Hi,
On 6/11/20 11:21 PM, Uwe Kleine-König wrote:
Hello,
On Mon, Jun 08, 2020 at 04:35:00PM +0200, Daniel Vetter wrote:
On Sat, Jun 06, 2020 at 10:25:45PM +0200, Hans de Goede wrote:
Hi All,
This patch series converts the i915 driver's cpde for controlling the
panel's backlight with an external PWM controller to use the atomic PWM API.
Initially the plan was for this series to consist of 2 parts:
1. convert the pwm-crc driver to support the atomic PWM API and
2. convert the i915 driver's PWM code to use the atomic PWM API.
But during testing I've found a number of bugs in the pwm-lpss and I
found that the acpi_lpss code needs some special handling because of
some ugliness found in most Cherry Trail DSDTs.
So now this series has grown somewhat large and consists of 4 parts:
1. acpi_lpss fixes workarounds for Cherry Trail DSTD nastiness
2. various fixes to the pwm-lpss driver
3. convert the pwm-crc driver to support the atomic PWM API and
4. convert the i915 driver's PWM code to use the atomic PWM API
So we need to discuss how to merge this (once it passes review).
Although the inter-dependencies are only runtime I still think we should
make sure that 1-3 are in the drm-intel-next-queued (dinq) tree before
merging the i915 changes. Both to make sure that the intel-gfx CI system
does not become unhappy and for bisecting reasons.
Simplest is if acpi acks the acpi patches for merging through
drm-intel.git. Second simplest is topic branch (drm-intel maintainers can
do that) with the entire pile, which then acpi and drm-intel can both pull
in.
Up to the two maintainer teams to figure this one out.
I'm unclear about the dependencies
There is a runtime dependency of the i915 changes on the PWM changes
and since the intel-gfx folks use a lot of CI, we this need to get the
PWM changes into the drm-intel tree before the i915 changes can land.
, but the changes to drivers/pwm need
an ack (or processing) by the PWM team.
Of course, I asked for an Acked-by from the PWM team
(once this passes review) for merging this through
the drm-intel tree, as the i915 driver is the main
(only AFAIK) consumer of the PWMs controlled by these
2 drivers. Daniel <snip>-ed that bit when he replied.
Regards,
Hans
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