[Intel-gfx] [PATCH 1/2] drm/i915: Add missing scanline case for 8 cpp watermarks.

[Maarten Lankhorst]

Op 21-03-2019 om 11:29 schreef Ville Syrjälä:
> On Thu, Mar 21, 2019 at 10:15:45AM +0100, Maarten Lankhorst wrote:
>> Now that we can rotate 64 bpp formats, we need to add the rotation case.
>> This wasn't caught by CI or me, because the rotated formats were skipping
>> because the rotated watermarks exceeded the allocation limits.
>>
>> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
>> ---
>>  drivers/gpu/drm/i915/intel_pm.c | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
>> index fcd3baff8b65..5977dca2c55d 100644
>> --- a/drivers/gpu/drm/i915/intel_pm.c
>> +++ b/drivers/gpu/drm/i915/intel_pm.c
>> @@ -4689,6 +4689,9 @@ skl_compute_wm_params(const struct intel_crtc_state *crtc_state,
>>  		case 4:
>>  			wp->y_min_scanlines = 4;
>>  			break;
>> +		case 8:
>> +			wp->y_min_scanlines = 2;
>> +			break;
> Spec says n/a here. And indeed the table says 90/270 is not supported
> with any 64bpp format.

Indeed. Looks like rotation is not allowed for Y41x/Y21x, will drop this patch and tighten restrictions instead. :)