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