1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * camss-ispif.c
4  *
5  * Qualcomm MSM Camera Subsystem - ISPIF (ISP Interface) Module
6  *
7  * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
8  * Copyright (C) 2015-2018 Linaro Ltd.
9  */
10 #include <linux/clk.h>
11 #include <linux/completion.h>
12 #include <linux/interrupt.h>
13 #include <linux/io.h>
14 #include <linux/iopoll.h>
15 #include <linux/kernel.h>
16 #include <linux/mutex.h>
17 #include <linux/platform_device.h>
18 #include <linux/pm_runtime.h>
19 #include <media/media-entity.h>
20 #include <media/v4l2-device.h>
21 #include <media/v4l2-subdev.h>
22 
23 #include "camss-ispif.h"
24 #include "camss.h"
25 
26 #define MSM_ISPIF_NAME "msm_ispif"
27 
28 #define ISPIF_RST_CMD_0			0x008
29 #define ISPIF_RST_CMD_1			0x00c
30 #define ISPIF_RST_CMD_0_STROBED_RST_EN		(1 << 0)
31 #define ISPIF_RST_CMD_0_MISC_LOGIC_RST		(1 << 1)
32 #define ISPIF_RST_CMD_0_SW_REG_RST		(1 << 2)
33 #define ISPIF_RST_CMD_0_PIX_INTF_0_CSID_RST	(1 << 3)
34 #define ISPIF_RST_CMD_0_PIX_INTF_0_VFE_RST	(1 << 4)
35 #define ISPIF_RST_CMD_0_PIX_INTF_1_CSID_RST	(1 << 5)
36 #define ISPIF_RST_CMD_0_PIX_INTF_1_VFE_RST	(1 << 6)
37 #define ISPIF_RST_CMD_0_RDI_INTF_0_CSID_RST	(1 << 7)
38 #define ISPIF_RST_CMD_0_RDI_INTF_0_VFE_RST	(1 << 8)
39 #define ISPIF_RST_CMD_0_RDI_INTF_1_CSID_RST	(1 << 9)
40 #define ISPIF_RST_CMD_0_RDI_INTF_1_VFE_RST	(1 << 10)
41 #define ISPIF_RST_CMD_0_RDI_INTF_2_CSID_RST	(1 << 11)
42 #define ISPIF_RST_CMD_0_RDI_INTF_2_VFE_RST	(1 << 12)
43 #define ISPIF_RST_CMD_0_PIX_OUTPUT_0_MISR_RST	(1 << 16)
44 #define ISPIF_RST_CMD_0_RDI_OUTPUT_0_MISR_RST	(1 << 17)
45 #define ISPIF_RST_CMD_0_RDI_OUTPUT_1_MISR_RST	(1 << 18)
46 #define ISPIF_RST_CMD_0_RDI_OUTPUT_2_MISR_RST	(1 << 19)
47 #define ISPIF_IRQ_GLOBAL_CLEAR_CMD	0x01c
48 #define ISPIF_VFE_m_CTRL_0(m)		(0x200 + 0x200 * (m))
49 #define ISPIF_VFE_m_CTRL_0_PIX0_LINE_BUF_EN	(1 << 6)
50 #define ISPIF_VFE_m_IRQ_MASK_0(m)	(0x208 + 0x200 * (m))
51 #define ISPIF_VFE_m_IRQ_MASK_0_PIX0_ENABLE	0x00001249
52 #define ISPIF_VFE_m_IRQ_MASK_0_PIX0_MASK	0x00001fff
53 #define ISPIF_VFE_m_IRQ_MASK_0_RDI0_ENABLE	0x02492000
54 #define ISPIF_VFE_m_IRQ_MASK_0_RDI0_MASK	0x03ffe000
55 #define ISPIF_VFE_m_IRQ_MASK_1(m)	(0x20c + 0x200 * (m))
56 #define ISPIF_VFE_m_IRQ_MASK_1_PIX1_ENABLE	0x00001249
57 #define ISPIF_VFE_m_IRQ_MASK_1_PIX1_MASK	0x00001fff
58 #define ISPIF_VFE_m_IRQ_MASK_1_RDI1_ENABLE	0x02492000
59 #define ISPIF_VFE_m_IRQ_MASK_1_RDI1_MASK	0x03ffe000
60 #define ISPIF_VFE_m_IRQ_MASK_2(m)	(0x210 + 0x200 * (m))
61 #define ISPIF_VFE_m_IRQ_MASK_2_RDI2_ENABLE	0x00001249
62 #define ISPIF_VFE_m_IRQ_MASK_2_RDI2_MASK	0x00001fff
63 #define ISPIF_VFE_m_IRQ_STATUS_0(m)	(0x21c + 0x200 * (m))
64 #define ISPIF_VFE_m_IRQ_STATUS_0_PIX0_OVERFLOW	(1 << 12)
65 #define ISPIF_VFE_m_IRQ_STATUS_0_RDI0_OVERFLOW	(1 << 25)
66 #define ISPIF_VFE_m_IRQ_STATUS_1(m)	(0x220 + 0x200 * (m))
67 #define ISPIF_VFE_m_IRQ_STATUS_1_PIX1_OVERFLOW	(1 << 12)
68 #define ISPIF_VFE_m_IRQ_STATUS_1_RDI1_OVERFLOW	(1 << 25)
69 #define ISPIF_VFE_m_IRQ_STATUS_2(m)	(0x224 + 0x200 * (m))
70 #define ISPIF_VFE_m_IRQ_STATUS_2_RDI2_OVERFLOW	(1 << 12)
71 #define ISPIF_VFE_m_IRQ_CLEAR_0(m)	(0x230 + 0x200 * (m))
72 #define ISPIF_VFE_m_IRQ_CLEAR_1(m)	(0x234 + 0x200 * (m))
73 #define ISPIF_VFE_m_IRQ_CLEAR_2(m)	(0x238 + 0x200 * (m))
74 #define ISPIF_VFE_m_INTF_INPUT_SEL(m)	(0x244 + 0x200 * (m))
75 #define ISPIF_VFE_m_INTF_CMD_0(m)	(0x248 + 0x200 * (m))
76 #define ISPIF_VFE_m_INTF_CMD_1(m)	(0x24c + 0x200 * (m))
77 #define ISPIF_VFE_m_PIX_INTF_n_CID_MASK(m, n)	\
78 					(0x254 + 0x200 * (m) + 0x4 * (n))
79 #define ISPIF_VFE_m_RDI_INTF_n_CID_MASK(m, n)	\
80 					(0x264 + 0x200 * (m) + 0x4 * (n))
81 /* PACK_CFG registers are 8x96 only */
82 #define ISPIF_VFE_m_RDI_INTF_n_PACK_CFG_0(m, n)	\
83 					(0x270 + 0x200 * (m) + 0x4 * (n))
84 #define ISPIF_VFE_m_RDI_INTF_n_PACK_CFG_1(m, n)	\
85 					(0x27c + 0x200 * (m) + 0x4 * (n))
86 #define ISPIF_VFE_m_RDI_INTF_n_PACK_CFG_0_CID_c_PLAIN(c)	\
87 					(1 << ((cid % 8) * 4))
88 #define ISPIF_VFE_m_PIX_INTF_n_STATUS(m, n)	\
89 					(0x2c0 + 0x200 * (m) + 0x4 * (n))
90 #define ISPIF_VFE_m_RDI_INTF_n_STATUS(m, n)	\
91 					(0x2d0 + 0x200 * (m) + 0x4 * (n))
92 
93 #define CSI_PIX_CLK_MUX_SEL		0x000
94 #define CSI_RDI_CLK_MUX_SEL		0x008
95 
96 #define ISPIF_TIMEOUT_SLEEP_US		1000
97 #define ISPIF_TIMEOUT_ALL_US		1000000
98 #define ISPIF_RESET_TIMEOUT_MS		500
99 
100 enum ispif_intf_cmd {
101 	CMD_DISABLE_FRAME_BOUNDARY = 0x0,
102 	CMD_ENABLE_FRAME_BOUNDARY = 0x1,
103 	CMD_DISABLE_IMMEDIATELY = 0x2,
104 	CMD_ALL_DISABLE_IMMEDIATELY = 0xaaaaaaaa,
105 	CMD_ALL_NO_CHANGE = 0xffffffff,
106 };
107 
108 static const u32 ispif_formats_8x16[] = {
109 	MEDIA_BUS_FMT_UYVY8_2X8,
110 	MEDIA_BUS_FMT_VYUY8_2X8,
111 	MEDIA_BUS_FMT_YUYV8_2X8,
112 	MEDIA_BUS_FMT_YVYU8_2X8,
113 	MEDIA_BUS_FMT_SBGGR8_1X8,
114 	MEDIA_BUS_FMT_SGBRG8_1X8,
115 	MEDIA_BUS_FMT_SGRBG8_1X8,
116 	MEDIA_BUS_FMT_SRGGB8_1X8,
117 	MEDIA_BUS_FMT_SBGGR10_1X10,
118 	MEDIA_BUS_FMT_SGBRG10_1X10,
119 	MEDIA_BUS_FMT_SGRBG10_1X10,
120 	MEDIA_BUS_FMT_SRGGB10_1X10,
121 	MEDIA_BUS_FMT_SBGGR12_1X12,
122 	MEDIA_BUS_FMT_SGBRG12_1X12,
123 	MEDIA_BUS_FMT_SGRBG12_1X12,
124 	MEDIA_BUS_FMT_SRGGB12_1X12,
125 	MEDIA_BUS_FMT_Y10_1X10,
126 };
127 
128 static const u32 ispif_formats_8x96[] = {
129 	MEDIA_BUS_FMT_UYVY8_2X8,
130 	MEDIA_BUS_FMT_VYUY8_2X8,
131 	MEDIA_BUS_FMT_YUYV8_2X8,
132 	MEDIA_BUS_FMT_YVYU8_2X8,
133 	MEDIA_BUS_FMT_SBGGR8_1X8,
134 	MEDIA_BUS_FMT_SGBRG8_1X8,
135 	MEDIA_BUS_FMT_SGRBG8_1X8,
136 	MEDIA_BUS_FMT_SRGGB8_1X8,
137 	MEDIA_BUS_FMT_SBGGR10_1X10,
138 	MEDIA_BUS_FMT_SGBRG10_1X10,
139 	MEDIA_BUS_FMT_SGRBG10_1X10,
140 	MEDIA_BUS_FMT_SRGGB10_1X10,
141 	MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE,
142 	MEDIA_BUS_FMT_SBGGR12_1X12,
143 	MEDIA_BUS_FMT_SGBRG12_1X12,
144 	MEDIA_BUS_FMT_SGRBG12_1X12,
145 	MEDIA_BUS_FMT_SRGGB12_1X12,
146 	MEDIA_BUS_FMT_SBGGR14_1X14,
147 	MEDIA_BUS_FMT_SGBRG14_1X14,
148 	MEDIA_BUS_FMT_SGRBG14_1X14,
149 	MEDIA_BUS_FMT_SRGGB14_1X14,
150 	MEDIA_BUS_FMT_Y10_1X10,
151 	MEDIA_BUS_FMT_Y10_2X8_PADHI_LE,
152 };
153 
154 /*
155  * ispif_isr_8x96 - ISPIF module interrupt handler for 8x96
156  * @irq: Interrupt line
157  * @dev: ISPIF device
158  *
159  * Return IRQ_HANDLED on success
160  */
161 static irqreturn_t ispif_isr_8x96(int irq, void *dev)
162 {
163 	struct ispif_device *ispif = dev;
164 	struct camss *camss = ispif->camss;
165 	u32 value0, value1, value2, value3, value4, value5;
166 
167 	value0 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_0(0));
168 	value1 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_1(0));
169 	value2 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_2(0));
170 	value3 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_0(1));
171 	value4 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_1(1));
172 	value5 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_2(1));
173 
174 	writel_relaxed(value0, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_0(0));
175 	writel_relaxed(value1, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_1(0));
176 	writel_relaxed(value2, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_2(0));
177 	writel_relaxed(value3, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_0(1));
178 	writel_relaxed(value4, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_1(1));
179 	writel_relaxed(value5, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_2(1));
180 
181 	writel(0x1, ispif->base + ISPIF_IRQ_GLOBAL_CLEAR_CMD);
182 
183 	if ((value0 >> 27) & 0x1)
184 		complete(&ispif->reset_complete[0]);
185 
186 	if ((value3 >> 27) & 0x1)
187 		complete(&ispif->reset_complete[1]);
188 
189 	if (unlikely(value0 & ISPIF_VFE_m_IRQ_STATUS_0_PIX0_OVERFLOW))
190 		dev_err_ratelimited(camss->dev, "VFE0 pix0 overflow\n");
191 
192 	if (unlikely(value0 & ISPIF_VFE_m_IRQ_STATUS_0_RDI0_OVERFLOW))
193 		dev_err_ratelimited(camss->dev, "VFE0 rdi0 overflow\n");
194 
195 	if (unlikely(value1 & ISPIF_VFE_m_IRQ_STATUS_1_PIX1_OVERFLOW))
196 		dev_err_ratelimited(camss->dev, "VFE0 pix1 overflow\n");
197 
198 	if (unlikely(value1 & ISPIF_VFE_m_IRQ_STATUS_1_RDI1_OVERFLOW))
199 		dev_err_ratelimited(camss->dev, "VFE0 rdi1 overflow\n");
200 
201 	if (unlikely(value2 & ISPIF_VFE_m_IRQ_STATUS_2_RDI2_OVERFLOW))
202 		dev_err_ratelimited(camss->dev, "VFE0 rdi2 overflow\n");
203 
204 	if (unlikely(value3 & ISPIF_VFE_m_IRQ_STATUS_0_PIX0_OVERFLOW))
205 		dev_err_ratelimited(camss->dev, "VFE1 pix0 overflow\n");
206 
207 	if (unlikely(value3 & ISPIF_VFE_m_IRQ_STATUS_0_RDI0_OVERFLOW))
208 		dev_err_ratelimited(camss->dev, "VFE1 rdi0 overflow\n");
209 
210 	if (unlikely(value4 & ISPIF_VFE_m_IRQ_STATUS_1_PIX1_OVERFLOW))
211 		dev_err_ratelimited(camss->dev, "VFE1 pix1 overflow\n");
212 
213 	if (unlikely(value4 & ISPIF_VFE_m_IRQ_STATUS_1_RDI1_OVERFLOW))
214 		dev_err_ratelimited(camss->dev, "VFE1 rdi1 overflow\n");
215 
216 	if (unlikely(value5 & ISPIF_VFE_m_IRQ_STATUS_2_RDI2_OVERFLOW))
217 		dev_err_ratelimited(camss->dev, "VFE1 rdi2 overflow\n");
218 
219 	return IRQ_HANDLED;
220 }
221 
222 /*
223  * ispif_isr_8x16 - ISPIF module interrupt handler for 8x16
224  * @irq: Interrupt line
225  * @dev: ISPIF device
226  *
227  * Return IRQ_HANDLED on success
228  */
229 static irqreturn_t ispif_isr_8x16(int irq, void *dev)
230 {
231 	struct ispif_device *ispif = dev;
232 	struct camss *camss = ispif->camss;
233 	u32 value0, value1, value2;
234 
235 	value0 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_0(0));
236 	value1 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_1(0));
237 	value2 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_2(0));
238 
239 	writel_relaxed(value0, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_0(0));
240 	writel_relaxed(value1, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_1(0));
241 	writel_relaxed(value2, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_2(0));
242 
243 	writel(0x1, ispif->base + ISPIF_IRQ_GLOBAL_CLEAR_CMD);
244 
245 	if ((value0 >> 27) & 0x1)
246 		complete(&ispif->reset_complete[0]);
247 
248 	if (unlikely(value0 & ISPIF_VFE_m_IRQ_STATUS_0_PIX0_OVERFLOW))
249 		dev_err_ratelimited(camss->dev, "VFE0 pix0 overflow\n");
250 
251 	if (unlikely(value0 & ISPIF_VFE_m_IRQ_STATUS_0_RDI0_OVERFLOW))
252 		dev_err_ratelimited(camss->dev, "VFE0 rdi0 overflow\n");
253 
254 	if (unlikely(value1 & ISPIF_VFE_m_IRQ_STATUS_1_PIX1_OVERFLOW))
255 		dev_err_ratelimited(camss->dev, "VFE0 pix1 overflow\n");
256 
257 	if (unlikely(value1 & ISPIF_VFE_m_IRQ_STATUS_1_RDI1_OVERFLOW))
258 		dev_err_ratelimited(camss->dev, "VFE0 rdi1 overflow\n");
259 
260 	if (unlikely(value2 & ISPIF_VFE_m_IRQ_STATUS_2_RDI2_OVERFLOW))
261 		dev_err_ratelimited(camss->dev, "VFE0 rdi2 overflow\n");
262 
263 	return IRQ_HANDLED;
264 }
265 
266 static int ispif_vfe_reset(struct ispif_device *ispif, u8 vfe_id)
267 {
268 	struct camss *camss = ispif->camss;
269 
270 	unsigned long time;
271 	u32 val;
272 
273 	if (vfe_id > (camss->vfe_num - 1)) {
274 		dev_err(camss->dev,
275 			"Error: asked reset for invalid VFE%d\n", vfe_id);
276 		return -ENOENT;
277 	}
278 
279 	reinit_completion(&ispif->reset_complete[vfe_id]);
280 
281 	val = ISPIF_RST_CMD_0_STROBED_RST_EN |
282 		ISPIF_RST_CMD_0_MISC_LOGIC_RST |
283 		ISPIF_RST_CMD_0_SW_REG_RST |
284 		ISPIF_RST_CMD_0_PIX_INTF_0_CSID_RST |
285 		ISPIF_RST_CMD_0_PIX_INTF_0_VFE_RST |
286 		ISPIF_RST_CMD_0_PIX_INTF_1_CSID_RST |
287 		ISPIF_RST_CMD_0_PIX_INTF_1_VFE_RST |
288 		ISPIF_RST_CMD_0_RDI_INTF_0_CSID_RST |
289 		ISPIF_RST_CMD_0_RDI_INTF_0_VFE_RST |
290 		ISPIF_RST_CMD_0_RDI_INTF_1_CSID_RST |
291 		ISPIF_RST_CMD_0_RDI_INTF_1_VFE_RST |
292 		ISPIF_RST_CMD_0_RDI_INTF_2_CSID_RST |
293 		ISPIF_RST_CMD_0_RDI_INTF_2_VFE_RST |
294 		ISPIF_RST_CMD_0_PIX_OUTPUT_0_MISR_RST |
295 		ISPIF_RST_CMD_0_RDI_OUTPUT_0_MISR_RST |
296 		ISPIF_RST_CMD_0_RDI_OUTPUT_1_MISR_RST |
297 		ISPIF_RST_CMD_0_RDI_OUTPUT_2_MISR_RST;
298 
299 	if (vfe_id == 1)
300 		writel_relaxed(val, ispif->base + ISPIF_RST_CMD_1);
301 	else
302 		writel_relaxed(val, ispif->base + ISPIF_RST_CMD_0);
303 
304 	time = wait_for_completion_timeout(&ispif->reset_complete[vfe_id],
305 		msecs_to_jiffies(ISPIF_RESET_TIMEOUT_MS));
306 	if (!time) {
307 		dev_err(camss->dev,
308 			"ISPIF for VFE%d reset timeout\n", vfe_id);
309 		return -EIO;
310 	}
311 
312 	return 0;
313 }
314 
315 /*
316  * ispif_reset - Trigger reset on ISPIF module and wait to complete
317  * @ispif: ISPIF device
318  *
319  * Return 0 on success or a negative error code otherwise
320  */
321 static int ispif_reset(struct ispif_device *ispif, u8 vfe_id)
322 {
323 	struct camss *camss = ispif->camss;
324 	int ret;
325 
326 	ret = camss_pm_domain_on(camss, PM_DOMAIN_VFE0);
327 	if (ret < 0)
328 		return ret;
329 
330 	ret = camss_pm_domain_on(camss, PM_DOMAIN_VFE1);
331 	if (ret < 0)
332 		return ret;
333 
334 	ret = camss_enable_clocks(ispif->nclocks_for_reset,
335 				  ispif->clock_for_reset,
336 				  camss->dev);
337 	if (ret < 0)
338 		return ret;
339 
340 	ret = ispif_vfe_reset(ispif, vfe_id);
341 	if (ret)
342 		dev_dbg(camss->dev, "ISPIF Reset failed\n");
343 
344 	camss_disable_clocks(ispif->nclocks_for_reset, ispif->clock_for_reset);
345 
346 	camss_pm_domain_off(camss, PM_DOMAIN_VFE0);
347 	camss_pm_domain_off(camss, PM_DOMAIN_VFE1);
348 
349 	return ret;
350 }
351 
352 /*
353  * ispif_set_power - Power on/off ISPIF module
354  * @sd: ISPIF V4L2 subdevice
355  * @on: Requested power state
356  *
357  * Return 0 on success or a negative error code otherwise
358  */
359 static int ispif_set_power(struct v4l2_subdev *sd, int on)
360 {
361 	struct ispif_line *line = v4l2_get_subdevdata(sd);
362 	struct ispif_device *ispif = line->ispif;
363 	struct device *dev = ispif->camss->dev;
364 	int ret = 0;
365 
366 	mutex_lock(&ispif->power_lock);
367 
368 	if (on) {
369 		if (ispif->power_count) {
370 			/* Power is already on */
371 			ispif->power_count++;
372 			goto exit;
373 		}
374 
375 		ret = pm_runtime_resume_and_get(dev);
376 		if (ret < 0)
377 			goto exit;
378 
379 		ret = camss_enable_clocks(ispif->nclocks, ispif->clock, dev);
380 		if (ret < 0) {
381 			pm_runtime_put_sync(dev);
382 			goto exit;
383 		}
384 
385 		ret = ispif_reset(ispif, line->vfe_id);
386 		if (ret < 0) {
387 			pm_runtime_put_sync(dev);
388 			camss_disable_clocks(ispif->nclocks, ispif->clock);
389 			goto exit;
390 		}
391 
392 		ispif->intf_cmd[line->vfe_id].cmd_0 = CMD_ALL_NO_CHANGE;
393 		ispif->intf_cmd[line->vfe_id].cmd_1 = CMD_ALL_NO_CHANGE;
394 
395 		ispif->power_count++;
396 	} else {
397 		if (ispif->power_count == 0) {
398 			dev_err(dev, "ispif power off on power_count == 0\n");
399 			goto exit;
400 		} else if (ispif->power_count == 1) {
401 			camss_disable_clocks(ispif->nclocks, ispif->clock);
402 			pm_runtime_put_sync(dev);
403 		}
404 
405 		ispif->power_count--;
406 	}
407 
408 exit:
409 	mutex_unlock(&ispif->power_lock);
410 
411 	return ret;
412 }
413 
414 /*
415  * ispif_select_clk_mux - Select clock for PIX/RDI interface
416  * @ispif: ISPIF device
417  * @intf: VFE interface
418  * @csid: CSID HW module id
419  * @vfe: VFE HW module id
420  * @enable: enable or disable the selected clock
421  */
422 static void ispif_select_clk_mux(struct ispif_device *ispif,
423 				 enum ispif_intf intf, u8 csid,
424 				 u8 vfe, u8 enable)
425 {
426 	u32 val;
427 
428 	switch (intf) {
429 	case PIX0:
430 		val = readl_relaxed(ispif->base_clk_mux + CSI_PIX_CLK_MUX_SEL);
431 		val &= ~(0xf << (vfe * 8));
432 		if (enable)
433 			val |= (csid << (vfe * 8));
434 		writel_relaxed(val, ispif->base_clk_mux + CSI_PIX_CLK_MUX_SEL);
435 		break;
436 
437 	case RDI0:
438 		val = readl_relaxed(ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
439 		val &= ~(0xf << (vfe * 12));
440 		if (enable)
441 			val |= (csid << (vfe * 12));
442 		writel_relaxed(val, ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
443 		break;
444 
445 	case PIX1:
446 		val = readl_relaxed(ispif->base_clk_mux + CSI_PIX_CLK_MUX_SEL);
447 		val &= ~(0xf << (4 + (vfe * 8)));
448 		if (enable)
449 			val |= (csid << (4 + (vfe * 8)));
450 		writel_relaxed(val, ispif->base_clk_mux + CSI_PIX_CLK_MUX_SEL);
451 		break;
452 
453 	case RDI1:
454 		val = readl_relaxed(ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
455 		val &= ~(0xf << (4 + (vfe * 12)));
456 		if (enable)
457 			val |= (csid << (4 + (vfe * 12)));
458 		writel_relaxed(val, ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
459 		break;
460 
461 	case RDI2:
462 		val = readl_relaxed(ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
463 		val &= ~(0xf << (8 + (vfe * 12)));
464 		if (enable)
465 			val |= (csid << (8 + (vfe * 12)));
466 		writel_relaxed(val, ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
467 		break;
468 	}
469 
470 	mb();
471 }
472 
473 /*
474  * ispif_validate_intf_status - Validate current status of PIX/RDI interface
475  * @ispif: ISPIF device
476  * @intf: VFE interface
477  * @vfe: VFE HW module id
478  *
479  * Return 0 when interface is idle or -EBUSY otherwise
480  */
481 static int ispif_validate_intf_status(struct ispif_device *ispif,
482 				      enum ispif_intf intf, u8 vfe)
483 {
484 	int ret = 0;
485 	u32 val = 0;
486 
487 	switch (intf) {
488 	case PIX0:
489 		val = readl_relaxed(ispif->base +
490 			ISPIF_VFE_m_PIX_INTF_n_STATUS(vfe, 0));
491 		break;
492 	case RDI0:
493 		val = readl_relaxed(ispif->base +
494 			ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 0));
495 		break;
496 	case PIX1:
497 		val = readl_relaxed(ispif->base +
498 			ISPIF_VFE_m_PIX_INTF_n_STATUS(vfe, 1));
499 		break;
500 	case RDI1:
501 		val = readl_relaxed(ispif->base +
502 			ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 1));
503 		break;
504 	case RDI2:
505 		val = readl_relaxed(ispif->base +
506 			ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 2));
507 		break;
508 	}
509 
510 	if ((val & 0xf) != 0xf) {
511 		dev_err(ispif->camss->dev, "%s: ispif is busy: 0x%x\n",
512 			__func__, val);
513 		ret = -EBUSY;
514 	}
515 
516 	return ret;
517 }
518 
519 /*
520  * ispif_wait_for_stop - Wait for PIX/RDI interface to stop
521  * @ispif: ISPIF device
522  * @intf: VFE interface
523  * @vfe: VFE HW module id
524  *
525  * Return 0 on success or a negative error code otherwise
526  */
527 static int ispif_wait_for_stop(struct ispif_device *ispif,
528 			       enum ispif_intf intf, u8 vfe)
529 {
530 	u32 addr = 0;
531 	u32 stop_flag = 0;
532 	int ret;
533 
534 	switch (intf) {
535 	case PIX0:
536 		addr = ISPIF_VFE_m_PIX_INTF_n_STATUS(vfe, 0);
537 		break;
538 	case RDI0:
539 		addr = ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 0);
540 		break;
541 	case PIX1:
542 		addr = ISPIF_VFE_m_PIX_INTF_n_STATUS(vfe, 1);
543 		break;
544 	case RDI1:
545 		addr = ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 1);
546 		break;
547 	case RDI2:
548 		addr = ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 2);
549 		break;
550 	}
551 
552 	ret = readl_poll_timeout(ispif->base + addr,
553 				 stop_flag,
554 				 (stop_flag & 0xf) == 0xf,
555 				 ISPIF_TIMEOUT_SLEEP_US,
556 				 ISPIF_TIMEOUT_ALL_US);
557 	if (ret < 0)
558 		dev_err(ispif->camss->dev, "%s: ispif stop timeout\n",
559 			__func__);
560 
561 	return ret;
562 }
563 
564 /*
565  * ispif_select_csid - Select CSID HW module for input from
566  * @ispif: ISPIF device
567  * @intf: VFE interface
568  * @csid: CSID HW module id
569  * @vfe: VFE HW module id
570  * @enable: enable or disable the selected input
571  */
572 static void ispif_select_csid(struct ispif_device *ispif, enum ispif_intf intf,
573 			      u8 csid, u8 vfe, u8 enable)
574 {
575 	u32 val;
576 
577 	val = readl_relaxed(ispif->base + ISPIF_VFE_m_INTF_INPUT_SEL(vfe));
578 	switch (intf) {
579 	case PIX0:
580 		val &= ~(BIT(1) | BIT(0));
581 		if (enable)
582 			val |= csid;
583 		break;
584 	case RDI0:
585 		val &= ~(BIT(5) | BIT(4));
586 		if (enable)
587 			val |= (csid << 4);
588 		break;
589 	case PIX1:
590 		val &= ~(BIT(9) | BIT(8));
591 		if (enable)
592 			val |= (csid << 8);
593 		break;
594 	case RDI1:
595 		val &= ~(BIT(13) | BIT(12));
596 		if (enable)
597 			val |= (csid << 12);
598 		break;
599 	case RDI2:
600 		val &= ~(BIT(21) | BIT(20));
601 		if (enable)
602 			val |= (csid << 20);
603 		break;
604 	}
605 
606 	writel(val, ispif->base + ISPIF_VFE_m_INTF_INPUT_SEL(vfe));
607 }
608 
609 /*
610  * ispif_select_cid - Enable/disable desired CID
611  * @ispif: ISPIF device
612  * @intf: VFE interface
613  * @cid: desired CID to enable/disable
614  * @vfe: VFE HW module id
615  * @enable: enable or disable the desired CID
616  */
617 static void ispif_select_cid(struct ispif_device *ispif, enum ispif_intf intf,
618 			     u8 cid, u8 vfe, u8 enable)
619 {
620 	u32 cid_mask = 1 << cid;
621 	u32 addr = 0;
622 	u32 val;
623 
624 	switch (intf) {
625 	case PIX0:
626 		addr = ISPIF_VFE_m_PIX_INTF_n_CID_MASK(vfe, 0);
627 		break;
628 	case RDI0:
629 		addr = ISPIF_VFE_m_RDI_INTF_n_CID_MASK(vfe, 0);
630 		break;
631 	case PIX1:
632 		addr = ISPIF_VFE_m_PIX_INTF_n_CID_MASK(vfe, 1);
633 		break;
634 	case RDI1:
635 		addr = ISPIF_VFE_m_RDI_INTF_n_CID_MASK(vfe, 1);
636 		break;
637 	case RDI2:
638 		addr = ISPIF_VFE_m_RDI_INTF_n_CID_MASK(vfe, 2);
639 		break;
640 	}
641 
642 	val = readl_relaxed(ispif->base + addr);
643 	if (enable)
644 		val |= cid_mask;
645 	else
646 		val &= ~cid_mask;
647 
648 	writel(val, ispif->base + addr);
649 }
650 
651 /*
652  * ispif_config_irq - Enable/disable interrupts for PIX/RDI interface
653  * @ispif: ISPIF device
654  * @intf: VFE interface
655  * @vfe: VFE HW module id
656  * @enable: enable or disable
657  */
658 static void ispif_config_irq(struct ispif_device *ispif, enum ispif_intf intf,
659 			     u8 vfe, u8 enable)
660 {
661 	u32 val;
662 
663 	switch (intf) {
664 	case PIX0:
665 		val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_0(vfe));
666 		val &= ~ISPIF_VFE_m_IRQ_MASK_0_PIX0_MASK;
667 		if (enable)
668 			val |= ISPIF_VFE_m_IRQ_MASK_0_PIX0_ENABLE;
669 		writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_0(vfe));
670 		writel_relaxed(ISPIF_VFE_m_IRQ_MASK_0_PIX0_ENABLE,
671 			       ispif->base + ISPIF_VFE_m_IRQ_CLEAR_0(vfe));
672 		break;
673 	case RDI0:
674 		val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_0(vfe));
675 		val &= ~ISPIF_VFE_m_IRQ_MASK_0_RDI0_MASK;
676 		if (enable)
677 			val |= ISPIF_VFE_m_IRQ_MASK_0_RDI0_ENABLE;
678 		writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_0(vfe));
679 		writel_relaxed(ISPIF_VFE_m_IRQ_MASK_0_RDI0_ENABLE,
680 			       ispif->base + ISPIF_VFE_m_IRQ_CLEAR_0(vfe));
681 		break;
682 	case PIX1:
683 		val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_1(vfe));
684 		val &= ~ISPIF_VFE_m_IRQ_MASK_1_PIX1_MASK;
685 		if (enable)
686 			val |= ISPIF_VFE_m_IRQ_MASK_1_PIX1_ENABLE;
687 		writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_1(vfe));
688 		writel_relaxed(ISPIF_VFE_m_IRQ_MASK_1_PIX1_ENABLE,
689 			       ispif->base + ISPIF_VFE_m_IRQ_CLEAR_1(vfe));
690 		break;
691 	case RDI1:
692 		val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_1(vfe));
693 		val &= ~ISPIF_VFE_m_IRQ_MASK_1_RDI1_MASK;
694 		if (enable)
695 			val |= ISPIF_VFE_m_IRQ_MASK_1_RDI1_ENABLE;
696 		writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_1(vfe));
697 		writel_relaxed(ISPIF_VFE_m_IRQ_MASK_1_RDI1_ENABLE,
698 			       ispif->base + ISPIF_VFE_m_IRQ_CLEAR_1(vfe));
699 		break;
700 	case RDI2:
701 		val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_2(vfe));
702 		val &= ~ISPIF_VFE_m_IRQ_MASK_2_RDI2_MASK;
703 		if (enable)
704 			val |= ISPIF_VFE_m_IRQ_MASK_2_RDI2_ENABLE;
705 		writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_2(vfe));
706 		writel_relaxed(ISPIF_VFE_m_IRQ_MASK_2_RDI2_ENABLE,
707 			       ispif->base + ISPIF_VFE_m_IRQ_CLEAR_2(vfe));
708 		break;
709 	}
710 
711 	writel(0x1, ispif->base + ISPIF_IRQ_GLOBAL_CLEAR_CMD);
712 }
713 
714 /*
715  * ispif_config_pack - Config packing for PRDI mode
716  * @ispif: ISPIF device
717  * @code: media bus format code
718  * @intf: VFE interface
719  * @cid: desired CID to handle
720  * @vfe: VFE HW module id
721  * @enable: enable or disable
722  */
723 static void ispif_config_pack(struct ispif_device *ispif, u32 code,
724 			      enum ispif_intf intf, u8 cid, u8 vfe, u8 enable)
725 {
726 	u32 addr, val;
727 
728 	if (code != MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE &&
729 	    code != MEDIA_BUS_FMT_Y10_2X8_PADHI_LE)
730 		return;
731 
732 	switch (intf) {
733 	case RDI0:
734 		if (cid < 8)
735 			addr = ISPIF_VFE_m_RDI_INTF_n_PACK_CFG_0(vfe, 0);
736 		else
737 			addr = ISPIF_VFE_m_RDI_INTF_n_PACK_CFG_1(vfe, 0);
738 		break;
739 	case RDI1:
740 		if (cid < 8)
741 			addr = ISPIF_VFE_m_RDI_INTF_n_PACK_CFG_0(vfe, 1);
742 		else
743 			addr = ISPIF_VFE_m_RDI_INTF_n_PACK_CFG_1(vfe, 1);
744 		break;
745 	case RDI2:
746 		if (cid < 8)
747 			addr = ISPIF_VFE_m_RDI_INTF_n_PACK_CFG_0(vfe, 2);
748 		else
749 			addr = ISPIF_VFE_m_RDI_INTF_n_PACK_CFG_1(vfe, 2);
750 		break;
751 	default:
752 		return;
753 	}
754 
755 	if (enable)
756 		val = ISPIF_VFE_m_RDI_INTF_n_PACK_CFG_0_CID_c_PLAIN(cid);
757 	else
758 		val = 0;
759 
760 	writel_relaxed(val, ispif->base + addr);
761 }
762 
763 /*
764  * ispif_set_intf_cmd - Set command to enable/disable interface
765  * @ispif: ISPIF device
766  * @cmd: interface command
767  * @intf: VFE interface
768  * @vfe: VFE HW module id
769  * @vc: virtual channel
770  */
771 static void ispif_set_intf_cmd(struct ispif_device *ispif, u8 cmd,
772 			       enum ispif_intf intf, u8 vfe, u8 vc)
773 {
774 	u32 *val;
775 
776 	if (intf == RDI2) {
777 		val = &ispif->intf_cmd[vfe].cmd_1;
778 		*val &= ~(0x3 << (vc * 2 + 8));
779 		*val |= (cmd << (vc * 2 + 8));
780 		wmb();
781 		writel_relaxed(*val, ispif->base + ISPIF_VFE_m_INTF_CMD_1(vfe));
782 		wmb();
783 	} else {
784 		val = &ispif->intf_cmd[vfe].cmd_0;
785 		*val &= ~(0x3 << (vc * 2 + intf * 8));
786 		*val |= (cmd << (vc * 2 + intf * 8));
787 		wmb();
788 		writel_relaxed(*val, ispif->base + ISPIF_VFE_m_INTF_CMD_0(vfe));
789 		wmb();
790 	}
791 }
792 
793 /*
794  * ispif_set_stream - Enable/disable streaming on ISPIF module
795  * @sd: ISPIF V4L2 subdevice
796  * @enable: Requested streaming state
797  *
798  * Main configuration of ISPIF module is also done here.
799  *
800  * Return 0 on success or a negative error code otherwise
801  */
802 static int ispif_set_stream(struct v4l2_subdev *sd, int enable)
803 {
804 	struct ispif_line *line = v4l2_get_subdevdata(sd);
805 	struct ispif_device *ispif = line->ispif;
806 	struct camss *camss = ispif->camss;
807 	enum ispif_intf intf = line->interface;
808 	u8 csid = line->csid_id;
809 	u8 vfe = line->vfe_id;
810 	u8 vc = 0; /* Virtual Channel 0 */
811 	u8 cid = vc * 4; /* id of Virtual Channel and Data Type set */
812 	int ret;
813 
814 	if (enable) {
815 		if (!media_entity_remote_pad(&line->pads[MSM_ISPIF_PAD_SINK]))
816 			return -ENOLINK;
817 
818 		/* Config */
819 
820 		mutex_lock(&ispif->config_lock);
821 		ispif_select_clk_mux(ispif, intf, csid, vfe, 1);
822 
823 		ret = ispif_validate_intf_status(ispif, intf, vfe);
824 		if (ret < 0) {
825 			mutex_unlock(&ispif->config_lock);
826 			return ret;
827 		}
828 
829 		ispif_select_csid(ispif, intf, csid, vfe, 1);
830 		ispif_select_cid(ispif, intf, cid, vfe, 1);
831 		ispif_config_irq(ispif, intf, vfe, 1);
832 		if (camss->version == CAMSS_8x96 ||
833 		    camss->version == CAMSS_660)
834 			ispif_config_pack(ispif,
835 					  line->fmt[MSM_ISPIF_PAD_SINK].code,
836 					  intf, cid, vfe, 1);
837 		ispif_set_intf_cmd(ispif, CMD_ENABLE_FRAME_BOUNDARY,
838 				   intf, vfe, vc);
839 	} else {
840 		mutex_lock(&ispif->config_lock);
841 		ispif_set_intf_cmd(ispif, CMD_DISABLE_FRAME_BOUNDARY,
842 				   intf, vfe, vc);
843 		mutex_unlock(&ispif->config_lock);
844 
845 		ret = ispif_wait_for_stop(ispif, intf, vfe);
846 		if (ret < 0)
847 			return ret;
848 
849 		mutex_lock(&ispif->config_lock);
850 		if (camss->version == CAMSS_8x96 ||
851 		    camss->version == CAMSS_660)
852 			ispif_config_pack(ispif,
853 					  line->fmt[MSM_ISPIF_PAD_SINK].code,
854 					  intf, cid, vfe, 0);
855 		ispif_config_irq(ispif, intf, vfe, 0);
856 		ispif_select_cid(ispif, intf, cid, vfe, 0);
857 		ispif_select_csid(ispif, intf, csid, vfe, 0);
858 		ispif_select_clk_mux(ispif, intf, csid, vfe, 0);
859 	}
860 
861 	mutex_unlock(&ispif->config_lock);
862 
863 	return 0;
864 }
865 
866 /*
867  * __ispif_get_format - Get pointer to format structure
868  * @ispif: ISPIF line
869  * @cfg: V4L2 subdev pad configuration
870  * @pad: pad from which format is requested
871  * @which: TRY or ACTIVE format
872  *
873  * Return pointer to TRY or ACTIVE format structure
874  */
875 static struct v4l2_mbus_framefmt *
876 __ispif_get_format(struct ispif_line *line,
877 		   struct v4l2_subdev_state *sd_state,
878 		   unsigned int pad,
879 		   enum v4l2_subdev_format_whence which)
880 {
881 	if (which == V4L2_SUBDEV_FORMAT_TRY)
882 		return v4l2_subdev_get_try_format(&line->subdev, sd_state,
883 						  pad);
884 
885 	return &line->fmt[pad];
886 }
887 
888 /*
889  * ispif_try_format - Handle try format by pad subdev method
890  * @ispif: ISPIF line
891  * @cfg: V4L2 subdev pad configuration
892  * @pad: pad on which format is requested
893  * @fmt: pointer to v4l2 format structure
894  * @which: wanted subdev format
895  */
896 static void ispif_try_format(struct ispif_line *line,
897 			     struct v4l2_subdev_state *sd_state,
898 			     unsigned int pad,
899 			     struct v4l2_mbus_framefmt *fmt,
900 			     enum v4l2_subdev_format_whence which)
901 {
902 	unsigned int i;
903 
904 	switch (pad) {
905 	case MSM_ISPIF_PAD_SINK:
906 		/* Set format on sink pad */
907 
908 		for (i = 0; i < line->nformats; i++)
909 			if (fmt->code == line->formats[i])
910 				break;
911 
912 		/* If not found, use UYVY as default */
913 		if (i >= line->nformats)
914 			fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
915 
916 		fmt->width = clamp_t(u32, fmt->width, 1, 8191);
917 		fmt->height = clamp_t(u32, fmt->height, 1, 8191);
918 
919 		fmt->field = V4L2_FIELD_NONE;
920 		fmt->colorspace = V4L2_COLORSPACE_SRGB;
921 
922 		break;
923 
924 	case MSM_ISPIF_PAD_SRC:
925 		/* Set and return a format same as sink pad */
926 
927 		*fmt = *__ispif_get_format(line, sd_state, MSM_ISPIF_PAD_SINK,
928 					   which);
929 
930 		break;
931 	}
932 
933 	fmt->colorspace = V4L2_COLORSPACE_SRGB;
934 }
935 
936 /*
937  * ispif_enum_mbus_code - Handle pixel format enumeration
938  * @sd: ISPIF V4L2 subdevice
939  * @cfg: V4L2 subdev pad configuration
940  * @code: pointer to v4l2_subdev_mbus_code_enum structure
941  * return -EINVAL or zero on success
942  */
943 static int ispif_enum_mbus_code(struct v4l2_subdev *sd,
944 				struct v4l2_subdev_state *sd_state,
945 				struct v4l2_subdev_mbus_code_enum *code)
946 {
947 	struct ispif_line *line = v4l2_get_subdevdata(sd);
948 	struct v4l2_mbus_framefmt *format;
949 
950 	if (code->pad == MSM_ISPIF_PAD_SINK) {
951 		if (code->index >= line->nformats)
952 			return -EINVAL;
953 
954 		code->code = line->formats[code->index];
955 	} else {
956 		if (code->index > 0)
957 			return -EINVAL;
958 
959 		format = __ispif_get_format(line, sd_state,
960 					    MSM_ISPIF_PAD_SINK,
961 					    code->which);
962 
963 		code->code = format->code;
964 	}
965 
966 	return 0;
967 }
968 
969 /*
970  * ispif_enum_frame_size - Handle frame size enumeration
971  * @sd: ISPIF V4L2 subdevice
972  * @cfg: V4L2 subdev pad configuration
973  * @fse: pointer to v4l2_subdev_frame_size_enum structure
974  * return -EINVAL or zero on success
975  */
976 static int ispif_enum_frame_size(struct v4l2_subdev *sd,
977 				 struct v4l2_subdev_state *sd_state,
978 				 struct v4l2_subdev_frame_size_enum *fse)
979 {
980 	struct ispif_line *line = v4l2_get_subdevdata(sd);
981 	struct v4l2_mbus_framefmt format;
982 
983 	if (fse->index != 0)
984 		return -EINVAL;
985 
986 	format.code = fse->code;
987 	format.width = 1;
988 	format.height = 1;
989 	ispif_try_format(line, sd_state, fse->pad, &format, fse->which);
990 	fse->min_width = format.width;
991 	fse->min_height = format.height;
992 
993 	if (format.code != fse->code)
994 		return -EINVAL;
995 
996 	format.code = fse->code;
997 	format.width = -1;
998 	format.height = -1;
999 	ispif_try_format(line, sd_state, fse->pad, &format, fse->which);
1000 	fse->max_width = format.width;
1001 	fse->max_height = format.height;
1002 
1003 	return 0;
1004 }
1005 
1006 /*
1007  * ispif_get_format - Handle get format by pads subdev method
1008  * @sd: ISPIF V4L2 subdevice
1009  * @cfg: V4L2 subdev pad configuration
1010  * @fmt: pointer to v4l2 subdev format structure
1011  *
1012  * Return -EINVAL or zero on success
1013  */
1014 static int ispif_get_format(struct v4l2_subdev *sd,
1015 			    struct v4l2_subdev_state *sd_state,
1016 			    struct v4l2_subdev_format *fmt)
1017 {
1018 	struct ispif_line *line = v4l2_get_subdevdata(sd);
1019 	struct v4l2_mbus_framefmt *format;
1020 
1021 	format = __ispif_get_format(line, sd_state, fmt->pad, fmt->which);
1022 	if (format == NULL)
1023 		return -EINVAL;
1024 
1025 	fmt->format = *format;
1026 
1027 	return 0;
1028 }
1029 
1030 /*
1031  * ispif_set_format - Handle set format by pads subdev method
1032  * @sd: ISPIF V4L2 subdevice
1033  * @cfg: V4L2 subdev pad configuration
1034  * @fmt: pointer to v4l2 subdev format structure
1035  *
1036  * Return -EINVAL or zero on success
1037  */
1038 static int ispif_set_format(struct v4l2_subdev *sd,
1039 			    struct v4l2_subdev_state *sd_state,
1040 			    struct v4l2_subdev_format *fmt)
1041 {
1042 	struct ispif_line *line = v4l2_get_subdevdata(sd);
1043 	struct v4l2_mbus_framefmt *format;
1044 
1045 	format = __ispif_get_format(line, sd_state, fmt->pad, fmt->which);
1046 	if (format == NULL)
1047 		return -EINVAL;
1048 
1049 	ispif_try_format(line, sd_state, fmt->pad, &fmt->format, fmt->which);
1050 	*format = fmt->format;
1051 
1052 	/* Propagate the format from sink to source */
1053 	if (fmt->pad == MSM_ISPIF_PAD_SINK) {
1054 		format = __ispif_get_format(line, sd_state, MSM_ISPIF_PAD_SRC,
1055 					    fmt->which);
1056 
1057 		*format = fmt->format;
1058 		ispif_try_format(line, sd_state, MSM_ISPIF_PAD_SRC, format,
1059 				 fmt->which);
1060 	}
1061 
1062 	return 0;
1063 }
1064 
1065 /*
1066  * ispif_init_formats - Initialize formats on all pads
1067  * @sd: ISPIF V4L2 subdevice
1068  * @fh: V4L2 subdev file handle
1069  *
1070  * Initialize all pad formats with default values.
1071  *
1072  * Return 0 on success or a negative error code otherwise
1073  */
1074 static int ispif_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1075 {
1076 	struct v4l2_subdev_format format = {
1077 		.pad = MSM_ISPIF_PAD_SINK,
1078 		.which = fh ? V4L2_SUBDEV_FORMAT_TRY :
1079 			      V4L2_SUBDEV_FORMAT_ACTIVE,
1080 		.format = {
1081 			.code = MEDIA_BUS_FMT_UYVY8_2X8,
1082 			.width = 1920,
1083 			.height = 1080
1084 		}
1085 	};
1086 
1087 	return ispif_set_format(sd, fh ? fh->state : NULL, &format);
1088 }
1089 
1090 /*
1091  * msm_ispif_subdev_init - Initialize ISPIF device structure and resources
1092  * @ispif: ISPIF device
1093  * @res: ISPIF module resources table
1094  *
1095  * Return 0 on success or a negative error code otherwise
1096  */
1097 int msm_ispif_subdev_init(struct camss *camss,
1098 			  const struct resources_ispif *res)
1099 {
1100 	struct device *dev = camss->dev;
1101 	struct ispif_device *ispif = camss->ispif;
1102 	struct platform_device *pdev = to_platform_device(dev);
1103 	int i;
1104 	int ret;
1105 
1106 	if (!camss->ispif)
1107 		return 0;
1108 
1109 	ispif->camss = camss;
1110 
1111 	/* Number of ISPIF lines - same as number of CSID hardware modules */
1112 	if (camss->version == CAMSS_8x16)
1113 		ispif->line_num = 2;
1114 	else if (camss->version == CAMSS_8x96 ||
1115 		 camss->version == CAMSS_660)
1116 		ispif->line_num = 4;
1117 	else
1118 		return -EINVAL;
1119 
1120 	ispif->line = devm_kcalloc(dev, ispif->line_num,
1121 				   sizeof(*ispif->line), GFP_KERNEL);
1122 	if (!ispif->line)
1123 		return -ENOMEM;
1124 
1125 	for (i = 0; i < ispif->line_num; i++) {
1126 		ispif->line[i].ispif = ispif;
1127 		ispif->line[i].id = i;
1128 
1129 		if (camss->version == CAMSS_8x16) {
1130 			ispif->line[i].formats = ispif_formats_8x16;
1131 			ispif->line[i].nformats =
1132 					ARRAY_SIZE(ispif_formats_8x16);
1133 		} else if (camss->version == CAMSS_8x96 ||
1134 			   camss->version == CAMSS_660) {
1135 			ispif->line[i].formats = ispif_formats_8x96;
1136 			ispif->line[i].nformats =
1137 					ARRAY_SIZE(ispif_formats_8x96);
1138 		} else {
1139 			return -EINVAL;
1140 		}
1141 	}
1142 
1143 	/* Memory */
1144 
1145 	ispif->base = devm_platform_ioremap_resource_byname(pdev, res->reg[0]);
1146 	if (IS_ERR(ispif->base))
1147 		return PTR_ERR(ispif->base);
1148 
1149 	ispif->base_clk_mux = devm_platform_ioremap_resource_byname(pdev, res->reg[1]);
1150 	if (IS_ERR(ispif->base_clk_mux))
1151 		return PTR_ERR(ispif->base_clk_mux);
1152 
1153 	/* Interrupt */
1154 
1155 	ret = platform_get_irq_byname(pdev, res->interrupt);
1156 	if (ret < 0)
1157 		return ret;
1158 
1159 	ispif->irq = ret;
1160 	snprintf(ispif->irq_name, sizeof(ispif->irq_name), "%s_%s",
1161 		 dev_name(dev), MSM_ISPIF_NAME);
1162 	if (camss->version == CAMSS_8x16)
1163 		ret = devm_request_irq(dev, ispif->irq, ispif_isr_8x16,
1164 			       IRQF_TRIGGER_RISING, ispif->irq_name, ispif);
1165 	else if (camss->version == CAMSS_8x96 ||
1166 		 camss->version == CAMSS_660)
1167 		ret = devm_request_irq(dev, ispif->irq, ispif_isr_8x96,
1168 			       IRQF_TRIGGER_RISING, ispif->irq_name, ispif);
1169 	else
1170 		ret = -EINVAL;
1171 
1172 	if (ret < 0) {
1173 		dev_err(dev, "request_irq failed: %d\n", ret);
1174 		return ret;
1175 	}
1176 
1177 	/* Clocks */
1178 
1179 	ispif->nclocks = 0;
1180 	while (res->clock[ispif->nclocks])
1181 		ispif->nclocks++;
1182 
1183 	ispif->clock = devm_kcalloc(dev,
1184 				    ispif->nclocks, sizeof(*ispif->clock),
1185 				    GFP_KERNEL);
1186 	if (!ispif->clock)
1187 		return -ENOMEM;
1188 
1189 	for (i = 0; i < ispif->nclocks; i++) {
1190 		struct camss_clock *clock = &ispif->clock[i];
1191 
1192 		clock->clk = devm_clk_get(dev, res->clock[i]);
1193 		if (IS_ERR(clock->clk))
1194 			return PTR_ERR(clock->clk);
1195 
1196 		clock->freq = NULL;
1197 		clock->nfreqs = 0;
1198 	}
1199 
1200 	ispif->nclocks_for_reset = 0;
1201 	while (res->clock_for_reset[ispif->nclocks_for_reset])
1202 		ispif->nclocks_for_reset++;
1203 
1204 	ispif->clock_for_reset = devm_kcalloc(dev,
1205 					      ispif->nclocks_for_reset,
1206 					      sizeof(*ispif->clock_for_reset),
1207 					      GFP_KERNEL);
1208 	if (!ispif->clock_for_reset)
1209 		return -ENOMEM;
1210 
1211 	for (i = 0; i < ispif->nclocks_for_reset; i++) {
1212 		struct camss_clock *clock = &ispif->clock_for_reset[i];
1213 
1214 		clock->clk = devm_clk_get(dev, res->clock_for_reset[i]);
1215 		if (IS_ERR(clock->clk))
1216 			return PTR_ERR(clock->clk);
1217 
1218 		clock->freq = NULL;
1219 		clock->nfreqs = 0;
1220 	}
1221 
1222 	mutex_init(&ispif->power_lock);
1223 	ispif->power_count = 0;
1224 
1225 	mutex_init(&ispif->config_lock);
1226 
1227 	for (i = 0; i < MSM_ISPIF_VFE_NUM; i++)
1228 		init_completion(&ispif->reset_complete[i]);
1229 
1230 	return 0;
1231 }
1232 
1233 /*
1234  * ispif_get_intf - Get ISPIF interface to use by VFE line id
1235  * @line_id: VFE line id that the ISPIF line is connected to
1236  *
1237  * Return ISPIF interface to use
1238  */
1239 static enum ispif_intf ispif_get_intf(enum vfe_line_id line_id)
1240 {
1241 	switch (line_id) {
1242 	case (VFE_LINE_RDI0):
1243 		return RDI0;
1244 	case (VFE_LINE_RDI1):
1245 		return RDI1;
1246 	case (VFE_LINE_RDI2):
1247 		return RDI2;
1248 	case (VFE_LINE_PIX):
1249 		return PIX0;
1250 	default:
1251 		return RDI0;
1252 	}
1253 }
1254 
1255 /*
1256  * ispif_link_setup - Setup ISPIF connections
1257  * @entity: Pointer to media entity structure
1258  * @local: Pointer to local pad
1259  * @remote: Pointer to remote pad
1260  * @flags: Link flags
1261  *
1262  * Return 0 on success
1263  */
1264 static int ispif_link_setup(struct media_entity *entity,
1265 			    const struct media_pad *local,
1266 			    const struct media_pad *remote, u32 flags)
1267 {
1268 	if (flags & MEDIA_LNK_FL_ENABLED) {
1269 		if (media_entity_remote_pad(local))
1270 			return -EBUSY;
1271 
1272 		if (local->flags & MEDIA_PAD_FL_SINK) {
1273 			struct v4l2_subdev *sd;
1274 			struct ispif_line *line;
1275 
1276 			sd = media_entity_to_v4l2_subdev(entity);
1277 			line = v4l2_get_subdevdata(sd);
1278 
1279 			msm_csid_get_csid_id(remote->entity, &line->csid_id);
1280 		} else { /* MEDIA_PAD_FL_SOURCE */
1281 			struct v4l2_subdev *sd;
1282 			struct ispif_line *line;
1283 			enum vfe_line_id id;
1284 
1285 			sd = media_entity_to_v4l2_subdev(entity);
1286 			line = v4l2_get_subdevdata(sd);
1287 
1288 			msm_vfe_get_vfe_id(remote->entity, &line->vfe_id);
1289 			msm_vfe_get_vfe_line_id(remote->entity, &id);
1290 			line->interface = ispif_get_intf(id);
1291 		}
1292 	}
1293 
1294 	return 0;
1295 }
1296 
1297 static const struct v4l2_subdev_core_ops ispif_core_ops = {
1298 	.s_power = ispif_set_power,
1299 };
1300 
1301 static const struct v4l2_subdev_video_ops ispif_video_ops = {
1302 	.s_stream = ispif_set_stream,
1303 };
1304 
1305 static const struct v4l2_subdev_pad_ops ispif_pad_ops = {
1306 	.enum_mbus_code = ispif_enum_mbus_code,
1307 	.enum_frame_size = ispif_enum_frame_size,
1308 	.get_fmt = ispif_get_format,
1309 	.set_fmt = ispif_set_format,
1310 };
1311 
1312 static const struct v4l2_subdev_ops ispif_v4l2_ops = {
1313 	.core = &ispif_core_ops,
1314 	.video = &ispif_video_ops,
1315 	.pad = &ispif_pad_ops,
1316 };
1317 
1318 static const struct v4l2_subdev_internal_ops ispif_v4l2_internal_ops = {
1319 	.open = ispif_init_formats,
1320 };
1321 
1322 static const struct media_entity_operations ispif_media_ops = {
1323 	.link_setup = ispif_link_setup,
1324 	.link_validate = v4l2_subdev_link_validate,
1325 };
1326 
1327 /*
1328  * msm_ispif_register_entities - Register subdev node for ISPIF module
1329  * @ispif: ISPIF device
1330  * @v4l2_dev: V4L2 device
1331  *
1332  * Return 0 on success or a negative error code otherwise
1333  */
1334 int msm_ispif_register_entities(struct ispif_device *ispif,
1335 				struct v4l2_device *v4l2_dev)
1336 {
1337 	struct camss *camss;
1338 	int ret;
1339 	int i;
1340 
1341 	if (!ispif)
1342 		return 0;
1343 
1344 	camss = ispif->camss;
1345 
1346 	for (i = 0; i < ispif->line_num; i++) {
1347 		struct v4l2_subdev *sd = &ispif->line[i].subdev;
1348 		struct media_pad *pads = ispif->line[i].pads;
1349 
1350 		v4l2_subdev_init(sd, &ispif_v4l2_ops);
1351 		sd->internal_ops = &ispif_v4l2_internal_ops;
1352 		sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1353 		snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d",
1354 			 MSM_ISPIF_NAME, i);
1355 		v4l2_set_subdevdata(sd, &ispif->line[i]);
1356 
1357 		ret = ispif_init_formats(sd, NULL);
1358 		if (ret < 0) {
1359 			dev_err(camss->dev, "Failed to init format: %d\n", ret);
1360 			goto error;
1361 		}
1362 
1363 		pads[MSM_ISPIF_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1364 		pads[MSM_ISPIF_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
1365 
1366 		sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
1367 		sd->entity.ops = &ispif_media_ops;
1368 		ret = media_entity_pads_init(&sd->entity, MSM_ISPIF_PADS_NUM,
1369 					     pads);
1370 		if (ret < 0) {
1371 			dev_err(camss->dev, "Failed to init media entity: %d\n",
1372 				ret);
1373 			goto error;
1374 		}
1375 
1376 		ret = v4l2_device_register_subdev(v4l2_dev, sd);
1377 		if (ret < 0) {
1378 			dev_err(camss->dev, "Failed to register subdev: %d\n",
1379 				ret);
1380 			media_entity_cleanup(&sd->entity);
1381 			goto error;
1382 		}
1383 	}
1384 
1385 	return 0;
1386 
1387 error:
1388 	for (i--; i >= 0; i--) {
1389 		struct v4l2_subdev *sd = &ispif->line[i].subdev;
1390 
1391 		v4l2_device_unregister_subdev(sd);
1392 		media_entity_cleanup(&sd->entity);
1393 	}
1394 
1395 	return ret;
1396 }
1397 
1398 /*
1399  * msm_ispif_unregister_entities - Unregister ISPIF module subdev node
1400  * @ispif: ISPIF device
1401  */
1402 void msm_ispif_unregister_entities(struct ispif_device *ispif)
1403 {
1404 	int i;
1405 
1406 	if (!ispif)
1407 		return;
1408 
1409 	mutex_destroy(&ispif->power_lock);
1410 	mutex_destroy(&ispif->config_lock);
1411 
1412 	for (i = 0; i < ispif->line_num; i++) {
1413 		struct v4l2_subdev *sd = &ispif->line[i].subdev;
1414 
1415 		v4l2_device_unregister_subdev(sd);
1416 		media_entity_cleanup(&sd->entity);
1417 	}
1418 }
1419