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