diff options
| author | Bhanuprakash Modem <bhanuprakash.modem@intel.com> | 2021-07-09 21:29:45 +0530 |
|---|---|---|
| committer | Swati Sharma <swati2.sharma@intel.com> | 2021-07-09 17:21:03 +0530 |
| commit | cd63c83e23789eb194d38b8d272247a88122f2f6 (patch) | |
| tree | b2ddcd4499c04b618f4cdcd8e17540716d3020b1 /tests/meson.build | |
| parent | b5c6b973e7f7d33e7521825e39ddd380e80af01a (diff) | |
tests/kms_dither: New IGT to validate crtc Dithering
Many of the display devices have color format support less than
the color format of the input data (Ex: 8-bit input data and 6-bit
display color depth). Then the input data will be either truncated
or rounded, but this approach usually causes loss of detail and also
produce large banded areas of a single color that significantly
differs from the original image.
Dithering is a technique used to enhance these colors by creating the
illusion of smoothness by adjusting the nearby pixel color.
For Eg: Converting 8-bit to 6-bit by modifying the pixel information.
Dithering should be enabled when a panel color depth is lower than the
color depth of the framebuffer.
Even though feature Dithering is there since legacy, there is no
specific IGT for this. This patch will create New IGT for Dithering.
And below is the truth table for CRTC Dithering.
|----------------|---------|-------------|
| Frame buffer | Panel | Dithering |
|----------------|---------|-------------|
| 8 BPC | 6 BPC | Yes |
|----------------|---------|-------------|
| 8 BPC | 8 BPC | No |
|----------------|---------|-------------|
| 8 BPC | 10 BPC | No |
|----------------|---------|-------------|
| 10 BPC | 6 BPC | Yes |
|----------------|---------|-------------|
| 10 BPC | 8 BPC | Yes |
|----------------|---------|-------------|
| 10 BPC | 10 BPC | No |
|----------------|---------|-------------|
| 16 BPC | 6 BPC | Yes |
|----------------|---------|-------------|
| 16 BPC | 8 BPC | Yes |
|----------------|---------|-------------|
| 16 BPC | 10 BPC | Yes |
|----------------|---------|-------------|
As i915 enables dithering for 6 bpc panels only, we need to limit the
execution to 6 & 8 bpc panels (Negative testing) only.
V2:
* Connector MAX_BPC prop is mandatory (Uma)
* Test commit for connector caps (Uma)
Cc: Swati Sharma <swati2.sharma@intel.com>
Cc: Uma Shankar <uma.shankar@intel.com>
Cc: Nischal Varide <nischal.varide@intel.com>
Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Diffstat (limited to 'tests/meson.build')
| -rw-r--r-- | tests/meson.build | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tests/meson.build b/tests/meson.build index 01911c45..d3de40be 100644 --- a/tests/meson.build +++ b/tests/meson.build @@ -29,6 +29,7 @@ test_progs = [ 'kms_cursor_crc', 'kms_cursor_edge_walk', 'kms_cursor_legacy', + 'kms_dither', 'kms_dp_aux_dev', 'kms_dp_dsc', 'kms_dp_tiled_display', |