Re: PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-06 Thread Daniel Thompson
On 06/07/17 13:41, Paul Kocialkowski wrote: Some panels have a documented powerup sequence, which usually ends with the backlight being enabled to avoid showing garbage before the panel is initialized completely. The reason for 3698d7e7d221 was a device with the display disabled out of the

Re: PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-06 Thread Daniel Thompson
On 06/07/17 13:41, Paul Kocialkowski wrote: Some panels have a documented powerup sequence, which usually ends with the backlight being enabled to avoid showing garbage before the panel is initialized completely. The reason for 3698d7e7d221 was a device with the display disabled out of the

Re: PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-06 Thread Paul Kocialkowski
On Thu, 2017-07-06 at 13:57 +0100, Daniel Thompson wrote: > On 06/07/17 13:41, Paul Kocialkowski wrote: > > > > Some panels have a documented powerup sequence, which usually > > > > ends with > > > > the backlight being enabled to avoid showing garbage before the > > > > panel is > > > >

Re: PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-06 Thread Paul Kocialkowski
On Thu, 2017-07-06 at 13:57 +0100, Daniel Thompson wrote: > On 06/07/17 13:41, Paul Kocialkowski wrote: > > > > Some panels have a documented powerup sequence, which usually > > > > ends with > > > > the backlight being enabled to avoid showing garbage before the > > > > panel is > > > >

Re: PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-06 Thread Paul Kocialkowski
On Wed, 2017-07-05 at 14:47 +0300, Paul Kocialkowski wrote: > Hi, > > On Wed, 2017-07-05 at 13:07 +0200, Philipp Zabel wrote: > > Hi Paul, > > > > On Wed, 2017-07-05 at 13:41 +0300, Paul Kocialkowski wrote: > > > Hey, > > > > > > On Wed, 2017-07-05 at 11:24 +0100, Daniel Thompson wrote: > > > >

Re: PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-06 Thread Paul Kocialkowski
On Wed, 2017-07-05 at 14:47 +0300, Paul Kocialkowski wrote: > Hi, > > On Wed, 2017-07-05 at 13:07 +0200, Philipp Zabel wrote: > > Hi Paul, > > > > On Wed, 2017-07-05 at 13:41 +0300, Paul Kocialkowski wrote: > > > Hey, > > > > > > On Wed, 2017-07-05 at 11:24 +0100, Daniel Thompson wrote: > > > >

Re: PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-05 Thread Paul Kocialkowski
Hi, On Wed, 2017-07-05 at 13:07 +0200, Philipp Zabel wrote: > Hi Paul, > > On Wed, 2017-07-05 at 13:41 +0300, Paul Kocialkowski wrote: > > Hey, > > > > On Wed, 2017-07-05 at 11:24 +0100, Daniel Thompson wrote: > > > On 04/07/17 21:13, Paul Kocialkowski wrote: > > > > As I try to maintain

Re: PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-05 Thread Paul Kocialkowski
Hi, On Wed, 2017-07-05 at 13:07 +0200, Philipp Zabel wrote: > Hi Paul, > > On Wed, 2017-07-05 at 13:41 +0300, Paul Kocialkowski wrote: > > Hey, > > > > On Wed, 2017-07-05 at 11:24 +0100, Daniel Thompson wrote: > > > On 04/07/17 21:13, Paul Kocialkowski wrote: > > > > As I try to maintain

Re: PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-05 Thread Philipp Zabel
Hi Paul, On Wed, 2017-07-05 at 13:41 +0300, Paul Kocialkowski wrote: > Hey, > > On Wed, 2017-07-05 at 11:24 +0100, Daniel Thompson wrote: > > On 04/07/17 21:13, Paul Kocialkowski wrote: > > > As I try to maintain support for ARM CrOS (read, ChromeOS/ChromiumOS) > > > devices in > > > upstream

Re: PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-05 Thread Philipp Zabel
Hi Paul, On Wed, 2017-07-05 at 13:41 +0300, Paul Kocialkowski wrote: > Hey, > > On Wed, 2017-07-05 at 11:24 +0100, Daniel Thompson wrote: > > On 04/07/17 21:13, Paul Kocialkowski wrote: > > > As I try to maintain support for ARM CrOS (read, ChromeOS/ChromiumOS) > > > devices in > > > upstream

Re: PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-05 Thread Paul Kocialkowski
Hey, On Wed, 2017-07-05 at 11:24 +0100, Daniel Thompson wrote: > On 04/07/17 21:13, Paul Kocialkowski wrote: > > As I try to maintain support for ARM CrOS (read, ChromeOS/ChromiumOS) > > devices in > > upstream Linux on my spare time, I try to test out rc and stable versions as > > often as time

Re: PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-05 Thread Paul Kocialkowski
Hey, On Wed, 2017-07-05 at 11:24 +0100, Daniel Thompson wrote: > On 04/07/17 21:13, Paul Kocialkowski wrote: > > As I try to maintain support for ARM CrOS (read, ChromeOS/ChromiumOS) > > devices in > > upstream Linux on my spare time, I try to test out rc and stable versions as > > often as time

Re: PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-05 Thread Daniel Thompson
On 04/07/17 21:13, Paul Kocialkowski wrote: As I try to maintain support for ARM CrOS (read, ChromeOS/ChromiumOS) devices in upstream Linux on my spare time, I try to test out rc and stable versions as often as time allows. I have been rolling out 4.12 since Monday and noticed that the backlight

Re: PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-05 Thread Daniel Thompson
On 04/07/17 21:13, Paul Kocialkowski wrote: As I try to maintain support for ARM CrOS (read, ChromeOS/ChromiumOS) devices in upstream Linux on my spare time, I try to test out rc and stable versions as often as time allows. I have been rolling out 4.12 since Monday and noticed that the backlight

PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-04 Thread Paul Kocialkowski
As I try to maintain support for ARM CrOS (read, ChromeOS/ChromiumOS) devices in upstream Linux on my spare time, I try to test out rc and stable versions as often as time allows. I have been rolling out 4.12 since Monday and noticed that the backlight on my tegra124 nyan big stayed dark for this

PWM backlight initial state assumptions, or how pwm_bl killed my (nyan) cat^W backlight support

2017-07-04 Thread Paul Kocialkowski
As I try to maintain support for ARM CrOS (read, ChromeOS/ChromiumOS) devices in upstream Linux on my spare time, I try to test out rc and stable versions as often as time allows. I have been rolling out 4.12 since Monday and noticed that the backlight on my tegra124 nyan big stayed dark for this