Hello,
On Wed, Jul 01, 2020 at 05:54:05PM +0200, Guido Günther wrote:
Hi, On Wed, Jul 01, 2020 at 12:31:13PM +0200, Ondrej Jirman wrote:
This patchset adds support for the LCD panel of PinePhone.
I gave this a quick spin on the Librem5 devkit so
Tested-by: Guido Günther agx@sigxcpu.org
but please also adjust MAINTAINERS so we stay in the loop on driver changes.
Ah, right. I'll send a quick followup patch[1] after this gets merged, or add it to v8 if there will be a need for v8. Thanks for noticing.
[1] https://megous.com/dl/tmp/0001-MAINTAINERS-Update-entry-for-st7703-driver-af...
And thanks for testing, too. :)
regards, o.
Cheers, -- Guido
I've tested this on PinePhone 1.0 and 1.2.
Please take a look.
thank you and regards, Ondrej Jirman
Changes in v6:
- Fixed spacing in yaml
- Fixed wrong vccio->iovcc supply name in the bindings doc
- I noticed that the original driver uses a delay of 20ms in the init function to achieve a combined total of 120ms required from post-reset to display_on. I've added a similar delay to xbd599_init, so that xbd599 panel also has the right timing. (patch 9)
- v5->v6 diff: https://megous.com/dl/tmp/v5-v6.patch
- Added review/ack tags
- Learned to run dt_binding_check by myself ;)
Changes in v5:
- rewritten on top of rocktech-jh057n00900 driver
- rocktech-jh057n00900 renamed to st7703 (controller name)
- converted rocktech-jh057n00900 bindings to yaml and extended for xbd599
Changes in v4:
- use ->type from the mode instead of hardcoding (Samuel)
- move init_sequence to ->prepare (Samuel)
- move anti-flicker delay to ->enable, explain it (Samuel)
- add enter_sleep after display_off (Samuel)
- drop ->disable (move code to ->unprepare)
- add ID bytes dumping (Linus) (I can't test it since allwinner DSI driver has a broken dcs_read function, and I didn't manage to fix it.)
- document magic bytes (Linus)
- assert reset during powerup
- cleanup powerup timings according to the datasheet
Changes in v3:
Panel driver renamed to the name of the LCD controller
Re-organize the driver slightly to more easily support more panels based on the same controller.
Add patch to enable the touchscreen to complete the LCD support on PinePhone.
Dropped the "DSI fix" patch (the driver seems to work for me without it)
Improved brightness levels handling:
- PinePhone 1.0 uses default levels generated by the driver
- On PinePhone 1.1 duty cycles < 20% lead to black screen, so default levels can't be used. Martijn Braam came up with a list of duty cycle values that lead to perception of linear brigtness level <-> light intensity on PinePhone 1.1
There was some feedback on v2 about this being similar to st7701. It's only similar in name. Most of the "user commands" are different, so I opted to keep this in a new driver instead of creating st770x.
Anyone who likes to check the differences, here are datasheets:
Changes in v2:
- DT Example fix.
- DT Format fix.
- Raised copyright info to 2020.
- Sort panel operation functions.
- Sort inclusion.
-- For phone owners: --
There's an open question on how to set the backlight brightness values on post 1.0 revision phone, since lower duty cycles (< 10-20%) lead to backlight being black. It would be nice if more people can test the various backlight levels on 1.1 and 1.2 revision with this change in dts:
brightness-levels = <0 1000>; num-interpolated-steps = <1000>;and report at what brightness level the backlight turns on. So far it seems this has a wide range. Lowest useable duty cycle for me is ~7% on 1.2 and for Martijn ~20% on 1.1.
Icenowy Zheng (2): dt-bindings: vendor-prefixes: Add Xingbangda arm64: dts: sun50i-a64-pinephone: Enable LCD support on PinePhone
Ondrej Jirman (11): dt-bindings: panel: Convert rocktech,jh057n00900 to yaml dt-bindings: panel: Add compatible for Xingbangda XBD599 panel drm/panel: rocktech-jh057n00900: Rename the driver to st7703 drm/panel: st7703: Rename functions from jh057n prefix to st7703 drm/panel: st7703: Prepare for supporting multiple panels drm/panel: st7703: Move code specific to jh057n closer together drm/panel: st7703: Move generic part of init sequence to enable callback drm/panel: st7703: Add support for Xingbangda XBD599 drm/panel: st7703: Enter sleep after display off drm/panel: st7703: Assert reset prior to powering down the regulators arm64: dts: sun50i-a64-pinephone: Add touchscreen support
.../display/panel/rocktech,jh057n00900.txt | 23 - .../display/panel/rocktech,jh057n00900.yaml | 70 ++ .../devicetree/bindings/vendor-prefixes.yaml | 2 + .../allwinner/sun50i-a64-pinephone-1.1.dts | 19 + .../dts/allwinner/sun50i-a64-pinephone.dtsi | 54 ++ drivers/gpu/drm/panel/Kconfig | 26 +- drivers/gpu/drm/panel/Makefile | 2 +- .../drm/panel/panel-rocktech-jh057n00900.c | 424 ----------- drivers/gpu/drm/panel/panel-sitronix-st7703.c | 656 ++++++++++++++++++ 9 files changed, 815 insertions(+), 461 deletions(-) delete mode 100644 Documentation/devicetree/bindings/display/panel/rocktech,jh057n00900.txt create mode 100644 Documentation/devicetree/bindings/display/panel/rocktech,jh057n00900.yaml delete mode 100644 drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c create mode 100644 drivers/gpu/drm/panel/panel-sitronix-st7703.c
-- 2.27.0