1 /*
2 * Copyright (c) 2011 - 2012 Samsung Electronics Co., Ltd.
3 * http://www.samsung.com
4 *
5 * Samsung EXYNOS5 SoC series G-Scaler driver
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published
9 * by the Free Software Foundation, either version 2 of the License,
10 * or (at your option) any later version.
11 */
12
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/types.h>
16 #include <linux/errno.h>
17 #include <linux/bug.h>
18 #include <linux/interrupt.h>
19 #include <linux/workqueue.h>
20 #include <linux/device.h>
21 #include <linux/platform_device.h>
22 #include <linux/list.h>
23 #include <linux/io.h>
24 #include <linux/slab.h>
25 #include <linux/clk.h>
26 #include <linux/of.h>
27 #include <media/v4l2-ioctl.h>
28
29 #include "gsc-core.h"
30
31 #define GSC_CLOCK_GATE_NAME "gscl"
32
33 static const struct gsc_fmt gsc_formats[] = {
34 {
35 .name = "RGB565",
36 .pixelformat = V4L2_PIX_FMT_RGB565X,
37 .depth = { 16 },
38 .color = GSC_RGB,
39 .num_planes = 1,
40 .num_comp = 1,
41 }, {
42 .name = "XRGB-8-8-8-8, 32 bpp",
43 .pixelformat = V4L2_PIX_FMT_RGB32,
44 .depth = { 32 },
45 .color = GSC_RGB,
46 .num_planes = 1,
47 .num_comp = 1,
48 }, {
49 .name = "YUV 4:2:2 packed, YCbYCr",
50 .pixelformat = V4L2_PIX_FMT_YUYV,
51 .depth = { 16 },
52 .color = GSC_YUV422,
53 .yorder = GSC_LSB_Y,
54 .corder = GSC_CBCR,
55 .num_planes = 1,
56 .num_comp = 1,
57 .mbus_code = V4L2_MBUS_FMT_YUYV8_2X8,
58 }, {
59 .name = "YUV 4:2:2 packed, CbYCrY",
60 .pixelformat = V4L2_PIX_FMT_UYVY,
61 .depth = { 16 },
62 .color = GSC_YUV422,
63 .yorder = GSC_LSB_C,
64 .corder = GSC_CBCR,
65 .num_planes = 1,
66 .num_comp = 1,
67 .mbus_code = V4L2_MBUS_FMT_UYVY8_2X8,
68 }, {
69 .name = "YUV 4:2:2 packed, CrYCbY",
70 .pixelformat = V4L2_PIX_FMT_VYUY,
71 .depth = { 16 },
72 .color = GSC_YUV422,
73 .yorder = GSC_LSB_C,
74 .corder = GSC_CRCB,
75 .num_planes = 1,
76 .num_comp = 1,
77 .mbus_code = V4L2_MBUS_FMT_VYUY8_2X8,
78 }, {
79 .name = "YUV 4:2:2 packed, YCrYCb",
80 .pixelformat = V4L2_PIX_FMT_YVYU,
81 .depth = { 16 },
82 .color = GSC_YUV422,
83 .yorder = GSC_LSB_Y,
84 .corder = GSC_CRCB,
85 .num_planes = 1,
86 .num_comp = 1,
87 .mbus_code = V4L2_MBUS_FMT_YVYU8_2X8,
88 }, {
89 .name = "YUV 4:4:4 planar, YCbYCr",
90 .pixelformat = V4L2_PIX_FMT_YUV32,
91 .depth = { 32 },
92 .color = GSC_YUV444,
93 .yorder = GSC_LSB_Y,
94 .corder = GSC_CBCR,
95 .num_planes = 1,
96 .num_comp = 1,
97 }, {
98 .name = "YUV 4:2:2 planar, Y/Cb/Cr",
99 .pixelformat = V4L2_PIX_FMT_YUV422P,
100 .depth = { 16 },
101 .color = GSC_YUV422,
102 .yorder = GSC_LSB_Y,
103 .corder = GSC_CBCR,
104 .num_planes = 1,
105 .num_comp = 3,
106 }, {
107 .name = "YUV 4:2:2 planar, Y/CbCr",
108 .pixelformat = V4L2_PIX_FMT_NV16,
109 .depth = { 16 },
110 .color = GSC_YUV422,
111 .yorder = GSC_LSB_Y,
112 .corder = GSC_CBCR,
113 .num_planes = 1,
114 .num_comp = 2,
115 }, {
116 .name = "YUV 4:2:2 planar, Y/CrCb",
117 .pixelformat = V4L2_PIX_FMT_NV61,
118 .depth = { 16 },
119 .color = GSC_YUV422,
120 .yorder = GSC_LSB_Y,
121 .corder = GSC_CRCB,
122 .num_planes = 1,
123 .num_comp = 2,
124 }, {
125 .name = "YUV 4:2:0 planar, YCbCr",
126 .pixelformat = V4L2_PIX_FMT_YUV420,
127 .depth = { 12 },
128 .color = GSC_YUV420,
129 .yorder = GSC_LSB_Y,
130 .corder = GSC_CBCR,
131 .num_planes = 1,
132 .num_comp = 3,
133 }, {
134 .name = "YUV 4:2:0 planar, YCrCb",
135 .pixelformat = V4L2_PIX_FMT_YVU420,
136 .depth = { 12 },
137 .color = GSC_YUV420,
138 .yorder = GSC_LSB_Y,
139 .corder = GSC_CRCB,
140 .num_planes = 1,
141 .num_comp = 3,
142
143 }, {
144 .name = "YUV 4:2:0 planar, Y/CbCr",
145 .pixelformat = V4L2_PIX_FMT_NV12,
146 .depth = { 12 },
147 .color = GSC_YUV420,
148 .yorder = GSC_LSB_Y,
149 .corder = GSC_CBCR,
150 .num_planes = 1,
151 .num_comp = 2,
152 }, {
153 .name = "YUV 4:2:0 planar, Y/CrCb",
154 .pixelformat = V4L2_PIX_FMT_NV21,
155 .depth = { 12 },
156 .color = GSC_YUV420,
157 .yorder = GSC_LSB_Y,
158 .corder = GSC_CRCB,
159 .num_planes = 1,
160 .num_comp = 2,
161 }, {
162 .name = "YUV 4:2:0 non-contig. 2p, Y/CbCr",
163 .pixelformat = V4L2_PIX_FMT_NV12M,
164 .depth = { 8, 4 },
165 .color = GSC_YUV420,
166 .yorder = GSC_LSB_Y,
167 .corder = GSC_CBCR,
168 .num_planes = 2,
169 .num_comp = 2,
170 }, {
171 .name = "YUV 4:2:0 non-contig. 3p, Y/Cb/Cr",
172 .pixelformat = V4L2_PIX_FMT_YUV420M,
173 .depth = { 8, 2, 2 },
174 .color = GSC_YUV420,
175 .yorder = GSC_LSB_Y,
176 .corder = GSC_CBCR,
177 .num_planes = 3,
178 .num_comp = 3,
179 }, {
180 .name = "YUV 4:2:0 non-contig. 3p, Y/Cr/Cb",
181 .pixelformat = V4L2_PIX_FMT_YVU420M,
182 .depth = { 8, 2, 2 },
183 .color = GSC_YUV420,
184 .yorder = GSC_LSB_Y,
185 .corder = GSC_CRCB,
186 .num_planes = 3,
187 .num_comp = 3,
188 }, {
189 .name = "YUV 4:2:0 n.c. 2p, Y/CbCr tiled",
190 .pixelformat = V4L2_PIX_FMT_NV12MT_16X16,
191 .depth = { 8, 4 },
192 .color = GSC_YUV420,
193 .yorder = GSC_LSB_Y,
194 .corder = GSC_CBCR,
195 .num_planes = 2,
196 .num_comp = 2,
197 }
198 };
199
get_format(int index)200 const struct gsc_fmt *get_format(int index)
201 {
202 if (index >= ARRAY_SIZE(gsc_formats))
203 return NULL;
204
205 return (struct gsc_fmt *)&gsc_formats[index];
206 }
207
find_fmt(u32 * pixelformat,u32 * mbus_code,u32 index)208 const struct gsc_fmt *find_fmt(u32 *pixelformat, u32 *mbus_code, u32 index)
209 {
210 const struct gsc_fmt *fmt, *def_fmt = NULL;
211 unsigned int i;
212
213 if (index >= ARRAY_SIZE(gsc_formats))
214 return NULL;
215
216 for (i = 0; i < ARRAY_SIZE(gsc_formats); ++i) {
217 fmt = get_format(i);
218 if (pixelformat && fmt->pixelformat == *pixelformat)
219 return fmt;
220 if (mbus_code && fmt->mbus_code == *mbus_code)
221 return fmt;
222 if (index == i)
223 def_fmt = fmt;
224 }
225 return def_fmt;
226
227 }
228
gsc_set_frame_size(struct gsc_frame * frame,int width,int height)229 void gsc_set_frame_size(struct gsc_frame *frame, int width, int height)
230 {
231 frame->f_width = width;
232 frame->f_height = height;
233 frame->crop.width = width;
234 frame->crop.height = height;
235 frame->crop.left = 0;
236 frame->crop.top = 0;
237 }
238
gsc_cal_prescaler_ratio(struct gsc_variant * var,u32 src,u32 dst,u32 * ratio)239 int gsc_cal_prescaler_ratio(struct gsc_variant *var, u32 src, u32 dst,
240 u32 *ratio)
241 {
242 if ((dst > src) || (dst >= src / var->poly_sc_down_max)) {
243 *ratio = 1;
244 return 0;
245 }
246
247 if ((src / var->poly_sc_down_max / var->pre_sc_down_max) > dst) {
248 pr_err("Exceeded maximum downscaling ratio (1/16))");
249 return -EINVAL;
250 }
251
252 *ratio = (dst > (src / 8)) ? 2 : 4;
253
254 return 0;
255 }
256
gsc_get_prescaler_shfactor(u32 hratio,u32 vratio,u32 * sh)257 void gsc_get_prescaler_shfactor(u32 hratio, u32 vratio, u32 *sh)
258 {
259 if (hratio == 4 && vratio == 4)
260 *sh = 4;
261 else if ((hratio == 4 && vratio == 2) ||
262 (hratio == 2 && vratio == 4))
263 *sh = 3;
264 else if ((hratio == 4 && vratio == 1) ||
265 (hratio == 1 && vratio == 4) ||
266 (hratio == 2 && vratio == 2))
267 *sh = 2;
268 else if (hratio == 1 && vratio == 1)
269 *sh = 0;
270 else
271 *sh = 1;
272 }
273
gsc_check_src_scale_info(struct gsc_variant * var,struct gsc_frame * s_frame,u32 * wratio,u32 tx,u32 ty,u32 * hratio)274 void gsc_check_src_scale_info(struct gsc_variant *var,
275 struct gsc_frame *s_frame, u32 *wratio,
276 u32 tx, u32 ty, u32 *hratio)
277 {
278 int remainder = 0, walign, halign;
279
280 if (is_yuv420(s_frame->fmt->color)) {
281 walign = GSC_SC_ALIGN_4;
282 halign = GSC_SC_ALIGN_4;
283 } else if (is_yuv422(s_frame->fmt->color)) {
284 walign = GSC_SC_ALIGN_4;
285 halign = GSC_SC_ALIGN_2;
286 } else {
287 walign = GSC_SC_ALIGN_2;
288 halign = GSC_SC_ALIGN_2;
289 }
290
291 remainder = s_frame->crop.width % (*wratio * walign);
292 if (remainder) {
293 s_frame->crop.width -= remainder;
294 gsc_cal_prescaler_ratio(var, s_frame->crop.width, tx, wratio);
295 pr_info("cropped src width size is recalculated from %d to %d",
296 s_frame->crop.width + remainder, s_frame->crop.width);
297 }
298
299 remainder = s_frame->crop.height % (*hratio * halign);
300 if (remainder) {
301 s_frame->crop.height -= remainder;
302 gsc_cal_prescaler_ratio(var, s_frame->crop.height, ty, hratio);
303 pr_info("cropped src height size is recalculated from %d to %d",
304 s_frame->crop.height + remainder, s_frame->crop.height);
305 }
306 }
307
gsc_enum_fmt_mplane(struct v4l2_fmtdesc * f)308 int gsc_enum_fmt_mplane(struct v4l2_fmtdesc *f)
309 {
310 const struct gsc_fmt *fmt;
311
312 fmt = find_fmt(NULL, NULL, f->index);
313 if (!fmt)
314 return -EINVAL;
315
316 strlcpy(f->description, fmt->name, sizeof(f->description));
317 f->pixelformat = fmt->pixelformat;
318
319 return 0;
320 }
321
get_plane_info(struct gsc_frame * frm,u32 addr,u32 * index)322 static u32 get_plane_info(struct gsc_frame *frm, u32 addr, u32 *index)
323 {
324 if (frm->addr.y == addr) {
325 *index = 0;
326 return frm->addr.y;
327 } else if (frm->addr.cb == addr) {
328 *index = 1;
329 return frm->addr.cb;
330 } else if (frm->addr.cr == addr) {
331 *index = 2;
332 return frm->addr.cr;
333 } else {
334 pr_err("Plane address is wrong");
335 return -EINVAL;
336 }
337 }
338
gsc_set_prefbuf(struct gsc_dev * gsc,struct gsc_frame * frm)339 void gsc_set_prefbuf(struct gsc_dev *gsc, struct gsc_frame *frm)
340 {
341 u32 f_chk_addr, f_chk_len, s_chk_addr, s_chk_len;
342 f_chk_addr = f_chk_len = s_chk_addr = s_chk_len = 0;
343
344 f_chk_addr = frm->addr.y;
345 f_chk_len = frm->payload[0];
346 if (frm->fmt->num_planes == 2) {
347 s_chk_addr = frm->addr.cb;
348 s_chk_len = frm->payload[1];
349 } else if (frm->fmt->num_planes == 3) {
350 u32 low_addr, low_plane, mid_addr, mid_plane;
351 u32 high_addr, high_plane;
352 u32 t_min, t_max;
353
354 t_min = min3(frm->addr.y, frm->addr.cb, frm->addr.cr);
355 low_addr = get_plane_info(frm, t_min, &low_plane);
356 t_max = max3(frm->addr.y, frm->addr.cb, frm->addr.cr);
357 high_addr = get_plane_info(frm, t_max, &high_plane);
358
359 mid_plane = 3 - (low_plane + high_plane);
360 if (mid_plane == 0)
361 mid_addr = frm->addr.y;
362 else if (mid_plane == 1)
363 mid_addr = frm->addr.cb;
364 else if (mid_plane == 2)
365 mid_addr = frm->addr.cr;
366 else
367 return;
368
369 f_chk_addr = low_addr;
370 if (mid_addr + frm->payload[mid_plane] - low_addr >
371 high_addr + frm->payload[high_plane] - mid_addr) {
372 f_chk_len = frm->payload[low_plane];
373 s_chk_addr = mid_addr;
374 s_chk_len = high_addr +
375 frm->payload[high_plane] - mid_addr;
376 } else {
377 f_chk_len = mid_addr +
378 frm->payload[mid_plane] - low_addr;
379 s_chk_addr = high_addr;
380 s_chk_len = frm->payload[high_plane];
381 }
382 }
383 pr_debug("f_addr = 0x%08x, f_len = %d, s_addr = 0x%08x, s_len = %d\n",
384 f_chk_addr, f_chk_len, s_chk_addr, s_chk_len);
385 }
386
gsc_try_fmt_mplane(struct gsc_ctx * ctx,struct v4l2_format * f)387 int gsc_try_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
388 {
389 struct gsc_dev *gsc = ctx->gsc_dev;
390 struct gsc_variant *variant = gsc->variant;
391 struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
392 const struct gsc_fmt *fmt;
393 u32 max_w, max_h, mod_x, mod_y;
394 u32 min_w, min_h, tmp_w, tmp_h;
395 int i;
396
397 pr_debug("user put w: %d, h: %d", pix_mp->width, pix_mp->height);
398
399 fmt = find_fmt(&pix_mp->pixelformat, NULL, 0);
400 if (!fmt) {
401 pr_err("pixelformat format (0x%X) invalid\n",
402 pix_mp->pixelformat);
403 return -EINVAL;
404 }
405
406 if (pix_mp->field == V4L2_FIELD_ANY)
407 pix_mp->field = V4L2_FIELD_NONE;
408 else if (pix_mp->field != V4L2_FIELD_NONE) {
409 pr_err("Not supported field order(%d)\n", pix_mp->field);
410 return -EINVAL;
411 }
412
413 max_w = variant->pix_max->target_rot_dis_w;
414 max_h = variant->pix_max->target_rot_dis_h;
415
416 mod_x = ffs(variant->pix_align->org_w) - 1;
417 if (is_yuv420(fmt->color))
418 mod_y = ffs(variant->pix_align->org_h) - 1;
419 else
420 mod_y = ffs(variant->pix_align->org_h) - 2;
421
422 if (V4L2_TYPE_IS_OUTPUT(f->type)) {
423 min_w = variant->pix_min->org_w;
424 min_h = variant->pix_min->org_h;
425 } else {
426 min_w = variant->pix_min->target_rot_dis_w;
427 min_h = variant->pix_min->target_rot_dis_h;
428 }
429
430 pr_debug("mod_x: %d, mod_y: %d, max_w: %d, max_h = %d",
431 mod_x, mod_y, max_w, max_h);
432
433 /* To check if image size is modified to adjust parameter against
434 hardware abilities */
435 tmp_w = pix_mp->width;
436 tmp_h = pix_mp->height;
437
438 v4l_bound_align_image(&pix_mp->width, min_w, max_w, mod_x,
439 &pix_mp->height, min_h, max_h, mod_y, 0);
440 if (tmp_w != pix_mp->width || tmp_h != pix_mp->height)
441 pr_info("Image size has been modified from %dx%d to %dx%d",
442 tmp_w, tmp_h, pix_mp->width, pix_mp->height);
443
444 pix_mp->num_planes = fmt->num_planes;
445
446 if (pix_mp->width >= 1280) /* HD */
447 pix_mp->colorspace = V4L2_COLORSPACE_REC709;
448 else /* SD */
449 pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
450
451
452 for (i = 0; i < pix_mp->num_planes; ++i) {
453 int bpl = (pix_mp->width * fmt->depth[i]) >> 3;
454 pix_mp->plane_fmt[i].bytesperline = bpl;
455 pix_mp->plane_fmt[i].sizeimage = bpl * pix_mp->height;
456
457 pr_debug("[%d]: bpl: %d, sizeimage: %d",
458 i, bpl, pix_mp->plane_fmt[i].sizeimage);
459 }
460
461 return 0;
462 }
463
gsc_g_fmt_mplane(struct gsc_ctx * ctx,struct v4l2_format * f)464 int gsc_g_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
465 {
466 struct gsc_frame *frame;
467 struct v4l2_pix_format_mplane *pix_mp;
468 int i;
469
470 frame = ctx_get_frame(ctx, f->type);
471 if (IS_ERR(frame))
472 return PTR_ERR(frame);
473
474 pix_mp = &f->fmt.pix_mp;
475
476 pix_mp->width = frame->f_width;
477 pix_mp->height = frame->f_height;
478 pix_mp->field = V4L2_FIELD_NONE;
479 pix_mp->pixelformat = frame->fmt->pixelformat;
480 pix_mp->colorspace = V4L2_COLORSPACE_REC709;
481 pix_mp->num_planes = frame->fmt->num_planes;
482
483 for (i = 0; i < pix_mp->num_planes; ++i) {
484 pix_mp->plane_fmt[i].bytesperline = (frame->f_width *
485 frame->fmt->depth[i]) / 8;
486 pix_mp->plane_fmt[i].sizeimage =
487 pix_mp->plane_fmt[i].bytesperline * frame->f_height;
488 }
489
490 return 0;
491 }
492
gsc_check_crop_change(u32 tmp_w,u32 tmp_h,u32 * w,u32 * h)493 void gsc_check_crop_change(u32 tmp_w, u32 tmp_h, u32 *w, u32 *h)
494 {
495 if (tmp_w != *w || tmp_h != *h) {
496 pr_info("Cropped size has been modified from %dx%d to %dx%d",
497 *w, *h, tmp_w, tmp_h);
498 *w = tmp_w;
499 *h = tmp_h;
500 }
501 }
502
gsc_g_crop(struct gsc_ctx * ctx,struct v4l2_crop * cr)503 int gsc_g_crop(struct gsc_ctx *ctx, struct v4l2_crop *cr)
504 {
505 struct gsc_frame *frame;
506
507 frame = ctx_get_frame(ctx, cr->type);
508 if (IS_ERR(frame))
509 return PTR_ERR(frame);
510
511 cr->c = frame->crop;
512
513 return 0;
514 }
515
gsc_try_crop(struct gsc_ctx * ctx,struct v4l2_crop * cr)516 int gsc_try_crop(struct gsc_ctx *ctx, struct v4l2_crop *cr)
517 {
518 struct gsc_frame *f;
519 struct gsc_dev *gsc = ctx->gsc_dev;
520 struct gsc_variant *variant = gsc->variant;
521 u32 mod_x = 0, mod_y = 0, tmp_w, tmp_h;
522 u32 min_w, min_h, max_w, max_h;
523
524 if (cr->c.top < 0 || cr->c.left < 0) {
525 pr_err("doesn't support negative values for top & left\n");
526 return -EINVAL;
527 }
528 pr_debug("user put w: %d, h: %d", cr->c.width, cr->c.height);
529
530 if (cr->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
531 f = &ctx->d_frame;
532 else if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
533 f = &ctx->s_frame;
534 else
535 return -EINVAL;
536
537 max_w = f->f_width;
538 max_h = f->f_height;
539 tmp_w = cr->c.width;
540 tmp_h = cr->c.height;
541
542 if (V4L2_TYPE_IS_OUTPUT(cr->type)) {
543 if ((is_yuv422(f->fmt->color) && f->fmt->num_comp == 1) ||
544 is_rgb(f->fmt->color))
545 min_w = 32;
546 else
547 min_w = 64;
548 if ((is_yuv422(f->fmt->color) && f->fmt->num_comp == 3) ||
549 is_yuv420(f->fmt->color))
550 min_h = 32;
551 else
552 min_h = 16;
553 } else {
554 if (is_yuv420(f->fmt->color) || is_yuv422(f->fmt->color))
555 mod_x = ffs(variant->pix_align->target_w) - 1;
556 if (is_yuv420(f->fmt->color))
557 mod_y = ffs(variant->pix_align->target_h) - 1;
558 if (ctx->gsc_ctrls.rotate->val == 90 ||
559 ctx->gsc_ctrls.rotate->val == 270) {
560 max_w = f->f_height;
561 max_h = f->f_width;
562 min_w = variant->pix_min->target_rot_en_w;
563 min_h = variant->pix_min->target_rot_en_h;
564 tmp_w = cr->c.height;
565 tmp_h = cr->c.width;
566 } else {
567 min_w = variant->pix_min->target_rot_dis_w;
568 min_h = variant->pix_min->target_rot_dis_h;
569 }
570 }
571 pr_debug("mod_x: %d, mod_y: %d, min_w: %d, min_h = %d",
572 mod_x, mod_y, min_w, min_h);
573 pr_debug("tmp_w : %d, tmp_h : %d", tmp_w, tmp_h);
574
575 v4l_bound_align_image(&tmp_w, min_w, max_w, mod_x,
576 &tmp_h, min_h, max_h, mod_y, 0);
577
578 if (!V4L2_TYPE_IS_OUTPUT(cr->type) &&
579 (ctx->gsc_ctrls.rotate->val == 90 ||
580 ctx->gsc_ctrls.rotate->val == 270))
581 gsc_check_crop_change(tmp_h, tmp_w,
582 &cr->c.width, &cr->c.height);
583 else
584 gsc_check_crop_change(tmp_w, tmp_h,
585 &cr->c.width, &cr->c.height);
586
587
588 /* adjust left/top if cropping rectangle is out of bounds */
589 /* Need to add code to algin left value with 2's multiple */
590 if (cr->c.left + tmp_w > max_w)
591 cr->c.left = max_w - tmp_w;
592 if (cr->c.top + tmp_h > max_h)
593 cr->c.top = max_h - tmp_h;
594
595 if ((is_yuv420(f->fmt->color) || is_yuv422(f->fmt->color)) &&
596 cr->c.left & 1)
597 cr->c.left -= 1;
598
599 pr_debug("Aligned l:%d, t:%d, w:%d, h:%d, f_w: %d, f_h: %d",
600 cr->c.left, cr->c.top, cr->c.width, cr->c.height, max_w, max_h);
601
602 return 0;
603 }
604
gsc_check_scaler_ratio(struct gsc_variant * var,int sw,int sh,int dw,int dh,int rot,int out_path)605 int gsc_check_scaler_ratio(struct gsc_variant *var, int sw, int sh, int dw,
606 int dh, int rot, int out_path)
607 {
608 int tmp_w, tmp_h, sc_down_max;
609
610 if (out_path == GSC_DMA)
611 sc_down_max = var->sc_down_max;
612 else
613 sc_down_max = var->local_sc_down;
614
615 if (rot == 90 || rot == 270) {
616 tmp_w = dh;
617 tmp_h = dw;
618 } else {
619 tmp_w = dw;
620 tmp_h = dh;
621 }
622
623 if ((sw / tmp_w) > sc_down_max ||
624 (sh / tmp_h) > sc_down_max ||
625 (tmp_w / sw) > var->sc_up_max ||
626 (tmp_h / sh) > var->sc_up_max)
627 return -EINVAL;
628
629 return 0;
630 }
631
gsc_set_scaler_info(struct gsc_ctx * ctx)632 int gsc_set_scaler_info(struct gsc_ctx *ctx)
633 {
634 struct gsc_scaler *sc = &ctx->scaler;
635 struct gsc_frame *s_frame = &ctx->s_frame;
636 struct gsc_frame *d_frame = &ctx->d_frame;
637 struct gsc_variant *variant = ctx->gsc_dev->variant;
638 struct device *dev = &ctx->gsc_dev->pdev->dev;
639 int tx, ty;
640 int ret;
641
642 ret = gsc_check_scaler_ratio(variant, s_frame->crop.width,
643 s_frame->crop.height, d_frame->crop.width, d_frame->crop.height,
644 ctx->gsc_ctrls.rotate->val, ctx->out_path);
645 if (ret) {
646 pr_err("out of scaler range");
647 return ret;
648 }
649
650 if (ctx->gsc_ctrls.rotate->val == 90 ||
651 ctx->gsc_ctrls.rotate->val == 270) {
652 ty = d_frame->crop.width;
653 tx = d_frame->crop.height;
654 } else {
655 tx = d_frame->crop.width;
656 ty = d_frame->crop.height;
657 }
658
659 if (tx <= 0 || ty <= 0) {
660 dev_err(dev, "Invalid target size: %dx%d", tx, ty);
661 return -EINVAL;
662 }
663
664 ret = gsc_cal_prescaler_ratio(variant, s_frame->crop.width,
665 tx, &sc->pre_hratio);
666 if (ret) {
667 pr_err("Horizontal scale ratio is out of range");
668 return ret;
669 }
670
671 ret = gsc_cal_prescaler_ratio(variant, s_frame->crop.height,
672 ty, &sc->pre_vratio);
673 if (ret) {
674 pr_err("Vertical scale ratio is out of range");
675 return ret;
676 }
677
678 gsc_check_src_scale_info(variant, s_frame, &sc->pre_hratio,
679 tx, ty, &sc->pre_vratio);
680
681 gsc_get_prescaler_shfactor(sc->pre_hratio, sc->pre_vratio,
682 &sc->pre_shfactor);
683
684 sc->main_hratio = (s_frame->crop.width << 16) / tx;
685 sc->main_vratio = (s_frame->crop.height << 16) / ty;
686
687 pr_debug("scaler input/output size : sx = %d, sy = %d, tx = %d, ty = %d",
688 s_frame->crop.width, s_frame->crop.height, tx, ty);
689 pr_debug("scaler ratio info : pre_shfactor : %d, pre_h : %d",
690 sc->pre_shfactor, sc->pre_hratio);
691 pr_debug("pre_v :%d, main_h : %d, main_v : %d",
692 sc->pre_vratio, sc->main_hratio, sc->main_vratio);
693
694 return 0;
695 }
696
__gsc_s_ctrl(struct gsc_ctx * ctx,struct v4l2_ctrl * ctrl)697 static int __gsc_s_ctrl(struct gsc_ctx *ctx, struct v4l2_ctrl *ctrl)
698 {
699 struct gsc_dev *gsc = ctx->gsc_dev;
700 struct gsc_variant *variant = gsc->variant;
701 unsigned int flags = GSC_DST_FMT | GSC_SRC_FMT;
702 int ret = 0;
703
704 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
705 return 0;
706
707 switch (ctrl->id) {
708 case V4L2_CID_HFLIP:
709 ctx->hflip = ctrl->val;
710 break;
711
712 case V4L2_CID_VFLIP:
713 ctx->vflip = ctrl->val;
714 break;
715
716 case V4L2_CID_ROTATE:
717 if ((ctx->state & flags) == flags) {
718 ret = gsc_check_scaler_ratio(variant,
719 ctx->s_frame.crop.width,
720 ctx->s_frame.crop.height,
721 ctx->d_frame.crop.width,
722 ctx->d_frame.crop.height,
723 ctx->gsc_ctrls.rotate->val,
724 ctx->out_path);
725
726 if (ret)
727 return -EINVAL;
728 }
729
730 ctx->rotation = ctrl->val;
731 break;
732
733 case V4L2_CID_ALPHA_COMPONENT:
734 ctx->d_frame.alpha = ctrl->val;
735 break;
736 }
737
738 ctx->state |= GSC_PARAMS;
739 return 0;
740 }
741
gsc_s_ctrl(struct v4l2_ctrl * ctrl)742 static int gsc_s_ctrl(struct v4l2_ctrl *ctrl)
743 {
744 struct gsc_ctx *ctx = ctrl_to_ctx(ctrl);
745 unsigned long flags;
746 int ret;
747
748 spin_lock_irqsave(&ctx->gsc_dev->slock, flags);
749 ret = __gsc_s_ctrl(ctx, ctrl);
750 spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
751
752 return ret;
753 }
754
755 static const struct v4l2_ctrl_ops gsc_ctrl_ops = {
756 .s_ctrl = gsc_s_ctrl,
757 };
758
gsc_ctrls_create(struct gsc_ctx * ctx)759 int gsc_ctrls_create(struct gsc_ctx *ctx)
760 {
761 if (ctx->ctrls_rdy) {
762 pr_err("Control handler of this context was created already");
763 return 0;
764 }
765
766 v4l2_ctrl_handler_init(&ctx->ctrl_handler, GSC_MAX_CTRL_NUM);
767
768 ctx->gsc_ctrls.rotate = v4l2_ctrl_new_std(&ctx->ctrl_handler,
769 &gsc_ctrl_ops, V4L2_CID_ROTATE, 0, 270, 90, 0);
770 ctx->gsc_ctrls.hflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
771 &gsc_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
772 ctx->gsc_ctrls.vflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
773 &gsc_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
774 ctx->gsc_ctrls.global_alpha = v4l2_ctrl_new_std(&ctx->ctrl_handler,
775 &gsc_ctrl_ops, V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 0);
776
777 ctx->ctrls_rdy = ctx->ctrl_handler.error == 0;
778
779 if (ctx->ctrl_handler.error) {
780 int err = ctx->ctrl_handler.error;
781 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
782 pr_err("Failed to create G-Scaler control handlers");
783 return err;
784 }
785
786 return 0;
787 }
788
gsc_ctrls_delete(struct gsc_ctx * ctx)789 void gsc_ctrls_delete(struct gsc_ctx *ctx)
790 {
791 if (ctx->ctrls_rdy) {
792 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
793 ctx->ctrls_rdy = false;
794 }
795 }
796
797 /* The color format (num_comp, num_planes) must be already configured. */
gsc_prepare_addr(struct gsc_ctx * ctx,struct vb2_buffer * vb,struct gsc_frame * frame,struct gsc_addr * addr)798 int gsc_prepare_addr(struct gsc_ctx *ctx, struct vb2_buffer *vb,
799 struct gsc_frame *frame, struct gsc_addr *addr)
800 {
801 int ret = 0;
802 u32 pix_size;
803
804 if ((vb == NULL) || (frame == NULL))
805 return -EINVAL;
806
807 pix_size = frame->f_width * frame->f_height;
808
809 pr_debug("num_planes= %d, num_comp= %d, pix_size= %d",
810 frame->fmt->num_planes, frame->fmt->num_comp, pix_size);
811
812 addr->y = vb2_dma_contig_plane_dma_addr(vb, 0);
813
814 if (frame->fmt->num_planes == 1) {
815 switch (frame->fmt->num_comp) {
816 case 1:
817 addr->cb = 0;
818 addr->cr = 0;
819 break;
820 case 2:
821 /* decompose Y into Y/Cb */
822 addr->cb = (dma_addr_t)(addr->y + pix_size);
823 addr->cr = 0;
824 break;
825 case 3:
826 /* decompose Y into Y/Cb/Cr */
827 addr->cb = (dma_addr_t)(addr->y + pix_size);
828 if (GSC_YUV420 == frame->fmt->color)
829 addr->cr = (dma_addr_t)(addr->cb
830 + (pix_size >> 2));
831 else /* 422 */
832 addr->cr = (dma_addr_t)(addr->cb
833 + (pix_size >> 1));
834 break;
835 default:
836 pr_err("Invalid the number of color planes");
837 return -EINVAL;
838 }
839 } else {
840 if (frame->fmt->num_planes >= 2)
841 addr->cb = vb2_dma_contig_plane_dma_addr(vb, 1);
842
843 if (frame->fmt->num_planes == 3)
844 addr->cr = vb2_dma_contig_plane_dma_addr(vb, 2);
845 }
846
847 if ((frame->fmt->pixelformat == V4L2_PIX_FMT_VYUY) ||
848 (frame->fmt->pixelformat == V4L2_PIX_FMT_YVYU) ||
849 (frame->fmt->pixelformat == V4L2_PIX_FMT_YVU420) ||
850 (frame->fmt->pixelformat == V4L2_PIX_FMT_YVU420M))
851 swap(addr->cb, addr->cr);
852
853 pr_debug("ADDR: y= %pad cb= %pad cr= %pad ret= %d",
854 &addr->y, &addr->cb, &addr->cr, ret);
855
856 return ret;
857 }
858
gsc_irq_handler(int irq,void * priv)859 static irqreturn_t gsc_irq_handler(int irq, void *priv)
860 {
861 struct gsc_dev *gsc = priv;
862 struct gsc_ctx *ctx;
863 int gsc_irq;
864
865 gsc_irq = gsc_hw_get_irq_status(gsc);
866 gsc_hw_clear_irq(gsc, gsc_irq);
867
868 if (gsc_irq == GSC_IRQ_OVERRUN) {
869 pr_err("Local path input over-run interrupt has occurred!\n");
870 return IRQ_HANDLED;
871 }
872
873 spin_lock(&gsc->slock);
874
875 if (test_and_clear_bit(ST_M2M_PEND, &gsc->state)) {
876
877 gsc_hw_enable_control(gsc, false);
878
879 if (test_and_clear_bit(ST_M2M_SUSPENDING, &gsc->state)) {
880 set_bit(ST_M2M_SUSPENDED, &gsc->state);
881 wake_up(&gsc->irq_queue);
882 goto isr_unlock;
883 }
884 ctx = v4l2_m2m_get_curr_priv(gsc->m2m.m2m_dev);
885
886 if (!ctx || !ctx->m2m_ctx)
887 goto isr_unlock;
888
889 spin_unlock(&gsc->slock);
890 gsc_m2m_job_finish(ctx, VB2_BUF_STATE_DONE);
891
892 /* wake_up job_abort, stop_streaming */
893 if (ctx->state & GSC_CTX_STOP_REQ) {
894 ctx->state &= ~GSC_CTX_STOP_REQ;
895 wake_up(&gsc->irq_queue);
896 }
897 return IRQ_HANDLED;
898 }
899
900 isr_unlock:
901 spin_unlock(&gsc->slock);
902 return IRQ_HANDLED;
903 }
904
905 static struct gsc_pix_max gsc_v_100_max = {
906 .org_scaler_bypass_w = 8192,
907 .org_scaler_bypass_h = 8192,
908 .org_scaler_input_w = 4800,
909 .org_scaler_input_h = 3344,
910 .real_rot_dis_w = 4800,
911 .real_rot_dis_h = 3344,
912 .real_rot_en_w = 2047,
913 .real_rot_en_h = 2047,
914 .target_rot_dis_w = 4800,
915 .target_rot_dis_h = 3344,
916 .target_rot_en_w = 2016,
917 .target_rot_en_h = 2016,
918 };
919
920 static struct gsc_pix_min gsc_v_100_min = {
921 .org_w = 64,
922 .org_h = 32,
923 .real_w = 64,
924 .real_h = 32,
925 .target_rot_dis_w = 64,
926 .target_rot_dis_h = 32,
927 .target_rot_en_w = 32,
928 .target_rot_en_h = 16,
929 };
930
931 static struct gsc_pix_align gsc_v_100_align = {
932 .org_h = 16,
933 .org_w = 16, /* yuv420 : 16, others : 8 */
934 .offset_h = 2, /* yuv420/422 : 2, others : 1 */
935 .real_w = 16, /* yuv420/422 : 4~16, others : 2~8 */
936 .real_h = 16, /* yuv420 : 4~16, others : 1 */
937 .target_w = 2, /* yuv420/422 : 2, others : 1 */
938 .target_h = 2, /* yuv420 : 2, others : 1 */
939 };
940
941 static struct gsc_variant gsc_v_100_variant = {
942 .pix_max = &gsc_v_100_max,
943 .pix_min = &gsc_v_100_min,
944 .pix_align = &gsc_v_100_align,
945 .in_buf_cnt = 32,
946 .out_buf_cnt = 32,
947 .sc_up_max = 8,
948 .sc_down_max = 16,
949 .poly_sc_down_max = 4,
950 .pre_sc_down_max = 4,
951 .local_sc_down = 2,
952 };
953
954 static struct gsc_driverdata gsc_v_100_drvdata = {
955 .variant = {
956 [0] = &gsc_v_100_variant,
957 [1] = &gsc_v_100_variant,
958 [2] = &gsc_v_100_variant,
959 [3] = &gsc_v_100_variant,
960 },
961 .num_entities = 4,
962 .lclk_frequency = 266000000UL,
963 };
964
965 static struct platform_device_id gsc_driver_ids[] = {
966 {
967 .name = "exynos-gsc",
968 .driver_data = (unsigned long)&gsc_v_100_drvdata,
969 },
970 {},
971 };
972 MODULE_DEVICE_TABLE(platform, gsc_driver_ids);
973
974 static const struct of_device_id exynos_gsc_match[] = {
975 {
976 .compatible = "samsung,exynos5-gsc",
977 .data = &gsc_v_100_drvdata,
978 },
979 {},
980 };
981 MODULE_DEVICE_TABLE(of, exynos_gsc_match);
982
gsc_get_drv_data(struct platform_device * pdev)983 static void *gsc_get_drv_data(struct platform_device *pdev)
984 {
985 struct gsc_driverdata *driver_data = NULL;
986
987 if (pdev->dev.of_node) {
988 const struct of_device_id *match;
989 match = of_match_node(exynos_gsc_match,
990 pdev->dev.of_node);
991 if (match)
992 driver_data = (struct gsc_driverdata *)match->data;
993 } else {
994 driver_data = (struct gsc_driverdata *)
995 platform_get_device_id(pdev)->driver_data;
996 }
997
998 return driver_data;
999 }
1000
gsc_clk_put(struct gsc_dev * gsc)1001 static void gsc_clk_put(struct gsc_dev *gsc)
1002 {
1003 if (!IS_ERR(gsc->clock))
1004 clk_unprepare(gsc->clock);
1005 }
1006
gsc_clk_get(struct gsc_dev * gsc)1007 static int gsc_clk_get(struct gsc_dev *gsc)
1008 {
1009 int ret;
1010
1011 dev_dbg(&gsc->pdev->dev, "gsc_clk_get Called\n");
1012
1013 gsc->clock = devm_clk_get(&gsc->pdev->dev, GSC_CLOCK_GATE_NAME);
1014 if (IS_ERR(gsc->clock)) {
1015 dev_err(&gsc->pdev->dev, "failed to get clock~~~: %s\n",
1016 GSC_CLOCK_GATE_NAME);
1017 return PTR_ERR(gsc->clock);
1018 }
1019
1020 ret = clk_prepare(gsc->clock);
1021 if (ret < 0) {
1022 dev_err(&gsc->pdev->dev, "clock prepare failed for clock: %s\n",
1023 GSC_CLOCK_GATE_NAME);
1024 gsc->clock = ERR_PTR(-EINVAL);
1025 return ret;
1026 }
1027
1028 return 0;
1029 }
1030
gsc_m2m_suspend(struct gsc_dev * gsc)1031 static int gsc_m2m_suspend(struct gsc_dev *gsc)
1032 {
1033 unsigned long flags;
1034 int timeout;
1035
1036 spin_lock_irqsave(&gsc->slock, flags);
1037 if (!gsc_m2m_pending(gsc)) {
1038 spin_unlock_irqrestore(&gsc->slock, flags);
1039 return 0;
1040 }
1041 clear_bit(ST_M2M_SUSPENDED, &gsc->state);
1042 set_bit(ST_M2M_SUSPENDING, &gsc->state);
1043 spin_unlock_irqrestore(&gsc->slock, flags);
1044
1045 timeout = wait_event_timeout(gsc->irq_queue,
1046 test_bit(ST_M2M_SUSPENDED, &gsc->state),
1047 GSC_SHUTDOWN_TIMEOUT);
1048
1049 clear_bit(ST_M2M_SUSPENDING, &gsc->state);
1050 return timeout == 0 ? -EAGAIN : 0;
1051 }
1052
gsc_m2m_resume(struct gsc_dev * gsc)1053 static int gsc_m2m_resume(struct gsc_dev *gsc)
1054 {
1055 struct gsc_ctx *ctx;
1056 unsigned long flags;
1057
1058 spin_lock_irqsave(&gsc->slock, flags);
1059 /* Clear for full H/W setup in first run after resume */
1060 ctx = gsc->m2m.ctx;
1061 gsc->m2m.ctx = NULL;
1062 spin_unlock_irqrestore(&gsc->slock, flags);
1063
1064 if (test_and_clear_bit(ST_M2M_SUSPENDED, &gsc->state))
1065 gsc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
1066
1067 return 0;
1068 }
1069
gsc_probe(struct platform_device * pdev)1070 static int gsc_probe(struct platform_device *pdev)
1071 {
1072 struct gsc_dev *gsc;
1073 struct resource *res;
1074 struct gsc_driverdata *drv_data = gsc_get_drv_data(pdev);
1075 struct device *dev = &pdev->dev;
1076 int ret = 0;
1077
1078 gsc = devm_kzalloc(dev, sizeof(struct gsc_dev), GFP_KERNEL);
1079 if (!gsc)
1080 return -ENOMEM;
1081
1082 if (dev->of_node)
1083 gsc->id = of_alias_get_id(pdev->dev.of_node, "gsc");
1084 else
1085 gsc->id = pdev->id;
1086
1087 if (gsc->id >= drv_data->num_entities) {
1088 dev_err(dev, "Invalid platform device id: %d\n", gsc->id);
1089 return -EINVAL;
1090 }
1091
1092 gsc->variant = drv_data->variant[gsc->id];
1093 gsc->pdev = pdev;
1094 gsc->pdata = dev->platform_data;
1095
1096 init_waitqueue_head(&gsc->irq_queue);
1097 spin_lock_init(&gsc->slock);
1098 mutex_init(&gsc->lock);
1099 gsc->clock = ERR_PTR(-EINVAL);
1100
1101 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1102 gsc->regs = devm_ioremap_resource(dev, res);
1103 if (IS_ERR(gsc->regs))
1104 return PTR_ERR(gsc->regs);
1105
1106 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1107 if (!res) {
1108 dev_err(dev, "failed to get IRQ resource\n");
1109 return -ENXIO;
1110 }
1111
1112 ret = gsc_clk_get(gsc);
1113 if (ret)
1114 return ret;
1115
1116 ret = devm_request_irq(dev, res->start, gsc_irq_handler,
1117 0, pdev->name, gsc);
1118 if (ret) {
1119 dev_err(dev, "failed to install irq (%d)\n", ret);
1120 goto err_clk;
1121 }
1122
1123 ret = v4l2_device_register(dev, &gsc->v4l2_dev);
1124 if (ret)
1125 goto err_clk;
1126
1127 ret = gsc_register_m2m_device(gsc);
1128 if (ret)
1129 goto err_v4l2;
1130
1131 platform_set_drvdata(pdev, gsc);
1132 pm_runtime_enable(dev);
1133 ret = pm_runtime_get_sync(&pdev->dev);
1134 if (ret < 0)
1135 goto err_m2m;
1136
1137 /* Initialize continious memory allocator */
1138 gsc->alloc_ctx = vb2_dma_contig_init_ctx(dev);
1139 if (IS_ERR(gsc->alloc_ctx)) {
1140 ret = PTR_ERR(gsc->alloc_ctx);
1141 goto err_pm;
1142 }
1143
1144 dev_dbg(dev, "gsc-%d registered successfully\n", gsc->id);
1145
1146 pm_runtime_put(dev);
1147 return 0;
1148 err_pm:
1149 pm_runtime_put(dev);
1150 err_m2m:
1151 gsc_unregister_m2m_device(gsc);
1152 err_v4l2:
1153 v4l2_device_unregister(&gsc->v4l2_dev);
1154 err_clk:
1155 gsc_clk_put(gsc);
1156 return ret;
1157 }
1158
gsc_remove(struct platform_device * pdev)1159 static int gsc_remove(struct platform_device *pdev)
1160 {
1161 struct gsc_dev *gsc = platform_get_drvdata(pdev);
1162
1163 gsc_unregister_m2m_device(gsc);
1164 v4l2_device_unregister(&gsc->v4l2_dev);
1165
1166 vb2_dma_contig_cleanup_ctx(gsc->alloc_ctx);
1167 pm_runtime_disable(&pdev->dev);
1168 gsc_clk_put(gsc);
1169
1170 dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
1171 return 0;
1172 }
1173
gsc_runtime_resume(struct device * dev)1174 static int gsc_runtime_resume(struct device *dev)
1175 {
1176 struct gsc_dev *gsc = dev_get_drvdata(dev);
1177 int ret = 0;
1178
1179 pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1180
1181 ret = clk_enable(gsc->clock);
1182 if (ret)
1183 return ret;
1184
1185 gsc_hw_set_sw_reset(gsc);
1186 gsc_wait_reset(gsc);
1187
1188 return gsc_m2m_resume(gsc);
1189 }
1190
gsc_runtime_suspend(struct device * dev)1191 static int gsc_runtime_suspend(struct device *dev)
1192 {
1193 struct gsc_dev *gsc = dev_get_drvdata(dev);
1194 int ret = 0;
1195
1196 ret = gsc_m2m_suspend(gsc);
1197 if (!ret)
1198 clk_disable(gsc->clock);
1199
1200 pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1201 return ret;
1202 }
1203
gsc_resume(struct device * dev)1204 static int gsc_resume(struct device *dev)
1205 {
1206 struct gsc_dev *gsc = dev_get_drvdata(dev);
1207 unsigned long flags;
1208
1209 pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1210
1211 /* Do not resume if the device was idle before system suspend */
1212 spin_lock_irqsave(&gsc->slock, flags);
1213 if (!test_and_clear_bit(ST_SUSPEND, &gsc->state) ||
1214 !gsc_m2m_opened(gsc)) {
1215 spin_unlock_irqrestore(&gsc->slock, flags);
1216 return 0;
1217 }
1218 spin_unlock_irqrestore(&gsc->slock, flags);
1219
1220 if (!pm_runtime_suspended(dev))
1221 return gsc_runtime_resume(dev);
1222
1223 return 0;
1224 }
1225
gsc_suspend(struct device * dev)1226 static int gsc_suspend(struct device *dev)
1227 {
1228 struct gsc_dev *gsc = dev_get_drvdata(dev);
1229
1230 pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1231
1232 if (test_and_set_bit(ST_SUSPEND, &gsc->state))
1233 return 0;
1234
1235 if (!pm_runtime_suspended(dev))
1236 return gsc_runtime_suspend(dev);
1237
1238 return 0;
1239 }
1240
1241 static const struct dev_pm_ops gsc_pm_ops = {
1242 .suspend = gsc_suspend,
1243 .resume = gsc_resume,
1244 .runtime_suspend = gsc_runtime_suspend,
1245 .runtime_resume = gsc_runtime_resume,
1246 };
1247
1248 static struct platform_driver gsc_driver = {
1249 .probe = gsc_probe,
1250 .remove = gsc_remove,
1251 .id_table = gsc_driver_ids,
1252 .driver = {
1253 .name = GSC_MODULE_NAME,
1254 .owner = THIS_MODULE,
1255 .pm = &gsc_pm_ops,
1256 .of_match_table = exynos_gsc_match,
1257 }
1258 };
1259
1260 module_platform_driver(gsc_driver);
1261
1262 MODULE_AUTHOR("Hyunwong Kim <khw0178.kim@samsung.com>");
1263 MODULE_DESCRIPTION("Samsung EXYNOS5 Soc series G-Scaler driver");
1264 MODULE_LICENSE("GPL");
1265