1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) STMicroelectronics SA 2014
4 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
5 * Vincent Abriou <vincent.abriou@st.com>
6 * for STMicroelectronics.
7 */
8
9 #include <linux/clk.h>
10 #include <linux/component.h>
11 #include <linux/io.h>
12 #include <linux/module.h>
13 #include <linux/of_platform.h>
14 #include <linux/platform_device.h>
15 #include <linux/reset.h>
16 #include <linux/seq_file.h>
17
18 #include <drm/drm_atomic_helper.h>
19 #include <drm/drm_debugfs.h>
20 #include <drm/drm_device.h>
21 #include <drm/drm_file.h>
22 #include <drm/drm_print.h>
23
24 #include "sti_crtc.h"
25 #include "sti_drv.h"
26 #include "sti_vtg.h"
27
28 /* glue registers */
29 #define TVO_CSC_MAIN_M0 0x000
30 #define TVO_CSC_MAIN_M1 0x004
31 #define TVO_CSC_MAIN_M2 0x008
32 #define TVO_CSC_MAIN_M3 0x00c
33 #define TVO_CSC_MAIN_M4 0x010
34 #define TVO_CSC_MAIN_M5 0x014
35 #define TVO_CSC_MAIN_M6 0x018
36 #define TVO_CSC_MAIN_M7 0x01c
37 #define TVO_MAIN_IN_VID_FORMAT 0x030
38 #define TVO_CSC_AUX_M0 0x100
39 #define TVO_CSC_AUX_M1 0x104
40 #define TVO_CSC_AUX_M2 0x108
41 #define TVO_CSC_AUX_M3 0x10c
42 #define TVO_CSC_AUX_M4 0x110
43 #define TVO_CSC_AUX_M5 0x114
44 #define TVO_CSC_AUX_M6 0x118
45 #define TVO_CSC_AUX_M7 0x11c
46 #define TVO_AUX_IN_VID_FORMAT 0x130
47 #define TVO_VIP_HDF 0x400
48 #define TVO_HD_SYNC_SEL 0x418
49 #define TVO_HD_DAC_CFG_OFF 0x420
50 #define TVO_VIP_HDMI 0x500
51 #define TVO_HDMI_FORCE_COLOR_0 0x504
52 #define TVO_HDMI_FORCE_COLOR_1 0x508
53 #define TVO_HDMI_CLIP_VALUE_B_CB 0x50c
54 #define TVO_HDMI_CLIP_VALUE_Y_G 0x510
55 #define TVO_HDMI_CLIP_VALUE_R_CR 0x514
56 #define TVO_HDMI_SYNC_SEL 0x518
57 #define TVO_HDMI_DFV_OBS 0x540
58 #define TVO_VIP_DVO 0x600
59 #define TVO_DVO_SYNC_SEL 0x618
60 #define TVO_DVO_CONFIG 0x620
61
62 #define TVO_IN_FMT_SIGNED BIT(0)
63 #define TVO_SYNC_EXT BIT(4)
64
65 #define TVO_VIP_REORDER_R_SHIFT 24
66 #define TVO_VIP_REORDER_G_SHIFT 20
67 #define TVO_VIP_REORDER_B_SHIFT 16
68 #define TVO_VIP_REORDER_MASK 0x3
69 #define TVO_VIP_REORDER_Y_G_SEL 0
70 #define TVO_VIP_REORDER_CB_B_SEL 1
71 #define TVO_VIP_REORDER_CR_R_SEL 2
72
73 #define TVO_VIP_CLIP_SHIFT 8
74 #define TVO_VIP_CLIP_MASK 0x7
75 #define TVO_VIP_CLIP_DISABLED 0
76 #define TVO_VIP_CLIP_EAV_SAV 1
77 #define TVO_VIP_CLIP_LIMITED_RANGE_RGB_Y 2
78 #define TVO_VIP_CLIP_LIMITED_RANGE_CB_CR 3
79 #define TVO_VIP_CLIP_PROG_RANGE 4
80
81 #define TVO_VIP_RND_SHIFT 4
82 #define TVO_VIP_RND_MASK 0x3
83 #define TVO_VIP_RND_8BIT_ROUNDED 0
84 #define TVO_VIP_RND_10BIT_ROUNDED 1
85 #define TVO_VIP_RND_12BIT_ROUNDED 2
86
87 #define TVO_VIP_SEL_INPUT_MASK 0xf
88 #define TVO_VIP_SEL_INPUT_MAIN 0x0
89 #define TVO_VIP_SEL_INPUT_AUX 0x8
90 #define TVO_VIP_SEL_INPUT_FORCE_COLOR 0xf
91 #define TVO_VIP_SEL_INPUT_BYPASS_MASK 0x1
92 #define TVO_VIP_SEL_INPUT_BYPASSED 1
93
94 #define TVO_SYNC_MAIN_VTG_SET_REF 0x00
95 #define TVO_SYNC_AUX_VTG_SET_REF 0x10
96
97 #define TVO_SYNC_HD_DCS_SHIFT 8
98
99 #define TVO_SYNC_DVO_PAD_HSYNC_SHIFT 8
100 #define TVO_SYNC_DVO_PAD_VSYNC_SHIFT 16
101
102 #define ENCODER_CRTC_MASK (BIT(0) | BIT(1))
103
104 #define TVO_MIN_HD_HEIGHT 720
105
106 /* enum listing the supported output data format */
107 enum sti_tvout_video_out_type {
108 STI_TVOUT_VIDEO_OUT_RGB,
109 STI_TVOUT_VIDEO_OUT_YUV,
110 };
111
112 struct sti_tvout {
113 struct device *dev;
114 struct drm_device *drm_dev;
115 void __iomem *regs;
116 struct reset_control *reset;
117 struct drm_encoder *hdmi;
118 struct drm_encoder *hda;
119 struct drm_encoder *dvo;
120 bool debugfs_registered;
121 };
122
123 struct sti_tvout_encoder {
124 struct drm_encoder encoder;
125 struct sti_tvout *tvout;
126 };
127
128 #define to_sti_tvout_encoder(x) \
129 container_of(x, struct sti_tvout_encoder, encoder)
130
131 #define to_sti_tvout(x) to_sti_tvout_encoder(x)->tvout
132
133 /* preformatter conversion matrix */
134 static const u32 rgb_to_ycbcr_601[8] = {
135 0xF927082E, 0x04C9FEAB, 0x01D30964, 0xFA95FD3D,
136 0x0000082E, 0x00002000, 0x00002000, 0x00000000
137 };
138
139 /* 709 RGB to YCbCr */
140 static const u32 rgb_to_ycbcr_709[8] = {
141 0xF891082F, 0x0367FF40, 0x01280B71, 0xF9B1FE20,
142 0x0000082F, 0x00002000, 0x00002000, 0x00000000
143 };
144
tvout_read(struct sti_tvout * tvout,int offset)145 static u32 tvout_read(struct sti_tvout *tvout, int offset)
146 {
147 return readl(tvout->regs + offset);
148 }
149
tvout_write(struct sti_tvout * tvout,u32 val,int offset)150 static void tvout_write(struct sti_tvout *tvout, u32 val, int offset)
151 {
152 writel(val, tvout->regs + offset);
153 }
154
155 /**
156 * Set the clipping mode of a VIP
157 *
158 * @tvout: tvout structure
159 * @reg: register to set
160 * @cr_r: red chroma or red order
161 * @y_g: y or green order
162 * @cb_b: blue chroma or blue order
163 */
tvout_vip_set_color_order(struct sti_tvout * tvout,int reg,u32 cr_r,u32 y_g,u32 cb_b)164 static void tvout_vip_set_color_order(struct sti_tvout *tvout, int reg,
165 u32 cr_r, u32 y_g, u32 cb_b)
166 {
167 u32 val = tvout_read(tvout, reg);
168
169 val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_R_SHIFT);
170 val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_G_SHIFT);
171 val &= ~(TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_B_SHIFT);
172 val |= cr_r << TVO_VIP_REORDER_R_SHIFT;
173 val |= y_g << TVO_VIP_REORDER_G_SHIFT;
174 val |= cb_b << TVO_VIP_REORDER_B_SHIFT;
175
176 tvout_write(tvout, val, reg);
177 }
178
179 /**
180 * Set the clipping mode of a VIP
181 *
182 * @tvout: tvout structure
183 * @reg: register to set
184 * @range: clipping range
185 */
tvout_vip_set_clip_mode(struct sti_tvout * tvout,int reg,u32 range)186 static void tvout_vip_set_clip_mode(struct sti_tvout *tvout, int reg, u32 range)
187 {
188 u32 val = tvout_read(tvout, reg);
189
190 val &= ~(TVO_VIP_CLIP_MASK << TVO_VIP_CLIP_SHIFT);
191 val |= range << TVO_VIP_CLIP_SHIFT;
192 tvout_write(tvout, val, reg);
193 }
194
195 /**
196 * Set the rounded value of a VIP
197 *
198 * @tvout: tvout structure
199 * @reg: register to set
200 * @rnd: rounded val per component
201 */
tvout_vip_set_rnd(struct sti_tvout * tvout,int reg,u32 rnd)202 static void tvout_vip_set_rnd(struct sti_tvout *tvout, int reg, u32 rnd)
203 {
204 u32 val = tvout_read(tvout, reg);
205
206 val &= ~(TVO_VIP_RND_MASK << TVO_VIP_RND_SHIFT);
207 val |= rnd << TVO_VIP_RND_SHIFT;
208 tvout_write(tvout, val, reg);
209 }
210
211 /**
212 * Select the VIP input
213 *
214 * @tvout: tvout structure
215 * @reg: register to set
216 * @main_path: main or auxiliary path
217 * @video_out: selected_input (main/aux + conv)
218 */
tvout_vip_set_sel_input(struct sti_tvout * tvout,int reg,bool main_path,enum sti_tvout_video_out_type video_out)219 static void tvout_vip_set_sel_input(struct sti_tvout *tvout,
220 int reg,
221 bool main_path,
222 enum sti_tvout_video_out_type video_out)
223 {
224 u32 sel_input;
225 u32 val = tvout_read(tvout, reg);
226
227 if (main_path)
228 sel_input = TVO_VIP_SEL_INPUT_MAIN;
229 else
230 sel_input = TVO_VIP_SEL_INPUT_AUX;
231
232 switch (video_out) {
233 case STI_TVOUT_VIDEO_OUT_RGB:
234 sel_input |= TVO_VIP_SEL_INPUT_BYPASSED;
235 break;
236 case STI_TVOUT_VIDEO_OUT_YUV:
237 sel_input &= ~TVO_VIP_SEL_INPUT_BYPASSED;
238 break;
239 }
240
241 /* on stih407 chip the sel_input bypass mode logic is inverted */
242 sel_input = sel_input ^ TVO_VIP_SEL_INPUT_BYPASS_MASK;
243
244 val &= ~TVO_VIP_SEL_INPUT_MASK;
245 val |= sel_input;
246 tvout_write(tvout, val, reg);
247 }
248
249 /**
250 * Select the input video signed or unsigned
251 *
252 * @tvout: tvout structure
253 * @reg: register to set
254 * @in_vid_fmt: used video input format
255 */
tvout_vip_set_in_vid_fmt(struct sti_tvout * tvout,int reg,u32 in_vid_fmt)256 static void tvout_vip_set_in_vid_fmt(struct sti_tvout *tvout,
257 int reg, u32 in_vid_fmt)
258 {
259 u32 val = tvout_read(tvout, reg);
260
261 val &= ~TVO_IN_FMT_SIGNED;
262 val |= in_vid_fmt;
263 tvout_write(tvout, val, reg);
264 }
265
266 /**
267 * Set preformatter matrix
268 *
269 * @tvout: tvout structure
270 * @mode: display mode structure
271 */
tvout_preformatter_set_matrix(struct sti_tvout * tvout,struct drm_display_mode * mode)272 static void tvout_preformatter_set_matrix(struct sti_tvout *tvout,
273 struct drm_display_mode *mode)
274 {
275 unsigned int i;
276 const u32 *pf_matrix;
277
278 if (mode->vdisplay >= TVO_MIN_HD_HEIGHT)
279 pf_matrix = rgb_to_ycbcr_709;
280 else
281 pf_matrix = rgb_to_ycbcr_601;
282
283 for (i = 0; i < 8; i++) {
284 tvout_write(tvout, *(pf_matrix + i),
285 TVO_CSC_MAIN_M0 + (i * 4));
286 tvout_write(tvout, *(pf_matrix + i),
287 TVO_CSC_AUX_M0 + (i * 4));
288 }
289 }
290
291 /**
292 * Start VIP block for DVO output
293 *
294 * @tvout: pointer on tvout structure
295 * @main_path: true if main path has to be used in the vip configuration
296 * else aux path is used.
297 */
tvout_dvo_start(struct sti_tvout * tvout,bool main_path)298 static void tvout_dvo_start(struct sti_tvout *tvout, bool main_path)
299 {
300 u32 tvo_in_vid_format;
301 int val, tmp;
302
303 dev_dbg(tvout->dev, "%s\n", __func__);
304
305 if (main_path) {
306 DRM_DEBUG_DRIVER("main vip for DVO\n");
307 /* Select the input sync for dvo */
308 tmp = TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_DVO;
309 val = tmp << TVO_SYNC_DVO_PAD_VSYNC_SHIFT;
310 val |= tmp << TVO_SYNC_DVO_PAD_HSYNC_SHIFT;
311 val |= tmp;
312 tvout_write(tvout, val, TVO_DVO_SYNC_SEL);
313 tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
314 } else {
315 DRM_DEBUG_DRIVER("aux vip for DVO\n");
316 /* Select the input sync for dvo */
317 tmp = TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_DVO;
318 val = tmp << TVO_SYNC_DVO_PAD_VSYNC_SHIFT;
319 val |= tmp << TVO_SYNC_DVO_PAD_HSYNC_SHIFT;
320 val |= tmp;
321 tvout_write(tvout, val, TVO_DVO_SYNC_SEL);
322 tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
323 }
324
325 /* Set color channel order */
326 tvout_vip_set_color_order(tvout, TVO_VIP_DVO,
327 TVO_VIP_REORDER_CR_R_SEL,
328 TVO_VIP_REORDER_Y_G_SEL,
329 TVO_VIP_REORDER_CB_B_SEL);
330
331 /* Set clipping mode */
332 tvout_vip_set_clip_mode(tvout, TVO_VIP_DVO, TVO_VIP_CLIP_DISABLED);
333
334 /* Set round mode (rounded to 8-bit per component) */
335 tvout_vip_set_rnd(tvout, TVO_VIP_DVO, TVO_VIP_RND_8BIT_ROUNDED);
336
337 /* Set input video format */
338 tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);
339
340 /* Input selection */
341 tvout_vip_set_sel_input(tvout, TVO_VIP_DVO, main_path,
342 STI_TVOUT_VIDEO_OUT_RGB);
343 }
344
345 /**
346 * Start VIP block for HDMI output
347 *
348 * @tvout: pointer on tvout structure
349 * @main_path: true if main path has to be used in the vip configuration
350 * else aux path is used.
351 */
tvout_hdmi_start(struct sti_tvout * tvout,bool main_path)352 static void tvout_hdmi_start(struct sti_tvout *tvout, bool main_path)
353 {
354 u32 tvo_in_vid_format;
355
356 dev_dbg(tvout->dev, "%s\n", __func__);
357
358 if (main_path) {
359 DRM_DEBUG_DRIVER("main vip for hdmi\n");
360 /* select the input sync for hdmi */
361 tvout_write(tvout,
362 TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDMI,
363 TVO_HDMI_SYNC_SEL);
364 tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
365 } else {
366 DRM_DEBUG_DRIVER("aux vip for hdmi\n");
367 /* select the input sync for hdmi */
368 tvout_write(tvout,
369 TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDMI,
370 TVO_HDMI_SYNC_SEL);
371 tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
372 }
373
374 /* set color channel order */
375 tvout_vip_set_color_order(tvout, TVO_VIP_HDMI,
376 TVO_VIP_REORDER_CR_R_SEL,
377 TVO_VIP_REORDER_Y_G_SEL,
378 TVO_VIP_REORDER_CB_B_SEL);
379
380 /* set clipping mode */
381 tvout_vip_set_clip_mode(tvout, TVO_VIP_HDMI, TVO_VIP_CLIP_DISABLED);
382
383 /* set round mode (rounded to 8-bit per component) */
384 tvout_vip_set_rnd(tvout, TVO_VIP_HDMI, TVO_VIP_RND_8BIT_ROUNDED);
385
386 /* set input video format */
387 tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);
388
389 /* input selection */
390 tvout_vip_set_sel_input(tvout, TVO_VIP_HDMI, main_path,
391 STI_TVOUT_VIDEO_OUT_RGB);
392 }
393
394 /**
395 * Start HDF VIP and HD DAC
396 *
397 * @tvout: pointer on tvout structure
398 * @main_path: true if main path has to be used in the vip configuration
399 * else aux path is used.
400 */
tvout_hda_start(struct sti_tvout * tvout,bool main_path)401 static void tvout_hda_start(struct sti_tvout *tvout, bool main_path)
402 {
403 u32 tvo_in_vid_format;
404 int val;
405
406 dev_dbg(tvout->dev, "%s\n", __func__);
407
408 if (main_path) {
409 DRM_DEBUG_DRIVER("main vip for HDF\n");
410 /* Select the input sync for HD analog and HD DCS */
411 val = TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDDCS;
412 val = val << TVO_SYNC_HD_DCS_SHIFT;
413 val |= TVO_SYNC_MAIN_VTG_SET_REF | VTG_SYNC_ID_HDF;
414 tvout_write(tvout, val, TVO_HD_SYNC_SEL);
415 tvo_in_vid_format = TVO_MAIN_IN_VID_FORMAT;
416 } else {
417 DRM_DEBUG_DRIVER("aux vip for HDF\n");
418 /* Select the input sync for HD analog and HD DCS */
419 val = TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDDCS;
420 val = val << TVO_SYNC_HD_DCS_SHIFT;
421 val |= TVO_SYNC_AUX_VTG_SET_REF | VTG_SYNC_ID_HDF;
422 tvout_write(tvout, val, TVO_HD_SYNC_SEL);
423 tvo_in_vid_format = TVO_AUX_IN_VID_FORMAT;
424 }
425
426 /* set color channel order */
427 tvout_vip_set_color_order(tvout, TVO_VIP_HDF,
428 TVO_VIP_REORDER_CR_R_SEL,
429 TVO_VIP_REORDER_Y_G_SEL,
430 TVO_VIP_REORDER_CB_B_SEL);
431
432 /* set clipping mode */
433 tvout_vip_set_clip_mode(tvout, TVO_VIP_HDF, TVO_VIP_CLIP_DISABLED);
434
435 /* set round mode (rounded to 10-bit per component) */
436 tvout_vip_set_rnd(tvout, TVO_VIP_HDF, TVO_VIP_RND_10BIT_ROUNDED);
437
438 /* Set input video format */
439 tvout_vip_set_in_vid_fmt(tvout, tvo_in_vid_format, TVO_IN_FMT_SIGNED);
440
441 /* Input selection */
442 tvout_vip_set_sel_input(tvout, TVO_VIP_HDF, main_path,
443 STI_TVOUT_VIDEO_OUT_YUV);
444
445 /* power up HD DAC */
446 tvout_write(tvout, 0, TVO_HD_DAC_CFG_OFF);
447 }
448
449 #define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \
450 readl(tvout->regs + reg))
451
tvout_dbg_vip(struct seq_file * s,int val)452 static void tvout_dbg_vip(struct seq_file *s, int val)
453 {
454 int r, g, b, tmp, mask;
455 char *const reorder[] = {"Y_G", "Cb_B", "Cr_R"};
456 char *const clipping[] = {"No", "EAV/SAV", "Limited range RGB/Y",
457 "Limited range Cb/Cr", "decided by register"};
458 char *const round[] = {"8-bit", "10-bit", "12-bit"};
459 char *const input_sel[] = {"Main (color matrix enabled)",
460 "Main (color matrix by-passed)",
461 "", "", "", "", "", "",
462 "Aux (color matrix enabled)",
463 "Aux (color matrix by-passed)",
464 "", "", "", "", "", "Force value"};
465
466 seq_putc(s, '\t');
467 mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_R_SHIFT;
468 r = (val & mask) >> TVO_VIP_REORDER_R_SHIFT;
469 mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_G_SHIFT;
470 g = (val & mask) >> TVO_VIP_REORDER_G_SHIFT;
471 mask = TVO_VIP_REORDER_MASK << TVO_VIP_REORDER_B_SHIFT;
472 b = (val & mask) >> TVO_VIP_REORDER_B_SHIFT;
473 seq_printf(s, "%-24s %s->%s %s->%s %s->%s\n", "Reorder:",
474 reorder[r], reorder[TVO_VIP_REORDER_CR_R_SEL],
475 reorder[g], reorder[TVO_VIP_REORDER_Y_G_SEL],
476 reorder[b], reorder[TVO_VIP_REORDER_CB_B_SEL]);
477 seq_puts(s, "\t\t\t\t\t");
478 mask = TVO_VIP_CLIP_MASK << TVO_VIP_CLIP_SHIFT;
479 tmp = (val & mask) >> TVO_VIP_CLIP_SHIFT;
480 seq_printf(s, "%-24s %s\n", "Clipping:", clipping[tmp]);
481 seq_puts(s, "\t\t\t\t\t");
482 mask = TVO_VIP_RND_MASK << TVO_VIP_RND_SHIFT;
483 tmp = (val & mask) >> TVO_VIP_RND_SHIFT;
484 seq_printf(s, "%-24s input data rounded to %s per component\n",
485 "Round:", round[tmp]);
486 seq_puts(s, "\t\t\t\t\t");
487 tmp = (val & TVO_VIP_SEL_INPUT_MASK);
488 seq_printf(s, "%-24s %s", "Input selection:", input_sel[tmp]);
489 }
490
tvout_dbg_hd_dac_cfg(struct seq_file * s,int val)491 static void tvout_dbg_hd_dac_cfg(struct seq_file *s, int val)
492 {
493 seq_printf(s, "\t%-24s %s", "HD DAC:",
494 val & 1 ? "disabled" : "enabled");
495 }
496
tvout_dbg_show(struct seq_file * s,void * data)497 static int tvout_dbg_show(struct seq_file *s, void *data)
498 {
499 struct drm_info_node *node = s->private;
500 struct sti_tvout *tvout = (struct sti_tvout *)node->info_ent->data;
501 struct drm_crtc *crtc;
502
503 seq_printf(s, "TVOUT: (vaddr = 0x%p)", tvout->regs);
504
505 seq_puts(s, "\n\n HDMI encoder: ");
506 crtc = tvout->hdmi->crtc;
507 if (crtc) {
508 seq_printf(s, "connected to %s path",
509 sti_crtc_is_main(crtc) ? "main" : "aux");
510 DBGFS_DUMP(TVO_HDMI_SYNC_SEL);
511 DBGFS_DUMP(TVO_VIP_HDMI);
512 tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_HDMI));
513 } else {
514 seq_puts(s, "disabled");
515 }
516
517 seq_puts(s, "\n\n DVO encoder: ");
518 crtc = tvout->dvo->crtc;
519 if (crtc) {
520 seq_printf(s, "connected to %s path",
521 sti_crtc_is_main(crtc) ? "main" : "aux");
522 DBGFS_DUMP(TVO_DVO_SYNC_SEL);
523 DBGFS_DUMP(TVO_DVO_CONFIG);
524 DBGFS_DUMP(TVO_VIP_DVO);
525 tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_DVO));
526 } else {
527 seq_puts(s, "disabled");
528 }
529
530 seq_puts(s, "\n\n HDA encoder: ");
531 crtc = tvout->hda->crtc;
532 if (crtc) {
533 seq_printf(s, "connected to %s path",
534 sti_crtc_is_main(crtc) ? "main" : "aux");
535 DBGFS_DUMP(TVO_HD_SYNC_SEL);
536 DBGFS_DUMP(TVO_HD_DAC_CFG_OFF);
537 tvout_dbg_hd_dac_cfg(s,
538 readl(tvout->regs + TVO_HD_DAC_CFG_OFF));
539 DBGFS_DUMP(TVO_VIP_HDF);
540 tvout_dbg_vip(s, readl(tvout->regs + TVO_VIP_HDF));
541 } else {
542 seq_puts(s, "disabled");
543 }
544
545 seq_puts(s, "\n\n main path configuration");
546 DBGFS_DUMP(TVO_CSC_MAIN_M0);
547 DBGFS_DUMP(TVO_CSC_MAIN_M1);
548 DBGFS_DUMP(TVO_CSC_MAIN_M2);
549 DBGFS_DUMP(TVO_CSC_MAIN_M3);
550 DBGFS_DUMP(TVO_CSC_MAIN_M4);
551 DBGFS_DUMP(TVO_CSC_MAIN_M5);
552 DBGFS_DUMP(TVO_CSC_MAIN_M6);
553 DBGFS_DUMP(TVO_CSC_MAIN_M7);
554 DBGFS_DUMP(TVO_MAIN_IN_VID_FORMAT);
555
556 seq_puts(s, "\n\n auxiliary path configuration");
557 DBGFS_DUMP(TVO_CSC_AUX_M0);
558 DBGFS_DUMP(TVO_CSC_AUX_M2);
559 DBGFS_DUMP(TVO_CSC_AUX_M3);
560 DBGFS_DUMP(TVO_CSC_AUX_M4);
561 DBGFS_DUMP(TVO_CSC_AUX_M5);
562 DBGFS_DUMP(TVO_CSC_AUX_M6);
563 DBGFS_DUMP(TVO_CSC_AUX_M7);
564 DBGFS_DUMP(TVO_AUX_IN_VID_FORMAT);
565 seq_putc(s, '\n');
566 return 0;
567 }
568
569 static struct drm_info_list tvout_debugfs_files[] = {
570 { "tvout", tvout_dbg_show, 0, NULL },
571 };
572
tvout_debugfs_init(struct sti_tvout * tvout,struct drm_minor * minor)573 static void tvout_debugfs_init(struct sti_tvout *tvout, struct drm_minor *minor)
574 {
575 unsigned int i;
576
577 for (i = 0; i < ARRAY_SIZE(tvout_debugfs_files); i++)
578 tvout_debugfs_files[i].data = tvout;
579
580 drm_debugfs_create_files(tvout_debugfs_files,
581 ARRAY_SIZE(tvout_debugfs_files),
582 minor->debugfs_root, minor);
583 }
584
sti_tvout_encoder_dpms(struct drm_encoder * encoder,int mode)585 static void sti_tvout_encoder_dpms(struct drm_encoder *encoder, int mode)
586 {
587 }
588
sti_tvout_encoder_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)589 static void sti_tvout_encoder_mode_set(struct drm_encoder *encoder,
590 struct drm_display_mode *mode,
591 struct drm_display_mode *adjusted_mode)
592 {
593 }
594
sti_tvout_encoder_destroy(struct drm_encoder * encoder)595 static void sti_tvout_encoder_destroy(struct drm_encoder *encoder)
596 {
597 struct sti_tvout_encoder *sti_encoder = to_sti_tvout_encoder(encoder);
598
599 drm_encoder_cleanup(encoder);
600 kfree(sti_encoder);
601 }
602
sti_tvout_late_register(struct drm_encoder * encoder)603 static int sti_tvout_late_register(struct drm_encoder *encoder)
604 {
605 struct sti_tvout *tvout = to_sti_tvout(encoder);
606
607 if (tvout->debugfs_registered)
608 return 0;
609
610 tvout_debugfs_init(tvout, encoder->dev->primary);
611
612 tvout->debugfs_registered = true;
613 return 0;
614 }
615
sti_tvout_early_unregister(struct drm_encoder * encoder)616 static void sti_tvout_early_unregister(struct drm_encoder *encoder)
617 {
618 struct sti_tvout *tvout = to_sti_tvout(encoder);
619
620 if (!tvout->debugfs_registered)
621 return;
622
623 tvout->debugfs_registered = false;
624 }
625
626 static const struct drm_encoder_funcs sti_tvout_encoder_funcs = {
627 .destroy = sti_tvout_encoder_destroy,
628 .late_register = sti_tvout_late_register,
629 .early_unregister = sti_tvout_early_unregister,
630 };
631
sti_dvo_encoder_enable(struct drm_encoder * encoder)632 static void sti_dvo_encoder_enable(struct drm_encoder *encoder)
633 {
634 struct sti_tvout *tvout = to_sti_tvout(encoder);
635
636 tvout_preformatter_set_matrix(tvout, &encoder->crtc->mode);
637
638 tvout_dvo_start(tvout, sti_crtc_is_main(encoder->crtc));
639 }
640
sti_dvo_encoder_disable(struct drm_encoder * encoder)641 static void sti_dvo_encoder_disable(struct drm_encoder *encoder)
642 {
643 struct sti_tvout *tvout = to_sti_tvout(encoder);
644
645 /* Reset VIP register */
646 tvout_write(tvout, 0x0, TVO_VIP_DVO);
647 }
648
649 static const struct drm_encoder_helper_funcs sti_dvo_encoder_helper_funcs = {
650 .dpms = sti_tvout_encoder_dpms,
651 .mode_set = sti_tvout_encoder_mode_set,
652 .enable = sti_dvo_encoder_enable,
653 .disable = sti_dvo_encoder_disable,
654 };
655
656 static struct drm_encoder *
sti_tvout_create_dvo_encoder(struct drm_device * dev,struct sti_tvout * tvout)657 sti_tvout_create_dvo_encoder(struct drm_device *dev,
658 struct sti_tvout *tvout)
659 {
660 struct sti_tvout_encoder *encoder;
661 struct drm_encoder *drm_encoder;
662
663 encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
664 if (!encoder)
665 return NULL;
666
667 encoder->tvout = tvout;
668
669 drm_encoder = &encoder->encoder;
670
671 drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;
672
673 drm_encoder_init(dev, drm_encoder,
674 &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_LVDS,
675 NULL);
676
677 drm_encoder_helper_add(drm_encoder, &sti_dvo_encoder_helper_funcs);
678
679 return drm_encoder;
680 }
681
sti_hda_encoder_enable(struct drm_encoder * encoder)682 static void sti_hda_encoder_enable(struct drm_encoder *encoder)
683 {
684 struct sti_tvout *tvout = to_sti_tvout(encoder);
685
686 tvout_preformatter_set_matrix(tvout, &encoder->crtc->mode);
687
688 tvout_hda_start(tvout, sti_crtc_is_main(encoder->crtc));
689 }
690
sti_hda_encoder_disable(struct drm_encoder * encoder)691 static void sti_hda_encoder_disable(struct drm_encoder *encoder)
692 {
693 struct sti_tvout *tvout = to_sti_tvout(encoder);
694
695 /* reset VIP register */
696 tvout_write(tvout, 0x0, TVO_VIP_HDF);
697
698 /* power down HD DAC */
699 tvout_write(tvout, 1, TVO_HD_DAC_CFG_OFF);
700 }
701
702 static const struct drm_encoder_helper_funcs sti_hda_encoder_helper_funcs = {
703 .dpms = sti_tvout_encoder_dpms,
704 .mode_set = sti_tvout_encoder_mode_set,
705 .commit = sti_hda_encoder_enable,
706 .disable = sti_hda_encoder_disable,
707 };
708
sti_tvout_create_hda_encoder(struct drm_device * dev,struct sti_tvout * tvout)709 static struct drm_encoder *sti_tvout_create_hda_encoder(struct drm_device *dev,
710 struct sti_tvout *tvout)
711 {
712 struct sti_tvout_encoder *encoder;
713 struct drm_encoder *drm_encoder;
714
715 encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
716 if (!encoder)
717 return NULL;
718
719 encoder->tvout = tvout;
720
721 drm_encoder = &encoder->encoder;
722
723 drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;
724
725 drm_encoder_init(dev, drm_encoder,
726 &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_DAC, NULL);
727
728 drm_encoder_helper_add(drm_encoder, &sti_hda_encoder_helper_funcs);
729
730 return drm_encoder;
731 }
732
sti_hdmi_encoder_enable(struct drm_encoder * encoder)733 static void sti_hdmi_encoder_enable(struct drm_encoder *encoder)
734 {
735 struct sti_tvout *tvout = to_sti_tvout(encoder);
736
737 tvout_preformatter_set_matrix(tvout, &encoder->crtc->mode);
738
739 tvout_hdmi_start(tvout, sti_crtc_is_main(encoder->crtc));
740 }
741
sti_hdmi_encoder_disable(struct drm_encoder * encoder)742 static void sti_hdmi_encoder_disable(struct drm_encoder *encoder)
743 {
744 struct sti_tvout *tvout = to_sti_tvout(encoder);
745
746 /* reset VIP register */
747 tvout_write(tvout, 0x0, TVO_VIP_HDMI);
748 }
749
750 static const struct drm_encoder_helper_funcs sti_hdmi_encoder_helper_funcs = {
751 .dpms = sti_tvout_encoder_dpms,
752 .mode_set = sti_tvout_encoder_mode_set,
753 .commit = sti_hdmi_encoder_enable,
754 .disable = sti_hdmi_encoder_disable,
755 };
756
sti_tvout_create_hdmi_encoder(struct drm_device * dev,struct sti_tvout * tvout)757 static struct drm_encoder *sti_tvout_create_hdmi_encoder(struct drm_device *dev,
758 struct sti_tvout *tvout)
759 {
760 struct sti_tvout_encoder *encoder;
761 struct drm_encoder *drm_encoder;
762
763 encoder = devm_kzalloc(tvout->dev, sizeof(*encoder), GFP_KERNEL);
764 if (!encoder)
765 return NULL;
766
767 encoder->tvout = tvout;
768
769 drm_encoder = &encoder->encoder;
770
771 drm_encoder->possible_crtcs = ENCODER_CRTC_MASK;
772
773 drm_encoder_init(dev, drm_encoder,
774 &sti_tvout_encoder_funcs, DRM_MODE_ENCODER_TMDS, NULL);
775
776 drm_encoder_helper_add(drm_encoder, &sti_hdmi_encoder_helper_funcs);
777
778 return drm_encoder;
779 }
780
sti_tvout_create_encoders(struct drm_device * dev,struct sti_tvout * tvout)781 static void sti_tvout_create_encoders(struct drm_device *dev,
782 struct sti_tvout *tvout)
783 {
784 tvout->hdmi = sti_tvout_create_hdmi_encoder(dev, tvout);
785 tvout->hda = sti_tvout_create_hda_encoder(dev, tvout);
786 tvout->dvo = sti_tvout_create_dvo_encoder(dev, tvout);
787
788 tvout->hdmi->possible_clones = drm_encoder_mask(tvout->hdmi) |
789 drm_encoder_mask(tvout->hda) | drm_encoder_mask(tvout->dvo);
790 tvout->hda->possible_clones = drm_encoder_mask(tvout->hdmi) |
791 drm_encoder_mask(tvout->hda) | drm_encoder_mask(tvout->dvo);
792 tvout->dvo->possible_clones = drm_encoder_mask(tvout->hdmi) |
793 drm_encoder_mask(tvout->hda) | drm_encoder_mask(tvout->dvo);
794 }
795
sti_tvout_destroy_encoders(struct sti_tvout * tvout)796 static void sti_tvout_destroy_encoders(struct sti_tvout *tvout)
797 {
798 if (tvout->hdmi)
799 drm_encoder_cleanup(tvout->hdmi);
800 tvout->hdmi = NULL;
801
802 if (tvout->hda)
803 drm_encoder_cleanup(tvout->hda);
804 tvout->hda = NULL;
805
806 if (tvout->dvo)
807 drm_encoder_cleanup(tvout->dvo);
808 tvout->dvo = NULL;
809 }
810
sti_tvout_bind(struct device * dev,struct device * master,void * data)811 static int sti_tvout_bind(struct device *dev, struct device *master, void *data)
812 {
813 struct sti_tvout *tvout = dev_get_drvdata(dev);
814 struct drm_device *drm_dev = data;
815
816 tvout->drm_dev = drm_dev;
817
818 sti_tvout_create_encoders(drm_dev, tvout);
819
820 return 0;
821 }
822
sti_tvout_unbind(struct device * dev,struct device * master,void * data)823 static void sti_tvout_unbind(struct device *dev, struct device *master,
824 void *data)
825 {
826 struct sti_tvout *tvout = dev_get_drvdata(dev);
827
828 sti_tvout_destroy_encoders(tvout);
829 }
830
831 static const struct component_ops sti_tvout_ops = {
832 .bind = sti_tvout_bind,
833 .unbind = sti_tvout_unbind,
834 };
835
sti_tvout_probe(struct platform_device * pdev)836 static int sti_tvout_probe(struct platform_device *pdev)
837 {
838 struct device *dev = &pdev->dev;
839 struct device_node *node = dev->of_node;
840 struct sti_tvout *tvout;
841 struct resource *res;
842
843 DRM_INFO("%s\n", __func__);
844
845 if (!node)
846 return -ENODEV;
847
848 tvout = devm_kzalloc(dev, sizeof(*tvout), GFP_KERNEL);
849 if (!tvout)
850 return -ENOMEM;
851
852 tvout->dev = dev;
853
854 /* get memory resources */
855 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tvout-reg");
856 if (!res) {
857 DRM_ERROR("Invalid glue resource\n");
858 return -ENOMEM;
859 }
860 tvout->regs = devm_ioremap(dev, res->start, resource_size(res));
861 if (!tvout->regs)
862 return -ENOMEM;
863
864 /* get reset resources */
865 tvout->reset = devm_reset_control_get(dev, "tvout");
866 /* take tvout out of reset */
867 if (!IS_ERR(tvout->reset))
868 reset_control_deassert(tvout->reset);
869
870 platform_set_drvdata(pdev, tvout);
871
872 return component_add(dev, &sti_tvout_ops);
873 }
874
sti_tvout_remove(struct platform_device * pdev)875 static int sti_tvout_remove(struct platform_device *pdev)
876 {
877 component_del(&pdev->dev, &sti_tvout_ops);
878 return 0;
879 }
880
881 static const struct of_device_id tvout_of_match[] = {
882 { .compatible = "st,stih407-tvout", },
883 { /* end node */ }
884 };
885 MODULE_DEVICE_TABLE(of, tvout_of_match);
886
887 struct platform_driver sti_tvout_driver = {
888 .driver = {
889 .name = "sti-tvout",
890 .owner = THIS_MODULE,
891 .of_match_table = tvout_of_match,
892 },
893 .probe = sti_tvout_probe,
894 .remove = sti_tvout_remove,
895 };
896
897 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
898 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
899 MODULE_LICENSE("GPL");
900