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path: root/drivers/video/fbdev/via/dvi.c
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Diffstat (limited to 'drivers/video/fbdev/via/dvi.c')
-rw-r--r--drivers/video/fbdev/via/dvi.c478
1 files changed, 478 insertions, 0 deletions
diff --git a/drivers/video/fbdev/via/dvi.c b/drivers/video/fbdev/via/dvi.c
new file mode 100644
index 000000000000..7789553952d3
--- /dev/null
+++ b/drivers/video/fbdev/via/dvi.c
@@ -0,0 +1,478 @@
1/*
2 * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
3 * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
4
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public
7 * License as published by the Free Software Foundation;
8 * either version 2, or (at your option) any later version.
9
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
12 * the implied warranty of MERCHANTABILITY or FITNESS FOR
13 * A PARTICULAR PURPOSE.See the GNU General Public License
14 * for more details.
15
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc.,
19 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21#include <linux/via-core.h>
22#include <linux/via_i2c.h>
23#include "global.h"
24
25static void tmds_register_write(int index, u8 data);
26static int tmds_register_read(int index);
27static int tmds_register_read_bytes(int index, u8 *buff, int buff_len);
28static void dvi_get_panel_size_from_DDCv1(
29 struct tmds_chip_information *tmds_chip,
30 struct tmds_setting_information *tmds_setting);
31static int viafb_dvi_query_EDID(void);
32
33static inline bool check_tmds_chip(int device_id_subaddr, int device_id)
34{
35 return tmds_register_read(device_id_subaddr) == device_id;
36}
37
38void viafb_init_dvi_size(struct tmds_chip_information *tmds_chip,
39 struct tmds_setting_information *tmds_setting)
40{
41 DEBUG_MSG(KERN_INFO "viafb_init_dvi_size()\n");
42
43 viafb_dvi_sense();
44 if (viafb_dvi_query_EDID() == 1)
45 dvi_get_panel_size_from_DDCv1(tmds_chip, tmds_setting);
46
47 return;
48}
49
50bool viafb_tmds_trasmitter_identify(void)
51{
52 unsigned char sr2a = 0, sr1e = 0, sr3e = 0;
53
54 /* Turn on ouputting pad */
55 switch (viaparinfo->chip_info->gfx_chip_name) {
56 case UNICHROME_K8M890:
57 /*=* DFP Low Pad on *=*/
58 sr2a = viafb_read_reg(VIASR, SR2A);
59 viafb_write_reg_mask(SR2A, VIASR, 0x03, BIT0 + BIT1);
60 break;
61
62 case UNICHROME_P4M900:
63 case UNICHROME_P4M890:
64 /* DFP Low Pad on */
65 sr2a = viafb_read_reg(VIASR, SR2A);
66 viafb_write_reg_mask(SR2A, VIASR, 0x03, BIT0 + BIT1);
67 /* DVP0 Pad on */
68 sr1e = viafb_read_reg(VIASR, SR1E);
69 viafb_write_reg_mask(SR1E, VIASR, 0xC0, BIT6 + BIT7);
70 break;
71
72 default:
73 /* DVP0/DVP1 Pad on */
74 sr1e = viafb_read_reg(VIASR, SR1E);
75 viafb_write_reg_mask(SR1E, VIASR, 0xF0, BIT4 +
76 BIT5 + BIT6 + BIT7);
77 /* SR3E[1]Multi-function selection:
78 0 = Emulate I2C and DDC bus by GPIO2/3/4. */
79 sr3e = viafb_read_reg(VIASR, SR3E);
80 viafb_write_reg_mask(SR3E, VIASR, 0x0, BIT5);
81 break;
82 }
83
84 /* Check for VT1632: */
85 viaparinfo->chip_info->tmds_chip_info.tmds_chip_name = VT1632_TMDS;
86 viaparinfo->chip_info->
87 tmds_chip_info.tmds_chip_slave_addr = VT1632_TMDS_I2C_ADDR;
88 viaparinfo->chip_info->tmds_chip_info.i2c_port = VIA_PORT_31;
89 if (check_tmds_chip(VT1632_DEVICE_ID_REG, VT1632_DEVICE_ID)) {
90 /*
91 * Currently only support 12bits,dual edge,add 24bits mode later
92 */
93 tmds_register_write(0x08, 0x3b);
94
95 DEBUG_MSG(KERN_INFO "\n VT1632 TMDS ! \n");
96 DEBUG_MSG(KERN_INFO "\n %2d",
97 viaparinfo->chip_info->tmds_chip_info.tmds_chip_name);
98 DEBUG_MSG(KERN_INFO "\n %2d",
99 viaparinfo->chip_info->tmds_chip_info.i2c_port);
100 return true;
101 } else {
102 viaparinfo->chip_info->tmds_chip_info.i2c_port = VIA_PORT_2C;
103 if (check_tmds_chip(VT1632_DEVICE_ID_REG, VT1632_DEVICE_ID)) {
104 tmds_register_write(0x08, 0x3b);
105 DEBUG_MSG(KERN_INFO "\n VT1632 TMDS ! \n");
106 DEBUG_MSG(KERN_INFO "\n %2d",
107 viaparinfo->chip_info->
108 tmds_chip_info.tmds_chip_name);
109 DEBUG_MSG(KERN_INFO "\n %2d",
110 viaparinfo->chip_info->
111 tmds_chip_info.i2c_port);
112 return true;
113 }
114 }
115
116 viaparinfo->chip_info->tmds_chip_info.tmds_chip_name = INTEGRATED_TMDS;
117
118 if ((viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) &&
119 ((viafb_display_hardware_layout == HW_LAYOUT_DVI_ONLY) ||
120 (viafb_display_hardware_layout == HW_LAYOUT_LCD_DVI))) {
121 DEBUG_MSG(KERN_INFO "\n Integrated TMDS ! \n");
122 return true;
123 }
124
125 switch (viaparinfo->chip_info->gfx_chip_name) {
126 case UNICHROME_K8M890:
127 viafb_write_reg(SR2A, VIASR, sr2a);
128 break;
129
130 case UNICHROME_P4M900:
131 case UNICHROME_P4M890:
132 viafb_write_reg(SR2A, VIASR, sr2a);
133 viafb_write_reg(SR1E, VIASR, sr1e);
134 break;
135
136 default:
137 viafb_write_reg(SR1E, VIASR, sr1e);
138 viafb_write_reg(SR3E, VIASR, sr3e);
139 break;
140 }
141
142 viaparinfo->chip_info->
143 tmds_chip_info.tmds_chip_name = NON_TMDS_TRANSMITTER;
144 viaparinfo->chip_info->tmds_chip_info.
145 tmds_chip_slave_addr = VT1632_TMDS_I2C_ADDR;
146 return false;
147}
148
149static void tmds_register_write(int index, u8 data)
150{
151 viafb_i2c_writebyte(viaparinfo->chip_info->tmds_chip_info.i2c_port,
152 viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
153 index, data);
154}
155
156static int tmds_register_read(int index)
157{
158 u8 data;
159
160 viafb_i2c_readbyte(viaparinfo->chip_info->tmds_chip_info.i2c_port,
161 (u8) viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
162 (u8) index, &data);
163 return data;
164}
165
166static int tmds_register_read_bytes(int index, u8 *buff, int buff_len)
167{
168 viafb_i2c_readbytes(viaparinfo->chip_info->tmds_chip_info.i2c_port,
169 (u8) viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr,
170 (u8) index, buff, buff_len);
171 return 0;
172}
173
174/* DVI Set Mode */
175void viafb_dvi_set_mode(const struct fb_var_screeninfo *var,
176 u16 cxres, u16 cyres, int iga)
177{
178 struct fb_var_screeninfo dvi_var = *var;
179 const struct fb_videomode *rb_mode;
180 int maxPixelClock;
181
182 maxPixelClock = viaparinfo->shared->tmds_setting_info.max_pixel_clock;
183 if (maxPixelClock && PICOS2KHZ(var->pixclock) / 1000 > maxPixelClock) {
184 rb_mode = viafb_get_best_rb_mode(var->xres, var->yres, 60);
185 if (rb_mode)
186 viafb_fill_var_timing_info(&dvi_var, rb_mode);
187 }
188
189 viafb_fill_crtc_timing(&dvi_var, cxres, cyres, iga);
190}
191
192/* Sense DVI Connector */
193int viafb_dvi_sense(void)
194{
195 u8 RegSR1E = 0, RegSR3E = 0, RegCR6B = 0, RegCR91 = 0,
196 RegCR93 = 0, RegCR9B = 0, data;
197 int ret = false;
198
199 DEBUG_MSG(KERN_INFO "viafb_dvi_sense!!\n");
200
201 if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
202 /* DI1 Pad on */
203 RegSR1E = viafb_read_reg(VIASR, SR1E);
204 viafb_write_reg(SR1E, VIASR, RegSR1E | 0x30);
205
206 /* CR6B[0]VCK Input Selection: 1 = External clock. */
207 RegCR6B = viafb_read_reg(VIACR, CR6B);
208 viafb_write_reg(CR6B, VIACR, RegCR6B | 0x08);
209
210 /* CR91[4] VDD On [3] Data On [2] VEE On [1] Back Light Off
211 [0] Software Control Power Sequence */
212 RegCR91 = viafb_read_reg(VIACR, CR91);
213 viafb_write_reg(CR91, VIACR, 0x1D);
214
215 /* CR93[7] DI1 Data Source Selection: 1 = DSP2.
216 CR93[5] DI1 Clock Source: 1 = internal.
217 CR93[4] DI1 Clock Polarity.
218 CR93[3:1] DI1 Clock Adjust. CR93[0] DI1 enable */
219 RegCR93 = viafb_read_reg(VIACR, CR93);
220 viafb_write_reg(CR93, VIACR, 0x01);
221 } else {
222 /* DVP0/DVP1 Pad on */
223 RegSR1E = viafb_read_reg(VIASR, SR1E);
224 viafb_write_reg(SR1E, VIASR, RegSR1E | 0xF0);
225
226 /* SR3E[1]Multi-function selection:
227 0 = Emulate I2C and DDC bus by GPIO2/3/4. */
228 RegSR3E = viafb_read_reg(VIASR, SR3E);
229 viafb_write_reg(SR3E, VIASR, RegSR3E & (~0x20));
230
231 /* CR91[4] VDD On [3] Data On [2] VEE On [1] Back Light Off
232 [0] Software Control Power Sequence */
233 RegCR91 = viafb_read_reg(VIACR, CR91);
234 viafb_write_reg(CR91, VIACR, 0x1D);
235
236 /*CR9B[4] DVP1 Data Source Selection: 1 = From secondary
237 display.CR9B[2:0] DVP1 Clock Adjust */
238 RegCR9B = viafb_read_reg(VIACR, CR9B);
239 viafb_write_reg(CR9B, VIACR, 0x01);
240 }
241
242 data = (u8) tmds_register_read(0x09);
243 if (data & 0x04)
244 ret = true;
245
246 if (ret == false) {
247 if (viafb_dvi_query_EDID())
248 ret = true;
249 }
250
251 /* Restore status */
252 viafb_write_reg(SR1E, VIASR, RegSR1E);
253 viafb_write_reg(CR91, VIACR, RegCR91);
254 if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
255 viafb_write_reg(CR6B, VIACR, RegCR6B);
256 viafb_write_reg(CR93, VIACR, RegCR93);
257 } else {
258 viafb_write_reg(SR3E, VIASR, RegSR3E);
259 viafb_write_reg(CR9B, VIACR, RegCR9B);
260 }
261
262 return ret;
263}
264
265/* Query Flat Panel's EDID Table Version Through DVI Connector */
266static int viafb_dvi_query_EDID(void)
267{
268 u8 data0, data1;
269 int restore;
270
271 DEBUG_MSG(KERN_INFO "viafb_dvi_query_EDID!!\n");
272
273 restore = viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr;
274 viaparinfo->chip_info->tmds_chip_info.tmds_chip_slave_addr = 0xA0;
275
276 data0 = (u8) tmds_register_read(0x00);
277 data1 = (u8) tmds_register_read(0x01);
278 if ((data0 == 0) && (data1 == 0xFF)) {
279 viaparinfo->chip_info->
280 tmds_chip_info.tmds_chip_slave_addr = restore;
281 return EDID_VERSION_1; /* Found EDID1 Table */
282 }
283
284 return false;
285}
286
287/* Get Panel Size Using EDID1 Table */
288static void dvi_get_panel_size_from_DDCv1(
289 struct tmds_chip_information *tmds_chip,
290 struct tmds_setting_information *tmds_setting)
291{
292 int i, restore;
293 unsigned char EDID_DATA[18];
294
295 DEBUG_MSG(KERN_INFO "\n dvi_get_panel_size_from_DDCv1 \n");
296
297 restore = tmds_chip->tmds_chip_slave_addr;
298 tmds_chip->tmds_chip_slave_addr = 0xA0;
299 for (i = 0x25; i < 0x6D; i++) {
300 switch (i) {
301 case 0x36:
302 case 0x48:
303 case 0x5A:
304 case 0x6C:
305 tmds_register_read_bytes(i, EDID_DATA, 10);
306 if (!(EDID_DATA[0] || EDID_DATA[1])) {
307 /* The first two byte must be zero. */
308 if (EDID_DATA[3] == 0xFD) {
309 /* To get max pixel clock. */
310 tmds_setting->max_pixel_clock =
311 EDID_DATA[9] * 10;
312 }
313 }
314 break;
315
316 default:
317 break;
318 }
319 }
320
321 DEBUG_MSG(KERN_INFO "DVI max pixelclock = %d\n",
322 tmds_setting->max_pixel_clock);
323 tmds_chip->tmds_chip_slave_addr = restore;
324}
325
326/* If Disable DVI, turn off pad */
327void viafb_dvi_disable(void)
328{
329 if (viaparinfo->chip_info->
330 tmds_chip_info.output_interface == INTERFACE_TMDS)
331 /* Turn off TMDS power. */
332 viafb_write_reg(CRD2, VIACR,
333 viafb_read_reg(VIACR, CRD2) | 0x08);
334}
335
336static void dvi_patch_skew_dvp0(void)
337{
338 /* Reset data driving first: */
339 viafb_write_reg_mask(SR1B, VIASR, 0, BIT1);
340 viafb_write_reg_mask(SR2A, VIASR, 0, BIT4);
341
342 switch (viaparinfo->chip_info->gfx_chip_name) {
343 case UNICHROME_P4M890:
344 {
345 if ((viaparinfo->tmds_setting_info->h_active == 1600) &&
346 (viaparinfo->tmds_setting_info->v_active ==
347 1200))
348 viafb_write_reg_mask(CR96, VIACR, 0x03,
349 BIT0 + BIT1 + BIT2);
350 else
351 viafb_write_reg_mask(CR96, VIACR, 0x07,
352 BIT0 + BIT1 + BIT2);
353 break;
354 }
355
356 case UNICHROME_P4M900:
357 {
358 viafb_write_reg_mask(CR96, VIACR, 0x07,
359 BIT0 + BIT1 + BIT2 + BIT3);
360 viafb_write_reg_mask(SR1B, VIASR, 0x02, BIT1);
361 viafb_write_reg_mask(SR2A, VIASR, 0x10, BIT4);
362 break;
363 }
364
365 default:
366 {
367 break;
368 }
369 }
370}
371
372static void dvi_patch_skew_dvp_low(void)
373{
374 switch (viaparinfo->chip_info->gfx_chip_name) {
375 case UNICHROME_K8M890:
376 {
377 viafb_write_reg_mask(CR99, VIACR, 0x03, BIT0 + BIT1);
378 break;
379 }
380
381 case UNICHROME_P4M900:
382 {
383 viafb_write_reg_mask(CR99, VIACR, 0x08,
384 BIT0 + BIT1 + BIT2 + BIT3);
385 break;
386 }
387
388 case UNICHROME_P4M890:
389 {
390 viafb_write_reg_mask(CR99, VIACR, 0x0F,
391 BIT0 + BIT1 + BIT2 + BIT3);
392 break;
393 }
394
395 default:
396 {
397 break;
398 }
399 }
400}
401
402/* If Enable DVI, turn off pad */
403void viafb_dvi_enable(void)
404{
405 u8 data;
406
407 switch (viaparinfo->chip_info->tmds_chip_info.output_interface) {
408 case INTERFACE_DVP0:
409 viafb_write_reg_mask(CR6B, VIACR, 0x01, BIT0);
410 viafb_write_reg_mask(CR6C, VIACR, 0x21, BIT0 + BIT5);
411 dvi_patch_skew_dvp0();
412 if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
413 tmds_register_write(0x88, 0x3b);
414 else
415 /*clear CR91[5] to direct on display period
416 in the secondary diplay path */
417 via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
418 break;
419
420 case INTERFACE_DVP1:
421 if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
422 viafb_write_reg_mask(CR93, VIACR, 0x21, BIT0 + BIT5);
423
424 /*fix dvi cann't be enabled with MB VT5718C4 - Al Zhang */
425 if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
426 tmds_register_write(0x88, 0x3b);
427 else
428 /*clear CR91[5] to direct on display period
429 in the secondary diplay path */
430 via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
431
432 /*fix DVI cannot enable on EPIA-M board */
433 if (viafb_platform_epia_dvi == 1) {
434 viafb_write_reg_mask(CR91, VIACR, 0x1f, 0x1f);
435 viafb_write_reg_mask(CR88, VIACR, 0x00, BIT6 + BIT0);
436 if (viafb_bus_width == 24) {
437 if (viafb_device_lcd_dualedge == 1)
438 data = 0x3F;
439 else
440 data = 0x37;
441 viafb_i2c_writebyte(viaparinfo->chip_info->
442 tmds_chip_info.i2c_port,
443 viaparinfo->chip_info->
444 tmds_chip_info.tmds_chip_slave_addr,
445 0x08, data);
446 }
447 }
448 break;
449
450 case INTERFACE_DFP_HIGH:
451 if (viaparinfo->chip_info->gfx_chip_name != UNICHROME_CLE266)
452 via_write_reg_mask(VIACR, CR97, 0x03, 0x03);
453
454 via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
455 break;
456
457 case INTERFACE_DFP_LOW:
458 if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266)
459 break;
460
461 dvi_patch_skew_dvp_low();
462 via_write_reg_mask(VIACR, 0x91, 0x00, 0x20);
463 break;
464
465 case INTERFACE_TMDS:
466 /* Turn on Display period in the panel path. */
467 viafb_write_reg_mask(CR91, VIACR, 0, BIT7);
468
469 /* Turn on TMDS power. */
470 viafb_write_reg_mask(CRD2, VIACR, 0, BIT3);
471 break;
472 }
473
474 if (viaparinfo->tmds_setting_info->iga_path == IGA2) {
475 /* Disable LCD Scaling */
476 viafb_write_reg_mask(CR79, VIACR, 0x00, BIT0);
477 }
478}
generated by cgit v1.2.2 (git 2.25.0) at 2025-08-24 09:25:09 -0400