
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int (*parse_dt)(struct st7571_device *st7571);
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struct st7571_panel_constraints constraints;
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};
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struct st7571_panel_format {
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void (*prepare_buffer)(struct st7571_device *st7571,
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const struct iosys_map *vmap,
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struct drm_framebuffer *fb,
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struct drm_rect *rect,
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struct drm_format_conv_state *fmtcnv_state);
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int (*update_rect)(struct drm_framebuffer *fb, struct drm_rect *rect);
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enum st7571_color_mode mode;
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const u8 nformats;
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const u32 formats[];
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};
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struct st7571_device {
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struct drm_device drm;
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struct device *dev;
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struct drm_plane primary_plane;
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struct drm_crtc crtc;
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struct drm_encoder encoder;
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struct drm_connector connector;
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struct drm_display_mode mode;
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const struct st7571_panel_format *pformat;
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const struct st7571_panel_data *pdata;
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struct gpio_desc *reset;
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struct regmap *regmap;
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bool grayscale;
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bool inverted;
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u32 height_mm;
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u32 width_mm;
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u32 startline;
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u32 nlines;
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u32 ncols;
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u32 bpp;
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/* Intermediate buffer in LCD friendly format */
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u8 *hwbuf;
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/* Row of (transformed) pixels ready to be written to the display */
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u8 *row;
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};
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extern const struct st7571_panel_data st7567_config;
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extern const struct st7571_panel_data st7571_config;
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struct st7571_device *st7571_probe(struct device *dev, struct regmap *regmap);
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void st7571_remove(struct st7571_device *st7571);
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#endif /* __ST7571_H__ */
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