[Intel-gfx] T100TA Backlight

[Kumar, Shobhit]

Hi
These patches were then submitted to wider lists and reviewed at http://lkml.iu.edu/hypermail/linux/kernel/1504.3/03382.html
Few of them are already merged and few got Acked/Reviwed-By. Rework was pending on couple of them. I am working on the same and updated set can be expected this week.

Regards
Shobhit

From: Brain WrecK [mailto:bloften80 at gmail.com]
Sent: Wednesday, June 17, 2015 10:17 PM
To: Kumar, Shobhit
Cc: intel-gfx at lists.freedesktop.org
Subject: T100TA Backlight

Hello all

I am one of the people who is trying to work on getting linux working on the ASUS T100TA

i am writing this to inquire about the following from the intel-gfx mailing list in regards to the Backlight for the T100TA that you created using the crystalcove PMIC. this was done back in April 2015 and maybe got buried under everything else

do you know if this has been upstreamed yet or when it will be upstreamed?

if not would you be able to send me the patches so we can take advantage of this on the latest 4.1 kernel?

i have copied the message below for your review

thank you for your consideration


Hi All,

Finally I came back to this and tried to address the pending review comments.

Couple of the patches from the older series were merged in linux-next. This

series reworks on the remaining and rebases on linux-next. Basically following

are implemented -



1. GPIO control for panel enable/disable with GFX device as consumer

2. New PWM chip driver added for CRC PMIC based backlight control

3. i915 is modified to use the CRC gpio chip and the CRC PWM chip to do

   backlight control. This is now added in intel_panel.c in the generic

   panel backlight control infrastructure



All these patches have been tested on AsusT100 and working fine using

/sys/class/backlight/intel_backlight interface.



Recently I noticed another device Dell Venue 8 Pro (BYT-CR) which should be

using LPSS backlight control. There is already a LPSS PWM chip driver in

upstream kernel which should be used in this case. That patch is for another

day.



Regards

Shobhit



Shobhit Kumar (8):

  drivers/gpio/gpiolib: Add support for removing registered consumer

    lookup table

  drivers/pwm/core: Add support to remove registered consumer lookup

    tables

  drivers/mfd: Add lookup table for Panel Control as GPIO signal

  drivers/mfd: Add PWM cell device for Crystalcove PMIC

  drivers/mfd: ADD PWM lookup table for CRC PMIC based PWM

  drivers/pwm: Add Crystalcove (CRC) PWM driver

  drm/i915: Use the CRC gpio for panel enable/disable

  drm/i915: Backlight control using CRC PMIC based PWM driver



 drivers/gpio/gpiolib.c             |  13 +++

 drivers/gpu/drm/i915/intel_drv.h   |   5 ++

 drivers/gpu/drm/i915/intel_dsi.c   |  38 ++++++++-

 drivers/gpu/drm/i915/intel_dsi.h   |   6 ++

 drivers/gpu/drm/i915/intel_panel.c |  92 ++++++++++++++++++--

 drivers/mfd/intel_soc_pmic_core.c  |  29 +++++++

 drivers/mfd/intel_soc_pmic_crc.c   |   3 +

 drivers/pwm/Kconfig                |   7 ++

 drivers/pwm/Makefile               |   1 +

 drivers/pwm/core.c                 |  17 ++++

 drivers/pwm/pwm-crc.c              | 171 +++++++++++++++++++++++++++++++++++++

 include/linux/gpio/machine.h       |   1 +

 include/linux/pwm.h                |   5 ++

 13 files changed, 381 insertions(+), 7 deletions(-)

 create mode 100644 drivers/pwm/pwm-crc.c

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx/attachments/20150617/d36a81a1/attachment-0001.html>