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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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440961d209
struct mipi_dbi is going to be split into an interface part and a display pipeline part. The interface part can be used by drivers that need to initialize the controller, but that won't upload the framebuffer over this interface. tinydrm uses the variable name 'mipi' but this is not a good name since MIPI refers to a lot of standards. This patch changes the variable name to 'dbidev' where it refers to the pipeline part of struct mipi_dbi. Cc: Eric Anholt <eric@anholt.net> Cc: David Lechner <david@lechnology.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Acked-by: David Lechner <david@lechnology.com> Acked-by: Eric Anholt <eric@anholt.net> Link: https://patchwork.freedesktop.org/patch/msgid/20190722104312.16184-4-noralf@tronnes.org
136 lines
4.0 KiB
C
136 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* MIPI Display Bus Interface (DBI) LCD controller support
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*
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* Copyright 2016 Noralf Trønnes
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*/
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#ifndef __LINUX_MIPI_DBI_H
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#define __LINUX_MIPI_DBI_H
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#include <linux/mutex.h>
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#include <drm/drm_device.h>
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#include <drm/drm_simple_kms_helper.h>
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struct drm_rect;
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struct spi_device;
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struct gpio_desc;
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struct regulator;
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/**
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* struct mipi_dbi - MIPI DBI controller
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* @spi: SPI device
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* @enabled: Pipeline is enabled
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* @cmdlock: Command lock
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* @command: Bus specific callback executing commands.
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* @read_commands: Array of read commands terminated by a zero entry.
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* Reading is disabled if this is NULL.
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* @dc: Optional D/C gpio.
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* @tx_buf: Buffer used for transfer (copy clip rect area)
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* @tx_buf9: Buffer used for Option 1 9-bit conversion
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* @tx_buf9_len: Size of tx_buf9.
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* @swap_bytes: Swap bytes in buffer before transfer
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* @reset: Optional reset gpio
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* @rotation: initial rotation in degrees Counter Clock Wise
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* @backlight: backlight device (optional)
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* @regulator: power regulator (optional)
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*/
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struct mipi_dbi {
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/**
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* @drm: DRM device
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*/
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struct drm_device drm;
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/**
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* @pipe: Display pipe structure
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*/
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struct drm_simple_display_pipe pipe;
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/**
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* @connector: Connector
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*/
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struct drm_connector connector;
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/**
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* @mode: Fixed display mode
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*/
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struct drm_display_mode mode;
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struct spi_device *spi;
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bool enabled;
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struct mutex cmdlock;
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int (*command)(struct mipi_dbi *dbi, u8 *cmd, u8 *param, size_t num);
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const u8 *read_commands;
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struct gpio_desc *dc;
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u16 *tx_buf;
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void *tx_buf9;
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size_t tx_buf9_len;
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bool swap_bytes;
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struct gpio_desc *reset;
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unsigned int rotation;
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struct backlight_device *backlight;
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struct regulator *regulator;
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};
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static inline struct mipi_dbi *drm_to_mipi_dbi(struct drm_device *drm)
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{
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return container_of(drm, struct mipi_dbi, drm);
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}
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int mipi_dbi_spi_init(struct spi_device *spi, struct mipi_dbi *dbi,
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struct gpio_desc *dc);
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int mipi_dbi_init_with_formats(struct mipi_dbi *dbidev,
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const struct drm_simple_display_pipe_funcs *funcs,
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const uint32_t *formats, unsigned int format_count,
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const struct drm_display_mode *mode,
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unsigned int rotation, size_t tx_buf_size);
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int mipi_dbi_init(struct mipi_dbi *dbidev,
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const struct drm_simple_display_pipe_funcs *funcs,
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const struct drm_display_mode *mode, unsigned int rotation);
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void mipi_dbi_release(struct drm_device *drm);
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void mipi_dbi_pipe_update(struct drm_simple_display_pipe *pipe,
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struct drm_plane_state *old_state);
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void mipi_dbi_enable_flush(struct mipi_dbi *dbidev,
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struct drm_crtc_state *crtc_state,
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struct drm_plane_state *plan_state);
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void mipi_dbi_pipe_disable(struct drm_simple_display_pipe *pipe);
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void mipi_dbi_hw_reset(struct mipi_dbi *dbi);
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bool mipi_dbi_display_is_on(struct mipi_dbi *dbi);
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int mipi_dbi_poweron_reset(struct mipi_dbi *dbidev);
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int mipi_dbi_poweron_conditional_reset(struct mipi_dbi *dbidev);
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u32 mipi_dbi_spi_cmd_max_speed(struct spi_device *spi, size_t len);
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int mipi_dbi_spi_transfer(struct spi_device *spi, u32 speed_hz,
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u8 bpw, const void *buf, size_t len);
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int mipi_dbi_command_read(struct mipi_dbi *dbi, u8 cmd, u8 *val);
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int mipi_dbi_command_buf(struct mipi_dbi *dbi, u8 cmd, u8 *data, size_t len);
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int mipi_dbi_command_stackbuf(struct mipi_dbi *dbi, u8 cmd, u8 *data, size_t len);
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int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb,
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struct drm_rect *clip, bool swap);
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/**
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* mipi_dbi_command - MIPI DCS command with optional parameter(s)
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* @dbi: MIPI DBI structure
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* @cmd: Command
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* @seq...: Optional parameter(s)
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*
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* Send MIPI DCS command to the controller. Use mipi_dbi_command_read() for
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* get/read.
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*
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* Returns:
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* Zero on success, negative error code on failure.
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*/
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#define mipi_dbi_command(dbi, cmd, seq...) \
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({ \
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u8 d[] = { seq }; \
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mipi_dbi_command_stackbuf(dbi, cmd, d, ARRAY_SIZE(d)); \
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})
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#ifdef CONFIG_DEBUG_FS
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int mipi_dbi_debugfs_init(struct drm_minor *minor);
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#else
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#define mipi_dbi_debugfs_init NULL
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#endif
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#endif /* __LINUX_MIPI_DBI_H */
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