[U-Boot] [PATCH] sunxi: display: Make lcd display clk phase configurable

[Hans de Goede]

Hi,

On 18-01-15 04:12, Simon Glass wrote:
> Hi Hans,
>
> On 13 January 2015 at 04:33, Hans de Goede <hdegoede at redhat.com> wrote:
>> While running some tests with an Olinuxino-A13-Micro + a 7" Olimex LCD module
>> I noticed that the screen flickered. This is caused by the lcd display clk
>> phase reg value being set to 0, where it should be 1 in this setup.
>>
>> This commit adds a Kconfig option for the lcd display clk phase, so that we
>> can set it per board. This defaults to 1, because looking at all the fex
>> files in sunxi-boards, that is by far the most used value.
>>
>> This commit updated the Ippo and MSI Primo73 tablet defconfigs to override the
>> default of 1 with 0, as that is the correct value for those tablets, this
>> keeps the register settings the same as before this commit.
>>
>> The Olinuxino-A13 defconfigs are not updated, changing the register setting
>> for these boards from 0 to 1, this is intentional.
>>
>> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
>> ---
>>   arch/arm/include/asm/arch-sunxi/display.h | 4 +---
>>   board/sunxi/Kconfig                       | 7 +++++++
>>   configs/Ippo_q8h_v1_2_defconfig           | 1 +
>>   configs/Ippo_q8h_v5_defconfig             | 1 +
>>   configs/MSI_Primo73_defconfig             | 1 +
>>   drivers/video/sunxi_display.c             | 7 +------
>>   6 files changed, 12 insertions(+), 9 deletions(-)
>
> Are you planning to move this to device tree at some point?

Yes, one of the free-electrons guys is working on a kms driver, once we've that
and thus stable devicetree bindings for the display blocks I want to move all
this over to devicetree.

Regards,

Hans