1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * ispresizer.c
4  *
5  * TI OMAP3 ISP - Resizer module
6  *
7  * Copyright (C) 2010 Nokia Corporation
8  * Copyright (C) 2009 Texas Instruments, Inc
9  *
10  * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
11  *	     Sakari Ailus <sakari.ailus@iki.fi>
12  */
13 
14 #include <linux/device.h>
15 #include <linux/mm.h>
16 #include <linux/module.h>
17 
18 #include "isp.h"
19 #include "ispreg.h"
20 #include "ispresizer.h"
21 
22 /*
23  * Resizer Constants
24  */
25 #define MIN_RESIZE_VALUE		64
26 #define MID_RESIZE_VALUE		512
27 #define MAX_RESIZE_VALUE		1024
28 
29 #define MIN_IN_WIDTH			32
30 #define MIN_IN_HEIGHT			32
31 #define MAX_IN_WIDTH_MEMORY_MODE	4095
32 #define MAX_IN_WIDTH_ONTHEFLY_MODE_ES1	1280
33 #define MAX_IN_WIDTH_ONTHEFLY_MODE_ES2	4095
34 #define MAX_IN_HEIGHT			4095
35 
36 #define MIN_OUT_WIDTH			16
37 #define MIN_OUT_HEIGHT			2
38 #define MAX_OUT_HEIGHT			4095
39 
40 /*
41  * Resizer Use Constraints
42  * "TRM ES3.1, table 12-46"
43  */
44 #define MAX_4TAP_OUT_WIDTH_ES1		1280
45 #define MAX_7TAP_OUT_WIDTH_ES1		640
46 #define MAX_4TAP_OUT_WIDTH_ES2		3312
47 #define MAX_7TAP_OUT_WIDTH_ES2		1650
48 #define MAX_4TAP_OUT_WIDTH_3630		4096
49 #define MAX_7TAP_OUT_WIDTH_3630		2048
50 
51 /*
52  * Constants for ratio calculation
53  */
54 #define RESIZE_DIVISOR			256
55 #define DEFAULT_PHASE			1
56 
57 /*
58  * Default (and only) configuration of filter coefficients.
59  * 7-tap mode is for scale factors 0.25x to 0.5x.
60  * 4-tap mode is for scale factors 0.5x to 4.0x.
61  * There shouldn't be any reason to recalculate these, EVER.
62  */
63 static const struct isprsz_coef filter_coefs = {
64 	/* For 8-phase 4-tap horizontal filter: */
65 	{
66 		0x0000, 0x0100, 0x0000, 0x0000,
67 		0x03FA, 0x00F6, 0x0010, 0x0000,
68 		0x03F9, 0x00DB, 0x002C, 0x0000,
69 		0x03FB, 0x00B3, 0x0053, 0x03FF,
70 		0x03FD, 0x0082, 0x0084, 0x03FD,
71 		0x03FF, 0x0053, 0x00B3, 0x03FB,
72 		0x0000, 0x002C, 0x00DB, 0x03F9,
73 		0x0000, 0x0010, 0x00F6, 0x03FA
74 	},
75 	/* For 8-phase 4-tap vertical filter: */
76 	{
77 		0x0000, 0x0100, 0x0000, 0x0000,
78 		0x03FA, 0x00F6, 0x0010, 0x0000,
79 		0x03F9, 0x00DB, 0x002C, 0x0000,
80 		0x03FB, 0x00B3, 0x0053, 0x03FF,
81 		0x03FD, 0x0082, 0x0084, 0x03FD,
82 		0x03FF, 0x0053, 0x00B3, 0x03FB,
83 		0x0000, 0x002C, 0x00DB, 0x03F9,
84 		0x0000, 0x0010, 0x00F6, 0x03FA
85 	},
86 	/* For 4-phase 7-tap horizontal filter: */
87 	#define DUMMY 0
88 	{
89 		0x0004, 0x0023, 0x005A, 0x0058, 0x0023, 0x0004, 0x0000, DUMMY,
90 		0x0002, 0x0018, 0x004d, 0x0060, 0x0031, 0x0008, 0x0000, DUMMY,
91 		0x0001, 0x000f, 0x003f, 0x0062, 0x003f, 0x000f, 0x0001, DUMMY,
92 		0x0000, 0x0008, 0x0031, 0x0060, 0x004d, 0x0018, 0x0002, DUMMY
93 	},
94 	/* For 4-phase 7-tap vertical filter: */
95 	{
96 		0x0004, 0x0023, 0x005A, 0x0058, 0x0023, 0x0004, 0x0000, DUMMY,
97 		0x0002, 0x0018, 0x004d, 0x0060, 0x0031, 0x0008, 0x0000, DUMMY,
98 		0x0001, 0x000f, 0x003f, 0x0062, 0x003f, 0x000f, 0x0001, DUMMY,
99 		0x0000, 0x0008, 0x0031, 0x0060, 0x004d, 0x0018, 0x0002, DUMMY
100 	}
101 	/*
102 	 * The dummy padding is required in 7-tap mode because of how the
103 	 * registers are arranged physically.
104 	 */
105 	#undef DUMMY
106 };
107 
108 /*
109  * __resizer_get_format - helper function for getting resizer format
110  * @res   : pointer to resizer private structure
111  * @pad   : pad number
112  * @cfg: V4L2 subdev pad configuration
113  * @which : wanted subdev format
114  * return zero
115  */
116 static struct v4l2_mbus_framefmt *
__resizer_get_format(struct isp_res_device * res,struct v4l2_subdev_state * sd_state,unsigned int pad,enum v4l2_subdev_format_whence which)117 __resizer_get_format(struct isp_res_device *res,
118 		     struct v4l2_subdev_state *sd_state,
119 		     unsigned int pad, enum v4l2_subdev_format_whence which)
120 {
121 	if (which == V4L2_SUBDEV_FORMAT_TRY)
122 		return v4l2_subdev_get_try_format(&res->subdev, sd_state, pad);
123 	else
124 		return &res->formats[pad];
125 }
126 
127 /*
128  * __resizer_get_crop - helper function for getting resizer crop rectangle
129  * @res   : pointer to resizer private structure
130  * @cfg: V4L2 subdev pad configuration
131  * @which : wanted subdev crop rectangle
132  */
133 static struct v4l2_rect *
__resizer_get_crop(struct isp_res_device * res,struct v4l2_subdev_state * sd_state,enum v4l2_subdev_format_whence which)134 __resizer_get_crop(struct isp_res_device *res,
135 		   struct v4l2_subdev_state *sd_state,
136 		   enum v4l2_subdev_format_whence which)
137 {
138 	if (which == V4L2_SUBDEV_FORMAT_TRY)
139 		return v4l2_subdev_get_try_crop(&res->subdev, sd_state,
140 						RESZ_PAD_SINK);
141 	else
142 		return &res->crop.request;
143 }
144 
145 /*
146  * resizer_set_filters - Set resizer filters
147  * @res: Device context.
148  * @h_coeff: horizontal coefficient
149  * @v_coeff: vertical coefficient
150  * Return none
151  */
resizer_set_filters(struct isp_res_device * res,const u16 * h_coeff,const u16 * v_coeff)152 static void resizer_set_filters(struct isp_res_device *res, const u16 *h_coeff,
153 				const u16 *v_coeff)
154 {
155 	struct isp_device *isp = to_isp_device(res);
156 	u32 startaddr_h, startaddr_v, tmp_h, tmp_v;
157 	int i;
158 
159 	startaddr_h = ISPRSZ_HFILT10;
160 	startaddr_v = ISPRSZ_VFILT10;
161 
162 	for (i = 0; i < COEFF_CNT; i += 2) {
163 		tmp_h = h_coeff[i] |
164 			(h_coeff[i + 1] << ISPRSZ_HFILT_COEF1_SHIFT);
165 		tmp_v = v_coeff[i] |
166 			(v_coeff[i + 1] << ISPRSZ_VFILT_COEF1_SHIFT);
167 		isp_reg_writel(isp, tmp_h, OMAP3_ISP_IOMEM_RESZ, startaddr_h);
168 		isp_reg_writel(isp, tmp_v, OMAP3_ISP_IOMEM_RESZ, startaddr_v);
169 		startaddr_h += 4;
170 		startaddr_v += 4;
171 	}
172 }
173 
174 /*
175  * resizer_set_bilinear - Chrominance horizontal algorithm select
176  * @res: Device context.
177  * @type: Filtering interpolation type.
178  *
179  * Filtering that is same as luminance processing is
180  * intended only for downsampling, and bilinear interpolation
181  * is intended only for upsampling.
182  */
resizer_set_bilinear(struct isp_res_device * res,enum resizer_chroma_algo type)183 static void resizer_set_bilinear(struct isp_res_device *res,
184 				 enum resizer_chroma_algo type)
185 {
186 	struct isp_device *isp = to_isp_device(res);
187 
188 	if (type == RSZ_BILINEAR)
189 		isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
190 			    ISPRSZ_CNT_CBILIN);
191 	else
192 		isp_reg_clr(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
193 			    ISPRSZ_CNT_CBILIN);
194 }
195 
196 /*
197  * resizer_set_ycpos - Luminance and chrominance order
198  * @res: Device context.
199  * @pixelcode: pixel code.
200  */
resizer_set_ycpos(struct isp_res_device * res,u32 pixelcode)201 static void resizer_set_ycpos(struct isp_res_device *res, u32 pixelcode)
202 {
203 	struct isp_device *isp = to_isp_device(res);
204 
205 	switch (pixelcode) {
206 	case MEDIA_BUS_FMT_YUYV8_1X16:
207 		isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
208 			    ISPRSZ_CNT_YCPOS);
209 		break;
210 	case MEDIA_BUS_FMT_UYVY8_1X16:
211 		isp_reg_clr(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
212 			    ISPRSZ_CNT_YCPOS);
213 		break;
214 	default:
215 		return;
216 	}
217 }
218 
219 /*
220  * resizer_set_phase - Setup horizontal and vertical starting phase
221  * @res: Device context.
222  * @h_phase: horizontal phase parameters.
223  * @v_phase: vertical phase parameters.
224  *
225  * Horizontal and vertical phase range is 0 to 7
226  */
resizer_set_phase(struct isp_res_device * res,u32 h_phase,u32 v_phase)227 static void resizer_set_phase(struct isp_res_device *res, u32 h_phase,
228 			      u32 v_phase)
229 {
230 	struct isp_device *isp = to_isp_device(res);
231 	u32 rgval;
232 
233 	rgval = isp_reg_readl(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT) &
234 	      ~(ISPRSZ_CNT_HSTPH_MASK | ISPRSZ_CNT_VSTPH_MASK);
235 	rgval |= (h_phase << ISPRSZ_CNT_HSTPH_SHIFT) & ISPRSZ_CNT_HSTPH_MASK;
236 	rgval |= (v_phase << ISPRSZ_CNT_VSTPH_SHIFT) & ISPRSZ_CNT_VSTPH_MASK;
237 
238 	isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT);
239 }
240 
241 /*
242  * resizer_set_luma - Setup luminance enhancer parameters
243  * @res: Device context.
244  * @luma: Structure for luminance enhancer parameters.
245  *
246  * Algorithm select:
247  *  0x0: Disable
248  *  0x1: [-1  2 -1]/2 high-pass filter
249  *  0x2: [-1 -2  6 -2 -1]/4 high-pass filter
250  *
251  * Maximum gain:
252  *  The data is coded in U4Q4 representation.
253  *
254  * Slope:
255  *  The data is coded in U4Q4 representation.
256  *
257  * Coring offset:
258  *  The data is coded in U8Q0 representation.
259  *
260  * The new luminance value is computed as:
261  *  Y += HPF(Y) x max(GAIN, (HPF(Y) - CORE) x SLOP + 8) >> 4.
262  */
resizer_set_luma(struct isp_res_device * res,struct resizer_luma_yenh * luma)263 static void resizer_set_luma(struct isp_res_device *res,
264 			     struct resizer_luma_yenh *luma)
265 {
266 	struct isp_device *isp = to_isp_device(res);
267 	u32 rgval;
268 
269 	rgval  = (luma->algo << ISPRSZ_YENH_ALGO_SHIFT)
270 		  & ISPRSZ_YENH_ALGO_MASK;
271 	rgval |= (luma->gain << ISPRSZ_YENH_GAIN_SHIFT)
272 		  & ISPRSZ_YENH_GAIN_MASK;
273 	rgval |= (luma->slope << ISPRSZ_YENH_SLOP_SHIFT)
274 		  & ISPRSZ_YENH_SLOP_MASK;
275 	rgval |= (luma->core << ISPRSZ_YENH_CORE_SHIFT)
276 		  & ISPRSZ_YENH_CORE_MASK;
277 
278 	isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_YENH);
279 }
280 
281 /*
282  * resizer_set_source - Input source select
283  * @res: Device context.
284  * @source: Input source type
285  *
286  * If this field is set to RESIZER_INPUT_VP, the resizer input is fed from
287  * Preview/CCDC engine, otherwise from memory.
288  */
resizer_set_source(struct isp_res_device * res,enum resizer_input_entity source)289 static void resizer_set_source(struct isp_res_device *res,
290 			       enum resizer_input_entity source)
291 {
292 	struct isp_device *isp = to_isp_device(res);
293 
294 	if (source == RESIZER_INPUT_MEMORY)
295 		isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
296 			    ISPRSZ_CNT_INPSRC);
297 	else
298 		isp_reg_clr(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
299 			    ISPRSZ_CNT_INPSRC);
300 }
301 
302 /*
303  * resizer_set_ratio - Setup horizontal and vertical resizing value
304  * @res: Device context.
305  * @ratio: Structure for ratio parameters.
306  *
307  * Resizing range from 64 to 1024
308  */
resizer_set_ratio(struct isp_res_device * res,const struct resizer_ratio * ratio)309 static void resizer_set_ratio(struct isp_res_device *res,
310 			      const struct resizer_ratio *ratio)
311 {
312 	struct isp_device *isp = to_isp_device(res);
313 	const u16 *h_filter, *v_filter;
314 	u32 rgval;
315 
316 	rgval = isp_reg_readl(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT) &
317 			      ~(ISPRSZ_CNT_HRSZ_MASK | ISPRSZ_CNT_VRSZ_MASK);
318 	rgval |= ((ratio->horz - 1) << ISPRSZ_CNT_HRSZ_SHIFT)
319 		  & ISPRSZ_CNT_HRSZ_MASK;
320 	rgval |= ((ratio->vert - 1) << ISPRSZ_CNT_VRSZ_SHIFT)
321 		  & ISPRSZ_CNT_VRSZ_MASK;
322 	isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT);
323 
324 	/* prepare horizontal filter coefficients */
325 	if (ratio->horz > MID_RESIZE_VALUE)
326 		h_filter = &filter_coefs.h_filter_coef_7tap[0];
327 	else
328 		h_filter = &filter_coefs.h_filter_coef_4tap[0];
329 
330 	/* prepare vertical filter coefficients */
331 	if (ratio->vert > MID_RESIZE_VALUE)
332 		v_filter = &filter_coefs.v_filter_coef_7tap[0];
333 	else
334 		v_filter = &filter_coefs.v_filter_coef_4tap[0];
335 
336 	resizer_set_filters(res, h_filter, v_filter);
337 }
338 
339 /*
340  * resizer_set_dst_size - Setup the output height and width
341  * @res: Device context.
342  * @width: Output width.
343  * @height: Output height.
344  *
345  * Width :
346  *  The value must be EVEN.
347  *
348  * Height:
349  *  The number of bytes written to SDRAM must be
350  *  a multiple of 16-bytes if the vertical resizing factor
351  *  is greater than 1x (upsizing)
352  */
resizer_set_output_size(struct isp_res_device * res,u32 width,u32 height)353 static void resizer_set_output_size(struct isp_res_device *res,
354 				    u32 width, u32 height)
355 {
356 	struct isp_device *isp = to_isp_device(res);
357 	u32 rgval;
358 
359 	rgval  = (width << ISPRSZ_OUT_SIZE_HORZ_SHIFT)
360 		 & ISPRSZ_OUT_SIZE_HORZ_MASK;
361 	rgval |= (height << ISPRSZ_OUT_SIZE_VERT_SHIFT)
362 		 & ISPRSZ_OUT_SIZE_VERT_MASK;
363 	isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_OUT_SIZE);
364 }
365 
366 /*
367  * resizer_set_output_offset - Setup memory offset for the output lines.
368  * @res: Device context.
369  * @offset: Memory offset.
370  *
371  * The 5 LSBs are forced to be zeros by the hardware to align on a 32-byte
372  * boundary; the 5 LSBs are read-only. For optimal use of SDRAM bandwidth,
373  * the SDRAM line offset must be set on a 256-byte boundary
374  */
resizer_set_output_offset(struct isp_res_device * res,u32 offset)375 static void resizer_set_output_offset(struct isp_res_device *res, u32 offset)
376 {
377 	struct isp_device *isp = to_isp_device(res);
378 
379 	isp_reg_writel(isp, offset, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_SDR_OUTOFF);
380 }
381 
382 /*
383  * resizer_set_start - Setup vertical and horizontal start position
384  * @res: Device context.
385  * @left: Horizontal start position.
386  * @top: Vertical start position.
387  *
388  * Vertical start line:
389  *  This field makes sense only when the resizer obtains its input
390  *  from the preview engine/CCDC
391  *
392  * Horizontal start pixel:
393  *  Pixels are coded on 16 bits for YUV and 8 bits for color separate data.
394  *  When the resizer gets its input from SDRAM, this field must be set
395  *  to <= 15 for YUV 16-bit data and <= 31 for 8-bit color separate data
396  */
resizer_set_start(struct isp_res_device * res,u32 left,u32 top)397 static void resizer_set_start(struct isp_res_device *res, u32 left, u32 top)
398 {
399 	struct isp_device *isp = to_isp_device(res);
400 	u32 rgval;
401 
402 	rgval = (left << ISPRSZ_IN_START_HORZ_ST_SHIFT)
403 		& ISPRSZ_IN_START_HORZ_ST_MASK;
404 	rgval |= (top << ISPRSZ_IN_START_VERT_ST_SHIFT)
405 		 & ISPRSZ_IN_START_VERT_ST_MASK;
406 
407 	isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_IN_START);
408 }
409 
410 /*
411  * resizer_set_input_size - Setup the input size
412  * @res: Device context.
413  * @width: The range is 0 to 4095 pixels
414  * @height: The range is 0 to 4095 lines
415  */
resizer_set_input_size(struct isp_res_device * res,u32 width,u32 height)416 static void resizer_set_input_size(struct isp_res_device *res,
417 				   u32 width, u32 height)
418 {
419 	struct isp_device *isp = to_isp_device(res);
420 	u32 rgval;
421 
422 	rgval = (width << ISPRSZ_IN_SIZE_HORZ_SHIFT)
423 		& ISPRSZ_IN_SIZE_HORZ_MASK;
424 	rgval |= (height << ISPRSZ_IN_SIZE_VERT_SHIFT)
425 		 & ISPRSZ_IN_SIZE_VERT_MASK;
426 
427 	isp_reg_writel(isp, rgval, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_IN_SIZE);
428 }
429 
430 /*
431  * resizer_set_src_offs - Setup the memory offset for the input lines
432  * @res: Device context.
433  * @offset: Memory offset.
434  *
435  * The 5 LSBs are forced to be zeros by the hardware to align on a 32-byte
436  * boundary; the 5 LSBs are read-only. This field must be programmed to be
437  * 0x0 if the resizer input is from preview engine/CCDC.
438  */
resizer_set_input_offset(struct isp_res_device * res,u32 offset)439 static void resizer_set_input_offset(struct isp_res_device *res, u32 offset)
440 {
441 	struct isp_device *isp = to_isp_device(res);
442 
443 	isp_reg_writel(isp, offset, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_SDR_INOFF);
444 }
445 
446 /*
447  * resizer_set_intype - Input type select
448  * @res: Device context.
449  * @type: Pixel format type.
450  */
resizer_set_intype(struct isp_res_device * res,enum resizer_colors_type type)451 static void resizer_set_intype(struct isp_res_device *res,
452 			       enum resizer_colors_type type)
453 {
454 	struct isp_device *isp = to_isp_device(res);
455 
456 	if (type == RSZ_COLOR8)
457 		isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
458 			    ISPRSZ_CNT_INPTYP);
459 	else
460 		isp_reg_clr(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_CNT,
461 			    ISPRSZ_CNT_INPTYP);
462 }
463 
464 /*
465  * __resizer_set_inaddr - Helper function for set input address
466  * @res : pointer to resizer private data structure
467  * @addr: input address
468  * return none
469  */
__resizer_set_inaddr(struct isp_res_device * res,u32 addr)470 static void __resizer_set_inaddr(struct isp_res_device *res, u32 addr)
471 {
472 	struct isp_device *isp = to_isp_device(res);
473 
474 	isp_reg_writel(isp, addr, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_SDR_INADD);
475 }
476 
477 /*
478  * The data rate at the horizontal resizer output must not exceed half the
479  * functional clock or 100 MP/s, whichever is lower. According to the TRM
480  * there's no similar requirement for the vertical resizer output. However
481  * experience showed that vertical upscaling by 4 leads to SBL overflows (with
482  * data rates at the resizer output exceeding 300 MP/s). Limiting the resizer
483  * output data rate to the functional clock or 200 MP/s, whichever is lower,
484  * seems to get rid of SBL overflows.
485  *
486  * The maximum data rate at the output of the horizontal resizer can thus be
487  * computed with
488  *
489  * max intermediate rate <= L3 clock * input height / output height
490  * max intermediate rate <= L3 clock / 2
491  *
492  * The maximum data rate at the resizer input is then
493  *
494  * max input rate <= max intermediate rate * input width / output width
495  *
496  * where the input width and height are the resizer input crop rectangle size.
497  * The TRM doesn't clearly explain if that's a maximum instant data rate or a
498  * maximum average data rate.
499  */
omap3isp_resizer_max_rate(struct isp_res_device * res,unsigned int * max_rate)500 void omap3isp_resizer_max_rate(struct isp_res_device *res,
501 			       unsigned int *max_rate)
502 {
503 	struct isp_pipeline *pipe = to_isp_pipeline(&res->subdev.entity);
504 	const struct v4l2_mbus_framefmt *ofmt = &res->formats[RESZ_PAD_SOURCE];
505 	unsigned long limit = min(pipe->l3_ick, 200000000UL);
506 	unsigned long clock;
507 
508 	clock = div_u64((u64)limit * res->crop.active.height, ofmt->height);
509 	clock = min(clock, limit / 2);
510 	*max_rate = div_u64((u64)clock * res->crop.active.width, ofmt->width);
511 }
512 
513 /*
514  * When the resizer processes images from memory, the driver must slow down read
515  * requests on the input to at least comply with the internal data rate
516  * requirements. If the application real-time requirements can cope with slower
517  * processing, the resizer can be slowed down even more to put less pressure on
518  * the overall system.
519  *
520  * When the resizer processes images on the fly (either from the CCDC or the
521  * preview module), the same data rate requirements apply but they can't be
522  * enforced at the resizer level. The image input module (sensor, CCP2 or
523  * preview module) must not provide image data faster than the resizer can
524  * process.
525  *
526  * For live image pipelines, the data rate is set by the frame format, size and
527  * rate. The sensor output frame rate must not exceed the maximum resizer data
528  * rate.
529  *
530  * The resizer slows down read requests by inserting wait cycles in the SBL
531  * requests. The maximum number of 256-byte requests per second can be computed
532  * as (the data rate is multiplied by 2 to convert from pixels per second to
533  * bytes per second)
534  *
535  * request per second = data rate * 2 / 256
536  * cycles per request = cycles per second / requests per second
537  *
538  * The number of cycles per second is controlled by the L3 clock, leading to
539  *
540  * cycles per request = L3 frequency / 2 * 256 / data rate
541  */
resizer_adjust_bandwidth(struct isp_res_device * res)542 static void resizer_adjust_bandwidth(struct isp_res_device *res)
543 {
544 	struct isp_pipeline *pipe = to_isp_pipeline(&res->subdev.entity);
545 	struct isp_device *isp = to_isp_device(res);
546 	unsigned long l3_ick = pipe->l3_ick;
547 	struct v4l2_fract *timeperframe;
548 	unsigned int cycles_per_frame;
549 	unsigned int requests_per_frame;
550 	unsigned int cycles_per_request;
551 	unsigned int granularity;
552 	unsigned int minimum;
553 	unsigned int maximum;
554 	unsigned int value;
555 
556 	if (res->input != RESIZER_INPUT_MEMORY) {
557 		isp_reg_clr(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_SDR_REQ_EXP,
558 			    ISPSBL_SDR_REQ_RSZ_EXP_MASK);
559 		return;
560 	}
561 
562 	switch (isp->revision) {
563 	case ISP_REVISION_1_0:
564 	case ISP_REVISION_2_0:
565 	default:
566 		granularity = 1024;
567 		break;
568 
569 	case ISP_REVISION_15_0:
570 		granularity = 32;
571 		break;
572 	}
573 
574 	/* Compute the minimum number of cycles per request, based on the
575 	 * pipeline maximum data rate. This is an absolute lower bound if we
576 	 * don't want SBL overflows, so round the value up.
577 	 */
578 	cycles_per_request = div_u64((u64)l3_ick / 2 * 256 + pipe->max_rate - 1,
579 				     pipe->max_rate);
580 	minimum = DIV_ROUND_UP(cycles_per_request, granularity);
581 
582 	/* Compute the maximum number of cycles per request, based on the
583 	 * requested frame rate. This is a soft upper bound to achieve a frame
584 	 * rate equal or higher than the requested value, so round the value
585 	 * down.
586 	 */
587 	timeperframe = &pipe->max_timeperframe;
588 
589 	requests_per_frame = DIV_ROUND_UP(res->crop.active.width * 2, 256)
590 			   * res->crop.active.height;
591 	cycles_per_frame = div_u64((u64)l3_ick * timeperframe->numerator,
592 				   timeperframe->denominator);
593 	cycles_per_request = cycles_per_frame / requests_per_frame;
594 
595 	maximum = cycles_per_request / granularity;
596 
597 	value = max(minimum, maximum);
598 
599 	dev_dbg(isp->dev, "%s: cycles per request = %u\n", __func__, value);
600 	isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_SDR_REQ_EXP,
601 			ISPSBL_SDR_REQ_RSZ_EXP_MASK,
602 			value << ISPSBL_SDR_REQ_RSZ_EXP_SHIFT);
603 }
604 
605 /*
606  * omap3isp_resizer_busy - Checks if ISP resizer is busy.
607  *
608  * Returns busy field from ISPRSZ_PCR register.
609  */
omap3isp_resizer_busy(struct isp_res_device * res)610 int omap3isp_resizer_busy(struct isp_res_device *res)
611 {
612 	struct isp_device *isp = to_isp_device(res);
613 
614 	return isp_reg_readl(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_PCR) &
615 			     ISPRSZ_PCR_BUSY;
616 }
617 
618 /*
619  * resizer_set_inaddr - Sets the memory address of the input frame.
620  * @addr: 32bit memory address aligned on 32byte boundary.
621  */
resizer_set_inaddr(struct isp_res_device * res,u32 addr)622 static void resizer_set_inaddr(struct isp_res_device *res, u32 addr)
623 {
624 	res->addr_base = addr;
625 
626 	/* This will handle crop settings in stream off state */
627 	if (res->crop_offset)
628 		addr += res->crop_offset & ~0x1f;
629 
630 	__resizer_set_inaddr(res, addr);
631 }
632 
633 /*
634  * Configures the memory address to which the output frame is written.
635  * @addr: 32bit memory address aligned on 32byte boundary.
636  * Note: For SBL efficiency reasons the address should be on a 256-byte
637  * boundary.
638  */
resizer_set_outaddr(struct isp_res_device * res,u32 addr)639 static void resizer_set_outaddr(struct isp_res_device *res, u32 addr)
640 {
641 	struct isp_device *isp = to_isp_device(res);
642 
643 	/*
644 	 * Set output address. This needs to be in its own function
645 	 * because it changes often.
646 	 */
647 	isp_reg_writel(isp, addr << ISPRSZ_SDR_OUTADD_ADDR_SHIFT,
648 		       OMAP3_ISP_IOMEM_RESZ, ISPRSZ_SDR_OUTADD);
649 }
650 
651 /*
652  * resizer_print_status - Prints the values of the resizer module registers.
653  */
654 #define RSZ_PRINT_REGISTER(isp, name)\
655 	dev_dbg(isp->dev, "###RSZ " #name "=0x%08x\n", \
656 		isp_reg_readl(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_##name))
657 
resizer_print_status(struct isp_res_device * res)658 static void resizer_print_status(struct isp_res_device *res)
659 {
660 	struct isp_device *isp = to_isp_device(res);
661 
662 	dev_dbg(isp->dev, "-------------Resizer Register dump----------\n");
663 
664 	RSZ_PRINT_REGISTER(isp, PCR);
665 	RSZ_PRINT_REGISTER(isp, CNT);
666 	RSZ_PRINT_REGISTER(isp, OUT_SIZE);
667 	RSZ_PRINT_REGISTER(isp, IN_START);
668 	RSZ_PRINT_REGISTER(isp, IN_SIZE);
669 	RSZ_PRINT_REGISTER(isp, SDR_INADD);
670 	RSZ_PRINT_REGISTER(isp, SDR_INOFF);
671 	RSZ_PRINT_REGISTER(isp, SDR_OUTADD);
672 	RSZ_PRINT_REGISTER(isp, SDR_OUTOFF);
673 	RSZ_PRINT_REGISTER(isp, YENH);
674 
675 	dev_dbg(isp->dev, "--------------------------------------------\n");
676 }
677 
678 /*
679  * resizer_calc_ratios - Helper function for calculating resizer ratios
680  * @res: pointer to resizer private data structure
681  * @input: input frame size
682  * @output: output frame size
683  * @ratio : return calculated ratios
684  * return none
685  *
686  * The resizer uses a polyphase sample rate converter. The upsampling filter
687  * has a fixed number of phases that depend on the resizing ratio. As the ratio
688  * computation depends on the number of phases, we need to compute a first
689  * approximation and then refine it.
690  *
691  * The input/output/ratio relationship is given by the OMAP34xx TRM:
692  *
693  * - 8-phase, 4-tap mode (RSZ = 64 ~ 512)
694  *	iw = (32 * sph + (ow - 1) * hrsz + 16) >> 8 + 7
695  *	ih = (32 * spv + (oh - 1) * vrsz + 16) >> 8 + 4
696  * - 4-phase, 7-tap mode (RSZ = 513 ~ 1024)
697  *	iw = (64 * sph + (ow - 1) * hrsz + 32) >> 8 + 7
698  *	ih = (64 * spv + (oh - 1) * vrsz + 32) >> 8 + 7
699  *
700  * iw and ih are the input width and height after cropping. Those equations need
701  * to be satisfied exactly for the resizer to work correctly.
702  *
703  * The equations can't be easily reverted, as the >> 8 operation is not linear.
704  * In addition, not all input sizes can be achieved for a given output size. To
705  * get the highest input size lower than or equal to the requested input size,
706  * we need to compute the highest resizing ratio that satisfies the following
707  * inequality (taking the 4-tap mode width equation as an example)
708  *
709  *	iw >= (32 * sph + (ow - 1) * hrsz + 16) >> 8 - 7
710  *
711  * (where iw is the requested input width) which can be rewritten as
712  *
713  *	  iw - 7            >= (32 * sph + (ow - 1) * hrsz + 16) >> 8
714  *	 (iw - 7) << 8      >=  32 * sph + (ow - 1) * hrsz + 16 - b
715  *	((iw - 7) << 8) + b >=  32 * sph + (ow - 1) * hrsz + 16
716  *
717  * where b is the value of the 8 least significant bits of the right hand side
718  * expression of the last inequality. The highest resizing ratio value will be
719  * achieved when b is equal to its maximum value of 255. That resizing ratio
720  * value will still satisfy the original inequality, as b will disappear when
721  * the expression will be shifted right by 8.
722  *
723  * The reverted equations thus become
724  *
725  * - 8-phase, 4-tap mode
726  *	hrsz = ((iw - 7) * 256 + 255 - 16 - 32 * sph) / (ow - 1)
727  *	vrsz = ((ih - 4) * 256 + 255 - 16 - 32 * spv) / (oh - 1)
728  * - 4-phase, 7-tap mode
729  *	hrsz = ((iw - 7) * 256 + 255 - 32 - 64 * sph) / (ow - 1)
730  *	vrsz = ((ih - 7) * 256 + 255 - 32 - 64 * spv) / (oh - 1)
731  *
732  * The ratios are integer values, and are rounded down to ensure that the
733  * cropped input size is not bigger than the uncropped input size.
734  *
735  * As the number of phases/taps, used to select the correct equations to compute
736  * the ratio, depends on the ratio, we start with the 4-tap mode equations to
737  * compute an approximation of the ratio, and switch to the 7-tap mode equations
738  * if the approximation is higher than the ratio threshold.
739  *
740  * As the 7-tap mode equations will return a ratio smaller than or equal to the
741  * 4-tap mode equations, the resulting ratio could become lower than or equal to
742  * the ratio threshold. This 'equations loop' isn't an issue as long as the
743  * correct equations are used to compute the final input size. Starting with the
744  * 4-tap mode equations ensure that, in case of values resulting in a 'ratio
745  * loop', the smallest of the ratio values will be used, never exceeding the
746  * requested input size.
747  *
748  * We first clamp the output size according to the hardware capability to avoid
749  * auto-cropping the input more than required to satisfy the TRM equations. The
750  * minimum output size is achieved with a scaling factor of 1024. It is thus
751  * computed using the 7-tap equations.
752  *
753  *	min ow = ((iw - 7) * 256 - 32 - 64 * sph) / 1024 + 1
754  *	min oh = ((ih - 7) * 256 - 32 - 64 * spv) / 1024 + 1
755  *
756  * Similarly, the maximum output size is achieved with a scaling factor of 64
757  * and computed using the 4-tap equations.
758  *
759  *	max ow = ((iw - 7) * 256 + 255 - 16 - 32 * sph) / 64 + 1
760  *	max oh = ((ih - 4) * 256 + 255 - 16 - 32 * spv) / 64 + 1
761  *
762  * The additional +255 term compensates for the round down operation performed
763  * by the TRM equations when shifting the value right by 8 bits.
764  *
765  * We then compute and clamp the ratios (x1/4 ~ x4). Clamping the output size to
766  * the maximum value guarantees that the ratio value will never be smaller than
767  * the minimum, but it could still slightly exceed the maximum. Clamping the
768  * ratio will thus result in a resizing factor slightly larger than the
769  * requested value.
770  *
771  * To accommodate that, and make sure the TRM equations are satisfied exactly, we
772  * compute the input crop rectangle as the last step.
773  *
774  * As if the situation wasn't complex enough, the maximum output width depends
775  * on the vertical resizing ratio.  Fortunately, the output height doesn't
776  * depend on the horizontal resizing ratio. We can then start by computing the
777  * output height and the vertical ratio, and then move to computing the output
778  * width and the horizontal ratio.
779  */
resizer_calc_ratios(struct isp_res_device * res,struct v4l2_rect * input,struct v4l2_mbus_framefmt * output,struct resizer_ratio * ratio)780 static void resizer_calc_ratios(struct isp_res_device *res,
781 				struct v4l2_rect *input,
782 				struct v4l2_mbus_framefmt *output,
783 				struct resizer_ratio *ratio)
784 {
785 	struct isp_device *isp = to_isp_device(res);
786 	const unsigned int spv = DEFAULT_PHASE;
787 	const unsigned int sph = DEFAULT_PHASE;
788 	unsigned int upscaled_width;
789 	unsigned int upscaled_height;
790 	unsigned int min_width;
791 	unsigned int min_height;
792 	unsigned int max_width;
793 	unsigned int max_height;
794 	unsigned int width_alignment;
795 	unsigned int width;
796 	unsigned int height;
797 
798 	/*
799 	 * Clamp the output height based on the hardware capabilities and
800 	 * compute the vertical resizing ratio.
801 	 */
802 	min_height = ((input->height - 7) * 256 - 32 - 64 * spv) / 1024 + 1;
803 	min_height = max_t(unsigned int, min_height, MIN_OUT_HEIGHT);
804 	max_height = ((input->height - 4) * 256 + 255 - 16 - 32 * spv) / 64 + 1;
805 	max_height = min_t(unsigned int, max_height, MAX_OUT_HEIGHT);
806 	output->height = clamp(output->height, min_height, max_height);
807 
808 	ratio->vert = ((input->height - 4) * 256 + 255 - 16 - 32 * spv)
809 		    / (output->height - 1);
810 	if (ratio->vert > MID_RESIZE_VALUE)
811 		ratio->vert = ((input->height - 7) * 256 + 255 - 32 - 64 * spv)
812 			    / (output->height - 1);
813 	ratio->vert = clamp_t(unsigned int, ratio->vert,
814 			      MIN_RESIZE_VALUE, MAX_RESIZE_VALUE);
815 
816 	if (ratio->vert <= MID_RESIZE_VALUE) {
817 		upscaled_height = (output->height - 1) * ratio->vert
818 				+ 32 * spv + 16;
819 		height = (upscaled_height >> 8) + 4;
820 	} else {
821 		upscaled_height = (output->height - 1) * ratio->vert
822 				+ 64 * spv + 32;
823 		height = (upscaled_height >> 8) + 7;
824 	}
825 
826 	/*
827 	 * Compute the minimum and maximum output widths based on the hardware
828 	 * capabilities. The maximum depends on the vertical resizing ratio.
829 	 */
830 	min_width = ((input->width - 7) * 256 - 32 - 64 * sph) / 1024 + 1;
831 	min_width = max_t(unsigned int, min_width, MIN_OUT_WIDTH);
832 
833 	if (ratio->vert <= MID_RESIZE_VALUE) {
834 		switch (isp->revision) {
835 		case ISP_REVISION_1_0:
836 			max_width = MAX_4TAP_OUT_WIDTH_ES1;
837 			break;
838 
839 		case ISP_REVISION_2_0:
840 		default:
841 			max_width = MAX_4TAP_OUT_WIDTH_ES2;
842 			break;
843 
844 		case ISP_REVISION_15_0:
845 			max_width = MAX_4TAP_OUT_WIDTH_3630;
846 			break;
847 		}
848 	} else {
849 		switch (isp->revision) {
850 		case ISP_REVISION_1_0:
851 			max_width = MAX_7TAP_OUT_WIDTH_ES1;
852 			break;
853 
854 		case ISP_REVISION_2_0:
855 		default:
856 			max_width = MAX_7TAP_OUT_WIDTH_ES2;
857 			break;
858 
859 		case ISP_REVISION_15_0:
860 			max_width = MAX_7TAP_OUT_WIDTH_3630;
861 			break;
862 		}
863 	}
864 	max_width = min(((input->width - 7) * 256 + 255 - 16 - 32 * sph) / 64
865 			+ 1, max_width);
866 
867 	/*
868 	 * The output width must be even, and must be a multiple of 16 bytes
869 	 * when upscaling vertically. Clamp the output width to the valid range.
870 	 * Take the alignment into account (the maximum width in 7-tap mode on
871 	 * ES2 isn't a multiple of 8) and align the result up to make sure it
872 	 * won't be smaller than the minimum.
873 	 */
874 	width_alignment = ratio->vert < 256 ? 8 : 2;
875 	output->width = clamp(output->width, min_width,
876 			      max_width & ~(width_alignment - 1));
877 	output->width = ALIGN(output->width, width_alignment);
878 
879 	ratio->horz = ((input->width - 7) * 256 + 255 - 16 - 32 * sph)
880 		    / (output->width - 1);
881 	if (ratio->horz > MID_RESIZE_VALUE)
882 		ratio->horz = ((input->width - 7) * 256 + 255 - 32 - 64 * sph)
883 			    / (output->width - 1);
884 	ratio->horz = clamp_t(unsigned int, ratio->horz,
885 			      MIN_RESIZE_VALUE, MAX_RESIZE_VALUE);
886 
887 	if (ratio->horz <= MID_RESIZE_VALUE) {
888 		upscaled_width = (output->width - 1) * ratio->horz
889 			       + 32 * sph + 16;
890 		width = (upscaled_width >> 8) + 7;
891 	} else {
892 		upscaled_width = (output->width - 1) * ratio->horz
893 			       + 64 * sph + 32;
894 		width = (upscaled_width >> 8) + 7;
895 	}
896 
897 	/* Center the new crop rectangle. */
898 	input->left += (input->width - width) / 2;
899 	input->top += (input->height - height) / 2;
900 	input->width = width;
901 	input->height = height;
902 }
903 
904 /*
905  * resizer_set_crop_params - Setup hardware with cropping parameters
906  * @res : resizer private structure
907  * @input : format on sink pad
908  * @output : format on source pad
909  * return none
910  */
resizer_set_crop_params(struct isp_res_device * res,const struct v4l2_mbus_framefmt * input,const struct v4l2_mbus_framefmt * output)911 static void resizer_set_crop_params(struct isp_res_device *res,
912 				    const struct v4l2_mbus_framefmt *input,
913 				    const struct v4l2_mbus_framefmt *output)
914 {
915 	resizer_set_ratio(res, &res->ratio);
916 
917 	/* Set chrominance horizontal algorithm */
918 	if (res->ratio.horz >= RESIZE_DIVISOR)
919 		resizer_set_bilinear(res, RSZ_THE_SAME);
920 	else
921 		resizer_set_bilinear(res, RSZ_BILINEAR);
922 
923 	resizer_adjust_bandwidth(res);
924 
925 	if (res->input == RESIZER_INPUT_MEMORY) {
926 		/* Calculate additional offset for crop */
927 		res->crop_offset = (res->crop.active.top * input->width +
928 				    res->crop.active.left) * 2;
929 		/*
930 		 * Write lowest 4 bits of horizontal pixel offset (in pixels),
931 		 * vertical start must be 0.
932 		 */
933 		resizer_set_start(res, (res->crop_offset / 2) & 0xf, 0);
934 
935 		/*
936 		 * Set start (read) address for cropping, in bytes.
937 		 * Lowest 5 bits must be zero.
938 		 */
939 		__resizer_set_inaddr(res,
940 				res->addr_base + (res->crop_offset & ~0x1f));
941 	} else {
942 		/*
943 		 * Set vertical start line and horizontal starting pixel.
944 		 * If the input is from CCDC/PREV, horizontal start field is
945 		 * in bytes (twice number of pixels).
946 		 */
947 		resizer_set_start(res, res->crop.active.left * 2,
948 				  res->crop.active.top);
949 		/* Input address and offset must be 0 for preview/ccdc input */
950 		__resizer_set_inaddr(res, 0);
951 		resizer_set_input_offset(res, 0);
952 	}
953 
954 	/* Set the input size */
955 	resizer_set_input_size(res, res->crop.active.width,
956 			       res->crop.active.height);
957 }
958 
resizer_configure(struct isp_res_device * res)959 static void resizer_configure(struct isp_res_device *res)
960 {
961 	struct v4l2_mbus_framefmt *informat, *outformat;
962 	struct resizer_luma_yenh luma = {0, 0, 0, 0};
963 
964 	resizer_set_source(res, res->input);
965 
966 	informat = &res->formats[RESZ_PAD_SINK];
967 	outformat = &res->formats[RESZ_PAD_SOURCE];
968 
969 	/* RESZ_PAD_SINK */
970 	if (res->input == RESIZER_INPUT_VP)
971 		resizer_set_input_offset(res, 0);
972 	else
973 		resizer_set_input_offset(res, ALIGN(informat->width, 0x10) * 2);
974 
975 	/* YUV422 interleaved, default phase, no luma enhancement */
976 	resizer_set_intype(res, RSZ_YUV422);
977 	resizer_set_ycpos(res, informat->code);
978 	resizer_set_phase(res, DEFAULT_PHASE, DEFAULT_PHASE);
979 	resizer_set_luma(res, &luma);
980 
981 	/* RESZ_PAD_SOURCE */
982 	resizer_set_output_offset(res, ALIGN(outformat->width * 2, 32));
983 	resizer_set_output_size(res, outformat->width, outformat->height);
984 
985 	resizer_set_crop_params(res, informat, outformat);
986 }
987 
988 /* -----------------------------------------------------------------------------
989  * Interrupt handling
990  */
991 
resizer_enable_oneshot(struct isp_res_device * res)992 static void resizer_enable_oneshot(struct isp_res_device *res)
993 {
994 	struct isp_device *isp = to_isp_device(res);
995 
996 	isp_reg_set(isp, OMAP3_ISP_IOMEM_RESZ, ISPRSZ_PCR,
997 		    ISPRSZ_PCR_ENABLE | ISPRSZ_PCR_ONESHOT);
998 }
999 
omap3isp_resizer_isr_frame_sync(struct isp_res_device * res)1000 void omap3isp_resizer_isr_frame_sync(struct isp_res_device *res)
1001 {
1002 	/*
1003 	 * If ISP_VIDEO_DMAQUEUE_QUEUED is set, DMA queue had an underrun
1004 	 * condition, the module was paused and now we have a buffer queued
1005 	 * on the output again. Restart the pipeline if running in continuous
1006 	 * mode.
1007 	 */
1008 	if (res->state == ISP_PIPELINE_STREAM_CONTINUOUS &&
1009 	    res->video_out.dmaqueue_flags & ISP_VIDEO_DMAQUEUE_QUEUED) {
1010 		resizer_enable_oneshot(res);
1011 		isp_video_dmaqueue_flags_clr(&res->video_out);
1012 	}
1013 }
1014 
resizer_isr_buffer(struct isp_res_device * res)1015 static void resizer_isr_buffer(struct isp_res_device *res)
1016 {
1017 	struct isp_pipeline *pipe = to_isp_pipeline(&res->subdev.entity);
1018 	struct isp_buffer *buffer;
1019 	int restart = 0;
1020 
1021 	if (res->state == ISP_PIPELINE_STREAM_STOPPED)
1022 		return;
1023 
1024 	/* Complete the output buffer and, if reading from memory, the input
1025 	 * buffer.
1026 	 */
1027 	buffer = omap3isp_video_buffer_next(&res->video_out);
1028 	if (buffer != NULL) {
1029 		resizer_set_outaddr(res, buffer->dma);
1030 		restart = 1;
1031 	}
1032 
1033 	pipe->state |= ISP_PIPELINE_IDLE_OUTPUT;
1034 
1035 	if (res->input == RESIZER_INPUT_MEMORY) {
1036 		buffer = omap3isp_video_buffer_next(&res->video_in);
1037 		if (buffer != NULL)
1038 			resizer_set_inaddr(res, buffer->dma);
1039 		pipe->state |= ISP_PIPELINE_IDLE_INPUT;
1040 	}
1041 
1042 	if (res->state == ISP_PIPELINE_STREAM_SINGLESHOT) {
1043 		if (isp_pipeline_ready(pipe))
1044 			omap3isp_pipeline_set_stream(pipe,
1045 						ISP_PIPELINE_STREAM_SINGLESHOT);
1046 	} else {
1047 		/* If an underrun occurs, the video queue operation handler will
1048 		 * restart the resizer. Otherwise restart it immediately.
1049 		 */
1050 		if (restart)
1051 			resizer_enable_oneshot(res);
1052 	}
1053 }
1054 
1055 /*
1056  * omap3isp_resizer_isr - ISP resizer interrupt handler
1057  *
1058  * Manage the resizer video buffers and configure shadowed and busy-locked
1059  * registers.
1060  */
omap3isp_resizer_isr(struct isp_res_device * res)1061 void omap3isp_resizer_isr(struct isp_res_device *res)
1062 {
1063 	struct v4l2_mbus_framefmt *informat, *outformat;
1064 	unsigned long flags;
1065 
1066 	if (omap3isp_module_sync_is_stopping(&res->wait, &res->stopping))
1067 		return;
1068 
1069 	spin_lock_irqsave(&res->lock, flags);
1070 
1071 	if (res->applycrop) {
1072 		outformat = __resizer_get_format(res, NULL, RESZ_PAD_SOURCE,
1073 					      V4L2_SUBDEV_FORMAT_ACTIVE);
1074 		informat = __resizer_get_format(res, NULL, RESZ_PAD_SINK,
1075 					      V4L2_SUBDEV_FORMAT_ACTIVE);
1076 		resizer_set_crop_params(res, informat, outformat);
1077 		res->applycrop = 0;
1078 	}
1079 
1080 	spin_unlock_irqrestore(&res->lock, flags);
1081 
1082 	resizer_isr_buffer(res);
1083 }
1084 
1085 /* -----------------------------------------------------------------------------
1086  * ISP video operations
1087  */
1088 
resizer_video_queue(struct isp_video * video,struct isp_buffer * buffer)1089 static int resizer_video_queue(struct isp_video *video,
1090 			       struct isp_buffer *buffer)
1091 {
1092 	struct isp_res_device *res = &video->isp->isp_res;
1093 
1094 	if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1095 		resizer_set_inaddr(res, buffer->dma);
1096 
1097 	/*
1098 	 * We now have a buffer queued on the output. Despite what the
1099 	 * TRM says, the resizer can't be restarted immediately.
1100 	 * Enabling it in one shot mode in the middle of a frame (or at
1101 	 * least asynchronously to the frame) results in the output
1102 	 * being shifted randomly left/right and up/down, as if the
1103 	 * hardware didn't synchronize itself to the beginning of the
1104 	 * frame correctly.
1105 	 *
1106 	 * Restart the resizer on the next sync interrupt if running in
1107 	 * continuous mode or when starting the stream.
1108 	 */
1109 	if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1110 		resizer_set_outaddr(res, buffer->dma);
1111 
1112 	return 0;
1113 }
1114 
1115 static const struct isp_video_operations resizer_video_ops = {
1116 	.queue = resizer_video_queue,
1117 };
1118 
1119 /* -----------------------------------------------------------------------------
1120  * V4L2 subdev operations
1121  */
1122 
1123 /*
1124  * resizer_set_stream - Enable/Disable streaming on resizer subdev
1125  * @sd: ISP resizer V4L2 subdev
1126  * @enable: 1 == Enable, 0 == Disable
1127  *
1128  * The resizer hardware can't be enabled without a memory buffer to write to.
1129  * As the s_stream operation is called in response to a STREAMON call without
1130  * any buffer queued yet, just update the state field and return immediately.
1131  * The resizer will be enabled in resizer_video_queue().
1132  */
resizer_set_stream(struct v4l2_subdev * sd,int enable)1133 static int resizer_set_stream(struct v4l2_subdev *sd, int enable)
1134 {
1135 	struct isp_res_device *res = v4l2_get_subdevdata(sd);
1136 	struct isp_video *video_out = &res->video_out;
1137 	struct isp_device *isp = to_isp_device(res);
1138 	struct device *dev = to_device(res);
1139 
1140 	if (res->state == ISP_PIPELINE_STREAM_STOPPED) {
1141 		if (enable == ISP_PIPELINE_STREAM_STOPPED)
1142 			return 0;
1143 
1144 		omap3isp_subclk_enable(isp, OMAP3_ISP_SUBCLK_RESIZER);
1145 		resizer_configure(res);
1146 		resizer_print_status(res);
1147 	}
1148 
1149 	switch (enable) {
1150 	case ISP_PIPELINE_STREAM_CONTINUOUS:
1151 		omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_RESIZER_WRITE);
1152 		if (video_out->dmaqueue_flags & ISP_VIDEO_DMAQUEUE_QUEUED) {
1153 			resizer_enable_oneshot(res);
1154 			isp_video_dmaqueue_flags_clr(video_out);
1155 		}
1156 		break;
1157 
1158 	case ISP_PIPELINE_STREAM_SINGLESHOT:
1159 		if (res->input == RESIZER_INPUT_MEMORY)
1160 			omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_RESIZER_READ);
1161 		omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_RESIZER_WRITE);
1162 
1163 		resizer_enable_oneshot(res);
1164 		break;
1165 
1166 	case ISP_PIPELINE_STREAM_STOPPED:
1167 		if (omap3isp_module_sync_idle(&sd->entity, &res->wait,
1168 					      &res->stopping))
1169 			dev_dbg(dev, "%s: module stop timeout.\n", sd->name);
1170 		omap3isp_sbl_disable(isp, OMAP3_ISP_SBL_RESIZER_READ |
1171 				OMAP3_ISP_SBL_RESIZER_WRITE);
1172 		omap3isp_subclk_disable(isp, OMAP3_ISP_SUBCLK_RESIZER);
1173 		isp_video_dmaqueue_flags_clr(video_out);
1174 		break;
1175 	}
1176 
1177 	res->state = enable;
1178 	return 0;
1179 }
1180 
1181 /*
1182  * resizer_try_crop - mangles crop parameters.
1183  */
resizer_try_crop(const struct v4l2_mbus_framefmt * sink,const struct v4l2_mbus_framefmt * source,struct v4l2_rect * crop)1184 static void resizer_try_crop(const struct v4l2_mbus_framefmt *sink,
1185 			     const struct v4l2_mbus_framefmt *source,
1186 			     struct v4l2_rect *crop)
1187 {
1188 	const unsigned int spv = DEFAULT_PHASE;
1189 	const unsigned int sph = DEFAULT_PHASE;
1190 
1191 	/* Crop rectangle is constrained by the output size so that zoom ratio
1192 	 * cannot exceed +/-4.0.
1193 	 */
1194 	unsigned int min_width =
1195 		((32 * sph + (source->width - 1) * 64 + 16) >> 8) + 7;
1196 	unsigned int min_height =
1197 		((32 * spv + (source->height - 1) * 64 + 16) >> 8) + 4;
1198 	unsigned int max_width =
1199 		((64 * sph + (source->width - 1) * 1024 + 32) >> 8) + 7;
1200 	unsigned int max_height =
1201 		((64 * spv + (source->height - 1) * 1024 + 32) >> 8) + 7;
1202 
1203 	crop->width = clamp_t(u32, crop->width, min_width, max_width);
1204 	crop->height = clamp_t(u32, crop->height, min_height, max_height);
1205 
1206 	/* Crop can not go beyond of the input rectangle */
1207 	crop->left = clamp_t(u32, crop->left, 0, sink->width - MIN_IN_WIDTH);
1208 	crop->width = clamp_t(u32, crop->width, MIN_IN_WIDTH,
1209 			      sink->width - crop->left);
1210 	crop->top = clamp_t(u32, crop->top, 0, sink->height - MIN_IN_HEIGHT);
1211 	crop->height = clamp_t(u32, crop->height, MIN_IN_HEIGHT,
1212 			       sink->height - crop->top);
1213 }
1214 
1215 /*
1216  * resizer_get_selection - Retrieve a selection rectangle on a pad
1217  * @sd: ISP resizer V4L2 subdevice
1218  * @cfg: V4L2 subdev pad configuration
1219  * @sel: Selection rectangle
1220  *
1221  * The only supported rectangles are the crop rectangles on the sink pad.
1222  *
1223  * Return 0 on success or a negative error code otherwise.
1224  */
resizer_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)1225 static int resizer_get_selection(struct v4l2_subdev *sd,
1226 				 struct v4l2_subdev_state *sd_state,
1227 				 struct v4l2_subdev_selection *sel)
1228 {
1229 	struct isp_res_device *res = v4l2_get_subdevdata(sd);
1230 	struct v4l2_mbus_framefmt *format_source;
1231 	struct v4l2_mbus_framefmt *format_sink;
1232 	struct resizer_ratio ratio;
1233 
1234 	if (sel->pad != RESZ_PAD_SINK)
1235 		return -EINVAL;
1236 
1237 	format_sink = __resizer_get_format(res, sd_state, RESZ_PAD_SINK,
1238 					   sel->which);
1239 	format_source = __resizer_get_format(res, sd_state, RESZ_PAD_SOURCE,
1240 					     sel->which);
1241 
1242 	switch (sel->target) {
1243 	case V4L2_SEL_TGT_CROP_BOUNDS:
1244 		sel->r.left = 0;
1245 		sel->r.top = 0;
1246 		sel->r.width = INT_MAX;
1247 		sel->r.height = INT_MAX;
1248 
1249 		resizer_try_crop(format_sink, format_source, &sel->r);
1250 		resizer_calc_ratios(res, &sel->r, format_source, &ratio);
1251 		break;
1252 
1253 	case V4L2_SEL_TGT_CROP:
1254 		sel->r = *__resizer_get_crop(res, sd_state, sel->which);
1255 		resizer_calc_ratios(res, &sel->r, format_source, &ratio);
1256 		break;
1257 
1258 	default:
1259 		return -EINVAL;
1260 	}
1261 
1262 	return 0;
1263 }
1264 
1265 /*
1266  * resizer_set_selection - Set a selection rectangle on a pad
1267  * @sd: ISP resizer V4L2 subdevice
1268  * @cfg: V4L2 subdev pad configuration
1269  * @sel: Selection rectangle
1270  *
1271  * The only supported rectangle is the actual crop rectangle on the sink pad.
1272  *
1273  * FIXME: This function currently behaves as if the KEEP_CONFIG selection flag
1274  * was always set.
1275  *
1276  * Return 0 on success or a negative error code otherwise.
1277  */
resizer_set_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)1278 static int resizer_set_selection(struct v4l2_subdev *sd,
1279 				 struct v4l2_subdev_state *sd_state,
1280 				 struct v4l2_subdev_selection *sel)
1281 {
1282 	struct isp_res_device *res = v4l2_get_subdevdata(sd);
1283 	struct isp_device *isp = to_isp_device(res);
1284 	const struct v4l2_mbus_framefmt *format_sink;
1285 	struct v4l2_mbus_framefmt format_source;
1286 	struct resizer_ratio ratio;
1287 	unsigned long flags;
1288 
1289 	if (sel->target != V4L2_SEL_TGT_CROP ||
1290 	    sel->pad != RESZ_PAD_SINK)
1291 		return -EINVAL;
1292 
1293 	format_sink = __resizer_get_format(res, sd_state, RESZ_PAD_SINK,
1294 					   sel->which);
1295 	format_source = *__resizer_get_format(res, sd_state, RESZ_PAD_SOURCE,
1296 					      sel->which);
1297 
1298 	dev_dbg(isp->dev, "%s(%s): req %ux%u -> (%d,%d)/%ux%u -> %ux%u\n",
1299 		__func__, sel->which == V4L2_SUBDEV_FORMAT_TRY ? "try" : "act",
1300 		format_sink->width, format_sink->height,
1301 		sel->r.left, sel->r.top, sel->r.width, sel->r.height,
1302 		format_source.width, format_source.height);
1303 
1304 	/* Clamp the crop rectangle to the bounds, and then mangle it further to
1305 	 * fulfill the TRM equations. Store the clamped but otherwise unmangled
1306 	 * rectangle to avoid cropping the input multiple times: when an
1307 	 * application sets the output format, the current crop rectangle is
1308 	 * mangled during crop rectangle computation, which would lead to a new,
1309 	 * smaller input crop rectangle every time the output size is set if we
1310 	 * stored the mangled rectangle.
1311 	 */
1312 	resizer_try_crop(format_sink, &format_source, &sel->r);
1313 	*__resizer_get_crop(res, sd_state, sel->which) = sel->r;
1314 	resizer_calc_ratios(res, &sel->r, &format_source, &ratio);
1315 
1316 	dev_dbg(isp->dev, "%s(%s): got %ux%u -> (%d,%d)/%ux%u -> %ux%u\n",
1317 		__func__, sel->which == V4L2_SUBDEV_FORMAT_TRY ? "try" : "act",
1318 		format_sink->width, format_sink->height,
1319 		sel->r.left, sel->r.top, sel->r.width, sel->r.height,
1320 		format_source.width, format_source.height);
1321 
1322 	if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1323 		*__resizer_get_format(res, sd_state, RESZ_PAD_SOURCE,
1324 				      sel->which) =
1325 			format_source;
1326 		return 0;
1327 	}
1328 
1329 	/* Update the source format, resizing ratios and crop rectangle. If
1330 	 * streaming is on the IRQ handler will reprogram the resizer after the
1331 	 * current frame. We thus we need to protect against race conditions.
1332 	 */
1333 	spin_lock_irqsave(&res->lock, flags);
1334 
1335 	*__resizer_get_format(res, sd_state, RESZ_PAD_SOURCE, sel->which) =
1336 		format_source;
1337 
1338 	res->ratio = ratio;
1339 	res->crop.active = sel->r;
1340 
1341 	if (res->state != ISP_PIPELINE_STREAM_STOPPED)
1342 		res->applycrop = 1;
1343 
1344 	spin_unlock_irqrestore(&res->lock, flags);
1345 
1346 	return 0;
1347 }
1348 
1349 /* resizer pixel formats */
1350 static const unsigned int resizer_formats[] = {
1351 	MEDIA_BUS_FMT_UYVY8_1X16,
1352 	MEDIA_BUS_FMT_YUYV8_1X16,
1353 };
1354 
resizer_max_in_width(struct isp_res_device * res)1355 static unsigned int resizer_max_in_width(struct isp_res_device *res)
1356 {
1357 	struct isp_device *isp = to_isp_device(res);
1358 
1359 	if (res->input == RESIZER_INPUT_MEMORY) {
1360 		return MAX_IN_WIDTH_MEMORY_MODE;
1361 	} else {
1362 		if (isp->revision == ISP_REVISION_1_0)
1363 			return MAX_IN_WIDTH_ONTHEFLY_MODE_ES1;
1364 		else
1365 			return MAX_IN_WIDTH_ONTHEFLY_MODE_ES2;
1366 	}
1367 }
1368 
1369 /*
1370  * resizer_try_format - Handle try format by pad subdev method
1371  * @res   : ISP resizer device
1372  * @cfg: V4L2 subdev pad configuration
1373  * @pad   : pad num
1374  * @fmt   : pointer to v4l2 format structure
1375  * @which : wanted subdev format
1376  */
resizer_try_format(struct isp_res_device * res,struct v4l2_subdev_state * sd_state,unsigned int pad,struct v4l2_mbus_framefmt * fmt,enum v4l2_subdev_format_whence which)1377 static void resizer_try_format(struct isp_res_device *res,
1378 			       struct v4l2_subdev_state *sd_state,
1379 			       unsigned int pad,
1380 			       struct v4l2_mbus_framefmt *fmt,
1381 			       enum v4l2_subdev_format_whence which)
1382 {
1383 	struct v4l2_mbus_framefmt *format;
1384 	struct resizer_ratio ratio;
1385 	struct v4l2_rect crop;
1386 
1387 	switch (pad) {
1388 	case RESZ_PAD_SINK:
1389 		if (fmt->code != MEDIA_BUS_FMT_YUYV8_1X16 &&
1390 		    fmt->code != MEDIA_BUS_FMT_UYVY8_1X16)
1391 			fmt->code = MEDIA_BUS_FMT_YUYV8_1X16;
1392 
1393 		fmt->width = clamp_t(u32, fmt->width, MIN_IN_WIDTH,
1394 				     resizer_max_in_width(res));
1395 		fmt->height = clamp_t(u32, fmt->height, MIN_IN_HEIGHT,
1396 				      MAX_IN_HEIGHT);
1397 		break;
1398 
1399 	case RESZ_PAD_SOURCE:
1400 		format = __resizer_get_format(res, sd_state, RESZ_PAD_SINK,
1401 					      which);
1402 		fmt->code = format->code;
1403 
1404 		crop = *__resizer_get_crop(res, sd_state, which);
1405 		resizer_calc_ratios(res, &crop, fmt, &ratio);
1406 		break;
1407 	}
1408 
1409 	fmt->colorspace = V4L2_COLORSPACE_JPEG;
1410 	fmt->field = V4L2_FIELD_NONE;
1411 }
1412 
1413 /*
1414  * resizer_enum_mbus_code - Handle pixel format enumeration
1415  * @sd     : pointer to v4l2 subdev structure
1416  * @cfg: V4L2 subdev pad configuration
1417  * @code   : pointer to v4l2_subdev_mbus_code_enum structure
1418  * return -EINVAL or zero on success
1419  */
resizer_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)1420 static int resizer_enum_mbus_code(struct v4l2_subdev *sd,
1421 				  struct v4l2_subdev_state *sd_state,
1422 				  struct v4l2_subdev_mbus_code_enum *code)
1423 {
1424 	struct isp_res_device *res = v4l2_get_subdevdata(sd);
1425 	struct v4l2_mbus_framefmt *format;
1426 
1427 	if (code->pad == RESZ_PAD_SINK) {
1428 		if (code->index >= ARRAY_SIZE(resizer_formats))
1429 			return -EINVAL;
1430 
1431 		code->code = resizer_formats[code->index];
1432 	} else {
1433 		if (code->index != 0)
1434 			return -EINVAL;
1435 
1436 		format = __resizer_get_format(res, sd_state, RESZ_PAD_SINK,
1437 					      code->which);
1438 		code->code = format->code;
1439 	}
1440 
1441 	return 0;
1442 }
1443 
resizer_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_frame_size_enum * fse)1444 static int resizer_enum_frame_size(struct v4l2_subdev *sd,
1445 				   struct v4l2_subdev_state *sd_state,
1446 				   struct v4l2_subdev_frame_size_enum *fse)
1447 {
1448 	struct isp_res_device *res = v4l2_get_subdevdata(sd);
1449 	struct v4l2_mbus_framefmt format;
1450 
1451 	if (fse->index != 0)
1452 		return -EINVAL;
1453 
1454 	format.code = fse->code;
1455 	format.width = 1;
1456 	format.height = 1;
1457 	resizer_try_format(res, sd_state, fse->pad, &format, fse->which);
1458 	fse->min_width = format.width;
1459 	fse->min_height = format.height;
1460 
1461 	if (format.code != fse->code)
1462 		return -EINVAL;
1463 
1464 	format.code = fse->code;
1465 	format.width = -1;
1466 	format.height = -1;
1467 	resizer_try_format(res, sd_state, fse->pad, &format, fse->which);
1468 	fse->max_width = format.width;
1469 	fse->max_height = format.height;
1470 
1471 	return 0;
1472 }
1473 
1474 /*
1475  * resizer_get_format - Handle get format by pads subdev method
1476  * @sd    : pointer to v4l2 subdev structure
1477  * @cfg: V4L2 subdev pad configuration
1478  * @fmt   : pointer to v4l2 subdev format structure
1479  * return -EINVAL or zero on success
1480  */
resizer_get_format(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)1481 static int resizer_get_format(struct v4l2_subdev *sd,
1482 			      struct v4l2_subdev_state *sd_state,
1483 			      struct v4l2_subdev_format *fmt)
1484 {
1485 	struct isp_res_device *res = v4l2_get_subdevdata(sd);
1486 	struct v4l2_mbus_framefmt *format;
1487 
1488 	format = __resizer_get_format(res, sd_state, fmt->pad, fmt->which);
1489 	if (format == NULL)
1490 		return -EINVAL;
1491 
1492 	fmt->format = *format;
1493 	return 0;
1494 }
1495 
1496 /*
1497  * resizer_set_format - Handle set format by pads subdev method
1498  * @sd    : pointer to v4l2 subdev structure
1499  * @cfg: V4L2 subdev pad configuration
1500  * @fmt   : pointer to v4l2 subdev format structure
1501  * return -EINVAL or zero on success
1502  */
resizer_set_format(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)1503 static int resizer_set_format(struct v4l2_subdev *sd,
1504 			      struct v4l2_subdev_state *sd_state,
1505 			      struct v4l2_subdev_format *fmt)
1506 {
1507 	struct isp_res_device *res = v4l2_get_subdevdata(sd);
1508 	struct v4l2_mbus_framefmt *format;
1509 	struct v4l2_rect *crop;
1510 
1511 	format = __resizer_get_format(res, sd_state, fmt->pad, fmt->which);
1512 	if (format == NULL)
1513 		return -EINVAL;
1514 
1515 	resizer_try_format(res, sd_state, fmt->pad, &fmt->format, fmt->which);
1516 	*format = fmt->format;
1517 
1518 	if (fmt->pad == RESZ_PAD_SINK) {
1519 		/* reset crop rectangle */
1520 		crop = __resizer_get_crop(res, sd_state, fmt->which);
1521 		crop->left = 0;
1522 		crop->top = 0;
1523 		crop->width = fmt->format.width;
1524 		crop->height = fmt->format.height;
1525 
1526 		/* Propagate the format from sink to source */
1527 		format = __resizer_get_format(res, sd_state, RESZ_PAD_SOURCE,
1528 					      fmt->which);
1529 		*format = fmt->format;
1530 		resizer_try_format(res, sd_state, RESZ_PAD_SOURCE, format,
1531 				   fmt->which);
1532 	}
1533 
1534 	if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
1535 		/* Compute and store the active crop rectangle and resizer
1536 		 * ratios. format already points to the source pad active
1537 		 * format.
1538 		 */
1539 		res->crop.active = res->crop.request;
1540 		resizer_calc_ratios(res, &res->crop.active, format,
1541 				       &res->ratio);
1542 	}
1543 
1544 	return 0;
1545 }
1546 
resizer_link_validate(struct v4l2_subdev * sd,struct media_link * link,struct v4l2_subdev_format * source_fmt,struct v4l2_subdev_format * sink_fmt)1547 static int resizer_link_validate(struct v4l2_subdev *sd,
1548 				 struct media_link *link,
1549 				 struct v4l2_subdev_format *source_fmt,
1550 				 struct v4l2_subdev_format *sink_fmt)
1551 {
1552 	struct isp_res_device *res = v4l2_get_subdevdata(sd);
1553 	struct isp_pipeline *pipe = to_isp_pipeline(&sd->entity);
1554 
1555 	omap3isp_resizer_max_rate(res, &pipe->max_rate);
1556 
1557 	return v4l2_subdev_link_validate_default(sd, link,
1558 						 source_fmt, sink_fmt);
1559 }
1560 
1561 /*
1562  * resizer_init_formats - Initialize formats on all pads
1563  * @sd: ISP resizer V4L2 subdevice
1564  * @fh: V4L2 subdev file handle
1565  *
1566  * Initialize all pad formats with default values. If fh is not NULL, try
1567  * formats are initialized on the file handle. Otherwise active formats are
1568  * initialized on the device.
1569  */
resizer_init_formats(struct v4l2_subdev * sd,struct v4l2_subdev_fh * fh)1570 static int resizer_init_formats(struct v4l2_subdev *sd,
1571 				struct v4l2_subdev_fh *fh)
1572 {
1573 	struct v4l2_subdev_format format;
1574 
1575 	memset(&format, 0, sizeof(format));
1576 	format.pad = RESZ_PAD_SINK;
1577 	format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
1578 	format.format.code = MEDIA_BUS_FMT_YUYV8_1X16;
1579 	format.format.width = 4096;
1580 	format.format.height = 4096;
1581 	resizer_set_format(sd, fh ? fh->state : NULL, &format);
1582 
1583 	return 0;
1584 }
1585 
1586 /* subdev video operations */
1587 static const struct v4l2_subdev_video_ops resizer_v4l2_video_ops = {
1588 	.s_stream = resizer_set_stream,
1589 };
1590 
1591 /* subdev pad operations */
1592 static const struct v4l2_subdev_pad_ops resizer_v4l2_pad_ops = {
1593 	.enum_mbus_code = resizer_enum_mbus_code,
1594 	.enum_frame_size = resizer_enum_frame_size,
1595 	.get_fmt = resizer_get_format,
1596 	.set_fmt = resizer_set_format,
1597 	.get_selection = resizer_get_selection,
1598 	.set_selection = resizer_set_selection,
1599 	.link_validate = resizer_link_validate,
1600 };
1601 
1602 /* subdev operations */
1603 static const struct v4l2_subdev_ops resizer_v4l2_ops = {
1604 	.video = &resizer_v4l2_video_ops,
1605 	.pad = &resizer_v4l2_pad_ops,
1606 };
1607 
1608 /* subdev internal operations */
1609 static const struct v4l2_subdev_internal_ops resizer_v4l2_internal_ops = {
1610 	.open = resizer_init_formats,
1611 };
1612 
1613 /* -----------------------------------------------------------------------------
1614  * Media entity operations
1615  */
1616 
1617 /*
1618  * resizer_link_setup - Setup resizer connections.
1619  * @entity : Pointer to media entity structure
1620  * @local  : Pointer to local pad array
1621  * @remote : Pointer to remote pad array
1622  * @flags  : Link flags
1623  * return -EINVAL or zero on success
1624  */
resizer_link_setup(struct media_entity * entity,const struct media_pad * local,const struct media_pad * remote,u32 flags)1625 static int resizer_link_setup(struct media_entity *entity,
1626 			      const struct media_pad *local,
1627 			      const struct media_pad *remote, u32 flags)
1628 {
1629 	struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
1630 	struct isp_res_device *res = v4l2_get_subdevdata(sd);
1631 	unsigned int index = local->index;
1632 
1633 	/* FIXME: this is actually a hack! */
1634 	if (is_media_entity_v4l2_subdev(remote->entity))
1635 		index |= 2 << 16;
1636 
1637 	switch (index) {
1638 	case RESZ_PAD_SINK:
1639 		/* read from memory */
1640 		if (flags & MEDIA_LNK_FL_ENABLED) {
1641 			if (res->input == RESIZER_INPUT_VP)
1642 				return -EBUSY;
1643 			res->input = RESIZER_INPUT_MEMORY;
1644 		} else {
1645 			if (res->input == RESIZER_INPUT_MEMORY)
1646 				res->input = RESIZER_INPUT_NONE;
1647 		}
1648 		break;
1649 
1650 	case RESZ_PAD_SINK | 2 << 16:
1651 		/* read from ccdc or previewer */
1652 		if (flags & MEDIA_LNK_FL_ENABLED) {
1653 			if (res->input == RESIZER_INPUT_MEMORY)
1654 				return -EBUSY;
1655 			res->input = RESIZER_INPUT_VP;
1656 		} else {
1657 			if (res->input == RESIZER_INPUT_VP)
1658 				res->input = RESIZER_INPUT_NONE;
1659 		}
1660 		break;
1661 
1662 	case RESZ_PAD_SOURCE:
1663 		/* resizer always write to memory */
1664 		break;
1665 
1666 	default:
1667 		return -EINVAL;
1668 	}
1669 
1670 	return 0;
1671 }
1672 
1673 /* media operations */
1674 static const struct media_entity_operations resizer_media_ops = {
1675 	.link_setup = resizer_link_setup,
1676 	.link_validate = v4l2_subdev_link_validate,
1677 };
1678 
omap3isp_resizer_unregister_entities(struct isp_res_device * res)1679 void omap3isp_resizer_unregister_entities(struct isp_res_device *res)
1680 {
1681 	v4l2_device_unregister_subdev(&res->subdev);
1682 	omap3isp_video_unregister(&res->video_in);
1683 	omap3isp_video_unregister(&res->video_out);
1684 }
1685 
omap3isp_resizer_register_entities(struct isp_res_device * res,struct v4l2_device * vdev)1686 int omap3isp_resizer_register_entities(struct isp_res_device *res,
1687 				       struct v4l2_device *vdev)
1688 {
1689 	int ret;
1690 
1691 	/* Register the subdev and video nodes. */
1692 	res->subdev.dev = vdev->mdev->dev;
1693 	ret = v4l2_device_register_subdev(vdev, &res->subdev);
1694 	if (ret < 0)
1695 		goto error;
1696 
1697 	ret = omap3isp_video_register(&res->video_in, vdev);
1698 	if (ret < 0)
1699 		goto error;
1700 
1701 	ret = omap3isp_video_register(&res->video_out, vdev);
1702 	if (ret < 0)
1703 		goto error;
1704 
1705 	return 0;
1706 
1707 error:
1708 	omap3isp_resizer_unregister_entities(res);
1709 	return ret;
1710 }
1711 
1712 /* -----------------------------------------------------------------------------
1713  * ISP resizer initialization and cleanup
1714  */
1715 
1716 /*
1717  * resizer_init_entities - Initialize resizer subdev and media entity.
1718  * @res : Pointer to resizer device structure
1719  * return -ENOMEM or zero on success
1720  */
resizer_init_entities(struct isp_res_device * res)1721 static int resizer_init_entities(struct isp_res_device *res)
1722 {
1723 	struct v4l2_subdev *sd = &res->subdev;
1724 	struct media_pad *pads = res->pads;
1725 	struct media_entity *me = &sd->entity;
1726 	int ret;
1727 
1728 	res->input = RESIZER_INPUT_NONE;
1729 
1730 	v4l2_subdev_init(sd, &resizer_v4l2_ops);
1731 	sd->internal_ops = &resizer_v4l2_internal_ops;
1732 	strscpy(sd->name, "OMAP3 ISP resizer", sizeof(sd->name));
1733 	sd->grp_id = 1 << 16;	/* group ID for isp subdevs */
1734 	v4l2_set_subdevdata(sd, res);
1735 	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1736 
1737 	pads[RESZ_PAD_SINK].flags = MEDIA_PAD_FL_SINK
1738 				    | MEDIA_PAD_FL_MUST_CONNECT;
1739 	pads[RESZ_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
1740 
1741 	me->ops = &resizer_media_ops;
1742 	ret = media_entity_pads_init(me, RESZ_PADS_NUM, pads);
1743 	if (ret < 0)
1744 		return ret;
1745 
1746 	resizer_init_formats(sd, NULL);
1747 
1748 	res->video_in.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1749 	res->video_in.ops = &resizer_video_ops;
1750 	res->video_in.isp = to_isp_device(res);
1751 	res->video_in.capture_mem = PAGE_ALIGN(4096 * 4096) * 2 * 3;
1752 	res->video_in.bpl_alignment = 32;
1753 	res->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1754 	res->video_out.ops = &resizer_video_ops;
1755 	res->video_out.isp = to_isp_device(res);
1756 	res->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 2 * 3;
1757 	res->video_out.bpl_alignment = 32;
1758 
1759 	ret = omap3isp_video_init(&res->video_in, "resizer");
1760 	if (ret < 0)
1761 		goto error_video_in;
1762 
1763 	ret = omap3isp_video_init(&res->video_out, "resizer");
1764 	if (ret < 0)
1765 		goto error_video_out;
1766 
1767 	res->video_out.video.entity.flags |= MEDIA_ENT_FL_DEFAULT;
1768 
1769 	return 0;
1770 
1771 error_video_out:
1772 	omap3isp_video_cleanup(&res->video_in);
1773 error_video_in:
1774 	media_entity_cleanup(&res->subdev.entity);
1775 	return ret;
1776 }
1777 
1778 /*
1779  * isp_resizer_init - Resizer initialization.
1780  * @isp : Pointer to ISP device
1781  * return -ENOMEM or zero on success
1782  */
omap3isp_resizer_init(struct isp_device * isp)1783 int omap3isp_resizer_init(struct isp_device *isp)
1784 {
1785 	struct isp_res_device *res = &isp->isp_res;
1786 
1787 	init_waitqueue_head(&res->wait);
1788 	atomic_set(&res->stopping, 0);
1789 	spin_lock_init(&res->lock);
1790 
1791 	return resizer_init_entities(res);
1792 }
1793 
omap3isp_resizer_cleanup(struct isp_device * isp)1794 void omap3isp_resizer_cleanup(struct isp_device *isp)
1795 {
1796 	struct isp_res_device *res = &isp->isp_res;
1797 
1798 	omap3isp_video_cleanup(&res->video_in);
1799 	omap3isp_video_cleanup(&res->video_out);
1800 	media_entity_cleanup(&res->subdev.entity);
1801 }
1802