1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2016-2018 Texas Instruments Incorporated - https://www.ti.com/
4  * Author: Jyri Sarha <jsarha@ti.com>
5  */
6 
7 #include <linux/clk.h>
8 #include <linux/delay.h>
9 #include <linux/dma-mapping.h>
10 #include <linux/err.h>
11 #include <linux/interrupt.h>
12 #include <linux/io.h>
13 #include <linux/kernel.h>
14 #include <linux/media-bus-format.h>
15 #include <linux/module.h>
16 #include <linux/mfd/syscon.h>
17 #include <linux/of.h>
18 #include <linux/of_graph.h>
19 #include <linux/of_device.h>
20 #include <linux/platform_device.h>
21 #include <linux/pm_runtime.h>
22 #include <linux/regmap.h>
23 #include <linux/sys_soc.h>
24 
25 #include <drm/drm_blend.h>
26 #include <drm/drm_fourcc.h>
27 #include <drm/drm_fb_dma_helper.h>
28 #include <drm/drm_framebuffer.h>
29 #include <drm/drm_gem_dma_helper.h>
30 #include <drm/drm_panel.h>
31 
32 #include "tidss_crtc.h"
33 #include "tidss_dispc.h"
34 #include "tidss_drv.h"
35 #include "tidss_irq.h"
36 #include "tidss_plane.h"
37 
38 #include "tidss_dispc_regs.h"
39 #include "tidss_scale_coefs.h"
40 
41 static const u16 tidss_k2g_common_regs[DISPC_COMMON_REG_TABLE_LEN] = {
42 	[DSS_REVISION_OFF] =                    0x00,
43 	[DSS_SYSCONFIG_OFF] =                   0x04,
44 	[DSS_SYSSTATUS_OFF] =                   0x08,
45 	[DISPC_IRQ_EOI_OFF] =                   0x20,
46 	[DISPC_IRQSTATUS_RAW_OFF] =             0x24,
47 	[DISPC_IRQSTATUS_OFF] =                 0x28,
48 	[DISPC_IRQENABLE_SET_OFF] =             0x2c,
49 	[DISPC_IRQENABLE_CLR_OFF] =             0x30,
50 
51 	[DISPC_GLOBAL_MFLAG_ATTRIBUTE_OFF] =    0x40,
52 	[DISPC_GLOBAL_BUFFER_OFF] =             0x44,
53 
54 	[DISPC_DBG_CONTROL_OFF] =               0x4c,
55 	[DISPC_DBG_STATUS_OFF] =                0x50,
56 
57 	[DISPC_CLKGATING_DISABLE_OFF] =         0x54,
58 };
59 
60 const struct dispc_features dispc_k2g_feats = {
61 	.min_pclk_khz = 4375,
62 
63 	.max_pclk_khz = {
64 		[DISPC_VP_DPI] = 150000,
65 	},
66 
67 	/*
68 	 * XXX According TRM the RGB input buffer width up to 2560 should
69 	 *     work on 3 taps, but in practice it only works up to 1280.
70 	 */
71 	.scaling = {
72 		.in_width_max_5tap_rgb = 1280,
73 		.in_width_max_3tap_rgb = 1280,
74 		.in_width_max_5tap_yuv = 2560,
75 		.in_width_max_3tap_yuv = 2560,
76 		.upscale_limit = 16,
77 		.downscale_limit_5tap = 4,
78 		.downscale_limit_3tap = 2,
79 		/*
80 		 * The max supported pixel inc value is 255. The value
81 		 * of pixel inc is calculated like this: 1+(xinc-1)*bpp.
82 		 * The maximum bpp of all formats supported by the HW
83 		 * is 8. So the maximum supported xinc value is 32,
84 		 * because 1+(32-1)*8 < 255 < 1+(33-1)*4.
85 		 */
86 		.xinc_max = 32,
87 	},
88 
89 	.subrev = DISPC_K2G,
90 
91 	.common = "common",
92 
93 	.common_regs = tidss_k2g_common_regs,
94 
95 	.num_vps = 1,
96 	.vp_name = { "vp1" },
97 	.ovr_name = { "ovr1" },
98 	.vpclk_name =  { "vp1" },
99 	.vp_bus_type = { DISPC_VP_DPI },
100 
101 	.vp_feat = { .color = {
102 			.has_ctm = true,
103 			.gamma_size = 256,
104 			.gamma_type = TIDSS_GAMMA_8BIT,
105 		},
106 	},
107 
108 	.num_planes = 1,
109 	.vid_name = { "vid1" },
110 	.vid_lite = { false },
111 	.vid_order = { 0 },
112 };
113 
114 static const u16 tidss_am65x_common_regs[DISPC_COMMON_REG_TABLE_LEN] = {
115 	[DSS_REVISION_OFF] =			0x4,
116 	[DSS_SYSCONFIG_OFF] =			0x8,
117 	[DSS_SYSSTATUS_OFF] =			0x20,
118 	[DISPC_IRQ_EOI_OFF] =			0x24,
119 	[DISPC_IRQSTATUS_RAW_OFF] =		0x28,
120 	[DISPC_IRQSTATUS_OFF] =			0x2c,
121 	[DISPC_IRQENABLE_SET_OFF] =		0x30,
122 	[DISPC_IRQENABLE_CLR_OFF] =		0x40,
123 	[DISPC_VID_IRQENABLE_OFF] =		0x44,
124 	[DISPC_VID_IRQSTATUS_OFF] =		0x58,
125 	[DISPC_VP_IRQENABLE_OFF] =		0x70,
126 	[DISPC_VP_IRQSTATUS_OFF] =		0x7c,
127 
128 	[WB_IRQENABLE_OFF] =			0x88,
129 	[WB_IRQSTATUS_OFF] =			0x8c,
130 
131 	[DISPC_GLOBAL_MFLAG_ATTRIBUTE_OFF] =	0x90,
132 	[DISPC_GLOBAL_OUTPUT_ENABLE_OFF] =	0x94,
133 	[DISPC_GLOBAL_BUFFER_OFF] =		0x98,
134 	[DSS_CBA_CFG_OFF] =			0x9c,
135 	[DISPC_DBG_CONTROL_OFF] =		0xa0,
136 	[DISPC_DBG_STATUS_OFF] =		0xa4,
137 	[DISPC_CLKGATING_DISABLE_OFF] =		0xa8,
138 	[DISPC_SECURE_DISABLE_OFF] =		0xac,
139 };
140 
141 const struct dispc_features dispc_am65x_feats = {
142 	.max_pclk_khz = {
143 		[DISPC_VP_DPI] = 165000,
144 		[DISPC_VP_OLDI] = 165000,
145 	},
146 
147 	.scaling = {
148 		.in_width_max_5tap_rgb = 1280,
149 		.in_width_max_3tap_rgb = 2560,
150 		.in_width_max_5tap_yuv = 2560,
151 		.in_width_max_3tap_yuv = 4096,
152 		.upscale_limit = 16,
153 		.downscale_limit_5tap = 4,
154 		.downscale_limit_3tap = 2,
155 		/*
156 		 * The max supported pixel inc value is 255. The value
157 		 * of pixel inc is calculated like this: 1+(xinc-1)*bpp.
158 		 * The maximum bpp of all formats supported by the HW
159 		 * is 8. So the maximum supported xinc value is 32,
160 		 * because 1+(32-1)*8 < 255 < 1+(33-1)*4.
161 		 */
162 		.xinc_max = 32,
163 	},
164 
165 	.subrev = DISPC_AM65X,
166 
167 	.common = "common",
168 	.common_regs = tidss_am65x_common_regs,
169 
170 	.num_vps = 2,
171 	.vp_name = { "vp1", "vp2" },
172 	.ovr_name = { "ovr1", "ovr2" },
173 	.vpclk_name =  { "vp1", "vp2" },
174 	.vp_bus_type = { DISPC_VP_OLDI, DISPC_VP_DPI },
175 
176 	.vp_feat = { .color = {
177 			.has_ctm = true,
178 			.gamma_size = 256,
179 			.gamma_type = TIDSS_GAMMA_8BIT,
180 		},
181 	},
182 
183 	.num_planes = 2,
184 	/* note: vid is plane_id 0 and vidl1 is plane_id 1 */
185 	.vid_name = { "vid", "vidl1" },
186 	.vid_lite = { false, true, },
187 	.vid_order = { 1, 0 },
188 };
189 
190 static const u16 tidss_j721e_common_regs[DISPC_COMMON_REG_TABLE_LEN] = {
191 	[DSS_REVISION_OFF] =			0x4,
192 	[DSS_SYSCONFIG_OFF] =			0x8,
193 	[DSS_SYSSTATUS_OFF] =			0x20,
194 	[DISPC_IRQ_EOI_OFF] =			0x80,
195 	[DISPC_IRQSTATUS_RAW_OFF] =		0x28,
196 	[DISPC_IRQSTATUS_OFF] =			0x2c,
197 	[DISPC_IRQENABLE_SET_OFF] =		0x30,
198 	[DISPC_IRQENABLE_CLR_OFF] =		0x34,
199 	[DISPC_VID_IRQENABLE_OFF] =		0x38,
200 	[DISPC_VID_IRQSTATUS_OFF] =		0x48,
201 	[DISPC_VP_IRQENABLE_OFF] =		0x58,
202 	[DISPC_VP_IRQSTATUS_OFF] =		0x68,
203 
204 	[WB_IRQENABLE_OFF] =			0x78,
205 	[WB_IRQSTATUS_OFF] =			0x7c,
206 
207 	[DISPC_GLOBAL_MFLAG_ATTRIBUTE_OFF] =	0x98,
208 	[DISPC_GLOBAL_OUTPUT_ENABLE_OFF] =	0x9c,
209 	[DISPC_GLOBAL_BUFFER_OFF] =		0xa0,
210 	[DSS_CBA_CFG_OFF] =			0xa4,
211 	[DISPC_DBG_CONTROL_OFF] =		0xa8,
212 	[DISPC_DBG_STATUS_OFF] =		0xac,
213 	[DISPC_CLKGATING_DISABLE_OFF] =		0xb0,
214 	[DISPC_SECURE_DISABLE_OFF] =		0x90,
215 
216 	[FBDC_REVISION_1_OFF] =			0xb8,
217 	[FBDC_REVISION_2_OFF] =			0xbc,
218 	[FBDC_REVISION_3_OFF] =			0xc0,
219 	[FBDC_REVISION_4_OFF] =			0xc4,
220 	[FBDC_REVISION_5_OFF] =			0xc8,
221 	[FBDC_REVISION_6_OFF] =			0xcc,
222 	[FBDC_COMMON_CONTROL_OFF] =		0xd0,
223 	[FBDC_CONSTANT_COLOR_0_OFF] =		0xd4,
224 	[FBDC_CONSTANT_COLOR_1_OFF] =		0xd8,
225 	[DISPC_CONNECTIONS_OFF] =		0xe4,
226 	[DISPC_MSS_VP1_OFF] =			0xe8,
227 	[DISPC_MSS_VP3_OFF] =			0xec,
228 };
229 
230 const struct dispc_features dispc_j721e_feats = {
231 	.max_pclk_khz = {
232 		[DISPC_VP_DPI] = 170000,
233 		[DISPC_VP_INTERNAL] = 600000,
234 	},
235 
236 	.scaling = {
237 		.in_width_max_5tap_rgb = 2048,
238 		.in_width_max_3tap_rgb = 4096,
239 		.in_width_max_5tap_yuv = 4096,
240 		.in_width_max_3tap_yuv = 4096,
241 		.upscale_limit = 16,
242 		.downscale_limit_5tap = 4,
243 		.downscale_limit_3tap = 2,
244 		/*
245 		 * The max supported pixel inc value is 255. The value
246 		 * of pixel inc is calculated like this: 1+(xinc-1)*bpp.
247 		 * The maximum bpp of all formats supported by the HW
248 		 * is 8. So the maximum supported xinc value is 32,
249 		 * because 1+(32-1)*8 < 255 < 1+(33-1)*4.
250 		 */
251 		.xinc_max = 32,
252 	},
253 
254 	.subrev = DISPC_J721E,
255 
256 	.common = "common_m",
257 	.common_regs = tidss_j721e_common_regs,
258 
259 	.num_vps = 4,
260 	.vp_name = { "vp1", "vp2", "vp3", "vp4" },
261 	.ovr_name = { "ovr1", "ovr2", "ovr3", "ovr4" },
262 	.vpclk_name = { "vp1", "vp2", "vp3", "vp4" },
263 	/* Currently hard coded VP routing (see dispc_initial_config()) */
264 	.vp_bus_type =	{ DISPC_VP_INTERNAL, DISPC_VP_DPI,
265 			  DISPC_VP_INTERNAL, DISPC_VP_DPI, },
266 	.vp_feat = { .color = {
267 			.has_ctm = true,
268 			.gamma_size = 1024,
269 			.gamma_type = TIDSS_GAMMA_10BIT,
270 		},
271 	},
272 	.num_planes = 4,
273 	.vid_name = { "vid1", "vidl1", "vid2", "vidl2" },
274 	.vid_lite = { 0, 1, 0, 1, },
275 	.vid_order = { 1, 3, 0, 2 },
276 };
277 
278 static const u16 *dispc_common_regmap;
279 
280 struct dss_vp_data {
281 	u32 *gamma_table;
282 };
283 
284 struct dispc_device {
285 	struct tidss_device *tidss;
286 	struct device *dev;
287 
288 	void __iomem *base_common;
289 	void __iomem *base_vid[TIDSS_MAX_PLANES];
290 	void __iomem *base_ovr[TIDSS_MAX_PORTS];
291 	void __iomem *base_vp[TIDSS_MAX_PORTS];
292 
293 	struct regmap *oldi_io_ctrl;
294 
295 	struct clk *vp_clk[TIDSS_MAX_PORTS];
296 
297 	const struct dispc_features *feat;
298 
299 	struct clk *fclk;
300 
301 	bool is_enabled;
302 
303 	struct dss_vp_data vp_data[TIDSS_MAX_PORTS];
304 
305 	u32 *fourccs;
306 	u32 num_fourccs;
307 
308 	u32 memory_bandwidth_limit;
309 
310 	struct dispc_errata errata;
311 };
312 
313 static void dispc_write(struct dispc_device *dispc, u16 reg, u32 val)
314 {
315 	iowrite32(val, dispc->base_common + reg);
316 }
317 
318 static u32 dispc_read(struct dispc_device *dispc, u16 reg)
319 {
320 	return ioread32(dispc->base_common + reg);
321 }
322 
323 static
324 void dispc_vid_write(struct dispc_device *dispc, u32 hw_plane, u16 reg, u32 val)
325 {
326 	void __iomem *base = dispc->base_vid[hw_plane];
327 
328 	iowrite32(val, base + reg);
329 }
330 
331 static u32 dispc_vid_read(struct dispc_device *dispc, u32 hw_plane, u16 reg)
332 {
333 	void __iomem *base = dispc->base_vid[hw_plane];
334 
335 	return ioread32(base + reg);
336 }
337 
338 static void dispc_ovr_write(struct dispc_device *dispc, u32 hw_videoport,
339 			    u16 reg, u32 val)
340 {
341 	void __iomem *base = dispc->base_ovr[hw_videoport];
342 
343 	iowrite32(val, base + reg);
344 }
345 
346 static u32 dispc_ovr_read(struct dispc_device *dispc, u32 hw_videoport, u16 reg)
347 {
348 	void __iomem *base = dispc->base_ovr[hw_videoport];
349 
350 	return ioread32(base + reg);
351 }
352 
353 static void dispc_vp_write(struct dispc_device *dispc, u32 hw_videoport,
354 			   u16 reg, u32 val)
355 {
356 	void __iomem *base = dispc->base_vp[hw_videoport];
357 
358 	iowrite32(val, base + reg);
359 }
360 
361 static u32 dispc_vp_read(struct dispc_device *dispc, u32 hw_videoport, u16 reg)
362 {
363 	void __iomem *base = dispc->base_vp[hw_videoport];
364 
365 	return ioread32(base + reg);
366 }
367 
368 /*
369  * TRM gives bitfields as start:end, where start is the higher bit
370  * number. For example 7:0
371  */
372 
373 static u32 FLD_MASK(u32 start, u32 end)
374 {
375 	return ((1 << (start - end + 1)) - 1) << end;
376 }
377 
378 static u32 FLD_VAL(u32 val, u32 start, u32 end)
379 {
380 	return (val << end) & FLD_MASK(start, end);
381 }
382 
383 static u32 FLD_GET(u32 val, u32 start, u32 end)
384 {
385 	return (val & FLD_MASK(start, end)) >> end;
386 }
387 
388 static u32 FLD_MOD(u32 orig, u32 val, u32 start, u32 end)
389 {
390 	return (orig & ~FLD_MASK(start, end)) | FLD_VAL(val, start, end);
391 }
392 
393 static u32 REG_GET(struct dispc_device *dispc, u32 idx, u32 start, u32 end)
394 {
395 	return FLD_GET(dispc_read(dispc, idx), start, end);
396 }
397 
398 static void REG_FLD_MOD(struct dispc_device *dispc, u32 idx, u32 val,
399 			u32 start, u32 end)
400 {
401 	dispc_write(dispc, idx, FLD_MOD(dispc_read(dispc, idx), val,
402 					start, end));
403 }
404 
405 static u32 VID_REG_GET(struct dispc_device *dispc, u32 hw_plane, u32 idx,
406 		       u32 start, u32 end)
407 {
408 	return FLD_GET(dispc_vid_read(dispc, hw_plane, idx), start, end);
409 }
410 
411 static void VID_REG_FLD_MOD(struct dispc_device *dispc, u32 hw_plane, u32 idx,
412 			    u32 val, u32 start, u32 end)
413 {
414 	dispc_vid_write(dispc, hw_plane, idx,
415 			FLD_MOD(dispc_vid_read(dispc, hw_plane, idx),
416 				val, start, end));
417 }
418 
419 static u32 VP_REG_GET(struct dispc_device *dispc, u32 vp, u32 idx,
420 		      u32 start, u32 end)
421 {
422 	return FLD_GET(dispc_vp_read(dispc, vp, idx), start, end);
423 }
424 
425 static void VP_REG_FLD_MOD(struct dispc_device *dispc, u32 vp, u32 idx, u32 val,
426 			   u32 start, u32 end)
427 {
428 	dispc_vp_write(dispc, vp, idx, FLD_MOD(dispc_vp_read(dispc, vp, idx),
429 					       val, start, end));
430 }
431 
432 __maybe_unused
433 static u32 OVR_REG_GET(struct dispc_device *dispc, u32 ovr, u32 idx,
434 		       u32 start, u32 end)
435 {
436 	return FLD_GET(dispc_ovr_read(dispc, ovr, idx), start, end);
437 }
438 
439 static void OVR_REG_FLD_MOD(struct dispc_device *dispc, u32 ovr, u32 idx,
440 			    u32 val, u32 start, u32 end)
441 {
442 	dispc_ovr_write(dispc, ovr, idx,
443 			FLD_MOD(dispc_ovr_read(dispc, ovr, idx),
444 				val, start, end));
445 }
446 
447 static dispc_irq_t dispc_vp_irq_from_raw(u32 stat, u32 hw_videoport)
448 {
449 	dispc_irq_t vp_stat = 0;
450 
451 	if (stat & BIT(0))
452 		vp_stat |= DSS_IRQ_VP_FRAME_DONE(hw_videoport);
453 	if (stat & BIT(1))
454 		vp_stat |= DSS_IRQ_VP_VSYNC_EVEN(hw_videoport);
455 	if (stat & BIT(2))
456 		vp_stat |= DSS_IRQ_VP_VSYNC_ODD(hw_videoport);
457 	if (stat & BIT(4))
458 		vp_stat |= DSS_IRQ_VP_SYNC_LOST(hw_videoport);
459 
460 	return vp_stat;
461 }
462 
463 static u32 dispc_vp_irq_to_raw(dispc_irq_t vpstat, u32 hw_videoport)
464 {
465 	u32 stat = 0;
466 
467 	if (vpstat & DSS_IRQ_VP_FRAME_DONE(hw_videoport))
468 		stat |= BIT(0);
469 	if (vpstat & DSS_IRQ_VP_VSYNC_EVEN(hw_videoport))
470 		stat |= BIT(1);
471 	if (vpstat & DSS_IRQ_VP_VSYNC_ODD(hw_videoport))
472 		stat |= BIT(2);
473 	if (vpstat & DSS_IRQ_VP_SYNC_LOST(hw_videoport))
474 		stat |= BIT(4);
475 
476 	return stat;
477 }
478 
479 static dispc_irq_t dispc_vid_irq_from_raw(u32 stat, u32 hw_plane)
480 {
481 	dispc_irq_t vid_stat = 0;
482 
483 	if (stat & BIT(0))
484 		vid_stat |= DSS_IRQ_PLANE_FIFO_UNDERFLOW(hw_plane);
485 
486 	return vid_stat;
487 }
488 
489 static u32 dispc_vid_irq_to_raw(dispc_irq_t vidstat, u32 hw_plane)
490 {
491 	u32 stat = 0;
492 
493 	if (vidstat & DSS_IRQ_PLANE_FIFO_UNDERFLOW(hw_plane))
494 		stat |= BIT(0);
495 
496 	return stat;
497 }
498 
499 static dispc_irq_t dispc_k2g_vp_read_irqstatus(struct dispc_device *dispc,
500 					       u32 hw_videoport)
501 {
502 	u32 stat = dispc_vp_read(dispc, hw_videoport, DISPC_VP_K2G_IRQSTATUS);
503 
504 	return dispc_vp_irq_from_raw(stat, hw_videoport);
505 }
506 
507 static void dispc_k2g_vp_write_irqstatus(struct dispc_device *dispc,
508 					 u32 hw_videoport, dispc_irq_t vpstat)
509 {
510 	u32 stat = dispc_vp_irq_to_raw(vpstat, hw_videoport);
511 
512 	dispc_vp_write(dispc, hw_videoport, DISPC_VP_K2G_IRQSTATUS, stat);
513 }
514 
515 static dispc_irq_t dispc_k2g_vid_read_irqstatus(struct dispc_device *dispc,
516 						u32 hw_plane)
517 {
518 	u32 stat = dispc_vid_read(dispc, hw_plane, DISPC_VID_K2G_IRQSTATUS);
519 
520 	return dispc_vid_irq_from_raw(stat, hw_plane);
521 }
522 
523 static void dispc_k2g_vid_write_irqstatus(struct dispc_device *dispc,
524 					  u32 hw_plane, dispc_irq_t vidstat)
525 {
526 	u32 stat = dispc_vid_irq_to_raw(vidstat, hw_plane);
527 
528 	dispc_vid_write(dispc, hw_plane, DISPC_VID_K2G_IRQSTATUS, stat);
529 }
530 
531 static dispc_irq_t dispc_k2g_vp_read_irqenable(struct dispc_device *dispc,
532 					       u32 hw_videoport)
533 {
534 	u32 stat = dispc_vp_read(dispc, hw_videoport, DISPC_VP_K2G_IRQENABLE);
535 
536 	return dispc_vp_irq_from_raw(stat, hw_videoport);
537 }
538 
539 static void dispc_k2g_vp_set_irqenable(struct dispc_device *dispc,
540 				       u32 hw_videoport, dispc_irq_t vpstat)
541 {
542 	u32 stat = dispc_vp_irq_to_raw(vpstat, hw_videoport);
543 
544 	dispc_vp_write(dispc, hw_videoport, DISPC_VP_K2G_IRQENABLE, stat);
545 }
546 
547 static dispc_irq_t dispc_k2g_vid_read_irqenable(struct dispc_device *dispc,
548 						u32 hw_plane)
549 {
550 	u32 stat = dispc_vid_read(dispc, hw_plane, DISPC_VID_K2G_IRQENABLE);
551 
552 	return dispc_vid_irq_from_raw(stat, hw_plane);
553 }
554 
555 static void dispc_k2g_vid_set_irqenable(struct dispc_device *dispc,
556 					u32 hw_plane, dispc_irq_t vidstat)
557 {
558 	u32 stat = dispc_vid_irq_to_raw(vidstat, hw_plane);
559 
560 	dispc_vid_write(dispc, hw_plane, DISPC_VID_K2G_IRQENABLE, stat);
561 }
562 
563 static void dispc_k2g_clear_irqstatus(struct dispc_device *dispc,
564 				      dispc_irq_t mask)
565 {
566 	dispc_k2g_vp_write_irqstatus(dispc, 0, mask);
567 	dispc_k2g_vid_write_irqstatus(dispc, 0, mask);
568 }
569 
570 static
571 dispc_irq_t dispc_k2g_read_and_clear_irqstatus(struct dispc_device *dispc)
572 {
573 	dispc_irq_t stat = 0;
574 
575 	/* always clear the top level irqstatus */
576 	dispc_write(dispc, DISPC_IRQSTATUS,
577 		    dispc_read(dispc, DISPC_IRQSTATUS));
578 
579 	stat |= dispc_k2g_vp_read_irqstatus(dispc, 0);
580 	stat |= dispc_k2g_vid_read_irqstatus(dispc, 0);
581 
582 	dispc_k2g_clear_irqstatus(dispc, stat);
583 
584 	return stat;
585 }
586 
587 static dispc_irq_t dispc_k2g_read_irqenable(struct dispc_device *dispc)
588 {
589 	dispc_irq_t stat = 0;
590 
591 	stat |= dispc_k2g_vp_read_irqenable(dispc, 0);
592 	stat |= dispc_k2g_vid_read_irqenable(dispc, 0);
593 
594 	return stat;
595 }
596 
597 static
598 void dispc_k2g_set_irqenable(struct dispc_device *dispc, dispc_irq_t mask)
599 {
600 	dispc_irq_t old_mask = dispc_k2g_read_irqenable(dispc);
601 
602 	/* clear the irqstatus for newly enabled irqs */
603 	dispc_k2g_clear_irqstatus(dispc, (mask ^ old_mask) & mask);
604 
605 	dispc_k2g_vp_set_irqenable(dispc, 0, mask);
606 	dispc_k2g_vid_set_irqenable(dispc, 0, mask);
607 
608 	dispc_write(dispc, DISPC_IRQENABLE_SET, (1 << 0) | (1 << 7));
609 
610 	/* flush posted write */
611 	dispc_k2g_read_irqenable(dispc);
612 }
613 
614 static dispc_irq_t dispc_k3_vp_read_irqstatus(struct dispc_device *dispc,
615 					      u32 hw_videoport)
616 {
617 	u32 stat = dispc_read(dispc, DISPC_VP_IRQSTATUS(hw_videoport));
618 
619 	return dispc_vp_irq_from_raw(stat, hw_videoport);
620 }
621 
622 static void dispc_k3_vp_write_irqstatus(struct dispc_device *dispc,
623 					u32 hw_videoport, dispc_irq_t vpstat)
624 {
625 	u32 stat = dispc_vp_irq_to_raw(vpstat, hw_videoport);
626 
627 	dispc_write(dispc, DISPC_VP_IRQSTATUS(hw_videoport), stat);
628 }
629 
630 static dispc_irq_t dispc_k3_vid_read_irqstatus(struct dispc_device *dispc,
631 					       u32 hw_plane)
632 {
633 	u32 stat = dispc_read(dispc, DISPC_VID_IRQSTATUS(hw_plane));
634 
635 	return dispc_vid_irq_from_raw(stat, hw_plane);
636 }
637 
638 static void dispc_k3_vid_write_irqstatus(struct dispc_device *dispc,
639 					 u32 hw_plane, dispc_irq_t vidstat)
640 {
641 	u32 stat = dispc_vid_irq_to_raw(vidstat, hw_plane);
642 
643 	dispc_write(dispc, DISPC_VID_IRQSTATUS(hw_plane), stat);
644 }
645 
646 static dispc_irq_t dispc_k3_vp_read_irqenable(struct dispc_device *dispc,
647 					      u32 hw_videoport)
648 {
649 	u32 stat = dispc_read(dispc, DISPC_VP_IRQENABLE(hw_videoport));
650 
651 	return dispc_vp_irq_from_raw(stat, hw_videoport);
652 }
653 
654 static void dispc_k3_vp_set_irqenable(struct dispc_device *dispc,
655 				      u32 hw_videoport, dispc_irq_t vpstat)
656 {
657 	u32 stat = dispc_vp_irq_to_raw(vpstat, hw_videoport);
658 
659 	dispc_write(dispc, DISPC_VP_IRQENABLE(hw_videoport), stat);
660 }
661 
662 static dispc_irq_t dispc_k3_vid_read_irqenable(struct dispc_device *dispc,
663 					       u32 hw_plane)
664 {
665 	u32 stat = dispc_read(dispc, DISPC_VID_IRQENABLE(hw_plane));
666 
667 	return dispc_vid_irq_from_raw(stat, hw_plane);
668 }
669 
670 static void dispc_k3_vid_set_irqenable(struct dispc_device *dispc,
671 				       u32 hw_plane, dispc_irq_t vidstat)
672 {
673 	u32 stat = dispc_vid_irq_to_raw(vidstat, hw_plane);
674 
675 	dispc_write(dispc, DISPC_VID_IRQENABLE(hw_plane), stat);
676 }
677 
678 static
679 void dispc_k3_clear_irqstatus(struct dispc_device *dispc, dispc_irq_t clearmask)
680 {
681 	unsigned int i;
682 	u32 top_clear = 0;
683 
684 	for (i = 0; i < dispc->feat->num_vps; ++i) {
685 		if (clearmask & DSS_IRQ_VP_MASK(i)) {
686 			dispc_k3_vp_write_irqstatus(dispc, i, clearmask);
687 			top_clear |= BIT(i);
688 		}
689 	}
690 	for (i = 0; i < dispc->feat->num_planes; ++i) {
691 		if (clearmask & DSS_IRQ_PLANE_MASK(i)) {
692 			dispc_k3_vid_write_irqstatus(dispc, i, clearmask);
693 			top_clear |= BIT(4 + i);
694 		}
695 	}
696 	if (dispc->feat->subrev == DISPC_K2G)
697 		return;
698 
699 	dispc_write(dispc, DISPC_IRQSTATUS, top_clear);
700 
701 	/* Flush posted writes */
702 	dispc_read(dispc, DISPC_IRQSTATUS);
703 }
704 
705 static
706 dispc_irq_t dispc_k3_read_and_clear_irqstatus(struct dispc_device *dispc)
707 {
708 	dispc_irq_t status = 0;
709 	unsigned int i;
710 
711 	for (i = 0; i < dispc->feat->num_vps; ++i)
712 		status |= dispc_k3_vp_read_irqstatus(dispc, i);
713 
714 	for (i = 0; i < dispc->feat->num_planes; ++i)
715 		status |= dispc_k3_vid_read_irqstatus(dispc, i);
716 
717 	dispc_k3_clear_irqstatus(dispc, status);
718 
719 	return status;
720 }
721 
722 static dispc_irq_t dispc_k3_read_irqenable(struct dispc_device *dispc)
723 {
724 	dispc_irq_t enable = 0;
725 	unsigned int i;
726 
727 	for (i = 0; i < dispc->feat->num_vps; ++i)
728 		enable |= dispc_k3_vp_read_irqenable(dispc, i);
729 
730 	for (i = 0; i < dispc->feat->num_planes; ++i)
731 		enable |= dispc_k3_vid_read_irqenable(dispc, i);
732 
733 	return enable;
734 }
735 
736 static void dispc_k3_set_irqenable(struct dispc_device *dispc,
737 				   dispc_irq_t mask)
738 {
739 	unsigned int i;
740 	u32 main_enable = 0, main_disable = 0;
741 	dispc_irq_t old_mask;
742 
743 	old_mask = dispc_k3_read_irqenable(dispc);
744 
745 	/* clear the irqstatus for newly enabled irqs */
746 	dispc_k3_clear_irqstatus(dispc, (old_mask ^ mask) & mask);
747 
748 	for (i = 0; i < dispc->feat->num_vps; ++i) {
749 		dispc_k3_vp_set_irqenable(dispc, i, mask);
750 		if (mask & DSS_IRQ_VP_MASK(i))
751 			main_enable |= BIT(i);		/* VP IRQ */
752 		else
753 			main_disable |= BIT(i);		/* VP IRQ */
754 	}
755 
756 	for (i = 0; i < dispc->feat->num_planes; ++i) {
757 		dispc_k3_vid_set_irqenable(dispc, i, mask);
758 		if (mask & DSS_IRQ_PLANE_MASK(i))
759 			main_enable |= BIT(i + 4);	/* VID IRQ */
760 		else
761 			main_disable |= BIT(i + 4);	/* VID IRQ */
762 	}
763 
764 	if (main_enable)
765 		dispc_write(dispc, DISPC_IRQENABLE_SET, main_enable);
766 
767 	if (main_disable)
768 		dispc_write(dispc, DISPC_IRQENABLE_CLR, main_disable);
769 
770 	/* Flush posted writes */
771 	dispc_read(dispc, DISPC_IRQENABLE_SET);
772 }
773 
774 dispc_irq_t dispc_read_and_clear_irqstatus(struct dispc_device *dispc)
775 {
776 	switch (dispc->feat->subrev) {
777 	case DISPC_K2G:
778 		return dispc_k2g_read_and_clear_irqstatus(dispc);
779 	case DISPC_AM65X:
780 	case DISPC_J721E:
781 		return dispc_k3_read_and_clear_irqstatus(dispc);
782 	default:
783 		WARN_ON(1);
784 		return 0;
785 	}
786 }
787 
788 void dispc_set_irqenable(struct dispc_device *dispc, dispc_irq_t mask)
789 {
790 	switch (dispc->feat->subrev) {
791 	case DISPC_K2G:
792 		dispc_k2g_set_irqenable(dispc, mask);
793 		break;
794 	case DISPC_AM65X:
795 	case DISPC_J721E:
796 		dispc_k3_set_irqenable(dispc, mask);
797 		break;
798 	default:
799 		WARN_ON(1);
800 		break;
801 	}
802 }
803 
804 enum dispc_oldi_mode_reg_val { SPWG_18 = 0, JEIDA_24 = 1, SPWG_24 = 2 };
805 
806 struct dispc_bus_format {
807 	u32 bus_fmt;
808 	u32 data_width;
809 	bool is_oldi_fmt;
810 	enum dispc_oldi_mode_reg_val oldi_mode_reg_val;
811 };
812 
813 static const struct dispc_bus_format dispc_bus_formats[] = {
814 	{ MEDIA_BUS_FMT_RGB444_1X12,		12, false, 0 },
815 	{ MEDIA_BUS_FMT_RGB565_1X16,		16, false, 0 },
816 	{ MEDIA_BUS_FMT_RGB666_1X18,		18, false, 0 },
817 	{ MEDIA_BUS_FMT_RGB888_1X24,		24, false, 0 },
818 	{ MEDIA_BUS_FMT_RGB101010_1X30,		30, false, 0 },
819 	{ MEDIA_BUS_FMT_RGB121212_1X36,		36, false, 0 },
820 	{ MEDIA_BUS_FMT_RGB666_1X7X3_SPWG,	18, true, SPWG_18 },
821 	{ MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,	24, true, SPWG_24 },
822 	{ MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA,	24, true, JEIDA_24 },
823 };
824 
825 static const
826 struct dispc_bus_format *dispc_vp_find_bus_fmt(struct dispc_device *dispc,
827 					       u32 hw_videoport,
828 					       u32 bus_fmt, u32 bus_flags)
829 {
830 	unsigned int i;
831 
832 	for (i = 0; i < ARRAY_SIZE(dispc_bus_formats); ++i) {
833 		if (dispc_bus_formats[i].bus_fmt == bus_fmt)
834 			return &dispc_bus_formats[i];
835 	}
836 
837 	return NULL;
838 }
839 
840 int dispc_vp_bus_check(struct dispc_device *dispc, u32 hw_videoport,
841 		       const struct drm_crtc_state *state)
842 {
843 	const struct tidss_crtc_state *tstate = to_tidss_crtc_state(state);
844 	const struct dispc_bus_format *fmt;
845 
846 	fmt = dispc_vp_find_bus_fmt(dispc, hw_videoport, tstate->bus_format,
847 				    tstate->bus_flags);
848 	if (!fmt) {
849 		dev_dbg(dispc->dev, "%s: Unsupported bus format: %u\n",
850 			__func__, tstate->bus_format);
851 		return -EINVAL;
852 	}
853 
854 	if (dispc->feat->vp_bus_type[hw_videoport] != DISPC_VP_OLDI &&
855 	    fmt->is_oldi_fmt) {
856 		dev_dbg(dispc->dev, "%s: %s is not OLDI-port\n",
857 			__func__, dispc->feat->vp_name[hw_videoport]);
858 		return -EINVAL;
859 	}
860 
861 	return 0;
862 }
863 
864 static void dispc_oldi_tx_power(struct dispc_device *dispc, bool power)
865 {
866 	u32 val = power ? 0 : OLDI_PWRDN_TX;
867 
868 	if (WARN_ON(!dispc->oldi_io_ctrl))
869 		return;
870 
871 	regmap_update_bits(dispc->oldi_io_ctrl, OLDI_DAT0_IO_CTRL,
872 			   OLDI_PWRDN_TX, val);
873 	regmap_update_bits(dispc->oldi_io_ctrl, OLDI_DAT1_IO_CTRL,
874 			   OLDI_PWRDN_TX, val);
875 	regmap_update_bits(dispc->oldi_io_ctrl, OLDI_DAT2_IO_CTRL,
876 			   OLDI_PWRDN_TX, val);
877 	regmap_update_bits(dispc->oldi_io_ctrl, OLDI_DAT3_IO_CTRL,
878 			   OLDI_PWRDN_TX, val);
879 	regmap_update_bits(dispc->oldi_io_ctrl, OLDI_CLK_IO_CTRL,
880 			   OLDI_PWRDN_TX, val);
881 }
882 
883 static void dispc_set_num_datalines(struct dispc_device *dispc,
884 				    u32 hw_videoport, int num_lines)
885 {
886 	int v;
887 
888 	switch (num_lines) {
889 	case 12:
890 		v = 0; break;
891 	case 16:
892 		v = 1; break;
893 	case 18:
894 		v = 2; break;
895 	case 24:
896 		v = 3; break;
897 	case 30:
898 		v = 4; break;
899 	case 36:
900 		v = 5; break;
901 	default:
902 		WARN_ON(1);
903 		v = 3;
904 	}
905 
906 	VP_REG_FLD_MOD(dispc, hw_videoport, DISPC_VP_CONTROL, v, 10, 8);
907 }
908 
909 static void dispc_enable_oldi(struct dispc_device *dispc, u32 hw_videoport,
910 			      const struct dispc_bus_format *fmt)
911 {
912 	u32 oldi_cfg = 0;
913 	u32 oldi_reset_bit = BIT(5 + hw_videoport);
914 	int count = 0;
915 
916 	/*
917 	 * For the moment DUALMODESYNC, MASTERSLAVE, MODE, and SRC
918 	 * bits of DISPC_VP_DSS_OLDI_CFG are set statically to 0.
919 	 */
920 
921 	if (fmt->data_width == 24)
922 		oldi_cfg |= BIT(8); /* MSB */
923 	else if (fmt->data_width != 18)
924 		dev_warn(dispc->dev, "%s: %d port width not supported\n",
925 			 __func__, fmt->data_width);
926 
927 	oldi_cfg |= BIT(7); /* DEPOL */
928 
929 	oldi_cfg = FLD_MOD(oldi_cfg, fmt->oldi_mode_reg_val, 3, 1);
930 
931 	oldi_cfg |= BIT(12); /* SOFTRST */
932 
933 	oldi_cfg |= BIT(0); /* ENABLE */
934 
935 	dispc_vp_write(dispc, hw_videoport, DISPC_VP_DSS_OLDI_CFG, oldi_cfg);
936 
937 	while (!(oldi_reset_bit & dispc_read(dispc, DSS_SYSSTATUS)) &&
938 	       count < 10000)
939 		count++;
940 
941 	if (!(oldi_reset_bit & dispc_read(dispc, DSS_SYSSTATUS)))
942 		dev_warn(dispc->dev, "%s: timeout waiting OLDI reset done\n",
943 			 __func__);
944 }
945 
946 void dispc_vp_prepare(struct dispc_device *dispc, u32 hw_videoport,
947 		      const struct drm_crtc_state *state)
948 {
949 	const struct tidss_crtc_state *tstate = to_tidss_crtc_state(state);
950 	const struct dispc_bus_format *fmt;
951 
952 	fmt = dispc_vp_find_bus_fmt(dispc, hw_videoport, tstate->bus_format,
953 				    tstate->bus_flags);
954 
955 	if (WARN_ON(!fmt))
956 		return;
957 
958 	if (dispc->feat->vp_bus_type[hw_videoport] == DISPC_VP_OLDI) {
959 		dispc_oldi_tx_power(dispc, true);
960 
961 		dispc_enable_oldi(dispc, hw_videoport, fmt);
962 	}
963 }
964 
965 void dispc_vp_enable(struct dispc_device *dispc, u32 hw_videoport,
966 		     const struct drm_crtc_state *state)
967 {
968 	const struct drm_display_mode *mode = &state->adjusted_mode;
969 	const struct tidss_crtc_state *tstate = to_tidss_crtc_state(state);
970 	bool align, onoff, rf, ieo, ipc, ihs, ivs;
971 	const struct dispc_bus_format *fmt;
972 	u32 hsw, hfp, hbp, vsw, vfp, vbp;
973 
974 	fmt = dispc_vp_find_bus_fmt(dispc, hw_videoport, tstate->bus_format,
975 				    tstate->bus_flags);
976 
977 	if (WARN_ON(!fmt))
978 		return;
979 
980 	dispc_set_num_datalines(dispc, hw_videoport, fmt->data_width);
981 
982 	hfp = mode->hsync_start - mode->hdisplay;
983 	hsw = mode->hsync_end - mode->hsync_start;
984 	hbp = mode->htotal - mode->hsync_end;
985 
986 	vfp = mode->vsync_start - mode->vdisplay;
987 	vsw = mode->vsync_end - mode->vsync_start;
988 	vbp = mode->vtotal - mode->vsync_end;
989 
990 	dispc_vp_write(dispc, hw_videoport, DISPC_VP_TIMING_H,
991 		       FLD_VAL(hsw - 1, 7, 0) |
992 		       FLD_VAL(hfp - 1, 19, 8) |
993 		       FLD_VAL(hbp - 1, 31, 20));
994 
995 	dispc_vp_write(dispc, hw_videoport, DISPC_VP_TIMING_V,
996 		       FLD_VAL(vsw - 1, 7, 0) |
997 		       FLD_VAL(vfp, 19, 8) |
998 		       FLD_VAL(vbp, 31, 20));
999 
1000 	ivs = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
1001 
1002 	ihs = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
1003 
1004 	ieo = !!(tstate->bus_flags & DRM_BUS_FLAG_DE_LOW);
1005 
1006 	ipc = !!(tstate->bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE);
1007 
1008 	/* always use the 'rf' setting */
1009 	onoff = true;
1010 
1011 	rf = !!(tstate->bus_flags & DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE);
1012 
1013 	/* always use aligned syncs */
1014 	align = true;
1015 
1016 	/* always use DE_HIGH for OLDI */
1017 	if (dispc->feat->vp_bus_type[hw_videoport] == DISPC_VP_OLDI)
1018 		ieo = false;
1019 
1020 	dispc_vp_write(dispc, hw_videoport, DISPC_VP_POL_FREQ,
1021 		       FLD_VAL(align, 18, 18) |
1022 		       FLD_VAL(onoff, 17, 17) |
1023 		       FLD_VAL(rf, 16, 16) |
1024 		       FLD_VAL(ieo, 15, 15) |
1025 		       FLD_VAL(ipc, 14, 14) |
1026 		       FLD_VAL(ihs, 13, 13) |
1027 		       FLD_VAL(ivs, 12, 12));
1028 
1029 	dispc_vp_write(dispc, hw_videoport, DISPC_VP_SIZE_SCREEN,
1030 		       FLD_VAL(mode->hdisplay - 1, 11, 0) |
1031 		       FLD_VAL(mode->vdisplay - 1, 27, 16));
1032 
1033 	VP_REG_FLD_MOD(dispc, hw_videoport, DISPC_VP_CONTROL, 1, 0, 0);
1034 }
1035 
1036 void dispc_vp_disable(struct dispc_device *dispc, u32 hw_videoport)
1037 {
1038 	VP_REG_FLD_MOD(dispc, hw_videoport, DISPC_VP_CONTROL, 0, 0, 0);
1039 }
1040 
1041 void dispc_vp_unprepare(struct dispc_device *dispc, u32 hw_videoport)
1042 {
1043 	if (dispc->feat->vp_bus_type[hw_videoport] == DISPC_VP_OLDI) {
1044 		dispc_vp_write(dispc, hw_videoport, DISPC_VP_DSS_OLDI_CFG, 0);
1045 
1046 		dispc_oldi_tx_power(dispc, false);
1047 	}
1048 }
1049 
1050 bool dispc_vp_go_busy(struct dispc_device *dispc, u32 hw_videoport)
1051 {
1052 	return VP_REG_GET(dispc, hw_videoport, DISPC_VP_CONTROL, 5, 5);
1053 }
1054 
1055 void dispc_vp_go(struct dispc_device *dispc, u32 hw_videoport)
1056 {
1057 	WARN_ON(VP_REG_GET(dispc, hw_videoport, DISPC_VP_CONTROL, 5, 5));
1058 	VP_REG_FLD_MOD(dispc, hw_videoport, DISPC_VP_CONTROL, 1, 5, 5);
1059 }
1060 
1061 enum c8_to_c12_mode { C8_TO_C12_REPLICATE, C8_TO_C12_MAX, C8_TO_C12_MIN };
1062 
1063 static u16 c8_to_c12(u8 c8, enum c8_to_c12_mode mode)
1064 {
1065 	u16 c12;
1066 
1067 	c12 = c8 << 4;
1068 
1069 	switch (mode) {
1070 	case C8_TO_C12_REPLICATE:
1071 		/* Copy c8 4 MSB to 4 LSB for full scale c12 */
1072 		c12 |= c8 >> 4;
1073 		break;
1074 	case C8_TO_C12_MAX:
1075 		c12 |= 0xF;
1076 		break;
1077 	default:
1078 	case C8_TO_C12_MIN:
1079 		break;
1080 	}
1081 
1082 	return c12;
1083 }
1084 
1085 static u64 argb8888_to_argb12121212(u32 argb8888, enum c8_to_c12_mode m)
1086 {
1087 	u8 a, r, g, b;
1088 	u64 v;
1089 
1090 	a = (argb8888 >> 24) & 0xff;
1091 	r = (argb8888 >> 16) & 0xff;
1092 	g = (argb8888 >> 8) & 0xff;
1093 	b = (argb8888 >> 0) & 0xff;
1094 
1095 	v = ((u64)c8_to_c12(a, m) << 36) | ((u64)c8_to_c12(r, m) << 24) |
1096 		((u64)c8_to_c12(g, m) << 12) | (u64)c8_to_c12(b, m);
1097 
1098 	return v;
1099 }
1100 
1101 static void dispc_vp_set_default_color(struct dispc_device *dispc,
1102 				       u32 hw_videoport, u32 default_color)
1103 {
1104 	u64 v;
1105 
1106 	v = argb8888_to_argb12121212(default_color, C8_TO_C12_REPLICATE);
1107 
1108 	dispc_ovr_write(dispc, hw_videoport,
1109 			DISPC_OVR_DEFAULT_COLOR, v & 0xffffffff);
1110 	dispc_ovr_write(dispc, hw_videoport,
1111 			DISPC_OVR_DEFAULT_COLOR2, (v >> 32) & 0xffff);
1112 }
1113 
1114 enum drm_mode_status dispc_vp_mode_valid(struct dispc_device *dispc,
1115 					 u32 hw_videoport,
1116 					 const struct drm_display_mode *mode)
1117 {
1118 	u32 hsw, hfp, hbp, vsw, vfp, vbp;
1119 	enum dispc_vp_bus_type bus_type;
1120 	int max_pclk;
1121 
1122 	bus_type = dispc->feat->vp_bus_type[hw_videoport];
1123 
1124 	max_pclk = dispc->feat->max_pclk_khz[bus_type];
1125 
1126 	if (WARN_ON(max_pclk == 0))
1127 		return MODE_BAD;
1128 
1129 	if (mode->clock < dispc->feat->min_pclk_khz)
1130 		return MODE_CLOCK_LOW;
1131 
1132 	if (mode->clock > max_pclk)
1133 		return MODE_CLOCK_HIGH;
1134 
1135 	if (mode->hdisplay > 4096)
1136 		return MODE_BAD;
1137 
1138 	if (mode->vdisplay > 4096)
1139 		return MODE_BAD;
1140 
1141 	/* TODO: add interlace support */
1142 	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
1143 		return MODE_NO_INTERLACE;
1144 
1145 	/*
1146 	 * Enforce the output width is divisible by 2. Actually this
1147 	 * is only needed in following cases:
1148 	 * - YUV output selected (BT656, BT1120)
1149 	 * - Dithering enabled
1150 	 * - TDM with TDMCycleFormat == 3
1151 	 * But for simplicity we enforce that always.
1152 	 */
1153 	if ((mode->hdisplay % 2) != 0)
1154 		return MODE_BAD_HVALUE;
1155 
1156 	hfp = mode->hsync_start - mode->hdisplay;
1157 	hsw = mode->hsync_end - mode->hsync_start;
1158 	hbp = mode->htotal - mode->hsync_end;
1159 
1160 	vfp = mode->vsync_start - mode->vdisplay;
1161 	vsw = mode->vsync_end - mode->vsync_start;
1162 	vbp = mode->vtotal - mode->vsync_end;
1163 
1164 	if (hsw < 1 || hsw > 256 ||
1165 	    hfp < 1 || hfp > 4096 ||
1166 	    hbp < 1 || hbp > 4096)
1167 		return MODE_BAD_HVALUE;
1168 
1169 	if (vsw < 1 || vsw > 256 ||
1170 	    vfp > 4095 || vbp > 4095)
1171 		return MODE_BAD_VVALUE;
1172 
1173 	if (dispc->memory_bandwidth_limit) {
1174 		const unsigned int bpp = 4;
1175 		u64 bandwidth;
1176 
1177 		bandwidth = 1000 * mode->clock;
1178 		bandwidth = bandwidth * mode->hdisplay * mode->vdisplay * bpp;
1179 		bandwidth = div_u64(bandwidth, mode->htotal * mode->vtotal);
1180 
1181 		if (dispc->memory_bandwidth_limit < bandwidth)
1182 			return MODE_BAD;
1183 	}
1184 
1185 	return MODE_OK;
1186 }
1187 
1188 int dispc_vp_enable_clk(struct dispc_device *dispc, u32 hw_videoport)
1189 {
1190 	int ret = clk_prepare_enable(dispc->vp_clk[hw_videoport]);
1191 
1192 	if (ret)
1193 		dev_err(dispc->dev, "%s: enabling clk failed: %d\n", __func__,
1194 			ret);
1195 
1196 	return ret;
1197 }
1198 
1199 void dispc_vp_disable_clk(struct dispc_device *dispc, u32 hw_videoport)
1200 {
1201 	clk_disable_unprepare(dispc->vp_clk[hw_videoport]);
1202 }
1203 
1204 /*
1205  * Calculate the percentage difference between the requested pixel clock rate
1206  * and the effective rate resulting from calculating the clock divider value.
1207  */
1208 static
1209 unsigned int dispc_pclk_diff(unsigned long rate, unsigned long real_rate)
1210 {
1211 	int r = rate / 100, rr = real_rate / 100;
1212 
1213 	return (unsigned int)(abs(((rr - r) * 100) / r));
1214 }
1215 
1216 int dispc_vp_set_clk_rate(struct dispc_device *dispc, u32 hw_videoport,
1217 			  unsigned long rate)
1218 {
1219 	int r;
1220 	unsigned long new_rate;
1221 
1222 	r = clk_set_rate(dispc->vp_clk[hw_videoport], rate);
1223 	if (r) {
1224 		dev_err(dispc->dev, "vp%d: failed to set clk rate to %lu\n",
1225 			hw_videoport, rate);
1226 		return r;
1227 	}
1228 
1229 	new_rate = clk_get_rate(dispc->vp_clk[hw_videoport]);
1230 
1231 	if (dispc_pclk_diff(rate, new_rate) > 5)
1232 		dev_warn(dispc->dev,
1233 			 "vp%d: Clock rate %lu differs over 5%% from requested %lu\n",
1234 			 hw_videoport, new_rate, rate);
1235 
1236 	dev_dbg(dispc->dev, "vp%d: new rate %lu Hz (requested %lu Hz)\n",
1237 		hw_videoport, clk_get_rate(dispc->vp_clk[hw_videoport]), rate);
1238 
1239 	return 0;
1240 }
1241 
1242 /* OVR */
1243 static void dispc_k2g_ovr_set_plane(struct dispc_device *dispc,
1244 				    u32 hw_plane, u32 hw_videoport,
1245 				    u32 x, u32 y, u32 layer)
1246 {
1247 	/* On k2g there is only one plane and no need for ovr */
1248 	dispc_vid_write(dispc, hw_plane, DISPC_VID_K2G_POSITION,
1249 			x | (y << 16));
1250 }
1251 
1252 static void dispc_am65x_ovr_set_plane(struct dispc_device *dispc,
1253 				      u32 hw_plane, u32 hw_videoport,
1254 				      u32 x, u32 y, u32 layer)
1255 {
1256 	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES(layer),
1257 			hw_plane, 4, 1);
1258 	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES(layer),
1259 			x, 17, 6);
1260 	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES(layer),
1261 			y, 30, 19);
1262 }
1263 
1264 static void dispc_j721e_ovr_set_plane(struct dispc_device *dispc,
1265 				      u32 hw_plane, u32 hw_videoport,
1266 				      u32 x, u32 y, u32 layer)
1267 {
1268 	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES(layer),
1269 			hw_plane, 4, 1);
1270 	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES2(layer),
1271 			x, 13, 0);
1272 	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES2(layer),
1273 			y, 29, 16);
1274 }
1275 
1276 void dispc_ovr_set_plane(struct dispc_device *dispc, u32 hw_plane,
1277 			 u32 hw_videoport, u32 x, u32 y, u32 layer)
1278 {
1279 	switch (dispc->feat->subrev) {
1280 	case DISPC_K2G:
1281 		dispc_k2g_ovr_set_plane(dispc, hw_plane, hw_videoport,
1282 					x, y, layer);
1283 		break;
1284 	case DISPC_AM65X:
1285 		dispc_am65x_ovr_set_plane(dispc, hw_plane, hw_videoport,
1286 					  x, y, layer);
1287 		break;
1288 	case DISPC_J721E:
1289 		dispc_j721e_ovr_set_plane(dispc, hw_plane, hw_videoport,
1290 					  x, y, layer);
1291 		break;
1292 	default:
1293 		WARN_ON(1);
1294 		break;
1295 	}
1296 }
1297 
1298 void dispc_ovr_enable_layer(struct dispc_device *dispc,
1299 			    u32 hw_videoport, u32 layer, bool enable)
1300 {
1301 	if (dispc->feat->subrev == DISPC_K2G)
1302 		return;
1303 
1304 	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES(layer),
1305 			!!enable, 0, 0);
1306 }
1307 
1308 /* CSC */
1309 enum csc_ctm {
1310 	CSC_RR, CSC_RG, CSC_RB,
1311 	CSC_GR, CSC_GG, CSC_GB,
1312 	CSC_BR, CSC_BG, CSC_BB,
1313 };
1314 
1315 enum csc_yuv2rgb {
1316 	CSC_RY, CSC_RCB, CSC_RCR,
1317 	CSC_GY, CSC_GCB, CSC_GCR,
1318 	CSC_BY, CSC_BCB, CSC_BCR,
1319 };
1320 
1321 enum csc_rgb2yuv {
1322 	CSC_YR,  CSC_YG,  CSC_YB,
1323 	CSC_CBR, CSC_CBG, CSC_CBB,
1324 	CSC_CRR, CSC_CRG, CSC_CRB,
1325 };
1326 
1327 struct dispc_csc_coef {
1328 	void (*to_regval)(const struct dispc_csc_coef *csc, u32 *regval);
1329 	int m[9];
1330 	int preoffset[3];
1331 	int postoffset[3];
1332 	enum { CLIP_LIMITED_RANGE = 0, CLIP_FULL_RANGE = 1, } cliping;
1333 	const char *name;
1334 };
1335 
1336 #define DISPC_CSC_REGVAL_LEN 8
1337 
1338 static
1339 void dispc_csc_offset_regval(const struct dispc_csc_coef *csc, u32 *regval)
1340 {
1341 #define OVAL(x, y) (FLD_VAL(x, 15, 3) | FLD_VAL(y, 31, 19))
1342 	regval[5] = OVAL(csc->preoffset[0], csc->preoffset[1]);
1343 	regval[6] = OVAL(csc->preoffset[2], csc->postoffset[0]);
1344 	regval[7] = OVAL(csc->postoffset[1], csc->postoffset[2]);
1345 #undef OVAL
1346 }
1347 
1348 #define CVAL(x, y) (FLD_VAL(x, 10, 0) | FLD_VAL(y, 26, 16))
1349 static
1350 void dispc_csc_yuv2rgb_regval(const struct dispc_csc_coef *csc, u32 *regval)
1351 {
1352 	regval[0] = CVAL(csc->m[CSC_RY], csc->m[CSC_RCR]);
1353 	regval[1] = CVAL(csc->m[CSC_RCB], csc->m[CSC_GY]);
1354 	regval[2] = CVAL(csc->m[CSC_GCR], csc->m[CSC_GCB]);
1355 	regval[3] = CVAL(csc->m[CSC_BY], csc->m[CSC_BCR]);
1356 	regval[4] = CVAL(csc->m[CSC_BCB], 0);
1357 
1358 	dispc_csc_offset_regval(csc, regval);
1359 }
1360 
1361 __maybe_unused static
1362 void dispc_csc_rgb2yuv_regval(const struct dispc_csc_coef *csc, u32 *regval)
1363 {
1364 	regval[0] = CVAL(csc->m[CSC_YR], csc->m[CSC_YG]);
1365 	regval[1] = CVAL(csc->m[CSC_YB], csc->m[CSC_CRR]);
1366 	regval[2] = CVAL(csc->m[CSC_CRG], csc->m[CSC_CRB]);
1367 	regval[3] = CVAL(csc->m[CSC_CBR], csc->m[CSC_CBG]);
1368 	regval[4] = CVAL(csc->m[CSC_CBB], 0);
1369 
1370 	dispc_csc_offset_regval(csc, regval);
1371 }
1372 
1373 static void dispc_csc_cpr_regval(const struct dispc_csc_coef *csc,
1374 				 u32 *regval)
1375 {
1376 	regval[0] = CVAL(csc->m[CSC_RR], csc->m[CSC_RG]);
1377 	regval[1] = CVAL(csc->m[CSC_RB], csc->m[CSC_GR]);
1378 	regval[2] = CVAL(csc->m[CSC_GG], csc->m[CSC_GB]);
1379 	regval[3] = CVAL(csc->m[CSC_BR], csc->m[CSC_BG]);
1380 	regval[4] = CVAL(csc->m[CSC_BB], 0);
1381 
1382 	dispc_csc_offset_regval(csc, regval);
1383 }
1384 
1385 #undef CVAL
1386 
1387 static void dispc_k2g_vid_write_csc(struct dispc_device *dispc, u32 hw_plane,
1388 				    const struct dispc_csc_coef *csc)
1389 {
1390 	static const u16 dispc_vid_csc_coef_reg[] = {
1391 		DISPC_VID_CSC_COEF(0), DISPC_VID_CSC_COEF(1),
1392 		DISPC_VID_CSC_COEF(2), DISPC_VID_CSC_COEF(3),
1393 		DISPC_VID_CSC_COEF(4), DISPC_VID_CSC_COEF(5),
1394 		DISPC_VID_CSC_COEF(6), /* K2G has no post offset support */
1395 	};
1396 	u32 regval[DISPC_CSC_REGVAL_LEN];
1397 	unsigned int i;
1398 
1399 	csc->to_regval(csc, regval);
1400 
1401 	if (regval[7] != 0)
1402 		dev_warn(dispc->dev, "%s: No post offset support for %s\n",
1403 			 __func__, csc->name);
1404 
1405 	for (i = 0; i < ARRAY_SIZE(dispc_vid_csc_coef_reg); i++)
1406 		dispc_vid_write(dispc, hw_plane, dispc_vid_csc_coef_reg[i],
1407 				regval[i]);
1408 }
1409 
1410 static void dispc_k3_vid_write_csc(struct dispc_device *dispc, u32 hw_plane,
1411 				   const struct dispc_csc_coef *csc)
1412 {
1413 	static const u16 dispc_vid_csc_coef_reg[DISPC_CSC_REGVAL_LEN] = {
1414 		DISPC_VID_CSC_COEF(0), DISPC_VID_CSC_COEF(1),
1415 		DISPC_VID_CSC_COEF(2), DISPC_VID_CSC_COEF(3),
1416 		DISPC_VID_CSC_COEF(4), DISPC_VID_CSC_COEF(5),
1417 		DISPC_VID_CSC_COEF(6), DISPC_VID_CSC_COEF7,
1418 	};
1419 	u32 regval[DISPC_CSC_REGVAL_LEN];
1420 	unsigned int i;
1421 
1422 	csc->to_regval(csc, regval);
1423 
1424 	for (i = 0; i < ARRAY_SIZE(dispc_vid_csc_coef_reg); i++)
1425 		dispc_vid_write(dispc, hw_plane, dispc_vid_csc_coef_reg[i],
1426 				regval[i]);
1427 }
1428 
1429 /* YUV -> RGB, ITU-R BT.601, full range */
1430 static const struct dispc_csc_coef csc_yuv2rgb_bt601_full = {
1431 	dispc_csc_yuv2rgb_regval,
1432 	{ 256,   0,  358,	/* ry, rcb, rcr |1.000  0.000  1.402|*/
1433 	  256, -88, -182,	/* gy, gcb, gcr |1.000 -0.344 -0.714|*/
1434 	  256, 452,    0, },	/* by, bcb, bcr |1.000  1.772  0.000|*/
1435 	{    0, -2048, -2048, },	/* full range */
1436 	{    0,     0,     0, },
1437 	CLIP_FULL_RANGE,
1438 	"BT.601 Full",
1439 };
1440 
1441 /* YUV -> RGB, ITU-R BT.601, limited range */
1442 static const struct dispc_csc_coef csc_yuv2rgb_bt601_lim = {
1443 	dispc_csc_yuv2rgb_regval,
1444 	{ 298,    0,  409,	/* ry, rcb, rcr |1.164  0.000  1.596|*/
1445 	  298, -100, -208,	/* gy, gcb, gcr |1.164 -0.392 -0.813|*/
1446 	  298,  516,    0, },	/* by, bcb, bcr |1.164  2.017  0.000|*/
1447 	{ -256, -2048, -2048, },	/* limited range */
1448 	{    0,     0,     0, },
1449 	CLIP_FULL_RANGE,
1450 	"BT.601 Limited",
1451 };
1452 
1453 /* YUV -> RGB, ITU-R BT.709, full range */
1454 static const struct dispc_csc_coef csc_yuv2rgb_bt709_full = {
1455 	dispc_csc_yuv2rgb_regval,
1456 	{ 256,	  0,  402,	/* ry, rcb, rcr |1.000	0.000  1.570|*/
1457 	  256,  -48, -120,	/* gy, gcb, gcr |1.000 -0.187 -0.467|*/
1458 	  256,  475,    0, },	/* by, bcb, bcr |1.000	1.856  0.000|*/
1459 	{    0, -2048, -2048, },	/* full range */
1460 	{    0,     0,     0, },
1461 	CLIP_FULL_RANGE,
1462 	"BT.709 Full",
1463 };
1464 
1465 /* YUV -> RGB, ITU-R BT.709, limited range */
1466 static const struct dispc_csc_coef csc_yuv2rgb_bt709_lim = {
1467 	dispc_csc_yuv2rgb_regval,
1468 	{ 298,    0,  459,	/* ry, rcb, rcr |1.164  0.000  1.793|*/
1469 	  298,  -55, -136,	/* gy, gcb, gcr |1.164 -0.213 -0.533|*/
1470 	  298,  541,    0, },	/* by, bcb, bcr |1.164  2.112  0.000|*/
1471 	{ -256, -2048, -2048, },	/* limited range */
1472 	{    0,     0,     0, },
1473 	CLIP_FULL_RANGE,
1474 	"BT.709 Limited",
1475 };
1476 
1477 static const struct {
1478 	enum drm_color_encoding encoding;
1479 	enum drm_color_range range;
1480 	const struct dispc_csc_coef *csc;
1481 } dispc_csc_table[] = {
1482 	{ DRM_COLOR_YCBCR_BT601, DRM_COLOR_YCBCR_FULL_RANGE,
1483 	  &csc_yuv2rgb_bt601_full, },
1484 	{ DRM_COLOR_YCBCR_BT601, DRM_COLOR_YCBCR_LIMITED_RANGE,
1485 	  &csc_yuv2rgb_bt601_lim, },
1486 	{ DRM_COLOR_YCBCR_BT709, DRM_COLOR_YCBCR_FULL_RANGE,
1487 	  &csc_yuv2rgb_bt709_full, },
1488 	{ DRM_COLOR_YCBCR_BT709, DRM_COLOR_YCBCR_LIMITED_RANGE,
1489 	  &csc_yuv2rgb_bt709_lim, },
1490 };
1491 
1492 static const
1493 struct dispc_csc_coef *dispc_find_csc(enum drm_color_encoding encoding,
1494 				      enum drm_color_range range)
1495 {
1496 	unsigned int i;
1497 
1498 	for (i = 0; i < ARRAY_SIZE(dispc_csc_table); i++) {
1499 		if (dispc_csc_table[i].encoding == encoding &&
1500 		    dispc_csc_table[i].range == range) {
1501 			return dispc_csc_table[i].csc;
1502 		}
1503 	}
1504 	return NULL;
1505 }
1506 
1507 static void dispc_vid_csc_setup(struct dispc_device *dispc, u32 hw_plane,
1508 				const struct drm_plane_state *state)
1509 {
1510 	const struct dispc_csc_coef *coef;
1511 
1512 	coef = dispc_find_csc(state->color_encoding, state->color_range);
1513 	if (!coef) {
1514 		dev_err(dispc->dev, "%s: CSC (%u,%u) not found\n",
1515 			__func__, state->color_encoding, state->color_range);
1516 		return;
1517 	}
1518 
1519 	if (dispc->feat->subrev == DISPC_K2G)
1520 		dispc_k2g_vid_write_csc(dispc, hw_plane, coef);
1521 	else
1522 		dispc_k3_vid_write_csc(dispc, hw_plane, coef);
1523 }
1524 
1525 static void dispc_vid_csc_enable(struct dispc_device *dispc, u32 hw_plane,
1526 				 bool enable)
1527 {
1528 	VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES, !!enable, 9, 9);
1529 }
1530 
1531 /* SCALER */
1532 
1533 static u32 dispc_calc_fir_inc(u32 in, u32 out)
1534 {
1535 	return (u32)div_u64(0x200000ull * in, out);
1536 }
1537 
1538 enum dispc_vid_fir_coef_set {
1539 	DISPC_VID_FIR_COEF_HORIZ,
1540 	DISPC_VID_FIR_COEF_HORIZ_UV,
1541 	DISPC_VID_FIR_COEF_VERT,
1542 	DISPC_VID_FIR_COEF_VERT_UV,
1543 };
1544 
1545 static void dispc_vid_write_fir_coefs(struct dispc_device *dispc,
1546 				      u32 hw_plane,
1547 				      enum dispc_vid_fir_coef_set coef_set,
1548 				      const struct tidss_scale_coefs *coefs)
1549 {
1550 	static const u16 c0_regs[] = {
1551 		[DISPC_VID_FIR_COEF_HORIZ] = DISPC_VID_FIR_COEFS_H0,
1552 		[DISPC_VID_FIR_COEF_HORIZ_UV] = DISPC_VID_FIR_COEFS_H0_C,
1553 		[DISPC_VID_FIR_COEF_VERT] = DISPC_VID_FIR_COEFS_V0,
1554 		[DISPC_VID_FIR_COEF_VERT_UV] = DISPC_VID_FIR_COEFS_V0_C,
1555 	};
1556 
1557 	static const u16 c12_regs[] = {
1558 		[DISPC_VID_FIR_COEF_HORIZ] = DISPC_VID_FIR_COEFS_H12,
1559 		[DISPC_VID_FIR_COEF_HORIZ_UV] = DISPC_VID_FIR_COEFS_H12_C,
1560 		[DISPC_VID_FIR_COEF_VERT] = DISPC_VID_FIR_COEFS_V12,
1561 		[DISPC_VID_FIR_COEF_VERT_UV] = DISPC_VID_FIR_COEFS_V12_C,
1562 	};
1563 
1564 	const u16 c0_base = c0_regs[coef_set];
1565 	const u16 c12_base = c12_regs[coef_set];
1566 	int phase;
1567 
1568 	if (!coefs) {
1569 		dev_err(dispc->dev, "%s: No coefficients given.\n", __func__);
1570 		return;
1571 	}
1572 
1573 	for (phase = 0; phase <= 8; ++phase) {
1574 		u16 reg = c0_base + phase * 4;
1575 		u16 c0 = coefs->c0[phase];
1576 
1577 		dispc_vid_write(dispc, hw_plane, reg, c0);
1578 	}
1579 
1580 	for (phase = 0; phase <= 15; ++phase) {
1581 		u16 reg = c12_base + phase * 4;
1582 		s16 c1, c2;
1583 		u32 c12;
1584 
1585 		c1 = coefs->c1[phase];
1586 		c2 = coefs->c2[phase];
1587 		c12 = FLD_VAL(c1, 19, 10) | FLD_VAL(c2, 29, 20);
1588 
1589 		dispc_vid_write(dispc, hw_plane, reg, c12);
1590 	}
1591 }
1592 
1593 static bool dispc_fourcc_is_yuv(u32 fourcc)
1594 {
1595 	switch (fourcc) {
1596 	case DRM_FORMAT_YUYV:
1597 	case DRM_FORMAT_UYVY:
1598 	case DRM_FORMAT_NV12:
1599 		return true;
1600 	default:
1601 		return false;
1602 	}
1603 }
1604 
1605 struct dispc_scaling_params {
1606 	int xinc, yinc;
1607 	u32 in_w, in_h, in_w_uv, in_h_uv;
1608 	u32 fir_xinc, fir_yinc, fir_xinc_uv, fir_yinc_uv;
1609 	bool scale_x, scale_y;
1610 	const struct tidss_scale_coefs *xcoef, *ycoef, *xcoef_uv, *ycoef_uv;
1611 	bool five_taps;
1612 };
1613 
1614 static int dispc_vid_calc_scaling(struct dispc_device *dispc,
1615 				  const struct drm_plane_state *state,
1616 				  struct dispc_scaling_params *sp,
1617 				  bool lite_plane)
1618 {
1619 	const struct dispc_features_scaling *f = &dispc->feat->scaling;
1620 	u32 fourcc = state->fb->format->format;
1621 	u32 in_width_max_5tap = f->in_width_max_5tap_rgb;
1622 	u32 in_width_max_3tap = f->in_width_max_3tap_rgb;
1623 	u32 downscale_limit;
1624 	u32 in_width_max;
1625 
1626 	memset(sp, 0, sizeof(*sp));
1627 	sp->xinc = 1;
1628 	sp->yinc = 1;
1629 	sp->in_w = state->src_w >> 16;
1630 	sp->in_w_uv = sp->in_w;
1631 	sp->in_h = state->src_h >> 16;
1632 	sp->in_h_uv = sp->in_h;
1633 
1634 	sp->scale_x = sp->in_w != state->crtc_w;
1635 	sp->scale_y = sp->in_h != state->crtc_h;
1636 
1637 	if (dispc_fourcc_is_yuv(fourcc)) {
1638 		in_width_max_5tap = f->in_width_max_5tap_yuv;
1639 		in_width_max_3tap = f->in_width_max_3tap_yuv;
1640 
1641 		sp->in_w_uv >>= 1;
1642 		sp->scale_x = true;
1643 
1644 		if (fourcc == DRM_FORMAT_NV12) {
1645 			sp->in_h_uv >>= 1;
1646 			sp->scale_y = true;
1647 		}
1648 	}
1649 
1650 	/* Skip the rest if no scaling is used */
1651 	if ((!sp->scale_x && !sp->scale_y) || lite_plane)
1652 		return 0;
1653 
1654 	if (sp->in_w > in_width_max_5tap) {
1655 		sp->five_taps = false;
1656 		in_width_max = in_width_max_3tap;
1657 		downscale_limit = f->downscale_limit_3tap;
1658 	} else {
1659 		sp->five_taps = true;
1660 		in_width_max = in_width_max_5tap;
1661 		downscale_limit = f->downscale_limit_5tap;
1662 	}
1663 
1664 	if (sp->scale_x) {
1665 		sp->fir_xinc = dispc_calc_fir_inc(sp->in_w, state->crtc_w);
1666 
1667 		if (sp->fir_xinc < dispc_calc_fir_inc(1, f->upscale_limit)) {
1668 			dev_dbg(dispc->dev,
1669 				"%s: X-scaling factor %u/%u > %u\n",
1670 				__func__, state->crtc_w, state->src_w >> 16,
1671 				f->upscale_limit);
1672 			return -EINVAL;
1673 		}
1674 
1675 		if (sp->fir_xinc >= dispc_calc_fir_inc(downscale_limit, 1)) {
1676 			sp->xinc = DIV_ROUND_UP(DIV_ROUND_UP(sp->in_w,
1677 							     state->crtc_w),
1678 						downscale_limit);
1679 
1680 			if (sp->xinc > f->xinc_max) {
1681 				dev_dbg(dispc->dev,
1682 					"%s: X-scaling factor %u/%u < 1/%u\n",
1683 					__func__, state->crtc_w,
1684 					state->src_w >> 16,
1685 					downscale_limit * f->xinc_max);
1686 				return -EINVAL;
1687 			}
1688 
1689 			sp->in_w = (state->src_w >> 16) / sp->xinc;
1690 		}
1691 
1692 		while (sp->in_w > in_width_max) {
1693 			sp->xinc++;
1694 			sp->in_w = (state->src_w >> 16) / sp->xinc;
1695 		}
1696 
1697 		if (sp->xinc > f->xinc_max) {
1698 			dev_dbg(dispc->dev,
1699 				"%s: Too wide input buffer %u > %u\n", __func__,
1700 				state->src_w >> 16, in_width_max * f->xinc_max);
1701 			return -EINVAL;
1702 		}
1703 
1704 		/*
1705 		 * We need even line length for YUV formats. Decimation
1706 		 * can lead to odd length, so we need to make it even
1707 		 * again.
1708 		 */
1709 		if (dispc_fourcc_is_yuv(fourcc))
1710 			sp->in_w &= ~1;
1711 
1712 		sp->fir_xinc = dispc_calc_fir_inc(sp->in_w, state->crtc_w);
1713 	}
1714 
1715 	if (sp->scale_y) {
1716 		sp->fir_yinc = dispc_calc_fir_inc(sp->in_h, state->crtc_h);
1717 
1718 		if (sp->fir_yinc < dispc_calc_fir_inc(1, f->upscale_limit)) {
1719 			dev_dbg(dispc->dev,
1720 				"%s: Y-scaling factor %u/%u > %u\n",
1721 				__func__, state->crtc_h, state->src_h >> 16,
1722 				f->upscale_limit);
1723 			return -EINVAL;
1724 		}
1725 
1726 		if (sp->fir_yinc >= dispc_calc_fir_inc(downscale_limit, 1)) {
1727 			sp->yinc = DIV_ROUND_UP(DIV_ROUND_UP(sp->in_h,
1728 							     state->crtc_h),
1729 						downscale_limit);
1730 
1731 			sp->in_h /= sp->yinc;
1732 			sp->fir_yinc = dispc_calc_fir_inc(sp->in_h,
1733 							  state->crtc_h);
1734 		}
1735 	}
1736 
1737 	dev_dbg(dispc->dev,
1738 		"%s: %ux%u decim %ux%u -> %ux%u firinc %u.%03ux%u.%03u taps %u -> %ux%u\n",
1739 		__func__, state->src_w >> 16, state->src_h >> 16,
1740 		sp->xinc, sp->yinc, sp->in_w, sp->in_h,
1741 		sp->fir_xinc / 0x200000u,
1742 		((sp->fir_xinc & 0x1FFFFFu) * 999u) / 0x1FFFFFu,
1743 		sp->fir_yinc / 0x200000u,
1744 		((sp->fir_yinc & 0x1FFFFFu) * 999u) / 0x1FFFFFu,
1745 		sp->five_taps ? 5 : 3,
1746 		state->crtc_w, state->crtc_h);
1747 
1748 	if (dispc_fourcc_is_yuv(fourcc)) {
1749 		if (sp->scale_x) {
1750 			sp->in_w_uv /= sp->xinc;
1751 			sp->fir_xinc_uv = dispc_calc_fir_inc(sp->in_w_uv,
1752 							     state->crtc_w);
1753 			sp->xcoef_uv = tidss_get_scale_coefs(dispc->dev,
1754 							     sp->fir_xinc_uv,
1755 							     true);
1756 		}
1757 		if (sp->scale_y) {
1758 			sp->in_h_uv /= sp->yinc;
1759 			sp->fir_yinc_uv = dispc_calc_fir_inc(sp->in_h_uv,
1760 							     state->crtc_h);
1761 			sp->ycoef_uv = tidss_get_scale_coefs(dispc->dev,
1762 							     sp->fir_yinc_uv,
1763 							     sp->five_taps);
1764 		}
1765 	}
1766 
1767 	if (sp->scale_x)
1768 		sp->xcoef = tidss_get_scale_coefs(dispc->dev, sp->fir_xinc,
1769 						  true);
1770 
1771 	if (sp->scale_y)
1772 		sp->ycoef = tidss_get_scale_coefs(dispc->dev, sp->fir_yinc,
1773 						  sp->five_taps);
1774 
1775 	return 0;
1776 }
1777 
1778 static void dispc_vid_set_scaling(struct dispc_device *dispc,
1779 				  u32 hw_plane,
1780 				  struct dispc_scaling_params *sp,
1781 				  u32 fourcc)
1782 {
1783 	/* HORIZONTAL RESIZE ENABLE */
1784 	VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES,
1785 			sp->scale_x, 7, 7);
1786 
1787 	/* VERTICAL RESIZE ENABLE */
1788 	VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES,
1789 			sp->scale_y, 8, 8);
1790 
1791 	/* Skip the rest if no scaling is used */
1792 	if (!sp->scale_x && !sp->scale_y)
1793 		return;
1794 
1795 	/* VERTICAL 5-TAPS  */
1796 	VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES,
1797 			sp->five_taps, 21, 21);
1798 
1799 	if (dispc_fourcc_is_yuv(fourcc)) {
1800 		if (sp->scale_x) {
1801 			dispc_vid_write(dispc, hw_plane, DISPC_VID_FIRH2,
1802 					sp->fir_xinc_uv);
1803 			dispc_vid_write_fir_coefs(dispc, hw_plane,
1804 						  DISPC_VID_FIR_COEF_HORIZ_UV,
1805 						  sp->xcoef_uv);
1806 		}
1807 		if (sp->scale_y) {
1808 			dispc_vid_write(dispc, hw_plane, DISPC_VID_FIRV2,
1809 					sp->fir_yinc_uv);
1810 			dispc_vid_write_fir_coefs(dispc, hw_plane,
1811 						  DISPC_VID_FIR_COEF_VERT_UV,
1812 						  sp->ycoef_uv);
1813 		}
1814 	}
1815 
1816 	if (sp->scale_x) {
1817 		dispc_vid_write(dispc, hw_plane, DISPC_VID_FIRH, sp->fir_xinc);
1818 		dispc_vid_write_fir_coefs(dispc, hw_plane,
1819 					  DISPC_VID_FIR_COEF_HORIZ,
1820 					  sp->xcoef);
1821 	}
1822 
1823 	if (sp->scale_y) {
1824 		dispc_vid_write(dispc, hw_plane, DISPC_VID_FIRV, sp->fir_yinc);
1825 		dispc_vid_write_fir_coefs(dispc, hw_plane,
1826 					  DISPC_VID_FIR_COEF_VERT, sp->ycoef);
1827 	}
1828 }
1829 
1830 /* OTHER */
1831 
1832 static const struct {
1833 	u32 fourcc;
1834 	u8 dss_code;
1835 } dispc_color_formats[] = {
1836 	{ DRM_FORMAT_ARGB4444, 0x0, },
1837 	{ DRM_FORMAT_ABGR4444, 0x1, },
1838 	{ DRM_FORMAT_RGBA4444, 0x2, },
1839 
1840 	{ DRM_FORMAT_RGB565, 0x3, },
1841 	{ DRM_FORMAT_BGR565, 0x4, },
1842 
1843 	{ DRM_FORMAT_ARGB1555, 0x5, },
1844 	{ DRM_FORMAT_ABGR1555, 0x6, },
1845 
1846 	{ DRM_FORMAT_ARGB8888, 0x7, },
1847 	{ DRM_FORMAT_ABGR8888, 0x8, },
1848 	{ DRM_FORMAT_RGBA8888, 0x9, },
1849 	{ DRM_FORMAT_BGRA8888, 0xa, },
1850 
1851 	{ DRM_FORMAT_RGB888, 0xb, },
1852 	{ DRM_FORMAT_BGR888, 0xc, },
1853 
1854 	{ DRM_FORMAT_ARGB2101010, 0xe, },
1855 	{ DRM_FORMAT_ABGR2101010, 0xf, },
1856 
1857 	{ DRM_FORMAT_XRGB4444, 0x20, },
1858 	{ DRM_FORMAT_XBGR4444, 0x21, },
1859 	{ DRM_FORMAT_RGBX4444, 0x22, },
1860 
1861 	{ DRM_FORMAT_ARGB1555, 0x25, },
1862 	{ DRM_FORMAT_ABGR1555, 0x26, },
1863 
1864 	{ DRM_FORMAT_XRGB8888, 0x27, },
1865 	{ DRM_FORMAT_XBGR8888, 0x28, },
1866 	{ DRM_FORMAT_RGBX8888, 0x29, },
1867 	{ DRM_FORMAT_BGRX8888, 0x2a, },
1868 
1869 	{ DRM_FORMAT_XRGB2101010, 0x2e, },
1870 	{ DRM_FORMAT_XBGR2101010, 0x2f, },
1871 
1872 	{ DRM_FORMAT_YUYV, 0x3e, },
1873 	{ DRM_FORMAT_UYVY, 0x3f, },
1874 
1875 	{ DRM_FORMAT_NV12, 0x3d, },
1876 };
1877 
1878 static void dispc_plane_set_pixel_format(struct dispc_device *dispc,
1879 					 u32 hw_plane, u32 fourcc)
1880 {
1881 	unsigned int i;
1882 
1883 	for (i = 0; i < ARRAY_SIZE(dispc_color_formats); ++i) {
1884 		if (dispc_color_formats[i].fourcc == fourcc) {
1885 			VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES,
1886 					dispc_color_formats[i].dss_code,
1887 					6, 1);
1888 			return;
1889 		}
1890 	}
1891 
1892 	WARN_ON(1);
1893 }
1894 
1895 const u32 *dispc_plane_formats(struct dispc_device *dispc, unsigned int *len)
1896 {
1897 	WARN_ON(!dispc->fourccs);
1898 
1899 	*len = dispc->num_fourccs;
1900 
1901 	return dispc->fourccs;
1902 }
1903 
1904 static s32 pixinc(int pixels, u8 ps)
1905 {
1906 	if (pixels == 1)
1907 		return 1;
1908 	else if (pixels > 1)
1909 		return 1 + (pixels - 1) * ps;
1910 	else if (pixels < 0)
1911 		return 1 - (-pixels + 1) * ps;
1912 
1913 	WARN_ON(1);
1914 	return 0;
1915 }
1916 
1917 int dispc_plane_check(struct dispc_device *dispc, u32 hw_plane,
1918 		      const struct drm_plane_state *state,
1919 		      u32 hw_videoport)
1920 {
1921 	bool lite = dispc->feat->vid_lite[hw_plane];
1922 	u32 fourcc = state->fb->format->format;
1923 	bool need_scaling = state->src_w >> 16 != state->crtc_w ||
1924 		state->src_h >> 16 != state->crtc_h;
1925 	struct dispc_scaling_params scaling;
1926 	int ret;
1927 
1928 	if (dispc_fourcc_is_yuv(fourcc)) {
1929 		if (!dispc_find_csc(state->color_encoding,
1930 				    state->color_range)) {
1931 			dev_dbg(dispc->dev,
1932 				"%s: Unsupported CSC (%u,%u) for HW plane %u\n",
1933 				__func__, state->color_encoding,
1934 				state->color_range, hw_plane);
1935 			return -EINVAL;
1936 		}
1937 	}
1938 
1939 	if (need_scaling) {
1940 		if (lite) {
1941 			dev_dbg(dispc->dev,
1942 				"%s: Lite plane %u can't scale %ux%u!=%ux%u\n",
1943 				__func__, hw_plane,
1944 				state->src_w >> 16, state->src_h >> 16,
1945 				state->crtc_w, state->crtc_h);
1946 			return -EINVAL;
1947 		}
1948 		ret = dispc_vid_calc_scaling(dispc, state, &scaling, false);
1949 		if (ret)
1950 			return ret;
1951 	}
1952 
1953 	return 0;
1954 }
1955 
1956 static
1957 dma_addr_t dispc_plane_state_dma_addr(const struct drm_plane_state *state)
1958 {
1959 	struct drm_framebuffer *fb = state->fb;
1960 	struct drm_gem_dma_object *gem;
1961 	u32 x = state->src_x >> 16;
1962 	u32 y = state->src_y >> 16;
1963 
1964 	gem = drm_fb_dma_get_gem_obj(state->fb, 0);
1965 
1966 	return gem->dma_addr + fb->offsets[0] + x * fb->format->cpp[0] +
1967 		y * fb->pitches[0];
1968 }
1969 
1970 static
1971 dma_addr_t dispc_plane_state_p_uv_addr(const struct drm_plane_state *state)
1972 {
1973 	struct drm_framebuffer *fb = state->fb;
1974 	struct drm_gem_dma_object *gem;
1975 	u32 x = state->src_x >> 16;
1976 	u32 y = state->src_y >> 16;
1977 
1978 	if (WARN_ON(state->fb->format->num_planes != 2))
1979 		return 0;
1980 
1981 	gem = drm_fb_dma_get_gem_obj(fb, 1);
1982 
1983 	return gem->dma_addr + fb->offsets[1] +
1984 		(x * fb->format->cpp[1] / fb->format->hsub) +
1985 		(y * fb->pitches[1] / fb->format->vsub);
1986 }
1987 
1988 int dispc_plane_setup(struct dispc_device *dispc, u32 hw_plane,
1989 		      const struct drm_plane_state *state,
1990 		      u32 hw_videoport)
1991 {
1992 	bool lite = dispc->feat->vid_lite[hw_plane];
1993 	u32 fourcc = state->fb->format->format;
1994 	u16 cpp = state->fb->format->cpp[0];
1995 	u32 fb_width = state->fb->pitches[0] / cpp;
1996 	dma_addr_t dma_addr = dispc_plane_state_dma_addr(state);
1997 	struct dispc_scaling_params scale;
1998 
1999 	dispc_vid_calc_scaling(dispc, state, &scale, lite);
2000 
2001 	dispc_plane_set_pixel_format(dispc, hw_plane, fourcc);
2002 
2003 	dispc_vid_write(dispc, hw_plane, DISPC_VID_BA_0, dma_addr & 0xffffffff);
2004 	dispc_vid_write(dispc, hw_plane, DISPC_VID_BA_EXT_0, (u64)dma_addr >> 32);
2005 	dispc_vid_write(dispc, hw_plane, DISPC_VID_BA_1, dma_addr & 0xffffffff);
2006 	dispc_vid_write(dispc, hw_plane, DISPC_VID_BA_EXT_1, (u64)dma_addr >> 32);
2007 
2008 	dispc_vid_write(dispc, hw_plane, DISPC_VID_PICTURE_SIZE,
2009 			(scale.in_w - 1) | ((scale.in_h - 1) << 16));
2010 
2011 	/* For YUV422 format we use the macropixel size for pixel inc */
2012 	if (fourcc == DRM_FORMAT_YUYV || fourcc == DRM_FORMAT_UYVY)
2013 		dispc_vid_write(dispc, hw_plane, DISPC_VID_PIXEL_INC,
2014 				pixinc(scale.xinc, cpp * 2));
2015 	else
2016 		dispc_vid_write(dispc, hw_plane, DISPC_VID_PIXEL_INC,
2017 				pixinc(scale.xinc, cpp));
2018 
2019 	dispc_vid_write(dispc, hw_plane, DISPC_VID_ROW_INC,
2020 			pixinc(1 + (scale.yinc * fb_width -
2021 				    scale.xinc * scale.in_w),
2022 			       cpp));
2023 
2024 	if (state->fb->format->num_planes == 2) {
2025 		u16 cpp_uv = state->fb->format->cpp[1];
2026 		u32 fb_width_uv = state->fb->pitches[1] / cpp_uv;
2027 		dma_addr_t p_uv_addr = dispc_plane_state_p_uv_addr(state);
2028 
2029 		dispc_vid_write(dispc, hw_plane,
2030 				DISPC_VID_BA_UV_0, p_uv_addr & 0xffffffff);
2031 		dispc_vid_write(dispc, hw_plane,
2032 				DISPC_VID_BA_UV_EXT_0, (u64)p_uv_addr >> 32);
2033 		dispc_vid_write(dispc, hw_plane,
2034 				DISPC_VID_BA_UV_1, p_uv_addr & 0xffffffff);
2035 		dispc_vid_write(dispc, hw_plane,
2036 				DISPC_VID_BA_UV_EXT_1, (u64)p_uv_addr >> 32);
2037 
2038 		dispc_vid_write(dispc, hw_plane, DISPC_VID_ROW_INC_UV,
2039 				pixinc(1 + (scale.yinc * fb_width_uv -
2040 					    scale.xinc * scale.in_w_uv),
2041 				       cpp_uv));
2042 	}
2043 
2044 	if (!lite) {
2045 		dispc_vid_write(dispc, hw_plane, DISPC_VID_SIZE,
2046 				(state->crtc_w - 1) |
2047 				((state->crtc_h - 1) << 16));
2048 
2049 		dispc_vid_set_scaling(dispc, hw_plane, &scale, fourcc);
2050 	}
2051 
2052 	/* enable YUV->RGB color conversion */
2053 	if (dispc_fourcc_is_yuv(fourcc)) {
2054 		dispc_vid_csc_setup(dispc, hw_plane, state);
2055 		dispc_vid_csc_enable(dispc, hw_plane, true);
2056 	} else {
2057 		dispc_vid_csc_enable(dispc, hw_plane, false);
2058 	}
2059 
2060 	dispc_vid_write(dispc, hw_plane, DISPC_VID_GLOBAL_ALPHA,
2061 			0xFF & (state->alpha >> 8));
2062 
2063 	if (state->pixel_blend_mode == DRM_MODE_BLEND_PREMULTI)
2064 		VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES, 1,
2065 				28, 28);
2066 	else
2067 		VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES, 0,
2068 				28, 28);
2069 
2070 	return 0;
2071 }
2072 
2073 int dispc_plane_enable(struct dispc_device *dispc, u32 hw_plane, bool enable)
2074 {
2075 	VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES, !!enable, 0, 0);
2076 
2077 	return 0;
2078 }
2079 
2080 static u32 dispc_vid_get_fifo_size(struct dispc_device *dispc, u32 hw_plane)
2081 {
2082 	return VID_REG_GET(dispc, hw_plane, DISPC_VID_BUF_SIZE_STATUS, 15, 0);
2083 }
2084 
2085 static void dispc_vid_set_mflag_threshold(struct dispc_device *dispc,
2086 					  u32 hw_plane, u32 low, u32 high)
2087 {
2088 	dispc_vid_write(dispc, hw_plane, DISPC_VID_MFLAG_THRESHOLD,
2089 			FLD_VAL(high, 31, 16) | FLD_VAL(low, 15, 0));
2090 }
2091 
2092 static void dispc_vid_set_buf_threshold(struct dispc_device *dispc,
2093 					u32 hw_plane, u32 low, u32 high)
2094 {
2095 	dispc_vid_write(dispc, hw_plane, DISPC_VID_BUF_THRESHOLD,
2096 			FLD_VAL(high, 31, 16) | FLD_VAL(low, 15, 0));
2097 }
2098 
2099 static void dispc_k2g_plane_init(struct dispc_device *dispc)
2100 {
2101 	unsigned int hw_plane;
2102 
2103 	dev_dbg(dispc->dev, "%s()\n", __func__);
2104 
2105 	/* MFLAG_CTRL = ENABLED */
2106 	REG_FLD_MOD(dispc, DISPC_GLOBAL_MFLAG_ATTRIBUTE, 2, 1, 0);
2107 	/* MFLAG_START = MFLAGNORMALSTARTMODE */
2108 	REG_FLD_MOD(dispc, DISPC_GLOBAL_MFLAG_ATTRIBUTE, 0, 6, 6);
2109 
2110 	for (hw_plane = 0; hw_plane < dispc->feat->num_planes; hw_plane++) {
2111 		u32 size = dispc_vid_get_fifo_size(dispc, hw_plane);
2112 		u32 thr_low, thr_high;
2113 		u32 mflag_low, mflag_high;
2114 		u32 preload;
2115 
2116 		thr_high = size - 1;
2117 		thr_low = size / 2;
2118 
2119 		mflag_high = size * 2 / 3;
2120 		mflag_low = size / 3;
2121 
2122 		preload = thr_low;
2123 
2124 		dev_dbg(dispc->dev,
2125 			"%s: bufsize %u, buf_threshold %u/%u, mflag threshold %u/%u preload %u\n",
2126 			dispc->feat->vid_name[hw_plane],
2127 			size,
2128 			thr_high, thr_low,
2129 			mflag_high, mflag_low,
2130 			preload);
2131 
2132 		dispc_vid_set_buf_threshold(dispc, hw_plane,
2133 					    thr_low, thr_high);
2134 		dispc_vid_set_mflag_threshold(dispc, hw_plane,
2135 					      mflag_low, mflag_high);
2136 
2137 		dispc_vid_write(dispc, hw_plane, DISPC_VID_PRELOAD, preload);
2138 
2139 		/*
2140 		 * Prefetch up to fifo high-threshold value to minimize the
2141 		 * possibility of underflows. Note that this means the PRELOAD
2142 		 * register is ignored.
2143 		 */
2144 		VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES, 1,
2145 				19, 19);
2146 	}
2147 }
2148 
2149 static void dispc_k3_plane_init(struct dispc_device *dispc)
2150 {
2151 	unsigned int hw_plane;
2152 	u32 cba_lo_pri = 1;
2153 	u32 cba_hi_pri = 0;
2154 
2155 	dev_dbg(dispc->dev, "%s()\n", __func__);
2156 
2157 	REG_FLD_MOD(dispc, DSS_CBA_CFG, cba_lo_pri, 2, 0);
2158 	REG_FLD_MOD(dispc, DSS_CBA_CFG, cba_hi_pri, 5, 3);
2159 
2160 	/* MFLAG_CTRL = ENABLED */
2161 	REG_FLD_MOD(dispc, DISPC_GLOBAL_MFLAG_ATTRIBUTE, 2, 1, 0);
2162 	/* MFLAG_START = MFLAGNORMALSTARTMODE */
2163 	REG_FLD_MOD(dispc, DISPC_GLOBAL_MFLAG_ATTRIBUTE, 0, 6, 6);
2164 
2165 	for (hw_plane = 0; hw_plane < dispc->feat->num_planes; hw_plane++) {
2166 		u32 size = dispc_vid_get_fifo_size(dispc, hw_plane);
2167 		u32 thr_low, thr_high;
2168 		u32 mflag_low, mflag_high;
2169 		u32 preload;
2170 
2171 		thr_high = size - 1;
2172 		thr_low = size / 2;
2173 
2174 		mflag_high = size * 2 / 3;
2175 		mflag_low = size / 3;
2176 
2177 		preload = thr_low;
2178 
2179 		dev_dbg(dispc->dev,
2180 			"%s: bufsize %u, buf_threshold %u/%u, mflag threshold %u/%u preload %u\n",
2181 			dispc->feat->vid_name[hw_plane],
2182 			size,
2183 			thr_high, thr_low,
2184 			mflag_high, mflag_low,
2185 			preload);
2186 
2187 		dispc_vid_set_buf_threshold(dispc, hw_plane,
2188 					    thr_low, thr_high);
2189 		dispc_vid_set_mflag_threshold(dispc, hw_plane,
2190 					      mflag_low, mflag_high);
2191 
2192 		dispc_vid_write(dispc, hw_plane, DISPC_VID_PRELOAD, preload);
2193 
2194 		/* Prefech up to PRELOAD value */
2195 		VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES, 0,
2196 				19, 19);
2197 	}
2198 }
2199 
2200 static void dispc_plane_init(struct dispc_device *dispc)
2201 {
2202 	switch (dispc->feat->subrev) {
2203 	case DISPC_K2G:
2204 		dispc_k2g_plane_init(dispc);
2205 		break;
2206 	case DISPC_AM65X:
2207 	case DISPC_J721E:
2208 		dispc_k3_plane_init(dispc);
2209 		break;
2210 	default:
2211 		WARN_ON(1);
2212 	}
2213 }
2214 
2215 static void dispc_vp_init(struct dispc_device *dispc)
2216 {
2217 	unsigned int i;
2218 
2219 	dev_dbg(dispc->dev, "%s()\n", __func__);
2220 
2221 	/* Enable the gamma Shadow bit-field for all VPs*/
2222 	for (i = 0; i < dispc->feat->num_vps; i++)
2223 		VP_REG_FLD_MOD(dispc, i, DISPC_VP_CONFIG, 1, 2, 2);
2224 }
2225 
2226 static void dispc_initial_config(struct dispc_device *dispc)
2227 {
2228 	dispc_plane_init(dispc);
2229 	dispc_vp_init(dispc);
2230 
2231 	/* Note: Hardcoded DPI routing on J721E for now */
2232 	if (dispc->feat->subrev == DISPC_J721E) {
2233 		dispc_write(dispc, DISPC_CONNECTIONS,
2234 			    FLD_VAL(2, 3, 0) |		/* VP1 to DPI0 */
2235 			    FLD_VAL(8, 7, 4)		/* VP3 to DPI1 */
2236 			);
2237 	}
2238 }
2239 
2240 static void dispc_k2g_vp_write_gamma_table(struct dispc_device *dispc,
2241 					   u32 hw_videoport)
2242 {
2243 	u32 *table = dispc->vp_data[hw_videoport].gamma_table;
2244 	u32 hwlen = dispc->feat->vp_feat.color.gamma_size;
2245 	unsigned int i;
2246 
2247 	dev_dbg(dispc->dev, "%s: hw_videoport %d\n", __func__, hw_videoport);
2248 
2249 	if (WARN_ON(dispc->feat->vp_feat.color.gamma_type != TIDSS_GAMMA_8BIT))
2250 		return;
2251 
2252 	for (i = 0; i < hwlen; ++i) {
2253 		u32 v = table[i];
2254 
2255 		v |= i << 24;
2256 
2257 		dispc_vp_write(dispc, hw_videoport, DISPC_VP_K2G_GAMMA_TABLE,
2258 			       v);
2259 	}
2260 }
2261 
2262 static void dispc_am65x_vp_write_gamma_table(struct dispc_device *dispc,
2263 					     u32 hw_videoport)
2264 {
2265 	u32 *table = dispc->vp_data[hw_videoport].gamma_table;
2266 	u32 hwlen = dispc->feat->vp_feat.color.gamma_size;
2267 	unsigned int i;
2268 
2269 	dev_dbg(dispc->dev, "%s: hw_videoport %d\n", __func__, hw_videoport);
2270 
2271 	if (WARN_ON(dispc->feat->vp_feat.color.gamma_type != TIDSS_GAMMA_8BIT))
2272 		return;
2273 
2274 	for (i = 0; i < hwlen; ++i) {
2275 		u32 v = table[i];
2276 
2277 		v |= i << 24;
2278 
2279 		dispc_vp_write(dispc, hw_videoport, DISPC_VP_GAMMA_TABLE, v);
2280 	}
2281 }
2282 
2283 static void dispc_j721e_vp_write_gamma_table(struct dispc_device *dispc,
2284 					     u32 hw_videoport)
2285 {
2286 	u32 *table = dispc->vp_data[hw_videoport].gamma_table;
2287 	u32 hwlen = dispc->feat->vp_feat.color.gamma_size;
2288 	unsigned int i;
2289 
2290 	dev_dbg(dispc->dev, "%s: hw_videoport %d\n", __func__, hw_videoport);
2291 
2292 	if (WARN_ON(dispc->feat->vp_feat.color.gamma_type != TIDSS_GAMMA_10BIT))
2293 		return;
2294 
2295 	for (i = 0; i < hwlen; ++i) {
2296 		u32 v = table[i];
2297 
2298 		if (i == 0)
2299 			v |= 1 << 31;
2300 
2301 		dispc_vp_write(dispc, hw_videoport, DISPC_VP_GAMMA_TABLE, v);
2302 	}
2303 }
2304 
2305 static void dispc_vp_write_gamma_table(struct dispc_device *dispc,
2306 				       u32 hw_videoport)
2307 {
2308 	switch (dispc->feat->subrev) {
2309 	case DISPC_K2G:
2310 		dispc_k2g_vp_write_gamma_table(dispc, hw_videoport);
2311 		break;
2312 	case DISPC_AM65X:
2313 		dispc_am65x_vp_write_gamma_table(dispc, hw_videoport);
2314 		break;
2315 	case DISPC_J721E:
2316 		dispc_j721e_vp_write_gamma_table(dispc, hw_videoport);
2317 		break;
2318 	default:
2319 		WARN_ON(1);
2320 		break;
2321 	}
2322 }
2323 
2324 static const struct drm_color_lut dispc_vp_gamma_default_lut[] = {
2325 	{ .red = 0, .green = 0, .blue = 0, },
2326 	{ .red = U16_MAX, .green = U16_MAX, .blue = U16_MAX, },
2327 };
2328 
2329 static void dispc_vp_set_gamma(struct dispc_device *dispc,
2330 			       u32 hw_videoport,
2331 			       const struct drm_color_lut *lut,
2332 			       unsigned int length)
2333 {
2334 	u32 *table = dispc->vp_data[hw_videoport].gamma_table;
2335 	u32 hwlen = dispc->feat->vp_feat.color.gamma_size;
2336 	u32 hwbits;
2337 	unsigned int i;
2338 
2339 	dev_dbg(dispc->dev, "%s: hw_videoport %d, lut len %u, hw len %u\n",
2340 		__func__, hw_videoport, length, hwlen);
2341 
2342 	if (dispc->feat->vp_feat.color.gamma_type == TIDSS_GAMMA_10BIT)
2343 		hwbits = 10;
2344 	else
2345 		hwbits = 8;
2346 
2347 	if (!lut || length < 2) {
2348 		lut = dispc_vp_gamma_default_lut;
2349 		length = ARRAY_SIZE(dispc_vp_gamma_default_lut);
2350 	}
2351 
2352 	for (i = 0; i < length - 1; ++i) {
2353 		unsigned int first = i * (hwlen - 1) / (length - 1);
2354 		unsigned int last = (i + 1) * (hwlen - 1) / (length - 1);
2355 		unsigned int w = last - first;
2356 		u16 r, g, b;
2357 		unsigned int j;
2358 
2359 		if (w == 0)
2360 			continue;
2361 
2362 		for (j = 0; j <= w; j++) {
2363 			r = (lut[i].red * (w - j) + lut[i + 1].red * j) / w;
2364 			g = (lut[i].green * (w - j) + lut[i + 1].green * j) / w;
2365 			b = (lut[i].blue * (w - j) + lut[i + 1].blue * j) / w;
2366 
2367 			r >>= 16 - hwbits;
2368 			g >>= 16 - hwbits;
2369 			b >>= 16 - hwbits;
2370 
2371 			table[first + j] = (r << (hwbits * 2)) |
2372 				(g << hwbits) | b;
2373 		}
2374 	}
2375 
2376 	dispc_vp_write_gamma_table(dispc, hw_videoport);
2377 }
2378 
2379 static s16 dispc_S31_32_to_s2_8(s64 coef)
2380 {
2381 	u64 sign_bit = 1ULL << 63;
2382 	u64 cbits = (u64)coef;
2383 	s16 ret;
2384 
2385 	if (cbits & sign_bit)
2386 		ret = -clamp_val(((cbits & ~sign_bit) >> 24), 0, 0x200);
2387 	else
2388 		ret = clamp_val(((cbits & ~sign_bit) >> 24), 0, 0x1FF);
2389 
2390 	return ret;
2391 }
2392 
2393 static void dispc_k2g_cpr_from_ctm(const struct drm_color_ctm *ctm,
2394 				   struct dispc_csc_coef *cpr)
2395 {
2396 	memset(cpr, 0, sizeof(*cpr));
2397 
2398 	cpr->to_regval = dispc_csc_cpr_regval;
2399 	cpr->m[CSC_RR] = dispc_S31_32_to_s2_8(ctm->matrix[0]);
2400 	cpr->m[CSC_RG] = dispc_S31_32_to_s2_8(ctm->matrix[1]);
2401 	cpr->m[CSC_RB] = dispc_S31_32_to_s2_8(ctm->matrix[2]);
2402 	cpr->m[CSC_GR] = dispc_S31_32_to_s2_8(ctm->matrix[3]);
2403 	cpr->m[CSC_GG] = dispc_S31_32_to_s2_8(ctm->matrix[4]);
2404 	cpr->m[CSC_GB] = dispc_S31_32_to_s2_8(ctm->matrix[5]);
2405 	cpr->m[CSC_BR] = dispc_S31_32_to_s2_8(ctm->matrix[6]);
2406 	cpr->m[CSC_BG] = dispc_S31_32_to_s2_8(ctm->matrix[7]);
2407 	cpr->m[CSC_BB] = dispc_S31_32_to_s2_8(ctm->matrix[8]);
2408 }
2409 
2410 #define CVAL(xR, xG, xB) (FLD_VAL(xR, 9, 0) | FLD_VAL(xG, 20, 11) |	\
2411 			  FLD_VAL(xB, 31, 22))
2412 
2413 static void dispc_k2g_vp_csc_cpr_regval(const struct dispc_csc_coef *csc,
2414 					u32 *regval)
2415 {
2416 	regval[0] = CVAL(csc->m[CSC_BB], csc->m[CSC_BG], csc->m[CSC_BR]);
2417 	regval[1] = CVAL(csc->m[CSC_GB], csc->m[CSC_GG], csc->m[CSC_GR]);
2418 	regval[2] = CVAL(csc->m[CSC_RB], csc->m[CSC_RG], csc->m[CSC_RR]);
2419 }
2420 
2421 #undef CVAL
2422 
2423 static void dispc_k2g_vp_write_csc(struct dispc_device *dispc, u32 hw_videoport,
2424 				   const struct dispc_csc_coef *csc)
2425 {
2426 	static const u16 dispc_vp_cpr_coef_reg[] = {
2427 		DISPC_VP_CSC_COEF0, DISPC_VP_CSC_COEF1, DISPC_VP_CSC_COEF2,
2428 		/* K2G CPR is packed to three registers. */
2429 	};
2430 	u32 regval[DISPC_CSC_REGVAL_LEN];
2431 	unsigned int i;
2432 
2433 	dispc_k2g_vp_csc_cpr_regval(csc, regval);
2434 
2435 	for (i = 0; i < ARRAY_SIZE(dispc_vp_cpr_coef_reg); i++)
2436 		dispc_vp_write(dispc, hw_videoport, dispc_vp_cpr_coef_reg[i],
2437 			       regval[i]);
2438 }
2439 
2440 static void dispc_k2g_vp_set_ctm(struct dispc_device *dispc, u32 hw_videoport,
2441 				 struct drm_color_ctm *ctm)
2442 {
2443 	u32 cprenable = 0;
2444 
2445 	if (ctm) {
2446 		struct dispc_csc_coef cpr;
2447 
2448 		dispc_k2g_cpr_from_ctm(ctm, &cpr);
2449 		dispc_k2g_vp_write_csc(dispc, hw_videoport, &cpr);
2450 		cprenable = 1;
2451 	}
2452 
2453 	VP_REG_FLD_MOD(dispc, hw_videoport, DISPC_VP_CONFIG,
2454 		       cprenable, 15, 15);
2455 }
2456 
2457 static s16 dispc_S31_32_to_s3_8(s64 coef)
2458 {
2459 	u64 sign_bit = 1ULL << 63;
2460 	u64 cbits = (u64)coef;
2461 	s16 ret;
2462 
2463 	if (cbits & sign_bit)
2464 		ret = -clamp_val(((cbits & ~sign_bit) >> 24), 0, 0x400);
2465 	else
2466 		ret = clamp_val(((cbits & ~sign_bit) >> 24), 0, 0x3FF);
2467 
2468 	return ret;
2469 }
2470 
2471 static void dispc_csc_from_ctm(const struct drm_color_ctm *ctm,
2472 			       struct dispc_csc_coef *cpr)
2473 {
2474 	memset(cpr, 0, sizeof(*cpr));
2475 
2476 	cpr->to_regval = dispc_csc_cpr_regval;
2477 	cpr->m[CSC_RR] = dispc_S31_32_to_s3_8(ctm->matrix[0]);
2478 	cpr->m[CSC_RG] = dispc_S31_32_to_s3_8(ctm->matrix[1]);
2479 	cpr->m[CSC_RB] = dispc_S31_32_to_s3_8(ctm->matrix[2]);
2480 	cpr->m[CSC_GR] = dispc_S31_32_to_s3_8(ctm->matrix[3]);
2481 	cpr->m[CSC_GG] = dispc_S31_32_to_s3_8(ctm->matrix[4]);
2482 	cpr->m[CSC_GB] = dispc_S31_32_to_s3_8(ctm->matrix[5]);
2483 	cpr->m[CSC_BR] = dispc_S31_32_to_s3_8(ctm->matrix[6]);
2484 	cpr->m[CSC_BG] = dispc_S31_32_to_s3_8(ctm->matrix[7]);
2485 	cpr->m[CSC_BB] = dispc_S31_32_to_s3_8(ctm->matrix[8]);
2486 }
2487 
2488 static void dispc_k3_vp_write_csc(struct dispc_device *dispc, u32 hw_videoport,
2489 				  const struct dispc_csc_coef *csc)
2490 {
2491 	static const u16 dispc_vp_csc_coef_reg[DISPC_CSC_REGVAL_LEN] = {
2492 		DISPC_VP_CSC_COEF0, DISPC_VP_CSC_COEF1, DISPC_VP_CSC_COEF2,
2493 		DISPC_VP_CSC_COEF3, DISPC_VP_CSC_COEF4, DISPC_VP_CSC_COEF5,
2494 		DISPC_VP_CSC_COEF6, DISPC_VP_CSC_COEF7,
2495 	};
2496 	u32 regval[DISPC_CSC_REGVAL_LEN];
2497 	unsigned int i;
2498 
2499 	csc->to_regval(csc, regval);
2500 
2501 	for (i = 0; i < ARRAY_SIZE(regval); i++)
2502 		dispc_vp_write(dispc, hw_videoport, dispc_vp_csc_coef_reg[i],
2503 			       regval[i]);
2504 }
2505 
2506 static void dispc_k3_vp_set_ctm(struct dispc_device *dispc, u32 hw_videoport,
2507 				struct drm_color_ctm *ctm)
2508 {
2509 	u32 colorconvenable = 0;
2510 
2511 	if (ctm) {
2512 		struct dispc_csc_coef csc;
2513 
2514 		dispc_csc_from_ctm(ctm, &csc);
2515 		dispc_k3_vp_write_csc(dispc, hw_videoport, &csc);
2516 		colorconvenable = 1;
2517 	}
2518 
2519 	VP_REG_FLD_MOD(dispc, hw_videoport, DISPC_VP_CONFIG,
2520 		       colorconvenable, 24, 24);
2521 }
2522 
2523 static void dispc_vp_set_color_mgmt(struct dispc_device *dispc,
2524 				    u32 hw_videoport,
2525 				    const struct drm_crtc_state *state,
2526 				    bool newmodeset)
2527 {
2528 	struct drm_color_lut *lut = NULL;
2529 	struct drm_color_ctm *ctm = NULL;
2530 	unsigned int length = 0;
2531 
2532 	if (!(state->color_mgmt_changed || newmodeset))
2533 		return;
2534 
2535 	if (state->gamma_lut) {
2536 		lut = (struct drm_color_lut *)state->gamma_lut->data;
2537 		length = state->gamma_lut->length / sizeof(*lut);
2538 	}
2539 
2540 	dispc_vp_set_gamma(dispc, hw_videoport, lut, length);
2541 
2542 	if (state->ctm)
2543 		ctm = (struct drm_color_ctm *)state->ctm->data;
2544 
2545 	if (dispc->feat->subrev == DISPC_K2G)
2546 		dispc_k2g_vp_set_ctm(dispc, hw_videoport, ctm);
2547 	else
2548 		dispc_k3_vp_set_ctm(dispc, hw_videoport, ctm);
2549 }
2550 
2551 void dispc_vp_setup(struct dispc_device *dispc, u32 hw_videoport,
2552 		    const struct drm_crtc_state *state, bool newmodeset)
2553 {
2554 	dispc_vp_set_default_color(dispc, hw_videoport, 0);
2555 	dispc_vp_set_color_mgmt(dispc, hw_videoport, state, newmodeset);
2556 }
2557 
2558 int dispc_runtime_suspend(struct dispc_device *dispc)
2559 {
2560 	dev_dbg(dispc->dev, "suspend\n");
2561 
2562 	dispc->is_enabled = false;
2563 
2564 	clk_disable_unprepare(dispc->fclk);
2565 
2566 	return 0;
2567 }
2568 
2569 int dispc_runtime_resume(struct dispc_device *dispc)
2570 {
2571 	dev_dbg(dispc->dev, "resume\n");
2572 
2573 	clk_prepare_enable(dispc->fclk);
2574 
2575 	if (REG_GET(dispc, DSS_SYSSTATUS, 0, 0) == 0)
2576 		dev_warn(dispc->dev, "DSS FUNC RESET not done!\n");
2577 
2578 	dev_dbg(dispc->dev, "OMAP DSS7 rev 0x%x\n",
2579 		dispc_read(dispc, DSS_REVISION));
2580 
2581 	dev_dbg(dispc->dev, "VP RESETDONE %d,%d,%d\n",
2582 		REG_GET(dispc, DSS_SYSSTATUS, 1, 1),
2583 		REG_GET(dispc, DSS_SYSSTATUS, 2, 2),
2584 		REG_GET(dispc, DSS_SYSSTATUS, 3, 3));
2585 
2586 	if (dispc->feat->subrev == DISPC_AM65X)
2587 		dev_dbg(dispc->dev, "OLDI RESETDONE %d,%d,%d\n",
2588 			REG_GET(dispc, DSS_SYSSTATUS, 5, 5),
2589 			REG_GET(dispc, DSS_SYSSTATUS, 6, 6),
2590 			REG_GET(dispc, DSS_SYSSTATUS, 7, 7));
2591 
2592 	dev_dbg(dispc->dev, "DISPC IDLE %d\n",
2593 		REG_GET(dispc, DSS_SYSSTATUS, 9, 9));
2594 
2595 	dispc_initial_config(dispc);
2596 
2597 	dispc->is_enabled = true;
2598 
2599 	tidss_irq_resume(dispc->tidss);
2600 
2601 	return 0;
2602 }
2603 
2604 void dispc_remove(struct tidss_device *tidss)
2605 {
2606 	dev_dbg(tidss->dev, "%s\n", __func__);
2607 
2608 	tidss->dispc = NULL;
2609 }
2610 
2611 static int dispc_iomap_resource(struct platform_device *pdev, const char *name,
2612 				void __iomem **base)
2613 {
2614 	void __iomem *b;
2615 
2616 	b = devm_platform_ioremap_resource_byname(pdev, name);
2617 	if (IS_ERR(b)) {
2618 		dev_err(&pdev->dev, "cannot ioremap resource '%s'\n", name);
2619 		return PTR_ERR(b);
2620 	}
2621 
2622 	*base = b;
2623 
2624 	return 0;
2625 }
2626 
2627 static int dispc_init_am65x_oldi_io_ctrl(struct device *dev,
2628 					 struct dispc_device *dispc)
2629 {
2630 	dispc->oldi_io_ctrl =
2631 		syscon_regmap_lookup_by_phandle(dev->of_node,
2632 						"ti,am65x-oldi-io-ctrl");
2633 	if (PTR_ERR(dispc->oldi_io_ctrl) == -ENODEV) {
2634 		dispc->oldi_io_ctrl = NULL;
2635 	} else if (IS_ERR(dispc->oldi_io_ctrl)) {
2636 		dev_err(dev, "%s: syscon_regmap_lookup_by_phandle failed %ld\n",
2637 			__func__, PTR_ERR(dispc->oldi_io_ctrl));
2638 		return PTR_ERR(dispc->oldi_io_ctrl);
2639 	}
2640 	return 0;
2641 }
2642 
2643 static void dispc_init_errata(struct dispc_device *dispc)
2644 {
2645 	static const struct soc_device_attribute am65x_sr10_soc_devices[] = {
2646 		{ .family = "AM65X", .revision = "SR1.0" },
2647 		{ /* sentinel */ }
2648 	};
2649 
2650 	if (soc_device_match(am65x_sr10_soc_devices)) {
2651 		dispc->errata.i2000 = true;
2652 		dev_info(dispc->dev, "WA for erratum i2000: YUV formats disabled\n");
2653 	}
2654 }
2655 
2656 static void dispc_softreset(struct dispc_device *dispc)
2657 {
2658 	u32 val;
2659 	int ret = 0;
2660 
2661 	/* Soft reset */
2662 	REG_FLD_MOD(dispc, DSS_SYSCONFIG, 1, 1, 1);
2663 	/* Wait for reset to complete */
2664 	ret = readl_poll_timeout(dispc->base_common + DSS_SYSSTATUS,
2665 				 val, val & 1, 100, 5000);
2666 	if (ret)
2667 		dev_warn(dispc->dev, "failed to reset dispc\n");
2668 }
2669 
2670 int dispc_init(struct tidss_device *tidss)
2671 {
2672 	struct device *dev = tidss->dev;
2673 	struct platform_device *pdev = to_platform_device(dev);
2674 	struct dispc_device *dispc;
2675 	const struct dispc_features *feat;
2676 	unsigned int i, num_fourccs;
2677 	int r = 0;
2678 
2679 	dev_dbg(dev, "%s\n", __func__);
2680 
2681 	feat = tidss->feat;
2682 
2683 	if (feat->subrev != DISPC_K2G) {
2684 		r = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
2685 		if (r)
2686 			dev_warn(dev, "cannot set DMA masks to 48-bit\n");
2687 	}
2688 
2689 	dispc = devm_kzalloc(dev, sizeof(*dispc), GFP_KERNEL);
2690 	if (!dispc)
2691 		return -ENOMEM;
2692 
2693 	dispc->tidss = tidss;
2694 	dispc->dev = dev;
2695 	dispc->feat = feat;
2696 
2697 	dispc_init_errata(dispc);
2698 
2699 	dispc->fourccs = devm_kcalloc(dev, ARRAY_SIZE(dispc_color_formats),
2700 				      sizeof(*dispc->fourccs), GFP_KERNEL);
2701 	if (!dispc->fourccs)
2702 		return -ENOMEM;
2703 
2704 	num_fourccs = 0;
2705 	for (i = 0; i < ARRAY_SIZE(dispc_color_formats); ++i) {
2706 		if (dispc->errata.i2000 &&
2707 		    dispc_fourcc_is_yuv(dispc_color_formats[i].fourcc)) {
2708 			continue;
2709 		}
2710 		dispc->fourccs[num_fourccs++] = dispc_color_formats[i].fourcc;
2711 	}
2712 
2713 	dispc->num_fourccs = num_fourccs;
2714 
2715 	dispc_common_regmap = dispc->feat->common_regs;
2716 
2717 	r = dispc_iomap_resource(pdev, dispc->feat->common,
2718 				 &dispc->base_common);
2719 	if (r)
2720 		return r;
2721 
2722 	for (i = 0; i < dispc->feat->num_planes; i++) {
2723 		r = dispc_iomap_resource(pdev, dispc->feat->vid_name[i],
2724 					 &dispc->base_vid[i]);
2725 		if (r)
2726 			return r;
2727 	}
2728 
2729 	/* K2G display controller does not support soft reset */
2730 	if (feat->subrev != DISPC_K2G)
2731 		dispc_softreset(dispc);
2732 
2733 	for (i = 0; i < dispc->feat->num_vps; i++) {
2734 		u32 gamma_size = dispc->feat->vp_feat.color.gamma_size;
2735 		u32 *gamma_table;
2736 		struct clk *clk;
2737 
2738 		r = dispc_iomap_resource(pdev, dispc->feat->ovr_name[i],
2739 					 &dispc->base_ovr[i]);
2740 		if (r)
2741 			return r;
2742 
2743 		r = dispc_iomap_resource(pdev, dispc->feat->vp_name[i],
2744 					 &dispc->base_vp[i]);
2745 		if (r)
2746 			return r;
2747 
2748 		clk = devm_clk_get(dev, dispc->feat->vpclk_name[i]);
2749 		if (IS_ERR(clk)) {
2750 			dev_err(dev, "%s: Failed to get clk %s:%ld\n", __func__,
2751 				dispc->feat->vpclk_name[i], PTR_ERR(clk));
2752 			return PTR_ERR(clk);
2753 		}
2754 		dispc->vp_clk[i] = clk;
2755 
2756 		gamma_table = devm_kmalloc_array(dev, gamma_size,
2757 						 sizeof(*gamma_table),
2758 						 GFP_KERNEL);
2759 		if (!gamma_table)
2760 			return -ENOMEM;
2761 		dispc->vp_data[i].gamma_table = gamma_table;
2762 	}
2763 
2764 	if (feat->subrev == DISPC_AM65X) {
2765 		r = dispc_init_am65x_oldi_io_ctrl(dev, dispc);
2766 		if (r)
2767 			return r;
2768 	}
2769 
2770 	dispc->fclk = devm_clk_get(dev, "fck");
2771 	if (IS_ERR(dispc->fclk)) {
2772 		dev_err(dev, "%s: Failed to get fclk: %ld\n",
2773 			__func__, PTR_ERR(dispc->fclk));
2774 		return PTR_ERR(dispc->fclk);
2775 	}
2776 	dev_dbg(dev, "DSS fclk %lu Hz\n", clk_get_rate(dispc->fclk));
2777 
2778 	of_property_read_u32(dispc->dev->of_node, "max-memory-bandwidth",
2779 			     &dispc->memory_bandwidth_limit);
2780 
2781 	tidss->dispc = dispc;
2782 
2783 	return 0;
2784 }
2785