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f1d6aec4 |
| 16-Apr-2024 |
Imre Deak <imre.deak@intel.com> |
drm/i915/dp: Fix DSC line buffer depth programming
Fix the calculation of the DSC line buffer depth. This is limited both by the source's and sink's maximum line buffer depth, but the former one was
drm/i915/dp: Fix DSC line buffer depth programming
Fix the calculation of the DSC line buffer depth. This is limited both by the source's and sink's maximum line buffer depth, but the former one was not taken into account. On all Intel platform's the source's maximum buffer depth is 13, so the overall limit is simply the minimum of the source/sink's limit, regardless of the DSC version.
This leaves the DSI DSC line buffer depth calculation as-is, trusting VBT.
On DSC version 1.2 for sinks reporting a maximum line buffer depth of 16 the line buffer depth was incorrectly programmed as 0, leading to a corruption in color gradients / lines on the decompressed screen image.
Cc: dri-devel@lists.freedesktop.org Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com> Reviewed-by: Manasi Navare <navaremanasi@chromium.org> Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240416221010.376865-2-imre.deak@intel.com
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2a64b147 |
| 21-Apr-2022 |
Thomas Zimmermann <tzimmermann@suse.de> |
drm/display: Move DSC header and helpers into display-helper module
DSC is the Display Stream Compression standard for DisplayPort. Move the DSC code into display/ and split the header into files fo
drm/display: Move DSC header and helpers into display-helper module
DSC is the Display Stream Compression standard for DisplayPort. Move the DSC code into display/ and split the header into files for protocol core and DRM helpers. Adapt all users of the code. No functional changes.
To avoid the proliferation of Kconfig options, DSC is part of DRM's support for DisplayPort. If necessary, a new option could make DSC an independent feature.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220421073108.19226-6-tzimmermann@suse.de
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