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1/*
2 * Copyright (C) STMicroelectronics SA 2014
3 * Author: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics.
4 * License terms: GNU General Public License (GPL), version 2
5 */
6
7#include <linux/clk.h>
8#include <linux/component.h>
9#include <linux/module.h>
10#include <linux/platform_device.h>
11
12#include <drm/drmP.h>
13#include <drm/drm_atomic_helper.h>
14#include <drm/drm_crtc_helper.h>
15
16/* HDformatter registers */
17#define HDA_ANA_CFG 0x0000
18#define HDA_ANA_SCALE_CTRL_Y 0x0004
19#define HDA_ANA_SCALE_CTRL_CB 0x0008
20#define HDA_ANA_SCALE_CTRL_CR 0x000C
21#define HDA_ANA_ANC_CTRL 0x0010
22#define HDA_ANA_SRC_Y_CFG 0x0014
23#define HDA_COEFF_Y_PH1_TAP123 0x0018
24#define HDA_COEFF_Y_PH1_TAP456 0x001C
25#define HDA_COEFF_Y_PH2_TAP123 0x0020
26#define HDA_COEFF_Y_PH2_TAP456 0x0024
27#define HDA_COEFF_Y_PH3_TAP123 0x0028
28#define HDA_COEFF_Y_PH3_TAP456 0x002C
29#define HDA_COEFF_Y_PH4_TAP123 0x0030
30#define HDA_COEFF_Y_PH4_TAP456 0x0034
31#define HDA_ANA_SRC_C_CFG 0x0040
32#define HDA_COEFF_C_PH1_TAP123 0x0044
33#define HDA_COEFF_C_PH1_TAP456 0x0048
34#define HDA_COEFF_C_PH2_TAP123 0x004C
35#define HDA_COEFF_C_PH2_TAP456 0x0050
36#define HDA_COEFF_C_PH3_TAP123 0x0054
37#define HDA_COEFF_C_PH3_TAP456 0x0058
38#define HDA_COEFF_C_PH4_TAP123 0x005C
39#define HDA_COEFF_C_PH4_TAP456 0x0060
40#define HDA_SYNC_AWGI 0x0300
41
42/* HDA_ANA_CFG */
43#define CFG_AWG_ASYNC_EN BIT(0)
44#define CFG_AWG_ASYNC_HSYNC_MTD BIT(1)
45#define CFG_AWG_ASYNC_VSYNC_MTD BIT(2)
46#define CFG_AWG_SYNC_DEL BIT(3)
47#define CFG_AWG_FLTR_MODE_SHIFT 4
48#define CFG_AWG_FLTR_MODE_MASK (0xF << CFG_AWG_FLTR_MODE_SHIFT)
49#define CFG_AWG_FLTR_MODE_SD (0 << CFG_AWG_FLTR_MODE_SHIFT)
50#define CFG_AWG_FLTR_MODE_ED (1 << CFG_AWG_FLTR_MODE_SHIFT)
51#define CFG_AWG_FLTR_MODE_HD (2 << CFG_AWG_FLTR_MODE_SHIFT)
52#define CFG_SYNC_ON_PBPR_MASK BIT(8)
53#define CFG_PREFILTER_EN_MASK BIT(9)
54#define CFG_PBPR_SYNC_OFF_SHIFT 16
55#define CFG_PBPR_SYNC_OFF_MASK (0x7FF << CFG_PBPR_SYNC_OFF_SHIFT)
56#define CFG_PBPR_SYNC_OFF_VAL 0x117 /* Voltage dependent. stiH416 */
57
58/* Default scaling values */
59#define SCALE_CTRL_Y_DFLT 0x00C50256
60#define SCALE_CTRL_CB_DFLT 0x00DB0249
61#define SCALE_CTRL_CR_DFLT 0x00DB0249
62
63/* Video DACs control */
64#define VIDEO_DACS_CONTROL_MASK 0x0FFF
65#define VIDEO_DACS_CONTROL_SYSCFG2535 0x085C /* for stih416 */
66#define DAC_CFG_HD_OFF_SHIFT 5
67#define DAC_CFG_HD_OFF_MASK (0x7 << DAC_CFG_HD_OFF_SHIFT)
68#define VIDEO_DACS_CONTROL_SYSCFG5072 0x0120 /* for stih407 */
69#define DAC_CFG_HD_HZUVW_OFF_MASK BIT(1)
70
71
72/* Upsampler values for the alternative 2X Filter */
73#define SAMPLER_COEF_NB 8
74#define HDA_ANA_SRC_Y_CFG_ALT_2X 0x01130000
75static u32 coef_y_alt_2x[] = {
76 0x00FE83FB, 0x1F900401, 0x00000000, 0x00000000,
77 0x00F408F9, 0x055F7C25, 0x00000000, 0x00000000
78};
79
80#define HDA_ANA_SRC_C_CFG_ALT_2X 0x01750004
81static u32 coef_c_alt_2x[] = {
82 0x001305F7, 0x05274BD0, 0x00000000, 0x00000000,
83 0x0004907C, 0x09C80B9D, 0x00000000, 0x00000000
84};
85
86/* Upsampler values for the 4X Filter */
87#define HDA_ANA_SRC_Y_CFG_4X 0x01ED0005
88#define HDA_ANA_SRC_C_CFG_4X 0x01ED0004
89static u32 coef_yc_4x[] = {
90 0x00FC827F, 0x008FE20B, 0x00F684FC, 0x050F7C24,
91 0x00F4857C, 0x0A1F402E, 0x00FA027F, 0x0E076E1D
92};
93
94/* AWG instructions for some video modes */
95#define AWG_MAX_INST 64
96
97/* 720p@50 */
98static u32 AWGi_720p_50[] = {
99 0x00000971, 0x00000C26, 0x0000013B, 0x00000CDA,
100 0x00000104, 0x00000E7E, 0x00000E7F, 0x0000013B,
101 0x00000D8E, 0x00000104, 0x00001804, 0x00000971,
102 0x00000C26, 0x0000003B, 0x00000FB4, 0x00000FB5,
103 0x00000104, 0x00001AE8
104};
105
106#define NN_720p_50 ARRAY_SIZE(AWGi_720p_50)
107
108/* 720p@60 */
109static u32 AWGi_720p_60[] = {
110 0x00000971, 0x00000C26, 0x0000013B, 0x00000CDA,
111 0x00000104, 0x00000E7E, 0x00000E7F, 0x0000013B,
112 0x00000C44, 0x00000104, 0x00001804, 0x00000971,
113 0x00000C26, 0x0000003B, 0x00000F0F, 0x00000F10,
114 0x00000104, 0x00001AE8
115};
116
117#define NN_720p_60 ARRAY_SIZE(AWGi_720p_60)
118
119/* 1080p@30 */
120static u32 AWGi_1080p_30[] = {
121 0x00000971, 0x00000C2A, 0x0000013B, 0x00000C56,
122 0x00000104, 0x00000FDC, 0x00000FDD, 0x0000013B,
123 0x00000C2A, 0x00000104, 0x00001804, 0x00000971,
124 0x00000C2A, 0x0000003B, 0x00000EBE, 0x00000EBF,
125 0x00000EBF, 0x00000104, 0x00001A2F, 0x00001C4B,
126 0x00001C52
127};
128
129#define NN_1080p_30 ARRAY_SIZE(AWGi_1080p_30)
130
131/* 1080p@25 */
132static u32 AWGi_1080p_25[] = {
133 0x00000971, 0x00000C2A, 0x0000013B, 0x00000C56,
134 0x00000104, 0x00000FDC, 0x00000FDD, 0x0000013B,
135 0x00000DE2, 0x00000104, 0x00001804, 0x00000971,
136 0x00000C2A, 0x0000003B, 0x00000F51, 0x00000F51,
137 0x00000F52, 0x00000104, 0x00001A2F, 0x00001C4B,
138 0x00001C52
139};
140
141#define NN_1080p_25 ARRAY_SIZE(AWGi_1080p_25)
142
143/* 1080p@24 */
144static u32 AWGi_1080p_24[] = {
145 0x00000971, 0x00000C2A, 0x0000013B, 0x00000C56,
146 0x00000104, 0x00000FDC, 0x00000FDD, 0x0000013B,
147 0x00000E50, 0x00000104, 0x00001804, 0x00000971,
148 0x00000C2A, 0x0000003B, 0x00000F76, 0x00000F76,
149 0x00000F76, 0x00000104, 0x00001A2F, 0x00001C4B,
150 0x00001C52
151};
152
153#define NN_1080p_24 ARRAY_SIZE(AWGi_1080p_24)
154
155/* 720x480p@60 */
156static u32 AWGi_720x480p_60[] = {
157 0x00000904, 0x00000F18, 0x0000013B, 0x00001805,
158 0x00000904, 0x00000C3D, 0x0000003B, 0x00001A06
159};
160
161#define NN_720x480p_60 ARRAY_SIZE(AWGi_720x480p_60)
162
163/* Video mode category */
164enum sti_hda_vid_cat {
165 VID_SD,
166 VID_ED,
167 VID_HD_74M,
168 VID_HD_148M
169};
170
171struct sti_hda_video_config {
172 struct drm_display_mode mode;
173 u32 *awg_instr;
174 int nb_instr;
175 enum sti_hda_vid_cat vid_cat;
176};
177
178/* HD analog supported modes
179 * Interlaced modes may be added when supported by the whole display chain
180 */
181static const struct sti_hda_video_config hda_supported_modes[] = {
182 /* 1080p30 74.250Mhz */
183 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74250, 1920, 2008,
184 2052, 2200, 0, 1080, 1084, 1089, 1125, 0,
185 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
186 AWGi_1080p_30, NN_1080p_30, VID_HD_74M},
187 /* 1080p30 74.176Mhz */
188 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74176, 1920, 2008,
189 2052, 2200, 0, 1080, 1084, 1089, 1125, 0,
190 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
191 AWGi_1080p_30, NN_1080p_30, VID_HD_74M},
192 /* 1080p24 74.250Mhz */
193 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74250, 1920, 2558,
194 2602, 2750, 0, 1080, 1084, 1089, 1125, 0,
195 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
196 AWGi_1080p_24, NN_1080p_24, VID_HD_74M},
197 /* 1080p24 74.176Mhz */
198 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74176, 1920, 2558,
199 2602, 2750, 0, 1080, 1084, 1089, 1125, 0,
200 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
201 AWGi_1080p_24, NN_1080p_24, VID_HD_74M},
202 /* 1080p25 74.250Mhz */
203 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74250, 1920, 2448,
204 2492, 2640, 0, 1080, 1084, 1089, 1125, 0,
205 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
206 AWGi_1080p_25, NN_1080p_25, VID_HD_74M},
207 /* 720p60 74.250Mhz */
208 {{DRM_MODE("1280x720", DRM_MODE_TYPE_DRIVER, 74250, 1280, 1390,
209 1430, 1650, 0, 720, 725, 730, 750, 0,
210 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
211 AWGi_720p_60, NN_720p_60, VID_HD_74M},
212 /* 720p60 74.176Mhz */
213 {{DRM_MODE("1280x720", DRM_MODE_TYPE_DRIVER, 74176, 1280, 1390,
214 1430, 1650, 0, 720, 725, 730, 750, 0,
215 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
216 AWGi_720p_60, NN_720p_60, VID_HD_74M},
217 /* 720p50 74.250Mhz */
218 {{DRM_MODE("1280x720", DRM_MODE_TYPE_DRIVER, 74250, 1280, 1720,
219 1760, 1980, 0, 720, 725, 730, 750, 0,
220 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
221 AWGi_720p_50, NN_720p_50, VID_HD_74M},
222 /* 720x480p60 27.027Mhz */
223 {{DRM_MODE("720x480", DRM_MODE_TYPE_DRIVER, 27027, 720, 736,
224 798, 858, 0, 480, 489, 495, 525, 0,
225 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)},
226 AWGi_720x480p_60, NN_720x480p_60, VID_ED},
227 /* 720x480p60 27.000Mhz */
228 {{DRM_MODE("720x480", DRM_MODE_TYPE_DRIVER, 27000, 720, 736,
229 798, 858, 0, 480, 489, 495, 525, 0,
230 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)},
231 AWGi_720x480p_60, NN_720x480p_60, VID_ED}
232};
233
234/**
235 * STI hd analog structure
236 *
237 * @dev: driver device
238 * @drm_dev: pointer to drm device
239 * @mode: current display mode selected
240 * @regs: HD analog register
241 * @video_dacs_ctrl: video DACS control register
242 * @enabled: true if HD analog is enabled else false
243 */
244struct sti_hda {
245 struct device dev;
246 struct drm_device *drm_dev;
247 struct drm_display_mode mode;
248 void __iomem *regs;
249 void __iomem *video_dacs_ctrl;
250 struct clk *clk_pix;
251 struct clk *clk_hddac;
252 bool enabled;
253};
254
255struct sti_hda_connector {
256 struct drm_connector drm_connector;
257 struct drm_encoder *encoder;
258 struct sti_hda *hda;
259};
260
261#define to_sti_hda_connector(x) \
262 container_of(x, struct sti_hda_connector, drm_connector)
263
264static u32 hda_read(struct sti_hda *hda, int offset)
265{
266 return readl(hda->regs + offset);
267}
268
269static void hda_write(struct sti_hda *hda, u32 val, int offset)
270{
271 writel(val, hda->regs + offset);
272}
273
274/**
275 * Search for a video mode in the supported modes table
276 *
277 * @mode: mode being searched
278 * @idx: index of the found mode
279 *
280 * Return true if mode is found
281 */
282static bool hda_get_mode_idx(struct drm_display_mode mode, int *idx)
283{
284 unsigned int i;
285
286 for (i = 0; i < ARRAY_SIZE(hda_supported_modes); i++)
287 if (drm_mode_equal(&hda_supported_modes[i].mode, &mode)) {
288 *idx = i;
289 return true;
290 }
291 return false;
292}
293
294/**
295 * Enable the HD DACS
296 *
297 * @hda: pointer to HD analog structure
298 * @enable: true if HD DACS need to be enabled, else false
299 */
300static void hda_enable_hd_dacs(struct sti_hda *hda, bool enable)
301{
302 u32 mask;
303
304 if (hda->video_dacs_ctrl) {
305 u32 val;
306
307 switch ((u32)hda->video_dacs_ctrl & VIDEO_DACS_CONTROL_MASK) {
308 case VIDEO_DACS_CONTROL_SYSCFG2535:
309 mask = DAC_CFG_HD_OFF_MASK;
310 break;
311 case VIDEO_DACS_CONTROL_SYSCFG5072:
312 mask = DAC_CFG_HD_HZUVW_OFF_MASK;
313 break;
314 default:
315 DRM_INFO("Video DACS control register not supported!");
316 return;
317 }
318
319 val = readl(hda->video_dacs_ctrl);
320 if (enable)
321 val &= ~mask;
322 else
323 val |= mask;
324
325 writel(val, hda->video_dacs_ctrl);
326 }
327}
328
329#define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \
330 readl(hda->regs + reg))
331
332static void hda_dbg_cfg(struct seq_file *s, int val)
333{
334 seq_puts(s, "\tAWG ");
335 seq_puts(s, val & CFG_AWG_ASYNC_EN ? "enabled" : "disabled");
336}
337
338static void hda_dbg_awg_microcode(struct seq_file *s, void __iomem *reg)
339{
340 unsigned int i;
341
342 seq_puts(s, "\n\n");
343 seq_puts(s, " HDA AWG microcode:");
344 for (i = 0; i < AWG_MAX_INST; i++) {
345 if (i % 8 == 0)
346 seq_printf(s, "\n %04X:", i);
347 seq_printf(s, " %04X", readl(reg + i * 4));
348 }
349}
350
351static void hda_dbg_video_dacs_ctrl(struct seq_file *s, void __iomem *reg)
352{
353 u32 val = readl(reg);
354 u32 mask;
355
356 switch ((u32)reg & VIDEO_DACS_CONTROL_MASK) {
357 case VIDEO_DACS_CONTROL_SYSCFG2535:
358 mask = DAC_CFG_HD_OFF_MASK;
359 break;
360 case VIDEO_DACS_CONTROL_SYSCFG5072:
361 mask = DAC_CFG_HD_HZUVW_OFF_MASK;
362 break;
363 default:
364 DRM_DEBUG_DRIVER("Warning: DACS ctrl register not supported!");
365 return;
366 }
367
368 seq_puts(s, "\n");
369 seq_printf(s, "\n %-25s 0x%08X", "VIDEO_DACS_CONTROL", val);
370 seq_puts(s, "\tHD DACs ");
371 seq_puts(s, val & mask ? "disabled" : "enabled");
372}
373
374static int hda_dbg_show(struct seq_file *s, void *data)
375{
376 struct drm_info_node *node = s->private;
377 struct sti_hda *hda = (struct sti_hda *)node->info_ent->data;
378 struct drm_device *dev = node->minor->dev;
379 int ret;
380
381 ret = mutex_lock_interruptible(&dev->struct_mutex);
382 if (ret)
383 return ret;
384
385 seq_printf(s, "HD Analog: (vaddr = 0x%p)", hda->regs);
386 DBGFS_DUMP(HDA_ANA_CFG);
387 hda_dbg_cfg(s, readl(hda->regs + HDA_ANA_CFG));
388 DBGFS_DUMP(HDA_ANA_SCALE_CTRL_Y);
389 DBGFS_DUMP(HDA_ANA_SCALE_CTRL_CB);
390 DBGFS_DUMP(HDA_ANA_SCALE_CTRL_CR);
391 DBGFS_DUMP(HDA_ANA_ANC_CTRL);
392 DBGFS_DUMP(HDA_ANA_SRC_Y_CFG);
393 DBGFS_DUMP(HDA_ANA_SRC_C_CFG);
394 hda_dbg_awg_microcode(s, hda->regs + HDA_SYNC_AWGI);
395 if (hda->video_dacs_ctrl)
396 hda_dbg_video_dacs_ctrl(s, hda->video_dacs_ctrl);
397 seq_puts(s, "\n");
398
399 mutex_unlock(&dev->struct_mutex);
400 return 0;
401}
402
403static struct drm_info_list hda_debugfs_files[] = {
404 { "hda", hda_dbg_show, 0, NULL },
405};
406
407static void hda_debugfs_exit(struct sti_hda *hda, struct drm_minor *minor)
408{
409 drm_debugfs_remove_files(hda_debugfs_files,
410 ARRAY_SIZE(hda_debugfs_files),
411 minor);
412}
413
414static int hda_debugfs_init(struct sti_hda *hda, struct drm_minor *minor)
415{
416 unsigned int i;
417
418 for (i = 0; i < ARRAY_SIZE(hda_debugfs_files); i++)
419 hda_debugfs_files[i].data = hda;
420
421 return drm_debugfs_create_files(hda_debugfs_files,
422 ARRAY_SIZE(hda_debugfs_files),
423 minor->debugfs_root, minor);
424}
425
426/**
427 * Configure AWG, writing instructions
428 *
429 * @hda: pointer to HD analog structure
430 * @awg_instr: pointer to AWG instructions table
431 * @nb: nb of AWG instructions
432 */
433static void sti_hda_configure_awg(struct sti_hda *hda, u32 *awg_instr, int nb)
434{
435 unsigned int i;
436
437 DRM_DEBUG_DRIVER("\n");
438
439 for (i = 0; i < nb; i++)
440 hda_write(hda, awg_instr[i], HDA_SYNC_AWGI + i * 4);
441 for (i = nb; i < AWG_MAX_INST; i++)
442 hda_write(hda, 0, HDA_SYNC_AWGI + i * 4);
443}
444
445static void sti_hda_disable(struct drm_bridge *bridge)
446{
447 struct sti_hda *hda = bridge->driver_private;
448 u32 val;
449
450 if (!hda->enabled)
451 return;
452
453 DRM_DEBUG_DRIVER("\n");
454
455 /* Disable HD DAC and AWG */
456 val = hda_read(hda, HDA_ANA_CFG);
457 val &= ~CFG_AWG_ASYNC_EN;
458 hda_write(hda, val, HDA_ANA_CFG);
459 hda_write(hda, 0, HDA_ANA_ANC_CTRL);
460
461 hda_enable_hd_dacs(hda, false);
462
463 /* Disable/unprepare hda clock */
464 clk_disable_unprepare(hda->clk_hddac);
465 clk_disable_unprepare(hda->clk_pix);
466
467 hda->enabled = false;
468}
469
470static void sti_hda_pre_enable(struct drm_bridge *bridge)
471{
472 struct sti_hda *hda = bridge->driver_private;
473 u32 val, i, mode_idx;
474 u32 src_filter_y, src_filter_c;
475 u32 *coef_y, *coef_c;
476 u32 filter_mode;
477
478 DRM_DEBUG_DRIVER("\n");
479
480 if (hda->enabled)
481 return;
482
483 /* Prepare/enable clocks */
484 if (clk_prepare_enable(hda->clk_pix))
485 DRM_ERROR("Failed to prepare/enable hda_pix clk\n");
486 if (clk_prepare_enable(hda->clk_hddac))
487 DRM_ERROR("Failed to prepare/enable hda_hddac clk\n");
488
489 if (!hda_get_mode_idx(hda->mode, &mode_idx)) {
490 DRM_ERROR("Undefined mode\n");
491 return;
492 }
493
494 switch (hda_supported_modes[mode_idx].vid_cat) {
495 case VID_HD_148M:
496 DRM_ERROR("Beyond HD analog capabilities\n");
497 return;
498 case VID_HD_74M:
499 /* HD use alternate 2x filter */
500 filter_mode = CFG_AWG_FLTR_MODE_HD;
501 src_filter_y = HDA_ANA_SRC_Y_CFG_ALT_2X;
502 src_filter_c = HDA_ANA_SRC_C_CFG_ALT_2X;
503 coef_y = coef_y_alt_2x;
504 coef_c = coef_c_alt_2x;
505 break;
506 case VID_ED:
507 /* ED uses 4x filter */
508 filter_mode = CFG_AWG_FLTR_MODE_ED;
509 src_filter_y = HDA_ANA_SRC_Y_CFG_4X;
510 src_filter_c = HDA_ANA_SRC_C_CFG_4X;
511 coef_y = coef_yc_4x;
512 coef_c = coef_yc_4x;
513 break;
514 case VID_SD:
515 DRM_ERROR("Not supported\n");
516 return;
517 default:
518 DRM_ERROR("Undefined resolution\n");
519 return;
520 }
521 DRM_DEBUG_DRIVER("Using HDA mode #%d\n", mode_idx);
522
523 /* Enable HD Video DACs */
524 hda_enable_hd_dacs(hda, true);
525
526 /* Configure scaler */
527 hda_write(hda, SCALE_CTRL_Y_DFLT, HDA_ANA_SCALE_CTRL_Y);
528 hda_write(hda, SCALE_CTRL_CB_DFLT, HDA_ANA_SCALE_CTRL_CB);
529 hda_write(hda, SCALE_CTRL_CR_DFLT, HDA_ANA_SCALE_CTRL_CR);
530
531 /* Configure sampler */
532 hda_write(hda , src_filter_y, HDA_ANA_SRC_Y_CFG);
533 hda_write(hda, src_filter_c, HDA_ANA_SRC_C_CFG);
534 for (i = 0; i < SAMPLER_COEF_NB; i++) {
535 hda_write(hda, coef_y[i], HDA_COEFF_Y_PH1_TAP123 + i * 4);
536 hda_write(hda, coef_c[i], HDA_COEFF_C_PH1_TAP123 + i * 4);
537 }
538
539 /* Configure main HDFormatter */
540 val = 0;
541 val |= (hda->mode.flags & DRM_MODE_FLAG_INTERLACE) ?
542 0 : CFG_AWG_ASYNC_VSYNC_MTD;
543 val |= (CFG_PBPR_SYNC_OFF_VAL << CFG_PBPR_SYNC_OFF_SHIFT);
544 val |= filter_mode;
545 hda_write(hda, val, HDA_ANA_CFG);
546
547 /* Configure AWG */
548 sti_hda_configure_awg(hda, hda_supported_modes[mode_idx].awg_instr,
549 hda_supported_modes[mode_idx].nb_instr);
550
551 /* Enable AWG */
552 val = hda_read(hda, HDA_ANA_CFG);
553 val |= CFG_AWG_ASYNC_EN;
554 hda_write(hda, val, HDA_ANA_CFG);
555
556 hda->enabled = true;
557}
558
559static void sti_hda_set_mode(struct drm_bridge *bridge,
560 struct drm_display_mode *mode,
561 struct drm_display_mode *adjusted_mode)
562{
563 struct sti_hda *hda = bridge->driver_private;
564 u32 mode_idx;
565 int hddac_rate;
566 int ret;
567
568 DRM_DEBUG_DRIVER("\n");
569
570 memcpy(&hda->mode, mode, sizeof(struct drm_display_mode));
571
572 if (!hda_get_mode_idx(hda->mode, &mode_idx)) {
573 DRM_ERROR("Undefined mode\n");
574 return;
575 }
576
577 switch (hda_supported_modes[mode_idx].vid_cat) {
578 case VID_HD_74M:
579 /* HD use alternate 2x filter */
580 hddac_rate = mode->clock * 1000 * 2;
581 break;
582 case VID_ED:
583 /* ED uses 4x filter */
584 hddac_rate = mode->clock * 1000 * 4;
585 break;
586 default:
587 DRM_ERROR("Undefined mode\n");
588 return;
589 }
590
591 /* HD DAC = 148.5Mhz or 108 Mhz */
592 ret = clk_set_rate(hda->clk_hddac, hddac_rate);
593 if (ret < 0)
594 DRM_ERROR("Cannot set rate (%dHz) for hda_hddac clk\n",
595 hddac_rate);
596
597 /* HDformatter clock = compositor clock */
598 ret = clk_set_rate(hda->clk_pix, mode->clock * 1000);
599 if (ret < 0)
600 DRM_ERROR("Cannot set rate (%dHz) for hda_pix clk\n",
601 mode->clock * 1000);
602}
603
604static void sti_hda_bridge_nope(struct drm_bridge *bridge)
605{
606 /* do nothing */
607}
608
609static const struct drm_bridge_funcs sti_hda_bridge_funcs = {
610 .pre_enable = sti_hda_pre_enable,
611 .enable = sti_hda_bridge_nope,
612 .disable = sti_hda_disable,
613 .post_disable = sti_hda_bridge_nope,
614 .mode_set = sti_hda_set_mode,
615};
616
617static int sti_hda_connector_get_modes(struct drm_connector *connector)
618{
619 unsigned int i;
620 int count = 0;
621 struct sti_hda_connector *hda_connector
622 = to_sti_hda_connector(connector);
623 struct sti_hda *hda = hda_connector->hda;
624
625 DRM_DEBUG_DRIVER("\n");
626
627 for (i = 0; i < ARRAY_SIZE(hda_supported_modes); i++) {
628 struct drm_display_mode *mode =
629 drm_mode_duplicate(hda->drm_dev,
630 &hda_supported_modes[i].mode);
631 if (!mode)
632 continue;
633 mode->vrefresh = drm_mode_vrefresh(mode);
634
635 /* the first mode is the preferred mode */
636 if (i == 0)
637 mode->type |= DRM_MODE_TYPE_PREFERRED;
638
639 drm_mode_probed_add(connector, mode);
640 count++;
641 }
642
643 return count;
644}
645
646#define CLK_TOLERANCE_HZ 50
647
648static int sti_hda_connector_mode_valid(struct drm_connector *connector,
649 struct drm_display_mode *mode)
650{
651 int target = mode->clock * 1000;
652 int target_min = target - CLK_TOLERANCE_HZ;
653 int target_max = target + CLK_TOLERANCE_HZ;
654 int result;
655 int idx;
656 struct sti_hda_connector *hda_connector
657 = to_sti_hda_connector(connector);
658 struct sti_hda *hda = hda_connector->hda;
659
660 if (!hda_get_mode_idx(*mode, &idx)) {
661 return MODE_BAD;
662 } else {
663 result = clk_round_rate(hda->clk_pix, target);
664
665 DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n",
666 target, result);
667
668 if ((result < target_min) || (result > target_max)) {
669 DRM_DEBUG_DRIVER("hda pixclk=%d not supported\n",
670 target);
671 return MODE_BAD;
672 }
673 }
674
675 return MODE_OK;
676}
677
678struct drm_encoder *sti_hda_best_encoder(struct drm_connector *connector)
679{
680 struct sti_hda_connector *hda_connector
681 = to_sti_hda_connector(connector);
682
683 /* Best encoder is the one associated during connector creation */
684 return hda_connector->encoder;
685}
686
687static const
688struct drm_connector_helper_funcs sti_hda_connector_helper_funcs = {
689 .get_modes = sti_hda_connector_get_modes,
690 .mode_valid = sti_hda_connector_mode_valid,
691 .best_encoder = sti_hda_best_encoder,
692};
693
694static enum drm_connector_status
695sti_hda_connector_detect(struct drm_connector *connector, bool force)
696{
697 return connector_status_connected;
698}
699
700static void sti_hda_connector_destroy(struct drm_connector *connector)
701{
702 struct sti_hda_connector *hda_connector
703 = to_sti_hda_connector(connector);
704
705 drm_connector_unregister(connector);
706 drm_connector_cleanup(connector);
707 kfree(hda_connector);
708}
709
710static const struct drm_connector_funcs sti_hda_connector_funcs = {
711 .dpms = drm_atomic_helper_connector_dpms,
712 .fill_modes = drm_helper_probe_single_connector_modes,
713 .detect = sti_hda_connector_detect,
714 .destroy = sti_hda_connector_destroy,
715 .reset = drm_atomic_helper_connector_reset,
716 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
717 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
718};
719
720static struct drm_encoder *sti_hda_find_encoder(struct drm_device *dev)
721{
722 struct drm_encoder *encoder;
723
724 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
725 if (encoder->encoder_type == DRM_MODE_ENCODER_DAC)
726 return encoder;
727 }
728
729 return NULL;
730}
731
732static int sti_hda_bind(struct device *dev, struct device *master, void *data)
733{
734 struct sti_hda *hda = dev_get_drvdata(dev);
735 struct drm_device *drm_dev = data;
736 struct drm_encoder *encoder;
737 struct sti_hda_connector *connector;
738 struct drm_connector *drm_connector;
739 struct drm_bridge *bridge;
740 int err;
741
742 /* Set the drm device handle */
743 hda->drm_dev = drm_dev;
744
745 encoder = sti_hda_find_encoder(drm_dev);
746 if (!encoder)
747 return -ENOMEM;
748
749 connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
750 if (!connector)
751 return -ENOMEM;
752
753 connector->hda = hda;
754
755 bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL);
756 if (!bridge)
757 return -ENOMEM;
758
759 bridge->driver_private = hda;
760 bridge->funcs = &sti_hda_bridge_funcs;
761 drm_bridge_attach(drm_dev, bridge);
762
763 encoder->bridge = bridge;
764 connector->encoder = encoder;
765
766 drm_connector = (struct drm_connector *)connector;
767
768 drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
769
770 drm_connector_init(drm_dev, drm_connector,
771 &sti_hda_connector_funcs, DRM_MODE_CONNECTOR_Component);
772 drm_connector_helper_add(drm_connector,
773 &sti_hda_connector_helper_funcs);
774
775 err = drm_connector_register(drm_connector);
776 if (err)
777 goto err_connector;
778
779 err = drm_mode_connector_attach_encoder(drm_connector, encoder);
780 if (err) {
781 DRM_ERROR("Failed to attach a connector to a encoder\n");
782 goto err_sysfs;
783 }
784
785 /* force to disable hd dacs at startup */
786 hda_enable_hd_dacs(hda, false);
787
788 if (hda_debugfs_init(hda, drm_dev->primary))
789 DRM_ERROR("HDA debugfs setup failed\n");
790
791 return 0;
792
793err_sysfs:
794 drm_connector_unregister(drm_connector);
795err_connector:
796 drm_connector_cleanup(drm_connector);
797 return -EINVAL;
798}
799
800static void sti_hda_unbind(struct device *dev,
801 struct device *master, void *data)
802{
803 struct sti_hda *hda = dev_get_drvdata(dev);
804 struct drm_device *drm_dev = data;
805
806 hda_debugfs_exit(hda, drm_dev->primary);
807}
808
809static const struct component_ops sti_hda_ops = {
810 .bind = sti_hda_bind,
811 .unbind = sti_hda_unbind,
812};
813
814static int sti_hda_probe(struct platform_device *pdev)
815{
816 struct device *dev = &pdev->dev;
817 struct sti_hda *hda;
818 struct resource *res;
819
820 DRM_INFO("%s\n", __func__);
821
822 hda = devm_kzalloc(dev, sizeof(*hda), GFP_KERNEL);
823 if (!hda)
824 return -ENOMEM;
825
826 hda->dev = pdev->dev;
827
828 /* Get resources */
829 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hda-reg");
830 if (!res) {
831 DRM_ERROR("Invalid hda resource\n");
832 return -ENOMEM;
833 }
834 hda->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
835 if (!hda->regs)
836 return -ENOMEM;
837
838 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
839 "video-dacs-ctrl");
840 if (res) {
841 hda->video_dacs_ctrl = devm_ioremap_nocache(dev, res->start,
842 resource_size(res));
843 if (!hda->video_dacs_ctrl)
844 return -ENOMEM;
845 } else {
846 /* If no existing video-dacs-ctrl resource continue the probe */
847 DRM_DEBUG_DRIVER("No video-dacs-ctrl resource\n");
848 hda->video_dacs_ctrl = NULL;
849 }
850
851 /* Get clock resources */
852 hda->clk_pix = devm_clk_get(dev, "pix");
853 if (IS_ERR(hda->clk_pix)) {
854 DRM_ERROR("Cannot get hda_pix clock\n");
855 return PTR_ERR(hda->clk_pix);
856 }
857
858 hda->clk_hddac = devm_clk_get(dev, "hddac");
859 if (IS_ERR(hda->clk_hddac)) {
860 DRM_ERROR("Cannot get hda_hddac clock\n");
861 return PTR_ERR(hda->clk_hddac);
862 }
863
864 platform_set_drvdata(pdev, hda);
865
866 return component_add(&pdev->dev, &sti_hda_ops);
867}
868
869static int sti_hda_remove(struct platform_device *pdev)
870{
871 component_del(&pdev->dev, &sti_hda_ops);
872 return 0;
873}
874
875static const struct of_device_id hda_of_match[] = {
876 { .compatible = "st,stih416-hda", },
877 { .compatible = "st,stih407-hda", },
878 { /* end node */ }
879};
880MODULE_DEVICE_TABLE(of, hda_of_match);
881
882struct platform_driver sti_hda_driver = {
883 .driver = {
884 .name = "sti-hda",
885 .owner = THIS_MODULE,
886 .of_match_table = hda_of_match,
887 },
888 .probe = sti_hda_probe,
889 .remove = sti_hda_remove,
890};
891
892MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
893MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
894MODULE_LICENSE("GPL");