1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) STMicroelectronics SA 2014
4 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
5 * Fabien Dessenne <fabien.dessenne@st.com>
6 * for STMicroelectronics.
7 */
8
9 #include <linux/moduleparam.h>
10 #include <linux/seq_file.h>
11
12 #include <drm/drm_print.h>
13
14 #include "sti_compositor.h"
15 #include "sti_mixer.h"
16 #include "sti_vtg.h"
17
18 /* Module parameter to set the background color of the mixer */
19 static unsigned int bkg_color = 0x000000;
20 MODULE_PARM_DESC(bkgcolor, "Value of the background color 0xRRGGBB");
21 module_param_named(bkgcolor, bkg_color, int, 0644);
22
23 /* regs offset */
24 #define GAM_MIXER_CTL 0x00
25 #define GAM_MIXER_BKC 0x04
26 #define GAM_MIXER_BCO 0x0C
27 #define GAM_MIXER_BCS 0x10
28 #define GAM_MIXER_AVO 0x28
29 #define GAM_MIXER_AVS 0x2C
30 #define GAM_MIXER_CRB 0x34
31 #define GAM_MIXER_ACT 0x38
32 #define GAM_MIXER_MBP 0x3C
33 #define GAM_MIXER_MX0 0x80
34
35 /* id for depth of CRB reg */
36 #define GAM_DEPTH_VID0_ID 1
37 #define GAM_DEPTH_VID1_ID 2
38 #define GAM_DEPTH_GDP0_ID 3
39 #define GAM_DEPTH_GDP1_ID 4
40 #define GAM_DEPTH_GDP2_ID 5
41 #define GAM_DEPTH_GDP3_ID 6
42 #define GAM_DEPTH_MASK_ID 7
43
44 /* mask in CTL reg */
45 #define GAM_CTL_BACK_MASK BIT(0)
46 #define GAM_CTL_VID0_MASK BIT(1)
47 #define GAM_CTL_VID1_MASK BIT(2)
48 #define GAM_CTL_GDP0_MASK BIT(3)
49 #define GAM_CTL_GDP1_MASK BIT(4)
50 #define GAM_CTL_GDP2_MASK BIT(5)
51 #define GAM_CTL_GDP3_MASK BIT(6)
52 #define GAM_CTL_CURSOR_MASK BIT(9)
53
sti_mixer_to_str(struct sti_mixer * mixer)54 const char *sti_mixer_to_str(struct sti_mixer *mixer)
55 {
56 switch (mixer->id) {
57 case STI_MIXER_MAIN:
58 return "MAIN_MIXER";
59 case STI_MIXER_AUX:
60 return "AUX_MIXER";
61 default:
62 return "<UNKNOWN MIXER>";
63 }
64 }
65
sti_mixer_reg_read(struct sti_mixer * mixer,u32 reg_id)66 static inline u32 sti_mixer_reg_read(struct sti_mixer *mixer, u32 reg_id)
67 {
68 return readl(mixer->regs + reg_id);
69 }
70
sti_mixer_reg_write(struct sti_mixer * mixer,u32 reg_id,u32 val)71 static inline void sti_mixer_reg_write(struct sti_mixer *mixer,
72 u32 reg_id, u32 val)
73 {
74 writel(val, mixer->regs + reg_id);
75 }
76
77 #define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \
78 sti_mixer_reg_read(mixer, reg))
79
mixer_dbg_ctl(struct seq_file * s,int val)80 static void mixer_dbg_ctl(struct seq_file *s, int val)
81 {
82 unsigned int i;
83 int count = 0;
84 char *const disp_layer[] = {"BKG", "VID0", "VID1", "GDP0",
85 "GDP1", "GDP2", "GDP3"};
86
87 seq_puts(s, "\tEnabled: ");
88 for (i = 0; i < 7; i++) {
89 if (val & 1) {
90 seq_printf(s, "%s ", disp_layer[i]);
91 count++;
92 }
93 val = val >> 1;
94 }
95
96 val = val >> 2;
97 if (val & 1) {
98 seq_puts(s, "CURS ");
99 count++;
100 }
101 if (!count)
102 seq_puts(s, "Nothing");
103 }
104
mixer_dbg_crb(struct seq_file * s,int val)105 static void mixer_dbg_crb(struct seq_file *s, int val)
106 {
107 int i;
108
109 seq_puts(s, "\tDepth: ");
110 for (i = 0; i < GAM_MIXER_NB_DEPTH_LEVEL; i++) {
111 switch (val & GAM_DEPTH_MASK_ID) {
112 case GAM_DEPTH_VID0_ID:
113 seq_puts(s, "VID0");
114 break;
115 case GAM_DEPTH_VID1_ID:
116 seq_puts(s, "VID1");
117 break;
118 case GAM_DEPTH_GDP0_ID:
119 seq_puts(s, "GDP0");
120 break;
121 case GAM_DEPTH_GDP1_ID:
122 seq_puts(s, "GDP1");
123 break;
124 case GAM_DEPTH_GDP2_ID:
125 seq_puts(s, "GDP2");
126 break;
127 case GAM_DEPTH_GDP3_ID:
128 seq_puts(s, "GDP3");
129 break;
130 default:
131 seq_puts(s, "---");
132 }
133
134 if (i < GAM_MIXER_NB_DEPTH_LEVEL - 1)
135 seq_puts(s, " < ");
136 val = val >> 3;
137 }
138 }
139
mixer_dbg_mxn(struct seq_file * s,void * addr)140 static void mixer_dbg_mxn(struct seq_file *s, void *addr)
141 {
142 int i;
143
144 for (i = 1; i < 8; i++)
145 seq_printf(s, "-0x%08X", (int)readl(addr + i * 4));
146 }
147
mixer_dbg_show(struct seq_file * s,void * arg)148 static int mixer_dbg_show(struct seq_file *s, void *arg)
149 {
150 struct drm_info_node *node = s->private;
151 struct sti_mixer *mixer = (struct sti_mixer *)node->info_ent->data;
152
153 seq_printf(s, "%s: (vaddr = 0x%p)",
154 sti_mixer_to_str(mixer), mixer->regs);
155
156 DBGFS_DUMP(GAM_MIXER_CTL);
157 mixer_dbg_ctl(s, sti_mixer_reg_read(mixer, GAM_MIXER_CTL));
158 DBGFS_DUMP(GAM_MIXER_BKC);
159 DBGFS_DUMP(GAM_MIXER_BCO);
160 DBGFS_DUMP(GAM_MIXER_BCS);
161 DBGFS_DUMP(GAM_MIXER_AVO);
162 DBGFS_DUMP(GAM_MIXER_AVS);
163 DBGFS_DUMP(GAM_MIXER_CRB);
164 mixer_dbg_crb(s, sti_mixer_reg_read(mixer, GAM_MIXER_CRB));
165 DBGFS_DUMP(GAM_MIXER_ACT);
166 DBGFS_DUMP(GAM_MIXER_MBP);
167 DBGFS_DUMP(GAM_MIXER_MX0);
168 mixer_dbg_mxn(s, mixer->regs + GAM_MIXER_MX0);
169 seq_putc(s, '\n');
170 return 0;
171 }
172
173 static struct drm_info_list mixer0_debugfs_files[] = {
174 { "mixer_main", mixer_dbg_show, 0, NULL },
175 };
176
177 static struct drm_info_list mixer1_debugfs_files[] = {
178 { "mixer_aux", mixer_dbg_show, 0, NULL },
179 };
180
sti_mixer_debugfs_init(struct sti_mixer * mixer,struct drm_minor * minor)181 int sti_mixer_debugfs_init(struct sti_mixer *mixer, struct drm_minor *minor)
182 {
183 unsigned int i;
184 struct drm_info_list *mixer_debugfs_files;
185 int nb_files;
186
187 switch (mixer->id) {
188 case STI_MIXER_MAIN:
189 mixer_debugfs_files = mixer0_debugfs_files;
190 nb_files = ARRAY_SIZE(mixer0_debugfs_files);
191 break;
192 case STI_MIXER_AUX:
193 mixer_debugfs_files = mixer1_debugfs_files;
194 nb_files = ARRAY_SIZE(mixer1_debugfs_files);
195 break;
196 default:
197 return -EINVAL;
198 }
199
200 for (i = 0; i < nb_files; i++)
201 mixer_debugfs_files[i].data = mixer;
202
203 return drm_debugfs_create_files(mixer_debugfs_files,
204 nb_files,
205 minor->debugfs_root, minor);
206 }
207
sti_mixer_set_background_status(struct sti_mixer * mixer,bool enable)208 void sti_mixer_set_background_status(struct sti_mixer *mixer, bool enable)
209 {
210 u32 val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL);
211
212 val &= ~GAM_CTL_BACK_MASK;
213 val |= enable;
214 sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);
215 }
216
sti_mixer_set_background_color(struct sti_mixer * mixer,unsigned int rgb)217 static void sti_mixer_set_background_color(struct sti_mixer *mixer,
218 unsigned int rgb)
219 {
220 sti_mixer_reg_write(mixer, GAM_MIXER_BKC, rgb);
221 }
222
sti_mixer_set_background_area(struct sti_mixer * mixer,struct drm_display_mode * mode)223 static void sti_mixer_set_background_area(struct sti_mixer *mixer,
224 struct drm_display_mode *mode)
225 {
226 u32 ydo, xdo, yds, xds;
227
228 ydo = sti_vtg_get_line_number(*mode, 0);
229 yds = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
230 xdo = sti_vtg_get_pixel_number(*mode, 0);
231 xds = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
232
233 sti_mixer_reg_write(mixer, GAM_MIXER_BCO, ydo << 16 | xdo);
234 sti_mixer_reg_write(mixer, GAM_MIXER_BCS, yds << 16 | xds);
235 }
236
sti_mixer_set_plane_depth(struct sti_mixer * mixer,struct sti_plane * plane)237 int sti_mixer_set_plane_depth(struct sti_mixer *mixer, struct sti_plane *plane)
238 {
239 int plane_id, depth = plane->drm_plane.state->normalized_zpos;
240 unsigned int i;
241 u32 mask, val;
242
243 switch (plane->desc) {
244 case STI_GDP_0:
245 plane_id = GAM_DEPTH_GDP0_ID;
246 break;
247 case STI_GDP_1:
248 plane_id = GAM_DEPTH_GDP1_ID;
249 break;
250 case STI_GDP_2:
251 plane_id = GAM_DEPTH_GDP2_ID;
252 break;
253 case STI_GDP_3:
254 plane_id = GAM_DEPTH_GDP3_ID;
255 break;
256 case STI_HQVDP_0:
257 plane_id = GAM_DEPTH_VID0_ID;
258 break;
259 case STI_CURSOR:
260 /* no need to set depth for cursor */
261 return 0;
262 default:
263 DRM_ERROR("Unknown plane %d\n", plane->desc);
264 return 1;
265 }
266
267 /* Search if a previous depth was already assigned to the plane */
268 val = sti_mixer_reg_read(mixer, GAM_MIXER_CRB);
269 for (i = 0; i < GAM_MIXER_NB_DEPTH_LEVEL; i++) {
270 mask = GAM_DEPTH_MASK_ID << (3 * i);
271 if ((val & mask) == plane_id << (3 * i))
272 break;
273 }
274
275 mask |= GAM_DEPTH_MASK_ID << (3 * depth);
276 plane_id = plane_id << (3 * depth);
277
278 DRM_DEBUG_DRIVER("%s %s depth=%d\n", sti_mixer_to_str(mixer),
279 sti_plane_to_str(plane), depth);
280 dev_dbg(mixer->dev, "GAM_MIXER_CRB val 0x%x mask 0x%x\n",
281 plane_id, mask);
282
283 val &= ~mask;
284 val |= plane_id;
285 sti_mixer_reg_write(mixer, GAM_MIXER_CRB, val);
286
287 dev_dbg(mixer->dev, "Read GAM_MIXER_CRB 0x%x\n",
288 sti_mixer_reg_read(mixer, GAM_MIXER_CRB));
289 return 0;
290 }
291
sti_mixer_active_video_area(struct sti_mixer * mixer,struct drm_display_mode * mode)292 int sti_mixer_active_video_area(struct sti_mixer *mixer,
293 struct drm_display_mode *mode)
294 {
295 u32 ydo, xdo, yds, xds;
296
297 ydo = sti_vtg_get_line_number(*mode, 0);
298 yds = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
299 xdo = sti_vtg_get_pixel_number(*mode, 0);
300 xds = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
301
302 DRM_DEBUG_DRIVER("%s active video area xdo:%d ydo:%d xds:%d yds:%d\n",
303 sti_mixer_to_str(mixer), xdo, ydo, xds, yds);
304 sti_mixer_reg_write(mixer, GAM_MIXER_AVO, ydo << 16 | xdo);
305 sti_mixer_reg_write(mixer, GAM_MIXER_AVS, yds << 16 | xds);
306
307 sti_mixer_set_background_color(mixer, bkg_color);
308
309 sti_mixer_set_background_area(mixer, mode);
310 sti_mixer_set_background_status(mixer, true);
311 return 0;
312 }
313
sti_mixer_get_plane_mask(struct sti_plane * plane)314 static u32 sti_mixer_get_plane_mask(struct sti_plane *plane)
315 {
316 switch (plane->desc) {
317 case STI_BACK:
318 return GAM_CTL_BACK_MASK;
319 case STI_GDP_0:
320 return GAM_CTL_GDP0_MASK;
321 case STI_GDP_1:
322 return GAM_CTL_GDP1_MASK;
323 case STI_GDP_2:
324 return GAM_CTL_GDP2_MASK;
325 case STI_GDP_3:
326 return GAM_CTL_GDP3_MASK;
327 case STI_HQVDP_0:
328 return GAM_CTL_VID0_MASK;
329 case STI_CURSOR:
330 return GAM_CTL_CURSOR_MASK;
331 default:
332 return 0;
333 }
334 }
335
sti_mixer_set_plane_status(struct sti_mixer * mixer,struct sti_plane * plane,bool status)336 int sti_mixer_set_plane_status(struct sti_mixer *mixer,
337 struct sti_plane *plane, bool status)
338 {
339 u32 mask, val;
340
341 DRM_DEBUG_DRIVER("%s %s %s\n", status ? "enable" : "disable",
342 sti_mixer_to_str(mixer), sti_plane_to_str(plane));
343
344 mask = sti_mixer_get_plane_mask(plane);
345 if (!mask) {
346 DRM_ERROR("Can't find layer mask\n");
347 return -EINVAL;
348 }
349
350 val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL);
351 val &= ~mask;
352 val |= status ? mask : 0;
353 sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);
354
355 return 0;
356 }
357
sti_mixer_create(struct device * dev,struct drm_device * drm_dev,int id,void __iomem * baseaddr)358 struct sti_mixer *sti_mixer_create(struct device *dev,
359 struct drm_device *drm_dev,
360 int id,
361 void __iomem *baseaddr)
362 {
363 struct sti_mixer *mixer = devm_kzalloc(dev, sizeof(*mixer), GFP_KERNEL);
364
365 dev_dbg(dev, "%s\n", __func__);
366 if (!mixer) {
367 DRM_ERROR("Failed to allocated memory for mixer\n");
368 return NULL;
369 }
370 mixer->regs = baseaddr;
371 mixer->dev = dev;
372 mixer->id = id;
373
374 DRM_DEBUG_DRIVER("%s created. Regs=%p\n",
375 sti_mixer_to_str(mixer), mixer->regs);
376
377 return mixer;
378 }
379
