[U-Boot] persistent logo on LCD on imx6ull

[Michael Nazzareno Trimarchi]

Hi Peng

I'm working to make persistent the uboot logo on imx6ull platform but
I have some problem with the framebuffer. Now this is the main idea

I use this to recalculate allocation

ubi part ubiblock; ubi read ${loadaddr} updater; run load_dtb;
fdt addr ${fdt_addr}
fdt set /reserved-memory/framebuffer reg "<0x$video_address
0x$video_memory_size>"
fdt set /chosen/framebuffer reg "<0x$video_address 0x$video_memory_size>"


In linux I have

+       aliases {
+               display0 = &lcdif;
+       };
+
+       reserved-memory {
+               #address-cells = <1>;
+               #size-cells = <1>;
+               ranges;
+
+               display_reserved: framebuffer at 86fa2000 {
+                       reg = <0x86fa2000 0x80000>;
+                       no-map;
+               };
+
+       };
+
+       chosen {
+               #address-cells = <1>;
+               #size-cells = <1>;
+               ranges;
+
+               stdout-path = "display0";
+               framebuffer0: framebuffer at 86fa2000 {
+                       #clock-cells = <1>;
+                       pinctrl-names = "default";
+                       pinctrl-0 = <&pinctrl_lcdif>;
+                       compatible = "simple-framebuffer";
+                       reg = <0x86fa2000 (480 * 272 * 4)>;
+                       width = <480>;
+                       height = <272>;
+                       stride = <(480 * 4)>;
+                       format = "a8r8g8b8";
+                       clocks = <&clks IMX6UL_CLK_LCDIF_PIX>,
+                                <&clks IMX6UL_CLK_LCDIF_APB>;
+                       nshut-supply = <&reg_lcd_nshut>;
+                       nreset-supply = <&reg_lcd_nreset>;
+                       display = <&lcdif>;
+               };
+       };

and this in uboot

index 4011066..beddd4a 100644
--- a/drivers/video/cfb_console.c
+++ b/drivers/video/cfb_console.c
@@ -69,6 +69,7 @@
 #include <version.h>
 #include <malloc.h>
 #include <video.h>
+#include <lcd.h>
 #include <linux/compiler.h>

 #if defined(CONFIG_VIDEO_MXS)
@@ -2107,6 +2108,9 @@ static int cfg_video_init(void)
        video_console_address = video_fb_address;
 #endif

+       env_set_hex("video_address", (unsigned long)VIDEO_FB_ADRS);
+       env_set_hex("video_memory_size", (unsigned long)
roundup(VIDEO_SIZE, PAGE_SIZE));
+
        /* Initialize the console */
        console_col = 0;
        console_row = 0;
diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index 4e3e3d7..e2a5c05 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -7,6 +7,7 @@
 #include <common.h>
 #include <malloc.h>
 #include <video_fb.h>
+#include <lcd.h>

 #include <asm/arch/imx-regs.h>
 #include <asm/arch/clock.h>
@@ -214,8 +215,8 @@ void *video_hw_init(void)
        panel.memSize = mode.xres * mode.yres * panel.gdfBytesPP;

        /* Allocate framebuffer */
-       fb = memalign(ARCH_DMA_MINALIGN,
-                     roundup(panel.memSize, ARCH_DMA_MINALIGN));
+       fb = memalign(PAGE_SIZE,
+                     roundup(panel.memSize, PAGE_SIZE));
        if (!fb) {
                printf("MXSFB: Error allocating framebuffer!\n");
                return NULL;

I have two problems. (Using the latest uboot and linux)

1) I have a 50uS glitch on gpios so they get down and up again (nshut
and nreset) even I don't touch them
2) Even clock tree is ok pixelclock seems that stops to go out

Do you have any suggestion?

Michael



-- 
| Michael Nazzareno Trimarchi                     Amarula Solutions BV |
| COO  -  Founder                                      Cruquiuskade 47 |
| +31(0)851119172                                 Amsterdam 1018 AM NL |
|                  [`as] http://www.amarulasolutions.com               |