[Intel-gfx] [v2][PATCH 2/3] drm/i915/display: Extract icl_read_luts()

[Jani Nikula]

On Wed, 18 Sep 2019, "Sharma, Swati2" <swati2.sharma at intel.com> wrote:
> On 18-Sep-19 3:31 PM, Jani Nikula wrote:
>> On Tue, 17 Sep 2019, Swati Sharma <swati2.sharma at intel.com> wrote:
>>> For icl+, have hw read out to create hw blob of gamma
>>> lut values. icl+ platforms supports multi segmented gamma
>>> mode, add hw lut creation for this mode.
>>>
>>> This will be used to validate gamma programming using dsb
>>> (display state buffer) which is a tgl feature.
>>>
>>> v2: -readout code for multisegmented gamma has to come
>>>       up with some intermediate entries that aren't preserved
>>>       in hardware (Jani N)
>>>      -linear interpolation (Ville)
>>>      -moved common code to check gamma_enable to specific funcs,
>>>       since icl doesn't support that
>>>
>>> Signed-off-by: Swati Sharma <swati2.sharma at intel.com>
>>> ---
>>>   drivers/gpu/drm/i915/display/intel_color.c | 243 ++++++++++++++++++++++++++---
>>>   drivers/gpu/drm/i915/i915_reg.h            |   7 +
>>>   2 files changed, 230 insertions(+), 20 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
>>> index b1f0f7e..0008011 100644
>>> --- a/drivers/gpu/drm/i915/display/intel_color.c
>>> +++ b/drivers/gpu/drm/i915/display/intel_color.c
>>> @@ -1370,6 +1370,9 @@ static int icl_color_check(struct intel_crtc_state *crtc_state)
>>>   
>>>   static int i9xx_gamma_precision(const struct intel_crtc_state *crtc_state)
>>>   {
>>> +	if (!crtc_state->gamma_enable)
>>> +		return 0;    >> +
>> 
>> Why are you moving these checks back to the individual functions?
> As stated in commit message, moved common code to check gamma_enable to 
> specific funcs, since icl doesn't support gamma_enable and code will 
> return 0. If i need to make it generic, i need to make gamma_enable true 
> in icl_color_check() func. Is it fine? ICL enables gamma through 
> gamma_mode unlike other platforms.

Argh. Right. Okay, let's go with what you have in this patch. We can
clean this stuff up later.

Please write the main part of the commit message such that it is
independent of the changelog. The changelog is good, but the actual
changes need to be evident from the message part.

BR,
Jani.

-- 
Jani Nikula, Intel Open Source Graphics Center