1 /*
2 * Copyright © 2006 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Eric Anholt <eric@anholt.net>
25 *
26 */
27
28 #include "intel_display_types.h"
29 #include "intel_dvo_dev.h"
30
31 #define CH7017_TV_DISPLAY_MODE 0x00
32 #define CH7017_FLICKER_FILTER 0x01
33 #define CH7017_VIDEO_BANDWIDTH 0x02
34 #define CH7017_TEXT_ENHANCEMENT 0x03
35 #define CH7017_START_ACTIVE_VIDEO 0x04
36 #define CH7017_HORIZONTAL_POSITION 0x05
37 #define CH7017_VERTICAL_POSITION 0x06
38 #define CH7017_BLACK_LEVEL 0x07
39 #define CH7017_CONTRAST_ENHANCEMENT 0x08
40 #define CH7017_TV_PLL 0x09
41 #define CH7017_TV_PLL_M 0x0a
42 #define CH7017_TV_PLL_N 0x0b
43 #define CH7017_SUB_CARRIER_0 0x0c
44 #define CH7017_CIV_CONTROL 0x10
45 #define CH7017_CIV_0 0x11
46 #define CH7017_CHROMA_BOOST 0x14
47 #define CH7017_CLOCK_MODE 0x1c
48 #define CH7017_INPUT_CLOCK 0x1d
49 #define CH7017_GPIO_CONTROL 0x1e
50 #define CH7017_INPUT_DATA_FORMAT 0x1f
51 #define CH7017_CONNECTION_DETECT 0x20
52 #define CH7017_DAC_CONTROL 0x21
53 #define CH7017_BUFFERED_CLOCK_OUTPUT 0x22
54 #define CH7017_DEFEAT_VSYNC 0x47
55 #define CH7017_TEST_PATTERN 0x48
56
57 #define CH7017_POWER_MANAGEMENT 0x49
58 /** Enables the TV output path. */
59 #define CH7017_TV_EN (1 << 0)
60 #define CH7017_DAC0_POWER_DOWN (1 << 1)
61 #define CH7017_DAC1_POWER_DOWN (1 << 2)
62 #define CH7017_DAC2_POWER_DOWN (1 << 3)
63 #define CH7017_DAC3_POWER_DOWN (1 << 4)
64 /** Powers down the TV out block, and DAC0-3 */
65 #define CH7017_TV_POWER_DOWN_EN (1 << 5)
66
67 #define CH7017_VERSION_ID 0x4a
68
69 #define CH7017_DEVICE_ID 0x4b
70 #define CH7017_DEVICE_ID_VALUE 0x1b
71 #define CH7018_DEVICE_ID_VALUE 0x1a
72 #define CH7019_DEVICE_ID_VALUE 0x19
73
74 #define CH7017_XCLK_D2_ADJUST 0x53
75 #define CH7017_UP_SCALER_COEFF_0 0x55
76 #define CH7017_UP_SCALER_COEFF_1 0x56
77 #define CH7017_UP_SCALER_COEFF_2 0x57
78 #define CH7017_UP_SCALER_COEFF_3 0x58
79 #define CH7017_UP_SCALER_COEFF_4 0x59
80 #define CH7017_UP_SCALER_VERTICAL_INC_0 0x5a
81 #define CH7017_UP_SCALER_VERTICAL_INC_1 0x5b
82 #define CH7017_GPIO_INVERT 0x5c
83 #define CH7017_UP_SCALER_HORIZONTAL_INC_0 0x5d
84 #define CH7017_UP_SCALER_HORIZONTAL_INC_1 0x5e
85
86 #define CH7017_HORIZONTAL_ACTIVE_PIXEL_INPUT 0x5f
87 /**< Low bits of horizontal active pixel input */
88
89 #define CH7017_ACTIVE_INPUT_LINE_OUTPUT 0x60
90 /** High bits of horizontal active pixel input */
91 #define CH7017_LVDS_HAP_INPUT_MASK (0x7 << 0)
92 /** High bits of vertical active line output */
93 #define CH7017_LVDS_VAL_HIGH_MASK (0x7 << 3)
94
95 #define CH7017_VERTICAL_ACTIVE_LINE_OUTPUT 0x61
96 /**< Low bits of vertical active line output */
97
98 #define CH7017_HORIZONTAL_ACTIVE_PIXEL_OUTPUT 0x62
99 /**< Low bits of horizontal active pixel output */
100
101 #define CH7017_LVDS_POWER_DOWN 0x63
102 /** High bits of horizontal active pixel output */
103 #define CH7017_LVDS_HAP_HIGH_MASK (0x7 << 0)
104 /** Enables the LVDS power down state transition */
105 #define CH7017_LVDS_POWER_DOWN_EN (1 << 6)
106 /** Enables the LVDS upscaler */
107 #define CH7017_LVDS_UPSCALER_EN (1 << 7)
108 #define CH7017_LVDS_POWER_DOWN_DEFAULT_RESERVED 0x08
109
110 #define CH7017_LVDS_ENCODING 0x64
111 #define CH7017_LVDS_DITHER_2D (1 << 2)
112 #define CH7017_LVDS_DITHER_DIS (1 << 3)
113 #define CH7017_LVDS_DUAL_CHANNEL_EN (1 << 4)
114 #define CH7017_LVDS_24_BIT (1 << 5)
115
116 #define CH7017_LVDS_ENCODING_2 0x65
117
118 #define CH7017_LVDS_PLL_CONTROL 0x66
119 /** Enables the LVDS panel output path */
120 #define CH7017_LVDS_PANEN (1 << 0)
121 /** Enables the LVDS panel backlight */
122 #define CH7017_LVDS_BKLEN (1 << 3)
123
124 #define CH7017_POWER_SEQUENCING_T1 0x67
125 #define CH7017_POWER_SEQUENCING_T2 0x68
126 #define CH7017_POWER_SEQUENCING_T3 0x69
127 #define CH7017_POWER_SEQUENCING_T4 0x6a
128 #define CH7017_POWER_SEQUENCING_T5 0x6b
129 #define CH7017_GPIO_DRIVER_TYPE 0x6c
130 #define CH7017_GPIO_DATA 0x6d
131 #define CH7017_GPIO_DIRECTION_CONTROL 0x6e
132
133 #define CH7017_LVDS_PLL_FEEDBACK_DIV 0x71
134 # define CH7017_LVDS_PLL_FEED_BACK_DIVIDER_SHIFT 4
135 # define CH7017_LVDS_PLL_FEED_FORWARD_DIVIDER_SHIFT 0
136 # define CH7017_LVDS_PLL_FEEDBACK_DEFAULT_RESERVED 0x80
137
138 #define CH7017_LVDS_PLL_VCO_CONTROL 0x72
139 # define CH7017_LVDS_PLL_VCO_DEFAULT_RESERVED 0x80
140 # define CH7017_LVDS_PLL_VCO_SHIFT 4
141 # define CH7017_LVDS_PLL_POST_SCALE_DIV_SHIFT 0
142
143 #define CH7017_OUTPUTS_ENABLE 0x73
144 # define CH7017_CHARGE_PUMP_LOW 0x0
145 # define CH7017_CHARGE_PUMP_HIGH 0x3
146 # define CH7017_LVDS_CHANNEL_A (1 << 3)
147 # define CH7017_LVDS_CHANNEL_B (1 << 4)
148 # define CH7017_TV_DAC_A (1 << 5)
149 # define CH7017_TV_DAC_B (1 << 6)
150 # define CH7017_DDC_SELECT_DC2 (1 << 7)
151
152 #define CH7017_LVDS_OUTPUT_AMPLITUDE 0x74
153 #define CH7017_LVDS_PLL_EMI_REDUCTION 0x75
154 #define CH7017_LVDS_POWER_DOWN_FLICKER 0x76
155
156 #define CH7017_LVDS_CONTROL_2 0x78
157 # define CH7017_LOOP_FILTER_SHIFT 5
158 # define CH7017_PHASE_DETECTOR_SHIFT 0
159
160 #define CH7017_BANG_LIMIT_CONTROL 0x7f
161
162 struct ch7017_priv {
163 u8 dummy;
164 };
165
166 static void ch7017_dump_regs(struct intel_dvo_device *dvo);
167 static void ch7017_dpms(struct intel_dvo_device *dvo, bool enable);
168
ch7017_read(struct intel_dvo_device * dvo,u8 addr,u8 * val)169 static bool ch7017_read(struct intel_dvo_device *dvo, u8 addr, u8 *val)
170 {
171 struct i2c_msg msgs[] = {
172 {
173 .addr = dvo->target_addr,
174 .flags = 0,
175 .len = 1,
176 .buf = &addr,
177 },
178 {
179 .addr = dvo->target_addr,
180 .flags = I2C_M_RD,
181 .len = 1,
182 .buf = val,
183 }
184 };
185 return i2c_transfer(dvo->i2c_bus, msgs, 2) == 2;
186 }
187
ch7017_write(struct intel_dvo_device * dvo,u8 addr,u8 val)188 static bool ch7017_write(struct intel_dvo_device *dvo, u8 addr, u8 val)
189 {
190 u8 buf[2] = { addr, val };
191 struct i2c_msg msg = {
192 .addr = dvo->target_addr,
193 .flags = 0,
194 .len = 2,
195 .buf = buf,
196 };
197 return i2c_transfer(dvo->i2c_bus, &msg, 1) == 1;
198 }
199
200 /** Probes for a CH7017 on the given bus and target address. */
ch7017_init(struct intel_dvo_device * dvo,struct i2c_adapter * adapter)201 static bool ch7017_init(struct intel_dvo_device *dvo,
202 struct i2c_adapter *adapter)
203 {
204 struct ch7017_priv *priv;
205 const char *str;
206 u8 val;
207
208 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
209 if (priv == NULL)
210 return false;
211
212 dvo->i2c_bus = adapter;
213 dvo->dev_priv = priv;
214
215 if (!ch7017_read(dvo, CH7017_DEVICE_ID, &val))
216 goto fail;
217
218 switch (val) {
219 case CH7017_DEVICE_ID_VALUE:
220 str = "ch7017";
221 break;
222 case CH7018_DEVICE_ID_VALUE:
223 str = "ch7018";
224 break;
225 case CH7019_DEVICE_ID_VALUE:
226 str = "ch7019";
227 break;
228 default:
229 DRM_DEBUG_KMS("ch701x not detected, got %d: from %s "
230 "target %d.\n",
231 val, adapter->name, dvo->target_addr);
232 goto fail;
233 }
234
235 DRM_DEBUG_KMS("%s detected on %s, addr %d\n",
236 str, adapter->name, dvo->target_addr);
237 return true;
238
239 fail:
240 kfree(priv);
241 return false;
242 }
243
ch7017_detect(struct intel_dvo_device * dvo)244 static enum drm_connector_status ch7017_detect(struct intel_dvo_device *dvo)
245 {
246 return connector_status_connected;
247 }
248
ch7017_mode_valid(struct intel_dvo_device * dvo,struct drm_display_mode * mode)249 static enum drm_mode_status ch7017_mode_valid(struct intel_dvo_device *dvo,
250 struct drm_display_mode *mode)
251 {
252 if (mode->clock > 160000)
253 return MODE_CLOCK_HIGH;
254
255 return MODE_OK;
256 }
257
ch7017_mode_set(struct intel_dvo_device * dvo,const struct drm_display_mode * mode,const struct drm_display_mode * adjusted_mode)258 static void ch7017_mode_set(struct intel_dvo_device *dvo,
259 const struct drm_display_mode *mode,
260 const struct drm_display_mode *adjusted_mode)
261 {
262 u8 lvds_pll_feedback_div, lvds_pll_vco_control;
263 u8 outputs_enable, lvds_control_2, lvds_power_down;
264 u8 horizontal_active_pixel_input;
265 u8 horizontal_active_pixel_output, vertical_active_line_output;
266 u8 active_input_line_output;
267
268 DRM_DEBUG_KMS("Registers before mode setting\n");
269 ch7017_dump_regs(dvo);
270
271 /* LVDS PLL settings from page 75 of 7017-7017ds.pdf*/
272 if (mode->clock < 100000) {
273 outputs_enable = CH7017_LVDS_CHANNEL_A | CH7017_CHARGE_PUMP_LOW;
274 lvds_pll_feedback_div = CH7017_LVDS_PLL_FEEDBACK_DEFAULT_RESERVED |
275 (2 << CH7017_LVDS_PLL_FEED_BACK_DIVIDER_SHIFT) |
276 (13 << CH7017_LVDS_PLL_FEED_FORWARD_DIVIDER_SHIFT);
277 lvds_pll_vco_control = CH7017_LVDS_PLL_VCO_DEFAULT_RESERVED |
278 (2 << CH7017_LVDS_PLL_VCO_SHIFT) |
279 (3 << CH7017_LVDS_PLL_POST_SCALE_DIV_SHIFT);
280 lvds_control_2 = (1 << CH7017_LOOP_FILTER_SHIFT) |
281 (0 << CH7017_PHASE_DETECTOR_SHIFT);
282 } else {
283 outputs_enable = CH7017_LVDS_CHANNEL_A | CH7017_CHARGE_PUMP_HIGH;
284 lvds_pll_feedback_div =
285 CH7017_LVDS_PLL_FEEDBACK_DEFAULT_RESERVED |
286 (2 << CH7017_LVDS_PLL_FEED_BACK_DIVIDER_SHIFT) |
287 (3 << CH7017_LVDS_PLL_FEED_FORWARD_DIVIDER_SHIFT);
288 lvds_control_2 = (3 << CH7017_LOOP_FILTER_SHIFT) |
289 (0 << CH7017_PHASE_DETECTOR_SHIFT);
290 if (1) { /* XXX: dual channel panel detection. Assume yes for now. */
291 outputs_enable |= CH7017_LVDS_CHANNEL_B;
292 lvds_pll_vco_control = CH7017_LVDS_PLL_VCO_DEFAULT_RESERVED |
293 (2 << CH7017_LVDS_PLL_VCO_SHIFT) |
294 (13 << CH7017_LVDS_PLL_POST_SCALE_DIV_SHIFT);
295 } else {
296 lvds_pll_vco_control = CH7017_LVDS_PLL_VCO_DEFAULT_RESERVED |
297 (1 << CH7017_LVDS_PLL_VCO_SHIFT) |
298 (13 << CH7017_LVDS_PLL_POST_SCALE_DIV_SHIFT);
299 }
300 }
301
302 horizontal_active_pixel_input = mode->hdisplay & 0x00ff;
303
304 vertical_active_line_output = mode->vdisplay & 0x00ff;
305 horizontal_active_pixel_output = mode->hdisplay & 0x00ff;
306
307 active_input_line_output = ((mode->hdisplay & 0x0700) >> 8) |
308 (((mode->vdisplay & 0x0700) >> 8) << 3);
309
310 lvds_power_down = CH7017_LVDS_POWER_DOWN_DEFAULT_RESERVED |
311 (mode->hdisplay & 0x0700) >> 8;
312
313 ch7017_dpms(dvo, false);
314 ch7017_write(dvo, CH7017_HORIZONTAL_ACTIVE_PIXEL_INPUT,
315 horizontal_active_pixel_input);
316 ch7017_write(dvo, CH7017_HORIZONTAL_ACTIVE_PIXEL_OUTPUT,
317 horizontal_active_pixel_output);
318 ch7017_write(dvo, CH7017_VERTICAL_ACTIVE_LINE_OUTPUT,
319 vertical_active_line_output);
320 ch7017_write(dvo, CH7017_ACTIVE_INPUT_LINE_OUTPUT,
321 active_input_line_output);
322 ch7017_write(dvo, CH7017_LVDS_PLL_VCO_CONTROL, lvds_pll_vco_control);
323 ch7017_write(dvo, CH7017_LVDS_PLL_FEEDBACK_DIV, lvds_pll_feedback_div);
324 ch7017_write(dvo, CH7017_LVDS_CONTROL_2, lvds_control_2);
325 ch7017_write(dvo, CH7017_OUTPUTS_ENABLE, outputs_enable);
326
327 /* Turn the LVDS back on with new settings. */
328 ch7017_write(dvo, CH7017_LVDS_POWER_DOWN, lvds_power_down);
329
330 DRM_DEBUG_KMS("Registers after mode setting\n");
331 ch7017_dump_regs(dvo);
332 }
333
334 /* set the CH7017 power state */
ch7017_dpms(struct intel_dvo_device * dvo,bool enable)335 static void ch7017_dpms(struct intel_dvo_device *dvo, bool enable)
336 {
337 u8 val;
338
339 ch7017_read(dvo, CH7017_LVDS_POWER_DOWN, &val);
340
341 /* Turn off TV/VGA, and never turn it on since we don't support it. */
342 ch7017_write(dvo, CH7017_POWER_MANAGEMENT,
343 CH7017_DAC0_POWER_DOWN |
344 CH7017_DAC1_POWER_DOWN |
345 CH7017_DAC2_POWER_DOWN |
346 CH7017_DAC3_POWER_DOWN |
347 CH7017_TV_POWER_DOWN_EN);
348
349 if (enable) {
350 /* Turn on the LVDS */
351 ch7017_write(dvo, CH7017_LVDS_POWER_DOWN,
352 val & ~CH7017_LVDS_POWER_DOWN_EN);
353 } else {
354 /* Turn off the LVDS */
355 ch7017_write(dvo, CH7017_LVDS_POWER_DOWN,
356 val | CH7017_LVDS_POWER_DOWN_EN);
357 }
358
359 /* XXX: Should actually wait for update power status somehow */
360 msleep(20);
361 }
362
ch7017_get_hw_state(struct intel_dvo_device * dvo)363 static bool ch7017_get_hw_state(struct intel_dvo_device *dvo)
364 {
365 u8 val;
366
367 ch7017_read(dvo, CH7017_LVDS_POWER_DOWN, &val);
368
369 if (val & CH7017_LVDS_POWER_DOWN_EN)
370 return false;
371 else
372 return true;
373 }
374
ch7017_dump_regs(struct intel_dvo_device * dvo)375 static void ch7017_dump_regs(struct intel_dvo_device *dvo)
376 {
377 u8 val;
378
379 #define DUMP(reg) \
380 do { \
381 ch7017_read(dvo, reg, &val); \
382 DRM_DEBUG_KMS(#reg ": %02x\n", val); \
383 } while (0)
384
385 DUMP(CH7017_HORIZONTAL_ACTIVE_PIXEL_INPUT);
386 DUMP(CH7017_HORIZONTAL_ACTIVE_PIXEL_OUTPUT);
387 DUMP(CH7017_VERTICAL_ACTIVE_LINE_OUTPUT);
388 DUMP(CH7017_ACTIVE_INPUT_LINE_OUTPUT);
389 DUMP(CH7017_LVDS_PLL_VCO_CONTROL);
390 DUMP(CH7017_LVDS_PLL_FEEDBACK_DIV);
391 DUMP(CH7017_LVDS_CONTROL_2);
392 DUMP(CH7017_OUTPUTS_ENABLE);
393 DUMP(CH7017_LVDS_POWER_DOWN);
394 }
395
ch7017_destroy(struct intel_dvo_device * dvo)396 static void ch7017_destroy(struct intel_dvo_device *dvo)
397 {
398 struct ch7017_priv *priv = dvo->dev_priv;
399
400 if (priv) {
401 kfree(priv);
402 dvo->dev_priv = NULL;
403 }
404 }
405
406 const struct intel_dvo_dev_ops ch7017_ops = {
407 .init = ch7017_init,
408 .detect = ch7017_detect,
409 .mode_valid = ch7017_mode_valid,
410 .mode_set = ch7017_mode_set,
411 .dpms = ch7017_dpms,
412 .get_hw_state = ch7017_get_hw_state,
413 .dump_regs = ch7017_dump_regs,
414 .destroy = ch7017_destroy,
415 };
416