Hi Pavel,
On Mon, Jun 17, 2019 at 03:01:51PM +0200, Pavel Machek wrote:
> Hi!
>
> > > Certainly "linear" (this device will work more or less correctly if the
> > > userspace applies perceptual curves). Not sure about logarithmic since
> > > what is actually useful is something that is
Hi!
> > Certainly "linear" (this device will work more or less correctly if the
> > userspace applies perceptual curves). Not sure about logarithmic since
> > what is actually useful is something that is "perceptually linear"
> > (logarithmic is merely a way to approximate that).
> >
> > I do
On Wed, Jun 12, 2019 at 08:47:57PM +0100, Daniel Thompson wrote:
> On Wed, Jun 12, 2019 at 12:26:42PM -0700, Matthias Kaehlcke wrote:
> > Hi Daniel,
> >
> > On Wed, Jun 12, 2019 at 12:03:25PM +0100, Daniel Thompson wrote:
> > > On Tue, Jun 11, 2019 at 03:30:19PM -0700, Matthias Kaehlcke wrote:
>
On Wed, Jun 12, 2019 at 12:26:42PM -0700, Matthias Kaehlcke wrote:
> Hi Daniel,
>
> On Wed, Jun 12, 2019 at 12:03:25PM +0100, Daniel Thompson wrote:
> > On Tue, Jun 11, 2019 at 03:30:19PM -0700, Matthias Kaehlcke wrote:
> > > On Tue, Jun 11, 2019 at 09:55:30AM -0700, Brian Norris wrote:
> > > >
Hi Daniel,
On Wed, Jun 12, 2019 at 12:03:25PM +0100, Daniel Thompson wrote:
> On Tue, Jun 11, 2019 at 03:30:19PM -0700, Matthias Kaehlcke wrote:
> > On Tue, Jun 11, 2019 at 09:55:30AM -0700, Brian Norris wrote:
> > > On Tue, Jun 11, 2019 at 3:49 AM Daniel Thompson
> > > wrote:
> > > > This is a
On Tue, Jun 11, 2019 at 03:30:19PM -0700, Matthias Kaehlcke wrote:
> On Tue, Jun 11, 2019 at 09:55:30AM -0700, Brian Norris wrote:
> > On Tue, Jun 11, 2019 at 3:49 AM Daniel Thompson
> > wrote:
> > > This is a long standing flaw in the backlight interfaces. AFAIK generic
> > > userspaces end up
On Tue 2019-06-11 15:30:19, Matthias Kaehlcke wrote:
> On Tue, Jun 11, 2019 at 09:55:30AM -0700, Brian Norris wrote:
> > On Tue, Jun 11, 2019 at 3:49 AM Daniel Thompson
> > wrote:
> > > This is a long standing flaw in the backlight interfaces. AFAIK generic
> > > userspaces end up with a (flawed)
On Tue, Jun 11, 2019 at 09:55:30AM -0700, Brian Norris wrote:
> On Tue, Jun 11, 2019 at 3:49 AM Daniel Thompson
> wrote:
> > This is a long standing flaw in the backlight interfaces. AFAIK generic
> > userspaces end up with a (flawed) heuristic.
>
> Bingo! Would be nice if we could start to fix
On Tue, Jun 11, 2019 at 3:49 AM Daniel Thompson
wrote:
> This is a long standing flaw in the backlight interfaces. AFAIK generic
> userspaces end up with a (flawed) heuristic.
Bingo! Would be nice if we could start to fix this long-standing flaw.
> Basically devices with a narrow range of
On Mon, Jun 10, 2019 at 01:52:33PM -0700, Matthias Kaehlcke wrote:
> Hi Pavel,
>
> On Sat, Jun 08, 2019 at 11:02:26PM +0200, Pavel Machek wrote:
> > Hi!
> >
> > > > +* Note that this method is based on empirical testing on
> > > > different
> > > > +* devices with PWM of 8 and
On Mon, Jun 10, 2019 at 11:02:27PM +0200, Enric Balletbo i Serra wrote:
> Hi Matthias,
>
> On 10/6/19 22:39, Matthias Kaehlcke wrote:
> > Hi Enric
> >
> > On Mon, Jun 10, 2019 at 12:00:02PM +0200, Enric Balletbo i Serra wrote:
> >> Hi Matthias,
> >>
> >> On 8/6/19 23:02, Pavel Machek wrote:
>
Hi Matthias,
On 10/6/19 22:39, Matthias Kaehlcke wrote:
> Hi Enric
>
> On Mon, Jun 10, 2019 at 12:00:02PM +0200, Enric Balletbo i Serra wrote:
>> Hi Matthias,
>>
>> On 8/6/19 23:02, Pavel Machek wrote:
>>> Hi!
>>>
> + * Note that this method is based on empirical testing on different
>
Hi Pavel,
On Sat, Jun 08, 2019 at 11:02:26PM +0200, Pavel Machek wrote:
> Hi!
>
> > > + * Note that this method is based on empirical testing on different
> > > + * devices with PWM of 8 and 16 bits of resolution.
> > > + */
> > > + n = period;
> > > + while (n) {
> > > + counter += n
Hi Enric
On Mon, Jun 10, 2019 at 12:00:02PM +0200, Enric Balletbo i Serra wrote:
> Hi Matthias,
>
> On 8/6/19 23:02, Pavel Machek wrote:
> > Hi!
> >
> >>> + * Note that this method is based on empirical testing on different
> >>> + * devices with PWM of 8 and 16 bits of resolution.
> >>> +
Hi Matthias,
On 8/6/19 23:02, Pavel Machek wrote:
> Hi!
>
>>> +* Note that this method is based on empirical testing on different
>>> +* devices with PWM of 8 and 16 bits of resolution.
>>> +*/
>>> + n = period;
>>> + while (n) {
>>> + counter += n % 2;
>>> +
Hi!
> > +* Note that this method is based on empirical testing on different
> > +* devices with PWM of 8 and 16 bits of resolution.
> > +*/
> > + n = period;
> > + while (n) {
> > + counter += n % 2;
> > + n >>= 1;
> > + }
>
> I don't quite follow the
Hi Enric,
some comments inline, a bit late, but I just tested this on veyron
minnie.
On Thu, Feb 08, 2018 at 12:30:31PM +0100, Enric Balletbo i Serra wrote:
> When you want to change the brightness using a PWM signal, one thing you
> need to consider is how human perceive the brightness. Human
When you want to change the brightness using a PWM signal, one thing you
need to consider is how human perceive the brightness. Human perceive
the brightness change non-linearly, we have better sensitivity at low
luminance than high luminance, so to achieve perceived linear dimming,
the brightness
When you want to change the brightness using a PWM signal, one thing you
need to consider is how human perceive the brightness. Human perceive
the brightness change non-linearly, we have better sensitivity at low
luminance than high luminance, so to achieve perceived linear dimming,
the brightness
On Thu, Feb 08, 2018 at 12:30:31PM +0100, Enric Balletbo i Serra wrote:
> When you want to change the brightness using a PWM signal, one thing you
> need to consider is how human perceive the brightness. Human perceive
> the brightness change non-linearly, we have better sensitivity at low
>
On Thu, Feb 08, 2018 at 12:30:31PM +0100, Enric Balletbo i Serra wrote:
> When you want to change the brightness using a PWM signal, one thing you
> need to consider is how human perceive the brightness. Human perceive
> the brightness change non-linearly, we have better sensitivity at low
>
When you want to change the brightness using a PWM signal, one thing you
need to consider is how human perceive the brightness. Human perceive
the brightness change non-linearly, we have better sensitivity at low
luminance than high luminance, so to achieve perceived linear dimming,
the brightness
When you want to change the brightness using a PWM signal, one thing you
need to consider is how human perceive the brightness. Human perceive
the brightness change non-linearly, we have better sensitivity at low
luminance than high luminance, so to achieve perceived linear dimming,
the brightness
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