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 = MEDIA_BUS_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 = MEDIA_BUS_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 = MEDIA_BUS_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 = MEDIA_BUS_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,u32 * ret_addr)322 static int get_plane_info(struct gsc_frame *frm, u32 addr, u32 *index, u32 *ret_addr)
323 {
324 if (frm->addr.y == addr) {
325 *index = 0;
326 *ret_addr = frm->addr.y;
327 } else if (frm->addr.cb == addr) {
328 *index = 1;
329 *ret_addr = frm->addr.cb;
330 } else if (frm->addr.cr == addr) {
331 *index = 2;
332 *ret_addr = frm->addr.cr;
333 } else {
334 pr_err("Plane address is wrong");
335 return -EINVAL;
336 }
337 return 0;
338 }
339
gsc_set_prefbuf(struct gsc_dev * gsc,struct gsc_frame * frm)340 void gsc_set_prefbuf(struct gsc_dev *gsc, struct gsc_frame *frm)
341 {
342 u32 f_chk_addr, f_chk_len, s_chk_addr, s_chk_len;
343 f_chk_addr = f_chk_len = s_chk_addr = s_chk_len = 0;
344
345 f_chk_addr = frm->addr.y;
346 f_chk_len = frm->payload[0];
347 if (frm->fmt->num_planes == 2) {
348 s_chk_addr = frm->addr.cb;
349 s_chk_len = frm->payload[1];
350 } else if (frm->fmt->num_planes == 3) {
351 u32 low_addr, low_plane, mid_addr, mid_plane;
352 u32 high_addr, high_plane;
353 u32 t_min, t_max;
354
355 t_min = min3(frm->addr.y, frm->addr.cb, frm->addr.cr);
356 if (get_plane_info(frm, t_min, &low_plane, &low_addr))
357 return;
358 t_max = max3(frm->addr.y, frm->addr.cb, frm->addr.cr);
359 if (get_plane_info(frm, t_max, &high_plane, &high_addr))
360 return;
361
362 mid_plane = 3 - (low_plane + high_plane);
363 if (mid_plane == 0)
364 mid_addr = frm->addr.y;
365 else if (mid_plane == 1)
366 mid_addr = frm->addr.cb;
367 else if (mid_plane == 2)
368 mid_addr = frm->addr.cr;
369 else
370 return;
371
372 f_chk_addr = low_addr;
373 if (mid_addr + frm->payload[mid_plane] - low_addr >
374 high_addr + frm->payload[high_plane] - mid_addr) {
375 f_chk_len = frm->payload[low_plane];
376 s_chk_addr = mid_addr;
377 s_chk_len = high_addr +
378 frm->payload[high_plane] - mid_addr;
379 } else {
380 f_chk_len = mid_addr +
381 frm->payload[mid_plane] - low_addr;
382 s_chk_addr = high_addr;
383 s_chk_len = frm->payload[high_plane];
384 }
385 }
386 pr_debug("f_addr = 0x%08x, f_len = %d, s_addr = 0x%08x, s_len = %d\n",
387 f_chk_addr, f_chk_len, s_chk_addr, s_chk_len);
388 }
389
gsc_try_fmt_mplane(struct gsc_ctx * ctx,struct v4l2_format * f)390 int gsc_try_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
391 {
392 struct gsc_dev *gsc = ctx->gsc_dev;
393 struct gsc_variant *variant = gsc->variant;
394 struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
395 const struct gsc_fmt *fmt;
396 u32 max_w, max_h, mod_x, mod_y;
397 u32 min_w, min_h, tmp_w, tmp_h;
398 int i;
399
400 pr_debug("user put w: %d, h: %d", pix_mp->width, pix_mp->height);
401
402 fmt = find_fmt(&pix_mp->pixelformat, NULL, 0);
403 if (!fmt) {
404 pr_err("pixelformat format (0x%X) invalid\n",
405 pix_mp->pixelformat);
406 return -EINVAL;
407 }
408
409 if (pix_mp->field == V4L2_FIELD_ANY)
410 pix_mp->field = V4L2_FIELD_NONE;
411 else if (pix_mp->field != V4L2_FIELD_NONE) {
412 pr_err("Not supported field order(%d)\n", pix_mp->field);
413 return -EINVAL;
414 }
415
416 max_w = variant->pix_max->target_rot_dis_w;
417 max_h = variant->pix_max->target_rot_dis_h;
418
419 mod_x = ffs(variant->pix_align->org_w) - 1;
420 if (is_yuv420(fmt->color))
421 mod_y = ffs(variant->pix_align->org_h) - 1;
422 else
423 mod_y = ffs(variant->pix_align->org_h) - 2;
424
425 if (V4L2_TYPE_IS_OUTPUT(f->type)) {
426 min_w = variant->pix_min->org_w;
427 min_h = variant->pix_min->org_h;
428 } else {
429 min_w = variant->pix_min->target_rot_dis_w;
430 min_h = variant->pix_min->target_rot_dis_h;
431 }
432
433 pr_debug("mod_x: %d, mod_y: %d, max_w: %d, max_h = %d",
434 mod_x, mod_y, max_w, max_h);
435
436 /* To check if image size is modified to adjust parameter against
437 hardware abilities */
438 tmp_w = pix_mp->width;
439 tmp_h = pix_mp->height;
440
441 v4l_bound_align_image(&pix_mp->width, min_w, max_w, mod_x,
442 &pix_mp->height, min_h, max_h, mod_y, 0);
443 if (tmp_w != pix_mp->width || tmp_h != pix_mp->height)
444 pr_info("Image size has been modified from %dx%d to %dx%d",
445 tmp_w, tmp_h, pix_mp->width, pix_mp->height);
446
447 pix_mp->num_planes = fmt->num_planes;
448
449 if (pix_mp->width >= 1280) /* HD */
450 pix_mp->colorspace = V4L2_COLORSPACE_REC709;
451 else /* SD */
452 pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
453
454
455 for (i = 0; i < pix_mp->num_planes; ++i) {
456 int bpl = (pix_mp->width * fmt->depth[i]) >> 3;
457 pix_mp->plane_fmt[i].bytesperline = bpl;
458 pix_mp->plane_fmt[i].sizeimage = bpl * pix_mp->height;
459
460 pr_debug("[%d]: bpl: %d, sizeimage: %d",
461 i, bpl, pix_mp->plane_fmt[i].sizeimage);
462 }
463
464 return 0;
465 }
466
gsc_g_fmt_mplane(struct gsc_ctx * ctx,struct v4l2_format * f)467 int gsc_g_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
468 {
469 struct gsc_frame *frame;
470 struct v4l2_pix_format_mplane *pix_mp;
471 int i;
472
473 frame = ctx_get_frame(ctx, f->type);
474 if (IS_ERR(frame))
475 return PTR_ERR(frame);
476
477 pix_mp = &f->fmt.pix_mp;
478
479 pix_mp->width = frame->f_width;
480 pix_mp->height = frame->f_height;
481 pix_mp->field = V4L2_FIELD_NONE;
482 pix_mp->pixelformat = frame->fmt->pixelformat;
483 pix_mp->colorspace = V4L2_COLORSPACE_REC709;
484 pix_mp->num_planes = frame->fmt->num_planes;
485
486 for (i = 0; i < pix_mp->num_planes; ++i) {
487 pix_mp->plane_fmt[i].bytesperline = (frame->f_width *
488 frame->fmt->depth[i]) / 8;
489 pix_mp->plane_fmt[i].sizeimage =
490 pix_mp->plane_fmt[i].bytesperline * frame->f_height;
491 }
492
493 return 0;
494 }
495
gsc_check_crop_change(u32 tmp_w,u32 tmp_h,u32 * w,u32 * h)496 void gsc_check_crop_change(u32 tmp_w, u32 tmp_h, u32 *w, u32 *h)
497 {
498 if (tmp_w != *w || tmp_h != *h) {
499 pr_info("Cropped size has been modified from %dx%d to %dx%d",
500 *w, *h, tmp_w, tmp_h);
501 *w = tmp_w;
502 *h = tmp_h;
503 }
504 }
505
gsc_g_crop(struct gsc_ctx * ctx,struct v4l2_crop * cr)506 int gsc_g_crop(struct gsc_ctx *ctx, struct v4l2_crop *cr)
507 {
508 struct gsc_frame *frame;
509
510 frame = ctx_get_frame(ctx, cr->type);
511 if (IS_ERR(frame))
512 return PTR_ERR(frame);
513
514 cr->c = frame->crop;
515
516 return 0;
517 }
518
gsc_try_crop(struct gsc_ctx * ctx,struct v4l2_crop * cr)519 int gsc_try_crop(struct gsc_ctx *ctx, struct v4l2_crop *cr)
520 {
521 struct gsc_frame *f;
522 struct gsc_dev *gsc = ctx->gsc_dev;
523 struct gsc_variant *variant = gsc->variant;
524 u32 mod_x = 0, mod_y = 0, tmp_w, tmp_h;
525 u32 min_w, min_h, max_w, max_h;
526
527 if (cr->c.top < 0 || cr->c.left < 0) {
528 pr_err("doesn't support negative values for top & left\n");
529 return -EINVAL;
530 }
531 pr_debug("user put w: %d, h: %d", cr->c.width, cr->c.height);
532
533 if (cr->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
534 f = &ctx->d_frame;
535 else if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
536 f = &ctx->s_frame;
537 else
538 return -EINVAL;
539
540 max_w = f->f_width;
541 max_h = f->f_height;
542 tmp_w = cr->c.width;
543 tmp_h = cr->c.height;
544
545 if (V4L2_TYPE_IS_OUTPUT(cr->type)) {
546 if ((is_yuv422(f->fmt->color) && f->fmt->num_comp == 1) ||
547 is_rgb(f->fmt->color))
548 min_w = 32;
549 else
550 min_w = 64;
551 if ((is_yuv422(f->fmt->color) && f->fmt->num_comp == 3) ||
552 is_yuv420(f->fmt->color))
553 min_h = 32;
554 else
555 min_h = 16;
556 } else {
557 if (is_yuv420(f->fmt->color) || is_yuv422(f->fmt->color))
558 mod_x = ffs(variant->pix_align->target_w) - 1;
559 if (is_yuv420(f->fmt->color))
560 mod_y = ffs(variant->pix_align->target_h) - 1;
561 if (ctx->gsc_ctrls.rotate->val == 90 ||
562 ctx->gsc_ctrls.rotate->val == 270) {
563 max_w = f->f_height;
564 max_h = f->f_width;
565 min_w = variant->pix_min->target_rot_en_w;
566 min_h = variant->pix_min->target_rot_en_h;
567 tmp_w = cr->c.height;
568 tmp_h = cr->c.width;
569 } else {
570 min_w = variant->pix_min->target_rot_dis_w;
571 min_h = variant->pix_min->target_rot_dis_h;
572 }
573 }
574 pr_debug("mod_x: %d, mod_y: %d, min_w: %d, min_h = %d",
575 mod_x, mod_y, min_w, min_h);
576 pr_debug("tmp_w : %d, tmp_h : %d", tmp_w, tmp_h);
577
578 v4l_bound_align_image(&tmp_w, min_w, max_w, mod_x,
579 &tmp_h, min_h, max_h, mod_y, 0);
580
581 if (!V4L2_TYPE_IS_OUTPUT(cr->type) &&
582 (ctx->gsc_ctrls.rotate->val == 90 ||
583 ctx->gsc_ctrls.rotate->val == 270))
584 gsc_check_crop_change(tmp_h, tmp_w,
585 &cr->c.width, &cr->c.height);
586 else
587 gsc_check_crop_change(tmp_w, tmp_h,
588 &cr->c.width, &cr->c.height);
589
590
591 /* adjust left/top if cropping rectangle is out of bounds */
592 /* Need to add code to algin left value with 2's multiple */
593 if (cr->c.left + tmp_w > max_w)
594 cr->c.left = max_w - tmp_w;
595 if (cr->c.top + tmp_h > max_h)
596 cr->c.top = max_h - tmp_h;
597
598 if ((is_yuv420(f->fmt->color) || is_yuv422(f->fmt->color)) &&
599 cr->c.left & 1)
600 cr->c.left -= 1;
601
602 pr_debug("Aligned l:%d, t:%d, w:%d, h:%d, f_w: %d, f_h: %d",
603 cr->c.left, cr->c.top, cr->c.width, cr->c.height, max_w, max_h);
604
605 return 0;
606 }
607
gsc_check_scaler_ratio(struct gsc_variant * var,int sw,int sh,int dw,int dh,int rot,int out_path)608 int gsc_check_scaler_ratio(struct gsc_variant *var, int sw, int sh, int dw,
609 int dh, int rot, int out_path)
610 {
611 int tmp_w, tmp_h, sc_down_max;
612
613 if (out_path == GSC_DMA)
614 sc_down_max = var->sc_down_max;
615 else
616 sc_down_max = var->local_sc_down;
617
618 if (rot == 90 || rot == 270) {
619 tmp_w = dh;
620 tmp_h = dw;
621 } else {
622 tmp_w = dw;
623 tmp_h = dh;
624 }
625
626 if ((sw / tmp_w) > sc_down_max ||
627 (sh / tmp_h) > sc_down_max ||
628 (tmp_w / sw) > var->sc_up_max ||
629 (tmp_h / sh) > var->sc_up_max)
630 return -EINVAL;
631
632 return 0;
633 }
634
gsc_set_scaler_info(struct gsc_ctx * ctx)635 int gsc_set_scaler_info(struct gsc_ctx *ctx)
636 {
637 struct gsc_scaler *sc = &ctx->scaler;
638 struct gsc_frame *s_frame = &ctx->s_frame;
639 struct gsc_frame *d_frame = &ctx->d_frame;
640 struct gsc_variant *variant = ctx->gsc_dev->variant;
641 struct device *dev = &ctx->gsc_dev->pdev->dev;
642 int tx, ty;
643 int ret;
644
645 ret = gsc_check_scaler_ratio(variant, s_frame->crop.width,
646 s_frame->crop.height, d_frame->crop.width, d_frame->crop.height,
647 ctx->gsc_ctrls.rotate->val, ctx->out_path);
648 if (ret) {
649 pr_err("out of scaler range");
650 return ret;
651 }
652
653 if (ctx->gsc_ctrls.rotate->val == 90 ||
654 ctx->gsc_ctrls.rotate->val == 270) {
655 ty = d_frame->crop.width;
656 tx = d_frame->crop.height;
657 } else {
658 tx = d_frame->crop.width;
659 ty = d_frame->crop.height;
660 }
661
662 if (tx <= 0 || ty <= 0) {
663 dev_err(dev, "Invalid target size: %dx%d", tx, ty);
664 return -EINVAL;
665 }
666
667 ret = gsc_cal_prescaler_ratio(variant, s_frame->crop.width,
668 tx, &sc->pre_hratio);
669 if (ret) {
670 pr_err("Horizontal scale ratio is out of range");
671 return ret;
672 }
673
674 ret = gsc_cal_prescaler_ratio(variant, s_frame->crop.height,
675 ty, &sc->pre_vratio);
676 if (ret) {
677 pr_err("Vertical scale ratio is out of range");
678 return ret;
679 }
680
681 gsc_check_src_scale_info(variant, s_frame, &sc->pre_hratio,
682 tx, ty, &sc->pre_vratio);
683
684 gsc_get_prescaler_shfactor(sc->pre_hratio, sc->pre_vratio,
685 &sc->pre_shfactor);
686
687 sc->main_hratio = (s_frame->crop.width << 16) / tx;
688 sc->main_vratio = (s_frame->crop.height << 16) / ty;
689
690 pr_debug("scaler input/output size : sx = %d, sy = %d, tx = %d, ty = %d",
691 s_frame->crop.width, s_frame->crop.height, tx, ty);
692 pr_debug("scaler ratio info : pre_shfactor : %d, pre_h : %d",
693 sc->pre_shfactor, sc->pre_hratio);
694 pr_debug("pre_v :%d, main_h : %d, main_v : %d",
695 sc->pre_vratio, sc->main_hratio, sc->main_vratio);
696
697 return 0;
698 }
699
__gsc_s_ctrl(struct gsc_ctx * ctx,struct v4l2_ctrl * ctrl)700 static int __gsc_s_ctrl(struct gsc_ctx *ctx, struct v4l2_ctrl *ctrl)
701 {
702 struct gsc_dev *gsc = ctx->gsc_dev;
703 struct gsc_variant *variant = gsc->variant;
704 unsigned int flags = GSC_DST_FMT | GSC_SRC_FMT;
705 int ret = 0;
706
707 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
708 return 0;
709
710 switch (ctrl->id) {
711 case V4L2_CID_HFLIP:
712 ctx->hflip = ctrl->val;
713 break;
714
715 case V4L2_CID_VFLIP:
716 ctx->vflip = ctrl->val;
717 break;
718
719 case V4L2_CID_ROTATE:
720 if ((ctx->state & flags) == flags) {
721 ret = gsc_check_scaler_ratio(variant,
722 ctx->s_frame.crop.width,
723 ctx->s_frame.crop.height,
724 ctx->d_frame.crop.width,
725 ctx->d_frame.crop.height,
726 ctx->gsc_ctrls.rotate->val,
727 ctx->out_path);
728
729 if (ret)
730 return -EINVAL;
731 }
732
733 ctx->rotation = ctrl->val;
734 break;
735
736 case V4L2_CID_ALPHA_COMPONENT:
737 ctx->d_frame.alpha = ctrl->val;
738 break;
739 }
740
741 ctx->state |= GSC_PARAMS;
742 return 0;
743 }
744
gsc_s_ctrl(struct v4l2_ctrl * ctrl)745 static int gsc_s_ctrl(struct v4l2_ctrl *ctrl)
746 {
747 struct gsc_ctx *ctx = ctrl_to_ctx(ctrl);
748 unsigned long flags;
749 int ret;
750
751 spin_lock_irqsave(&ctx->gsc_dev->slock, flags);
752 ret = __gsc_s_ctrl(ctx, ctrl);
753 spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
754
755 return ret;
756 }
757
758 static const struct v4l2_ctrl_ops gsc_ctrl_ops = {
759 .s_ctrl = gsc_s_ctrl,
760 };
761
gsc_ctrls_create(struct gsc_ctx * ctx)762 int gsc_ctrls_create(struct gsc_ctx *ctx)
763 {
764 if (ctx->ctrls_rdy) {
765 pr_err("Control handler of this context was created already");
766 return 0;
767 }
768
769 v4l2_ctrl_handler_init(&ctx->ctrl_handler, GSC_MAX_CTRL_NUM);
770
771 ctx->gsc_ctrls.rotate = v4l2_ctrl_new_std(&ctx->ctrl_handler,
772 &gsc_ctrl_ops, V4L2_CID_ROTATE, 0, 270, 90, 0);
773 ctx->gsc_ctrls.hflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
774 &gsc_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
775 ctx->gsc_ctrls.vflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
776 &gsc_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
777 ctx->gsc_ctrls.global_alpha = v4l2_ctrl_new_std(&ctx->ctrl_handler,
778 &gsc_ctrl_ops, V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 0);
779
780 ctx->ctrls_rdy = ctx->ctrl_handler.error == 0;
781
782 if (ctx->ctrl_handler.error) {
783 int err = ctx->ctrl_handler.error;
784 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
785 pr_err("Failed to create G-Scaler control handlers");
786 return err;
787 }
788
789 return 0;
790 }
791
gsc_ctrls_delete(struct gsc_ctx * ctx)792 void gsc_ctrls_delete(struct gsc_ctx *ctx)
793 {
794 if (ctx->ctrls_rdy) {
795 v4l2_ctrl_handler_free(&ctx->ctrl_handler);
796 ctx->ctrls_rdy = false;
797 }
798 }
799
800 /* 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)801 int gsc_prepare_addr(struct gsc_ctx *ctx, struct vb2_buffer *vb,
802 struct gsc_frame *frame, struct gsc_addr *addr)
803 {
804 int ret = 0;
805 u32 pix_size;
806
807 if ((vb == NULL) || (frame == NULL))
808 return -EINVAL;
809
810 pix_size = frame->f_width * frame->f_height;
811
812 pr_debug("num_planes= %d, num_comp= %d, pix_size= %d",
813 frame->fmt->num_planes, frame->fmt->num_comp, pix_size);
814
815 addr->y = vb2_dma_contig_plane_dma_addr(vb, 0);
816
817 if (frame->fmt->num_planes == 1) {
818 switch (frame->fmt->num_comp) {
819 case 1:
820 addr->cb = 0;
821 addr->cr = 0;
822 break;
823 case 2:
824 /* decompose Y into Y/Cb */
825 addr->cb = (dma_addr_t)(addr->y + pix_size);
826 addr->cr = 0;
827 break;
828 case 3:
829 /* decompose Y into Y/Cb/Cr */
830 addr->cb = (dma_addr_t)(addr->y + pix_size);
831 if (GSC_YUV420 == frame->fmt->color)
832 addr->cr = (dma_addr_t)(addr->cb
833 + (pix_size >> 2));
834 else /* 422 */
835 addr->cr = (dma_addr_t)(addr->cb
836 + (pix_size >> 1));
837 break;
838 default:
839 pr_err("Invalid the number of color planes");
840 return -EINVAL;
841 }
842 } else {
843 if (frame->fmt->num_planes >= 2)
844 addr->cb = vb2_dma_contig_plane_dma_addr(vb, 1);
845
846 if (frame->fmt->num_planes == 3)
847 addr->cr = vb2_dma_contig_plane_dma_addr(vb, 2);
848 }
849
850 if ((frame->fmt->pixelformat == V4L2_PIX_FMT_VYUY) ||
851 (frame->fmt->pixelformat == V4L2_PIX_FMT_YVYU) ||
852 (frame->fmt->pixelformat == V4L2_PIX_FMT_NV61) ||
853 (frame->fmt->pixelformat == V4L2_PIX_FMT_YVU420) ||
854 (frame->fmt->pixelformat == V4L2_PIX_FMT_NV21) ||
855 (frame->fmt->pixelformat == V4L2_PIX_FMT_YVU420M))
856 swap(addr->cb, addr->cr);
857
858 pr_debug("ADDR: y= %pad cb= %pad cr= %pad ret= %d",
859 &addr->y, &addr->cb, &addr->cr, ret);
860
861 return ret;
862 }
863
gsc_irq_handler(int irq,void * priv)864 static irqreturn_t gsc_irq_handler(int irq, void *priv)
865 {
866 struct gsc_dev *gsc = priv;
867 struct gsc_ctx *ctx;
868 int gsc_irq;
869
870 gsc_irq = gsc_hw_get_irq_status(gsc);
871 gsc_hw_clear_irq(gsc, gsc_irq);
872
873 if (gsc_irq == GSC_IRQ_OVERRUN) {
874 pr_err("Local path input over-run interrupt has occurred!\n");
875 return IRQ_HANDLED;
876 }
877
878 spin_lock(&gsc->slock);
879
880 if (test_and_clear_bit(ST_M2M_PEND, &gsc->state)) {
881
882 gsc_hw_enable_control(gsc, false);
883
884 if (test_and_clear_bit(ST_M2M_SUSPENDING, &gsc->state)) {
885 set_bit(ST_M2M_SUSPENDED, &gsc->state);
886 wake_up(&gsc->irq_queue);
887 goto isr_unlock;
888 }
889 ctx = v4l2_m2m_get_curr_priv(gsc->m2m.m2m_dev);
890
891 if (!ctx || !ctx->m2m_ctx)
892 goto isr_unlock;
893
894 spin_unlock(&gsc->slock);
895 gsc_m2m_job_finish(ctx, VB2_BUF_STATE_DONE);
896
897 /* wake_up job_abort, stop_streaming */
898 if (ctx->state & GSC_CTX_STOP_REQ) {
899 ctx->state &= ~GSC_CTX_STOP_REQ;
900 wake_up(&gsc->irq_queue);
901 }
902 return IRQ_HANDLED;
903 }
904
905 isr_unlock:
906 spin_unlock(&gsc->slock);
907 return IRQ_HANDLED;
908 }
909
910 static struct gsc_pix_max gsc_v_100_max = {
911 .org_scaler_bypass_w = 8192,
912 .org_scaler_bypass_h = 8192,
913 .org_scaler_input_w = 4800,
914 .org_scaler_input_h = 3344,
915 .real_rot_dis_w = 4800,
916 .real_rot_dis_h = 3344,
917 .real_rot_en_w = 2047,
918 .real_rot_en_h = 2047,
919 .target_rot_dis_w = 4800,
920 .target_rot_dis_h = 3344,
921 .target_rot_en_w = 2016,
922 .target_rot_en_h = 2016,
923 };
924
925 static struct gsc_pix_min gsc_v_100_min = {
926 .org_w = 64,
927 .org_h = 32,
928 .real_w = 64,
929 .real_h = 32,
930 .target_rot_dis_w = 64,
931 .target_rot_dis_h = 32,
932 .target_rot_en_w = 32,
933 .target_rot_en_h = 16,
934 };
935
936 static struct gsc_pix_align gsc_v_100_align = {
937 .org_h = 16,
938 .org_w = 16, /* yuv420 : 16, others : 8 */
939 .offset_h = 2, /* yuv420/422 : 2, others : 1 */
940 .real_w = 16, /* yuv420/422 : 4~16, others : 2~8 */
941 .real_h = 16, /* yuv420 : 4~16, others : 1 */
942 .target_w = 2, /* yuv420/422 : 2, others : 1 */
943 .target_h = 2, /* yuv420 : 2, others : 1 */
944 };
945
946 static struct gsc_variant gsc_v_100_variant = {
947 .pix_max = &gsc_v_100_max,
948 .pix_min = &gsc_v_100_min,
949 .pix_align = &gsc_v_100_align,
950 .in_buf_cnt = 32,
951 .out_buf_cnt = 32,
952 .sc_up_max = 8,
953 .sc_down_max = 16,
954 .poly_sc_down_max = 4,
955 .pre_sc_down_max = 4,
956 .local_sc_down = 2,
957 };
958
959 static struct gsc_driverdata gsc_v_100_drvdata = {
960 .variant = {
961 [0] = &gsc_v_100_variant,
962 [1] = &gsc_v_100_variant,
963 [2] = &gsc_v_100_variant,
964 [3] = &gsc_v_100_variant,
965 },
966 .num_entities = 4,
967 .lclk_frequency = 266000000UL,
968 };
969
970 static const struct platform_device_id gsc_driver_ids[] = {
971 {
972 .name = "exynos-gsc",
973 .driver_data = (unsigned long)&gsc_v_100_drvdata,
974 },
975 {},
976 };
977 MODULE_DEVICE_TABLE(platform, gsc_driver_ids);
978
979 static const struct of_device_id exynos_gsc_match[] = {
980 {
981 .compatible = "samsung,exynos5-gsc",
982 .data = &gsc_v_100_drvdata,
983 },
984 {},
985 };
986 MODULE_DEVICE_TABLE(of, exynos_gsc_match);
987
gsc_get_drv_data(struct platform_device * pdev)988 static void *gsc_get_drv_data(struct platform_device *pdev)
989 {
990 struct gsc_driverdata *driver_data = NULL;
991
992 if (pdev->dev.of_node) {
993 const struct of_device_id *match;
994 match = of_match_node(exynos_gsc_match,
995 pdev->dev.of_node);
996 if (match)
997 driver_data = (struct gsc_driverdata *)match->data;
998 } else {
999 driver_data = (struct gsc_driverdata *)
1000 platform_get_device_id(pdev)->driver_data;
1001 }
1002
1003 return driver_data;
1004 }
1005
gsc_clk_put(struct gsc_dev * gsc)1006 static void gsc_clk_put(struct gsc_dev *gsc)
1007 {
1008 if (!IS_ERR(gsc->clock))
1009 clk_unprepare(gsc->clock);
1010 }
1011
gsc_clk_get(struct gsc_dev * gsc)1012 static int gsc_clk_get(struct gsc_dev *gsc)
1013 {
1014 int ret;
1015
1016 dev_dbg(&gsc->pdev->dev, "gsc_clk_get Called\n");
1017
1018 gsc->clock = devm_clk_get(&gsc->pdev->dev, GSC_CLOCK_GATE_NAME);
1019 if (IS_ERR(gsc->clock)) {
1020 dev_err(&gsc->pdev->dev, "failed to get clock~~~: %s\n",
1021 GSC_CLOCK_GATE_NAME);
1022 return PTR_ERR(gsc->clock);
1023 }
1024
1025 ret = clk_prepare(gsc->clock);
1026 if (ret < 0) {
1027 dev_err(&gsc->pdev->dev, "clock prepare failed for clock: %s\n",
1028 GSC_CLOCK_GATE_NAME);
1029 gsc->clock = ERR_PTR(-EINVAL);
1030 return ret;
1031 }
1032
1033 return 0;
1034 }
1035
gsc_m2m_suspend(struct gsc_dev * gsc)1036 static int gsc_m2m_suspend(struct gsc_dev *gsc)
1037 {
1038 unsigned long flags;
1039 int timeout;
1040
1041 spin_lock_irqsave(&gsc->slock, flags);
1042 if (!gsc_m2m_pending(gsc)) {
1043 spin_unlock_irqrestore(&gsc->slock, flags);
1044 return 0;
1045 }
1046 clear_bit(ST_M2M_SUSPENDED, &gsc->state);
1047 set_bit(ST_M2M_SUSPENDING, &gsc->state);
1048 spin_unlock_irqrestore(&gsc->slock, flags);
1049
1050 timeout = wait_event_timeout(gsc->irq_queue,
1051 test_bit(ST_M2M_SUSPENDED, &gsc->state),
1052 GSC_SHUTDOWN_TIMEOUT);
1053
1054 clear_bit(ST_M2M_SUSPENDING, &gsc->state);
1055 return timeout == 0 ? -EAGAIN : 0;
1056 }
1057
gsc_m2m_resume(struct gsc_dev * gsc)1058 static int gsc_m2m_resume(struct gsc_dev *gsc)
1059 {
1060 struct gsc_ctx *ctx;
1061 unsigned long flags;
1062
1063 spin_lock_irqsave(&gsc->slock, flags);
1064 /* Clear for full H/W setup in first run after resume */
1065 ctx = gsc->m2m.ctx;
1066 gsc->m2m.ctx = NULL;
1067 spin_unlock_irqrestore(&gsc->slock, flags);
1068
1069 if (test_and_clear_bit(ST_M2M_SUSPENDED, &gsc->state))
1070 gsc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
1071
1072 return 0;
1073 }
1074
gsc_probe(struct platform_device * pdev)1075 static int gsc_probe(struct platform_device *pdev)
1076 {
1077 struct gsc_dev *gsc;
1078 struct resource *res;
1079 struct gsc_driverdata *drv_data = gsc_get_drv_data(pdev);
1080 struct device *dev = &pdev->dev;
1081 int ret = 0;
1082
1083 gsc = devm_kzalloc(dev, sizeof(struct gsc_dev), GFP_KERNEL);
1084 if (!gsc)
1085 return -ENOMEM;
1086
1087 if (dev->of_node)
1088 gsc->id = of_alias_get_id(pdev->dev.of_node, "gsc");
1089 else
1090 gsc->id = pdev->id;
1091
1092 if (gsc->id >= drv_data->num_entities) {
1093 dev_err(dev, "Invalid platform device id: %d\n", gsc->id);
1094 return -EINVAL;
1095 }
1096
1097 gsc->variant = drv_data->variant[gsc->id];
1098 gsc->pdev = pdev;
1099 gsc->pdata = dev->platform_data;
1100
1101 init_waitqueue_head(&gsc->irq_queue);
1102 spin_lock_init(&gsc->slock);
1103 mutex_init(&gsc->lock);
1104 gsc->clock = ERR_PTR(-EINVAL);
1105
1106 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1107 gsc->regs = devm_ioremap_resource(dev, res);
1108 if (IS_ERR(gsc->regs))
1109 return PTR_ERR(gsc->regs);
1110
1111 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1112 if (!res) {
1113 dev_err(dev, "failed to get IRQ resource\n");
1114 return -ENXIO;
1115 }
1116
1117 ret = gsc_clk_get(gsc);
1118 if (ret)
1119 return ret;
1120
1121 ret = devm_request_irq(dev, res->start, gsc_irq_handler,
1122 0, pdev->name, gsc);
1123 if (ret) {
1124 dev_err(dev, "failed to install irq (%d)\n", ret);
1125 goto err_clk;
1126 }
1127
1128 ret = v4l2_device_register(dev, &gsc->v4l2_dev);
1129 if (ret)
1130 goto err_clk;
1131
1132 ret = gsc_register_m2m_device(gsc);
1133 if (ret)
1134 goto err_v4l2;
1135
1136 platform_set_drvdata(pdev, gsc);
1137 pm_runtime_enable(dev);
1138 ret = pm_runtime_get_sync(&pdev->dev);
1139 if (ret < 0)
1140 goto err_m2m;
1141
1142 /* Initialize continious memory allocator */
1143 gsc->alloc_ctx = vb2_dma_contig_init_ctx(dev);
1144 if (IS_ERR(gsc->alloc_ctx)) {
1145 ret = PTR_ERR(gsc->alloc_ctx);
1146 goto err_pm;
1147 }
1148
1149 dev_dbg(dev, "gsc-%d registered successfully\n", gsc->id);
1150
1151 pm_runtime_put(dev);
1152 return 0;
1153 err_pm:
1154 pm_runtime_put(dev);
1155 err_m2m:
1156 gsc_unregister_m2m_device(gsc);
1157 err_v4l2:
1158 v4l2_device_unregister(&gsc->v4l2_dev);
1159 err_clk:
1160 gsc_clk_put(gsc);
1161 return ret;
1162 }
1163
gsc_remove(struct platform_device * pdev)1164 static int gsc_remove(struct platform_device *pdev)
1165 {
1166 struct gsc_dev *gsc = platform_get_drvdata(pdev);
1167
1168 gsc_unregister_m2m_device(gsc);
1169 v4l2_device_unregister(&gsc->v4l2_dev);
1170
1171 vb2_dma_contig_cleanup_ctx(gsc->alloc_ctx);
1172 pm_runtime_disable(&pdev->dev);
1173 gsc_clk_put(gsc);
1174
1175 dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
1176 return 0;
1177 }
1178
gsc_runtime_resume(struct device * dev)1179 static int gsc_runtime_resume(struct device *dev)
1180 {
1181 struct gsc_dev *gsc = dev_get_drvdata(dev);
1182 int ret = 0;
1183
1184 pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1185
1186 ret = clk_enable(gsc->clock);
1187 if (ret)
1188 return ret;
1189
1190 gsc_hw_set_sw_reset(gsc);
1191 gsc_wait_reset(gsc);
1192
1193 return gsc_m2m_resume(gsc);
1194 }
1195
gsc_runtime_suspend(struct device * dev)1196 static int gsc_runtime_suspend(struct device *dev)
1197 {
1198 struct gsc_dev *gsc = dev_get_drvdata(dev);
1199 int ret = 0;
1200
1201 ret = gsc_m2m_suspend(gsc);
1202 if (!ret)
1203 clk_disable(gsc->clock);
1204
1205 pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1206 return ret;
1207 }
1208
gsc_resume(struct device * dev)1209 static int gsc_resume(struct device *dev)
1210 {
1211 struct gsc_dev *gsc = dev_get_drvdata(dev);
1212 unsigned long flags;
1213
1214 pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1215
1216 /* Do not resume if the device was idle before system suspend */
1217 spin_lock_irqsave(&gsc->slock, flags);
1218 if (!test_and_clear_bit(ST_SUSPEND, &gsc->state) ||
1219 !gsc_m2m_opened(gsc)) {
1220 spin_unlock_irqrestore(&gsc->slock, flags);
1221 return 0;
1222 }
1223 spin_unlock_irqrestore(&gsc->slock, flags);
1224
1225 if (!pm_runtime_suspended(dev))
1226 return gsc_runtime_resume(dev);
1227
1228 return 0;
1229 }
1230
gsc_suspend(struct device * dev)1231 static int gsc_suspend(struct device *dev)
1232 {
1233 struct gsc_dev *gsc = dev_get_drvdata(dev);
1234
1235 pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
1236
1237 if (test_and_set_bit(ST_SUSPEND, &gsc->state))
1238 return 0;
1239
1240 if (!pm_runtime_suspended(dev))
1241 return gsc_runtime_suspend(dev);
1242
1243 return 0;
1244 }
1245
1246 static const struct dev_pm_ops gsc_pm_ops = {
1247 .suspend = gsc_suspend,
1248 .resume = gsc_resume,
1249 .runtime_suspend = gsc_runtime_suspend,
1250 .runtime_resume = gsc_runtime_resume,
1251 };
1252
1253 static struct platform_driver gsc_driver = {
1254 .probe = gsc_probe,
1255 .remove = gsc_remove,
1256 .id_table = gsc_driver_ids,
1257 .driver = {
1258 .name = GSC_MODULE_NAME,
1259 .pm = &gsc_pm_ops,
1260 .of_match_table = exynos_gsc_match,
1261 }
1262 };
1263
1264 module_platform_driver(gsc_driver);
1265
1266 MODULE_AUTHOR("Hyunwong Kim <khw0178.kim@samsung.com>");
1267 MODULE_DESCRIPTION("Samsung EXYNOS5 Soc series G-Scaler driver");
1268 MODULE_LICENSE("GPL");
1269