[U-Boot] [PATCH 0/4] tegra: Move tegra20 towards the 'new' display bindings

[Simon Glass]

Hi Lucas,

On 14 January 2016 at 13:34, Lucas Stach <dev at lynxeye.de> wrote:
> Am Donnerstag, den 14.01.2016, 13:26 -0700 schrieb Simon Glass:
>> The original tegra20 display driver was written before Linux had
>> device tree
>> bindings for display. Since then Linux has developed a robust set of
>> bindings
>> covering various aspects of enabling a display.
>>
>> This series moves closer to those bindings by using the panel and
>> backlight
>> as separate drivers. The device tree files for seaboard, ventana and
>> harmony
>> thereby become almost the same as Linux.
>>
>> Unfortunately this breaks the other boards, which will need a similar
>> sync.
>> So I'm not sure how easy it will be to accept this series. Still, it
>> seems
>> worth sending it out in the hope that board maintainers can help. I
>> have
>> kept this series separate so that it can progress separately.
>>
> By pushing display timings into the DT you are actually diverging from
> mainline, as mainline doesn't require this, but instead infers the
> timings from the panel compatible. Is this a desired goal?

This is not divergence. Please take a look at the patch series. The
device tree files are very close to the same now. The existing U-Boot
support has display timings in the device tree too, so this is not
being added.

The display timings are a small part of the work, but in the back of
my mind is that we don't want to have a big table of display panel
timings as exists in Linux. This is a waste of space when a board will
only use one panel.

>
> Regards,
> Lucas
>
>>
>> Simon Glass (4):
>>   tegra: dts: Sync seaboard device tree file with Linux
>>   video: tegra: Move to using simple-panel and pwm-backlight
>>   tegra: video: Always use write-through cache on LCD
>>   fdt: Drop some unused compatible strings
>>
>>  arch/arm/dts/tegra20-harmony.dts  | 751
>> ++++++++++++++++++++++++++++--
>>  arch/arm/dts/tegra20-seaboard.dts | 934
>> ++++++++++++++++++++++++++++++++++----
>>  arch/arm/dts/tegra20-ventana.dts  | 685 ++++++++++++++++++++++++++--
>>  configs/colibri_t20_defconfig     |   5 +-
>>  configs/harmony_defconfig         |   5 +-
>>  configs/medcom-wide_defconfig     |   5 +-
>>  configs/paz00_defconfig           |   5 +-
>>  configs/seaboard_defconfig        |   5 +-
>>  configs/tec_defconfig             |   5 +-
>>  configs/ventana_defconfig         |   5 +-
>>  drivers/video/tegra.c             | 333 +++-----------
>>  include/fdtdec.h                  |   4 -
>>  lib/fdtdec.c                      |   4 -
>>  13 files changed, 2307 insertions(+), 439 deletions(-)
>>

Regards,
Simon