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1da177e4 LT |
1 | /* |
2 | * linux/drivers/video/kyro/STG4000OverlayDevice.c | |
3 | * | |
4 | * Copyright (C) 2000 Imagination Technologies Ltd | |
5 | * Copyright (C) 2002 STMicroelectronics | |
6 | * | |
7 | * This file is subject to the terms and conditions of the GNU General Public | |
8 | * License. See the file COPYING in the main directory of this archive | |
9 | * for more details. | |
10 | */ | |
11 | ||
12 | #include <linux/kernel.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/types.h> | |
15 | ||
16 | #include "STG4000Reg.h" | |
a0aa7d06 | 17 | #include "STG4000Interface.h" |
1da177e4 LT |
18 | |
19 | /* HW Defines */ | |
20 | ||
21 | #define STG4000_NO_SCALING 0x800 | |
22 | #define STG4000_NO_DECIMATION 0xFFFFFFFF | |
23 | ||
24 | /* Primary surface */ | |
25 | #define STG4000_PRIM_NUM_PIX 5 | |
26 | #define STG4000_PRIM_ALIGN 4 | |
27 | #define STG4000_PRIM_ADDR_BITS 20 | |
28 | ||
29 | #define STG4000_PRIM_MIN_WIDTH 640 | |
30 | #define STG4000_PRIM_MAX_WIDTH 1600 | |
31 | #define STG4000_PRIM_MIN_HEIGHT 480 | |
32 | #define STG4000_PRIM_MAX_HEIGHT 1200 | |
33 | ||
34 | /* Overlay surface */ | |
35 | #define STG4000_OVRL_NUM_PIX 4 | |
36 | #define STG4000_OVRL_ALIGN 2 | |
37 | #define STG4000_OVRL_ADDR_BITS 20 | |
38 | #define STG4000_OVRL_NUM_MODES 5 | |
39 | ||
40 | #define STG4000_OVRL_MIN_WIDTH 0 | |
41 | #define STG4000_OVRL_MAX_WIDTH 720 | |
42 | #define STG4000_OVRL_MIN_HEIGHT 0 | |
43 | #define STG4000_OVRL_MAX_HEIGHT 576 | |
44 | ||
45 | /* Decimation and Scaling */ | |
46 | static u32 adwDecim8[33] = { | |
47 | 0xffffffff, 0xfffeffff, 0xffdffbff, 0xfefefeff, 0xfdf7efbf, | |
48 | 0xfbdf7bdf, 0xf7bbddef, 0xeeeeeeef, 0xeeddbb77, 0xedb76db7, | |
49 | 0xdb6db6db, 0xdb5b5b5b, 0xdab5ad6b, 0xd5ab55ab, 0xd555aaab, | |
50 | 0xaaaaaaab, 0xaaaa5555, 0xaa952a55, 0xa94a5295, 0xa5252525, | |
51 | 0xa4924925, 0x92491249, 0x91224489, 0x91111111, 0x90884211, | |
52 | 0x88410821, 0x88102041, 0x81010101, 0x80800801, 0x80010001, | |
53 | 0x80000001, 0x00000001, 0x00000000 | |
54 | }; | |
55 | ||
56 | typedef struct _OVRL_SRC_DEST { | |
57 | /*clipped on-screen pixel position of overlay */ | |
58 | u32 ulDstX1; | |
59 | u32 ulDstY1; | |
60 | u32 ulDstX2; | |
61 | u32 ulDstY2; | |
62 | ||
63 | /*clipped pixel pos of source data within buffer thses need to be 128 bit word aligned */ | |
64 | u32 ulSrcX1; | |
65 | u32 ulSrcY1; | |
66 | u32 ulSrcX2; | |
67 | u32 ulSrcY2; | |
68 | ||
69 | /* on-screen pixel position of overlay */ | |
70 | s32 lDstX1; | |
71 | s32 lDstY1; | |
72 | s32 lDstX2; | |
73 | s32 lDstY2; | |
74 | } OVRL_SRC_DEST; | |
75 | ||
76 | static u32 ovlWidth, ovlHeight, ovlStride; | |
77 | static int ovlLinear; | |
78 | ||
79 | void ResetOverlayRegisters(volatile STG4000REG __iomem *pSTGReg) | |
80 | { | |
81 | u32 tmp; | |
82 | ||
83 | /* Set Overlay address to default */ | |
84 | tmp = STG_READ_REG(DACOverlayAddr); | |
85 | CLEAR_BITS_FRM_TO(0, 20); | |
86 | CLEAR_BIT(31); | |
87 | STG_WRITE_REG(DACOverlayAddr, tmp); | |
88 | ||
89 | /* Set Overlay U address */ | |
90 | tmp = STG_READ_REG(DACOverlayUAddr); | |
91 | CLEAR_BITS_FRM_TO(0, 20); | |
92 | STG_WRITE_REG(DACOverlayUAddr, tmp); | |
93 | ||
94 | /* Set Overlay V address */ | |
95 | tmp = STG_READ_REG(DACOverlayVAddr); | |
96 | CLEAR_BITS_FRM_TO(0, 20); | |
97 | STG_WRITE_REG(DACOverlayVAddr, tmp); | |
98 | ||
99 | /* Set Overlay Size */ | |
100 | tmp = STG_READ_REG(DACOverlaySize); | |
101 | CLEAR_BITS_FRM_TO(0, 10); | |
102 | CLEAR_BITS_FRM_TO(12, 31); | |
103 | STG_WRITE_REG(DACOverlaySize, tmp); | |
104 | ||
105 | /* Set Overlay Vt Decimation */ | |
106 | tmp = STG4000_NO_DECIMATION; | |
107 | STG_WRITE_REG(DACOverlayVtDec, tmp); | |
108 | ||
109 | /* Set Overlay format to default value */ | |
110 | tmp = STG_READ_REG(DACPixelFormat); | |
111 | CLEAR_BITS_FRM_TO(4, 7); | |
112 | CLEAR_BITS_FRM_TO(16, 22); | |
113 | STG_WRITE_REG(DACPixelFormat, tmp); | |
114 | ||
115 | /* Set Vertical scaling to default */ | |
116 | tmp = STG_READ_REG(DACVerticalScal); | |
117 | CLEAR_BITS_FRM_TO(0, 11); | |
118 | CLEAR_BITS_FRM_TO(16, 22); | |
119 | tmp |= STG4000_NO_SCALING; /* Set to no scaling */ | |
120 | STG_WRITE_REG(DACVerticalScal, tmp); | |
121 | ||
122 | /* Set Horizontal Scaling to default */ | |
123 | tmp = STG_READ_REG(DACHorizontalScal); | |
124 | CLEAR_BITS_FRM_TO(0, 11); | |
125 | CLEAR_BITS_FRM_TO(16, 17); | |
126 | tmp |= STG4000_NO_SCALING; /* Set to no scaling */ | |
127 | STG_WRITE_REG(DACHorizontalScal, tmp); | |
128 | ||
129 | /* Set Blend mode to Alpha Blend */ | |
130 | /* ????? SG 08/11/2001 Surely this isn't the alpha blend mode, | |
131 | hopefully its overwrite | |
132 | */ | |
133 | tmp = STG_READ_REG(DACBlendCtrl); | |
134 | CLEAR_BITS_FRM_TO(0, 30); | |
135 | tmp = (GRAPHICS_MODE << 28); | |
136 | STG_WRITE_REG(DACBlendCtrl, tmp); | |
137 | ||
138 | } | |
139 | ||
140 | int CreateOverlaySurface(volatile STG4000REG __iomem *pSTGReg, | |
141 | u32 inWidth, | |
142 | u32 inHeight, | |
143 | int bLinear, | |
144 | u32 ulOverlayOffset, | |
145 | u32 * retStride, u32 * retUVStride) | |
146 | { | |
147 | u32 tmp; | |
148 | u32 ulStride; | |
149 | ||
150 | if (inWidth > STG4000_OVRL_MAX_WIDTH || | |
151 | inHeight > STG4000_OVRL_MAX_HEIGHT) { | |
152 | return -EINVAL; | |
153 | } | |
154 | ||
155 | /* Stride in 16 byte words - 16Bpp */ | |
156 | if (bLinear) { | |
157 | /* Format is 16bits so num 16 byte words is width/8 */ | |
158 | if ((inWidth & 0x7) == 0) { /* inWidth % 8 */ | |
159 | ulStride = (inWidth / 8); | |
160 | } else { | |
161 | /* Round up to next 16byte boundary */ | |
162 | ulStride = ((inWidth + 8) / 8); | |
163 | } | |
164 | } else { | |
165 | /* Y component is 8bits so num 16 byte words is width/16 */ | |
166 | if ((inWidth & 0xf) == 0) { /* inWidth % 16 */ | |
167 | ulStride = (inWidth / 16); | |
168 | } else { | |
169 | /* Round up to next 16byte boundary */ | |
170 | ulStride = ((inWidth + 16) / 16); | |
171 | } | |
172 | } | |
173 | ||
174 | ||
175 | /* Set Overlay address and Format mode */ | |
176 | tmp = STG_READ_REG(DACOverlayAddr); | |
177 | CLEAR_BITS_FRM_TO(0, 20); | |
178 | if (bLinear) { | |
179 | CLEAR_BIT(31); /* Overlay format to Linear */ | |
180 | } else { | |
181 | tmp |= SET_BIT(31); /* Overlay format to Planer */ | |
182 | } | |
183 | ||
184 | /* Only bits 24:4 of the Overlay address */ | |
185 | tmp |= (ulOverlayOffset >> 4); | |
186 | STG_WRITE_REG(DACOverlayAddr, tmp); | |
187 | ||
188 | if (!bLinear) { | |
189 | u32 uvSize = | |
190 | (inWidth & 0x1) ? (inWidth + 1 / 2) : (inWidth / 2); | |
191 | u32 uvStride; | |
192 | u32 ulOffset; | |
193 | /* Y component is 8bits so num 32 byte words is width/32 */ | |
194 | if ((uvSize & 0xf) == 0) { /* inWidth % 16 */ | |
195 | uvStride = (uvSize / 16); | |
196 | } else { | |
197 | /* Round up to next 32byte boundary */ | |
198 | uvStride = ((uvSize + 16) / 16); | |
199 | } | |
200 | ||
201 | ulOffset = ulOverlayOffset + (inHeight * (ulStride * 16)); | |
202 | /* Align U,V data to 32byte boundary */ | |
203 | if ((ulOffset & 0x1f) != 0) | |
204 | ulOffset = (ulOffset + 32L) & 0xffffffE0L; | |
205 | ||
206 | tmp = STG_READ_REG(DACOverlayUAddr); | |
207 | CLEAR_BITS_FRM_TO(0, 20); | |
208 | tmp |= (ulOffset >> 4); | |
209 | STG_WRITE_REG(DACOverlayUAddr, tmp); | |
210 | ||
211 | ulOffset += (inHeight / 2) * (uvStride * 16); | |
212 | /* Align U,V data to 32byte boundary */ | |
213 | if ((ulOffset & 0x1f) != 0) | |
214 | ulOffset = (ulOffset + 32L) & 0xffffffE0L; | |
215 | ||
216 | tmp = STG_READ_REG(DACOverlayVAddr); | |
217 | CLEAR_BITS_FRM_TO(0, 20); | |
218 | tmp |= (ulOffset >> 4); | |
219 | STG_WRITE_REG(DACOverlayVAddr, tmp); | |
220 | ||
221 | *retUVStride = uvStride * 16; | |
222 | } | |
223 | ||
224 | ||
225 | /* Set Overlay YUV pixel format | |
226 | * Make sure that LUT not used - ?????? | |
227 | */ | |
228 | tmp = STG_READ_REG(DACPixelFormat); | |
229 | /* Only support Planer or UYVY linear formats */ | |
230 | CLEAR_BITS_FRM_TO(4, 9); | |
231 | STG_WRITE_REG(DACPixelFormat, tmp); | |
232 | ||
233 | ovlWidth = inWidth; | |
234 | ovlHeight = inHeight; | |
235 | ovlStride = ulStride; | |
236 | ovlLinear = bLinear; | |
237 | *retStride = ulStride << 4; /* In bytes */ | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
242 | int SetOverlayBlendMode(volatile STG4000REG __iomem *pSTGReg, | |
243 | OVRL_BLEND_MODE mode, | |
244 | u32 ulAlpha, u32 ulColorKey) | |
245 | { | |
246 | u32 tmp; | |
247 | ||
248 | tmp = STG_READ_REG(DACBlendCtrl); | |
249 | CLEAR_BITS_FRM_TO(28, 30); | |
250 | tmp |= (mode << 28); | |
251 | ||
252 | switch (mode) { | |
253 | case COLOR_KEY: | |
254 | CLEAR_BITS_FRM_TO(0, 23); | |
255 | tmp |= (ulColorKey & 0x00FFFFFF); | |
256 | break; | |
257 | ||
258 | case GLOBAL_ALPHA: | |
259 | CLEAR_BITS_FRM_TO(24, 27); | |
260 | tmp |= ((ulAlpha & 0xF) << 24); | |
261 | break; | |
262 | ||
263 | case CK_PIXEL_ALPHA: | |
264 | CLEAR_BITS_FRM_TO(0, 23); | |
265 | tmp |= (ulColorKey & 0x00FFFFFF); | |
266 | break; | |
267 | ||
268 | case CK_GLOBAL_ALPHA: | |
269 | CLEAR_BITS_FRM_TO(0, 23); | |
270 | tmp |= (ulColorKey & 0x00FFFFFF); | |
271 | CLEAR_BITS_FRM_TO(24, 27); | |
272 | tmp |= ((ulAlpha & 0xF) << 24); | |
273 | break; | |
274 | ||
275 | case GRAPHICS_MODE: | |
276 | case PER_PIXEL_ALPHA: | |
277 | break; | |
278 | ||
279 | default: | |
280 | return -EINVAL; | |
281 | } | |
282 | ||
283 | STG_WRITE_REG(DACBlendCtrl, tmp); | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
288 | void EnableOverlayPlane(volatile STG4000REG __iomem *pSTGReg) | |
289 | { | |
290 | u32 tmp; | |
291 | /* Enable Overlay */ | |
292 | tmp = STG_READ_REG(DACPixelFormat); | |
293 | tmp |= SET_BIT(7); | |
294 | STG_WRITE_REG(DACPixelFormat, tmp); | |
295 | ||
296 | /* Set video stream control */ | |
297 | tmp = STG_READ_REG(DACStreamCtrl); | |
298 | tmp |= SET_BIT(1); /* video stream */ | |
299 | STG_WRITE_REG(DACStreamCtrl, tmp); | |
300 | } | |
301 | ||
302 | static u32 Overlap(u32 ulBits, u32 ulPattern) | |
303 | { | |
304 | u32 ulCount = 0; | |
305 | ||
306 | while (ulBits) { | |
307 | if (!(ulPattern & 1)) | |
308 | ulCount++; | |
309 | ulBits--; | |
310 | ulPattern = ulPattern >> 1; | |
311 | } | |
312 | ||
313 | return ulCount; | |
314 | ||
315 | } | |
316 | ||
317 | int SetOverlayViewPort(volatile STG4000REG __iomem *pSTGReg, | |
318 | u32 left, u32 top, | |
319 | u32 right, u32 bottom) | |
320 | { | |
321 | OVRL_SRC_DEST srcDest; | |
322 | ||
323 | u32 ulSrcTop, ulSrcBottom; | |
324 | u32 ulSrc, ulDest; | |
325 | u32 ulFxScale, ulFxOffset; | |
326 | u32 ulHeight, ulWidth; | |
327 | u32 ulPattern; | |
328 | u32 ulDecimate, ulDecimated; | |
329 | u32 ulApplied; | |
330 | u32 ulDacXScale, ulDacYScale; | |
331 | u32 ulScale; | |
332 | u32 ulLeft, ulRight; | |
333 | u32 ulSrcLeft, ulSrcRight; | |
334 | u32 ulScaleLeft, ulScaleRight; | |
335 | u32 ulhDecim; | |
336 | u32 ulsVal; | |
337 | u32 ulVertDecFactor; | |
338 | int bResult; | |
339 | u32 ulClipOff = 0; | |
340 | u32 ulBits = 0; | |
341 | u32 ulsAdd = 0; | |
342 | u32 tmp, ulStride; | |
343 | u32 ulExcessPixels, ulClip, ulExtraLines; | |
344 | ||
345 | ||
346 | srcDest.ulSrcX1 = 0; | |
347 | srcDest.ulSrcY1 = 0; | |
348 | srcDest.ulSrcX2 = ovlWidth - 1; | |
349 | srcDest.ulSrcY2 = ovlHeight - 1; | |
350 | ||
351 | srcDest.ulDstX1 = left; | |
352 | srcDest.ulDstY1 = top; | |
353 | srcDest.ulDstX2 = right; | |
354 | srcDest.ulDstY2 = bottom; | |
355 | ||
356 | srcDest.lDstX1 = srcDest.ulDstX1; | |
357 | srcDest.lDstY1 = srcDest.ulDstY1; | |
358 | srcDest.lDstX2 = srcDest.ulDstX2; | |
359 | srcDest.lDstY2 = srcDest.ulDstY2; | |
360 | ||
361 | /************* Vertical decimation/scaling ******************/ | |
362 | ||
363 | /* Get Src Top and Bottom */ | |
364 | ulSrcTop = srcDest.ulSrcY1; | |
365 | ulSrcBottom = srcDest.ulSrcY2; | |
366 | ||
367 | ulSrc = ulSrcBottom - ulSrcTop; | |
368 | ulDest = srcDest.lDstY2 - srcDest.lDstY1; /* on-screen overlay */ | |
369 | ||
370 | if (ulSrc <= 1) | |
371 | return -EINVAL; | |
372 | ||
373 | /* First work out the position we are to display as offset from the | |
374 | * source of the buffer | |
375 | */ | |
376 | ulFxScale = (ulDest << 11) / ulSrc; /* fixed point scale factor */ | |
377 | ulFxOffset = (srcDest.lDstY2 - srcDest.ulDstY2) << 11; | |
378 | ||
379 | ulSrcBottom = ulSrcBottom - (ulFxOffset / ulFxScale); | |
380 | ulSrc = ulSrcBottom - ulSrcTop; | |
381 | ulHeight = ulSrc; | |
382 | ||
383 | ulDest = srcDest.ulDstY2 - (srcDest.ulDstY1 - 1); | |
384 | ulPattern = adwDecim8[ulBits]; | |
385 | ||
386 | /* At this point ulSrc represents the input decimator */ | |
387 | if (ulSrc > ulDest) { | |
388 | ulDecimate = ulSrc - ulDest; | |
389 | ulBits = 0; | |
390 | ulApplied = ulSrc / 32; | |
391 | ||
392 | while (((ulBits * ulApplied) + | |
393 | Overlap((ulSrc % 32), | |
394 | adwDecim8[ulBits])) < ulDecimate) | |
395 | ulBits++; | |
396 | ||
397 | ulPattern = adwDecim8[ulBits]; | |
398 | ulDecimated = | |
399 | (ulBits * ulApplied) + Overlap((ulSrc % 32), | |
400 | ulPattern); | |
401 | ulSrc = ulSrc - ulDecimated; /* the number number of lines that will go into the scaler */ | |
402 | } | |
403 | ||
404 | if (ulBits && (ulBits != 32)) { | |
405 | ulVertDecFactor = (63 - ulBits) / (32 - ulBits); /* vertical decimation factor scaled up to nearest integer */ | |
406 | } else { | |
407 | ulVertDecFactor = 1; | |
408 | } | |
409 | ||
410 | ulDacYScale = ((ulSrc - 1) * 2048) / (ulDest + 1); | |
411 | ||
412 | tmp = STG_READ_REG(DACOverlayVtDec); /* Decimation */ | |
413 | CLEAR_BITS_FRM_TO(0, 31); | |
414 | tmp = ulPattern; | |
415 | STG_WRITE_REG(DACOverlayVtDec, tmp); | |
416 | ||
417 | /***************** Horizontal decimation/scaling ***************************/ | |
418 | ||
419 | /* | |
25985edc | 420 | * Now we handle the horizontal case, this is a simplified version of |
1da177e4 LT |
421 | * the vertical case in that we decimate by factors of 2. as we are |
422 | * working in words we should always be able to decimate by these | |
423 | * factors. as we always have to have a buffer which is aligned to a | |
424 | * whole number of 128 bit words, we must align the left side to the | |
425 | * lowest to the next lowest 128 bit boundary, and the right hand edge | |
426 | * to the next largets boundary, (in a similar way to how we didi it in | |
427 | * PMX1) as the left and right hand edges are aligned to these | |
428 | * boundaries normally this only becomes an issue when we are chopping | |
429 | * of one of the sides We shall work out vertical stuff first | |
430 | */ | |
431 | ulSrc = srcDest.ulSrcX2 - srcDest.ulSrcX1; | |
432 | ulDest = srcDest.lDstX2 - srcDest.lDstX1; | |
433 | #ifdef _OLDCODE | |
434 | ulLeft = srcDest.ulDstX1; | |
435 | ulRight = srcDest.ulDstX2; | |
436 | #else | |
437 | if (srcDest.ulDstX1 > 2) { | |
438 | ulLeft = srcDest.ulDstX1 + 2; | |
439 | ulRight = srcDest.ulDstX2 + 1; | |
440 | } else { | |
441 | ulLeft = srcDest.ulDstX1; | |
442 | ulRight = srcDest.ulDstX2 + 1; | |
443 | } | |
444 | #endif | |
445 | /* first work out the position we are to display as offset from the source of the buffer */ | |
446 | bResult = 1; | |
447 | ||
448 | do { | |
449 | if (ulDest == 0) | |
450 | return -EINVAL; | |
451 | ||
452 | /* source pixels per dest pixel <<11 */ | |
453 | ulFxScale = ((ulSrc - 1) << 11) / (ulDest); | |
454 | ||
455 | /* then number of destination pixels out we are */ | |
456 | ulFxOffset = ulFxScale * ((srcDest.ulDstX1 - srcDest.lDstX1) + ulClipOff); | |
457 | ulFxOffset >>= 11; | |
458 | ||
459 | /* this replaces the code which was making a decision as to use either ulFxOffset or ulSrcX1 */ | |
460 | ulSrcLeft = srcDest.ulSrcX1 + ulFxOffset; | |
461 | ||
462 | /* then number of destination pixels out we are */ | |
463 | ulFxOffset = ulFxScale * (srcDest.lDstX2 - srcDest.ulDstX2); | |
464 | ulFxOffset >>= 11; | |
465 | ||
466 | ulSrcRight = srcDest.ulSrcX2 - ulFxOffset; | |
467 | ||
468 | /* | |
469 | * we must align these to our 128 bit boundaries. we shall | |
470 | * round down the pixel pos to the nearest 8 pixels. | |
471 | */ | |
472 | ulScaleLeft = ulSrcLeft; | |
473 | ulScaleRight = ulSrcRight; | |
474 | ||
475 | /* shift fxscale until it is in the range of the scaler */ | |
476 | ulhDecim = 0; | |
477 | ulScale = (((ulSrcRight - ulSrcLeft) - 1) << (11 - ulhDecim)) / (ulRight - ulLeft + 2); | |
478 | ||
479 | while (ulScale > 0x800) { | |
480 | ulhDecim++; | |
481 | ulScale = (((ulSrcRight - ulSrcLeft) - 1) << (11 - ulhDecim)) / (ulRight - ulLeft + 2); | |
482 | } | |
483 | ||
484 | /* | |
485 | * to try and get the best values We first try and use | |
486 | * src/dwdest for the scale factor, then we move onto src-1 | |
487 | * | |
488 | * we want to check to see if we will need to clip data, if so | |
489 | * then we should clip our source so that we don't need to | |
490 | */ | |
491 | if (!ovlLinear) { | |
492 | ulSrcLeft &= ~0x1f; | |
493 | ||
494 | /* | |
495 | * we must align the right hand edge to the next 32 | |
496 | * pixel` boundary, must be on a 256 boundary so u, and | |
497 | * v are 128 bit aligned | |
498 | */ | |
499 | ulSrcRight = (ulSrcRight + 0x1f) & ~0x1f; | |
500 | } else { | |
501 | ulSrcLeft &= ~0x7; | |
502 | ||
503 | /* | |
504 | * we must align the right hand edge to the next | |
505 | * 8pixel` boundary | |
506 | */ | |
507 | ulSrcRight = (ulSrcRight + 0x7) & ~0x7; | |
508 | } | |
509 | ||
510 | /* this is the input size line store needs to cope with */ | |
511 | ulWidth = ulSrcRight - ulSrcLeft; | |
512 | ||
513 | /* | |
514 | * use unclipped value to work out scale factror this is the | |
515 | * scale factor we want we shall now work out the horizonal | |
516 | * decimation and scaling | |
517 | */ | |
518 | ulsVal = ((ulWidth / 8) >> ulhDecim); | |
519 | ||
520 | if ((ulWidth != (ulsVal << ulhDecim) * 8)) | |
521 | ulsAdd = 1; | |
522 | ||
523 | /* input pixels to scaler; */ | |
524 | ulSrc = ulWidth >> ulhDecim; | |
525 | ||
526 | if (ulSrc <= 2) | |
527 | return -EINVAL; | |
528 | ||
529 | ulExcessPixels = ((((ulScaleLeft - ulSrcLeft)) << (11 - ulhDecim)) / ulScale); | |
530 | ||
531 | ulClip = (ulSrc << 11) / ulScale; | |
532 | ulClip -= (ulRight - ulLeft); | |
533 | ulClip += ulExcessPixels; | |
534 | ||
535 | if (ulClip) | |
536 | ulClip--; | |
537 | ||
538 | /* We may need to do more here if we really have a HW rev < 5 */ | |
539 | } while (!bResult); | |
540 | ||
541 | ulExtraLines = (1 << ulhDecim) * ulVertDecFactor; | |
542 | ulExtraLines += 64; | |
543 | ulHeight += ulExtraLines; | |
544 | ||
545 | ulDacXScale = ulScale; | |
546 | ||
547 | ||
548 | tmp = STG_READ_REG(DACVerticalScal); | |
549 | CLEAR_BITS_FRM_TO(0, 11); | |
550 | CLEAR_BITS_FRM_TO(16, 22); /* Vertical Scaling */ | |
551 | ||
552 | /* Calculate new output line stride, this is always the number of 422 | |
553 | words in the line buffer, so it doesn't matter if the | |
554 | mode is 420. Then set the vertical scale register. | |
555 | */ | |
556 | ulStride = (ulWidth >> (ulhDecim + 3)) + ulsAdd; | |
557 | tmp |= ((ulStride << 16) | (ulDacYScale)); /* DAC_LS_CTRL = stride */ | |
558 | STG_WRITE_REG(DACVerticalScal, tmp); | |
559 | ||
560 | /* Now set up the overlay size using the modified width and height | |
561 | from decimate and scaling calculations | |
562 | */ | |
563 | tmp = STG_READ_REG(DACOverlaySize); | |
564 | CLEAR_BITS_FRM_TO(0, 10); | |
565 | CLEAR_BITS_FRM_TO(12, 31); | |
566 | ||
567 | if (ovlLinear) { | |
568 | tmp |= | |
569 | (ovlStride | ((ulHeight + 1) << 12) | | |
570 | (((ulWidth / 8) - 1) << 23)); | |
571 | } else { | |
572 | tmp |= | |
573 | (ovlStride | ((ulHeight + 1) << 12) | | |
574 | (((ulWidth / 32) - 1) << 23)); | |
575 | } | |
576 | ||
577 | STG_WRITE_REG(DACOverlaySize, tmp); | |
578 | ||
579 | /* Set Video Window Start */ | |
580 | tmp = ((ulLeft << 16)) | (srcDest.ulDstY1); | |
581 | STG_WRITE_REG(DACVidWinStart, tmp); | |
582 | ||
583 | /* Set Video Window End */ | |
584 | tmp = ((ulRight) << 16) | (srcDest.ulDstY2); | |
585 | STG_WRITE_REG(DACVidWinEnd, tmp); | |
586 | ||
587 | /* Finally set up the rest of the overlay regs in the order | |
588 | done in the IMG driver | |
589 | */ | |
590 | tmp = STG_READ_REG(DACPixelFormat); | |
591 | tmp = ((ulExcessPixels << 16) | tmp) & 0x7fffffff; | |
592 | STG_WRITE_REG(DACPixelFormat, tmp); | |
593 | ||
594 | tmp = STG_READ_REG(DACHorizontalScal); | |
595 | CLEAR_BITS_FRM_TO(0, 11); | |
596 | CLEAR_BITS_FRM_TO(16, 17); | |
597 | tmp |= ((ulhDecim << 16) | (ulDacXScale)); | |
598 | STG_WRITE_REG(DACHorizontalScal, tmp); | |
599 | ||
600 | return 0; | |
601 | } |