1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright 2019-2020 NXP
4  */
5 
6 #include <linux/debugfs.h>
7 #include <linux/device.h>
8 #include <linux/io.h>
9 #include <linux/kernel.h>
10 #include <linux/pm_runtime.h>
11 #include <linux/seq_file.h>
12 #include <linux/types.h>
13 
14 #include "imx8-isi-core.h"
15 #include "imx8-isi-regs.h"
16 
17 static inline u32 mxc_isi_read(struct mxc_isi_pipe *pipe, u32 reg)
18 {
19 	return readl(pipe->regs + reg);
20 }
21 
22 static int mxc_isi_debug_dump_regs_show(struct seq_file *m, void *p)
23 {
24 #define MXC_ISI_DEBUG_REG(name)		{ name, #name }
25 	static const struct {
26 		u32 offset;
27 		const char * const name;
28 	} registers[] = {
29 		MXC_ISI_DEBUG_REG(CHNL_CTRL),
30 		MXC_ISI_DEBUG_REG(CHNL_IMG_CTRL),
31 		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF_CTRL),
32 		MXC_ISI_DEBUG_REG(CHNL_IMG_CFG),
33 		MXC_ISI_DEBUG_REG(CHNL_IER),
34 		MXC_ISI_DEBUG_REG(CHNL_STS),
35 		MXC_ISI_DEBUG_REG(CHNL_SCALE_FACTOR),
36 		MXC_ISI_DEBUG_REG(CHNL_SCALE_OFFSET),
37 		MXC_ISI_DEBUG_REG(CHNL_CROP_ULC),
38 		MXC_ISI_DEBUG_REG(CHNL_CROP_LRC),
39 		MXC_ISI_DEBUG_REG(CHNL_CSC_COEFF0),
40 		MXC_ISI_DEBUG_REG(CHNL_CSC_COEFF1),
41 		MXC_ISI_DEBUG_REG(CHNL_CSC_COEFF2),
42 		MXC_ISI_DEBUG_REG(CHNL_CSC_COEFF3),
43 		MXC_ISI_DEBUG_REG(CHNL_CSC_COEFF4),
44 		MXC_ISI_DEBUG_REG(CHNL_CSC_COEFF5),
45 		MXC_ISI_DEBUG_REG(CHNL_ROI_0_ALPHA),
46 		MXC_ISI_DEBUG_REG(CHNL_ROI_0_ULC),
47 		MXC_ISI_DEBUG_REG(CHNL_ROI_0_LRC),
48 		MXC_ISI_DEBUG_REG(CHNL_ROI_1_ALPHA),
49 		MXC_ISI_DEBUG_REG(CHNL_ROI_1_ULC),
50 		MXC_ISI_DEBUG_REG(CHNL_ROI_1_LRC),
51 		MXC_ISI_DEBUG_REG(CHNL_ROI_2_ALPHA),
52 		MXC_ISI_DEBUG_REG(CHNL_ROI_2_ULC),
53 		MXC_ISI_DEBUG_REG(CHNL_ROI_2_LRC),
54 		MXC_ISI_DEBUG_REG(CHNL_ROI_3_ALPHA),
55 		MXC_ISI_DEBUG_REG(CHNL_ROI_3_ULC),
56 		MXC_ISI_DEBUG_REG(CHNL_ROI_3_LRC),
57 		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF1_ADDR_Y),
58 		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF1_ADDR_U),
59 		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF1_ADDR_V),
60 		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF_PITCH),
61 		MXC_ISI_DEBUG_REG(CHNL_IN_BUF_ADDR),
62 		MXC_ISI_DEBUG_REG(CHNL_IN_BUF_PITCH),
63 		MXC_ISI_DEBUG_REG(CHNL_MEM_RD_CTRL),
64 		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF2_ADDR_Y),
65 		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF2_ADDR_U),
66 		MXC_ISI_DEBUG_REG(CHNL_OUT_BUF2_ADDR_V),
67 		MXC_ISI_DEBUG_REG(CHNL_SCL_IMG_CFG),
68 		MXC_ISI_DEBUG_REG(CHNL_FLOW_CTRL),
69 	};
70 
71 	struct mxc_isi_pipe *pipe = m->private;
72 	unsigned int i;
73 
74 	if (!pm_runtime_get_if_in_use(pipe->isi->dev))
75 		return 0;
76 
77 	seq_printf(m, "--- ISI pipe %u registers ---\n", pipe->id);
78 
79 	for (i = 0; i < ARRAY_SIZE(registers); ++i)
80 		seq_printf(m, "%20s[0x%02x]: 0x%08x\n",
81 			   registers[i].name, registers[i].offset,
82 			   mxc_isi_read(pipe, registers[i].offset));
83 
84 	pm_runtime_put(pipe->isi->dev);
85 
86 	return 0;
87 }
88 DEFINE_SHOW_ATTRIBUTE(mxc_isi_debug_dump_regs);
89 
90 void mxc_isi_debug_init(struct mxc_isi_dev *isi)
91 {
92 	unsigned int i;
93 
94 	isi->debugfs_root = debugfs_create_dir(dev_name(isi->dev), NULL);
95 
96 	for (i = 0; i < isi->pdata->num_channels; ++i) {
97 		struct mxc_isi_pipe *pipe = &isi->pipes[i];
98 		char name[8];
99 
100 		sprintf(name, "pipe%u", pipe->id);
101 		debugfs_create_file(name, 0444, isi->debugfs_root, pipe,
102 				    &mxc_isi_debug_dump_regs_fops);
103 	}
104 }
105 
106 void mxc_isi_debug_cleanup(struct mxc_isi_dev *isi)
107 {
108 	debugfs_remove_recursive(isi->debugfs_root);
109 }
110