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1/*
2 * Copyright (C) 2012 Texas Instruments
3 * Author: Rob Clark <robdclark@gmail.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#ifndef __TILCDC_DRV_H__
19#define __TILCDC_DRV_H__
20
21#include <linux/clk.h>
22#include <linux/cpufreq.h>
23#include <linux/module.h>
24#include <linux/platform_device.h>
25#include <linux/pm.h>
26#include <linux/pm_runtime.h>
27#include <linux/slab.h>
28#include <linux/of.h>
29#include <linux/of_device.h>
30#include <linux/list.h>
31
32#include <drm/drmP.h>
33#include <drm/drm_crtc_helper.h>
34#include <drm/drm_gem_cma_helper.h>
35#include <drm/drm_fb_cma_helper.h>
36
37/* Defaulting to pixel clock defined on AM335x */
38#define TILCDC_DEFAULT_MAX_PIXELCLOCK 126000
39/* Defaulting to max width as defined on AM335x */
40#define TILCDC_DEFAULT_MAX_WIDTH 2048
41/*
42 * This may need some tweaking, but want to allow at least 1280x1024@60
43 * with optimized DDR & EMIF settings tweaked 1920x1080@24 appears to
44 * be supportable
45 */
46#define TILCDC_DEFAULT_MAX_BANDWIDTH (1280*1024*60)
47
48
49struct tilcdc_drm_private {
50 void __iomem *mmio;
51
52 struct clk *clk; /* functional clock */
53 int rev; /* IP revision */
54
55 /* don't attempt resolutions w/ higher W * H * Hz: */
56 uint32_t max_bandwidth;
57 /*
58 * Pixel Clock will be restricted to some value as
59 * defined in the device datasheet measured in KHz
60 */
61 uint32_t max_pixelclock;
62 /*
63 * Max allowable width is limited on a per device basis
64 * measured in pixels
65 */
66 uint32_t max_width;
67
68 /* register contents saved across suspend/resume: */
69 u32 *saved_register;
70 bool ctx_valid;
71
72#ifdef CONFIG_CPU_FREQ
73 struct notifier_block freq_transition;
74 unsigned int lcd_fck_rate;
75#endif
76
77 struct workqueue_struct *wq;
78
79 struct drm_fbdev_cma *fbdev;
80
81 struct drm_crtc *crtc;
82
83 unsigned int num_encoders;
84 struct drm_encoder *encoders[8];
85
86 unsigned int num_connectors;
87 struct drm_connector *connectors[8];
88 const struct drm_connector_helper_funcs *connector_funcs[8];
89
90 bool is_componentized;
91};
92
93/* Sub-module for display. Since we don't know at compile time what panels
94 * or display adapter(s) might be present (for ex, off chip dvi/tfp410,
95 * hdmi encoder, various lcd panels), the connector/encoder(s) are split into
96 * separate drivers. If they are probed and found to be present, they
97 * register themselves with tilcdc_register_module().
98 */
99struct tilcdc_module;
100
101struct tilcdc_module_ops {
102 /* create appropriate encoders/connectors: */
103 int (*modeset_init)(struct tilcdc_module *mod, struct drm_device *dev);
104#ifdef CONFIG_DEBUG_FS
105 /* create debugfs nodes (can be NULL): */
106 int (*debugfs_init)(struct tilcdc_module *mod, struct drm_minor *minor);
107 /* cleanup debugfs nodes (can be NULL): */
108 void (*debugfs_cleanup)(struct tilcdc_module *mod, struct drm_minor *minor);
109#endif
110};
111
112struct tilcdc_module {
113 const char *name;
114 struct list_head list;
115 const struct tilcdc_module_ops *funcs;
116 unsigned int preferred_bpp;
117};
118
119void tilcdc_module_init(struct tilcdc_module *mod, const char *name,
120 const struct tilcdc_module_ops *funcs);
121void tilcdc_module_cleanup(struct tilcdc_module *mod);
122
123/* Panel config that needs to be set in the crtc, but is not coming from
124 * the mode timings. The display module is expected to call
125 * tilcdc_crtc_set_panel_info() to set this during modeset.
126 */
127struct tilcdc_panel_info {
128
129 /* AC Bias Pin Frequency */
130 uint32_t ac_bias;
131
132 /* AC Bias Pin Transitions per Interrupt */
133 uint32_t ac_bias_intrpt;
134
135 /* DMA burst size */
136 uint32_t dma_burst_sz;
137
138 /* Bits per pixel */
139 uint32_t bpp;
140
141 /* FIFO DMA Request Delay */
142 uint32_t fdd;
143
144 /* TFT Alternative Signal Mapping (Only for active) */
145 bool tft_alt_mode;
146
147 /* Invert pixel clock */
148 bool invert_pxl_clk;
149
150 /* Horizontal and Vertical Sync Edge: 0=rising 1=falling */
151 uint32_t sync_edge;
152
153 /* Horizontal and Vertical Sync: Control: 0=ignore */
154 uint32_t sync_ctrl;
155
156 /* Raster Data Order Select: 1=Most-to-least 0=Least-to-most */
157 uint32_t raster_order;
158
159 /* DMA FIFO threshold */
160 uint32_t fifo_th;
161};
162
163#define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
164
165struct drm_crtc *tilcdc_crtc_create(struct drm_device *dev);
166irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc);
167void tilcdc_crtc_update_clk(struct drm_crtc *crtc);
168void tilcdc_crtc_set_panel_info(struct drm_crtc *crtc,
169 const struct tilcdc_panel_info *info);
170void tilcdc_crtc_set_simulate_vesa_sync(struct drm_crtc *crtc,
171 bool simulate_vesa_sync);
172int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode);
173int tilcdc_crtc_max_width(struct drm_crtc *crtc);
174void tilcdc_crtc_dpms(struct drm_crtc *crtc, int mode);
175
176#endif /* __TILCDC_DRV_H__ */
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2012 Texas Instruments
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7#ifndef __TILCDC_DRV_H__
8#define __TILCDC_DRV_H__
9
10#include <linux/cpufreq.h>
11#include <linux/irqreturn.h>
12
13#include <drm/drm_print.h>
14
15struct clk;
16struct workqueue_struct;
17
18struct drm_connector;
19struct drm_connector_helper_funcs;
20struct drm_crtc;
21struct drm_device;
22struct drm_display_mode;
23struct drm_encoder;
24struct drm_framebuffer;
25struct drm_minor;
26struct drm_pending_vblank_event;
27struct drm_plane;
28
29/* Defaulting to pixel clock defined on AM335x */
30#define TILCDC_DEFAULT_MAX_PIXELCLOCK 126000
31/* Maximum display width for LCDC V1 */
32#define TILCDC_DEFAULT_MAX_WIDTH_V1 1024
33/* ... and for LCDC V2 found on AM335x: */
34#define TILCDC_DEFAULT_MAX_WIDTH_V2 2048
35/*
36 * This may need some tweaking, but want to allow at least 1280x1024@60
37 * with optimized DDR & EMIF settings tweaked 1920x1080@24 appears to
38 * be supportable
39 */
40#define TILCDC_DEFAULT_MAX_BANDWIDTH (1280*1024*60)
41
42
43struct tilcdc_drm_private {
44 void __iomem *mmio;
45
46 struct clk *clk; /* functional clock */
47 int rev; /* IP revision */
48
49 unsigned int irq;
50
51 /* don't attempt resolutions w/ higher W * H * Hz: */
52 uint32_t max_bandwidth;
53 /*
54 * Pixel Clock will be restricted to some value as
55 * defined in the device datasheet measured in KHz
56 */
57 uint32_t max_pixelclock;
58 /*
59 * Max allowable width is limited on a per device basis
60 * measured in pixels
61 */
62 uint32_t max_width;
63
64 /* Supported pixel formats */
65 const uint32_t *pixelformats;
66 uint32_t num_pixelformats;
67
68#ifdef CONFIG_CPU_FREQ
69 struct notifier_block freq_transition;
70#endif
71
72 struct workqueue_struct *wq;
73
74 struct drm_crtc *crtc;
75
76 unsigned int num_encoders;
77 struct drm_encoder *encoders[8];
78
79 unsigned int num_connectors;
80 struct drm_connector *connectors[8];
81
82 struct drm_encoder *external_encoder;
83 struct drm_connector *external_connector;
84
85 bool is_registered;
86 bool is_componentized;
87 bool irq_enabled;
88};
89
90/* Sub-module for display. Since we don't know at compile time what panels
91 * or display adapter(s) might be present (for ex, off chip dvi/tfp410,
92 * hdmi encoder, various lcd panels), the connector/encoder(s) are split into
93 * separate drivers. If they are probed and found to be present, they
94 * register themselves with tilcdc_register_module().
95 */
96struct tilcdc_module;
97
98struct tilcdc_module_ops {
99 /* create appropriate encoders/connectors: */
100 int (*modeset_init)(struct tilcdc_module *mod, struct drm_device *dev);
101#ifdef CONFIG_DEBUG_FS
102 /* create debugfs nodes (can be NULL): */
103 int (*debugfs_init)(struct tilcdc_module *mod, struct drm_minor *minor);
104#endif
105};
106
107struct tilcdc_module {
108 const char *name;
109 struct list_head list;
110 const struct tilcdc_module_ops *funcs;
111};
112
113void tilcdc_module_init(struct tilcdc_module *mod, const char *name,
114 const struct tilcdc_module_ops *funcs);
115void tilcdc_module_cleanup(struct tilcdc_module *mod);
116
117/* Panel config that needs to be set in the crtc, but is not coming from
118 * the mode timings. The display module is expected to call
119 * tilcdc_crtc_set_panel_info() to set this during modeset.
120 */
121struct tilcdc_panel_info {
122
123 /* AC Bias Pin Frequency */
124 uint32_t ac_bias;
125
126 /* AC Bias Pin Transitions per Interrupt */
127 uint32_t ac_bias_intrpt;
128
129 /* DMA burst size */
130 uint32_t dma_burst_sz;
131
132 /* Bits per pixel */
133 uint32_t bpp;
134
135 /* FIFO DMA Request Delay */
136 uint32_t fdd;
137
138 /* TFT Alternative Signal Mapping (Only for active) */
139 bool tft_alt_mode;
140
141 /* Invert pixel clock */
142 bool invert_pxl_clk;
143
144 /* Horizontal and Vertical Sync Edge: 0=rising 1=falling */
145 uint32_t sync_edge;
146
147 /* Horizontal and Vertical Sync: Control: 0=ignore */
148 uint32_t sync_ctrl;
149
150 /* Raster Data Order Select: 1=Most-to-least 0=Least-to-most */
151 uint32_t raster_order;
152
153 /* DMA FIFO threshold */
154 uint32_t fifo_th;
155};
156
157#define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
158
159int tilcdc_crtc_create(struct drm_device *dev);
160irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc);
161void tilcdc_crtc_update_clk(struct drm_crtc *crtc);
162void tilcdc_crtc_set_panel_info(struct drm_crtc *crtc,
163 const struct tilcdc_panel_info *info);
164void tilcdc_crtc_set_simulate_vesa_sync(struct drm_crtc *crtc,
165 bool simulate_vesa_sync);
166void tilcdc_crtc_shutdown(struct drm_crtc *crtc);
167int tilcdc_crtc_update_fb(struct drm_crtc *crtc,
168 struct drm_framebuffer *fb,
169 struct drm_pending_vblank_event *event);
170
171int tilcdc_plane_init(struct drm_device *dev, struct drm_plane *plane);
172
173#endif /* __TILCDC_DRV_H__ */