topic Re: u-boot-2015.04 logo problem in i.MX Processors

u-boot-2015.04 logo problem

fulinux — Fri, 22 Apr 2016 04:31:42 GMT

你好，

我准备移植最新版本的u-boot,现在u-boot已经可以跑起来了，如log所示：

U-Boot 2015.04-14469-gd3ef2ab-dirty (Apr 21 2016 - 01:50:53)

CPU: Freescale i.MX6Q rev1.5 at 792 MHz

CPU: Temperature 24 C

Reset cause: POR

Board: MX6-SabreSD

I2C: ready

DRAM: 3.8 GiB

MMC: FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2, FSL_SDHC: 3

No panel detected: default to Hannstar-XGA

Display: Hannstar-XGA (1024x768)

In: serial

Out: serial

Err: serial

switch to partitions #0, OK

mmc0(part 0) is current device

Net: Phy 1 not found

PHY reset timed out

FEC [PRIME]

Normal Boot

Hit any key to stop autoboot: 0

我现在想实现u-boot启动logo，我们的board使用的是samsung的LTM230HL08屏，这是屏的资料：【三星液晶屏LTM230HL08概况】-全球液晶屏交易中心-屏库

下面这个是借口的电路图：

现在我做的工作是在include/configs/mx6sabresd.h文件中：

94 #define CONFIG_SPLASH_SCREEN

95 #define CONFIG_CMD_BMP

96 #define CONFIG_LCD

97 /* #define CONFIG_MXC_EPDC */

99 /*

100 * SPLASH SCREEN Configs

101 */

102 #if defined(CONFIG_SPLASH_SCREEN) && defined(CONFIG_MXC_EPDC)

103 /*

104 * Framebuffer and LCD

105 */

106 #define CONFIG_CMD_BMP

107 #define CONFIG_LCD

108 #define CONFIG_SYS_CONSOLE_IS_IN_ENV

109 #undef LCD_TEST_PATTERN

110 /* #define CONFIG_SPLASH_IS_IN_MMC 1 */

111 #define LCD_BPP LCD_MONOCHROME

112 /* #define CONFIG_SPLASH_SCREEN_ALIGN 1 */

113

114 #define CONFIG_WAVEFORM_BUF_SIZE 0x200000

115 #endif /* CONFIG_SPLASH_SCREEN && CONFIG_MXC_EPDC */

116

117 #endif /* __MX6QSABRESD_CONFIG_H */

打开了上面红色部分的宏，我是不是我是不是要打开CONFIG_MXC_EPDC宏呢，这个宏是干什么的。是不是只用打开CONFIG_SPLASH_SCREEN宏就可以了呢？因为在board/freescale/mx6sabresd/mx6sabresd.c文件中发现有好的定义了这个：

#if defined(CONFIG_MX6DL) && defined(CONFIG_MXC_EPDC)

vidinfo_t panel_info = {

.....

....

#endif

等于说要同事定义CONFIG_MX6DL宏才能用panel_info。如果我定义了上面的：

94 #define CONFIG_SPLASH_SCREEN

95 #define CONFIG_CMD_BMP

96 #define CONFIG_LCD

在编译的时候又会出现错误：

LDS u-boot.lds

LD u-boot

common/built-in.o: In function `lcd_get_size':

/home/fulinux/uboot-imx/common/lcd.c:138: undefined reference to `panel_info'

common/built-in.o: In function `lcd_clear':

/home/fulinux/uboot-imx/common/lcd.c:175: undefined reference to `lcd_setcolreg'

/home/fulinux/uboot-imx/common/lcd.c:176: undefined reference to `lcd_setcolreg'

/home/fulinux/uboot-imx/common/lcd.c:177: undefined reference to `lcd_setcolreg'

/home/fulinux/uboot-imx/common/lcd.c:178: undefined reference to `lcd_setcolreg'

/home/fulinux/uboot-imx/common/lcd.c:179: undefined reference to `lcd_setcolreg'

common/built-in.o:/home/fulinux/uboot-imx/common/lcd.c:180: more undefined references to `lcd_setcolreg' follow

common/built-in.o: In function `lcd_clear':

/home/fulinux/uboot-imx/common/lcd.c:227: undefined reference to `panel_info'

common/built-in.o: In function `lcd_init':

/home/fulinux/uboot-imx/common/lcd.c:252: undefined reference to `lcd_ctrl_init'

/home/fulinux/uboot-imx/common/lcd.c:268: undefined reference to `lcd_enable'

common/built-in.o: In function `lcd_set_cmap':

/home/fulinux/uboot-imx/common/lcd.c:566: undefined reference to `panel_info'

common/built-in.o: In function `lcd_display_bitmap':

/home/fulinux/uboot-imx/common/lcd.c:717: undefined reference to `panel_info'

我很好奇，在

struct display_info_t const displays[] = {{

762 .bus = -1,

763 .addr = 0,

764 .pixfmt = IPU_PIX_FMT_RGB666,

765 .detect = NULL,

766 .enable = enable_lvds,

767 .mode = {

768 .name = "Hannstar-XGA",

769 .refresh = 60,

770 .xres = 1024,

771 .yres = 768,

772 .pixclock = 15385,

773 .left_margin = 220,

774 .right_margin = 40,

775 .upper_margin = 21,

776 .lower_margin = 7,

777 .hsync_len = 60,

778 .vsync_len = 10,

779 .sync = FB_SYNC_EXT,

780 .vmode = FB_VMODE_NONINTERLACED

781 } }, {

结构体中定义了这些项，还需要panel_info，以及lcd的初始化吗？

目前displays结构体我还没有修改，在内核中这个设置是不是可以参考一下：

linux/drivers/video/mxc/ldb.c：

static struct fb_videomode ldb_modedb[] = {

107 { "WXGA", 60, 1680, 1048, 6848,//6848

108 280, 104, //280, 104

109 30, 3, //30, 3

110 176, 6,//176,6

111 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,

112 FB_VMODE_NONINTERLACED,

113 FB_MODE_IS_DETAILED,},

114 {

115 "LDB-WXGA", 60, 1280, 800, 14065,

116 40, 40,

117 10, 3,

118 80, 10,

119 0,

120 FB_VMODE_NONINTERLACED,

121 FB_MODE_IS_DETAILED,},

122 {

123 "LDB-XGA", 60, 1024, 768, 15385,

。。。

我在board/freescale/mx6sabresd/mx6sabresd.c文件中发现了好的epdc关键字的函数，这个是什么，和我这个lvds屏有关系吗？

说的内容很乱，现在大脑也是很纠结。希望你们能提供一点指导下的建议和帮助，有没有什么参考下的文档呢。

期待你的回复。

Re: u-boot-2015.04 logo problem

Rita_Wang — Fri, 22 Apr 2016 07:18:35 GMT

Hi,

About the u-boot logo you can refer to the thread in our community: Patch to support uboot logo keep from uboot to kernel for NXP Linux and Android BSP (HDMI, LCD and LVDS) .

And the LVDS screen porting you can refer to Porting LVDS LCD With Low Resolution to i.MX6 .

Here you need to porting the screen to your board first and then do the u-boot logo. Hope this can help you.
Have a great day,
Dan

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Re: u-boot-2015.04 logo problem

fulinux — Fri, 22 Apr 2016 07:44:30 GMT

你好，

你发给我的这些信息我看了，我是最新版本的imx_v2015.04_4.1.15_1.0.0_ga，这个也需要打补丁？目前我使能了DEBUG宏，打印的log:

fulinux in stido_add_devices

fulinux 1 in drv_video_init

fulinux No panel detected: default to SAMSUNG-LTM230HL08

Display: SAMSUNG-LTM230HL08 (1920x1080)

fulinux 2 in drv_video_init

ipu_clk = 264000000

ldb_clk[0] = 65000000

ldb_clk[1] = 65000000

read BS_CLKGEN0 div:0, final_rate:4224000000, prate:264000000

IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)

mxcfb_init_fbinfo: 4 640 112 524

Framebuffer structures at: fbi=0xfef3b638 mxcfbi=0xfef3b848

allocated fb @ paddr=0xFEF40B80, size=8294400.

Channel already disabled 9

Channel already uninitialized 9

setup_disp_channel1 called

bpp_to_pixfmt: 16

init channel = 9

pixclock = 83001000 Hz

panel size = 1920 x 1080

pixel clk = 83001000Hz

setup_disp_channel2: 95ffcff 1920 1080 3840 fef40b80 ff335380

bpp_to_pixfmt: 16

initializing idma ch 23 @ 027005c0

IPU DMFC DP HIGH RES: 1(0,1), 5B(2~5), 5F(6,7)

ch 23 word 0 - 00000000 00000000 00000000 E0001800 0010DCEF

ch 23 word 1 - 1FE66A70 03FBD02E 20E3C000 F2C3BFC0 00082CA0

PFS 0x7, BPP 0x3, NPB 0xf

FW 1919, FH 1079, Stride 3839

Width0 4+1, Width1 5+1, Width2 4+1, Width3 7+1, Offset0 0, Offset1 5, Offset2 11, Offset3 16

IPU_CONF = 0x00000660

IDMAC_CONF = 0x0000002F

IDMAC_CHA_EN1 = 0x00800000

IDMAC_CHA_EN2 = 0x00000000

IDMAC_CHA_PRI1 = 0x18800000

IDMAC_CHA_PRI2 = 0x00000000

IPU_CHA_DB_MODE_SEL0 = 0x00800000

IPU_CHA_DB_MODE_SEL1 = 0x00000000

DMFC_WR_CHAN = 0x00000090

DMFC_WR_CHAN_DEF = 0x202020F6

DMFC_DP_CHAN = 0x0000968A

DMFC_DP_CHAN_DEF = 0x2020F6F6

DMFC_IC_CTRL = 0x00000002

IPU_FS_PROC_FLOW1 = 0x00000000

IPU_FS_PROC_FLOW2 = 0x00000000

IPU_FS_PROC_FLOW3 = 0x00000000

IPU_FS_DISP_FLOW1 = 0x00000000

Framebuffer at 0xfef40b80

Video: Drawing the logo ...

fulinux vido_logo

fulinux go logo_plot

fulinux go board_cfb_skip

fulinux here 1

代码：

2244 #ifdef CONFIG_VIDEO_LOGO

2245 /* Plot the logo and get start point of console */

2246 debug("Video: Drawing the logo ...\n");

2247 printf ("fulinux vido_logo\n");

2248 video_console_address = video_logo();

说明已经走了正常的逻辑去显示logo，应该在我的屏幕上显示u-boot的版本信息字符串的，但是显示屏一片漆黑，是不是电源引脚和和其他硬件设置的不对，

在u-boot中哪里设置lvds屏的引脚？

Re: u-boot-2015.04 logo problem

fulinux — Fri, 22 Apr 2016 09:13:46 GMT

94 #define CONFIG_SPLASH_SCREEN

95 /* #define CONFIG_MXC_EPDC */

CONFIG_MXC_EPDC这个宏需不需要打开，需不需要定义panel_info数据结构体。