[PATCH 0/9] drm/panel and i2c-hid: Allow panels and touchscreens to power sequence together

Douglas Anderson
2023-05-23T19:31:35Z

The big motivation for this patch series is mostly described in the patch
("drm/panel: Add a way for other devices to follow panel state"), but to
quickly summarize here: for touchscreens that are connected to a panel we
need the ability to power sequence the two device together. This is not a
new need, but so far we've managed to get by through a combination of
inefficiency, added costs, or perhaps just a little bit of brokenness.
It's time to do better. This patch series allows us to do better.

Assuming that people think this patch series looks OK, we'll have to
figure out the right way to land it. The panel patches and i2c-hid
patches will go through very different trees and so either we'll need
an Ack from one side or the other or someone to create a tag for the
other tree to pull in. This will _probably_ require the true drm-misc
maintainers to get involved, not a lowly committer. ;-)

Douglas Anderson (9):
dt-bindings: HID: i2c-hid: Add "panel" property to i2c-hid backed
panels
drm/panel: Check for already prepared/enabled in drm_panel
drm/panel: Add a way for other devices to follow panel state
HID: i2c-hid: Switch to SYSTEM_SLEEP_PM_OPS()
HID: i2c-hid: Rearrange probe() to power things up later
HID: i2c-hid: Make suspend and resume into helper functions
HID: i2c-hid: Support being a panel follower
HID: i2c-hid: Do panel follower work on the system_wq
arm64: dts: qcom: sc7180: Link trogdor touchscreens to the panels

.../bindings/input/elan,ekth6915.yaml | 6 +
.../bindings/input/goodix,gt7375p.yaml | 6 +
.../bindings/input/hid-over-i2c.yaml | 6 +
.../boot/dts/qcom/sc7180-trogdor-coachz.dtsi | 1 +
.../dts/qcom/sc7180-trogdor-homestar.dtsi | 1 +
.../boot/dts/qcom/sc7180-trogdor-lazor.dtsi | 1 +
.../boot/dts/qcom/sc7180-trogdor-pompom.dtsi | 1 +
.../qcom/sc7180-trogdor-quackingstick.dtsi | 1 +
.../dts/qcom/sc7180-trogdor-wormdingler.dtsi | 1 +
drivers/gpu/drm/drm_panel.c | 194 +++++++++-
drivers/hid/i2c-hid/i2c-hid-core.c | 330 +++++++++++++-----
include/drm/drm_panel.h | 89 +++++
12 files changed, 542 insertions(+), 95 deletions(-)

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2.40.1.698.g37aff9b760-goog