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lztmfx

@shz18877605430 在 T113 切换存储，nand flash切换到SD卡启动，挂载文件系统报错中说：

rootfstype=squashfs

rootfstype=ext4

lztmfx

T113S3使用NCS8801 LVDS转EDP芯片，需要LCD驱动里面通过I2C初始化NCS8801，但是实际测试发现，tina linux的i2c晚于disp驱动加载，这样disp驱动里面获取不到有效的i2c适配器。有什么方法让i2c在disp前加载？另外看别的帖子说不建议在disp里面用硬件i2c初始化，推荐用GPIO模拟，看了SDK里面ST7789V也是用GPIO模拟SPI，但是SPI write的时候，引脚的输入输出是固定的，不用切换引脚状态，但是I2C的SDA引脚在发送完数据后需要切换为input模式来接收ACK信号的，这样如果用lcd设备树里面的这种方式是不行的吧？这个还可以在disp驱动里面通过代码切换lcd_gpio_X的参数吗？如输入改为输出。

lcd_gpio_0 = <&pio PG 12 1 0 3 0>;
lcd_gpio_1 = <&pio PG 13 1 0 3 0>;

如果直接在disp驱动使用下面这种方式：

#define I2C_SCL  204
#define I2C_SDA  205
#define I2C_SCL_LOW()  gpio_set_value(I2C_SCL, 0)
#define I2C_SDA_HIGH() gpio_direction_output(I2C_SDA, 1)

开机会有一堆报错

[    0.650948] 8<--- cut here ---
[    0.650952] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[    0.650960] pgd = (ptrval)
[    0.658090] uart3: ttyS3 at MMIO 0x2500c00 (irq = 35, base_baud = 1500000) is a SUNXI
▒▒  0.660901] [00000000] *pgd=00000000
[    0.669008] sw_console_setup()1807 - console setup baud 115200 parity n bits 8, flow n
[    0.671684] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[    0.696238] Modules linked in:
[    0.696238] Modules linked in:
[    0.696249] CPU: 0 PID: 21 Comm: kworker/0:1 Not tainted 5.4.61 #159
[    0.696249] CPU: 0 PID: 21 Comm: kworker/0:1 Not tainted 5.4.61 #159
[    0.696256] Hardware name: Generic DT based system
[    0.696256] Hardware name: Generic DT based system
[    0.702736] printk: console [ttyS3] enabled
[    0.702736] printk: console [ttyS3] enabled
[    0.716144] Workqueue: events start_work
[    0.716144] Workqueue: events start_work
[    0.716154] PC is at LCD_panel_init+0x44/0x13c
[    0.716154] PC is at LCD_panel_init+0x44/0x13c
[    0.716162] LR is at LCD_panel_init+0x40/0x13c
[    0.716162] LR is at LCD_panel_init+0x40/0x13c
[    0.726281] printk: bootconsole [earlycon0] disabled
[    0.726281] printk: bootconsole [earlycon0] disabled
[    0.735110] pc : [<c03962cc>]    lr : [<c03962c8>]    psr: 60000013
[    0.735110] pc : [<c03962cc>]    lr : [<c03962c8>]    psr: 60000013
[    0.735114] sp : c714de20  ip : 00000000  fp : 00000000
[    0.735114] sp : c714de20  ip : 00000000  fp : 00000000
[    0.735117] r10: 00000001  r9 : 00000000  r8 : c0b1bb66
[    0.735117] r10: 00000001  r9 : 00000000  r8 : c0b1bb66
[    0.735124] r7 : c0b1bb50  r6 : 00000000  r5 : 0000000b  r4 : c714c000
[    0.735124] r7 : c0b1bb50  r6 : 00000000  r5 : 0000000b  r4 : c714c000
[    0.821770] r3 : 50ca96b2  r2 : 50ca96b2  r1 : 06c7e000  r0 : 00000026
[    0.821776] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
[    0.821783] Control: 10c5387d  Table: 4000406a  DAC: 00000051
[    0.829589] sun8iw20-pinctrl 2000000.pinctrl: 2000000.pinctrl supply vcc-pb not found, using dummy regulator
[    0.837001] Process kworker/0:1 (pid: 21, stack limit = 0x(ptrval))
[    0.837006] Stack: (0xc714de20 to 0xc714e000)
[    0.837017] de20: 00000000 50ca96b2 c730fa00 c7391000 c7390000 00000001 c0c5d028 c0373c88
[    0.837032] de40: c08272ba c730fa00 c714de98 c07248e0 00000000 00000000 00000000 c036dcf4
[    0.843742] uart uart4: uart4 supply uart not found, using dummy regulator
[    0.854390] de60: 00000000 00000000 00020002 c714de6c c714de6c 50ca96b2 c7070c00 c06ea2ac
[    0.854399] de80: c714c000 00000001 00000000 00000000 c0c596e8 c036df5c 00000001 00000000
[    0.854407] dea0: 00000000 00000000 00000004 00000000 00000002 00000002 00000000 00000008
[    0.854416] dec0: 00000000 50ca96b2 00000000 c714c000 c0c59350 00000002 c0c596e8 c0369d10
[    0.861637] uart4: ttyS4 at MMIO 0x2501000 (irq = 36, base_baud = 1500000) is a SUNXI
[    0.866247] dee0: 00000001 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    0.866256] df00: 00000000 00000000 00000000 50ca96b2 00000000 c0c591e0 00000001 c0369e28
[    0.866269] df20: c7040100 c76b6880 c0c594b8 c76b9900 00000000 00000000 c0c594bc c012f0ac
[    0.876002] uart uart5: uart5 supply uart not found, using dummy regulator
[    0.884498] df40: c7040100 c0c594b8 c7040100 c7040114 c76b6880 c714c000 c76b6898 c0b02d00
[    0.884508] df60: c0b0b27c c012f6d0 00000000 c701e880 c714c000 c701e840 c7040100 c012f49c
[    0.884517] df80: c704bec4 c701e89c 00000000 c0133f24 c701e840 c0133e04 00000000 00000000
[    0.884527] dfa0: 00000000 00000000 00000000 c01010e8 00000000 00000000 00000000 00000000
[    0.892457] uart5: ttyS5 at MMIO 0x2501400 (irq = 37, base_baud = 1500000) is a SUNXI
[    0.901302] dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    0.901310] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[    0.901333] [<c03962cc>] (LCD_panel_init) from [<c0373c88>] (disp_lcd_enable+0x2a4/0x2e0)
[    0.901349] [<c0373c88>] (disp_lcd_enable) from [<c036dcf4>] (disp_device_attached_and_enable+0x140/0x260)
[    0.911201] misc dump reg init
[    0.919574] [<c036dcf4>] (disp_device_attached_and_enable) from [<c036df5c>] (bsp_disp_device_switch+0x8c/0xec)
[    0.919586] [<c036df5c>] (bsp_disp_device_switch) from [<c0369d10>] (disp_device_set_config+0xd8/0x100)
[    0.919597] [<c0369d10>] (disp_device_set_config) from [<c0369e28>] (start_work+0xf0/0x174)
[    0.919610] [<c0369e28>] (start_work) from [<c012f0ac>] (process_one_work+0x144/0x20c)
[    0.919626] [<c012f0ac>] (process_one_work) from [<c012f6d0>] (worker_thread+0x234/0x2d8)
[    1.108057] [<c012f6d0>] (worker_thread) from [<c0133f24>] (kthread+0x120/0x12c)
[    1.116309] [<c0133f24>] (kthread) from [<c01010e8>] (ret_from_fork+0x14/0x2c)
[    1.124361] Exception stack(0xc714dfb0 to 0xc714dff8)
[    1.129992] dfa0:                                     00000000 00000000 00000000 00000000
[    1.139112] dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    1.148231] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    1.155610] Code: e2878016 e5cd3003 ebf6fd7c e3a06000 (e5963000)
[    1.162481] ---[ end trace a3d10cdfd74119e3 ]---

最后就是官方LCD调试PDF文档里面提到过SPI，I2C初始化的方式，是通过读取设备树信息probe设备的方式，那理论上这种也是需要i2c在disp之前加载吧，而且他T113S3的设备树貌似无法匹配手册上的方法。

lztmfx

@shz18877605430 在 T113 切换存储，nand flash切换到SD卡启动，挂载文件系统报错中说：

rootfstype=squashfs

rootfstype=ext4

lztmfx

lvds1_pins_a: lvds1@0 {
				pins  =  "PD0", "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD8", "PD9", "PD10", "PD11", "PD12", "PD13", "PD14", "PD15", "PD16", "PD17", "PD18", "PD19";
				function = "lvds1";
				drive-strength = <30>;
				bias-disable;
			};

lvds1_pins_b: lvds1@1 {
				pins  = "PD0", "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD8", "PD9", "PD10", "PD11", "PD12", "PD13", "PD14", "PD15", "PD16", "PD17", "PD18", "PD19";
				function = "io_disabled";
				drive-strength = <30>;
				bias-disable;
			};

&disp {
	disp_init_enable         = <1>;
	disp_mode                = <0>;

	screen0_output_type      = <1>;
	screen0_output_mode      = <10>;

	screen1_output_type      = <1>;
	screen1_output_mode      = <10>;

	// screen1_output_format    = <0>;
	// screen1_output_bits      = <0>;
	// screen1_output_eotf      = <4>;
	// screen1_output_cs        = <257>;
	// screen1_output_dvi_hdmi  = <2>;
	// screen1_output_range     = <2>;
	// screen1_output_scan      = <0>;
	// screen1_output_aspect_ratio = <8>;

	dev0_output_type         = <1>;
	dev0_output_mode         = <4>;
	dev0_screen_id           = <0>;
	dev0_do_hpd              = <0>;

	dev1_output_type         = <1>;
	dev1_output_mode         = <10>;
	dev1_screen_id           = <1>;
	dev1_do_hpd              = <1>;

	def_output_dev           = <0>;
	hdmi_mode_check          = <1>;

	fb0_format               = <9>;
	fb0_width                = <1920>;
	fb0_height               = <1080>;

	fb1_format               = <9>;
	fb1_width                = <1920>;
	fb1_height               = <1080>;
	chn_cfg_mode             = <2>;

	disp_para_zone           = <1>;
	/*VCC-LCD*/
/*	dc1sw-supply = <&reg_dc1sw>;*/
	/*VCC-DSI*/
/*	eldo3-supply = <&reg_eldo3>;*/
	/*VCC-PD*/
/*	dcdc1-supply = <&reg_dcdc1>;*/
};

&lcd0 {
	lcd_used            = <1>;

	lcd_driver_name     = "dual_lvds_lcd";
	lcd_if              = <3>;

	lcd_x               = <1920>;
	lcd_y               = <1080>;
	lcd_width           = <340>;
	lcd_height          = <190>;
	lcd_dclk_freq       = <159>;

	lcd_pwm_used        = <0>;
	lcd_pwm_ch          = <5>;//背光PWM通道号
	lcd_pwm_freq        = <5000>;
	lcd_pwm_pol         = <1>;
	lcd_backlight       = <10>;
	lcd_pwm_max_limit   = <255>;
	//= <&pio PD 27 1 0 3 1>;
	// lcd_bl_en = <&pio PG 3 1 0 3 1>;//背光使能引脚

	lcd_hbp             = <272>;
	lcd_ht              = <2272>;//48
	lcd_hspw            = <32>;
	lcd_vbp             = <80>;
	lcd_vt              = <1169>;//3
	lcd_vspw            = <6>;

	lcd_lvds_if         = <1>;
	lcd_lvds_colordepth = <0>;
	lcd_lvds_mode       = <0>;
	lcd_frm             = <0>;
	lcd_hv_clk_phase    = <0>;
	lcd_hv_sync_polarity= <0>;
	lcd_gamma_en        = <0>;
	lcd_bright_curve_en = <0>;
	lcd_cmap_en         = <0>;

	lcd_fsync_en = <0>;
	lcd_fsync_act_time = <1000>;
	lcd_fsync_dis_time = <1000>;
	lcd_fsync_pol = <0>;

	deu_mode            = <0>;
	lcdgamma4iep        = <22>;
	smart_color         = <90>;

	lcd_gpio_0 = <&pio PG 3 1 0 3 0>;//背光使能

	pinctrl-0 = <&lvds1_pins_a>;
	pinctrl-1 = <&lvds1_pins_b>;
};

adb shell dump的信息：

root@TinaLinux:/# fbset

mode "1920x1080-60"
        geometry 1920 1080 1920 2160 24
        timings 6289 240 80 74 9 32 6
        accel false
        rgba 8/0,8/8,8/16,0/24
endmode

root@TinaLinux:/# cat /sys/kernel/debug/pinctrl/2000000.pinctrl/pinmux-pins
Pinmux settings per pin
Format: pin (name): mux_owner|gpio_owner (strict) hog?
...
pin 96 (PD0): UNCLAIMED
pin 97 (PD1): UNCLAIMED
pin 98 (PD2): UNCLAIMED
pin 99 (PD3): UNCLAIMED
pin 100 (PD4): UNCLAIMED
pin 101 (PD5): UNCLAIMED
pin 102 (PD6): UNCLAIMED
pin 103 (PD7): UNCLAIMED
pin 104 (PD8): UNCLAIMED
pin 105 (PD9): UNCLAIMED
pin 106 (PD10): UNCLAIMED
pin 107 (PD11): UNCLAIMED
pin 108 (PD12): UNCLAIMED
pin 109 (PD13): UNCLAIMED
pin 110 (PD14): UNCLAIMED
pin 111 (PD15): UNCLAIMED
pin 112 (PD16): UNCLAIMED
pin 113 (PD17): UNCLAIMED
pin 114 (PD18): UNCLAIMED
pin 115 (PD19): UNCLAIMED
pin 116 (PD20): UNCLAIMED
pin 117 (PD21): UNCLAIMED
pin 118 (PD22): UNCLAIMED

....

lztmfx

@awwwwa twi_drv_used 是做什么的？以前没看到过，我试试看，我后来把kernel log等级改成3就不打印这么多了

lztmfx

@z2500abc 闹乌龙了，SCL和旁边的PWM引脚连锡了，另外正常的哪路TWI也会打印许多信息，我直接把kernel 的log等级改成3就不打印这么多了

lztmfx

可以启动了，kernel配置有问题，太折磨人了

lztmfx

@lztmfx 这个看似固件损坏或者NAND有坏块，实际上就是rootfs和kernel的SPIFLASH.UBIFS SQUASHFS配置不对

lztmfx

root@TinaLinux:/# i2cdetect -y 0
0 1 2 3 4 5 6 7 8 9 a b c d e f[ 225.484348] sunxi-i2c sunxi-i2c0: runtime resume finish

00: [ 225.494594] sunxi-i2c sunxi-i2c0: engine-mode: start signal xfered
[ 225.494608] sunxi-i2c sunxi-i2c0: engine-mode: [slave address:(0x3),irq state:(0x8)]
[ 225.511400] sunxi-i2c sunxi-i2c0: engine-mode: 7bits+r/w = 0x6 xfered
[ 225.518624] sunxi-i2c sunxi-i2c0: engine-mode: data 0x6 xfered
[ 230.529514] sunxi-i2c sunxi-i2c0: engine-mode: xfer timeout(dev addr:0x3)
[ 230.529546] sunxi-i2c sunxi-i2c0: runtime suspend finish
[ 230.537143] 0x02502000: 00000000 00000000 00000000 00000000
[ 230.549452] 0x02502010: 00000000 00000000 00000000 00000000
-- [ 230.555922] sunxi-i2c sunxi-i2c0: runtime resume finish
[ 230.562028] sunxi-i2c sunxi-i2c0: engine-mode: start signal xfered
[ 235.569499] sunxi-i2c sunxi-i2c0: engine-mode: xfer timeout(dev addr:0x4)
[ 235.569529] sunxi-i2c sunxi-i2c0: runtime suspend finish
[ 235.577115] 0x02502000: 00000000 00000000 00000000 00000000
[ 235.577121] 0x02502010: 00000000 00000000 00000000 00000000
-- [ 235.595857] sunxi-i2c sunxi-i2c0: runtime resume finish
[ 235.601971] sunxi-i2c sunxi-i2c0: engine-mode: start signal xfered
^C[ 240.609525] sunxi-i2c sunxi-i2c0: engine-mode: xfer timeout(dev addr:0x5)
[ 240.609543] sunxi-i2c sunxi-i2c0: runtime suspend finish
[ 240.617154] 0x02502000: 00000000 00000000 00000000 00000000
[ 240.629478] 0x02502010: 00000000 00000000 00000000 00000000

root@TinaLinux:/# i2cdetect -l
i2c-0 i2c sunxi-i2c0 I2C adapter

换了其他没有挂任何设备的I2C也是一样的报错，是不是kernel什么地方配置不对啊？和开源的好几个项目都对比过config配置了，不知道怎么排查了

lztmfx

请问找到原因了吗？我T113S3 SPINAND启动也是这个问题

lztmfx

[ 1.883516] /dev/root: Can't open blockdev
[ 1.888118] VFS: Cannot open root device "ubiblock0_5" or unknown-block(0,0): error -6
[ 1.897030] Please append a correct "root=" boot option; here are the available partitions:
[ 1.906413] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 1.915691] CPU0: stopping
[ 1.918729] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.61 #43
[ 1.925465] Hardware name: Generic DT based system
[ 1.930859] [<c010df08>] (unwind_backtrace) from [<c010a698>] (show_stack+0x10/0x14)
[ 1.939552] [<c010a698>] (show_stack) from [<c0666870>] (dump_stack+0x88/0xa4)
[ 1.947659] [<c0666870>] (dump_stack) from [<c010c2d4>] (handle_IPI+0xe4/0x180)
[ 1.955864] [<c010c2d4>] (handle_IPI) from [<c032330c>] (gic_handle_irq+0x70/0x78)
[ 1.964362] [<c032330c>] (gic_handle_irq) from [<c01021cc>] (__irq_svc+0x6c/0xa8)
[ 1.972757] Exception stack(0xc0a01f40 to 0xc0a01f88)
[ 1.978425] 1f40: 00000e68 c76b8334 00000000 c0114860 00000001 c0a00000 c0a03de4 c0a03e20
[ 1.987606] 1f60: c0a42000 c77ff540 c09280c0 00000000 00000001 c0a01f90 c0107fd0 c0107fc0
[ 1.996781] 1f80: 60000013 ffffffff
[ 2.000699] [<c01021cc>] (__irq_svc) from [<c0107fc0>] (arch_cpu_idle+0x1c/0x38)
[ 2.009001] [<c0107fc0>] (arch_cpu_idle) from [<c013d694>] (do_idle+0xd4/0x128)
[ 2.017202] [<c013d694>] (do_idle) from [<c013d978>] (cpu_startup_entry+0x18/0x20)
[ 2.025699] [<c013d978>] (cpu_startup_entry) from [<c0900c80>] (start_kernel+0x360/0x3ec)
[ 2.034881] [<c0900c80>] (start_kernel) from [<00000000>] (0x0)
[ 2.041529] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]---

使用的是SPI NAND，如果烧录到TF卡就正常启动，用NAND就找不到rootfs,实在是找不到问题了

lztmfxLV 4

@lztmfx

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