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/* SPDX-License-Identifier: GPL-2.0-only */
* Copyright (C) 2012 Texas Instruments
* Author: Rob Clark <>
#ifndef __TILCDC_DRV_H__
#define __TILCDC_DRV_H__
#include <linux/cpufreq.h>
#include <linux/irqreturn.h>
#include <drm/drm_print.h>
struct clk;
struct workqueue_struct;
struct drm_connector;
struct drm_connector_helper_funcs;
struct drm_crtc;
struct drm_device;
struct drm_display_mode;
struct drm_encoder;
struct drm_framebuffer;
struct drm_minor;
struct drm_pending_vblank_event;
struct drm_plane;
/* Defaulting to pixel clock defined on AM335x */
/* Maximum display width for LCDC V1 */
/* ... and for LCDC V2 found on AM335x: */
* This may need some tweaking, but want to allow at least 1280x1024@60
* with optimized DDR & EMIF settings tweaked 1920x1080@24 appears to
* be supportable
#define TILCDC_DEFAULT_MAX_BANDWIDTH (1280*1024*60)
struct tilcdc_drm_private {
void __iomem *mmio;
struct clk *clk; /* functional clock */
int rev; /* IP revision */
unsigned int irq;
/* don't attempt resolutions w/ higher W * H * Hz: */
uint32_t max_bandwidth;
* Pixel Clock will be restricted to some value as
* defined in the device datasheet measured in KHz
uint32_t max_pixelclock;
* Max allowable width is limited on a per device basis
* measured in pixels
uint32_t max_width;
/* Supported pixel formats */
const uint32_t *pixelformats;
uint32_t num_pixelformats;
struct notifier_block freq_transition;
struct workqueue_struct *wq;
struct drm_crtc *crtc;
unsigned int num_encoders;
struct drm_encoder *encoders[8];
unsigned int num_connectors;
struct drm_connector *connectors[8];
struct drm_encoder *external_encoder;
struct drm_connector *external_connector;
bool is_registered;
bool is_componentized;
bool irq_enabled;
/* Sub-module for display. Since we don't know at compile time what panels
* or display adapter(s) might be present (for ex, off chip dvi/tfp410,
* hdmi encoder, various lcd panels), the connector/encoder(s) are split into
* separate drivers. If they are probed and found to be present, they
* register themselves with tilcdc_register_module().
struct tilcdc_module;
struct tilcdc_module_ops {
/* create appropriate encoders/connectors: */
int (*modeset_init)(struct tilcdc_module *mod, struct drm_device *dev);
/* create debugfs nodes (can be NULL): */
int (*debugfs_init)(struct tilcdc_module *mod, struct drm_minor *minor);
struct tilcdc_module {
const char *name;
struct list_head list;
const struct tilcdc_module_ops *funcs;
void tilcdc_module_init(struct tilcdc_module *mod, const char *name,
const struct tilcdc_module_ops *funcs);
void tilcdc_module_cleanup(struct tilcdc_module *mod);
/* Panel config that needs to be set in the crtc, but is not coming from
* the mode timings. The display module is expected to call
* tilcdc_crtc_set_panel_info() to set this during modeset.
struct tilcdc_panel_info {
/* AC Bias Pin Frequency */
uint32_t ac_bias;
/* AC Bias Pin Transitions per Interrupt */
uint32_t ac_bias_intrpt;
/* DMA burst size */
uint32_t dma_burst_sz;
/* Bits per pixel */
uint32_t bpp;
/* FIFO DMA Request Delay */
uint32_t fdd;
/* TFT Alternative Signal Mapping (Only for active) */
bool tft_alt_mode;
/* Invert pixel clock */
bool invert_pxl_clk;
/* Horizontal and Vertical Sync Edge: 0=rising 1=falling */
uint32_t sync_edge;
/* Horizontal and Vertical Sync: Control: 0=ignore */
uint32_t sync_ctrl;
/* Raster Data Order Select: 1=Most-to-least 0=Least-to-most */
uint32_t raster_order;
/* DMA FIFO threshold */
uint32_t fifo_th;
#define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
int tilcdc_crtc_create(struct drm_device *dev);
irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc);
void tilcdc_crtc_update_clk(struct drm_crtc *crtc);
void tilcdc_crtc_set_panel_info(struct drm_crtc *crtc,
const struct tilcdc_panel_info *info);
void tilcdc_crtc_set_simulate_vesa_sync(struct drm_crtc *crtc,
bool simulate_vesa_sync);
void tilcdc_crtc_shutdown(struct drm_crtc *crtc);
int tilcdc_crtc_update_fb(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event);
int tilcdc_plane_init(struct drm_device *dev, struct drm_plane *plane);
#endif /* __TILCDC_DRV_H__ */