1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright 2019 NXP.
4 */
5
6 #include <linux/device.h>
7 #include <linux/slab.h>
8
9 #include "dcss-dev.h"
10
11 #define DCSS_DPR_SYSTEM_CTRL0 0x000
12 #define RUN_EN BIT(0)
13 #define SOFT_RESET BIT(1)
14 #define REPEAT_EN BIT(2)
15 #define SHADOW_LOAD_EN BIT(3)
16 #define SW_SHADOW_LOAD_SEL BIT(4)
17 #define BCMD2AXI_MSTR_ID_CTRL BIT(16)
18 #define DCSS_DPR_IRQ_MASK 0x020
19 #define DCSS_DPR_IRQ_MASK_STATUS 0x030
20 #define DCSS_DPR_IRQ_NONMASK_STATUS 0x040
21 #define IRQ_DPR_CTRL_DONE BIT(0)
22 #define IRQ_DPR_RUN BIT(1)
23 #define IRQ_DPR_SHADOW_LOADED BIT(2)
24 #define IRQ_AXI_READ_ERR BIT(3)
25 #define DPR2RTR_YRGB_FIFO_OVFL BIT(4)
26 #define DPR2RTR_UV_FIFO_OVFL BIT(5)
27 #define DPR2RTR_FIFO_LD_BUF_RDY_YRGB_ERR BIT(6)
28 #define DPR2RTR_FIFO_LD_BUF_RDY_UV_ERR BIT(7)
29 #define DCSS_DPR_MODE_CTRL0 0x050
30 #define RTR_3BUF_EN BIT(0)
31 #define RTR_4LINE_BUF_EN BIT(1)
32 #define TILE_TYPE_POS 2
33 #define TILE_TYPE_MASK GENMASK(4, 2)
34 #define YUV_EN BIT(6)
35 #define COMP_2PLANE_EN BIT(7)
36 #define PIX_SIZE_POS 8
37 #define PIX_SIZE_MASK GENMASK(9, 8)
38 #define PIX_LUMA_UV_SWAP BIT(10)
39 #define PIX_UV_SWAP BIT(11)
40 #define B_COMP_SEL_POS 12
41 #define B_COMP_SEL_MASK GENMASK(13, 12)
42 #define G_COMP_SEL_POS 14
43 #define G_COMP_SEL_MASK GENMASK(15, 14)
44 #define R_COMP_SEL_POS 16
45 #define R_COMP_SEL_MASK GENMASK(17, 16)
46 #define A_COMP_SEL_POS 18
47 #define A_COMP_SEL_MASK GENMASK(19, 18)
48 #define DCSS_DPR_FRAME_CTRL0 0x070
49 #define HFLIP_EN BIT(0)
50 #define VFLIP_EN BIT(1)
51 #define ROT_ENC_POS 2
52 #define ROT_ENC_MASK GENMASK(3, 2)
53 #define ROT_FLIP_ORDER_EN BIT(4)
54 #define PITCH_POS 16
55 #define PITCH_MASK GENMASK(31, 16)
56 #define DCSS_DPR_FRAME_1P_CTRL0 0x090
57 #define DCSS_DPR_FRAME_1P_PIX_X_CTRL 0x0A0
58 #define DCSS_DPR_FRAME_1P_PIX_Y_CTRL 0x0B0
59 #define DCSS_DPR_FRAME_1P_BASE_ADDR 0x0C0
60 #define DCSS_DPR_FRAME_2P_CTRL0 0x0E0
61 #define DCSS_DPR_FRAME_2P_PIX_X_CTRL 0x0F0
62 #define DCSS_DPR_FRAME_2P_PIX_Y_CTRL 0x100
63 #define DCSS_DPR_FRAME_2P_BASE_ADDR 0x110
64 #define DCSS_DPR_STATUS_CTRL0 0x130
65 #define STATUS_MUX_SEL_MASK GENMASK(2, 0)
66 #define STATUS_SRC_SEL_POS 16
67 #define STATUS_SRC_SEL_MASK GENMASK(18, 16)
68 #define DCSS_DPR_STATUS_CTRL1 0x140
69 #define DCSS_DPR_RTRAM_CTRL0 0x200
70 #define NUM_ROWS_ACTIVE BIT(0)
71 #define THRES_HIGH_POS 1
72 #define THRES_HIGH_MASK GENMASK(3, 1)
73 #define THRES_LOW_POS 4
74 #define THRES_LOW_MASK GENMASK(6, 4)
75 #define ABORT_SEL BIT(7)
76
77 enum dcss_tile_type {
78 TILE_LINEAR = 0,
79 TILE_GPU_STANDARD,
80 TILE_GPU_SUPER,
81 TILE_VPU_YUV420,
82 TILE_VPU_VP9,
83 };
84
85 enum dcss_pix_size {
86 PIX_SIZE_8,
87 PIX_SIZE_16,
88 PIX_SIZE_32,
89 };
90
91 struct dcss_dpr_ch {
92 struct dcss_dpr *dpr;
93 void __iomem *base_reg;
94 u32 base_ofs;
95
96 struct drm_format_info format;
97 enum dcss_pix_size pix_size;
98 enum dcss_tile_type tile;
99 bool rtram_4line_en;
100 bool rtram_3buf_en;
101
102 u32 frame_ctrl;
103 u32 mode_ctrl;
104 u32 sys_ctrl;
105 u32 rtram_ctrl;
106
107 bool sys_ctrl_chgd;
108
109 int ch_num;
110 int irq;
111 };
112
113 struct dcss_dpr {
114 struct device *dev;
115 struct dcss_ctxld *ctxld;
116 u32 ctx_id;
117
118 struct dcss_dpr_ch ch[3];
119 };
120
dcss_dpr_write(struct dcss_dpr_ch * ch,u32 val,u32 ofs)121 static void dcss_dpr_write(struct dcss_dpr_ch *ch, u32 val, u32 ofs)
122 {
123 struct dcss_dpr *dpr = ch->dpr;
124
125 dcss_ctxld_write(dpr->ctxld, dpr->ctx_id, val, ch->base_ofs + ofs);
126 }
127
dcss_dpr_ch_init_all(struct dcss_dpr * dpr,unsigned long dpr_base)128 static int dcss_dpr_ch_init_all(struct dcss_dpr *dpr, unsigned long dpr_base)
129 {
130 struct dcss_dpr_ch *ch;
131 int i;
132
133 for (i = 0; i < 3; i++) {
134 ch = &dpr->ch[i];
135
136 ch->base_ofs = dpr_base + i * 0x1000;
137
138 ch->base_reg = ioremap(ch->base_ofs, SZ_4K);
139 if (!ch->base_reg) {
140 dev_err(dpr->dev, "dpr: unable to remap ch %d base\n",
141 i);
142 return -ENOMEM;
143 }
144
145 ch->dpr = dpr;
146 ch->ch_num = i;
147
148 dcss_writel(0xff, ch->base_reg + DCSS_DPR_IRQ_MASK);
149 }
150
151 return 0;
152 }
153
dcss_dpr_init(struct dcss_dev * dcss,unsigned long dpr_base)154 int dcss_dpr_init(struct dcss_dev *dcss, unsigned long dpr_base)
155 {
156 struct dcss_dpr *dpr;
157
158 dpr = kzalloc(sizeof(*dpr), GFP_KERNEL);
159 if (!dpr)
160 return -ENOMEM;
161
162 dcss->dpr = dpr;
163 dpr->dev = dcss->dev;
164 dpr->ctxld = dcss->ctxld;
165 dpr->ctx_id = CTX_SB_HP;
166
167 if (dcss_dpr_ch_init_all(dpr, dpr_base)) {
168 int i;
169
170 for (i = 0; i < 3; i++) {
171 if (dpr->ch[i].base_reg)
172 iounmap(dpr->ch[i].base_reg);
173 }
174
175 kfree(dpr);
176
177 return -ENOMEM;
178 }
179
180 return 0;
181 }
182
dcss_dpr_exit(struct dcss_dpr * dpr)183 void dcss_dpr_exit(struct dcss_dpr *dpr)
184 {
185 int ch_no;
186
187 /* stop DPR on all channels */
188 for (ch_no = 0; ch_no < 3; ch_no++) {
189 struct dcss_dpr_ch *ch = &dpr->ch[ch_no];
190
191 dcss_writel(0, ch->base_reg + DCSS_DPR_SYSTEM_CTRL0);
192
193 if (ch->base_reg)
194 iounmap(ch->base_reg);
195 }
196
197 kfree(dpr);
198 }
199
dcss_dpr_x_pix_wide_adjust(struct dcss_dpr_ch * ch,u32 pix_wide,u32 pix_format)200 static u32 dcss_dpr_x_pix_wide_adjust(struct dcss_dpr_ch *ch, u32 pix_wide,
201 u32 pix_format)
202 {
203 u8 pix_in_64byte_map[3][5] = {
204 /* LIN, GPU_STD, GPU_SUP, VPU_YUV420, VPU_VP9 */
205 { 64, 8, 8, 8, 16}, /* PIX_SIZE_8 */
206 { 32, 8, 8, 8, 8}, /* PIX_SIZE_16 */
207 { 16, 4, 4, 8, 8}, /* PIX_SIZE_32 */
208 };
209 u32 offset;
210 u32 div_64byte_mod, pix_in_64byte;
211
212 pix_in_64byte = pix_in_64byte_map[ch->pix_size][ch->tile];
213
214 div_64byte_mod = pix_wide % pix_in_64byte;
215 offset = (div_64byte_mod == 0) ? 0 : (pix_in_64byte - div_64byte_mod);
216
217 return pix_wide + offset;
218 }
219
dcss_dpr_y_pix_high_adjust(struct dcss_dpr_ch * ch,u32 pix_high,u32 pix_format)220 static u32 dcss_dpr_y_pix_high_adjust(struct dcss_dpr_ch *ch, u32 pix_high,
221 u32 pix_format)
222 {
223 u8 num_rows_buf = ch->rtram_4line_en ? 4 : 8;
224 u32 offset, pix_y_mod;
225
226 pix_y_mod = pix_high % num_rows_buf;
227 offset = pix_y_mod ? (num_rows_buf - pix_y_mod) : 0;
228
229 return pix_high + offset;
230 }
231
dcss_dpr_set_res(struct dcss_dpr * dpr,int ch_num,u32 xres,u32 yres)232 void dcss_dpr_set_res(struct dcss_dpr *dpr, int ch_num, u32 xres, u32 yres)
233 {
234 struct dcss_dpr_ch *ch = &dpr->ch[ch_num];
235 u32 pix_format = ch->format.format;
236 u32 gap = DCSS_DPR_FRAME_2P_BASE_ADDR - DCSS_DPR_FRAME_1P_BASE_ADDR;
237 int plane, max_planes = 1;
238 u32 pix_x_wide, pix_y_high;
239
240 if (pix_format == DRM_FORMAT_NV12 ||
241 pix_format == DRM_FORMAT_NV21)
242 max_planes = 2;
243
244 for (plane = 0; plane < max_planes; plane++) {
245 yres = plane == 1 ? yres >> 1 : yres;
246
247 pix_x_wide = dcss_dpr_x_pix_wide_adjust(ch, xres, pix_format);
248 pix_y_high = dcss_dpr_y_pix_high_adjust(ch, yres, pix_format);
249
250 dcss_dpr_write(ch, pix_x_wide,
251 DCSS_DPR_FRAME_1P_PIX_X_CTRL + plane * gap);
252 dcss_dpr_write(ch, pix_y_high,
253 DCSS_DPR_FRAME_1P_PIX_Y_CTRL + plane * gap);
254
255 dcss_dpr_write(ch, 2, DCSS_DPR_FRAME_1P_CTRL0 + plane * gap);
256 }
257 }
258
dcss_dpr_addr_set(struct dcss_dpr * dpr,int ch_num,u32 luma_base_addr,u32 chroma_base_addr,u16 pitch)259 void dcss_dpr_addr_set(struct dcss_dpr *dpr, int ch_num, u32 luma_base_addr,
260 u32 chroma_base_addr, u16 pitch)
261 {
262 struct dcss_dpr_ch *ch = &dpr->ch[ch_num];
263
264 dcss_dpr_write(ch, luma_base_addr, DCSS_DPR_FRAME_1P_BASE_ADDR);
265
266 dcss_dpr_write(ch, chroma_base_addr, DCSS_DPR_FRAME_2P_BASE_ADDR);
267
268 ch->frame_ctrl &= ~PITCH_MASK;
269 ch->frame_ctrl |= (((u32)pitch << PITCH_POS) & PITCH_MASK);
270 }
271
dcss_dpr_argb_comp_sel(struct dcss_dpr_ch * ch,int a_sel,int r_sel,int g_sel,int b_sel)272 static void dcss_dpr_argb_comp_sel(struct dcss_dpr_ch *ch, int a_sel, int r_sel,
273 int g_sel, int b_sel)
274 {
275 u32 sel;
276
277 sel = ((a_sel << A_COMP_SEL_POS) & A_COMP_SEL_MASK) |
278 ((r_sel << R_COMP_SEL_POS) & R_COMP_SEL_MASK) |
279 ((g_sel << G_COMP_SEL_POS) & G_COMP_SEL_MASK) |
280 ((b_sel << B_COMP_SEL_POS) & B_COMP_SEL_MASK);
281
282 ch->mode_ctrl &= ~(A_COMP_SEL_MASK | R_COMP_SEL_MASK |
283 G_COMP_SEL_MASK | B_COMP_SEL_MASK);
284 ch->mode_ctrl |= sel;
285 }
286
dcss_dpr_pix_size_set(struct dcss_dpr_ch * ch,const struct drm_format_info * format)287 static void dcss_dpr_pix_size_set(struct dcss_dpr_ch *ch,
288 const struct drm_format_info *format)
289 {
290 u32 val;
291
292 switch (format->format) {
293 case DRM_FORMAT_NV12:
294 case DRM_FORMAT_NV21:
295 val = PIX_SIZE_8;
296 break;
297
298 case DRM_FORMAT_UYVY:
299 case DRM_FORMAT_VYUY:
300 case DRM_FORMAT_YUYV:
301 case DRM_FORMAT_YVYU:
302 val = PIX_SIZE_16;
303 break;
304
305 default:
306 val = PIX_SIZE_32;
307 break;
308 }
309
310 ch->pix_size = val;
311
312 ch->mode_ctrl &= ~PIX_SIZE_MASK;
313 ch->mode_ctrl |= ((val << PIX_SIZE_POS) & PIX_SIZE_MASK);
314 }
315
dcss_dpr_uv_swap(struct dcss_dpr_ch * ch,bool swap)316 static void dcss_dpr_uv_swap(struct dcss_dpr_ch *ch, bool swap)
317 {
318 ch->mode_ctrl &= ~PIX_UV_SWAP;
319 ch->mode_ctrl |= (swap ? PIX_UV_SWAP : 0);
320 }
321
dcss_dpr_y_uv_swap(struct dcss_dpr_ch * ch,bool swap)322 static void dcss_dpr_y_uv_swap(struct dcss_dpr_ch *ch, bool swap)
323 {
324 ch->mode_ctrl &= ~PIX_LUMA_UV_SWAP;
325 ch->mode_ctrl |= (swap ? PIX_LUMA_UV_SWAP : 0);
326 }
327
dcss_dpr_2plane_en(struct dcss_dpr_ch * ch,bool en)328 static void dcss_dpr_2plane_en(struct dcss_dpr_ch *ch, bool en)
329 {
330 ch->mode_ctrl &= ~COMP_2PLANE_EN;
331 ch->mode_ctrl |= (en ? COMP_2PLANE_EN : 0);
332 }
333
dcss_dpr_yuv_en(struct dcss_dpr_ch * ch,bool en)334 static void dcss_dpr_yuv_en(struct dcss_dpr_ch *ch, bool en)
335 {
336 ch->mode_ctrl &= ~YUV_EN;
337 ch->mode_ctrl |= (en ? YUV_EN : 0);
338 }
339
dcss_dpr_enable(struct dcss_dpr * dpr,int ch_num,bool en)340 void dcss_dpr_enable(struct dcss_dpr *dpr, int ch_num, bool en)
341 {
342 struct dcss_dpr_ch *ch = &dpr->ch[ch_num];
343 u32 sys_ctrl;
344
345 sys_ctrl = (en ? REPEAT_EN | RUN_EN : 0);
346
347 if (en) {
348 dcss_dpr_write(ch, ch->mode_ctrl, DCSS_DPR_MODE_CTRL0);
349 dcss_dpr_write(ch, ch->frame_ctrl, DCSS_DPR_FRAME_CTRL0);
350 dcss_dpr_write(ch, ch->rtram_ctrl, DCSS_DPR_RTRAM_CTRL0);
351 }
352
353 if (ch->sys_ctrl != sys_ctrl)
354 ch->sys_ctrl_chgd = true;
355
356 ch->sys_ctrl = sys_ctrl;
357 }
358
359 struct rgb_comp_sel {
360 u32 drm_format;
361 int a_sel;
362 int r_sel;
363 int g_sel;
364 int b_sel;
365 };
366
367 static struct rgb_comp_sel comp_sel_map[] = {
368 {DRM_FORMAT_ARGB8888, 3, 2, 1, 0},
369 {DRM_FORMAT_XRGB8888, 3, 2, 1, 0},
370 {DRM_FORMAT_ABGR8888, 3, 0, 1, 2},
371 {DRM_FORMAT_XBGR8888, 3, 0, 1, 2},
372 {DRM_FORMAT_RGBA8888, 0, 3, 2, 1},
373 {DRM_FORMAT_RGBX8888, 0, 3, 2, 1},
374 {DRM_FORMAT_BGRA8888, 0, 1, 2, 3},
375 {DRM_FORMAT_BGRX8888, 0, 1, 2, 3},
376 };
377
to_comp_sel(u32 pix_fmt,int * a_sel,int * r_sel,int * g_sel,int * b_sel)378 static int to_comp_sel(u32 pix_fmt, int *a_sel, int *r_sel, int *g_sel,
379 int *b_sel)
380 {
381 int i;
382
383 for (i = 0; i < ARRAY_SIZE(comp_sel_map); i++) {
384 if (comp_sel_map[i].drm_format == pix_fmt) {
385 *a_sel = comp_sel_map[i].a_sel;
386 *r_sel = comp_sel_map[i].r_sel;
387 *g_sel = comp_sel_map[i].g_sel;
388 *b_sel = comp_sel_map[i].b_sel;
389
390 return 0;
391 }
392 }
393
394 return -1;
395 }
396
dcss_dpr_rtram_set(struct dcss_dpr_ch * ch,u32 pix_format)397 static void dcss_dpr_rtram_set(struct dcss_dpr_ch *ch, u32 pix_format)
398 {
399 u32 val, mask;
400
401 switch (pix_format) {
402 case DRM_FORMAT_NV21:
403 case DRM_FORMAT_NV12:
404 ch->rtram_3buf_en = true;
405 ch->rtram_4line_en = false;
406 break;
407
408 default:
409 ch->rtram_3buf_en = true;
410 ch->rtram_4line_en = true;
411 break;
412 }
413
414 val = (ch->rtram_4line_en ? RTR_4LINE_BUF_EN : 0);
415 val |= (ch->rtram_3buf_en ? RTR_3BUF_EN : 0);
416 mask = RTR_4LINE_BUF_EN | RTR_3BUF_EN;
417
418 ch->mode_ctrl &= ~mask;
419 ch->mode_ctrl |= (val & mask);
420
421 val = (ch->rtram_4line_en ? 0 : NUM_ROWS_ACTIVE);
422 val |= (3 << THRES_LOW_POS) & THRES_LOW_MASK;
423 val |= (4 << THRES_HIGH_POS) & THRES_HIGH_MASK;
424 mask = THRES_LOW_MASK | THRES_HIGH_MASK | NUM_ROWS_ACTIVE;
425
426 ch->rtram_ctrl &= ~mask;
427 ch->rtram_ctrl |= (val & mask);
428 }
429
dcss_dpr_setup_components(struct dcss_dpr_ch * ch,const struct drm_format_info * format)430 static void dcss_dpr_setup_components(struct dcss_dpr_ch *ch,
431 const struct drm_format_info *format)
432 {
433 int a_sel, r_sel, g_sel, b_sel;
434 bool uv_swap, y_uv_swap;
435
436 switch (format->format) {
437 case DRM_FORMAT_YVYU:
438 uv_swap = true;
439 y_uv_swap = true;
440 break;
441
442 case DRM_FORMAT_VYUY:
443 case DRM_FORMAT_NV21:
444 uv_swap = true;
445 y_uv_swap = false;
446 break;
447
448 case DRM_FORMAT_YUYV:
449 uv_swap = false;
450 y_uv_swap = true;
451 break;
452
453 default:
454 uv_swap = false;
455 y_uv_swap = false;
456 break;
457 }
458
459 dcss_dpr_uv_swap(ch, uv_swap);
460
461 dcss_dpr_y_uv_swap(ch, y_uv_swap);
462
463 if (!format->is_yuv) {
464 if (!to_comp_sel(format->format, &a_sel, &r_sel,
465 &g_sel, &b_sel)) {
466 dcss_dpr_argb_comp_sel(ch, a_sel, r_sel, g_sel, b_sel);
467 } else {
468 dcss_dpr_argb_comp_sel(ch, 3, 2, 1, 0);
469 }
470 } else {
471 dcss_dpr_argb_comp_sel(ch, 0, 0, 0, 0);
472 }
473 }
474
dcss_dpr_tile_set(struct dcss_dpr_ch * ch,uint64_t modifier)475 static void dcss_dpr_tile_set(struct dcss_dpr_ch *ch, uint64_t modifier)
476 {
477 switch (ch->ch_num) {
478 case 0:
479 switch (modifier) {
480 case DRM_FORMAT_MOD_LINEAR:
481 ch->tile = TILE_LINEAR;
482 break;
483 case DRM_FORMAT_MOD_VIVANTE_TILED:
484 ch->tile = TILE_GPU_STANDARD;
485 break;
486 case DRM_FORMAT_MOD_VIVANTE_SUPER_TILED:
487 ch->tile = TILE_GPU_SUPER;
488 break;
489 default:
490 WARN_ON(1);
491 break;
492 }
493 break;
494 case 1:
495 case 2:
496 ch->tile = TILE_LINEAR;
497 break;
498 default:
499 WARN_ON(1);
500 return;
501 }
502
503 ch->mode_ctrl &= ~TILE_TYPE_MASK;
504 ch->mode_ctrl |= ((ch->tile << TILE_TYPE_POS) & TILE_TYPE_MASK);
505 }
506
dcss_dpr_format_set(struct dcss_dpr * dpr,int ch_num,const struct drm_format_info * format,u64 modifier)507 void dcss_dpr_format_set(struct dcss_dpr *dpr, int ch_num,
508 const struct drm_format_info *format, u64 modifier)
509 {
510 struct dcss_dpr_ch *ch = &dpr->ch[ch_num];
511
512 ch->format = *format;
513
514 dcss_dpr_yuv_en(ch, format->is_yuv);
515
516 dcss_dpr_pix_size_set(ch, format);
517
518 dcss_dpr_setup_components(ch, format);
519
520 dcss_dpr_2plane_en(ch, format->num_planes == 2);
521
522 dcss_dpr_rtram_set(ch, format->format);
523
524 dcss_dpr_tile_set(ch, modifier);
525 }
526
527 /* This function will be called from interrupt context. */
dcss_dpr_write_sysctrl(struct dcss_dpr * dpr)528 void dcss_dpr_write_sysctrl(struct dcss_dpr *dpr)
529 {
530 int chnum;
531
532 dcss_ctxld_assert_locked(dpr->ctxld);
533
534 for (chnum = 0; chnum < 3; chnum++) {
535 struct dcss_dpr_ch *ch = &dpr->ch[chnum];
536
537 if (ch->sys_ctrl_chgd) {
538 dcss_ctxld_write_irqsafe(dpr->ctxld, dpr->ctx_id,
539 ch->sys_ctrl,
540 ch->base_ofs +
541 DCSS_DPR_SYSTEM_CTRL0);
542 ch->sys_ctrl_chgd = false;
543 }
544 }
545 }
546
dcss_dpr_set_rotation(struct dcss_dpr * dpr,int ch_num,u32 rotation)547 void dcss_dpr_set_rotation(struct dcss_dpr *dpr, int ch_num, u32 rotation)
548 {
549 struct dcss_dpr_ch *ch = &dpr->ch[ch_num];
550
551 ch->frame_ctrl &= ~(HFLIP_EN | VFLIP_EN | ROT_ENC_MASK);
552
553 ch->frame_ctrl |= rotation & DRM_MODE_REFLECT_X ? HFLIP_EN : 0;
554 ch->frame_ctrl |= rotation & DRM_MODE_REFLECT_Y ? VFLIP_EN : 0;
555
556 if (rotation & DRM_MODE_ROTATE_90)
557 ch->frame_ctrl |= 1 << ROT_ENC_POS;
558 else if (rotation & DRM_MODE_ROTATE_180)
559 ch->frame_ctrl |= 2 << ROT_ENC_POS;
560 else if (rotation & DRM_MODE_ROTATE_270)
561 ch->frame_ctrl |= 3 << ROT_ENC_POS;
562 }
563