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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* exynos_drm_drv.h
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* Authors:
* Inki Dae <>
* Joonyoung Shim <>
* Seung-Woo Kim <>
#ifndef _EXYNOS_DRM_DRV_H_
#define _EXYNOS_DRM_DRV_H_
#include <linux/module.h>
#include <drm/drm_crtc.h>
#include <drm/drm_device.h>
#include <drm/drm_plane.h>
#define MAX_CRTC 3
#define MAX_PLANE 5
#define MAX_FB_BUFFER 4
#define DEFAULT_WIN 0
struct drm_crtc_state;
struct drm_display_mode;
#define to_exynos_crtc(x) container_of(x, struct exynos_drm_crtc, base)
#define to_exynos_plane(x) container_of(x, struct exynos_drm_plane, base)
/* this enumerates display type. */
enum exynos_drm_output_type {
/* RGB or CPU Interface. */
/* HDMI Interface. */
/* Virtual Display Interface. */
struct exynos_drm_rect {
unsigned int x, y;
unsigned int w, h;
* Exynos drm plane state structure.
* @base: plane_state object (contains drm_framebuffer pointer)
* @src: rectangle of the source image data to be displayed (clipped to
* visible part).
* @crtc: rectangle of the target image position on hardware screen
* (clipped to visible part).
* @h_ratio: horizontal scaling ratio, 16.16 fixed point
* @v_ratio: vertical scaling ratio, 16.16 fixed point
* this structure consists plane state data that will be applied to hardware
* specific overlay info.
struct exynos_drm_plane_state {
struct drm_plane_state base;
struct exynos_drm_rect crtc;
struct exynos_drm_rect src;
unsigned int h_ratio;
unsigned int v_ratio;
static inline struct exynos_drm_plane_state *
to_exynos_plane_state(struct drm_plane_state *state)
return container_of(state, struct exynos_drm_plane_state, base);
* Exynos drm common overlay structure.
* @base: plane object
* @index: hardware index of the overlay layer
* this structure is common to exynos SoC and its contents would be copied
* to hardware specific overlay info.
struct exynos_drm_plane {
struct drm_plane base;
const struct exynos_drm_plane_config *config;
unsigned int index;
#define EXYNOS_DRM_PLANE_CAP_ZPOS (1 << 2)
#define EXYNOS_DRM_PLANE_CAP_TILE (1 << 3)
* Exynos DRM plane configuration structure.
* @zpos: initial z-position of the plane.
* @type: type of the plane (primary, cursor or overlay).
* @pixel_formats: supported pixel formats.
* @num_pixel_formats: number of elements in 'pixel_formats'.
* @capabilities: supported features (see EXYNOS_DRM_PLANE_CAP_*)
struct exynos_drm_plane_config {
unsigned int zpos;
enum drm_plane_type type;
const uint32_t *pixel_formats;
unsigned int num_pixel_formats;
unsigned int capabilities;
* Exynos drm crtc ops
* @atomic_enable: enable the device
* @atomic_disable: disable the device
* @enable_vblank: specific driver callback for enabling vblank interrupt.
* @disable_vblank: specific driver callback for disabling vblank interrupt.
* @mode_valid: specific driver callback for mode validation
* @atomic_check: validate state
* @atomic_begin: prepare device to receive an update
* @atomic_flush: mark the end of device update
* @update_plane: apply hardware specific overlay data to registers.
* @disable_plane: disable hardware specific overlay.
* @te_handler: trigger to transfer video image at the tearing effect
* synchronization signal if there is a page flip request.
struct exynos_drm_crtc;
struct exynos_drm_crtc_ops {
void (*atomic_enable)(struct exynos_drm_crtc *crtc);
void (*atomic_disable)(struct exynos_drm_crtc *crtc);
int (*enable_vblank)(struct exynos_drm_crtc *crtc);
void (*disable_vblank)(struct exynos_drm_crtc *crtc);
enum drm_mode_status (*mode_valid)(struct exynos_drm_crtc *crtc,
const struct drm_display_mode *mode);
bool (*mode_fixup)(struct exynos_drm_crtc *crtc,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);
int (*atomic_check)(struct exynos_drm_crtc *crtc,
struct drm_crtc_state *state);
void (*atomic_begin)(struct exynos_drm_crtc *crtc);
void (*update_plane)(struct exynos_drm_crtc *crtc,
struct exynos_drm_plane *plane);
void (*disable_plane)(struct exynos_drm_crtc *crtc,
struct exynos_drm_plane *plane);
void (*atomic_flush)(struct exynos_drm_crtc *crtc);
void (*te_handler)(struct exynos_drm_crtc *crtc);
struct exynos_drm_clk {
void (*enable)(struct exynos_drm_clk *clk, bool enable);
* Exynos specific crtc structure.
* @base: crtc object.
* @type: one of EXYNOS_DISPLAY_TYPE_LCD and HDMI.
* @ops: pointer to callbacks for exynos drm specific functionality
* @ctx: A pointer to the crtc's implementation specific context
* @pipe_clk: A pointer to the crtc's pipeline clock.
struct exynos_drm_crtc {
struct drm_crtc base;
enum exynos_drm_output_type type;
const struct exynos_drm_crtc_ops *ops;
void *ctx;
struct exynos_drm_clk *pipe_clk;
bool i80_mode : 1;
static inline void exynos_drm_pipe_clk_enable(struct exynos_drm_crtc *crtc,
bool enable)
if (crtc->pipe_clk)
crtc->pipe_clk->enable(crtc->pipe_clk, enable);
struct drm_exynos_file_private {
/* for g2d api */
struct list_head inuse_cmdlist;
struct list_head event_list;
struct list_head userptr_list;
* Exynos drm private structure.
* @pending: the crtcs that have pending updates to finish
* @lock: protect access to @pending
* @wait: wait an atomic commit to finish
struct exynos_drm_private {
struct drm_fb_helper *fb_helper;
struct device *g2d_dev;
struct device *dma_dev;
void *mapping;
/* for atomic commit */
u32 pending;
spinlock_t lock;
wait_queue_head_t wait;
static inline struct device *to_dma_dev(struct drm_device *dev)
struct exynos_drm_private *priv = dev->dev_private;
return priv->dma_dev;
static inline bool is_drm_iommu_supported(struct drm_device *drm_dev)
struct exynos_drm_private *priv = drm_dev->dev_private;
return priv->mapping ? true : false;
int exynos_drm_register_dma(struct drm_device *drm, struct device *dev,
void **dma_priv);
void exynos_drm_unregister_dma(struct drm_device *drm, struct device *dev,
void **dma_priv);
void exynos_drm_cleanup_dma(struct drm_device *drm);
struct drm_encoder *exynos_dpi_probe(struct device *dev);
int exynos_dpi_remove(struct drm_encoder *encoder);
int exynos_dpi_bind(struct drm_device *dev, struct drm_encoder *encoder);
static inline struct drm_encoder *
exynos_dpi_probe(struct device *dev) { return NULL; }
static inline int exynos_dpi_remove(struct drm_encoder *encoder)
return 0;
static inline int exynos_dpi_bind(struct drm_device *dev,
struct drm_encoder *encoder)
return 0;
int exynos_drm_check_fimc_device(struct device *dev);
static inline int exynos_drm_check_fimc_device(struct device *dev)
return 0;
int exynos_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state,
bool nonblock);
extern struct platform_driver fimd_driver;
extern struct platform_driver exynos5433_decon_driver;
extern struct platform_driver decon_driver;
extern struct platform_driver dp_driver;
extern struct platform_driver dsi_driver;
extern struct platform_driver mixer_driver;
extern struct platform_driver hdmi_driver;
extern struct platform_driver vidi_driver;
extern struct platform_driver g2d_driver;
extern struct platform_driver fimc_driver;
extern struct platform_driver rotator_driver;
extern struct platform_driver scaler_driver;
extern struct platform_driver gsc_driver;
extern struct platform_driver mic_driver;