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| author | Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com> | 2020-10-20 21:44:23 +0530 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2020-10-21 12:19:54 +0300 |
| commit | 5c759eda9b04cd1047b4cda8ac1eaadf8a9e4fce (patch) | |
| tree | 9c09dbd275912c35e53d48ed5c9e9162c14b1c7b /drivers/gpu/drm/drm_blend.c | |
| parent | e7fc3f902d76f1c5f6e226f951a03a796e6763df (diff) | |
| download | linux-stable-5c759eda9b04cd1047b4cda8ac1eaadf8a9e4fce.tar.gz linux-stable-5c759eda9b04cd1047b4cda8ac1eaadf8a9e4fce.tar.bz2 linux-stable-5c759eda9b04cd1047b4cda8ac1eaadf8a9e4fce.zip | |
drm: Introduce plane and CRTC scaling filter properties
Introduce per-plane and per-CRTC scaling filter properties to allow
userspace to select the driver's default scaling filter or
Nearest-neighbor(NN) filter for upscaling operations on CRTC and
plane.
Drivers can set up this property for a plane by calling
drm_plane_create_scaling_filter() and for a CRTC by calling
drm_crtc_create_scaling_filter().
NN filter works by filling in the missing color values in the upscaled
image with that of the coordinate-mapped nearest source pixel value.
NN filter for integer multiple scaling can be particularly useful for
for pixel art games that rely on sharp, blocky images to deliver their
distinctive look.
changes since: v6:
* Move property doc to existing "Standard CRTC Properties" and
"Plane Composition Properties" doc comments (Simon)
changes since v3:
* Refactor code, add new function for common code (Ville)
changes since v2:
* Create per-plane and per-CRTC scaling filter property (Ville)
changes since v1:
* None
changes since RFC:
* Add separate properties for plane and CRTC (Ville)
Link: https://github.com/xbmc/xbmc/pull/18194
Link: https://github.com/xbmc/xbmc/pull/18567
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Simon Ser <contact@emersion.fr>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201020161427.6941-2-pankaj.laxminarayan.bharadiya@intel.com
Diffstat (limited to 'drivers/gpu/drm/drm_blend.c')
| -rw-r--r-- | drivers/gpu/drm/drm_blend.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_blend.c b/drivers/gpu/drm/drm_blend.c index f1dcad96f341..ae2234aae93d 100644 --- a/drivers/gpu/drm/drm_blend.c +++ b/drivers/gpu/drm/drm_blend.c @@ -194,6 +194,19 @@ * Note that all the property extensions described here apply either to the * plane or the CRTC (e.g. for the background color, which currently is not * exposed and assumed to be black). + * + * SCALING_FILTER: + * + * Indicates scaling filter to be used for plane scaler + * + * The value of this property can be one of the following: + * Default: + * Driver's default scaling filter + * Nearest Neighbor: + * Nearest Neighbor scaling filter + * + * Drivers can set up this property for a plane by calling + * drm_plane_create_scaling_filter_property */ /** |