1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2012 Texas Instruments
4 * Author: Rob Clark <robdclark@gmail.com>
7 #ifndef __TILCDC_DRV_H__
8 #define __TILCDC_DRV_H__
10 #include <linux/clk.h>
11 #include <linux/cpufreq.h>
12 #include <linux/module.h>
13 #include <linux/platform_device.h>
15 #include <linux/pm_runtime.h>
16 #include <linux/slab.h>
18 #include <linux/of_device.h>
19 #include <linux/list.h>
22 #include <drm/drm_bridge.h>
23 #include <drm/drm_fb_cma_helper.h>
24 #include <drm/drm_gem_cma_helper.h>
26 /* Defaulting to pixel clock defined on AM335x */
27 #define TILCDC_DEFAULT_MAX_PIXELCLOCK 126000
28 /* Defaulting to max width as defined on AM335x */
29 #define TILCDC_DEFAULT_MAX_WIDTH 2048
31 * This may need some tweaking, but want to allow at least 1280x1024@60
32 * with optimized DDR & EMIF settings tweaked 1920x1080@24 appears to
35 #define TILCDC_DEFAULT_MAX_BANDWIDTH (1280*1024*60)
38 struct tilcdc_drm_private {
41 struct clk *clk; /* functional clock */
42 int rev; /* IP revision */
44 /* don't attempt resolutions w/ higher W * H * Hz: */
45 uint32_t max_bandwidth;
47 * Pixel Clock will be restricted to some value as
48 * defined in the device datasheet measured in KHz
50 uint32_t max_pixelclock;
52 * Max allowable width is limited on a per device basis
57 /* Supported pixel formats */
58 const uint32_t *pixelformats;
59 uint32_t num_pixelformats;
61 #ifdef CONFIG_CPU_FREQ
62 struct notifier_block freq_transition;
65 struct workqueue_struct *wq;
67 struct drm_crtc *crtc;
69 unsigned int num_encoders;
70 struct drm_encoder *encoders[8];
72 unsigned int num_connectors;
73 struct drm_connector *connectors[8];
75 struct drm_encoder *external_encoder;
76 struct drm_connector *external_connector;
77 const struct drm_connector_helper_funcs *connector_funcs;
80 bool is_componentized;
83 /* Sub-module for display. Since we don't know at compile time what panels
84 * or display adapter(s) might be present (for ex, off chip dvi/tfp410,
85 * hdmi encoder, various lcd panels), the connector/encoder(s) are split into
86 * separate drivers. If they are probed and found to be present, they
87 * register themselves with tilcdc_register_module().
91 struct tilcdc_module_ops {
92 /* create appropriate encoders/connectors: */
93 int (*modeset_init)(struct tilcdc_module *mod, struct drm_device *dev);
94 #ifdef CONFIG_DEBUG_FS
95 /* create debugfs nodes (can be NULL): */
96 int (*debugfs_init)(struct tilcdc_module *mod, struct drm_minor *minor);
100 struct tilcdc_module {
102 struct list_head list;
103 const struct tilcdc_module_ops *funcs;
106 void tilcdc_module_init(struct tilcdc_module *mod, const char *name,
107 const struct tilcdc_module_ops *funcs);
108 void tilcdc_module_cleanup(struct tilcdc_module *mod);
110 /* Panel config that needs to be set in the crtc, but is not coming from
111 * the mode timings. The display module is expected to call
112 * tilcdc_crtc_set_panel_info() to set this during modeset.
114 struct tilcdc_panel_info {
116 /* AC Bias Pin Frequency */
119 /* AC Bias Pin Transitions per Interrupt */
120 uint32_t ac_bias_intrpt;
123 uint32_t dma_burst_sz;
128 /* FIFO DMA Request Delay */
131 /* TFT Alternative Signal Mapping (Only for active) */
134 /* Invert pixel clock */
137 /* Horizontal and Vertical Sync Edge: 0=rising 1=falling */
140 /* Horizontal and Vertical Sync: Control: 0=ignore */
143 /* Raster Data Order Select: 1=Most-to-least 0=Least-to-most */
144 uint32_t raster_order;
146 /* DMA FIFO threshold */
150 #define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
152 int tilcdc_crtc_create(struct drm_device *dev);
153 irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc);
154 void tilcdc_crtc_update_clk(struct drm_crtc *crtc);
155 void tilcdc_crtc_set_panel_info(struct drm_crtc *crtc,
156 const struct tilcdc_panel_info *info);
157 void tilcdc_crtc_set_simulate_vesa_sync(struct drm_crtc *crtc,
158 bool simulate_vesa_sync);
159 int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode);
160 int tilcdc_crtc_max_width(struct drm_crtc *crtc);
161 void tilcdc_crtc_shutdown(struct drm_crtc *crtc);
162 int tilcdc_crtc_update_fb(struct drm_crtc *crtc,
163 struct drm_framebuffer *fb,
164 struct drm_pending_vblank_event *event);
166 int tilcdc_plane_init(struct drm_device *dev, struct drm_plane *plane);
168 #endif /* __TILCDC_DRV_H__ */