Re: [PATCH] drm/gamma: Clarify gamma lut uapi

2019-04-02 Thread Daniel Vetter
On Fri, Mar 29, 2019 at 10:20:27AM +0100, Daniel Vetter wrote: > Interpreting it as a 0.16 fixed point means we can't accurately > represent 1.0. Which is one of the values we really should be able to > represent. > > Since most (all?) luts have lower precision this will only affect > rounding of

Re: [PATCH] drm/gamma: Clarify gamma lut uapi

2019-03-29 Thread Maarten Lankhorst
Op 29-03-2019 om 10:20 schreef Daniel Vetter: > Interpreting it as a 0.16 fixed point means we can't accurately > represent 1.0. Which is one of the values we really should be able to > represent. > > Since most (all?) luts have lower precision this will only affect > rounding of 0x. > > Cc:

Re: [PATCH] drm/gamma: Clarify gamma lut uapi

2019-03-29 Thread Philippe CORNU
On 3/29/19 10:20 AM, Daniel Vetter wrote: > Interpreting it as a 0.16 fixed point means we can't accurately > represent 1.0. Which is one of the values we really should be able to > represent. > > Since most (all?) luts have lower precision this will only affect > rounding of 0x. > > Cc:

Re: [PATCH] drm/gamma: Clarify gamma lut uapi

2019-03-29 Thread Matt Roper
On Fri, Mar 29, 2019 at 10:20:27AM +0100, Daniel Vetter wrote: > Interpreting it as a 0.16 fixed point means we can't accurately > represent 1.0. Which is one of the values we really should be able to > represent. > > Since most (all?) luts have lower precision this will only affect > rounding of

Re: [PATCH] drm/gamma: Clarify gamma lut uapi

2019-03-29 Thread Lionel Landwerlin
On 29/03/2019 09:20, Daniel Vetter wrote: Interpreting it as a 0.16 fixed point means we can't accurately represent 1.0. Which is one of the values we really should be able to represent. Since most (all?) luts have lower precision this will only affect rounding of 0x. Cc: Uma Shankar Cc:

Re: [PATCH] drm/gamma: Clarify gamma lut uapi

2019-03-29 Thread Liviu Dudau
On Fri, Mar 29, 2019 at 10:20:27AM +0100, Daniel Vetter wrote: > Interpreting it as a 0.16 fixed point means we can't accurately > represent 1.0. Which is one of the values we really should be able to > represent. > > Since most (all?) luts have lower precision this will only affect > rounding of

[PATCH] drm/gamma: Clarify gamma lut uapi

2019-03-29 Thread Daniel Vetter
Interpreting it as a 0.16 fixed point means we can't accurately represent 1.0. Which is one of the values we really should be able to represent. Since most (all?) luts have lower precision this will only affect rounding of 0x. Cc: Uma Shankar Cc: Ville Syrjälä Cc: Shashank Sharma Cc: