drm/i915: paper over missed irq issues with force wake voodoo
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / gpu / drm / i915 / dvo_tfp410.c
blobaa2cd3ec54aa97d59bd736d67591048ad2da56a5
1 /*
2 * Copyright © 2007 Dave Mueller
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:
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.
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 DEALINGS
21 * IN THE SOFTWARE.
23 * Authors:
24 * Dave Mueller <dave.mueller@gmx.ch>
28 #include "dvo.h"
30 /* register definitions according to the TFP410 data sheet */
31 #define TFP410_VID 0x014C
32 #define TFP410_DID 0x0410
34 #define TFP410_VID_LO 0x00
35 #define TFP410_VID_HI 0x01
36 #define TFP410_DID_LO 0x02
37 #define TFP410_DID_HI 0x03
38 #define TFP410_REV 0x04
40 #define TFP410_CTL_1 0x08
41 #define TFP410_CTL_1_TDIS (1<<6)
42 #define TFP410_CTL_1_VEN (1<<5)
43 #define TFP410_CTL_1_HEN (1<<4)
44 #define TFP410_CTL_1_DSEL (1<<3)
45 #define TFP410_CTL_1_BSEL (1<<2)
46 #define TFP410_CTL_1_EDGE (1<<1)
47 #define TFP410_CTL_1_PD (1<<0)
49 #define TFP410_CTL_2 0x09
50 #define TFP410_CTL_2_VLOW (1<<7)
51 #define TFP410_CTL_2_MSEL_MASK (0x7<<4)
52 #define TFP410_CTL_2_MSEL (1<<4)
53 #define TFP410_CTL_2_TSEL (1<<3)
54 #define TFP410_CTL_2_RSEN (1<<2)
55 #define TFP410_CTL_2_HTPLG (1<<1)
56 #define TFP410_CTL_2_MDI (1<<0)
58 #define TFP410_CTL_3 0x0A
59 #define TFP410_CTL_3_DK_MASK (0x7<<5)
60 #define TFP410_CTL_3_DK (1<<5)
61 #define TFP410_CTL_3_DKEN (1<<4)
62 #define TFP410_CTL_3_CTL_MASK (0x7<<1)
63 #define TFP410_CTL_3_CTL (1<<1)
65 #define TFP410_USERCFG 0x0B
67 #define TFP410_DE_DLY 0x32
69 #define TFP410_DE_CTL 0x33
70 #define TFP410_DE_CTL_DEGEN (1<<6)
71 #define TFP410_DE_CTL_VSPOL (1<<5)
72 #define TFP410_DE_CTL_HSPOL (1<<4)
73 #define TFP410_DE_CTL_DEDLY8 (1<<0)
75 #define TFP410_DE_TOP 0x34
77 #define TFP410_DE_CNT_LO 0x36
78 #define TFP410_DE_CNT_HI 0x37
80 #define TFP410_DE_LIN_LO 0x38
81 #define TFP410_DE_LIN_HI 0x39
83 #define TFP410_H_RES_LO 0x3A
84 #define TFP410_H_RES_HI 0x3B
86 #define TFP410_V_RES_LO 0x3C
87 #define TFP410_V_RES_HI 0x3D
89 struct tfp410_priv {
90 bool quiet;
93 static bool tfp410_readb(struct intel_dvo_device *dvo, int addr, uint8_t *ch)
95 struct tfp410_priv *tfp = dvo->dev_priv;
96 struct i2c_adapter *adapter = dvo->i2c_bus;
97 u8 out_buf[2];
98 u8 in_buf[2];
100 struct i2c_msg msgs[] = {
102 .addr = dvo->slave_addr,
103 .flags = 0,
104 .len = 1,
105 .buf = out_buf,
108 .addr = dvo->slave_addr,
109 .flags = I2C_M_RD,
110 .len = 1,
111 .buf = in_buf,
115 out_buf[0] = addr;
116 out_buf[1] = 0;
118 if (i2c_transfer(adapter, msgs, 2) == 2) {
119 *ch = in_buf[0];
120 return true;
123 if (!tfp->quiet) {
124 DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n",
125 addr, adapter->name, dvo->slave_addr);
127 return false;
130 static bool tfp410_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch)
132 struct tfp410_priv *tfp = dvo->dev_priv;
133 struct i2c_adapter *adapter = dvo->i2c_bus;
134 uint8_t out_buf[2];
135 struct i2c_msg msg = {
136 .addr = dvo->slave_addr,
137 .flags = 0,
138 .len = 2,
139 .buf = out_buf,
142 out_buf[0] = addr;
143 out_buf[1] = ch;
145 if (i2c_transfer(adapter, &msg, 1) == 1)
146 return true;
148 if (!tfp->quiet) {
149 DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n",
150 addr, adapter->name, dvo->slave_addr);
153 return false;
156 static int tfp410_getid(struct intel_dvo_device *dvo, int addr)
158 uint8_t ch1, ch2;
160 if (tfp410_readb(dvo, addr+0, &ch1) &&
161 tfp410_readb(dvo, addr+1, &ch2))
162 return ((ch2 << 8) & 0xFF00) | (ch1 & 0x00FF);
164 return -1;
167 /* Ti TFP410 driver for chip on i2c bus */
168 static bool tfp410_init(struct intel_dvo_device *dvo,
169 struct i2c_adapter *adapter)
171 /* this will detect the tfp410 chip on the specified i2c bus */
172 struct tfp410_priv *tfp;
173 int id;
175 tfp = kzalloc(sizeof(struct tfp410_priv), GFP_KERNEL);
176 if (tfp == NULL)
177 return false;
179 dvo->i2c_bus = adapter;
180 dvo->dev_priv = tfp;
181 tfp->quiet = true;
183 if ((id = tfp410_getid(dvo, TFP410_VID_LO)) != TFP410_VID) {
184 DRM_DEBUG_KMS("tfp410 not detected got VID %X: from %s "
185 "Slave %d.\n",
186 id, adapter->name, dvo->slave_addr);
187 goto out;
190 if ((id = tfp410_getid(dvo, TFP410_DID_LO)) != TFP410_DID) {
191 DRM_DEBUG_KMS("tfp410 not detected got DID %X: from %s "
192 "Slave %d.\n",
193 id, adapter->name, dvo->slave_addr);
194 goto out;
196 tfp->quiet = false;
197 return true;
198 out:
199 kfree(tfp);
200 return false;
203 static enum drm_connector_status tfp410_detect(struct intel_dvo_device *dvo)
205 enum drm_connector_status ret = connector_status_disconnected;
206 uint8_t ctl2;
208 if (tfp410_readb(dvo, TFP410_CTL_2, &ctl2)) {
209 if (ctl2 & TFP410_CTL_2_RSEN)
210 ret = connector_status_connected;
211 else
212 ret = connector_status_disconnected;
215 return ret;
218 static enum drm_mode_status tfp410_mode_valid(struct intel_dvo_device *dvo,
219 struct drm_display_mode *mode)
221 return MODE_OK;
224 static void tfp410_mode_set(struct intel_dvo_device *dvo,
225 struct drm_display_mode *mode,
226 struct drm_display_mode *adjusted_mode)
228 /* As long as the basics are set up, since we don't have clock dependencies
229 * in the mode setup, we can just leave the registers alone and everything
230 * will work fine.
232 /* don't do much */
233 return;
236 /* set the tfp410 power state */
237 static void tfp410_dpms(struct intel_dvo_device *dvo, int mode)
239 uint8_t ctl1;
241 if (!tfp410_readb(dvo, TFP410_CTL_1, &ctl1))
242 return;
244 if (mode == DRM_MODE_DPMS_ON)
245 ctl1 |= TFP410_CTL_1_PD;
246 else
247 ctl1 &= ~TFP410_CTL_1_PD;
249 tfp410_writeb(dvo, TFP410_CTL_1, ctl1);
252 static void tfp410_dump_regs(struct intel_dvo_device *dvo)
254 uint8_t val, val2;
256 tfp410_readb(dvo, TFP410_REV, &val);
257 DRM_LOG_KMS("TFP410_REV: 0x%02X\n", val);
258 tfp410_readb(dvo, TFP410_CTL_1, &val);
259 DRM_LOG_KMS("TFP410_CTL1: 0x%02X\n", val);
260 tfp410_readb(dvo, TFP410_CTL_2, &val);
261 DRM_LOG_KMS("TFP410_CTL2: 0x%02X\n", val);
262 tfp410_readb(dvo, TFP410_CTL_3, &val);
263 DRM_LOG_KMS("TFP410_CTL3: 0x%02X\n", val);
264 tfp410_readb(dvo, TFP410_USERCFG, &val);
265 DRM_LOG_KMS("TFP410_USERCFG: 0x%02X\n", val);
266 tfp410_readb(dvo, TFP410_DE_DLY, &val);
267 DRM_LOG_KMS("TFP410_DE_DLY: 0x%02X\n", val);
268 tfp410_readb(dvo, TFP410_DE_CTL, &val);
269 DRM_LOG_KMS("TFP410_DE_CTL: 0x%02X\n", val);
270 tfp410_readb(dvo, TFP410_DE_TOP, &val);
271 DRM_LOG_KMS("TFP410_DE_TOP: 0x%02X\n", val);
272 tfp410_readb(dvo, TFP410_DE_CNT_LO, &val);
273 tfp410_readb(dvo, TFP410_DE_CNT_HI, &val2);
274 DRM_LOG_KMS("TFP410_DE_CNT: 0x%02X%02X\n", val2, val);
275 tfp410_readb(dvo, TFP410_DE_LIN_LO, &val);
276 tfp410_readb(dvo, TFP410_DE_LIN_HI, &val2);
277 DRM_LOG_KMS("TFP410_DE_LIN: 0x%02X%02X\n", val2, val);
278 tfp410_readb(dvo, TFP410_H_RES_LO, &val);
279 tfp410_readb(dvo, TFP410_H_RES_HI, &val2);
280 DRM_LOG_KMS("TFP410_H_RES: 0x%02X%02X\n", val2, val);
281 tfp410_readb(dvo, TFP410_V_RES_LO, &val);
282 tfp410_readb(dvo, TFP410_V_RES_HI, &val2);
283 DRM_LOG_KMS("TFP410_V_RES: 0x%02X%02X\n", val2, val);
286 static void tfp410_destroy(struct intel_dvo_device *dvo)
288 struct tfp410_priv *tfp = dvo->dev_priv;
290 if (tfp) {
291 kfree(tfp);
292 dvo->dev_priv = NULL;
296 struct intel_dvo_dev_ops tfp410_ops = {
297 .init = tfp410_init,
298 .detect = tfp410_detect,
299 .mode_valid = tfp410_mode_valid,
300 .mode_set = tfp410_mode_set,
301 .dpms = tfp410_dpms,
302 .dump_regs = tfp410_dump_regs,
303 .destroy = tfp410_destroy,