https://github.com/torvalds/linux
Revision 6e8adf6f4a4fa57dd3bef6b70de96e2b7b311204 authored by Ville Syrjälä on 14 November 2018, 13:32:55 UTC, committed by Joonas Lahtinen on 15 November 2018, 11:57:20 UTC
To get the initial phase correct we need to account for the scale
factor as well. I forgot this initially and was mostly looking at
heavily upscaled content where the minor difference between -0.5
and the proper initial phase was not readily apparent.
And let's toss in a comment that tries to explain the formula
a little bit.
v2: The initial phase upper limit is 1.5, not 24.0!
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Fixes: 0a59952b24e2 ("drm/i915: Configure SKL+ scaler initial phase correctly")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181029181820.21956-1-ville.syrjala@linux.intel.com
Tested-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Tested-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> #irc
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> #irc
(cherry picked from commit e7a278a329dd8aa2c70c564849f164cb5673689c)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
1 parent 27971d6
Tip revision: 6e8adf6f4a4fa57dd3bef6b70de96e2b7b311204 authored by Ville Syrjälä on 14 November 2018, 13:32:55 UTC
drm/i915: Account for scale factor when calculating initial phase
drm/i915: Account for scale factor when calculating initial phase
Tip revision: 6e8adf6
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