blob: c1de18bae41530df2eb1d8390b4876d60f29007a [file] [log] [blame]
* Copyright (C) 2012 Texas Instruments
* Author: Rob Clark <>
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <>.
#ifndef __TILCDC_DRV_H__
#define __TILCDC_DRV_H__
#include <linux/clk.h>
#include <linux/cpufreq.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/list.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>
/* Defaulting to pixel clock defined on AM335x */
/* Defaulting to max width as defined 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 */
/* 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;
/* register contents saved across suspend/resume: */
u32 *saved_register;
bool ctx_valid;
struct notifier_block freq_transition;
unsigned int lcd_fck_rate;
struct workqueue_struct *wq;
struct drm_fbdev_cma *fbdev;
struct drm_crtc *crtc;
unsigned int num_encoders;
struct drm_encoder *encoders[8];
unsigned int num_connectors;
struct drm_connector *connectors[8];
const struct drm_connector_helper_funcs *connector_funcs[8];
bool is_componentized;
/* 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);
/* cleanup debugfs nodes (can be NULL): */
void (*debugfs_cleanup)(struct tilcdc_module *mod, struct drm_minor *minor);
struct tilcdc_module {
const char *name;
struct list_head list;
const struct tilcdc_module_ops *funcs;
unsigned int preferred_bpp;
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__)
struct drm_crtc *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);
int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode);
int tilcdc_crtc_max_width(struct drm_crtc *crtc);
void tilcdc_crtc_dpms(struct drm_crtc *crtc, int mode);
#endif /* __TILCDC_DRV_H__ */