[v2 2/7] drm/i915: Define color lut range structure

[Shankar, Uma]

>-----Original Message-----
>From: Ville Syrjälä [mailto:ville.syrjala at linux.intel.com]
>Sent: Monday, April 8, 2019 3:39 PM
>To: Shankar, Uma <uma.shankar at intel.com>
>Cc: intel-gfx at lists.freedesktop.org; dri-devel at lists.freedesktop.org; Lankhorst,
>Maarten <maarten.lankhorst at intel.com>; Syrjala, Ville <ville.syrjala at intel.com>;
>Sharma, Shashank <shashank.sharma at intel.com>; emil.l.velikov at gmail.com;
>brian.starkey at arm.com; dcastagna at chromium.org; seanpaul at chromium.org;
>harry.wentland at amd.com; Roper, Matthew D <matthew.d.roper at intel.com>
>Subject: Re: [v2 2/7] drm/i915: Define color lut range structure
>
>On Mon, Apr 01, 2019 at 11:00:06PM +0530, Uma Shankar wrote:
>> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>>
>> This defines the color lut ranges for 10bit and multi segmented gamma
>> range for ICL.
>>
>> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
>> Signed-off-by: Uma Shankar <uma.shankar at intel.com>
>> ---
>>  drivers/gpu/drm/i915/intel_color.c | 301
>> ++++++++++++++++++++++++++++++++++++-
>>  1 file changed, 297 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_color.c
>> b/drivers/gpu/drm/i915/intel_color.c
>> index f2907cf..84d93ec 100644
>> --- a/drivers/gpu/drm/i915/intel_color.c
>> +++ b/drivers/gpu/drm/i915/intel_color.c
>> @@ -1083,9 +1083,279 @@ static int icl_color_check(struct intel_crtc_state
>*crtc_state)
>>  	return 0;
>>  }
>>
>> +enum {
>> +	I9XX_LUT_SIZE_8BIT = 256,
>> +	I9XX_LUT_SIZE_10BIT = 129,
>> +
>> +	ILK_LUT_SIZE_10BIT = 1024,
>> +	ILK_LUT_SIZE_12BIT = 513,
>> +
>> +	IVB_LUT_SIZE_SPLIT = 512,
>> +
>> +	CHV_LUT_SIZE_CGM_DEGAMMA = 65,
>> +	CHV_LUT_SIZE_CGM_GAMMA = 257,
>> +};
>> +
>> +#define I9XX_GAMMA_8 \
>> +	{ \
>> +		.flags = DRM_MODE_LUT_GAMMA, \
>> +		.count = 256, \
>> +		.input_bpc = 8, .output_bpc = 8, \
>> +		.start = 0, .end = (1 << 8) - 1, \
>> +		.min = 0, .max = (1 << 8) - 1, \
>> +	}
>> +
>> +static const struct drm_color_lut_range i9xx_gamma_8[] = {
>> +	I9XX_GAMMA_8,
>> +};
>> +
>> +static const struct drm_color_lut_range i9xx_gamma_10_slope[] = {
>> +	{
>> +		.flags = (DRM_MODE_LUT_GAMMA |
>> +			  DRM_MODE_LUT_INTERPOLATE |
>> +			  DRM_MODE_LUT_NON_DECREASING),
>> +		.count = 129,
>> +		.input_bpc = 10, .output_bpc = 10,
>> +		.start = 0, .end = 1 << 10,
>> +		.min = 0, .max = (1 << 10) - 1,
>> +	},
>> +};
>
>Step 1 should probably be to advertise these for the gamma modes we currently have,
>on every platform.

Ok, focussed here mainly on multi-segmented gamma. But will add all the gamma modes
supported on various platforms.

>--
>Ville Syrjälä
>Intel