Re: [PATCH 20/22] drm/i915: BDW: Load degamma correction values

["Sharma, Shashank" <shashank.sharma@intel.com>]

Regards
Shashank

On 10/12/2015 11:43 PM, Rob Bradford wrote:
> On Sat, 2015-10-10 at 00:59 +0530, Shashank Sharma wrote:
>> I915 color manager registers pipe degamma correction as palette
>> correction before CTM, DRM property.
>>
>> This patch adds the no of coefficients(65) for degamma correction
>> as "num_samples_before_ctm" parameter in device info structures,
>> for BDW and higher platforms.
>
> Did you copy and paste this from the CHV version? The only constant you
> add for degamma here is 512?
Oops, side effects of too many code-refactoring without proper sleep :) 
will fix this.
>
> Rob
>
>>
>> Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
>> Signed-off-by: Kausal Malladi <kausalmalladi@gmail.com>
>> ---
>>   drivers/gpu/drm/i915/i915_drv.c            | 7 +++++++
>>   drivers/gpu/drm/i915/intel_color_manager.h | 3 +++
>>   2 files changed, 10 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/i915/i915_drv.c
>> b/drivers/gpu/drm/i915/i915_drv.c
>> index 4fa046f..ebf4910 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.c
>> +++ b/drivers/gpu/drm/i915/i915_drv.c
>> @@ -303,6 +303,7 @@ static const struct intel_device_info
>> intel_broadwell_d_info = {
>>   	.need_gfx_hws = 1, .has_hotplug = 1,
>>   	.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
>>   	.num_samples_after_ctm = BDW_SPLITGAMMA_MAX_VALS,
>> +	.num_samples_before_ctm = BDW_DEGAMMA_MAX_VALS,
>>   	.has_llc = 1,
>>   	.has_ddi = 1,
>>   	.has_fpga_dbg = 1,
>> @@ -316,6 +317,7 @@ static const struct intel_device_info
>> intel_broadwell_m_info = {
>>   	.need_gfx_hws = 1, .has_hotplug = 1,
>>   	.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
>>   	.num_samples_after_ctm = BDW_SPLITGAMMA_MAX_VALS,
>> +	.num_samples_before_ctm = BDW_DEGAMMA_MAX_VALS,
>>   	.has_llc = 1,
>>   	.has_ddi = 1,
>>   	.has_fpga_dbg = 1,
>> @@ -329,6 +331,7 @@ static const struct intel_device_info
>> intel_broadwell_gt3d_info = {
>>   	.need_gfx_hws = 1, .has_hotplug = 1,
>>   	.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING
>> | BSD2_RING,
>>   	.num_samples_after_ctm = BDW_SPLITGAMMA_MAX_VALS,
>> +	.num_samples_before_ctm = BDW_DEGAMMA_MAX_VALS,
>>   	.has_llc = 1,
>>   	.has_ddi = 1,
>>   	.has_fpga_dbg = 1,
>> @@ -342,6 +345,7 @@ static const struct intel_device_info
>> intel_broadwell_gt3m_info = {
>>   	.need_gfx_hws = 1, .has_hotplug = 1,
>>   	.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING
>> | BSD2_RING,
>>   	.num_samples_after_ctm = BDW_SPLITGAMMA_MAX_VALS,
>> +	.num_samples_before_ctm = BDW_DEGAMMA_MAX_VALS,
>>   	.has_llc = 1,
>>   	.has_ddi = 1,
>>   	.has_fpga_dbg = 1,
>> @@ -368,6 +372,7 @@ static const struct intel_device_info
>> intel_skylake_info = {
>>   	.need_gfx_hws = 1, .has_hotplug = 1,
>>   	.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
>>   	.num_samples_after_ctm = BDW_SPLITGAMMA_MAX_VALS,
>> +	.num_samples_before_ctm = BDW_DEGAMMA_MAX_VALS,
>>   	.has_llc = 1,
>>   	.has_ddi = 1,
>>   	.has_fpga_dbg = 1,
>> @@ -382,6 +387,7 @@ static const struct intel_device_info
>> intel_skylake_gt3_info = {
>>   	.need_gfx_hws = 1, .has_hotplug = 1,
>>   	.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING
>> | BSD2_RING,
>>   	.num_samples_after_ctm = BDW_SPLITGAMMA_MAX_VALS,
>> +	.num_samples_before_ctm = BDW_DEGAMMA_MAX_VALS,
>>   	.has_llc = 1,
>>   	.has_ddi = 1,
>>   	.has_fpga_dbg = 1,
>> @@ -396,6 +402,7 @@ static const struct intel_device_info
>> intel_broxton_info = {
>>   	.need_gfx_hws = 1, .has_hotplug = 1,
>>   	.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
>>   	.num_samples_after_ctm = BDW_SPLITGAMMA_MAX_VALS,
>> +	.num_samples_before_ctm = BDW_DEGAMMA_MAX_VALS,
>>   	.num_pipes = 3,
>>   	.has_ddi = 1,
>>   	.has_fpga_dbg = 1,
>> diff --git a/drivers/gpu/drm/i915/intel_color_manager.h
>> b/drivers/gpu/drm/i915/intel_color_manager.h
>> index 6c7cb08..e0c486e 100644
>> --- a/drivers/gpu/drm/i915/intel_color_manager.h
>> +++ b/drivers/gpu/drm/i915/intel_color_manager.h
>> @@ -98,3 +98,6 @@
>>   #define BDW_MAX_GAMMA                         ((1 << 24) - 1)
>>   #define BDW_INDEX_AUTO_INCREMENT               (1 << 15)
>>   #define BDW_INDEX_SPLIT_MODE                   (1 << 31)
>> +
>> +/* Degamma on BDW */
>> +#define BDW_DEGAMMA_MAX_VALS                   512
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