[U-Boot] dm video question
Peng Fan
van.freenix at gmail.com
Thu Aug 18 08:19:30 CEST 2016
Hi Simon,
On Tue, Aug 16, 2016 at 10:16:00PM -0600, Simon Glass wrote:
>Hi Peng,
>
>On 15 August 2016 at 04:05, Peng Fan <van.freenix at gmail.com> wrote:
>>
>> Hi Simon,
>>
>> I am trying to coverting mxsfb.c to support dm.
>>
>> But met the following issue.
>> "
>> mxsfb_lcd_bind: Frame buffer size 200400
>> Video device 'lcdif at 021c8000' cannot allocate frame buffer memory -ensure the device is set up before relocation
>> "
>>
>> I add "u-boot, dm-pre-reloc" in dts as the following, but no help.
>>
>
>Can you check that you have that property in each node leading to the
>root also? You can use fdtdump to display the tree.
I did not know that I need to add u-boot,dm-pre-reloc for the nodes
in the path of root -> lcdif.
Now I works. Thanks.
Still have a question.
When enabled DM_VIDEO, do you know how to let the screen show a logo, just like
what cfb_console supports?
Thanks,
PPeng.
>
>Did you add a bind() method to handle the pre-relocaiton setup?
>
>> &lcdif {
>> pinctrl-names = "default";
>> pinctrl-0 = <&pinctrl_lcdif_dat
>> &pinctrl_lcdif_ctrl
>> &pinctrl_lcdif_reset>;
>> display = <&display0>;
>> status = "okay";
>> u-boot,dm-pre-reloc;
>>
>> display0: display {
>> bits-per-pixel = <16>;
>> bus-width = <24>;
>> u-boot,dm-pre-reloc;
>> status = "okay";
>>
>> display-timings {
>> native-mode = <&timing0>;
>> u-boot,dm-pre-reloc;
>> timing0: timing0 {
>> u-boot,dm-pre-reloc;
>> clock-frequency = <9200000>;
>> hactive = <480>;
>> vactive = <272>;
>> hfront-porch = <8>;
>> hback-porch = <4>;
>> hsync-len = <41>;
>> vback-porch = <2>;
>> vfront-porch = <4>;
>> vsync-len = <10>;
>>
>> hsync-active = <0>;
>> vsync-active = <0>;
>> de-active = <1>;
>> pixelclk-active = <0>;
>> };
>> };
>> };
>> };
>
>Regards,
>Simon
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