[PATCH 5/5] sunxi: add drivers and configs needed for LCD display

Martin Cerveny
2020-09-16T15:44:58Z

On Wed, 16 Sep 2020, Maxime Ripard wrote:
> On Wed, Sep 16, 2020 at 04:10:52PM +0200, Martin Cerveny wrote:
>> Add PWM and dummy power regulator support.
>> Modify data timings for LCD displays.
>>
>> Signed-off-by: Martin Cerveny <m.cerveny@computer.org>
>> ---
>> configs/LicheePi_Zero_defconfig | 4 ++++
>> 1 file changed, 4 insertions(+)
>>
>> diff --git a/configs/LicheePi_Zero_defconfig b/configs/LicheePi_Zero_defconfig
>> index 04d7b64504..ba1c085ec3 100644
>> --- a/configs/LicheePi_Zero_defconfig
>> +++ b/configs/LicheePi_Zero_defconfig
>> @@ -3,5 +3,9 @@ CONFIG_ARCH_SUNXI=y
>> CONFIG_SPL=y
>> CONFIG_MACH_SUN8I_V3S=y
>> CONFIG_DRAM_CLK=360
>> +CONFIG_VIDEO_LCD_DCLK_PHASE=0
>> CONFIG_DEFAULT_DEVICE_TREE="sun8i-v3s-licheepi-zero"
>> # CONFIG_NETDEVICES is not set
>> +CONFIG_DM_REGULATOR=y
>> +CONFIG_DM_PWM=y
>> +CONFIG_PWM_SUNXI=y
>
> The LicheePi Zero doesn't have any display by default. Also you're
> mentionning in your commit log that you "modify data timings", but I
> don't see any timings in there?

CONFIG_VIDEO_LCD_DCLK_PHASE is LCD data clock phase,
standard "1" corrupts output on display,
see
- register "TCON0_IO_POL_REG" in V3S manual
- arch/arm/mach-sunxi/Kconfig

Regards.