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[linux.git] / drivers / gpu / drm / omapdrm / dss / dss.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2009 Nokia Corporation
4  * Author: Tomi Valkeinen <[email protected]>
5  *
6  * Some code and ideas taken from drivers/video/omap/ driver
7  * by Imre Deak.
8  */
9
10 #ifndef __OMAP2_DSS_H
11 #define __OMAP2_DSS_H
12
13 #include <linux/interrupt.h>
14
15 #include "omapdss.h"
16
17 struct dispc_device;
18 struct dss_debugfs_entry;
19 struct platform_device;
20 struct seq_file;
21
22 #define MAX_DSS_LCD_MANAGERS    3
23 #define MAX_NUM_DSI             2
24
25 #ifdef pr_fmt
26 #undef pr_fmt
27 #endif
28
29 #ifdef DSS_SUBSYS_NAME
30 #define pr_fmt(fmt) DSS_SUBSYS_NAME ": " fmt
31 #else
32 #define pr_fmt(fmt) fmt
33 #endif
34
35 #define DSSDBG(format, ...) \
36         pr_debug(format, ## __VA_ARGS__)
37
38 #ifdef DSS_SUBSYS_NAME
39 #define DSSERR(format, ...) \
40         pr_err("omapdss " DSS_SUBSYS_NAME " error: " format, ##__VA_ARGS__)
41 #else
42 #define DSSERR(format, ...) \
43         pr_err("omapdss error: " format, ##__VA_ARGS__)
44 #endif
45
46 #ifdef DSS_SUBSYS_NAME
47 #define DSSINFO(format, ...) \
48         pr_info("omapdss " DSS_SUBSYS_NAME ": " format, ##__VA_ARGS__)
49 #else
50 #define DSSINFO(format, ...) \
51         pr_info("omapdss: " format, ## __VA_ARGS__)
52 #endif
53
54 #ifdef DSS_SUBSYS_NAME
55 #define DSSWARN(format, ...) \
56         pr_warn("omapdss " DSS_SUBSYS_NAME ": " format, ##__VA_ARGS__)
57 #else
58 #define DSSWARN(format, ...) \
59         pr_warn("omapdss: " format, ##__VA_ARGS__)
60 #endif
61
62 /* OMAP TRM gives bitfields as start:end, where start is the higher bit
63    number. For example 7:0 */
64 #define FLD_MASK(start, end)    (((1 << ((start) - (end) + 1)) - 1) << (end))
65 #define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
66 #define FLD_GET(val, start, end) (((val) & FLD_MASK(start, end)) >> (end))
67 #define FLD_MOD(orig, val, start, end) \
68         (((orig) & ~FLD_MASK(start, end)) | FLD_VAL(val, start, end))
69
70 enum dss_model {
71         DSS_MODEL_OMAP2,
72         DSS_MODEL_OMAP3,
73         DSS_MODEL_OMAP4,
74         DSS_MODEL_OMAP5,
75         DSS_MODEL_DRA7,
76 };
77
78 enum dss_io_pad_mode {
79         DSS_IO_PAD_MODE_RESET,
80         DSS_IO_PAD_MODE_RFBI,
81         DSS_IO_PAD_MODE_BYPASS,
82 };
83
84 enum dss_hdmi_venc_clk_source_select {
85         DSS_VENC_TV_CLK = 0,
86         DSS_HDMI_M_PCLK = 1,
87 };
88
89 enum dss_dsi_content_type {
90         DSS_DSI_CONTENT_DCS,
91         DSS_DSI_CONTENT_GENERIC,
92 };
93
94 enum dss_clk_source {
95         DSS_CLK_SRC_FCK = 0,
96
97         DSS_CLK_SRC_PLL1_1,
98         DSS_CLK_SRC_PLL1_2,
99         DSS_CLK_SRC_PLL1_3,
100
101         DSS_CLK_SRC_PLL2_1,
102         DSS_CLK_SRC_PLL2_2,
103         DSS_CLK_SRC_PLL2_3,
104
105         DSS_CLK_SRC_HDMI_PLL,
106 };
107
108 enum dss_pll_id {
109         DSS_PLL_DSI1,
110         DSS_PLL_DSI2,
111         DSS_PLL_HDMI,
112         DSS_PLL_VIDEO1,
113         DSS_PLL_VIDEO2,
114 };
115
116 struct dss_pll;
117
118 #define DSS_PLL_MAX_HSDIVS 4
119
120 enum dss_pll_type {
121         DSS_PLL_TYPE_A,
122         DSS_PLL_TYPE_B,
123 };
124
125 /*
126  * Type-A PLLs: clkout[]/mX[] refer to hsdiv outputs m4, m5, m6, m7.
127  * Type-B PLLs: clkout[0] refers to m2.
128  */
129 struct dss_pll_clock_info {
130         /* rates that we get with dividers below */
131         unsigned long fint;
132         unsigned long clkdco;
133         unsigned long clkout[DSS_PLL_MAX_HSDIVS];
134
135         /* dividers */
136         u16 n;
137         u16 m;
138         u32 mf;
139         u16 mX[DSS_PLL_MAX_HSDIVS];
140         u16 sd;
141 };
142
143 struct dss_pll_ops {
144         int (*enable)(struct dss_pll *pll);
145         void (*disable)(struct dss_pll *pll);
146         int (*set_config)(struct dss_pll *pll,
147                 const struct dss_pll_clock_info *cinfo);
148 };
149
150 struct dss_pll_hw {
151         enum dss_pll_type type;
152
153         unsigned int n_max;
154         unsigned int m_min;
155         unsigned int m_max;
156         unsigned int mX_max;
157
158         unsigned long fint_min, fint_max;
159         unsigned long clkdco_min, clkdco_low, clkdco_max;
160
161         u8 n_msb, n_lsb;
162         u8 m_msb, m_lsb;
163         u8 mX_msb[DSS_PLL_MAX_HSDIVS], mX_lsb[DSS_PLL_MAX_HSDIVS];
164
165         bool has_stopmode;
166         bool has_freqsel;
167         bool has_selfreqdco;
168         bool has_refsel;
169
170         /* DRA7 errata i886: use high N & M to avoid jitter */
171         bool errata_i886;
172
173         /* DRA7 errata i932: retry pll lock on failure */
174         bool errata_i932;
175 };
176
177 struct dss_pll {
178         const char *name;
179         enum dss_pll_id id;
180         struct dss_device *dss;
181
182         struct clk *clkin;
183         struct regulator *regulator;
184
185         void __iomem *base;
186
187         const struct dss_pll_hw *hw;
188
189         const struct dss_pll_ops *ops;
190
191         struct dss_pll_clock_info cinfo;
192 };
193
194 /* Defines a generic omap register field */
195 struct dss_reg_field {
196         u8 start, end;
197 };
198
199 struct dispc_clock_info {
200         /* rates that we get with dividers below */
201         unsigned long lck;
202         unsigned long pck;
203
204         /* dividers */
205         u16 lck_div;
206         u16 pck_div;
207 };
208
209 struct dss_lcd_mgr_config {
210         enum dss_io_pad_mode io_pad_mode;
211
212         bool stallmode;
213         bool fifohandcheck;
214
215         struct dispc_clock_info clock_info;
216
217         int video_port_width;
218
219         int lcden_sig_polarity;
220 };
221
222 #define DSS_SZ_REGS                     SZ_512
223
224 struct dss_device {
225         struct platform_device *pdev;
226         void __iomem    *base;
227         struct regmap   *syscon_pll_ctrl;
228         u32             syscon_pll_ctrl_offset;
229
230         struct platform_device *drm_pdev;
231
232         struct clk      *parent_clk;
233         struct clk      *dss_clk;
234         unsigned long   dss_clk_rate;
235
236         unsigned long   cache_req_pck;
237         unsigned long   cache_prate;
238         struct dispc_clock_info cache_dispc_cinfo;
239
240         enum dss_clk_source dsi_clk_source[MAX_NUM_DSI];
241         enum dss_clk_source dispc_clk_source;
242         enum dss_clk_source lcd_clk_source[MAX_DSS_LCD_MANAGERS];
243
244         bool            ctx_valid;
245         u32             ctx[DSS_SZ_REGS / sizeof(u32)];
246
247         const struct dss_features *feat;
248
249         struct {
250                 struct dentry *root;
251                 struct dss_debugfs_entry *clk;
252                 struct dss_debugfs_entry *dss;
253         } debugfs;
254
255         struct dss_pll *plls[4];
256         struct dss_pll  *video1_pll;
257         struct dss_pll  *video2_pll;
258
259         struct dispc_device *dispc;
260         struct omap_drm_private *mgr_ops_priv;
261 };
262
263 /* core */
264 static inline int dss_set_min_bus_tput(struct device *dev, unsigned long tput)
265 {
266         /* To be implemented when the OMAP platform will provide this feature */
267         return 0;
268 }
269
270 static inline bool dss_mgr_is_lcd(enum omap_channel id)
271 {
272         if (id == OMAP_DSS_CHANNEL_LCD || id == OMAP_DSS_CHANNEL_LCD2 ||
273                         id == OMAP_DSS_CHANNEL_LCD3)
274                 return true;
275         else
276                 return false;
277 }
278
279 /* DSS */
280 #if defined(CONFIG_OMAP2_DSS_DEBUGFS)
281 struct dss_debugfs_entry *
282 dss_debugfs_create_file(struct dss_device *dss, const char *name,
283                         int (*show_fn)(struct seq_file *s, void *data),
284                         void *data);
285 void dss_debugfs_remove_file(struct dss_debugfs_entry *entry);
286 #else
287 static inline struct dss_debugfs_entry *
288 dss_debugfs_create_file(struct dss_device *dss, const char *name,
289                         int (*show_fn)(struct seq_file *s, void *data),
290                         void *data)
291 {
292         return NULL;
293 }
294
295 static inline void dss_debugfs_remove_file(struct dss_debugfs_entry *entry)
296 {
297 }
298 #endif /* CONFIG_OMAP2_DSS_DEBUGFS */
299
300 struct dss_device *dss_get_device(struct device *dev);
301
302 int dss_runtime_get(struct dss_device *dss);
303 void dss_runtime_put(struct dss_device *dss);
304
305 unsigned long dss_get_dispc_clk_rate(struct dss_device *dss);
306 unsigned long dss_get_max_fck_rate(struct dss_device *dss);
307 int dss_dpi_select_source(struct dss_device *dss, int port,
308                           enum omap_channel channel);
309 void dss_select_hdmi_venc_clk_source(struct dss_device *dss,
310                                      enum dss_hdmi_venc_clk_source_select src);
311 const char *dss_get_clk_source_name(enum dss_clk_source clk_src);
312
313 /* DSS VIDEO PLL */
314 struct dss_pll *dss_video_pll_init(struct dss_device *dss,
315                                    struct platform_device *pdev, int id,
316                                    struct regulator *regulator);
317 void dss_video_pll_uninit(struct dss_pll *pll);
318
319 void dss_ctrl_pll_enable(struct dss_pll *pll, bool enable);
320
321 void dss_sdi_init(struct dss_device *dss, int datapairs);
322 int dss_sdi_enable(struct dss_device *dss);
323 void dss_sdi_disable(struct dss_device *dss);
324
325 void dss_select_dsi_clk_source(struct dss_device *dss, int dsi_module,
326                                enum dss_clk_source clk_src);
327 void dss_select_lcd_clk_source(struct dss_device *dss,
328                                enum omap_channel channel,
329                                enum dss_clk_source clk_src);
330 enum dss_clk_source dss_get_dispc_clk_source(struct dss_device *dss);
331 enum dss_clk_source dss_get_dsi_clk_source(struct dss_device *dss,
332                                            int dsi_module);
333 enum dss_clk_source dss_get_lcd_clk_source(struct dss_device *dss,
334                                            enum omap_channel channel);
335
336 void dss_set_venc_output(struct dss_device *dss, enum omap_dss_venc_type type);
337 void dss_set_dac_pwrdn_bgz(struct dss_device *dss, bool enable);
338
339 int dss_set_fck_rate(struct dss_device *dss, unsigned long rate);
340
341 typedef bool (*dss_div_calc_func)(unsigned long fck, void *data);
342 bool dss_div_calc(struct dss_device *dss, unsigned long pck,
343                   unsigned long fck_min, dss_div_calc_func func, void *data);
344
345 /* SDI */
346 #ifdef CONFIG_OMAP2_DSS_SDI
347 int sdi_init_port(struct dss_device *dss, struct platform_device *pdev,
348                   struct device_node *port);
349 void sdi_uninit_port(struct device_node *port);
350 #else
351 static inline int sdi_init_port(struct dss_device *dss,
352                                 struct platform_device *pdev,
353                                 struct device_node *port)
354 {
355         return 0;
356 }
357 static inline void sdi_uninit_port(struct device_node *port)
358 {
359 }
360 #endif
361
362 /* DSI */
363
364 #ifdef CONFIG_OMAP2_DSS_DSI
365
366 void dsi_irq_handler(void);
367
368 #endif
369
370 /* DPI */
371 #ifdef CONFIG_OMAP2_DSS_DPI
372 int dpi_init_port(struct dss_device *dss, struct platform_device *pdev,
373                   struct device_node *port, enum dss_model dss_model);
374 void dpi_uninit_port(struct device_node *port);
375 #else
376 static inline int dpi_init_port(struct dss_device *dss,
377                                 struct platform_device *pdev,
378                                 struct device_node *port,
379                                 enum dss_model dss_model)
380 {
381         return 0;
382 }
383 static inline void dpi_uninit_port(struct device_node *port)
384 {
385 }
386 #endif
387
388 /* DISPC */
389 void dispc_dump_clocks(struct dispc_device *dispc, struct seq_file *s);
390
391 int dispc_runtime_get(struct dispc_device *dispc);
392 void dispc_runtime_put(struct dispc_device *dispc);
393
394 int dispc_get_num_ovls(struct dispc_device *dispc);
395 int dispc_get_num_mgrs(struct dispc_device *dispc);
396
397 const u32 *dispc_ovl_get_color_modes(struct dispc_device *dispc,
398                                             enum omap_plane_id plane);
399
400 void dispc_ovl_get_max_size(struct dispc_device *dispc, u16 *width, u16 *height);
401 bool dispc_ovl_color_mode_supported(struct dispc_device *dispc,
402                                     enum omap_plane_id plane, u32 fourcc);
403 enum omap_overlay_caps dispc_ovl_get_caps(struct dispc_device *dispc, enum omap_plane_id plane);
404
405 u32 dispc_read_irqstatus(struct dispc_device *dispc);
406 void dispc_clear_irqstatus(struct dispc_device *dispc, u32 mask);
407 void dispc_write_irqenable(struct dispc_device *dispc, u32 mask);
408
409 int dispc_request_irq(struct dispc_device *dispc, irq_handler_t handler,
410                              void *dev_id);
411 void dispc_free_irq(struct dispc_device *dispc, void *dev_id);
412
413 u32 dispc_mgr_get_vsync_irq(struct dispc_device *dispc,
414                                    enum omap_channel channel);
415 u32 dispc_mgr_get_framedone_irq(struct dispc_device *dispc,
416                                        enum omap_channel channel);
417 u32 dispc_mgr_get_sync_lost_irq(struct dispc_device *dispc,
418                                        enum omap_channel channel);
419
420 u32 dispc_get_memory_bandwidth_limit(struct dispc_device *dispc);
421
422 void dispc_mgr_enable(struct dispc_device *dispc,
423                              enum omap_channel channel, bool enable);
424
425 bool dispc_mgr_go_busy(struct dispc_device *dispc,
426                               enum omap_channel channel);
427
428 void dispc_mgr_go(struct dispc_device *dispc, enum omap_channel channel);
429
430 void dispc_mgr_set_lcd_config(struct dispc_device *dispc,
431                                      enum omap_channel channel,
432                                      const struct dss_lcd_mgr_config *config);
433 void dispc_mgr_set_timings(struct dispc_device *dispc,
434                                   enum omap_channel channel,
435                                   const struct videomode *vm);
436 void dispc_mgr_setup(struct dispc_device *dispc,
437                             enum omap_channel channel,
438                             const struct omap_overlay_manager_info *info);
439
440 int dispc_mgr_check_timings(struct dispc_device *dispc,
441                                    enum omap_channel channel,
442                                    const struct videomode *vm);
443
444 u32 dispc_mgr_gamma_size(struct dispc_device *dispc,
445                                 enum omap_channel channel);
446 void dispc_mgr_set_gamma(struct dispc_device *dispc,
447                                 enum omap_channel channel,
448                                 const struct drm_color_lut *lut,
449                                 unsigned int length);
450
451 int dispc_ovl_setup(struct dispc_device *dispc,
452                            enum omap_plane_id plane,
453                            const struct omap_overlay_info *oi,
454                            const struct videomode *vm, bool mem_to_mem,
455                            enum omap_channel channel);
456
457 int dispc_ovl_enable(struct dispc_device *dispc,
458                             enum omap_plane_id plane, bool enable);
459
460 void dispc_enable_sidle(struct dispc_device *dispc);
461 void dispc_disable_sidle(struct dispc_device *dispc);
462
463 void dispc_lcd_enable_signal(struct dispc_device *dispc, bool enable);
464 void dispc_pck_free_enable(struct dispc_device *dispc, bool enable);
465
466 typedef bool (*dispc_div_calc_func)(int lckd, int pckd, unsigned long lck,
467                 unsigned long pck, void *data);
468 bool dispc_div_calc(struct dispc_device *dispc, unsigned long dispc_freq,
469                     unsigned long pck_min, unsigned long pck_max,
470                     dispc_div_calc_func func, void *data);
471
472 int dispc_calc_clock_rates(struct dispc_device *dispc,
473                            unsigned long dispc_fclk_rate,
474                            struct dispc_clock_info *cinfo);
475
476
477 void dispc_ovl_set_fifo_threshold(struct dispc_device *dispc,
478                                   enum omap_plane_id plane, u32 low, u32 high);
479 void dispc_ovl_compute_fifo_thresholds(struct dispc_device *dispc,
480                                        enum omap_plane_id plane,
481                                        u32 *fifo_low, u32 *fifo_high,
482                                        bool use_fifomerge, bool manual_update);
483
484 void dispc_mgr_set_clock_div(struct dispc_device *dispc,
485                              enum omap_channel channel,
486                              const struct dispc_clock_info *cinfo);
487 void dispc_set_tv_pclk(struct dispc_device *dispc, unsigned long pclk);
488
489 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
490 static inline void dss_collect_irq_stats(u32 irqstatus, unsigned int *irq_arr)
491 {
492         int b;
493         for (b = 0; b < 32; ++b) {
494                 if (irqstatus & (1 << b))
495                         irq_arr[b]++;
496         }
497 }
498 #endif
499
500 /* PLL */
501 typedef bool (*dss_pll_calc_func)(int n, int m, unsigned long fint,
502                 unsigned long clkdco, void *data);
503 typedef bool (*dss_hsdiv_calc_func)(int m_dispc, unsigned long dispc,
504                 void *data);
505
506 int dss_pll_register(struct dss_device *dss, struct dss_pll *pll);
507 void dss_pll_unregister(struct dss_pll *pll);
508 struct dss_pll *dss_pll_find(struct dss_device *dss, const char *name);
509 struct dss_pll *dss_pll_find_by_src(struct dss_device *dss,
510                                     enum dss_clk_source src);
511 unsigned int dss_pll_get_clkout_idx_for_src(enum dss_clk_source src);
512 int dss_pll_enable(struct dss_pll *pll);
513 void dss_pll_disable(struct dss_pll *pll);
514 int dss_pll_set_config(struct dss_pll *pll,
515                 const struct dss_pll_clock_info *cinfo);
516
517 bool dss_pll_hsdiv_calc_a(const struct dss_pll *pll, unsigned long clkdco,
518                 unsigned long out_min, unsigned long out_max,
519                 dss_hsdiv_calc_func func, void *data);
520 bool dss_pll_calc_a(const struct dss_pll *pll, unsigned long clkin,
521                 unsigned long pll_min, unsigned long pll_max,
522                 dss_pll_calc_func func, void *data);
523
524 bool dss_pll_calc_b(const struct dss_pll *pll, unsigned long clkin,
525         unsigned long target_clkout, struct dss_pll_clock_info *cinfo);
526
527 int dss_pll_write_config_type_a(struct dss_pll *pll,
528                 const struct dss_pll_clock_info *cinfo);
529 int dss_pll_write_config_type_b(struct dss_pll *pll,
530                 const struct dss_pll_clock_info *cinfo);
531 int dss_pll_wait_reset_done(struct dss_pll *pll);
532
533 extern struct platform_driver omap_dsshw_driver;
534 extern struct platform_driver omap_dispchw_driver;
535 #ifdef CONFIG_OMAP2_DSS_DSI
536 extern struct platform_driver omap_dsihw_driver;
537 #endif
538 #ifdef CONFIG_OMAP2_DSS_VENC
539 extern struct platform_driver omap_venchw_driver;
540 #endif
541 #ifdef CONFIG_OMAP4_DSS_HDMI
542 extern struct platform_driver omapdss_hdmi4hw_driver;
543 #endif
544 #ifdef CONFIG_OMAP5_DSS_HDMI
545 extern struct platform_driver omapdss_hdmi5hw_driver;
546 #endif
547
548 #endif
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