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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) STMicroelectronics SA 2014
4 * Author: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics.
5 */
6
7#include <linux/clk.h>
8#include <linux/component.h>
9#include <linux/io.h>
10#include <linux/mod_devicetable.h>
11#include <linux/module.h>
12#include <linux/platform_device.h>
13#include <linux/seq_file.h>
14
15#include <drm/drm_atomic_helper.h>
16#include <drm/drm_bridge.h>
17#include <drm/drm_debugfs.h>
18#include <drm/drm_device.h>
19#include <drm/drm_file.h>
20#include <drm/drm_print.h>
21#include <drm/drm_probe_helper.h>
22
23/* HDformatter registers */
24#define HDA_ANA_CFG 0x0000
25#define HDA_ANA_SCALE_CTRL_Y 0x0004
26#define HDA_ANA_SCALE_CTRL_CB 0x0008
27#define HDA_ANA_SCALE_CTRL_CR 0x000C
28#define HDA_ANA_ANC_CTRL 0x0010
29#define HDA_ANA_SRC_Y_CFG 0x0014
30#define HDA_COEFF_Y_PH1_TAP123 0x0018
31#define HDA_COEFF_Y_PH1_TAP456 0x001C
32#define HDA_COEFF_Y_PH2_TAP123 0x0020
33#define HDA_COEFF_Y_PH2_TAP456 0x0024
34#define HDA_COEFF_Y_PH3_TAP123 0x0028
35#define HDA_COEFF_Y_PH3_TAP456 0x002C
36#define HDA_COEFF_Y_PH4_TAP123 0x0030
37#define HDA_COEFF_Y_PH4_TAP456 0x0034
38#define HDA_ANA_SRC_C_CFG 0x0040
39#define HDA_COEFF_C_PH1_TAP123 0x0044
40#define HDA_COEFF_C_PH1_TAP456 0x0048
41#define HDA_COEFF_C_PH2_TAP123 0x004C
42#define HDA_COEFF_C_PH2_TAP456 0x0050
43#define HDA_COEFF_C_PH3_TAP123 0x0054
44#define HDA_COEFF_C_PH3_TAP456 0x0058
45#define HDA_COEFF_C_PH4_TAP123 0x005C
46#define HDA_COEFF_C_PH4_TAP456 0x0060
47#define HDA_SYNC_AWGI 0x0300
48
49/* HDA_ANA_CFG */
50#define CFG_AWG_ASYNC_EN BIT(0)
51#define CFG_AWG_ASYNC_HSYNC_MTD BIT(1)
52#define CFG_AWG_ASYNC_VSYNC_MTD BIT(2)
53#define CFG_AWG_SYNC_DEL BIT(3)
54#define CFG_AWG_FLTR_MODE_SHIFT 4
55#define CFG_AWG_FLTR_MODE_MASK (0xF << CFG_AWG_FLTR_MODE_SHIFT)
56#define CFG_AWG_FLTR_MODE_SD (0 << CFG_AWG_FLTR_MODE_SHIFT)
57#define CFG_AWG_FLTR_MODE_ED (1 << CFG_AWG_FLTR_MODE_SHIFT)
58#define CFG_AWG_FLTR_MODE_HD (2 << CFG_AWG_FLTR_MODE_SHIFT)
59#define CFG_SYNC_ON_PBPR_MASK BIT(8)
60#define CFG_PREFILTER_EN_MASK BIT(9)
61#define CFG_PBPR_SYNC_OFF_SHIFT 16
62#define CFG_PBPR_SYNC_OFF_MASK (0x7FF << CFG_PBPR_SYNC_OFF_SHIFT)
63#define CFG_PBPR_SYNC_OFF_VAL 0x117 /* Voltage dependent. stiH416 */
64
65/* Default scaling values */
66#define SCALE_CTRL_Y_DFLT 0x00C50256
67#define SCALE_CTRL_CB_DFLT 0x00DB0249
68#define SCALE_CTRL_CR_DFLT 0x00DB0249
69
70/* Video DACs control */
71#define DAC_CFG_HD_HZUVW_OFF_MASK BIT(1)
72
73/* Upsampler values for the alternative 2X Filter */
74#define SAMPLER_COEF_NB 8
75#define HDA_ANA_SRC_Y_CFG_ALT_2X 0x01130000
76static u32 coef_y_alt_2x[] = {
77 0x00FE83FB, 0x1F900401, 0x00000000, 0x00000000,
78 0x00F408F9, 0x055F7C25, 0x00000000, 0x00000000
79};
80
81#define HDA_ANA_SRC_C_CFG_ALT_2X 0x01750004
82static u32 coef_c_alt_2x[] = {
83 0x001305F7, 0x05274BD0, 0x00000000, 0x00000000,
84 0x0004907C, 0x09C80B9D, 0x00000000, 0x00000000
85};
86
87/* Upsampler values for the 4X Filter */
88#define HDA_ANA_SRC_Y_CFG_4X 0x01ED0005
89#define HDA_ANA_SRC_C_CFG_4X 0x01ED0004
90static u32 coef_yc_4x[] = {
91 0x00FC827F, 0x008FE20B, 0x00F684FC, 0x050F7C24,
92 0x00F4857C, 0x0A1F402E, 0x00FA027F, 0x0E076E1D
93};
94
95/* AWG instructions for some video modes */
96#define AWG_MAX_INST 64
97
98/* 720p@50 */
99static u32 AWGi_720p_50[] = {
100 0x00000971, 0x00000C26, 0x0000013B, 0x00000CDA,
101 0x00000104, 0x00000E7E, 0x00000E7F, 0x0000013B,
102 0x00000D8E, 0x00000104, 0x00001804, 0x00000971,
103 0x00000C26, 0x0000003B, 0x00000FB4, 0x00000FB5,
104 0x00000104, 0x00001AE8
105};
106
107#define NN_720p_50 ARRAY_SIZE(AWGi_720p_50)
108
109/* 720p@60 */
110static u32 AWGi_720p_60[] = {
111 0x00000971, 0x00000C26, 0x0000013B, 0x00000CDA,
112 0x00000104, 0x00000E7E, 0x00000E7F, 0x0000013B,
113 0x00000C44, 0x00000104, 0x00001804, 0x00000971,
114 0x00000C26, 0x0000003B, 0x00000F0F, 0x00000F10,
115 0x00000104, 0x00001AE8
116};
117
118#define NN_720p_60 ARRAY_SIZE(AWGi_720p_60)
119
120/* 1080p@30 */
121static u32 AWGi_1080p_30[] = {
122 0x00000971, 0x00000C2A, 0x0000013B, 0x00000C56,
123 0x00000104, 0x00000FDC, 0x00000FDD, 0x0000013B,
124 0x00000C2A, 0x00000104, 0x00001804, 0x00000971,
125 0x00000C2A, 0x0000003B, 0x00000EBE, 0x00000EBF,
126 0x00000EBF, 0x00000104, 0x00001A2F, 0x00001C4B,
127 0x00001C52
128};
129
130#define NN_1080p_30 ARRAY_SIZE(AWGi_1080p_30)
131
132/* 1080p@25 */
133static u32 AWGi_1080p_25[] = {
134 0x00000971, 0x00000C2A, 0x0000013B, 0x00000C56,
135 0x00000104, 0x00000FDC, 0x00000FDD, 0x0000013B,
136 0x00000DE2, 0x00000104, 0x00001804, 0x00000971,
137 0x00000C2A, 0x0000003B, 0x00000F51, 0x00000F51,
138 0x00000F52, 0x00000104, 0x00001A2F, 0x00001C4B,
139 0x00001C52
140};
141
142#define NN_1080p_25 ARRAY_SIZE(AWGi_1080p_25)
143
144/* 1080p@24 */
145static u32 AWGi_1080p_24[] = {
146 0x00000971, 0x00000C2A, 0x0000013B, 0x00000C56,
147 0x00000104, 0x00000FDC, 0x00000FDD, 0x0000013B,
148 0x00000E50, 0x00000104, 0x00001804, 0x00000971,
149 0x00000C2A, 0x0000003B, 0x00000F76, 0x00000F76,
150 0x00000F76, 0x00000104, 0x00001A2F, 0x00001C4B,
151 0x00001C52
152};
153
154#define NN_1080p_24 ARRAY_SIZE(AWGi_1080p_24)
155
156/* 720x480p@60 */
157static u32 AWGi_720x480p_60[] = {
158 0x00000904, 0x00000F18, 0x0000013B, 0x00001805,
159 0x00000904, 0x00000C3D, 0x0000003B, 0x00001A06
160};
161
162#define NN_720x480p_60 ARRAY_SIZE(AWGi_720x480p_60)
163
164/* Video mode category */
165enum sti_hda_vid_cat {
166 VID_SD,
167 VID_ED,
168 VID_HD_74M,
169 VID_HD_148M
170};
171
172struct sti_hda_video_config {
173 struct drm_display_mode mode;
174 u32 *awg_instr;
175 int nb_instr;
176 enum sti_hda_vid_cat vid_cat;
177};
178
179/* HD analog supported modes
180 * Interlaced modes may be added when supported by the whole display chain
181 */
182static const struct sti_hda_video_config hda_supported_modes[] = {
183 /* 1080p30 74.250Mhz */
184 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74250, 1920, 2008,
185 2052, 2200, 0, 1080, 1084, 1089, 1125, 0,
186 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
187 AWGi_1080p_30, NN_1080p_30, VID_HD_74M},
188 /* 1080p30 74.176Mhz */
189 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74176, 1920, 2008,
190 2052, 2200, 0, 1080, 1084, 1089, 1125, 0,
191 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
192 AWGi_1080p_30, NN_1080p_30, VID_HD_74M},
193 /* 1080p24 74.250Mhz */
194 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74250, 1920, 2558,
195 2602, 2750, 0, 1080, 1084, 1089, 1125, 0,
196 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
197 AWGi_1080p_24, NN_1080p_24, VID_HD_74M},
198 /* 1080p24 74.176Mhz */
199 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74176, 1920, 2558,
200 2602, 2750, 0, 1080, 1084, 1089, 1125, 0,
201 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
202 AWGi_1080p_24, NN_1080p_24, VID_HD_74M},
203 /* 1080p25 74.250Mhz */
204 {{DRM_MODE("1920x1080", DRM_MODE_TYPE_DRIVER, 74250, 1920, 2448,
205 2492, 2640, 0, 1080, 1084, 1089, 1125, 0,
206 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
207 AWGi_1080p_25, NN_1080p_25, VID_HD_74M},
208 /* 720p60 74.250Mhz */
209 {{DRM_MODE("1280x720", DRM_MODE_TYPE_DRIVER, 74250, 1280, 1390,
210 1430, 1650, 0, 720, 725, 730, 750, 0,
211 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
212 AWGi_720p_60, NN_720p_60, VID_HD_74M},
213 /* 720p60 74.176Mhz */
214 {{DRM_MODE("1280x720", DRM_MODE_TYPE_DRIVER, 74176, 1280, 1390,
215 1430, 1650, 0, 720, 725, 730, 750, 0,
216 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
217 AWGi_720p_60, NN_720p_60, VID_HD_74M},
218 /* 720p50 74.250Mhz */
219 {{DRM_MODE("1280x720", DRM_MODE_TYPE_DRIVER, 74250, 1280, 1720,
220 1760, 1980, 0, 720, 725, 730, 750, 0,
221 DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC)},
222 AWGi_720p_50, NN_720p_50, VID_HD_74M},
223 /* 720x480p60 27.027Mhz */
224 {{DRM_MODE("720x480", DRM_MODE_TYPE_DRIVER, 27027, 720, 736,
225 798, 858, 0, 480, 489, 495, 525, 0,
226 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)},
227 AWGi_720x480p_60, NN_720x480p_60, VID_ED},
228 /* 720x480p60 27.000Mhz */
229 {{DRM_MODE("720x480", DRM_MODE_TYPE_DRIVER, 27000, 720, 736,
230 798, 858, 0, 480, 489, 495, 525, 0,
231 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)},
232 AWGi_720x480p_60, NN_720x480p_60, VID_ED}
233};
234
235/*
236 * STI hd analog structure
237 *
238 * @dev: driver device
239 * @drm_dev: pointer to drm device
240 * @mode: current display mode selected
241 * @regs: HD analog register
242 * @video_dacs_ctrl: video DACS control register
243 * @enabled: true if HD analog is enabled else false
244 */
245struct sti_hda {
246 struct device dev;
247 struct drm_device *drm_dev;
248 struct drm_display_mode mode;
249 void __iomem *regs;
250 void __iomem *video_dacs_ctrl;
251 struct clk *clk_pix;
252 struct clk *clk_hddac;
253 bool enabled;
254};
255
256struct sti_hda_connector {
257 struct drm_connector drm_connector;
258 struct drm_encoder *encoder;
259 struct sti_hda *hda;
260};
261
262#define to_sti_hda_connector(x) \
263 container_of(x, struct sti_hda_connector, drm_connector)
264
265static u32 hda_read(struct sti_hda *hda, int offset)
266{
267 return readl(hda->regs + offset);
268}
269
270static void hda_write(struct sti_hda *hda, u32 val, int offset)
271{
272 writel(val, hda->regs + offset);
273}
274
275/**
276 * hda_get_mode_idx - Search for a video mode in the supported modes table
277 *
278 * @mode: mode being searched
279 * @idx: index of the found mode
280 *
281 * Return true if mode is found
282 */
283static bool hda_get_mode_idx(struct drm_display_mode mode, int *idx)
284{
285 unsigned int i;
286
287 for (i = 0; i < ARRAY_SIZE(hda_supported_modes); i++)
288 if (drm_mode_equal(&hda_supported_modes[i].mode, &mode)) {
289 *idx = i;
290 return true;
291 }
292 return false;
293}
294
295/**
296 * hda_enable_hd_dacs - Enable the HD DACS
297 *
298 * @hda: pointer to HD analog structure
299 * @enable: true if HD DACS need to be enabled, else false
300 */
301static void hda_enable_hd_dacs(struct sti_hda *hda, bool enable)
302{
303 if (hda->video_dacs_ctrl) {
304 u32 val;
305
306 val = readl(hda->video_dacs_ctrl);
307 if (enable)
308 val &= ~DAC_CFG_HD_HZUVW_OFF_MASK;
309 else
310 val |= DAC_CFG_HD_HZUVW_OFF_MASK;
311
312 writel(val, hda->video_dacs_ctrl);
313 }
314}
315
316#define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \
317 readl(hda->regs + reg))
318
319static void hda_dbg_cfg(struct seq_file *s, int val)
320{
321 seq_puts(s, "\tAWG ");
322 seq_puts(s, val & CFG_AWG_ASYNC_EN ? "enabled" : "disabled");
323}
324
325static void hda_dbg_awg_microcode(struct seq_file *s, void __iomem *reg)
326{
327 unsigned int i;
328
329 seq_puts(s, "\n\n HDA AWG microcode:");
330 for (i = 0; i < AWG_MAX_INST; i++) {
331 if (i % 8 == 0)
332 seq_printf(s, "\n %04X:", i);
333 seq_printf(s, " %04X", readl(reg + i * 4));
334 }
335}
336
337static void hda_dbg_video_dacs_ctrl(struct seq_file *s, void __iomem *reg)
338{
339 u32 val = readl(reg);
340
341 seq_printf(s, "\n\n %-25s 0x%08X", "VIDEO_DACS_CONTROL", val);
342 seq_puts(s, "\tHD DACs ");
343 seq_puts(s, val & DAC_CFG_HD_HZUVW_OFF_MASK ? "disabled" : "enabled");
344}
345
346static int hda_dbg_show(struct seq_file *s, void *data)
347{
348 struct drm_info_node *node = s->private;
349 struct sti_hda *hda = (struct sti_hda *)node->info_ent->data;
350
351 seq_printf(s, "HD Analog: (vaddr = 0x%p)", hda->regs);
352 DBGFS_DUMP(HDA_ANA_CFG);
353 hda_dbg_cfg(s, readl(hda->regs + HDA_ANA_CFG));
354 DBGFS_DUMP(HDA_ANA_SCALE_CTRL_Y);
355 DBGFS_DUMP(HDA_ANA_SCALE_CTRL_CB);
356 DBGFS_DUMP(HDA_ANA_SCALE_CTRL_CR);
357 DBGFS_DUMP(HDA_ANA_ANC_CTRL);
358 DBGFS_DUMP(HDA_ANA_SRC_Y_CFG);
359 DBGFS_DUMP(HDA_ANA_SRC_C_CFG);
360 hda_dbg_awg_microcode(s, hda->regs + HDA_SYNC_AWGI);
361 if (hda->video_dacs_ctrl)
362 hda_dbg_video_dacs_ctrl(s, hda->video_dacs_ctrl);
363 seq_putc(s, '\n');
364 return 0;
365}
366
367static struct drm_info_list hda_debugfs_files[] = {
368 { "hda", hda_dbg_show, 0, NULL },
369};
370
371static void hda_debugfs_init(struct sti_hda *hda, struct drm_minor *minor)
372{
373 unsigned int i;
374
375 for (i = 0; i < ARRAY_SIZE(hda_debugfs_files); i++)
376 hda_debugfs_files[i].data = hda;
377
378 drm_debugfs_create_files(hda_debugfs_files,
379 ARRAY_SIZE(hda_debugfs_files),
380 minor->debugfs_root, minor);
381}
382
383/**
384 * sti_hda_configure_awg - Configure AWG, writing instructions
385 *
386 * @hda: pointer to HD analog structure
387 * @awg_instr: pointer to AWG instructions table
388 * @nb: nb of AWG instructions
389 */
390static void sti_hda_configure_awg(struct sti_hda *hda, u32 *awg_instr, int nb)
391{
392 unsigned int i;
393
394 DRM_DEBUG_DRIVER("\n");
395
396 for (i = 0; i < nb; i++)
397 hda_write(hda, awg_instr[i], HDA_SYNC_AWGI + i * 4);
398 for (i = nb; i < AWG_MAX_INST; i++)
399 hda_write(hda, 0, HDA_SYNC_AWGI + i * 4);
400}
401
402static void sti_hda_disable(struct drm_bridge *bridge)
403{
404 struct sti_hda *hda = bridge->driver_private;
405 u32 val;
406
407 if (!hda->enabled)
408 return;
409
410 DRM_DEBUG_DRIVER("\n");
411
412 /* Disable HD DAC and AWG */
413 val = hda_read(hda, HDA_ANA_CFG);
414 val &= ~CFG_AWG_ASYNC_EN;
415 hda_write(hda, val, HDA_ANA_CFG);
416 hda_write(hda, 0, HDA_ANA_ANC_CTRL);
417
418 hda_enable_hd_dacs(hda, false);
419
420 /* Disable/unprepare hda clock */
421 clk_disable_unprepare(hda->clk_hddac);
422 clk_disable_unprepare(hda->clk_pix);
423
424 hda->enabled = false;
425}
426
427static void sti_hda_pre_enable(struct drm_bridge *bridge)
428{
429 struct sti_hda *hda = bridge->driver_private;
430 u32 val, i, mode_idx;
431 u32 src_filter_y, src_filter_c;
432 u32 *coef_y, *coef_c;
433 u32 filter_mode;
434
435 DRM_DEBUG_DRIVER("\n");
436
437 if (hda->enabled)
438 return;
439
440 /* Prepare/enable clocks */
441 if (clk_prepare_enable(hda->clk_pix))
442 DRM_ERROR("Failed to prepare/enable hda_pix clk\n");
443 if (clk_prepare_enable(hda->clk_hddac))
444 DRM_ERROR("Failed to prepare/enable hda_hddac clk\n");
445
446 if (!hda_get_mode_idx(hda->mode, &mode_idx)) {
447 DRM_ERROR("Undefined mode\n");
448 return;
449 }
450
451 switch (hda_supported_modes[mode_idx].vid_cat) {
452 case VID_HD_148M:
453 DRM_ERROR("Beyond HD analog capabilities\n");
454 return;
455 case VID_HD_74M:
456 /* HD use alternate 2x filter */
457 filter_mode = CFG_AWG_FLTR_MODE_HD;
458 src_filter_y = HDA_ANA_SRC_Y_CFG_ALT_2X;
459 src_filter_c = HDA_ANA_SRC_C_CFG_ALT_2X;
460 coef_y = coef_y_alt_2x;
461 coef_c = coef_c_alt_2x;
462 break;
463 case VID_ED:
464 /* ED uses 4x filter */
465 filter_mode = CFG_AWG_FLTR_MODE_ED;
466 src_filter_y = HDA_ANA_SRC_Y_CFG_4X;
467 src_filter_c = HDA_ANA_SRC_C_CFG_4X;
468 coef_y = coef_yc_4x;
469 coef_c = coef_yc_4x;
470 break;
471 case VID_SD:
472 DRM_ERROR("Not supported\n");
473 return;
474 default:
475 DRM_ERROR("Undefined resolution\n");
476 return;
477 }
478 DRM_DEBUG_DRIVER("Using HDA mode #%d\n", mode_idx);
479
480 /* Enable HD Video DACs */
481 hda_enable_hd_dacs(hda, true);
482
483 /* Configure scaler */
484 hda_write(hda, SCALE_CTRL_Y_DFLT, HDA_ANA_SCALE_CTRL_Y);
485 hda_write(hda, SCALE_CTRL_CB_DFLT, HDA_ANA_SCALE_CTRL_CB);
486 hda_write(hda, SCALE_CTRL_CR_DFLT, HDA_ANA_SCALE_CTRL_CR);
487
488 /* Configure sampler */
489 hda_write(hda , src_filter_y, HDA_ANA_SRC_Y_CFG);
490 hda_write(hda, src_filter_c, HDA_ANA_SRC_C_CFG);
491 for (i = 0; i < SAMPLER_COEF_NB; i++) {
492 hda_write(hda, coef_y[i], HDA_COEFF_Y_PH1_TAP123 + i * 4);
493 hda_write(hda, coef_c[i], HDA_COEFF_C_PH1_TAP123 + i * 4);
494 }
495
496 /* Configure main HDFormatter */
497 val = 0;
498 val |= (hda->mode.flags & DRM_MODE_FLAG_INTERLACE) ?
499 0 : CFG_AWG_ASYNC_VSYNC_MTD;
500 val |= (CFG_PBPR_SYNC_OFF_VAL << CFG_PBPR_SYNC_OFF_SHIFT);
501 val |= filter_mode;
502 hda_write(hda, val, HDA_ANA_CFG);
503
504 /* Configure AWG */
505 sti_hda_configure_awg(hda, hda_supported_modes[mode_idx].awg_instr,
506 hda_supported_modes[mode_idx].nb_instr);
507
508 /* Enable AWG */
509 val = hda_read(hda, HDA_ANA_CFG);
510 val |= CFG_AWG_ASYNC_EN;
511 hda_write(hda, val, HDA_ANA_CFG);
512
513 hda->enabled = true;
514}
515
516static void sti_hda_set_mode(struct drm_bridge *bridge,
517 const struct drm_display_mode *mode,
518 const struct drm_display_mode *adjusted_mode)
519{
520 struct sti_hda *hda = bridge->driver_private;
521 u32 mode_idx;
522 int hddac_rate;
523 int ret;
524
525 DRM_DEBUG_DRIVER("\n");
526
527 drm_mode_copy(&hda->mode, mode);
528
529 if (!hda_get_mode_idx(hda->mode, &mode_idx)) {
530 DRM_ERROR("Undefined mode\n");
531 return;
532 }
533
534 switch (hda_supported_modes[mode_idx].vid_cat) {
535 case VID_HD_74M:
536 /* HD use alternate 2x filter */
537 hddac_rate = mode->clock * 1000 * 2;
538 break;
539 case VID_ED:
540 /* ED uses 4x filter */
541 hddac_rate = mode->clock * 1000 * 4;
542 break;
543 default:
544 DRM_ERROR("Undefined mode\n");
545 return;
546 }
547
548 /* HD DAC = 148.5Mhz or 108 Mhz */
549 ret = clk_set_rate(hda->clk_hddac, hddac_rate);
550 if (ret < 0)
551 DRM_ERROR("Cannot set rate (%dHz) for hda_hddac clk\n",
552 hddac_rate);
553
554 /* HDformatter clock = compositor clock */
555 ret = clk_set_rate(hda->clk_pix, mode->clock * 1000);
556 if (ret < 0)
557 DRM_ERROR("Cannot set rate (%dHz) for hda_pix clk\n",
558 mode->clock * 1000);
559}
560
561static void sti_hda_bridge_nope(struct drm_bridge *bridge)
562{
563 /* do nothing */
564}
565
566static const struct drm_bridge_funcs sti_hda_bridge_funcs = {
567 .pre_enable = sti_hda_pre_enable,
568 .enable = sti_hda_bridge_nope,
569 .disable = sti_hda_disable,
570 .post_disable = sti_hda_bridge_nope,
571 .mode_set = sti_hda_set_mode,
572};
573
574static int sti_hda_connector_get_modes(struct drm_connector *connector)
575{
576 unsigned int i;
577 int count = 0;
578 struct sti_hda_connector *hda_connector
579 = to_sti_hda_connector(connector);
580 struct sti_hda *hda = hda_connector->hda;
581
582 DRM_DEBUG_DRIVER("\n");
583
584 for (i = 0; i < ARRAY_SIZE(hda_supported_modes); i++) {
585 struct drm_display_mode *mode =
586 drm_mode_duplicate(hda->drm_dev,
587 &hda_supported_modes[i].mode);
588 if (!mode)
589 continue;
590
591 /* the first mode is the preferred mode */
592 if (i == 0)
593 mode->type |= DRM_MODE_TYPE_PREFERRED;
594
595 drm_mode_probed_add(connector, mode);
596 count++;
597 }
598
599 return count;
600}
601
602#define CLK_TOLERANCE_HZ 50
603
604static enum drm_mode_status
605sti_hda_connector_mode_valid(struct drm_connector *connector,
606 struct drm_display_mode *mode)
607{
608 int target = mode->clock * 1000;
609 int target_min = target - CLK_TOLERANCE_HZ;
610 int target_max = target + CLK_TOLERANCE_HZ;
611 int result;
612 int idx;
613 struct sti_hda_connector *hda_connector
614 = to_sti_hda_connector(connector);
615 struct sti_hda *hda = hda_connector->hda;
616
617 if (!hda_get_mode_idx(*mode, &idx)) {
618 return MODE_BAD;
619 } else {
620 result = clk_round_rate(hda->clk_pix, target);
621
622 DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n",
623 target, result);
624
625 if ((result < target_min) || (result > target_max)) {
626 DRM_DEBUG_DRIVER("hda pixclk=%d not supported\n",
627 target);
628 return MODE_BAD;
629 }
630 }
631
632 return MODE_OK;
633}
634
635static const
636struct drm_connector_helper_funcs sti_hda_connector_helper_funcs = {
637 .get_modes = sti_hda_connector_get_modes,
638 .mode_valid = sti_hda_connector_mode_valid,
639};
640
641static int sti_hda_late_register(struct drm_connector *connector)
642{
643 struct sti_hda_connector *hda_connector
644 = to_sti_hda_connector(connector);
645 struct sti_hda *hda = hda_connector->hda;
646
647 hda_debugfs_init(hda, hda->drm_dev->primary);
648
649 return 0;
650}
651
652static const struct drm_connector_funcs sti_hda_connector_funcs = {
653 .fill_modes = drm_helper_probe_single_connector_modes,
654 .destroy = drm_connector_cleanup,
655 .reset = drm_atomic_helper_connector_reset,
656 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
657 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
658 .late_register = sti_hda_late_register,
659};
660
661static struct drm_encoder *sti_hda_find_encoder(struct drm_device *dev)
662{
663 struct drm_encoder *encoder;
664
665 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
666 if (encoder->encoder_type == DRM_MODE_ENCODER_DAC)
667 return encoder;
668 }
669
670 return NULL;
671}
672
673static int sti_hda_bind(struct device *dev, struct device *master, void *data)
674{
675 struct sti_hda *hda = dev_get_drvdata(dev);
676 struct drm_device *drm_dev = data;
677 struct drm_encoder *encoder;
678 struct sti_hda_connector *connector;
679 struct drm_connector *drm_connector;
680 struct drm_bridge *bridge;
681 int err;
682
683 /* Set the drm device handle */
684 hda->drm_dev = drm_dev;
685
686 encoder = sti_hda_find_encoder(drm_dev);
687 if (!encoder)
688 return -ENOMEM;
689
690 connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
691 if (!connector)
692 return -ENOMEM;
693
694 connector->hda = hda;
695
696 bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL);
697 if (!bridge)
698 return -ENOMEM;
699
700 bridge->driver_private = hda;
701 bridge->funcs = &sti_hda_bridge_funcs;
702 drm_bridge_attach(encoder, bridge, NULL, 0);
703
704 connector->encoder = encoder;
705
706 drm_connector = (struct drm_connector *)connector;
707
708 drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
709
710 drm_connector_init(drm_dev, drm_connector,
711 &sti_hda_connector_funcs, DRM_MODE_CONNECTOR_Component);
712 drm_connector_helper_add(drm_connector,
713 &sti_hda_connector_helper_funcs);
714
715 err = drm_connector_attach_encoder(drm_connector, encoder);
716 if (err) {
717 DRM_ERROR("Failed to attach a connector to a encoder\n");
718 goto err_sysfs;
719 }
720
721 /* force to disable hd dacs at startup */
722 hda_enable_hd_dacs(hda, false);
723
724 return 0;
725
726err_sysfs:
727 return -EINVAL;
728}
729
730static void sti_hda_unbind(struct device *dev,
731 struct device *master, void *data)
732{
733}
734
735static const struct component_ops sti_hda_ops = {
736 .bind = sti_hda_bind,
737 .unbind = sti_hda_unbind,
738};
739
740static int sti_hda_probe(struct platform_device *pdev)
741{
742 struct device *dev = &pdev->dev;
743 struct sti_hda *hda;
744 struct resource *res;
745
746 DRM_INFO("%s\n", __func__);
747
748 hda = devm_kzalloc(dev, sizeof(*hda), GFP_KERNEL);
749 if (!hda)
750 return -ENOMEM;
751
752 hda->dev = pdev->dev;
753
754 /* Get resources */
755 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hda-reg");
756 if (!res) {
757 DRM_ERROR("Invalid hda resource\n");
758 return -ENOMEM;
759 }
760 hda->regs = devm_ioremap(dev, res->start, resource_size(res));
761 if (!hda->regs)
762 return -ENOMEM;
763
764 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
765 "video-dacs-ctrl");
766 if (res) {
767 hda->video_dacs_ctrl = devm_ioremap(dev, res->start,
768 resource_size(res));
769 if (!hda->video_dacs_ctrl)
770 return -ENOMEM;
771 } else {
772 /* If no existing video-dacs-ctrl resource continue the probe */
773 DRM_DEBUG_DRIVER("No video-dacs-ctrl resource\n");
774 hda->video_dacs_ctrl = NULL;
775 }
776
777 /* Get clock resources */
778 hda->clk_pix = devm_clk_get(dev, "pix");
779 if (IS_ERR(hda->clk_pix)) {
780 DRM_ERROR("Cannot get hda_pix clock\n");
781 return PTR_ERR(hda->clk_pix);
782 }
783
784 hda->clk_hddac = devm_clk_get(dev, "hddac");
785 if (IS_ERR(hda->clk_hddac)) {
786 DRM_ERROR("Cannot get hda_hddac clock\n");
787 return PTR_ERR(hda->clk_hddac);
788 }
789
790 platform_set_drvdata(pdev, hda);
791
792 return component_add(&pdev->dev, &sti_hda_ops);
793}
794
795static void sti_hda_remove(struct platform_device *pdev)
796{
797 component_del(&pdev->dev, &sti_hda_ops);
798}
799
800static const struct of_device_id hda_of_match[] = {
801 { .compatible = "st,stih416-hda", },
802 { .compatible = "st,stih407-hda", },
803 { /* end node */ }
804};
805MODULE_DEVICE_TABLE(of, hda_of_match);
806
807struct platform_driver sti_hda_driver = {
808 .driver = {
809 .name = "sti-hda",
810 .owner = THIS_MODULE,
811 .of_match_table = hda_of_match,
812 },
813 .probe = sti_hda_probe,
814 .remove_new = sti_hda_remove,
815};
816
817MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
818MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
819MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) STMicroelectronics SA 2014
4 * Author: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics.
5 */
6
7#include <linux/clk.h>
8#include <linux/component.h>
9#include <linux/io.h>
10#include <linux/module.h>
11#include <linux/platform_device.h>
12#include <linux/seq_file.h>
13
14#include <drm/drm_atomic_helper.h>
15#include <drm/drm_bridge.h>
16#include <drm/drm_debugfs.h>
17#include <drm/drm_device.h>
18#include <drm/drm_file.h>
19#include <drm/drm_print.h>
20#include <drm/drm_probe_helper.h>
21
22/* HDformatter registers */
23#define HDA_ANA_CFG 0x0000
24#define HDA_ANA_SCALE_CTRL_Y 0x0004
25#define HDA_ANA_SCALE_CTRL_CB 0x0008
26#define HDA_ANA_SCALE_CTRL_CR 0x000C
27#define HDA_ANA_ANC_CTRL 0x0010
28#define HDA_ANA_SRC_Y_CFG 0x0014
29#define HDA_COEFF_Y_PH1_TAP123 0x0018
30#define HDA_COEFF_Y_PH1_TAP456 0x001C
31#define HDA_COEFF_Y_PH2_TAP123 0x0020
32#define HDA_COEFF_Y_PH2_TAP456 0x0024
33#define HDA_COEFF_Y_PH3_TAP123 0x0028
34#define HDA_COEFF_Y_PH3_TAP456 0x002C
35#define HDA_COEFF_Y_PH4_TAP123 0x0030
36#define HDA_COEFF_Y_PH4_TAP456 0x0034
37#define HDA_ANA_SRC_C_CFG 0x0040
38#define HDA_COEFF_C_PH1_TAP123 0x0044
39#define HDA_COEFF_C_PH1_TAP456 0x0048
40#define HDA_COEFF_C_PH2_TAP123 0x004C
41#define HDA_COEFF_C_PH2_TAP456 0x0050
42#define HDA_COEFF_C_PH3_TAP123 0x0054
43#define HDA_COEFF_C_PH3_TAP456 0x0058
44#define HDA_COEFF_C_PH4_TAP123 0x005C
45#define HDA_COEFF_C_PH4_TAP456 0x0060
46#define HDA_SYNC_AWGI 0x0300
47
48/* HDA_ANA_CFG */
49#define CFG_AWG_ASYNC_EN BIT(0)
50#define CFG_AWG_ASYNC_HSYNC_MTD BIT(1)
51#define CFG_AWG_ASYNC_VSYNC_MTD BIT(2)
52#define CFG_AWG_SYNC_DEL BIT(3)
53#define CFG_AWG_FLTR_MODE_SHIFT 4
54#define CFG_AWG_FLTR_MODE_MASK (0xF << CFG_AWG_FLTR_MODE_SHIFT)
55#define CFG_AWG_FLTR_MODE_SD (0 << CFG_AWG_FLTR_MODE_SHIFT)
56#define CFG_AWG_FLTR_MODE_ED (1 << CFG_AWG_FLTR_MODE_SHIFT)
57#define CFG_AWG_FLTR_MODE_HD (2 << CFG_AWG_FLTR_MODE_SHIFT)
58#define CFG_SYNC_ON_PBPR_MASK BIT(8)
59#define CFG_PREFILTER_EN_MASK BIT(9)
60#define CFG_PBPR_SYNC_OFF_SHIFT 16
61#define CFG_PBPR_SYNC_OFF_MASK (0x7FF << CFG_PBPR_SYNC_OFF_SHIFT)
62#define CFG_PBPR_SYNC_OFF_VAL 0x117 /* Voltage dependent. stiH416 */
63
64/* Default scaling values */
65#define SCALE_CTRL_Y_DFLT 0x00C50256
66#define SCALE_CTRL_CB_DFLT 0x00DB0249
67#define SCALE_CTRL_CR_DFLT 0x00DB0249
68
69/* Video DACs control */
70#define DAC_CFG_HD_HZUVW_OFF_MASK BIT(1)
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 * hda_get_mode_idx - 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 * hda_enable_hd_dacs - 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 if (hda->video_dacs_ctrl) {
303 u32 val;
304
305 val = readl(hda->video_dacs_ctrl);
306 if (enable)
307 val &= ~DAC_CFG_HD_HZUVW_OFF_MASK;
308 else
309 val |= DAC_CFG_HD_HZUVW_OFF_MASK;
310
311 writel(val, hda->video_dacs_ctrl);
312 }
313}
314
315#define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \
316 readl(hda->regs + reg))
317
318static void hda_dbg_cfg(struct seq_file *s, int val)
319{
320 seq_puts(s, "\tAWG ");
321 seq_puts(s, val & CFG_AWG_ASYNC_EN ? "enabled" : "disabled");
322}
323
324static void hda_dbg_awg_microcode(struct seq_file *s, void __iomem *reg)
325{
326 unsigned int i;
327
328 seq_puts(s, "\n\n HDA AWG microcode:");
329 for (i = 0; i < AWG_MAX_INST; i++) {
330 if (i % 8 == 0)
331 seq_printf(s, "\n %04X:", i);
332 seq_printf(s, " %04X", readl(reg + i * 4));
333 }
334}
335
336static void hda_dbg_video_dacs_ctrl(struct seq_file *s, void __iomem *reg)
337{
338 u32 val = readl(reg);
339
340 seq_printf(s, "\n\n %-25s 0x%08X", "VIDEO_DACS_CONTROL", val);
341 seq_puts(s, "\tHD DACs ");
342 seq_puts(s, val & DAC_CFG_HD_HZUVW_OFF_MASK ? "disabled" : "enabled");
343}
344
345static int hda_dbg_show(struct seq_file *s, void *data)
346{
347 struct drm_info_node *node = s->private;
348 struct sti_hda *hda = (struct sti_hda *)node->info_ent->data;
349
350 seq_printf(s, "HD Analog: (vaddr = 0x%p)", hda->regs);
351 DBGFS_DUMP(HDA_ANA_CFG);
352 hda_dbg_cfg(s, readl(hda->regs + HDA_ANA_CFG));
353 DBGFS_DUMP(HDA_ANA_SCALE_CTRL_Y);
354 DBGFS_DUMP(HDA_ANA_SCALE_CTRL_CB);
355 DBGFS_DUMP(HDA_ANA_SCALE_CTRL_CR);
356 DBGFS_DUMP(HDA_ANA_ANC_CTRL);
357 DBGFS_DUMP(HDA_ANA_SRC_Y_CFG);
358 DBGFS_DUMP(HDA_ANA_SRC_C_CFG);
359 hda_dbg_awg_microcode(s, hda->regs + HDA_SYNC_AWGI);
360 if (hda->video_dacs_ctrl)
361 hda_dbg_video_dacs_ctrl(s, hda->video_dacs_ctrl);
362 seq_putc(s, '\n');
363 return 0;
364}
365
366static struct drm_info_list hda_debugfs_files[] = {
367 { "hda", hda_dbg_show, 0, NULL },
368};
369
370static void hda_debugfs_init(struct sti_hda *hda, struct drm_minor *minor)
371{
372 unsigned int i;
373
374 for (i = 0; i < ARRAY_SIZE(hda_debugfs_files); i++)
375 hda_debugfs_files[i].data = hda;
376
377 drm_debugfs_create_files(hda_debugfs_files,
378 ARRAY_SIZE(hda_debugfs_files),
379 minor->debugfs_root, minor);
380}
381
382/**
383 * sti_hda_configure_awg - Configure AWG, writing instructions
384 *
385 * @hda: pointer to HD analog structure
386 * @awg_instr: pointer to AWG instructions table
387 * @nb: nb of AWG instructions
388 */
389static void sti_hda_configure_awg(struct sti_hda *hda, u32 *awg_instr, int nb)
390{
391 unsigned int i;
392
393 DRM_DEBUG_DRIVER("\n");
394
395 for (i = 0; i < nb; i++)
396 hda_write(hda, awg_instr[i], HDA_SYNC_AWGI + i * 4);
397 for (i = nb; i < AWG_MAX_INST; i++)
398 hda_write(hda, 0, HDA_SYNC_AWGI + i * 4);
399}
400
401static void sti_hda_disable(struct drm_bridge *bridge)
402{
403 struct sti_hda *hda = bridge->driver_private;
404 u32 val;
405
406 if (!hda->enabled)
407 return;
408
409 DRM_DEBUG_DRIVER("\n");
410
411 /* Disable HD DAC and AWG */
412 val = hda_read(hda, HDA_ANA_CFG);
413 val &= ~CFG_AWG_ASYNC_EN;
414 hda_write(hda, val, HDA_ANA_CFG);
415 hda_write(hda, 0, HDA_ANA_ANC_CTRL);
416
417 hda_enable_hd_dacs(hda, false);
418
419 /* Disable/unprepare hda clock */
420 clk_disable_unprepare(hda->clk_hddac);
421 clk_disable_unprepare(hda->clk_pix);
422
423 hda->enabled = false;
424}
425
426static void sti_hda_pre_enable(struct drm_bridge *bridge)
427{
428 struct sti_hda *hda = bridge->driver_private;
429 u32 val, i, mode_idx;
430 u32 src_filter_y, src_filter_c;
431 u32 *coef_y, *coef_c;
432 u32 filter_mode;
433
434 DRM_DEBUG_DRIVER("\n");
435
436 if (hda->enabled)
437 return;
438
439 /* Prepare/enable clocks */
440 if (clk_prepare_enable(hda->clk_pix))
441 DRM_ERROR("Failed to prepare/enable hda_pix clk\n");
442 if (clk_prepare_enable(hda->clk_hddac))
443 DRM_ERROR("Failed to prepare/enable hda_hddac clk\n");
444
445 if (!hda_get_mode_idx(hda->mode, &mode_idx)) {
446 DRM_ERROR("Undefined mode\n");
447 return;
448 }
449
450 switch (hda_supported_modes[mode_idx].vid_cat) {
451 case VID_HD_148M:
452 DRM_ERROR("Beyond HD analog capabilities\n");
453 return;
454 case VID_HD_74M:
455 /* HD use alternate 2x filter */
456 filter_mode = CFG_AWG_FLTR_MODE_HD;
457 src_filter_y = HDA_ANA_SRC_Y_CFG_ALT_2X;
458 src_filter_c = HDA_ANA_SRC_C_CFG_ALT_2X;
459 coef_y = coef_y_alt_2x;
460 coef_c = coef_c_alt_2x;
461 break;
462 case VID_ED:
463 /* ED uses 4x filter */
464 filter_mode = CFG_AWG_FLTR_MODE_ED;
465 src_filter_y = HDA_ANA_SRC_Y_CFG_4X;
466 src_filter_c = HDA_ANA_SRC_C_CFG_4X;
467 coef_y = coef_yc_4x;
468 coef_c = coef_yc_4x;
469 break;
470 case VID_SD:
471 DRM_ERROR("Not supported\n");
472 return;
473 default:
474 DRM_ERROR("Undefined resolution\n");
475 return;
476 }
477 DRM_DEBUG_DRIVER("Using HDA mode #%d\n", mode_idx);
478
479 /* Enable HD Video DACs */
480 hda_enable_hd_dacs(hda, true);
481
482 /* Configure scaler */
483 hda_write(hda, SCALE_CTRL_Y_DFLT, HDA_ANA_SCALE_CTRL_Y);
484 hda_write(hda, SCALE_CTRL_CB_DFLT, HDA_ANA_SCALE_CTRL_CB);
485 hda_write(hda, SCALE_CTRL_CR_DFLT, HDA_ANA_SCALE_CTRL_CR);
486
487 /* Configure sampler */
488 hda_write(hda , src_filter_y, HDA_ANA_SRC_Y_CFG);
489 hda_write(hda, src_filter_c, HDA_ANA_SRC_C_CFG);
490 for (i = 0; i < SAMPLER_COEF_NB; i++) {
491 hda_write(hda, coef_y[i], HDA_COEFF_Y_PH1_TAP123 + i * 4);
492 hda_write(hda, coef_c[i], HDA_COEFF_C_PH1_TAP123 + i * 4);
493 }
494
495 /* Configure main HDFormatter */
496 val = 0;
497 val |= (hda->mode.flags & DRM_MODE_FLAG_INTERLACE) ?
498 0 : CFG_AWG_ASYNC_VSYNC_MTD;
499 val |= (CFG_PBPR_SYNC_OFF_VAL << CFG_PBPR_SYNC_OFF_SHIFT);
500 val |= filter_mode;
501 hda_write(hda, val, HDA_ANA_CFG);
502
503 /* Configure AWG */
504 sti_hda_configure_awg(hda, hda_supported_modes[mode_idx].awg_instr,
505 hda_supported_modes[mode_idx].nb_instr);
506
507 /* Enable AWG */
508 val = hda_read(hda, HDA_ANA_CFG);
509 val |= CFG_AWG_ASYNC_EN;
510 hda_write(hda, val, HDA_ANA_CFG);
511
512 hda->enabled = true;
513}
514
515static void sti_hda_set_mode(struct drm_bridge *bridge,
516 const struct drm_display_mode *mode,
517 const struct drm_display_mode *adjusted_mode)
518{
519 struct sti_hda *hda = bridge->driver_private;
520 u32 mode_idx;
521 int hddac_rate;
522 int ret;
523
524 DRM_DEBUG_DRIVER("\n");
525
526 memcpy(&hda->mode, mode, sizeof(struct drm_display_mode));
527
528 if (!hda_get_mode_idx(hda->mode, &mode_idx)) {
529 DRM_ERROR("Undefined mode\n");
530 return;
531 }
532
533 switch (hda_supported_modes[mode_idx].vid_cat) {
534 case VID_HD_74M:
535 /* HD use alternate 2x filter */
536 hddac_rate = mode->clock * 1000 * 2;
537 break;
538 case VID_ED:
539 /* ED uses 4x filter */
540 hddac_rate = mode->clock * 1000 * 4;
541 break;
542 default:
543 DRM_ERROR("Undefined mode\n");
544 return;
545 }
546
547 /* HD DAC = 148.5Mhz or 108 Mhz */
548 ret = clk_set_rate(hda->clk_hddac, hddac_rate);
549 if (ret < 0)
550 DRM_ERROR("Cannot set rate (%dHz) for hda_hddac clk\n",
551 hddac_rate);
552
553 /* HDformatter clock = compositor clock */
554 ret = clk_set_rate(hda->clk_pix, mode->clock * 1000);
555 if (ret < 0)
556 DRM_ERROR("Cannot set rate (%dHz) for hda_pix clk\n",
557 mode->clock * 1000);
558}
559
560static void sti_hda_bridge_nope(struct drm_bridge *bridge)
561{
562 /* do nothing */
563}
564
565static const struct drm_bridge_funcs sti_hda_bridge_funcs = {
566 .pre_enable = sti_hda_pre_enable,
567 .enable = sti_hda_bridge_nope,
568 .disable = sti_hda_disable,
569 .post_disable = sti_hda_bridge_nope,
570 .mode_set = sti_hda_set_mode,
571};
572
573static int sti_hda_connector_get_modes(struct drm_connector *connector)
574{
575 unsigned int i;
576 int count = 0;
577 struct sti_hda_connector *hda_connector
578 = to_sti_hda_connector(connector);
579 struct sti_hda *hda = hda_connector->hda;
580
581 DRM_DEBUG_DRIVER("\n");
582
583 for (i = 0; i < ARRAY_SIZE(hda_supported_modes); i++) {
584 struct drm_display_mode *mode =
585 drm_mode_duplicate(hda->drm_dev,
586 &hda_supported_modes[i].mode);
587 if (!mode)
588 continue;
589
590 /* the first mode is the preferred mode */
591 if (i == 0)
592 mode->type |= DRM_MODE_TYPE_PREFERRED;
593
594 drm_mode_probed_add(connector, mode);
595 count++;
596 }
597
598 return count;
599}
600
601#define CLK_TOLERANCE_HZ 50
602
603static int sti_hda_connector_mode_valid(struct drm_connector *connector,
604 struct drm_display_mode *mode)
605{
606 int target = mode->clock * 1000;
607 int target_min = target - CLK_TOLERANCE_HZ;
608 int target_max = target + CLK_TOLERANCE_HZ;
609 int result;
610 int idx;
611 struct sti_hda_connector *hda_connector
612 = to_sti_hda_connector(connector);
613 struct sti_hda *hda = hda_connector->hda;
614
615 if (!hda_get_mode_idx(*mode, &idx)) {
616 return MODE_BAD;
617 } else {
618 result = clk_round_rate(hda->clk_pix, target);
619
620 DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n",
621 target, result);
622
623 if ((result < target_min) || (result > target_max)) {
624 DRM_DEBUG_DRIVER("hda pixclk=%d not supported\n",
625 target);
626 return MODE_BAD;
627 }
628 }
629
630 return MODE_OK;
631}
632
633static const
634struct drm_connector_helper_funcs sti_hda_connector_helper_funcs = {
635 .get_modes = sti_hda_connector_get_modes,
636 .mode_valid = sti_hda_connector_mode_valid,
637};
638
639static int sti_hda_late_register(struct drm_connector *connector)
640{
641 struct sti_hda_connector *hda_connector
642 = to_sti_hda_connector(connector);
643 struct sti_hda *hda = hda_connector->hda;
644
645 hda_debugfs_init(hda, hda->drm_dev->primary);
646
647 return 0;
648}
649
650static const struct drm_connector_funcs sti_hda_connector_funcs = {
651 .fill_modes = drm_helper_probe_single_connector_modes,
652 .destroy = drm_connector_cleanup,
653 .reset = drm_atomic_helper_connector_reset,
654 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
655 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
656 .late_register = sti_hda_late_register,
657};
658
659static struct drm_encoder *sti_hda_find_encoder(struct drm_device *dev)
660{
661 struct drm_encoder *encoder;
662
663 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
664 if (encoder->encoder_type == DRM_MODE_ENCODER_DAC)
665 return encoder;
666 }
667
668 return NULL;
669}
670
671static int sti_hda_bind(struct device *dev, struct device *master, void *data)
672{
673 struct sti_hda *hda = dev_get_drvdata(dev);
674 struct drm_device *drm_dev = data;
675 struct drm_encoder *encoder;
676 struct sti_hda_connector *connector;
677 struct drm_connector *drm_connector;
678 struct drm_bridge *bridge;
679 int err;
680
681 /* Set the drm device handle */
682 hda->drm_dev = drm_dev;
683
684 encoder = sti_hda_find_encoder(drm_dev);
685 if (!encoder)
686 return -ENOMEM;
687
688 connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL);
689 if (!connector)
690 return -ENOMEM;
691
692 connector->hda = hda;
693
694 bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL);
695 if (!bridge)
696 return -ENOMEM;
697
698 bridge->driver_private = hda;
699 bridge->funcs = &sti_hda_bridge_funcs;
700 drm_bridge_attach(encoder, bridge, NULL, 0);
701
702 connector->encoder = encoder;
703
704 drm_connector = (struct drm_connector *)connector;
705
706 drm_connector->polled = DRM_CONNECTOR_POLL_HPD;
707
708 drm_connector_init(drm_dev, drm_connector,
709 &sti_hda_connector_funcs, DRM_MODE_CONNECTOR_Component);
710 drm_connector_helper_add(drm_connector,
711 &sti_hda_connector_helper_funcs);
712
713 err = drm_connector_attach_encoder(drm_connector, encoder);
714 if (err) {
715 DRM_ERROR("Failed to attach a connector to a encoder\n");
716 goto err_sysfs;
717 }
718
719 /* force to disable hd dacs at startup */
720 hda_enable_hd_dacs(hda, false);
721
722 return 0;
723
724err_sysfs:
725 return -EINVAL;
726}
727
728static void sti_hda_unbind(struct device *dev,
729 struct device *master, void *data)
730{
731}
732
733static const struct component_ops sti_hda_ops = {
734 .bind = sti_hda_bind,
735 .unbind = sti_hda_unbind,
736};
737
738static int sti_hda_probe(struct platform_device *pdev)
739{
740 struct device *dev = &pdev->dev;
741 struct sti_hda *hda;
742 struct resource *res;
743
744 DRM_INFO("%s\n", __func__);
745
746 hda = devm_kzalloc(dev, sizeof(*hda), GFP_KERNEL);
747 if (!hda)
748 return -ENOMEM;
749
750 hda->dev = pdev->dev;
751
752 /* Get resources */
753 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hda-reg");
754 if (!res) {
755 DRM_ERROR("Invalid hda resource\n");
756 return -ENOMEM;
757 }
758 hda->regs = devm_ioremap(dev, res->start, resource_size(res));
759 if (!hda->regs)
760 return -ENOMEM;
761
762 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
763 "video-dacs-ctrl");
764 if (res) {
765 hda->video_dacs_ctrl = devm_ioremap(dev, res->start,
766 resource_size(res));
767 if (!hda->video_dacs_ctrl)
768 return -ENOMEM;
769 } else {
770 /* If no existing video-dacs-ctrl resource continue the probe */
771 DRM_DEBUG_DRIVER("No video-dacs-ctrl resource\n");
772 hda->video_dacs_ctrl = NULL;
773 }
774
775 /* Get clock resources */
776 hda->clk_pix = devm_clk_get(dev, "pix");
777 if (IS_ERR(hda->clk_pix)) {
778 DRM_ERROR("Cannot get hda_pix clock\n");
779 return PTR_ERR(hda->clk_pix);
780 }
781
782 hda->clk_hddac = devm_clk_get(dev, "hddac");
783 if (IS_ERR(hda->clk_hddac)) {
784 DRM_ERROR("Cannot get hda_hddac clock\n");
785 return PTR_ERR(hda->clk_hddac);
786 }
787
788 platform_set_drvdata(pdev, hda);
789
790 return component_add(&pdev->dev, &sti_hda_ops);
791}
792
793static int sti_hda_remove(struct platform_device *pdev)
794{
795 component_del(&pdev->dev, &sti_hda_ops);
796 return 0;
797}
798
799static const struct of_device_id hda_of_match[] = {
800 { .compatible = "st,stih416-hda", },
801 { .compatible = "st,stih407-hda", },
802 { /* end node */ }
803};
804MODULE_DEVICE_TABLE(of, hda_of_match);
805
806struct platform_driver sti_hda_driver = {
807 .driver = {
808 .name = "sti-hda",
809 .owner = THIS_MODULE,
810 .of_match_table = hda_of_match,
811 },
812 .probe = sti_hda_probe,
813 .remove = sti_hda_remove,
814};
815
816MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
817MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
818MODULE_LICENSE("GPL");