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  * tvout_vip_set_color_order - 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  * tvout_vip_set_clip_mode - 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  * tvout_vip_set_rnd - 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  * tvout_vip_set_sel_input - 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  * tvout_vip_set_in_vid_fmt - 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  * tvout_preformatter_set_matrix - 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  * tvout_dvo_start - 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  * tvout_hdmi_start - 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  * tvout_hda_start - 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