Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
[linux-2.6.git] / drivers / gpu / drm / i915 / intel_display.c
1 /*
2  * Copyright © 2006-2007 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 #include <linux/i2c.h>
28 #include "drmP.h"
29 #include "intel_drv.h"
30 #include "i915_drm.h"
31 #include "i915_drv.h"
32
33 #include "drm_crtc_helper.h"
34
35 bool intel_pipe_has_type (struct drm_crtc *crtc, int type);
36
37 typedef struct {
38     /* given values */
39     int n;
40     int m1, m2;
41     int p1, p2;
42     /* derived values */
43     int dot;
44     int vco;
45     int m;
46     int p;
47 } intel_clock_t;
48
49 typedef struct {
50     int min, max;
51 } intel_range_t;
52
53 typedef struct {
54     int dot_limit;
55     int p2_slow, p2_fast;
56 } intel_p2_t;
57
58 #define INTEL_P2_NUM                  2
59 typedef struct intel_limit intel_limit_t;
60 struct intel_limit {
61     intel_range_t   dot, vco, n, m, m1, m2, p, p1;
62     intel_p2_t      p2;
63     bool (* find_pll)(const intel_limit_t *, struct drm_crtc *,
64                       int, int, intel_clock_t *);
65 };
66
67 #define I8XX_DOT_MIN              25000
68 #define I8XX_DOT_MAX             350000
69 #define I8XX_VCO_MIN             930000
70 #define I8XX_VCO_MAX            1400000
71 #define I8XX_N_MIN                    3
72 #define I8XX_N_MAX                   16
73 #define I8XX_M_MIN                   96
74 #define I8XX_M_MAX                  140
75 #define I8XX_M1_MIN                  18
76 #define I8XX_M1_MAX                  26
77 #define I8XX_M2_MIN                   6
78 #define I8XX_M2_MAX                  16
79 #define I8XX_P_MIN                    4
80 #define I8XX_P_MAX                  128
81 #define I8XX_P1_MIN                   2
82 #define I8XX_P1_MAX                  33
83 #define I8XX_P1_LVDS_MIN              1
84 #define I8XX_P1_LVDS_MAX              6
85 #define I8XX_P2_SLOW                  4
86 #define I8XX_P2_FAST                  2
87 #define I8XX_P2_LVDS_SLOW             14
88 #define I8XX_P2_LVDS_FAST             14 /* No fast option */
89 #define I8XX_P2_SLOW_LIMIT       165000
90
91 #define I9XX_DOT_MIN              20000
92 #define I9XX_DOT_MAX             400000
93 #define I9XX_VCO_MIN            1400000
94 #define I9XX_VCO_MAX            2800000
95 #define IGD_VCO_MIN             1700000
96 #define IGD_VCO_MAX             3500000
97 #define I9XX_N_MIN                    1
98 #define I9XX_N_MAX                    6
99 /* IGD's Ncounter is a ring counter */
100 #define IGD_N_MIN                     3
101 #define IGD_N_MAX                     6
102 #define I9XX_M_MIN                   70
103 #define I9XX_M_MAX                  120
104 #define IGD_M_MIN                     2
105 #define IGD_M_MAX                   256
106 #define I9XX_M1_MIN                  10
107 #define I9XX_M1_MAX                  22
108 #define I9XX_M2_MIN                   5
109 #define I9XX_M2_MAX                   9
110 /* IGD M1 is reserved, and must be 0 */
111 #define IGD_M1_MIN                    0
112 #define IGD_M1_MAX                    0
113 #define IGD_M2_MIN                    0
114 #define IGD_M2_MAX                    254
115 #define I9XX_P_SDVO_DAC_MIN           5
116 #define I9XX_P_SDVO_DAC_MAX          80
117 #define I9XX_P_LVDS_MIN               7
118 #define I9XX_P_LVDS_MAX              98
119 #define IGD_P_LVDS_MIN                7
120 #define IGD_P_LVDS_MAX               112
121 #define I9XX_P1_MIN                   1
122 #define I9XX_P1_MAX                   8
123 #define I9XX_P2_SDVO_DAC_SLOW                10
124 #define I9XX_P2_SDVO_DAC_FAST                 5
125 #define I9XX_P2_SDVO_DAC_SLOW_LIMIT      200000
126 #define I9XX_P2_LVDS_SLOW                    14
127 #define I9XX_P2_LVDS_FAST                     7
128 #define I9XX_P2_LVDS_SLOW_LIMIT          112000
129
130 #define INTEL_LIMIT_I8XX_DVO_DAC    0
131 #define INTEL_LIMIT_I8XX_LVDS       1
132 #define INTEL_LIMIT_I9XX_SDVO_DAC   2
133 #define INTEL_LIMIT_I9XX_LVDS       3
134 #define INTEL_LIMIT_G4X_SDVO        4
135 #define INTEL_LIMIT_G4X_HDMI_DAC   5
136 #define INTEL_LIMIT_G4X_SINGLE_CHANNEL_LVDS   6
137 #define INTEL_LIMIT_G4X_DUAL_CHANNEL_LVDS   7
138 #define INTEL_LIMIT_IGD_SDVO_DAC    8
139 #define INTEL_LIMIT_IGD_LVDS        9
140
141 /*The parameter is for SDVO on G4x platform*/
142 #define G4X_DOT_SDVO_MIN           25000
143 #define G4X_DOT_SDVO_MAX           270000
144 #define G4X_VCO_MIN                1750000
145 #define G4X_VCO_MAX                3500000
146 #define G4X_N_SDVO_MIN             1
147 #define G4X_N_SDVO_MAX             4
148 #define G4X_M_SDVO_MIN             104
149 #define G4X_M_SDVO_MAX             138
150 #define G4X_M1_SDVO_MIN            17
151 #define G4X_M1_SDVO_MAX            23
152 #define G4X_M2_SDVO_MIN            5
153 #define G4X_M2_SDVO_MAX            11
154 #define G4X_P_SDVO_MIN             10
155 #define G4X_P_SDVO_MAX             30
156 #define G4X_P1_SDVO_MIN            1
157 #define G4X_P1_SDVO_MAX            3
158 #define G4X_P2_SDVO_SLOW           10
159 #define G4X_P2_SDVO_FAST           10
160 #define G4X_P2_SDVO_LIMIT          270000
161
162 /*The parameter is for HDMI_DAC on G4x platform*/
163 #define G4X_DOT_HDMI_DAC_MIN           22000
164 #define G4X_DOT_HDMI_DAC_MAX           400000
165 #define G4X_N_HDMI_DAC_MIN             1
166 #define G4X_N_HDMI_DAC_MAX             4
167 #define G4X_M_HDMI_DAC_MIN             104
168 #define G4X_M_HDMI_DAC_MAX             138
169 #define G4X_M1_HDMI_DAC_MIN            16
170 #define G4X_M1_HDMI_DAC_MAX            23
171 #define G4X_M2_HDMI_DAC_MIN            5
172 #define G4X_M2_HDMI_DAC_MAX            11
173 #define G4X_P_HDMI_DAC_MIN             5
174 #define G4X_P_HDMI_DAC_MAX             80
175 #define G4X_P1_HDMI_DAC_MIN            1
176 #define G4X_P1_HDMI_DAC_MAX            8
177 #define G4X_P2_HDMI_DAC_SLOW           10
178 #define G4X_P2_HDMI_DAC_FAST           5
179 #define G4X_P2_HDMI_DAC_LIMIT          165000
180
181 /*The parameter is for SINGLE_CHANNEL_LVDS on G4x platform*/
182 #define G4X_DOT_SINGLE_CHANNEL_LVDS_MIN           20000
183 #define G4X_DOT_SINGLE_CHANNEL_LVDS_MAX           115000
184 #define G4X_N_SINGLE_CHANNEL_LVDS_MIN             1
185 #define G4X_N_SINGLE_CHANNEL_LVDS_MAX             3
186 #define G4X_M_SINGLE_CHANNEL_LVDS_MIN             104
187 #define G4X_M_SINGLE_CHANNEL_LVDS_MAX             138
188 #define G4X_M1_SINGLE_CHANNEL_LVDS_MIN            17
189 #define G4X_M1_SINGLE_CHANNEL_LVDS_MAX            23
190 #define G4X_M2_SINGLE_CHANNEL_LVDS_MIN            5
191 #define G4X_M2_SINGLE_CHANNEL_LVDS_MAX            11
192 #define G4X_P_SINGLE_CHANNEL_LVDS_MIN             28
193 #define G4X_P_SINGLE_CHANNEL_LVDS_MAX             112
194 #define G4X_P1_SINGLE_CHANNEL_LVDS_MIN            2
195 #define G4X_P1_SINGLE_CHANNEL_LVDS_MAX            8
196 #define G4X_P2_SINGLE_CHANNEL_LVDS_SLOW           14
197 #define G4X_P2_SINGLE_CHANNEL_LVDS_FAST           14
198 #define G4X_P2_SINGLE_CHANNEL_LVDS_LIMIT          0
199
200 /*The parameter is for DUAL_CHANNEL_LVDS on G4x platform*/
201 #define G4X_DOT_DUAL_CHANNEL_LVDS_MIN           80000
202 #define G4X_DOT_DUAL_CHANNEL_LVDS_MAX           224000
203 #define G4X_N_DUAL_CHANNEL_LVDS_MIN             1
204 #define G4X_N_DUAL_CHANNEL_LVDS_MAX             3
205 #define G4X_M_DUAL_CHANNEL_LVDS_MIN             104
206 #define G4X_M_DUAL_CHANNEL_LVDS_MAX             138
207 #define G4X_M1_DUAL_CHANNEL_LVDS_MIN            17
208 #define G4X_M1_DUAL_CHANNEL_LVDS_MAX            23
209 #define G4X_M2_DUAL_CHANNEL_LVDS_MIN            5
210 #define G4X_M2_DUAL_CHANNEL_LVDS_MAX            11
211 #define G4X_P_DUAL_CHANNEL_LVDS_MIN             14
212 #define G4X_P_DUAL_CHANNEL_LVDS_MAX             42
213 #define G4X_P1_DUAL_CHANNEL_LVDS_MIN            2
214 #define G4X_P1_DUAL_CHANNEL_LVDS_MAX            6
215 #define G4X_P2_DUAL_CHANNEL_LVDS_SLOW           7
216 #define G4X_P2_DUAL_CHANNEL_LVDS_FAST           7
217 #define G4X_P2_DUAL_CHANNEL_LVDS_LIMIT          0
218
219 static bool
220 intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
221                     int target, int refclk, intel_clock_t *best_clock);
222 static bool
223 intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
224                         int target, int refclk, intel_clock_t *best_clock);
225
226 static const intel_limit_t intel_limits[] = {
227     { /* INTEL_LIMIT_I8XX_DVO_DAC */
228         .dot = { .min = I8XX_DOT_MIN,           .max = I8XX_DOT_MAX },
229         .vco = { .min = I8XX_VCO_MIN,           .max = I8XX_VCO_MAX },
230         .n   = { .min = I8XX_N_MIN,             .max = I8XX_N_MAX },
231         .m   = { .min = I8XX_M_MIN,             .max = I8XX_M_MAX },
232         .m1  = { .min = I8XX_M1_MIN,            .max = I8XX_M1_MAX },
233         .m2  = { .min = I8XX_M2_MIN,            .max = I8XX_M2_MAX },
234         .p   = { .min = I8XX_P_MIN,             .max = I8XX_P_MAX },
235         .p1  = { .min = I8XX_P1_MIN,            .max = I8XX_P1_MAX },
236         .p2  = { .dot_limit = I8XX_P2_SLOW_LIMIT,
237                  .p2_slow = I8XX_P2_SLOW,       .p2_fast = I8XX_P2_FAST },
238         .find_pll = intel_find_best_PLL,
239     },
240     { /* INTEL_LIMIT_I8XX_LVDS */
241         .dot = { .min = I8XX_DOT_MIN,           .max = I8XX_DOT_MAX },
242         .vco = { .min = I8XX_VCO_MIN,           .max = I8XX_VCO_MAX },
243         .n   = { .min = I8XX_N_MIN,             .max = I8XX_N_MAX },
244         .m   = { .min = I8XX_M_MIN,             .max = I8XX_M_MAX },
245         .m1  = { .min = I8XX_M1_MIN,            .max = I8XX_M1_MAX },
246         .m2  = { .min = I8XX_M2_MIN,            .max = I8XX_M2_MAX },
247         .p   = { .min = I8XX_P_MIN,             .max = I8XX_P_MAX },
248         .p1  = { .min = I8XX_P1_LVDS_MIN,       .max = I8XX_P1_LVDS_MAX },
249         .p2  = { .dot_limit = I8XX_P2_SLOW_LIMIT,
250                  .p2_slow = I8XX_P2_LVDS_SLOW,  .p2_fast = I8XX_P2_LVDS_FAST },
251         .find_pll = intel_find_best_PLL,
252     },
253     { /* INTEL_LIMIT_I9XX_SDVO_DAC */
254         .dot = { .min = I9XX_DOT_MIN,           .max = I9XX_DOT_MAX },
255         .vco = { .min = I9XX_VCO_MIN,           .max = I9XX_VCO_MAX },
256         .n   = { .min = I9XX_N_MIN,             .max = I9XX_N_MAX },
257         .m   = { .min = I9XX_M_MIN,             .max = I9XX_M_MAX },
258         .m1  = { .min = I9XX_M1_MIN,            .max = I9XX_M1_MAX },
259         .m2  = { .min = I9XX_M2_MIN,            .max = I9XX_M2_MAX },
260         .p   = { .min = I9XX_P_SDVO_DAC_MIN,    .max = I9XX_P_SDVO_DAC_MAX },
261         .p1  = { .min = I9XX_P1_MIN,            .max = I9XX_P1_MAX },
262         .p2  = { .dot_limit = I9XX_P2_SDVO_DAC_SLOW_LIMIT,
263                  .p2_slow = I9XX_P2_SDVO_DAC_SLOW,      .p2_fast = I9XX_P2_SDVO_DAC_FAST },
264         .find_pll = intel_find_best_PLL,
265     },
266     { /* INTEL_LIMIT_I9XX_LVDS */
267         .dot = { .min = I9XX_DOT_MIN,           .max = I9XX_DOT_MAX },
268         .vco = { .min = I9XX_VCO_MIN,           .max = I9XX_VCO_MAX },
269         .n   = { .min = I9XX_N_MIN,             .max = I9XX_N_MAX },
270         .m   = { .min = I9XX_M_MIN,             .max = I9XX_M_MAX },
271         .m1  = { .min = I9XX_M1_MIN,            .max = I9XX_M1_MAX },
272         .m2  = { .min = I9XX_M2_MIN,            .max = I9XX_M2_MAX },
273         .p   = { .min = I9XX_P_LVDS_MIN,        .max = I9XX_P_LVDS_MAX },
274         .p1  = { .min = I9XX_P1_MIN,            .max = I9XX_P1_MAX },
275         /* The single-channel range is 25-112Mhz, and dual-channel
276          * is 80-224Mhz.  Prefer single channel as much as possible.
277          */
278         .p2  = { .dot_limit = I9XX_P2_LVDS_SLOW_LIMIT,
279                  .p2_slow = I9XX_P2_LVDS_SLOW,  .p2_fast = I9XX_P2_LVDS_FAST },
280         .find_pll = intel_find_best_PLL,
281     },
282     /* below parameter and function is for G4X Chipset Family*/
283     { /* INTEL_LIMIT_G4X_SDVO */
284         .dot = { .min = G4X_DOT_SDVO_MIN,       .max = G4X_DOT_SDVO_MAX },
285         .vco = { .min = G4X_VCO_MIN,            .max = G4X_VCO_MAX},
286         .n   = { .min = G4X_N_SDVO_MIN,         .max = G4X_N_SDVO_MAX },
287         .m   = { .min = G4X_M_SDVO_MIN,         .max = G4X_M_SDVO_MAX },
288         .m1  = { .min = G4X_M1_SDVO_MIN,        .max = G4X_M1_SDVO_MAX },
289         .m2  = { .min = G4X_M2_SDVO_MIN,        .max = G4X_M2_SDVO_MAX },
290         .p   = { .min = G4X_P_SDVO_MIN,         .max = G4X_P_SDVO_MAX },
291         .p1  = { .min = G4X_P1_SDVO_MIN,        .max = G4X_P1_SDVO_MAX},
292         .p2  = { .dot_limit = G4X_P2_SDVO_LIMIT,
293                  .p2_slow = G4X_P2_SDVO_SLOW,
294                  .p2_fast = G4X_P2_SDVO_FAST
295         },
296         .find_pll = intel_g4x_find_best_PLL,
297     },
298     { /* INTEL_LIMIT_G4X_HDMI_DAC */
299         .dot = { .min = G4X_DOT_HDMI_DAC_MIN,   .max = G4X_DOT_HDMI_DAC_MAX },
300         .vco = { .min = G4X_VCO_MIN,            .max = G4X_VCO_MAX},
301         .n   = { .min = G4X_N_HDMI_DAC_MIN,     .max = G4X_N_HDMI_DAC_MAX },
302         .m   = { .min = G4X_M_HDMI_DAC_MIN,     .max = G4X_M_HDMI_DAC_MAX },
303         .m1  = { .min = G4X_M1_HDMI_DAC_MIN,    .max = G4X_M1_HDMI_DAC_MAX },
304         .m2  = { .min = G4X_M2_HDMI_DAC_MIN,    .max = G4X_M2_HDMI_DAC_MAX },
305         .p   = { .min = G4X_P_HDMI_DAC_MIN,     .max = G4X_P_HDMI_DAC_MAX },
306         .p1  = { .min = G4X_P1_HDMI_DAC_MIN,    .max = G4X_P1_HDMI_DAC_MAX},
307         .p2  = { .dot_limit = G4X_P2_HDMI_DAC_LIMIT,
308                  .p2_slow = G4X_P2_HDMI_DAC_SLOW,
309                  .p2_fast = G4X_P2_HDMI_DAC_FAST
310         },
311         .find_pll = intel_g4x_find_best_PLL,
312     },
313     { /* INTEL_LIMIT_G4X_SINGLE_CHANNEL_LVDS */
314         .dot = { .min = G4X_DOT_SINGLE_CHANNEL_LVDS_MIN,
315                  .max = G4X_DOT_SINGLE_CHANNEL_LVDS_MAX },
316         .vco = { .min = G4X_VCO_MIN,
317                  .max = G4X_VCO_MAX },
318         .n   = { .min = G4X_N_SINGLE_CHANNEL_LVDS_MIN,
319                  .max = G4X_N_SINGLE_CHANNEL_LVDS_MAX },
320         .m   = { .min = G4X_M_SINGLE_CHANNEL_LVDS_MIN,
321                  .max = G4X_M_SINGLE_CHANNEL_LVDS_MAX },
322         .m1  = { .min = G4X_M1_SINGLE_CHANNEL_LVDS_MIN,
323                  .max = G4X_M1_SINGLE_CHANNEL_LVDS_MAX },
324         .m2  = { .min = G4X_M2_SINGLE_CHANNEL_LVDS_MIN,
325                  .max = G4X_M2_SINGLE_CHANNEL_LVDS_MAX },
326         .p   = { .min = G4X_P_SINGLE_CHANNEL_LVDS_MIN,
327                  .max = G4X_P_SINGLE_CHANNEL_LVDS_MAX },
328         .p1  = { .min = G4X_P1_SINGLE_CHANNEL_LVDS_MIN,
329                  .max = G4X_P1_SINGLE_CHANNEL_LVDS_MAX },
330         .p2  = { .dot_limit = G4X_P2_SINGLE_CHANNEL_LVDS_LIMIT,
331                  .p2_slow = G4X_P2_SINGLE_CHANNEL_LVDS_SLOW,
332                  .p2_fast = G4X_P2_SINGLE_CHANNEL_LVDS_FAST
333         },
334         .find_pll = intel_g4x_find_best_PLL,
335     },
336     { /* INTEL_LIMIT_G4X_DUAL_CHANNEL_LVDS */
337         .dot = { .min = G4X_DOT_DUAL_CHANNEL_LVDS_MIN,
338                  .max = G4X_DOT_DUAL_CHANNEL_LVDS_MAX },
339         .vco = { .min = G4X_VCO_MIN,
340                  .max = G4X_VCO_MAX },
341         .n   = { .min = G4X_N_DUAL_CHANNEL_LVDS_MIN,
342                  .max = G4X_N_DUAL_CHANNEL_LVDS_MAX },
343         .m   = { .min = G4X_M_DUAL_CHANNEL_LVDS_MIN,
344                  .max = G4X_M_DUAL_CHANNEL_LVDS_MAX },
345         .m1  = { .min = G4X_M1_DUAL_CHANNEL_LVDS_MIN,
346                  .max = G4X_M1_DUAL_CHANNEL_LVDS_MAX },
347         .m2  = { .min = G4X_M2_DUAL_CHANNEL_LVDS_MIN,
348                  .max = G4X_M2_DUAL_CHANNEL_LVDS_MAX },
349         .p   = { .min = G4X_P_DUAL_CHANNEL_LVDS_MIN,
350                  .max = G4X_P_DUAL_CHANNEL_LVDS_MAX },
351         .p1  = { .min = G4X_P1_DUAL_CHANNEL_LVDS_MIN,
352                  .max = G4X_P1_DUAL_CHANNEL_LVDS_MAX },
353         .p2  = { .dot_limit = G4X_P2_DUAL_CHANNEL_LVDS_LIMIT,
354                  .p2_slow = G4X_P2_DUAL_CHANNEL_LVDS_SLOW,
355                  .p2_fast = G4X_P2_DUAL_CHANNEL_LVDS_FAST
356         },
357         .find_pll = intel_g4x_find_best_PLL,
358     },
359     { /* INTEL_LIMIT_IGD_SDVO */
360         .dot = { .min = I9XX_DOT_MIN,           .max = I9XX_DOT_MAX},
361         .vco = { .min = IGD_VCO_MIN,            .max = IGD_VCO_MAX },
362         .n   = { .min = IGD_N_MIN,              .max = IGD_N_MAX },
363         .m   = { .min = IGD_M_MIN,              .max = IGD_M_MAX },
364         .m1  = { .min = IGD_M1_MIN,             .max = IGD_M1_MAX },
365         .m2  = { .min = IGD_M2_MIN,             .max = IGD_M2_MAX },
366         .p   = { .min = I9XX_P_SDVO_DAC_MIN,    .max = I9XX_P_SDVO_DAC_MAX },
367         .p1  = { .min = I9XX_P1_MIN,            .max = I9XX_P1_MAX },
368         .p2  = { .dot_limit = I9XX_P2_SDVO_DAC_SLOW_LIMIT,
369                  .p2_slow = I9XX_P2_SDVO_DAC_SLOW,      .p2_fast = I9XX_P2_SDVO_DAC_FAST },
370         .find_pll = intel_find_best_PLL,
371     },
372     { /* INTEL_LIMIT_IGD_LVDS */
373         .dot = { .min = I9XX_DOT_MIN,           .max = I9XX_DOT_MAX },
374         .vco = { .min = IGD_VCO_MIN,            .max = IGD_VCO_MAX },
375         .n   = { .min = IGD_N_MIN,              .max = IGD_N_MAX },
376         .m   = { .min = IGD_M_MIN,              .max = IGD_M_MAX },
377         .m1  = { .min = IGD_M1_MIN,             .max = IGD_M1_MAX },
378         .m2  = { .min = IGD_M2_MIN,             .max = IGD_M2_MAX },
379         .p   = { .min = IGD_P_LVDS_MIN, .max = IGD_P_LVDS_MAX },
380         .p1  = { .min = I9XX_P1_MIN,            .max = I9XX_P1_MAX },
381         /* IGD only supports single-channel mode. */
382         .p2  = { .dot_limit = I9XX_P2_LVDS_SLOW_LIMIT,
383                  .p2_slow = I9XX_P2_LVDS_SLOW,  .p2_fast = I9XX_P2_LVDS_SLOW },
384         .find_pll = intel_find_best_PLL,
385     },
386
387 };
388
389 static const intel_limit_t *intel_g4x_limit(struct drm_crtc *crtc)
390 {
391         struct drm_device *dev = crtc->dev;
392         struct drm_i915_private *dev_priv = dev->dev_private;
393         const intel_limit_t *limit;
394
395         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
396                 if ((I915_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
397                     LVDS_CLKB_POWER_UP)
398                         /* LVDS with dual channel */
399                         limit = &intel_limits
400                                         [INTEL_LIMIT_G4X_DUAL_CHANNEL_LVDS];
401                 else
402                         /* LVDS with dual channel */
403                         limit = &intel_limits
404                                         [INTEL_LIMIT_G4X_SINGLE_CHANNEL_LVDS];
405         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI) ||
406                    intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG)) {
407                 limit = &intel_limits[INTEL_LIMIT_G4X_HDMI_DAC];
408         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO)) {
409                 limit = &intel_limits[INTEL_LIMIT_G4X_SDVO];
410         } else /* The option is for other outputs */
411                 limit = &intel_limits[INTEL_LIMIT_I9XX_SDVO_DAC];
412
413         return limit;
414 }
415
416 static const intel_limit_t *intel_limit(struct drm_crtc *crtc)
417 {
418         struct drm_device *dev = crtc->dev;
419         const intel_limit_t *limit;
420
421         if (IS_G4X(dev)) {
422                 limit = intel_g4x_limit(crtc);
423         } else if (IS_I9XX(dev) && !IS_IGD(dev)) {
424                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
425                         limit = &intel_limits[INTEL_LIMIT_I9XX_LVDS];
426                 else
427                         limit = &intel_limits[INTEL_LIMIT_I9XX_SDVO_DAC];
428         } else if (IS_IGD(dev)) {
429                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
430                         limit = &intel_limits[INTEL_LIMIT_IGD_LVDS];
431                 else
432                         limit = &intel_limits[INTEL_LIMIT_IGD_SDVO_DAC];
433         } else {
434                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
435                         limit = &intel_limits[INTEL_LIMIT_I8XX_LVDS];
436                 else
437                         limit = &intel_limits[INTEL_LIMIT_I8XX_DVO_DAC];
438         }
439         return limit;
440 }
441
442 /* m1 is reserved as 0 in IGD, n is a ring counter */
443 static void igd_clock(int refclk, intel_clock_t *clock)
444 {
445         clock->m = clock->m2 + 2;
446         clock->p = clock->p1 * clock->p2;
447         clock->vco = refclk * clock->m / clock->n;
448         clock->dot = clock->vco / clock->p;
449 }
450
451 static void intel_clock(struct drm_device *dev, int refclk, intel_clock_t *clock)
452 {
453         if (IS_IGD(dev)) {
454                 igd_clock(refclk, clock);
455                 return;
456         }
457         clock->m = 5 * (clock->m1 + 2) + (clock->m2 + 2);
458         clock->p = clock->p1 * clock->p2;
459         clock->vco = refclk * clock->m / (clock->n + 2);
460         clock->dot = clock->vco / clock->p;
461 }
462
463 /**
464  * Returns whether any output on the specified pipe is of the specified type
465  */
466 bool intel_pipe_has_type (struct drm_crtc *crtc, int type)
467 {
468     struct drm_device *dev = crtc->dev;
469     struct drm_mode_config *mode_config = &dev->mode_config;
470     struct drm_connector *l_entry;
471
472     list_for_each_entry(l_entry, &mode_config->connector_list, head) {
473             if (l_entry->encoder &&
474                 l_entry->encoder->crtc == crtc) {
475                     struct intel_output *intel_output = to_intel_output(l_entry);
476                     if (intel_output->type == type)
477                             return true;
478             }
479     }
480     return false;
481 }
482
483 #define INTELPllInvalid(s)   do { /* DRM_DEBUG(s); */ return false; } while (0)
484 /**
485  * Returns whether the given set of divisors are valid for a given refclk with
486  * the given connectors.
487  */
488
489 static bool intel_PLL_is_valid(struct drm_crtc *crtc, intel_clock_t *clock)
490 {
491         const intel_limit_t *limit = intel_limit (crtc);
492         struct drm_device *dev = crtc->dev;
493
494         if (clock->p1  < limit->p1.min  || limit->p1.max  < clock->p1)
495                 INTELPllInvalid ("p1 out of range\n");
496         if (clock->p   < limit->p.min   || limit->p.max   < clock->p)
497                 INTELPllInvalid ("p out of range\n");
498         if (clock->m2  < limit->m2.min  || limit->m2.max  < clock->m2)
499                 INTELPllInvalid ("m2 out of range\n");
500         if (clock->m1  < limit->m1.min  || limit->m1.max  < clock->m1)
501                 INTELPllInvalid ("m1 out of range\n");
502         if (clock->m1 <= clock->m2 && !IS_IGD(dev))
503                 INTELPllInvalid ("m1 <= m2\n");
504         if (clock->m   < limit->m.min   || limit->m.max   < clock->m)
505                 INTELPllInvalid ("m out of range\n");
506         if (clock->n   < limit->n.min   || limit->n.max   < clock->n)
507                 INTELPllInvalid ("n out of range\n");
508         if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
509                 INTELPllInvalid ("vco out of range\n");
510         /* XXX: We may need to be checking "Dot clock" depending on the multiplier,
511          * connector, etc., rather than just a single range.
512          */
513         if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
514                 INTELPllInvalid ("dot out of range\n");
515
516         return true;
517 }
518
519 static bool
520 intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
521                     int target, int refclk, intel_clock_t *best_clock)
522
523 {
524         struct drm_device *dev = crtc->dev;
525         struct drm_i915_private *dev_priv = dev->dev_private;
526         intel_clock_t clock;
527         int err = target;
528
529         if (IS_I9XX(dev) && intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
530             (I915_READ(LVDS) & LVDS_PORT_EN) != 0) {
531                 /*
532                  * For LVDS, if the panel is on, just rely on its current
533                  * settings for dual-channel.  We haven't figured out how to
534                  * reliably set up different single/dual channel state, if we
535                  * even can.
536                  */
537                 if ((I915_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
538                     LVDS_CLKB_POWER_UP)
539                         clock.p2 = limit->p2.p2_fast;
540                 else
541                         clock.p2 = limit->p2.p2_slow;
542         } else {
543                 if (target < limit->p2.dot_limit)
544                         clock.p2 = limit->p2.p2_slow;
545                 else
546                         clock.p2 = limit->p2.p2_fast;
547         }
548
549         memset (best_clock, 0, sizeof (*best_clock));
550
551         for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max; clock.m1++) {
552                 for (clock.m2 = limit->m2.min; clock.m2 <= limit->m2.max; clock.m2++) {
553                         /* m1 is always 0 in IGD */
554                         if (clock.m2 >= clock.m1 && !IS_IGD(dev))
555                                 break;
556                         for (clock.n = limit->n.min; clock.n <= limit->n.max;
557                              clock.n++) {
558                                 for (clock.p1 = limit->p1.min;
559                                      clock.p1 <= limit->p1.max; clock.p1++) {
560                                         int this_err;
561
562                                         intel_clock(dev, refclk, &clock);
563
564                                         if (!intel_PLL_is_valid(crtc, &clock))
565                                                 continue;
566
567                                         this_err = abs(clock.dot - target);
568                                         if (this_err < err) {
569                                                 *best_clock = clock;
570                                                 err = this_err;
571                                         }
572                                 }
573                         }
574                 }
575         }
576
577         return (err != target);
578 }
579
580 static bool
581 intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
582                         int target, int refclk, intel_clock_t *best_clock)
583 {
584         struct drm_device *dev = crtc->dev;
585         struct drm_i915_private *dev_priv = dev->dev_private;
586         intel_clock_t clock;
587         int max_n;
588         bool found;
589         /* approximately equals target * 0.00488 */
590         int err_most = (target >> 8) + (target >> 10);
591         found = false;
592
593         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
594                 if ((I915_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
595                     LVDS_CLKB_POWER_UP)
596                         clock.p2 = limit->p2.p2_fast;
597                 else
598                         clock.p2 = limit->p2.p2_slow;
599         } else {
600                 if (target < limit->p2.dot_limit)
601                         clock.p2 = limit->p2.p2_slow;
602                 else
603                         clock.p2 = limit->p2.p2_fast;
604         }
605
606         memset(best_clock, 0, sizeof(*best_clock));
607         max_n = limit->n.max;
608         /* based on hardware requriment prefer smaller n to precision */
609         for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
610                 /* based on hardware requirment prefere larger m1,m2, p1 */
611                 for (clock.m1 = limit->m1.max;
612                      clock.m1 >= limit->m1.min; clock.m1--) {
613                         for (clock.m2 = limit->m2.max;
614                              clock.m2 >= limit->m2.min; clock.m2--) {
615                                 for (clock.p1 = limit->p1.max;
616                                      clock.p1 >= limit->p1.min; clock.p1--) {
617                                         int this_err;
618
619                                         intel_clock(dev, refclk, &clock);
620                                         if (!intel_PLL_is_valid(crtc, &clock))
621                                                 continue;
622                                         this_err = abs(clock.dot - target) ;
623                                         if (this_err < err_most) {
624                                                 *best_clock = clock;
625                                                 err_most = this_err;
626                                                 max_n = clock.n;
627                                                 found = true;
628                                         }
629                                 }
630                         }
631                 }
632         }
633
634         return found;
635 }
636
637 void
638 intel_wait_for_vblank(struct drm_device *dev)
639 {
640         /* Wait for 20ms, i.e. one cycle at 50hz. */
641         mdelay(20);
642 }
643
644 static int
645 intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
646                     struct drm_framebuffer *old_fb)
647 {
648         struct drm_device *dev = crtc->dev;
649         struct drm_i915_private *dev_priv = dev->dev_private;
650         struct drm_i915_master_private *master_priv;
651         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
652         struct intel_framebuffer *intel_fb;
653         struct drm_i915_gem_object *obj_priv;
654         struct drm_gem_object *obj;
655         int pipe = intel_crtc->pipe;
656         unsigned long Start, Offset;
657         int dspbase = (pipe == 0 ? DSPAADDR : DSPBADDR);
658         int dspsurf = (pipe == 0 ? DSPASURF : DSPBSURF);
659         int dspstride = (pipe == 0) ? DSPASTRIDE : DSPBSTRIDE;
660         int dsptileoff = (pipe == 0 ? DSPATILEOFF : DSPBTILEOFF);
661         int dspcntr_reg = (pipe == 0) ? DSPACNTR : DSPBCNTR;
662         u32 dspcntr, alignment;
663         int ret;
664
665         /* no fb bound */
666         if (!crtc->fb) {
667                 DRM_DEBUG("No FB bound\n");
668                 return 0;
669         }
670
671         switch (pipe) {
672         case 0:
673         case 1:
674                 break;
675         default:
676                 DRM_ERROR("Can't update pipe %d in SAREA\n", pipe);
677                 return -EINVAL;
678         }
679
680         intel_fb = to_intel_framebuffer(crtc->fb);
681         obj = intel_fb->obj;
682         obj_priv = obj->driver_private;
683
684         switch (obj_priv->tiling_mode) {
685         case I915_TILING_NONE:
686                 alignment = 64 * 1024;
687                 break;
688         case I915_TILING_X:
689                 /* pin() will align the object as required by fence */
690                 alignment = 0;
691                 break;
692         case I915_TILING_Y:
693                 /* FIXME: Is this true? */
694                 DRM_ERROR("Y tiled not allowed for scan out buffers\n");
695                 return -EINVAL;
696         default:
697                 BUG();
698         }
699
700         mutex_lock(&dev->struct_mutex);
701         ret = i915_gem_object_pin(intel_fb->obj, alignment);
702         if (ret != 0) {
703                 mutex_unlock(&dev->struct_mutex);
704                 return ret;
705         }
706
707         ret = i915_gem_object_set_to_gtt_domain(intel_fb->obj, 1);
708         if (ret != 0) {
709                 i915_gem_object_unpin(intel_fb->obj);
710                 mutex_unlock(&dev->struct_mutex);
711                 return ret;
712         }
713
714         dspcntr = I915_READ(dspcntr_reg);
715         /* Mask out pixel format bits in case we change it */
716         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
717         switch (crtc->fb->bits_per_pixel) {
718         case 8:
719                 dspcntr |= DISPPLANE_8BPP;
720                 break;
721         case 16:
722                 if (crtc->fb->depth == 15)
723                         dspcntr |= DISPPLANE_15_16BPP;
724                 else
725                         dspcntr |= DISPPLANE_16BPP;
726                 break;
727         case 24:
728         case 32:
729                 dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
730                 break;
731         default:
732                 DRM_ERROR("Unknown color depth\n");
733                 i915_gem_object_unpin(intel_fb->obj);
734                 mutex_unlock(&dev->struct_mutex);
735                 return -EINVAL;
736         }
737         if (IS_I965G(dev)) {
738                 if (obj_priv->tiling_mode != I915_TILING_NONE)
739                         dspcntr |= DISPPLANE_TILED;
740                 else
741                         dspcntr &= ~DISPPLANE_TILED;
742         }
743
744         I915_WRITE(dspcntr_reg, dspcntr);
745
746         Start = obj_priv->gtt_offset;
747         Offset = y * crtc->fb->pitch + x * (crtc->fb->bits_per_pixel / 8);
748
749         DRM_DEBUG("Writing base %08lX %08lX %d %d\n", Start, Offset, x, y);
750         I915_WRITE(dspstride, crtc->fb->pitch);
751         if (IS_I965G(dev)) {
752                 I915_WRITE(dspbase, Offset);
753                 I915_READ(dspbase);
754                 I915_WRITE(dspsurf, Start);
755                 I915_READ(dspsurf);
756                 I915_WRITE(dsptileoff, (y << 16) | x);
757         } else {
758                 I915_WRITE(dspbase, Start + Offset);
759                 I915_READ(dspbase);
760         }
761
762         intel_wait_for_vblank(dev);
763
764         if (old_fb) {
765                 intel_fb = to_intel_framebuffer(old_fb);
766                 i915_gem_object_unpin(intel_fb->obj);
767         }
768         mutex_unlock(&dev->struct_mutex);
769
770         if (!dev->primary->master)
771                 return 0;
772
773         master_priv = dev->primary->master->driver_priv;
774         if (!master_priv->sarea_priv)
775                 return 0;
776
777         if (pipe) {
778                 master_priv->sarea_priv->pipeB_x = x;
779                 master_priv->sarea_priv->pipeB_y = y;
780         } else {
781                 master_priv->sarea_priv->pipeA_x = x;
782                 master_priv->sarea_priv->pipeA_y = y;
783         }
784
785         return 0;
786 }
787
788
789
790 /**
791  * Sets the power management mode of the pipe and plane.
792  *
793  * This code should probably grow support for turning the cursor off and back
794  * on appropriately at the same time as we're turning the pipe off/on.
795  */
796 static void intel_crtc_dpms(struct drm_crtc *crtc, int mode)
797 {
798         struct drm_device *dev = crtc->dev;
799         struct drm_i915_master_private *master_priv;
800         struct drm_i915_private *dev_priv = dev->dev_private;
801         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
802         int pipe = intel_crtc->pipe;
803         int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
804         int dspcntr_reg = (pipe == 0) ? DSPACNTR : DSPBCNTR;
805         int dspbase_reg = (pipe == 0) ? DSPAADDR : DSPBADDR;
806         int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;
807         u32 temp;
808         bool enabled;
809
810         /* XXX: When our outputs are all unaware of DPMS modes other than off
811          * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
812          */
813         switch (mode) {
814         case DRM_MODE_DPMS_ON:
815         case DRM_MODE_DPMS_STANDBY:
816         case DRM_MODE_DPMS_SUSPEND:
817                 /* Enable the DPLL */
818                 temp = I915_READ(dpll_reg);
819                 if ((temp & DPLL_VCO_ENABLE) == 0) {
820                         I915_WRITE(dpll_reg, temp);
821                         I915_READ(dpll_reg);
822                         /* Wait for the clocks to stabilize. */
823                         udelay(150);
824                         I915_WRITE(dpll_reg, temp | DPLL_VCO_ENABLE);
825                         I915_READ(dpll_reg);
826                         /* Wait for the clocks to stabilize. */
827                         udelay(150);
828                         I915_WRITE(dpll_reg, temp | DPLL_VCO_ENABLE);
829                         I915_READ(dpll_reg);
830                         /* Wait for the clocks to stabilize. */
831                         udelay(150);
832                 }
833
834                 /* Enable the pipe */
835                 temp = I915_READ(pipeconf_reg);
836                 if ((temp & PIPEACONF_ENABLE) == 0)
837                         I915_WRITE(pipeconf_reg, temp | PIPEACONF_ENABLE);
838
839                 /* Enable the plane */
840                 temp = I915_READ(dspcntr_reg);
841                 if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
842                         I915_WRITE(dspcntr_reg, temp | DISPLAY_PLANE_ENABLE);
843                         /* Flush the plane changes */
844                         I915_WRITE(dspbase_reg, I915_READ(dspbase_reg));
845                 }
846
847                 intel_crtc_load_lut(crtc);
848
849                 /* Give the overlay scaler a chance to enable if it's on this pipe */
850                 //intel_crtc_dpms_video(crtc, true); TODO
851         break;
852         case DRM_MODE_DPMS_OFF:
853                 /* Give the overlay scaler a chance to disable if it's on this pipe */
854                 //intel_crtc_dpms_video(crtc, FALSE); TODO
855
856                 /* Disable the VGA plane that we never use */
857                 I915_WRITE(VGACNTRL, VGA_DISP_DISABLE);
858
859                 /* Disable display plane */
860                 temp = I915_READ(dspcntr_reg);
861                 if ((temp & DISPLAY_PLANE_ENABLE) != 0) {
862                         I915_WRITE(dspcntr_reg, temp & ~DISPLAY_PLANE_ENABLE);
863                         /* Flush the plane changes */
864                         I915_WRITE(dspbase_reg, I915_READ(dspbase_reg));
865                         I915_READ(dspbase_reg);
866                 }
867
868                 if (!IS_I9XX(dev)) {
869                         /* Wait for vblank for the disable to take effect */
870                         intel_wait_for_vblank(dev);
871                 }
872
873                 /* Next, disable display pipes */
874                 temp = I915_READ(pipeconf_reg);
875                 if ((temp & PIPEACONF_ENABLE) != 0) {
876                         I915_WRITE(pipeconf_reg, temp & ~PIPEACONF_ENABLE);
877                         I915_READ(pipeconf_reg);
878                 }
879
880                 /* Wait for vblank for the disable to take effect. */
881                 intel_wait_for_vblank(dev);
882
883                 temp = I915_READ(dpll_reg);
884                 if ((temp & DPLL_VCO_ENABLE) != 0) {
885                         I915_WRITE(dpll_reg, temp & ~DPLL_VCO_ENABLE);
886                         I915_READ(dpll_reg);
887                 }
888
889                 /* Wait for the clocks to turn off. */
890                 udelay(150);
891                 break;
892         }
893
894         if (!dev->primary->master)
895                 return;
896
897         master_priv = dev->primary->master->driver_priv;
898         if (!master_priv->sarea_priv)
899                 return;
900
901         enabled = crtc->enabled && mode != DRM_MODE_DPMS_OFF;
902
903         switch (pipe) {
904         case 0:
905                 master_priv->sarea_priv->pipeA_w = enabled ? crtc->mode.hdisplay : 0;
906                 master_priv->sarea_priv->pipeA_h = enabled ? crtc->mode.vdisplay : 0;
907                 break;
908         case 1:
909                 master_priv->sarea_priv->pipeB_w = enabled ? crtc->mode.hdisplay : 0;
910                 master_priv->sarea_priv->pipeB_h = enabled ? crtc->mode.vdisplay : 0;
911                 break;
912         default:
913                 DRM_ERROR("Can't update pipe %d in SAREA\n", pipe);
914                 break;
915         }
916
917         intel_crtc->dpms_mode = mode;
918 }
919
920 static void intel_crtc_prepare (struct drm_crtc *crtc)
921 {
922         struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
923         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
924 }
925
926 static void intel_crtc_commit (struct drm_crtc *crtc)
927 {
928         struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
929         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
930 }
931
932 void intel_encoder_prepare (struct drm_encoder *encoder)
933 {
934         struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
935         /* lvds has its own version of prepare see intel_lvds_prepare */
936         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
937 }
938
939 void intel_encoder_commit (struct drm_encoder *encoder)
940 {
941         struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
942         /* lvds has its own version of commit see intel_lvds_commit */
943         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
944 }
945
946 static bool intel_crtc_mode_fixup(struct drm_crtc *crtc,
947                                   struct drm_display_mode *mode,
948                                   struct drm_display_mode *adjusted_mode)
949 {
950         return true;
951 }
952
953
954 /** Returns the core display clock speed for i830 - i945 */
955 static int intel_get_core_clock_speed(struct drm_device *dev)
956 {
957
958         /* Core clock values taken from the published datasheets.
959          * The 830 may go up to 166 Mhz, which we should check.
960          */
961         if (IS_I945G(dev))
962                 return 400000;
963         else if (IS_I915G(dev))
964                 return 333000;
965         else if (IS_I945GM(dev) || IS_845G(dev) || IS_IGDGM(dev))
966                 return 200000;
967         else if (IS_I915GM(dev)) {
968                 u16 gcfgc = 0;
969
970                 pci_read_config_word(dev->pdev, GCFGC, &gcfgc);
971
972                 if (gcfgc & GC_LOW_FREQUENCY_ENABLE)
973                         return 133000;
974                 else {
975                         switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
976                         case GC_DISPLAY_CLOCK_333_MHZ:
977                                 return 333000;
978                         default:
979                         case GC_DISPLAY_CLOCK_190_200_MHZ:
980                                 return 190000;
981                         }
982                 }
983         } else if (IS_I865G(dev))
984                 return 266000;
985         else if (IS_I855(dev)) {
986                 u16 hpllcc = 0;
987                 /* Assume that the hardware is in the high speed state.  This
988                  * should be the default.
989                  */
990                 switch (hpllcc & GC_CLOCK_CONTROL_MASK) {
991                 case GC_CLOCK_133_200:
992                 case GC_CLOCK_100_200:
993                         return 200000;
994                 case GC_CLOCK_166_250:
995                         return 250000;
996                 case GC_CLOCK_100_133:
997                         return 133000;
998                 }
999         } else /* 852, 830 */
1000                 return 133000;
1001
1002         return 0; /* Silence gcc warning */
1003 }
1004
1005
1006 /**
1007  * Return the pipe currently connected to the panel fitter,
1008  * or -1 if the panel fitter is not present or not in use
1009  */
1010 static int intel_panel_fitter_pipe (struct drm_device *dev)
1011 {
1012         struct drm_i915_private *dev_priv = dev->dev_private;
1013         u32  pfit_control;
1014
1015         /* i830 doesn't have a panel fitter */
1016         if (IS_I830(dev))
1017                 return -1;
1018
1019         pfit_control = I915_READ(PFIT_CONTROL);
1020
1021         /* See if the panel fitter is in use */
1022         if ((pfit_control & PFIT_ENABLE) == 0)
1023                 return -1;
1024
1025         /* 965 can place panel fitter on either pipe */
1026         if (IS_I965G(dev))
1027                 return (pfit_control >> 29) & 0x3;
1028
1029         /* older chips can only use pipe 1 */
1030         return 1;
1031 }
1032
1033 static int intel_crtc_mode_set(struct drm_crtc *crtc,
1034                                struct drm_display_mode *mode,
1035                                struct drm_display_mode *adjusted_mode,
1036                                int x, int y,
1037                                struct drm_framebuffer *old_fb)
1038 {
1039         struct drm_device *dev = crtc->dev;
1040         struct drm_i915_private *dev_priv = dev->dev_private;
1041         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1042         int pipe = intel_crtc->pipe;
1043         int fp_reg = (pipe == 0) ? FPA0 : FPB0;
1044         int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
1045         int dpll_md_reg = (intel_crtc->pipe == 0) ? DPLL_A_MD : DPLL_B_MD;
1046         int dspcntr_reg = (pipe == 0) ? DSPACNTR : DSPBCNTR;
1047         int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;
1048         int htot_reg = (pipe == 0) ? HTOTAL_A : HTOTAL_B;
1049         int hblank_reg = (pipe == 0) ? HBLANK_A : HBLANK_B;
1050         int hsync_reg = (pipe == 0) ? HSYNC_A : HSYNC_B;
1051         int vtot_reg = (pipe == 0) ? VTOTAL_A : VTOTAL_B;
1052         int vblank_reg = (pipe == 0) ? VBLANK_A : VBLANK_B;
1053         int vsync_reg = (pipe == 0) ? VSYNC_A : VSYNC_B;
1054         int dspsize_reg = (pipe == 0) ? DSPASIZE : DSPBSIZE;
1055         int dsppos_reg = (pipe == 0) ? DSPAPOS : DSPBPOS;
1056         int pipesrc_reg = (pipe == 0) ? PIPEASRC : PIPEBSRC;
1057         int refclk, num_outputs = 0;
1058         intel_clock_t clock;
1059         u32 dpll = 0, fp = 0, dspcntr, pipeconf;
1060         bool ok, is_sdvo = false, is_dvo = false;
1061         bool is_crt = false, is_lvds = false, is_tv = false;
1062         struct drm_mode_config *mode_config = &dev->mode_config;
1063         struct drm_connector *connector;
1064         const intel_limit_t *limit;
1065         int ret;
1066
1067         drm_vblank_pre_modeset(dev, pipe);
1068
1069         list_for_each_entry(connector, &mode_config->connector_list, head) {
1070                 struct intel_output *intel_output = to_intel_output(connector);
1071
1072                 if (!connector->encoder || connector->encoder->crtc != crtc)
1073                         continue;
1074
1075                 switch (intel_output->type) {
1076                 case INTEL_OUTPUT_LVDS:
1077                         is_lvds = true;
1078                         break;
1079                 case INTEL_OUTPUT_SDVO:
1080                 case INTEL_OUTPUT_HDMI:
1081                         is_sdvo = true;
1082                         if (intel_output->needs_tv_clock)
1083                                 is_tv = true;
1084                         break;
1085                 case INTEL_OUTPUT_DVO:
1086                         is_dvo = true;
1087                         break;
1088                 case INTEL_OUTPUT_TVOUT:
1089                         is_tv = true;
1090                         break;
1091                 case INTEL_OUTPUT_ANALOG:
1092                         is_crt = true;
1093                         break;
1094                 }
1095
1096                 num_outputs++;
1097         }
1098
1099         if (is_lvds && dev_priv->lvds_use_ssc && num_outputs < 2) {
1100                 refclk = dev_priv->lvds_ssc_freq * 1000;
1101                 DRM_DEBUG("using SSC reference clock of %d MHz\n", refclk / 1000);
1102         } else if (IS_I9XX(dev)) {
1103                 refclk = 96000;
1104         } else {
1105                 refclk = 48000;
1106         }
1107
1108         /*
1109          * Returns a set of divisors for the desired target clock with the given
1110          * refclk, or FALSE.  The returned values represent the clock equation:
1111          * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
1112          */
1113         limit = intel_limit(crtc);
1114         ok = limit->find_pll(limit, crtc, adjusted_mode->clock, refclk, &clock);
1115         if (!ok) {
1116                 DRM_ERROR("Couldn't find PLL settings for mode!\n");
1117                 return -EINVAL;
1118         }
1119
1120         /* SDVO TV has fixed PLL values depend on its clock range,
1121            this mirrors vbios setting. */
1122         if (is_sdvo && is_tv) {
1123                 if (adjusted_mode->clock >= 100000
1124                                 && adjusted_mode->clock < 140500) {
1125                         clock.p1 = 2;
1126                         clock.p2 = 10;
1127                         clock.n = 3;
1128                         clock.m1 = 16;
1129                         clock.m2 = 8;
1130                 } else if (adjusted_mode->clock >= 140500
1131                                 && adjusted_mode->clock <= 200000) {
1132                         clock.p1 = 1;
1133                         clock.p2 = 10;
1134                         clock.n = 6;
1135                         clock.m1 = 12;
1136                         clock.m2 = 8;
1137                 }
1138         }
1139
1140         if (IS_IGD(dev))
1141                 fp = (1 << clock.n) << 16 | clock.m1 << 8 | clock.m2;
1142         else
1143                 fp = clock.n << 16 | clock.m1 << 8 | clock.m2;
1144
1145         dpll = DPLL_VGA_MODE_DIS;
1146         if (IS_I9XX(dev)) {
1147                 if (is_lvds)
1148                         dpll |= DPLLB_MODE_LVDS;
1149                 else
1150                         dpll |= DPLLB_MODE_DAC_SERIAL;
1151                 if (is_sdvo) {
1152                         dpll |= DPLL_DVO_HIGH_SPEED;
1153                         if (IS_I945G(dev) || IS_I945GM(dev)) {
1154                                 int sdvo_pixel_multiply = adjusted_mode->clock / mode->clock;
1155                                 dpll |= (sdvo_pixel_multiply - 1) << SDVO_MULTIPLIER_SHIFT_HIRES;
1156                         }
1157                 }
1158
1159                 /* compute bitmask from p1 value */
1160                 if (IS_IGD(dev))
1161                         dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT_IGD;
1162                 else
1163                         dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
1164                 switch (clock.p2) {
1165                 case 5:
1166                         dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
1167                         break;
1168                 case 7:
1169                         dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
1170                         break;
1171                 case 10:
1172                         dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
1173                         break;
1174                 case 14:
1175                         dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
1176                         break;
1177                 }
1178                 if (IS_I965G(dev))
1179                         dpll |= (6 << PLL_LOAD_PULSE_PHASE_SHIFT);
1180         } else {
1181                 if (is_lvds) {
1182                         dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
1183                 } else {
1184                         if (clock.p1 == 2)
1185                                 dpll |= PLL_P1_DIVIDE_BY_TWO;
1186                         else
1187                                 dpll |= (clock.p1 - 2) << DPLL_FPA01_P1_POST_DIV_SHIFT;
1188                         if (clock.p2 == 4)
1189                                 dpll |= PLL_P2_DIVIDE_BY_4;
1190                 }
1191         }
1192
1193         if (is_sdvo && is_tv)
1194                 dpll |= PLL_REF_INPUT_TVCLKINBC;
1195         else if (is_tv)
1196                 /* XXX: just matching BIOS for now */
1197                 /*      dpll |= PLL_REF_INPUT_TVCLKINBC; */
1198                 dpll |= 3;
1199         else if (is_lvds && dev_priv->lvds_use_ssc && num_outputs < 2)
1200                 dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
1201         else
1202                 dpll |= PLL_REF_INPUT_DREFCLK;
1203
1204         /* setup pipeconf */
1205         pipeconf = I915_READ(pipeconf_reg);
1206
1207         /* Set up the display plane register */
1208         dspcntr = DISPPLANE_GAMMA_ENABLE;
1209
1210         if (pipe == 0)
1211                 dspcntr |= DISPPLANE_SEL_PIPE_A;
1212         else
1213                 dspcntr |= DISPPLANE_SEL_PIPE_B;
1214
1215         if (pipe == 0 && !IS_I965G(dev)) {
1216                 /* Enable pixel doubling when the dot clock is > 90% of the (display)
1217                  * core speed.
1218                  *
1219                  * XXX: No double-wide on 915GM pipe B. Is that the only reason for the
1220                  * pipe == 0 check?
1221                  */
1222                 if (mode->clock > intel_get_core_clock_speed(dev) * 9 / 10)
1223                         pipeconf |= PIPEACONF_DOUBLE_WIDE;
1224                 else
1225                         pipeconf &= ~PIPEACONF_DOUBLE_WIDE;
1226         }
1227
1228         dspcntr |= DISPLAY_PLANE_ENABLE;
1229         pipeconf |= PIPEACONF_ENABLE;
1230         dpll |= DPLL_VCO_ENABLE;
1231
1232
1233         /* Disable the panel fitter if it was on our pipe */
1234         if (intel_panel_fitter_pipe(dev) == pipe)
1235                 I915_WRITE(PFIT_CONTROL, 0);
1236
1237         DRM_DEBUG("Mode for pipe %c:\n", pipe == 0 ? 'A' : 'B');
1238         drm_mode_debug_printmodeline(mode);
1239
1240
1241         if (dpll & DPLL_VCO_ENABLE) {
1242                 I915_WRITE(fp_reg, fp);
1243                 I915_WRITE(dpll_reg, dpll & ~DPLL_VCO_ENABLE);
1244                 I915_READ(dpll_reg);
1245                 udelay(150);
1246         }
1247
1248         /* The LVDS pin pair needs to be on before the DPLLs are enabled.
1249          * This is an exception to the general rule that mode_set doesn't turn
1250          * things on.
1251          */
1252         if (is_lvds) {
1253                 u32 lvds = I915_READ(LVDS);
1254
1255                 lvds |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP | LVDS_PIPEB_SELECT;
1256                 /* Set the B0-B3 data pairs corresponding to whether we're going to
1257                  * set the DPLLs for dual-channel mode or not.
1258                  */
1259                 if (clock.p2 == 7)
1260                         lvds |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
1261                 else
1262                         lvds &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
1263
1264                 /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
1265                  * appropriately here, but we need to look more thoroughly into how
1266                  * panels behave in the two modes.
1267                  */
1268
1269                 I915_WRITE(LVDS, lvds);
1270                 I915_READ(LVDS);
1271         }
1272
1273         I915_WRITE(fp_reg, fp);
1274         I915_WRITE(dpll_reg, dpll);
1275         I915_READ(dpll_reg);
1276         /* Wait for the clocks to stabilize. */
1277         udelay(150);
1278
1279         if (IS_I965G(dev)) {
1280                 int sdvo_pixel_multiply = adjusted_mode->clock / mode->clock;
1281                 I915_WRITE(dpll_md_reg, (0 << DPLL_MD_UDI_DIVIDER_SHIFT) |
1282                            ((sdvo_pixel_multiply - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT));
1283         } else {
1284                 /* write it again -- the BIOS does, after all */
1285                 I915_WRITE(dpll_reg, dpll);
1286         }
1287         I915_READ(dpll_reg);
1288         /* Wait for the clocks to stabilize. */
1289         udelay(150);
1290
1291         I915_WRITE(htot_reg, (adjusted_mode->crtc_hdisplay - 1) |
1292                    ((adjusted_mode->crtc_htotal - 1) << 16));
1293         I915_WRITE(hblank_reg, (adjusted_mode->crtc_hblank_start - 1) |
1294                    ((adjusted_mode->crtc_hblank_end - 1) << 16));
1295         I915_WRITE(hsync_reg, (adjusted_mode->crtc_hsync_start - 1) |
1296                    ((adjusted_mode->crtc_hsync_end - 1) << 16));
1297         I915_WRITE(vtot_reg, (adjusted_mode->crtc_vdisplay - 1) |
1298                    ((adjusted_mode->crtc_vtotal - 1) << 16));
1299         I915_WRITE(vblank_reg, (adjusted_mode->crtc_vblank_start - 1) |
1300                    ((adjusted_mode->crtc_vblank_end - 1) << 16));
1301         I915_WRITE(vsync_reg, (adjusted_mode->crtc_vsync_start - 1) |
1302                    ((adjusted_mode->crtc_vsync_end - 1) << 16));
1303         /* pipesrc and dspsize control the size that is scaled from, which should
1304          * always be the user's requested size.
1305          */
1306         I915_WRITE(dspsize_reg, ((mode->vdisplay - 1) << 16) | (mode->hdisplay - 1));
1307         I915_WRITE(dsppos_reg, 0);
1308         I915_WRITE(pipesrc_reg, ((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
1309         I915_WRITE(pipeconf_reg, pipeconf);
1310         I915_READ(pipeconf_reg);
1311
1312         intel_wait_for_vblank(dev);
1313
1314         I915_WRITE(dspcntr_reg, dspcntr);
1315
1316         /* Flush the plane changes */
1317         ret = intel_pipe_set_base(crtc, x, y, old_fb);
1318         if (ret != 0)
1319             return ret;
1320
1321         drm_vblank_post_modeset(dev, pipe);
1322
1323         return 0;
1324 }
1325
1326 /** Loads the palette/gamma unit for the CRTC with the prepared values */
1327 void intel_crtc_load_lut(struct drm_crtc *crtc)
1328 {
1329         struct drm_device *dev = crtc->dev;
1330         struct drm_i915_private *dev_priv = dev->dev_private;
1331         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1332         int palreg = (intel_crtc->pipe == 0) ? PALETTE_A : PALETTE_B;
1333         int i;
1334
1335         /* The clocks have to be on to load the palette. */
1336         if (!crtc->enabled)
1337                 return;
1338
1339         for (i = 0; i < 256; i++) {
1340                 I915_WRITE(palreg + 4 * i,
1341                            (intel_crtc->lut_r[i] << 16) |
1342                            (intel_crtc->lut_g[i] << 8) |
1343                            intel_crtc->lut_b[i]);
1344         }
1345 }
1346
1347 static int intel_crtc_cursor_set(struct drm_crtc *crtc,
1348                                  struct drm_file *file_priv,
1349                                  uint32_t handle,
1350                                  uint32_t width, uint32_t height)
1351 {
1352         struct drm_device *dev = crtc->dev;
1353         struct drm_i915_private *dev_priv = dev->dev_private;
1354         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1355         struct drm_gem_object *bo;
1356         struct drm_i915_gem_object *obj_priv;
1357         int pipe = intel_crtc->pipe;
1358         uint32_t control = (pipe == 0) ? CURACNTR : CURBCNTR;
1359         uint32_t base = (pipe == 0) ? CURABASE : CURBBASE;
1360         uint32_t temp = I915_READ(control);
1361         size_t addr;
1362         int ret;
1363
1364         DRM_DEBUG("\n");
1365
1366         /* if we want to turn off the cursor ignore width and height */
1367         if (!handle) {
1368                 DRM_DEBUG("cursor off\n");
1369                 if (IS_MOBILE(dev) || IS_I9XX(dev)) {
1370                         temp &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
1371                         temp |= CURSOR_MODE_DISABLE;
1372                 } else {
1373                         temp &= ~(CURSOR_ENABLE | CURSOR_GAMMA_ENABLE);
1374                 }
1375                 addr = 0;
1376                 bo = NULL;
1377                 mutex_lock(&dev->struct_mutex);
1378                 goto finish;
1379         }
1380
1381         /* Currently we only support 64x64 cursors */
1382         if (width != 64 || height != 64) {
1383                 DRM_ERROR("we currently only support 64x64 cursors\n");
1384                 return -EINVAL;
1385         }
1386
1387         bo = drm_gem_object_lookup(dev, file_priv, handle);
1388         if (!bo)
1389                 return -ENOENT;
1390
1391         obj_priv = bo->driver_private;
1392
1393         if (bo->size < width * height * 4) {
1394                 DRM_ERROR("buffer is to small\n");
1395                 ret = -ENOMEM;
1396                 goto fail;
1397         }
1398
1399         /* we only need to pin inside GTT if cursor is non-phy */
1400         mutex_lock(&dev->struct_mutex);
1401         if (!dev_priv->cursor_needs_physical) {
1402                 ret = i915_gem_object_pin(bo, PAGE_SIZE);
1403                 if (ret) {
1404                         DRM_ERROR("failed to pin cursor bo\n");
1405                         goto fail_locked;
1406                 }
1407                 addr = obj_priv->gtt_offset;
1408         } else {
1409                 ret = i915_gem_attach_phys_object(dev, bo, (pipe == 0) ? I915_GEM_PHYS_CURSOR_0 : I915_GEM_PHYS_CURSOR_1);
1410                 if (ret) {
1411                         DRM_ERROR("failed to attach phys object\n");
1412                         goto fail_locked;
1413                 }
1414                 addr = obj_priv->phys_obj->handle->busaddr;
1415         }
1416
1417         if (!IS_I9XX(dev))
1418                 I915_WRITE(CURSIZE, (height << 12) | width);
1419
1420         /* Hooray for CUR*CNTR differences */
1421         if (IS_MOBILE(dev) || IS_I9XX(dev)) {
1422                 temp &= ~(CURSOR_MODE | MCURSOR_PIPE_SELECT);
1423                 temp |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
1424                 temp |= (pipe << 28); /* Connect to correct pipe */
1425         } else {
1426                 temp &= ~(CURSOR_FORMAT_MASK);
1427                 temp |= CURSOR_ENABLE;
1428                 temp |= CURSOR_FORMAT_ARGB | CURSOR_GAMMA_ENABLE;
1429         }
1430
1431  finish:
1432         I915_WRITE(control, temp);
1433         I915_WRITE(base, addr);
1434
1435         if (intel_crtc->cursor_bo) {
1436                 if (dev_priv->cursor_needs_physical) {
1437                         if (intel_crtc->cursor_bo != bo)
1438                                 i915_gem_detach_phys_object(dev, intel_crtc->cursor_bo);
1439                 } else
1440                         i915_gem_object_unpin(intel_crtc->cursor_bo);
1441                 drm_gem_object_unreference(intel_crtc->cursor_bo);
1442         }
1443         mutex_unlock(&dev->struct_mutex);
1444
1445         intel_crtc->cursor_addr = addr;
1446         intel_crtc->cursor_bo = bo;
1447
1448         return 0;
1449 fail:
1450         mutex_lock(&dev->struct_mutex);
1451 fail_locked:
1452         drm_gem_object_unreference(bo);
1453         mutex_unlock(&dev->struct_mutex);
1454         return ret;
1455 }
1456
1457 static int intel_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
1458 {
1459         struct drm_device *dev = crtc->dev;
1460         struct drm_i915_private *dev_priv = dev->dev_private;
1461         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1462         int pipe = intel_crtc->pipe;
1463         uint32_t temp = 0;
1464         uint32_t adder;
1465
1466         if (x < 0) {
1467                 temp |= (CURSOR_POS_SIGN << CURSOR_X_SHIFT);
1468                 x = -x;
1469         }
1470         if (y < 0) {
1471                 temp |= (CURSOR_POS_SIGN << CURSOR_Y_SHIFT);
1472                 y = -y;
1473         }
1474
1475         temp |= ((x & CURSOR_POS_MASK) << CURSOR_X_SHIFT);
1476         temp |= ((y & CURSOR_POS_MASK) << CURSOR_Y_SHIFT);
1477
1478         adder = intel_crtc->cursor_addr;
1479         I915_WRITE((pipe == 0) ? CURAPOS : CURBPOS, temp);
1480         I915_WRITE((pipe == 0) ? CURABASE : CURBBASE, adder);
1481
1482         return 0;
1483 }
1484
1485 /** Sets the color ramps on behalf of RandR */
1486 void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
1487                                  u16 blue, int regno)
1488 {
1489         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1490
1491         intel_crtc->lut_r[regno] = red >> 8;
1492         intel_crtc->lut_g[regno] = green >> 8;
1493         intel_crtc->lut_b[regno] = blue >> 8;
1494 }
1495
1496 static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
1497                                  u16 *blue, uint32_t size)
1498 {
1499         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1500         int i;
1501
1502         if (size != 256)
1503                 return;
1504
1505         for (i = 0; i < 256; i++) {
1506                 intel_crtc->lut_r[i] = red[i] >> 8;
1507                 intel_crtc->lut_g[i] = green[i] >> 8;
1508                 intel_crtc->lut_b[i] = blue[i] >> 8;
1509         }
1510
1511         intel_crtc_load_lut(crtc);
1512 }
1513
1514 /**
1515  * Get a pipe with a simple mode set on it for doing load-based monitor
1516  * detection.
1517  *
1518  * It will be up to the load-detect code to adjust the pipe as appropriate for
1519  * its requirements.  The pipe will be connected to no other outputs.
1520  *
1521  * Currently this code will only succeed if there is a pipe with no outputs
1522  * configured for it.  In the future, it could choose to temporarily disable
1523  * some outputs to free up a pipe for its use.
1524  *
1525  * \return crtc, or NULL if no pipes are available.
1526  */
1527
1528 /* VESA 640x480x72Hz mode to set on the pipe */
1529 static struct drm_display_mode load_detect_mode = {
1530         DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 31500, 640, 664,
1531                  704, 832, 0, 480, 489, 491, 520, 0, DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC),
1532 };
1533
1534 struct drm_crtc *intel_get_load_detect_pipe(struct intel_output *intel_output,
1535                                             struct drm_display_mode *mode,
1536                                             int *dpms_mode)
1537 {
1538         struct intel_crtc *intel_crtc;
1539         struct drm_crtc *possible_crtc;
1540         struct drm_crtc *supported_crtc =NULL;
1541         struct drm_encoder *encoder = &intel_output->enc;
1542         struct drm_crtc *crtc = NULL;
1543         struct drm_device *dev = encoder->dev;
1544         struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
1545         struct drm_crtc_helper_funcs *crtc_funcs;
1546         int i = -1;
1547
1548         /*
1549          * Algorithm gets a little messy:
1550          *   - if the connector already has an assigned crtc, use it (but make
1551          *     sure it's on first)
1552          *   - try to find the first unused crtc that can drive this connector,
1553          *     and use that if we find one
1554          *   - if there are no unused crtcs available, try to use the first
1555          *     one we found that supports the connector
1556          */
1557
1558         /* See if we already have a CRTC for this connector */
1559         if (encoder->crtc) {
1560                 crtc = encoder->crtc;
1561                 /* Make sure the crtc and connector are running */
1562                 intel_crtc = to_intel_crtc(crtc);
1563                 *dpms_mode = intel_crtc->dpms_mode;
1564                 if (intel_crtc->dpms_mode != DRM_MODE_DPMS_ON) {
1565                         crtc_funcs = crtc->helper_private;
1566                         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
1567                         encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
1568                 }
1569                 return crtc;
1570         }
1571
1572         /* Find an unused one (if possible) */
1573         list_for_each_entry(possible_crtc, &dev->mode_config.crtc_list, head) {
1574                 i++;
1575                 if (!(encoder->possible_crtcs & (1 << i)))
1576                         continue;
1577                 if (!possible_crtc->enabled) {
1578                         crtc = possible_crtc;
1579                         break;
1580                 }
1581                 if (!supported_crtc)
1582                         supported_crtc = possible_crtc;
1583         }
1584
1585         /*
1586          * If we didn't find an unused CRTC, don't use any.
1587          */
1588         if (!crtc) {
1589                 return NULL;
1590         }
1591
1592         encoder->crtc = crtc;
1593         intel_output->load_detect_temp = true;
1594
1595         intel_crtc = to_intel_crtc(crtc);
1596         *dpms_mode = intel_crtc->dpms_mode;
1597
1598         if (!crtc->enabled) {
1599                 if (!mode)
1600                         mode = &load_detect_mode;
1601                 drm_crtc_helper_set_mode(crtc, mode, 0, 0, crtc->fb);
1602         } else {
1603                 if (intel_crtc->dpms_mode != DRM_MODE_DPMS_ON) {
1604                         crtc_funcs = crtc->helper_private;
1605                         crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
1606                 }
1607
1608                 /* Add this connector to the crtc */
1609                 encoder_funcs->mode_set(encoder, &crtc->mode, &crtc->mode);
1610                 encoder_funcs->commit(encoder);
1611         }
1612         /* let the connector get through one full cycle before testing */
1613         intel_wait_for_vblank(dev);
1614
1615         return crtc;
1616 }
1617
1618 void intel_release_load_detect_pipe(struct intel_output *intel_output, int dpms_mode)
1619 {
1620         struct drm_encoder *encoder = &intel_output->enc;
1621         struct drm_device *dev = encoder->dev;
1622         struct drm_crtc *crtc = encoder->crtc;
1623         struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
1624         struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
1625
1626         if (intel_output->load_detect_temp) {
1627                 encoder->crtc = NULL;
1628                 intel_output->load_detect_temp = false;
1629                 crtc->enabled = drm_helper_crtc_in_use(crtc);
1630                 drm_helper_disable_unused_functions(dev);
1631         }
1632
1633         /* Switch crtc and output back off if necessary */
1634         if (crtc->enabled && dpms_mode != DRM_MODE_DPMS_ON) {
1635                 if (encoder->crtc == crtc)
1636                         encoder_funcs->dpms(encoder, dpms_mode);
1637                 crtc_funcs->dpms(crtc, dpms_mode);
1638         }
1639 }
1640
1641 /* Returns the clock of the currently programmed mode of the given pipe. */
1642 static int intel_crtc_clock_get(struct drm_device *dev, struct drm_crtc *crtc)
1643 {
1644         struct drm_i915_private *dev_priv = dev->dev_private;
1645         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1646         int pipe = intel_crtc->pipe;
1647         u32 dpll = I915_READ((pipe == 0) ? DPLL_A : DPLL_B);
1648         u32 fp;
1649         intel_clock_t clock;
1650
1651         if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
1652                 fp = I915_READ((pipe == 0) ? FPA0 : FPB0);
1653         else
1654                 fp = I915_READ((pipe == 0) ? FPA1 : FPB1);
1655
1656         clock.m1 = (fp & FP_M1_DIV_MASK) >> FP_M1_DIV_SHIFT;
1657         if (IS_IGD(dev)) {
1658                 clock.n = ffs((fp & FP_N_IGD_DIV_MASK) >> FP_N_DIV_SHIFT) - 1;
1659                 clock.m2 = (fp & FP_M2_IGD_DIV_MASK) >> FP_M2_DIV_SHIFT;
1660         } else {
1661                 clock.n = (fp & FP_N_DIV_MASK) >> FP_N_DIV_SHIFT;
1662                 clock.m2 = (fp & FP_M2_DIV_MASK) >> FP_M2_DIV_SHIFT;
1663         }
1664
1665         if (IS_I9XX(dev)) {
1666                 if (IS_IGD(dev))
1667                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_IGD) >>
1668                                 DPLL_FPA01_P1_POST_DIV_SHIFT_IGD);
1669                 else
1670                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK) >>
1671                                DPLL_FPA01_P1_POST_DIV_SHIFT);
1672
1673                 switch (dpll & DPLL_MODE_MASK) {
1674                 case DPLLB_MODE_DAC_SERIAL:
1675                         clock.p2 = dpll & DPLL_DAC_SERIAL_P2_CLOCK_DIV_5 ?
1676                                 5 : 10;
1677                         break;
1678                 case DPLLB_MODE_LVDS:
1679                         clock.p2 = dpll & DPLLB_LVDS_P2_CLOCK_DIV_7 ?
1680                                 7 : 14;
1681                         break;
1682                 default:
1683                         DRM_DEBUG("Unknown DPLL mode %08x in programmed "
1684                                   "mode\n", (int)(dpll & DPLL_MODE_MASK));
1685                         return 0;
1686                 }
1687
1688                 /* XXX: Handle the 100Mhz refclk */
1689                 intel_clock(dev, 96000, &clock);
1690         } else {
1691                 bool is_lvds = (pipe == 1) && (I915_READ(LVDS) & LVDS_PORT_EN);
1692
1693                 if (is_lvds) {
1694                         clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
1695                                        DPLL_FPA01_P1_POST_DIV_SHIFT);
1696                         clock.p2 = 14;
1697
1698                         if ((dpll & PLL_REF_INPUT_MASK) ==
1699                             PLLB_REF_INPUT_SPREADSPECTRUMIN) {
1700                                 /* XXX: might not be 66MHz */
1701                                 intel_clock(dev, 66000, &clock);
1702                         } else
1703                                 intel_clock(dev, 48000, &clock);
1704                 } else {
1705                         if (dpll & PLL_P1_DIVIDE_BY_TWO)
1706                                 clock.p1 = 2;
1707                         else {
1708                                 clock.p1 = ((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830) >>
1709                                             DPLL_FPA01_P1_POST_DIV_SHIFT) + 2;
1710                         }
1711                         if (dpll & PLL_P2_DIVIDE_BY_4)
1712                                 clock.p2 = 4;
1713                         else
1714                                 clock.p2 = 2;
1715
1716                         intel_clock(dev, 48000, &clock);
1717                 }
1718         }
1719
1720         /* XXX: It would be nice to validate the clocks, but we can't reuse
1721          * i830PllIsValid() because it relies on the xf86_config connector
1722          * configuration being accurate, which it isn't necessarily.
1723          */
1724
1725         return clock.dot;
1726 }
1727
1728 /** Returns the currently programmed mode of the given pipe. */
1729 struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
1730                                              struct drm_crtc *crtc)
1731 {
1732         struct drm_i915_private *dev_priv = dev->dev_private;
1733         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1734         int pipe = intel_crtc->pipe;
1735         struct drm_display_mode *mode;
1736         int htot = I915_READ((pipe == 0) ? HTOTAL_A : HTOTAL_B);
1737         int hsync = I915_READ((pipe == 0) ? HSYNC_A : HSYNC_B);
1738         int vtot = I915_READ((pipe == 0) ? VTOTAL_A : VTOTAL_B);
1739         int vsync = I915_READ((pipe == 0) ? VSYNC_A : VSYNC_B);
1740
1741         mode = kzalloc(sizeof(*mode), GFP_KERNEL);
1742         if (!mode)
1743                 return NULL;
1744
1745         mode->clock = intel_crtc_clock_get(dev, crtc);
1746         mode->hdisplay = (htot & 0xffff) + 1;
1747         mode->htotal = ((htot & 0xffff0000) >> 16) + 1;
1748         mode->hsync_start = (hsync & 0xffff) + 1;
1749         mode->hsync_end = ((hsync & 0xffff0000) >> 16) + 1;
1750         mode->vdisplay = (vtot & 0xffff) + 1;
1751         mode->vtotal = ((vtot & 0xffff0000) >> 16) + 1;
1752         mode->vsync_start = (vsync & 0xffff) + 1;
1753         mode->vsync_end = ((vsync & 0xffff0000) >> 16) + 1;
1754
1755         drm_mode_set_name(mode);
1756         drm_mode_set_crtcinfo(mode, 0);
1757
1758         return mode;
1759 }
1760
1761 static void intel_crtc_destroy(struct drm_crtc *crtc)
1762 {
1763         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1764
1765         drm_crtc_cleanup(crtc);
1766         kfree(intel_crtc);
1767 }
1768
1769 static const struct drm_crtc_helper_funcs intel_helper_funcs = {
1770         .dpms = intel_crtc_dpms,
1771         .mode_fixup = intel_crtc_mode_fixup,
1772         .mode_set = intel_crtc_mode_set,
1773         .mode_set_base = intel_pipe_set_base,
1774         .prepare = intel_crtc_prepare,
1775         .commit = intel_crtc_commit,
1776 };
1777
1778 static const struct drm_crtc_funcs intel_crtc_funcs = {
1779         .cursor_set = intel_crtc_cursor_set,
1780         .cursor_move = intel_crtc_cursor_move,
1781         .gamma_set = intel_crtc_gamma_set,
1782         .set_config = drm_crtc_helper_set_config,
1783         .destroy = intel_crtc_destroy,
1784 };
1785
1786
1787 static void intel_crtc_init(struct drm_device *dev, int pipe)
1788 {
1789         struct intel_crtc *intel_crtc;
1790         int i;
1791
1792         intel_crtc = kzalloc(sizeof(struct intel_crtc) + (INTELFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
1793         if (intel_crtc == NULL)
1794                 return;
1795
1796         drm_crtc_init(dev, &intel_crtc->base, &intel_crtc_funcs);
1797
1798         drm_mode_crtc_set_gamma_size(&intel_crtc->base, 256);
1799         intel_crtc->pipe = pipe;
1800         for (i = 0; i < 256; i++) {
1801                 intel_crtc->lut_r[i] = i;
1802                 intel_crtc->lut_g[i] = i;
1803                 intel_crtc->lut_b[i] = i;
1804         }
1805
1806         intel_crtc->cursor_addr = 0;
1807         intel_crtc->dpms_mode = DRM_MODE_DPMS_OFF;
1808         drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
1809
1810         intel_crtc->mode_set.crtc = &intel_crtc->base;
1811         intel_crtc->mode_set.connectors = (struct drm_connector **)(intel_crtc + 1);
1812         intel_crtc->mode_set.num_connectors = 0;
1813
1814         if (i915_fbpercrtc) {
1815
1816
1817
1818         }
1819 }
1820
1821 int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
1822                                 struct drm_file *file_priv)
1823 {
1824         drm_i915_private_t *dev_priv = dev->dev_private;
1825         struct drm_i915_get_pipe_from_crtc_id *pipe_from_crtc_id = data;
1826         struct drm_crtc *crtc = NULL;
1827         int pipe = -1;
1828
1829         if (!dev_priv) {
1830                 DRM_ERROR("called with no initialization\n");
1831                 return -EINVAL;
1832         }
1833
1834         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1835                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1836                 if (crtc->base.id == pipe_from_crtc_id->crtc_id) {
1837                         pipe = intel_crtc->pipe;
1838                         break;
1839                 }
1840         }
1841
1842         if (pipe == -1) {
1843                 DRM_ERROR("no such CRTC id\n");
1844                 return -EINVAL;
1845         }
1846
1847         pipe_from_crtc_id->pipe = pipe;
1848
1849        return 0;
1850 }
1851
1852 struct drm_crtc *intel_get_crtc_from_pipe(struct drm_device *dev, int pipe)
1853 {
1854         struct drm_crtc *crtc = NULL;
1855
1856         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1857                 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1858                 if (intel_crtc->pipe == pipe)
1859                         break;
1860         }
1861         return crtc;
1862 }
1863
1864 static int intel_connector_clones(struct drm_device *dev, int type_mask)
1865 {
1866         int index_mask = 0;
1867         struct drm_connector *connector;
1868         int entry = 0;
1869
1870         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
1871                 struct intel_output *intel_output = to_intel_output(connector);
1872                 if (type_mask & (1 << intel_output->type))
1873                         index_mask |= (1 << entry);
1874                 entry++;
1875         }
1876         return index_mask;
1877 }
1878
1879
1880 static void intel_setup_outputs(struct drm_device *dev)
1881 {
1882         struct drm_i915_private *dev_priv = dev->dev_private;
1883         struct drm_connector *connector;
1884
1885         intel_crt_init(dev);
1886
1887         /* Set up integrated LVDS */
1888         if (IS_MOBILE(dev) && !IS_I830(dev))
1889                 intel_lvds_init(dev);
1890
1891         if (IS_I9XX(dev)) {
1892                 int found;
1893                 u32 reg;
1894
1895                 if (I915_READ(SDVOB) & SDVO_DETECTED) {
1896                         found = intel_sdvo_init(dev, SDVOB);
1897                         if (!found && SUPPORTS_INTEGRATED_HDMI(dev))
1898                                 intel_hdmi_init(dev, SDVOB);
1899                 }
1900
1901                 /* Before G4X SDVOC doesn't have its own detect register */
1902                 if (IS_G4X(dev))
1903                         reg = SDVOC;
1904                 else
1905                         reg = SDVOB;
1906
1907                 if (I915_READ(reg) & SDVO_DETECTED) {
1908                         found = intel_sdvo_init(dev, SDVOC);
1909                         if (!found && SUPPORTS_INTEGRATED_HDMI(dev))
1910                                 intel_hdmi_init(dev, SDVOC);
1911                 }
1912         } else
1913                 intel_dvo_init(dev);
1914
1915         if (IS_I9XX(dev) && IS_MOBILE(dev))
1916                 intel_tv_init(dev);
1917
1918         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
1919                 struct intel_output *intel_output = to_intel_output(connector);
1920                 struct drm_encoder *encoder = &intel_output->enc;
1921                 int crtc_mask = 0, clone_mask = 0;
1922
1923                 /* valid crtcs */
1924                 switch(intel_output->type) {
1925                 case INTEL_OUTPUT_HDMI:
1926                         crtc_mask = ((1 << 0)|
1927                                      (1 << 1));
1928                         clone_mask = ((1 << INTEL_OUTPUT_HDMI));
1929                         break;
1930                 case INTEL_OUTPUT_DVO:
1931                 case INTEL_OUTPUT_SDVO:
1932                         crtc_mask = ((1 << 0)|
1933                                      (1 << 1));
1934                         clone_mask = ((1 << INTEL_OUTPUT_ANALOG) |
1935                                       (1 << INTEL_OUTPUT_DVO) |
1936                                       (1 << INTEL_OUTPUT_SDVO));
1937                         break;
1938                 case INTEL_OUTPUT_ANALOG:
1939                         crtc_mask = ((1 << 0)|
1940                                      (1 << 1));
1941                         clone_mask = ((1 << INTEL_OUTPUT_ANALOG) |
1942                                       (1 << INTEL_OUTPUT_DVO) |
1943                                       (1 << INTEL_OUTPUT_SDVO));
1944                         break;
1945                 case INTEL_OUTPUT_LVDS:
1946                         crtc_mask = (1 << 1);
1947                         clone_mask = (1 << INTEL_OUTPUT_LVDS);
1948                         break;
1949                 case INTEL_OUTPUT_TVOUT:
1950                         crtc_mask = ((1 << 0) |
1951                                      (1 << 1));
1952                         clone_mask = (1 << INTEL_OUTPUT_TVOUT);
1953                         break;
1954                 }
1955                 encoder->possible_crtcs = crtc_mask;
1956                 encoder->possible_clones = intel_connector_clones(dev, clone_mask);
1957         }
1958 }
1959
1960 static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
1961 {
1962         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
1963         struct drm_device *dev = fb->dev;
1964
1965         if (fb->fbdev)
1966                 intelfb_remove(dev, fb);
1967
1968         drm_framebuffer_cleanup(fb);
1969         mutex_lock(&dev->struct_mutex);
1970         drm_gem_object_unreference(intel_fb->obj);
1971         mutex_unlock(&dev->struct_mutex);
1972
1973         kfree(intel_fb);
1974 }
1975
1976 static int intel_user_framebuffer_create_handle(struct drm_framebuffer *fb,
1977                                                 struct drm_file *file_priv,
1978                                                 unsigned int *handle)
1979 {
1980         struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
1981         struct drm_gem_object *object = intel_fb->obj;
1982
1983         return drm_gem_handle_create(file_priv, object, handle);
1984 }
1985
1986 static const struct drm_framebuffer_funcs intel_fb_funcs = {
1987         .destroy = intel_user_framebuffer_destroy,
1988         .create_handle = intel_user_framebuffer_create_handle,
1989 };
1990
1991 int intel_framebuffer_create(struct drm_device *dev,
1992                              struct drm_mode_fb_cmd *mode_cmd,
1993                              struct drm_framebuffer **fb,
1994                              struct drm_gem_object *obj)
1995 {
1996         struct intel_framebuffer *intel_fb;
1997         int ret;
1998
1999         intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
2000         if (!intel_fb)
2001                 return -ENOMEM;
2002
2003         ret = drm_framebuffer_init(dev, &intel_fb->base, &intel_fb_funcs);
2004         if (ret) {
2005                 DRM_ERROR("framebuffer init failed %d\n", ret);
2006                 return ret;
2007         }
2008
2009         drm_helper_mode_fill_fb_struct(&intel_fb->base, mode_cmd);
2010
2011         intel_fb->obj = obj;
2012
2013         *fb = &intel_fb->base;
2014
2015         return 0;
2016 }
2017
2018
2019 static struct drm_framebuffer *
2020 intel_user_framebuffer_create(struct drm_device *dev,
2021                               struct drm_file *filp,
2022                               struct drm_mode_fb_cmd *mode_cmd)
2023 {
2024         struct drm_gem_object *obj;
2025         struct drm_framebuffer *fb;
2026         int ret;
2027
2028         obj = drm_gem_object_lookup(dev, filp, mode_cmd->handle);
2029         if (!obj)
2030                 return NULL;
2031
2032         ret = intel_framebuffer_create(dev, mode_cmd, &fb, obj);
2033         if (ret) {
2034                 mutex_lock(&dev->struct_mutex);
2035                 drm_gem_object_unreference(obj);
2036                 mutex_unlock(&dev->struct_mutex);
2037                 return NULL;
2038         }
2039
2040         return fb;
2041 }
2042
2043 static const struct drm_mode_config_funcs intel_mode_funcs = {
2044         .fb_create = intel_user_framebuffer_create,
2045         .fb_changed = intelfb_probe,
2046 };
2047
2048 void intel_modeset_init(struct drm_device *dev)
2049 {
2050         int num_pipe;
2051         int i;
2052
2053         drm_mode_config_init(dev);
2054
2055         dev->mode_config.min_width = 0;
2056         dev->mode_config.min_height = 0;
2057
2058         dev->mode_config.funcs = (void *)&intel_mode_funcs;
2059
2060         if (IS_I965G(dev)) {
2061                 dev->mode_config.max_width = 8192;
2062                 dev->mode_config.max_height = 8192;
2063         } else {
2064                 dev->mode_config.max_width = 2048;
2065                 dev->mode_config.max_height = 2048;
2066         }
2067
2068         /* set memory base */
2069         if (IS_I9XX(dev))
2070                 dev->mode_config.fb_base = pci_resource_start(dev->pdev, 2);
2071         else
2072                 dev->mode_config.fb_base = pci_resource_start(dev->pdev, 0);
2073
2074         if (IS_MOBILE(dev) || IS_I9XX(dev))
2075                 num_pipe = 2;
2076         else
2077                 num_pipe = 1;
2078         DRM_DEBUG("%d display pipe%s available.\n",
2079                   num_pipe, num_pipe > 1 ? "s" : "");
2080
2081         for (i = 0; i < num_pipe; i++) {
2082                 intel_crtc_init(dev, i);
2083         }
2084
2085         intel_setup_outputs(dev);
2086 }
2087
2088 void intel_modeset_cleanup(struct drm_device *dev)
2089 {
2090         drm_mode_config_cleanup(dev);
2091 }
2092
2093
2094 /* current intel driver doesn't take advantage of encoders
2095    always give back the encoder for the connector
2096 */
2097 struct drm_encoder *intel_best_encoder(struct drm_connector *connector)
2098 {
2099         struct intel_output *intel_output = to_intel_output(connector);
2100
2101         return &intel_output->enc;
2102 }