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dvo_ch7017.c
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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 <[email protected]>
25  *
26  */
27 
28 #include "dvo.h"
29 
30 #define CH7017_TV_DISPLAY_MODE 0x00
31 #define CH7017_FLICKER_FILTER 0x01
32 #define CH7017_VIDEO_BANDWIDTH 0x02
33 #define CH7017_TEXT_ENHANCEMENT 0x03
34 #define CH7017_START_ACTIVE_VIDEO 0x04
35 #define CH7017_HORIZONTAL_POSITION 0x05
36 #define CH7017_VERTICAL_POSITION 0x06
37 #define CH7017_BLACK_LEVEL 0x07
38 #define CH7017_CONTRAST_ENHANCEMENT 0x08
39 #define CH7017_TV_PLL 0x09
40 #define CH7017_TV_PLL_M 0x0a
41 #define CH7017_TV_PLL_N 0x0b
42 #define CH7017_SUB_CARRIER_0 0x0c
43 #define CH7017_CIV_CONTROL 0x10
44 #define CH7017_CIV_0 0x11
45 #define CH7017_CHROMA_BOOST 0x14
46 #define CH7017_CLOCK_MODE 0x1c
47 #define CH7017_INPUT_CLOCK 0x1d
48 #define CH7017_GPIO_CONTROL 0x1e
49 #define CH7017_INPUT_DATA_FORMAT 0x1f
50 #define CH7017_CONNECTION_DETECT 0x20
51 #define CH7017_DAC_CONTROL 0x21
52 #define CH7017_BUFFERED_CLOCK_OUTPUT 0x22
53 #define CH7017_DEFEAT_VSYNC 0x47
54 #define CH7017_TEST_PATTERN 0x48
55 
56 #define CH7017_POWER_MANAGEMENT 0x49
57 
58 #define CH7017_TV_EN (1 << 0)
59 #define CH7017_DAC0_POWER_DOWN (1 << 1)
60 #define CH7017_DAC1_POWER_DOWN (1 << 2)
61 #define CH7017_DAC2_POWER_DOWN (1 << 3)
62 #define CH7017_DAC3_POWER_DOWN (1 << 4)
63 
64 #define CH7017_TV_POWER_DOWN_EN (1 << 5)
65 
66 #define CH7017_VERSION_ID 0x4a
67 
68 #define CH7017_DEVICE_ID 0x4b
69 #define CH7017_DEVICE_ID_VALUE 0x1b
70 #define CH7018_DEVICE_ID_VALUE 0x1a
71 #define CH7019_DEVICE_ID_VALUE 0x19
72 
73 #define CH7017_XCLK_D2_ADJUST 0x53
74 #define CH7017_UP_SCALER_COEFF_0 0x55
75 #define CH7017_UP_SCALER_COEFF_1 0x56
76 #define CH7017_UP_SCALER_COEFF_2 0x57
77 #define CH7017_UP_SCALER_COEFF_3 0x58
78 #define CH7017_UP_SCALER_COEFF_4 0x59
79 #define CH7017_UP_SCALER_VERTICAL_INC_0 0x5a
80 #define CH7017_UP_SCALER_VERTICAL_INC_1 0x5b
81 #define CH7017_GPIO_INVERT 0x5c
82 #define CH7017_UP_SCALER_HORIZONTAL_INC_0 0x5d
83 #define CH7017_UP_SCALER_HORIZONTAL_INC_1 0x5e
84 
85 #define CH7017_HORIZONTAL_ACTIVE_PIXEL_INPUT 0x5f
86 
88 #define CH7017_ACTIVE_INPUT_LINE_OUTPUT 0x60
89 
90 #define CH7017_LVDS_HAP_INPUT_MASK (0x7 << 0)
91 
92 #define CH7017_LVDS_VAL_HIGH_MASK (0x7 << 3)
93 
94 #define CH7017_VERTICAL_ACTIVE_LINE_OUTPUT 0x61
95 
97 #define CH7017_HORIZONTAL_ACTIVE_PIXEL_OUTPUT 0x62
98 
100 #define CH7017_LVDS_POWER_DOWN 0x63
101 
102 #define CH7017_LVDS_HAP_HIGH_MASK (0x7 << 0)
103 
104 #define CH7017_LVDS_POWER_DOWN_EN (1 << 6)
105 
106 #define CH7017_LVDS_UPSCALER_EN (1 << 7)
107 #define CH7017_LVDS_POWER_DOWN_DEFAULT_RESERVED 0x08
108 
109 #define CH7017_LVDS_ENCODING 0x64
110 #define CH7017_LVDS_DITHER_2D (1 << 2)
111 #define CH7017_LVDS_DITHER_DIS (1 << 3)
112 #define CH7017_LVDS_DUAL_CHANNEL_EN (1 << 4)
113 #define CH7017_LVDS_24_BIT (1 << 5)
114 
115 #define CH7017_LVDS_ENCODING_2 0x65
116 
117 #define CH7017_LVDS_PLL_CONTROL 0x66
118 
119 #define CH7017_LVDS_PANEN (1 << 0)
120 
121 #define CH7017_LVDS_BKLEN (1 << 3)
122 
123 #define CH7017_POWER_SEQUENCING_T1 0x67
124 #define CH7017_POWER_SEQUENCING_T2 0x68
125 #define CH7017_POWER_SEQUENCING_T3 0x69
126 #define CH7017_POWER_SEQUENCING_T4 0x6a
127 #define CH7017_POWER_SEQUENCING_T5 0x6b
128 #define CH7017_GPIO_DRIVER_TYPE 0x6c
129 #define CH7017_GPIO_DATA 0x6d
130 #define CH7017_GPIO_DIRECTION_CONTROL 0x6e
131 
132 #define CH7017_LVDS_PLL_FEEDBACK_DIV 0x71
133 # define CH7017_LVDS_PLL_FEED_BACK_DIVIDER_SHIFT 4
134 # define CH7017_LVDS_PLL_FEED_FORWARD_DIVIDER_SHIFT 0
135 # define CH7017_LVDS_PLL_FEEDBACK_DEFAULT_RESERVED 0x80
136 
137 #define CH7017_LVDS_PLL_VCO_CONTROL 0x72
138 # define CH7017_LVDS_PLL_VCO_DEFAULT_RESERVED 0x80
139 # define CH7017_LVDS_PLL_VCO_SHIFT 4
140 # define CH7017_LVDS_PLL_POST_SCALE_DIV_SHIFT 0
141 
142 #define CH7017_OUTPUTS_ENABLE 0x73
143 # define CH7017_CHARGE_PUMP_LOW 0x0
144 # define CH7017_CHARGE_PUMP_HIGH 0x3
145 # define CH7017_LVDS_CHANNEL_A (1 << 3)
146 # define CH7017_LVDS_CHANNEL_B (1 << 4)
147 # define CH7017_TV_DAC_A (1 << 5)
148 # define CH7017_TV_DAC_B (1 << 6)
149 # define CH7017_DDC_SELECT_DC2 (1 << 7)
150 
151 #define CH7017_LVDS_OUTPUT_AMPLITUDE 0x74
152 #define CH7017_LVDS_PLL_EMI_REDUCTION 0x75
153 #define CH7017_LVDS_POWER_DOWN_FLICKER 0x76
154 
155 #define CH7017_LVDS_CONTROL_2 0x78
156 # define CH7017_LOOP_FILTER_SHIFT 5
157 # define CH7017_PHASE_DETECTOR_SHIFT 0
158 
159 #define CH7017_BANG_LIMIT_CONTROL 0x7f
160 
161 struct ch7017_priv {
163 };
164 
165 static void ch7017_dump_regs(struct intel_dvo_device *dvo);
166 static void ch7017_dpms(struct intel_dvo_device *dvo, bool enable);
167 
168 static bool ch7017_read(struct intel_dvo_device *dvo, u8 addr, u8 *val)
169 {
170  struct i2c_msg msgs[] = {
171  {
172  .addr = dvo->slave_addr,
173  .flags = 0,
174  .len = 1,
175  .buf = &addr,
176  },
177  {
178  .addr = dvo->slave_addr,
179  .flags = I2C_M_RD,
180  .len = 1,
181  .buf = val,
182  }
183  };
184  return i2c_transfer(dvo->i2c_bus, msgs, 2) == 2;
185 }
186 
187 static bool ch7017_write(struct intel_dvo_device *dvo, u8 addr, u8 val)
188 {
189  uint8_t buf[2] = { addr, val };
190  struct i2c_msg msg = {
191  .addr = dvo->slave_addr,
192  .flags = 0,
193  .len = 2,
194  .buf = buf,
195  };
196  return i2c_transfer(dvo->i2c_bus, &msg, 1) == 1;
197 }
198 
200 static bool ch7017_init(struct intel_dvo_device *dvo,
201  struct i2c_adapter *adapter)
202 {
203  struct ch7017_priv *priv;
204  const char *str;
205  u8 val;
206 
207  priv = kzalloc(sizeof(struct ch7017_priv), GFP_KERNEL);
208  if (priv == NULL)
209  return false;
210 
211  dvo->i2c_bus = adapter;
212  dvo->dev_priv = priv;
213 
214  if (!ch7017_read(dvo, CH7017_DEVICE_ID, &val))
215  goto fail;
216 
217  switch (val) {
219  str = "ch7017";
220  break;
222  str = "ch7018";
223  break;
225  str = "ch7019";
226  break;
227  default:
228  DRM_DEBUG_KMS("ch701x not detected, got %d: from %s "
229  "slave %d.\n",
230  val, adapter->name, dvo->slave_addr);
231  goto fail;
232  }
233 
234  DRM_DEBUG_KMS("%s detected on %s, addr %d\n",
235  str, adapter->name, dvo->slave_addr);
236  return true;
237 
238 fail:
239  kfree(priv);
240  return false;
241 }
242 
243 static enum drm_connector_status ch7017_detect(struct intel_dvo_device *dvo)
244 {
246 }
247 
248 static enum drm_mode_status ch7017_mode_valid(struct intel_dvo_device *dvo,
249  struct drm_display_mode *mode)
250 {
251  if (mode->clock > 160000)
252  return MODE_CLOCK_HIGH;
253 
254  return MODE_OK;
255 }
256 
257 static void ch7017_mode_set(struct intel_dvo_device *dvo,
258  struct drm_display_mode *mode,
259  struct drm_display_mode *adjusted_mode)
260 {
261  uint8_t lvds_pll_feedback_div, lvds_pll_vco_control;
262  uint8_t outputs_enable, lvds_control_2, lvds_power_down;
263  uint8_t horizontal_active_pixel_input;
264  uint8_t horizontal_active_pixel_output, vertical_active_line_output;
265  uint8_t active_input_line_output;
266 
267  DRM_DEBUG_KMS("Registers before mode setting\n");
268  ch7017_dump_regs(dvo);
269 
270  /* LVDS PLL settings from page 75 of 7017-7017ds.pdf*/
271  if (mode->clock < 100000) {
273  lvds_pll_feedback_div = CH7017_LVDS_PLL_FEEDBACK_DEFAULT_RESERVED |
276  lvds_pll_vco_control = CH7017_LVDS_PLL_VCO_DEFAULT_RESERVED |
279  lvds_control_2 = (1 << CH7017_LOOP_FILTER_SHIFT) |
281  } else {
283  lvds_pll_feedback_div = CH7017_LVDS_PLL_FEEDBACK_DEFAULT_RESERVED |
286  lvds_pll_feedback_div = 35;
287  lvds_control_2 = (3 << CH7017_LOOP_FILTER_SHIFT) |
289  if (1) { /* XXX: dual channel panel detection. Assume yes for now. */
290  outputs_enable |= CH7017_LVDS_CHANNEL_B;
291  lvds_pll_vco_control = CH7017_LVDS_PLL_VCO_DEFAULT_RESERVED |
294  } else {
295  lvds_pll_vco_control = CH7017_LVDS_PLL_VCO_DEFAULT_RESERVED |
298  }
299  }
300 
301  horizontal_active_pixel_input = mode->hdisplay & 0x00ff;
302 
303  vertical_active_line_output = mode->vdisplay & 0x00ff;
304  horizontal_active_pixel_output = mode->hdisplay & 0x00ff;
305 
306  active_input_line_output = ((mode->hdisplay & 0x0700) >> 8) |
307  (((mode->vdisplay & 0x0700) >> 8) << 3);
308 
309  lvds_power_down = CH7017_LVDS_POWER_DOWN_DEFAULT_RESERVED |
310  (mode->hdisplay & 0x0700) >> 8;
311 
312  ch7017_dpms(dvo, false);
313  ch7017_write(dvo, CH7017_HORIZONTAL_ACTIVE_PIXEL_INPUT,
314  horizontal_active_pixel_input);
315  ch7017_write(dvo, CH7017_HORIZONTAL_ACTIVE_PIXEL_OUTPUT,
316  horizontal_active_pixel_output);
317  ch7017_write(dvo, CH7017_VERTICAL_ACTIVE_LINE_OUTPUT,
318  vertical_active_line_output);
319  ch7017_write(dvo, CH7017_ACTIVE_INPUT_LINE_OUTPUT,
320  active_input_line_output);
321  ch7017_write(dvo, CH7017_LVDS_PLL_VCO_CONTROL, lvds_pll_vco_control);
322  ch7017_write(dvo, CH7017_LVDS_PLL_FEEDBACK_DIV, lvds_pll_feedback_div);
323  ch7017_write(dvo, CH7017_LVDS_CONTROL_2, lvds_control_2);
324  ch7017_write(dvo, CH7017_OUTPUTS_ENABLE, outputs_enable);
325 
326  /* Turn the LVDS back on with new settings. */
327  ch7017_write(dvo, CH7017_LVDS_POWER_DOWN, lvds_power_down);
328 
329  DRM_DEBUG_KMS("Registers after mode setting\n");
330  ch7017_dump_regs(dvo);
331 }
332 
333 /* set the CH7017 power state */
334 static void ch7017_dpms(struct intel_dvo_device *dvo, bool enable)
335 {
336  uint8_t val;
337 
338  ch7017_read(dvo, CH7017_LVDS_POWER_DOWN, &val);
339 
340  /* Turn off TV/VGA, and never turn it on since we don't support it. */
341  ch7017_write(dvo, CH7017_POWER_MANAGEMENT,
347 
348  if (enable) {
349  /* Turn on the LVDS */
350  ch7017_write(dvo, CH7017_LVDS_POWER_DOWN,
352  } else {
353  /* Turn off the LVDS */
354  ch7017_write(dvo, CH7017_LVDS_POWER_DOWN,
356  }
357 
358  /* XXX: Should actually wait for update power status somehow */
359  msleep(20);
360 }
361 
362 static bool ch7017_get_hw_state(struct intel_dvo_device *dvo)
363 {
364  uint8_t val;
365 
366  ch7017_read(dvo, CH7017_LVDS_POWER_DOWN, &val);
367 
368  if (val & CH7017_LVDS_POWER_DOWN_EN)
369  return false;
370  else
371  return true;
372 }
373 
374 static void ch7017_dump_regs(struct intel_dvo_device *dvo)
375 {
376  uint8_t val;
377 
378 #define DUMP(reg) \
379 do { \
380  ch7017_read(dvo, reg, &val); \
381  DRM_DEBUG_KMS(#reg ": %02x\n", val); \
382 } while (0)
383 
393 }
394 
395 static void ch7017_destroy(struct intel_dvo_device *dvo)
396 {
397  struct ch7017_priv *priv = dvo->dev_priv;
398 
399  if (priv) {
400  kfree(priv);
401  dvo->dev_priv = NULL;
402  }
403 }
404 
406  .init = ch7017_init,
407  .detect = ch7017_detect,
408  .mode_valid = ch7017_mode_valid,
409  .mode_set = ch7017_mode_set,
410  .dpms = ch7017_dpms,
411  .get_hw_state = ch7017_get_hw_state,
412  .dump_regs = ch7017_dump_regs,
413  .destroy = ch7017_destroy,
414 };