Searched hist:"3 b4e16eb530aa3eaa29535a7d511c105c0de963a" (Results 1 – 2 of 2) sorted by relevance
| /rk3399_rockchip-uboot/drivers/video/ |
| H A D | am335x-fb.h | 3b4e16eb530aa3eaa29535a7d511c105c0de963a Tue Feb 03 12:22:23 UTC 2015 Hannes Petermaier <oe5hpm@oevsv.at> drivers/video/am335x-fb: Add possibility to wait for stable power/picture
Often on boards exists a circuit which switches power on/off to LCD display.
Due to the need of limiting the in-rush current the output voltage from this
circuit rises "slowly", so it is necessary to wait a bit (VCC ramp up time)
before starting output on LCD-pins.
This time is specified in <n> ms within the panel-settings, called "pup_delay"
Further some LCDs need a couple of frames to stabilize the image on it.
We have now the possibility to wait some time after starting output on LCD.
This time is also specified in <n> ms within panel-settings, called "pon_delay"
Signed-off-by: Hannes Petermaier <oe5hpm@oevsv.at>
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| H A D | am335x-fb.c | 3b4e16eb530aa3eaa29535a7d511c105c0de963a Tue Feb 03 12:22:23 UTC 2015 Hannes Petermaier <oe5hpm@oevsv.at> drivers/video/am335x-fb: Add possibility to wait for stable power/picture
Often on boards exists a circuit which switches power on/off to LCD display.
Due to the need of limiting the in-rush current the output voltage from this
circuit rises "slowly", so it is necessary to wait a bit (VCC ramp up time)
before starting output on LCD-pins.
This time is specified in <n> ms within the panel-settings, called "pup_delay"
Further some LCDs need a couple of frames to stabilize the image on it.
We have now the possibility to wait some time after starting output on LCD.
This time is also specified in <n> ms within panel-settings, called "pon_delay"
Signed-off-by: Hannes Petermaier <oe5hpm@oevsv.at>
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