| Message ID | 20221209-fp4-pm6150l-flash-v1-3-531521eb2a72@fairphone.com |
|---|---|
| State | Accepted |
| Commit | 1c170714490e4d8c0886019145c9d90dfade14f9 |
| Headers | show |
| Series | Add PM6150L flash LED to Fairphone 4 | expand |
On 9.12.2022 14:54, Luca Weiss wrote: > Configure the pm6150l flash node for the dual flash LEDs found on FP4. > > Signed-off-by: Luca Weiss <luca.weiss@fairphone.com> > --- Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org> Konrad > arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts | 23 +++++++++++++++++++++++ > 1 file changed, 23 insertions(+) > > diff --git a/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts b/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts > index c456e9594ea5..fef7d1d02925 100644 > --- a/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts > +++ b/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts > @@ -7,6 +7,7 @@ > > #include <dt-bindings/gpio/gpio.h> > #include <dt-bindings/input/input.h> > +#include <dt-bindings/leds/common.h> > #include <dt-bindings/pinctrl/qcom,pmic-gpio.h> > #include <dt-bindings/regulator/qcom,rpmh-regulator.h> > #include "sm7225.dtsi" > @@ -367,6 +368,28 @@ &mpss { > firmware-name = "qcom/sm7225/fairphone4/modem.mdt"; > }; > > +&pm6150l_flash { > + status = "okay"; > + > + led-0 { > + function = LED_FUNCTION_FLASH; > + color = <LED_COLOR_ID_YELLOW>; > + led-sources = <1>; > + led-max-microamp = <180000>; > + flash-max-microamp = <1000000>; > + flash-max-timeout-us = <1280000>; > + }; > + > + led-1 { > + function = LED_FUNCTION_FLASH; > + color = <LED_COLOR_ID_WHITE>; > + led-sources = <2>; > + led-max-microamp = <180000>; > + flash-max-microamp = <1000000>; > + flash-max-timeout-us = <1280000>; > + }; > +}; > + > &pm6150l_wled { > status = "okay"; > >
Hi! > Configure the pm6150l flash node for the dual flash LEDs found on FP4. > +&pm6150l_flash { > + status = "okay"; > + > + led-0 { > + function = LED_FUNCTION_FLASH; > + color = <LED_COLOR_ID_YELLOW>; > + led-sources = <1>; > + led-max-microamp = <180000>; > + flash-max-microamp = <1000000>; > + flash-max-timeout-us = <1280000>; > + }; I'm pretty sure the flash is not yellow. Plus, how is the node in /sys/class/leds called? Can you make an entry in Documentation/leds/well-known-leds.txt and ensure the name stays consistent across devices? Best regards, Pavel
On Sat Dec 10, 2022 at 6:16 PM CET, Pavel Machek wrote: > Hi! > > > Configure the pm6150l flash node for the dual flash LEDs found on FP4. > > > +&pm6150l_flash { > > + status = "okay"; > > + > > + led-0 { > > + function = LED_FUNCTION_FLASH; > > + color = <LED_COLOR_ID_YELLOW>; > > + led-sources = <1>; > > + led-max-microamp = <180000>; > > + flash-max-microamp = <1000000>; > > + flash-max-timeout-us = <1280000>; > > + }; Hi Pavel, > > I'm pretty sure the flash is not yellow. The marketing term is Dual LED flash or Dual-tone flash, one LED is a blue-ish white and one is a yellow-ish white, but from what I can tell, in the original code it's always referred to as white and yellow so I also followed that here. Also the LEDs are right next to each other so in practise for torch just both go on, and for camera flash I cannot really tell you but I guess it's doing something there with the camera tuning. See also this picture: https://shop.fairphone.com/media/catalog/product/cache/b752d78484639b19641a8560800d919d/p/_/p_5b_main_camera_back.jpg > > Plus, how is the node in /sys/class/leds called? Can you make an entry > in Documentation/leds/well-known-leds.txt and ensure the name stays > consistent across devices? / # ls -al /sys/class/leds/white:flash/ total 0 drwxr-xr-x 3 0 0 0 Jan 1 00:00 . drwxr-xr-x 4 0 0 0 Jan 1 00:00 .. -rw-r--r-- 1 0 0 4096 Jan 1 00:00 brightness lrwxrwxrwx 1 0 0 0 Jan 1 00:00 device -> ../../../c440000.spmi:pmic@5:led-controller@d300 -rw-r--r-- 1 0 0 4096 Jan 1 00:00 flash_brightness -r--r--r-- 1 0 0 4096 Jan 1 00:00 flash_fault -rw-r--r-- 1 0 0 4096 Jan 1 00:00 flash_strobe -rw-r--r-- 1 0 0 4096 Jan 1 00:00 flash_timeout -r--r--r-- 1 0 0 4096 Jan 1 00:00 max_brightness -r--r--r-- 1 0 0 4096 Jan 1 00:00 max_flash_brightness -r--r--r-- 1 0 0 4096 Jan 1 00:00 max_flash_timeout drwxr-xr-x 2 0 0 0 Jan 1 00:00 power lrwxrwxrwx 1 0 0 0 Jan 1 00:00 subsystem -> ../../../../../../../../../class/leds -rw-r--r-- 1 0 0 4096 Jan 1 00:00 uevent / # ls -al /sys/class/leds/yellow:flash/ total 0 drwxr-xr-x 3 0 0 0 Jan 1 00:00 . drwxr-xr-x 4 0 0 0 Jan 1 00:00 .. -rw-r--r-- 1 0 0 4096 Jan 1 00:00 brightness lrwxrwxrwx 1 0 0 0 Jan 1 00:00 device -> ../../../c440000.spmi:pmic@5:led-controller@d300 -rw-r--r-- 1 0 0 4096 Jan 1 00:00 flash_brightness -r--r--r-- 1 0 0 4096 Jan 1 00:00 flash_fault -rw-r--r-- 1 0 0 4096 Jan 1 00:00 flash_strobe -rw-r--r-- 1 0 0 4096 Jan 1 00:00 flash_timeout -r--r--r-- 1 0 0 4096 Jan 1 00:00 max_brightness -r--r--r-- 1 0 0 4096 Jan 1 00:00 max_flash_brightness -r--r--r-- 1 0 0 4096 Jan 1 00:00 max_flash_timeout drwxr-xr-x 2 0 0 0 Jan 1 00:00 power lrwxrwxrwx 1 0 0 0 Jan 1 00:00 subsystem -> ../../../../../../../../../class/leds -rw-r--r-- 1 0 0 4096 Jan 1 00:00 uevent There's also already flash LED on PinePhone and some MSM8916 devices, but I think they also have white:flash based on the dt. > > Best regards, > Pavel > -- > People of Russia, stop Putin before his war on Ukraine escalates.
On 2022/12/12 21:59, Luca Weiss wrote: > On Sat Dec 10, 2022 at 6:16 PM CET, Pavel Machek wrote: >> Hi! >> >>> Configure the pm6150l flash node for the dual flash LEDs found on FP4. >> >>> +&pm6150l_flash { >>> + status = "okay"; >>> + >>> + led-0 { >>> + function = LED_FUNCTION_FLASH; >>> + color = <LED_COLOR_ID_YELLOW>; >>> + led-sources = <1>; >>> + led-max-microamp = <180000>; >>> + flash-max-microamp = <1000000>; >>> + flash-max-timeout-us = <1280000>; >>> + }; > > Hi Pavel, > >> >> I'm pretty sure the flash is not yellow. > > The marketing term is Dual LED flash or Dual-tone flash, one LED is a > blue-ish white and one is a yellow-ish white, but from what I can tell, > in the original code it's always referred to as white and yellow so I > also followed that here. > > Also the LEDs are right next to each other so in practise for torch just > both go on, and for camera flash I cannot really tell you but I guess > it's doing something there with the camera tuning. > > See also this picture: > https://shop.fairphone.com/media/catalog/product/cache/b752d78484639b19641a8560800d919d/p/_/p_5b_main_camera_back.jpg > Hi Pavel, Luca is right. It is normally called dual CCT (Correlated Color Temperature) flash LED. It has 2 LEDs, one is with higher CCT (~6000K) so it looks like a white LED, another is with lower CCT (~2000K) and it looks like a yellow LED. I am not an expert of this but my understanding is the camera tuning process normally adjusts the brightness of the two LEDs and enables them to get different CCT for different snapshots. I was thinking to use the "white" and "yellow" to name the flash LEDs which should be much better that just using indexes, it implicitly tell that the "white" one is having higher CCT and the "yellow" one is having lower CCT. Fenglin >> >> Plus, how is the node in /sys/class/leds called? Can you make an entry >> in Documentation/leds/well-known-leds.txt and ensure the name stays >> consistent across devices? > > / # ls -al /sys/class/leds/white:flash/ > total 0 > drwxr-xr-x 3 0 0 0 Jan 1 00:00 . > drwxr-xr-x 4 0 0 0 Jan 1 00:00 .. > -rw-r--r-- 1 0 0 4096 Jan 1 00:00 brightness > lrwxrwxrwx 1 0 0 0 Jan 1 00:00 device -> ../../../c440000.spmi:pmic@5:led-controller@d300 > -rw-r--r-- 1 0 0 4096 Jan 1 00:00 flash_brightness > -r--r--r-- 1 0 0 4096 Jan 1 00:00 flash_fault > -rw-r--r-- 1 0 0 4096 Jan 1 00:00 flash_strobe > -rw-r--r-- 1 0 0 4096 Jan 1 00:00 flash_timeout > -r--r--r-- 1 0 0 4096 Jan 1 00:00 max_brightness > -r--r--r-- 1 0 0 4096 Jan 1 00:00 max_flash_brightness > -r--r--r-- 1 0 0 4096 Jan 1 00:00 max_flash_timeout > drwxr-xr-x 2 0 0 0 Jan 1 00:00 power > lrwxrwxrwx 1 0 0 0 Jan 1 00:00 subsystem -> ../../../../../../../../../class/leds > -rw-r--r-- 1 0 0 4096 Jan 1 00:00 uevent > / # ls -al /sys/class/leds/yellow:flash/ > total 0 > drwxr-xr-x 3 0 0 0 Jan 1 00:00 . > drwxr-xr-x 4 0 0 0 Jan 1 00:00 .. > -rw-r--r-- 1 0 0 4096 Jan 1 00:00 brightness > lrwxrwxrwx 1 0 0 0 Jan 1 00:00 device -> ../../../c440000.spmi:pmic@5:led-controller@d300 > -rw-r--r-- 1 0 0 4096 Jan 1 00:00 flash_brightness > -r--r--r-- 1 0 0 4096 Jan 1 00:00 flash_fault > -rw-r--r-- 1 0 0 4096 Jan 1 00:00 flash_strobe > -rw-r--r-- 1 0 0 4096 Jan 1 00:00 flash_timeout > -r--r--r-- 1 0 0 4096 Jan 1 00:00 max_brightness > -r--r--r-- 1 0 0 4096 Jan 1 00:00 max_flash_brightness > -r--r--r-- 1 0 0 4096 Jan 1 00:00 max_flash_timeout > drwxr-xr-x 2 0 0 0 Jan 1 00:00 power > lrwxrwxrwx 1 0 0 0 Jan 1 00:00 subsystem -> ../../../../../../../../../class/leds > -rw-r--r-- 1 0 0 4096 Jan 1 00:00 uevent > > There's also already flash LED on PinePhone and some MSM8916 devices, > but I think they also have white:flash based on the dt. > >> >> Best regards, >> Pavel >> -- >> People of Russia, stop Putin before his war on Ukraine escalates. >
Hi! > > > I'm pretty sure the flash is not yellow. > > > > The marketing term is Dual LED flash or Dual-tone flash, one LED is a > > blue-ish white and one is a yellow-ish white, but from what I can tell, > > in the original code it's always referred to as white and yellow so I > > also followed that here. > > > > Also the LEDs are right next to each other so in practise for torch just > > both go on, and for camera flash I cannot really tell you but I guess > > it's doing something there with the camera tuning. > > > > See also this picture: > > https://shop.fairphone.com/media/catalog/product/cache/b752d78484639b19641a8560800d919d/p/_/p_5b_main_camera_back.jpg > > > Hi Pavel, > > Luca is right. It is normally called dual CCT (Correlated Color Temperature) > flash LED. It has 2 LEDs, one is with higher CCT (~6000K) so it looks like a > white LED, another is with lower CCT (~2000K) and it looks like a yellow > LED. I am not an expert of this but my understanding is the camera tuning > process normally adjusts the brightness of the two LEDs and enables them to > get different CCT for different snapshots. I believe this is normally called "warm white" and "cool white", no? Yellow would be monochromatic light at cca 575nm, see https://en.wikipedia.org/wiki/Shades_of_yellow . If we need to add some defines for that, lets do that. BR, Pavel
diff --git a/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts b/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts index c456e9594ea5..fef7d1d02925 100644 --- a/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts +++ b/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts @@ -7,6 +7,7 @@ #include <dt-bindings/gpio/gpio.h> #include <dt-bindings/input/input.h> +#include <dt-bindings/leds/common.h> #include <dt-bindings/pinctrl/qcom,pmic-gpio.h> #include <dt-bindings/regulator/qcom,rpmh-regulator.h> #include "sm7225.dtsi" @@ -367,6 +368,28 @@ &mpss { firmware-name = "qcom/sm7225/fairphone4/modem.mdt"; }; +&pm6150l_flash { + status = "okay"; + + led-0 { + function = LED_FUNCTION_FLASH; + color = <LED_COLOR_ID_YELLOW>; + led-sources = <1>; + led-max-microamp = <180000>; + flash-max-microamp = <1000000>; + flash-max-timeout-us = <1280000>; + }; + + led-1 { + function = LED_FUNCTION_FLASH; + color = <LED_COLOR_ID_WHITE>; + led-sources = <2>; + led-max-microamp = <180000>; + flash-max-microamp = <1000000>; + flash-max-timeout-us = <1280000>; + }; +}; + &pm6150l_wled { status = "okay";
Configure the pm6150l flash node for the dual flash LEDs found on FP4. Signed-off-by: Luca Weiss <luca.weiss@fairphone.com> --- arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)