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45b58669e5
Drivers are not allowed to fail after drm_atomic_helper_swap_state() has been called and the new atomic state is stored into the current sw state. Since the struct ssd130x_device .data_array is allocated in the encoder's .atomic_enable callback, the operation can fail and this is after the new state has been stored. So it can break an atomic mode settings assumption. Fix this by having custom helpers to allocate, duplicate and destroy the plane state, that will take care of allocating and freeing these buffers. Suggested-by: Maxime Ripard <mripard@kernel.org> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> Acked-by: Maxime Ripard <mripard@kernel.org> Tested-by: Geert Uytterhoeven <geert@linux-m68k.org> Link: https://patchwork.freedesktop.org/patch/msgid/20230726105433.389740-2-javierm@redhat.com
101 lines
2.1 KiB
C
101 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Header file for:
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* DRM driver for Solomon SSD130x OLED displays
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*
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* Copyright 2022 Red Hat Inc.
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* Author: Javier Martinez Canillas <javierm@redhat.com>
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*
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* Based on drivers/video/fbdev/ssd1307fb.c
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* Copyright 2012 Free Electrons
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*/
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#ifndef __SSD130X_H__
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#define __SSD130X_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_plane_helper.h>
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#include <linux/regmap.h>
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#define SSD130X_DATA 0x40
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#define SSD130X_COMMAND 0x80
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enum ssd130x_variants {
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SH1106_ID,
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SSD1305_ID,
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SSD1306_ID,
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SSD1307_ID,
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SSD1309_ID,
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NR_SSD130X_VARIANTS
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};
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struct ssd130x_deviceinfo {
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u32 default_vcomh;
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u32 default_dclk_div;
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u32 default_dclk_frq;
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u32 default_width;
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u32 default_height;
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u32 page_height;
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int need_pwm;
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int need_chargepump;
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bool page_mode_only;
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};
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struct ssd130x_device {
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struct drm_device drm;
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struct device *dev;
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struct drm_display_mode mode;
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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 i2c_client *client;
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struct regmap *regmap;
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const struct ssd130x_deviceinfo *device_info;
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unsigned page_address_mode : 1;
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unsigned area_color_enable : 1;
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unsigned com_invdir : 1;
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unsigned com_lrremap : 1;
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unsigned com_seq : 1;
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unsigned lookup_table_set : 1;
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unsigned low_power : 1;
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unsigned seg_remap : 1;
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u32 com_offset;
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u32 contrast;
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u32 dclk_div;
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u32 dclk_frq;
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u32 height;
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u8 lookup_table[4];
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u32 page_offset;
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u32 col_offset;
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u32 prechargep1;
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u32 prechargep2;
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struct backlight_device *bl_dev;
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struct pwm_device *pwm;
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struct gpio_desc *reset;
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struct regulator *vcc_reg;
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u32 vcomh;
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u32 width;
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/* Cached address ranges */
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u8 col_start;
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u8 col_end;
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u8 page_start;
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u8 page_end;
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};
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extern const struct ssd130x_deviceinfo ssd130x_variants[];
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struct ssd130x_device *ssd130x_probe(struct device *dev, struct regmap *regmap);
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void ssd130x_remove(struct ssd130x_device *ssd130x);
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void ssd130x_shutdown(struct ssd130x_device *ssd130x);
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#endif /* __SSD130X_H__ */
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