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authorManasi Navare <manasi.d.navare@intel.com>2018-11-28 00:41:07 +0300
committerManasi Navare <manasi.d.navare@intel.com>2018-11-28 05:35:17 +0300
commita408c857a92be8b4f9932def15737ced02564e47 (patch)
tree0f87eda644cf700253034e668855754d2b9f2bac /Documentation/gpu
parent082a7b86013c2b8af75fcbf490c55110945673d8 (diff)
downloadlinux-a408c857a92be8b4f9932def15737ced02564e47.tar.xz
drm/dsc: Add helpers for DSC picture parameter set infoframes
According to Display Stream compression spec 1.2, the picture parameter set metadata is sent from source to sink device using the DP Secondary data packet. An infoframe is formed for the PPS SDP header and PPS SDP payload bytes. This patch adds helpers to fill the PPS SDP header and PPS SDP payload according to the DSC 1.2 specification. v7: * Use BUILD_BUG_ON() to protect changing struct size (Ville) * Remove typecaseting (Ville) * Include byteorder.h in drm_dsc.c (Ville) * Correct kernel doc spacing (Anusha) v6: * Use proper sequence points for breaking down the assignments (Chris Wilson) * Use SPDX identifier v5: Do not use bitfields for DRM structs (Jani N) v4: * Use DSC constants for params that dont change across configurations v3: * Add reference to added kernel-docs in Documentation/gpu/drm-kms-helpers.rst (Daniel Vetter) v2: * Add EXPORT_SYMBOL for the drm functions (Manasi) Cc: dri-devel@lists.freedesktop.org Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjala <ville.syrjala@linux.intel.com> Cc: Anusha Srivatsa <anusha.srivatsa@intel.com> Cc: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Manasi Navare <manasi.d.navare@intel.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Reviewed-by: Anusha Srivatsa <anusha.srivatsa@intel.com> Acked-by: Sean Paul <seanpaul@chromium.org> (For merging through drm-intel) Link: https://patchwork.freedesktop.org/patch/msgid/20181127214125.17658-5-manasi.d.navare@intel.com
Diffstat (limited to 'Documentation/gpu')
-rw-r--r--Documentation/gpu/drm-kms-helpers.rst12
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/gpu/drm-kms-helpers.rst b/Documentation/gpu/drm-kms-helpers.rst
index 4b4dc236ef6f..b422eb8edf16 100644
--- a/Documentation/gpu/drm-kms-helpers.rst
+++ b/Documentation/gpu/drm-kms-helpers.rst
@@ -232,6 +232,18 @@ MIPI DSI Helper Functions Reference
.. kernel-doc:: drivers/gpu/drm/drm_mipi_dsi.c
:export:
+Display Stream Compression Helper Functions Reference
+=====================================================
+
+.. kernel-doc:: drivers/gpu/drm/drm_dsc.c
+ :doc: dsc helpers
+
+.. kernel-doc:: include/drm/drm_dsc.h
+ :internal:
+
+.. kernel-doc:: drivers/gpu/drm/drm_dsc.c
+ :export:
+
Output Probing Helper Functions Reference
=========================================