[U-Boot] [PATCH V4] i.MX6: mx6qsabrelite: Add splash screen support

[Eric Nelson]

On 09/23/2012 03:53 PM, Eric Nelson wrote:
> On 09/22/2012 10:19 AM, Eric Nelson wrote:
>> On 09/22/2012 10:02 AM, Fabio Estevam wrote:
>>> Hi Eric,
>>>
>>> On Sat, Sep 22, 2012 at 1:51 PM, Eric Nelson
>>> <eric.nelson at boundarydevices.com> wrote:
>>>
>>>> Interestingly, I saw U-Boot display on HDMI during my testing,
>>>> so I'm pretty certain that all we need is the HDMI transmitter
>>>> initialization sequence.
>>>
>>> Excellent, could you please share the HDMI transmitter init sequence?
>>>
>>
>> Hi Fabio,
>>
>> I haven't worked through the details, but I'm sure they're in here ;)
>>
>> https://github.com/boundarydevices/linux-imx6/blob/boundary-L3.0.35_MX6DQ_ER_1208-Beta/drivers/video/mxc_hdmi.c
>>
>>
>
> This may be easier than I thought (a set of writes to a single register).
>
> I did a little digging, and it seems that the power-on defaults for the
> HDMI transmitter work pretty well with my display (many thanks to the
> chip designers!).
>
> Without some more digging, I'm not very confident that the clocks
> are all getting set up properly, but the attached patch allows me
> to get 1080P video over HDMI.
>
> It also highlights some issues in the I2C detection structure
> (two parallel arrays that I hacked), but it gives me a lot more
> confidence that HDMI is achievable in the short term for at least
> one display.
>

Hi Stefano,

I have HDMI detection and display support working well.

In the process, I've refactored the display detection and activation
logic to use some callbacks instead of conditionals.

I'd like to submit the new code as a V5 of the splash screen patch:
	http://patchwork.ozlabs.org/patch/186278/

I'm not sure which tree I should use though.

	u-boot-imx/master?
	u-boot-imx/next?

/next will require that I revert the previous version.

Similarly, I have a couple of patches to allow passing const
structures to ipuv3_fb_init() and imx_iomux_v3_setup_multiple_pads()
and I'm not sure what will be easiest for you to merge.

Please let me know what works best for you.

Regards,


Eric