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drm: Add SCDC helpers

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SCDC is a mechanism defined in the HDMI 2.0 specification that allows
the source and sink devices to communicate.

This commit introduces helpers to access the SCDC and provides the
symbolic names for the various registers defined in the specification.

V2: Rebase.
V3: Added R-B from Jose.
V4: Rebase
V5: Addressed review comments from Ville
 - Handle the I2c return values in a better way (dp_dual_mode)
 - Make the macros for SCDC Major/Minor more readable, by adding
   a 'GET' in the macro names
V6: Rebase
V7: Rebase
V8: Rebase
V9: Rebase
V10: Rebase

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Reviewed-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1489404244-16608-2-git-send-email-shashank.sharma@intel.com
This commit is contained in:
Thierry Reding
2017-03-13 16:53:59 +05:30
committed by Jani Nikula
parent 9aa1eca095
commit 3ad33ae2bc
4 changed files with 269 additions and 1 deletions
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12
Documentation/gpu/drm-kms-helpers.rst
View File

@@ -223,6 +223,18 @@ EDID Helper Functions Reference
.. kernel-doc:: drivers/gpu/drm/drm_edid.c
:export:
SCDC Helper Functions Reference
===============================
.. kernel-doc:: drivers/gpu/drm/drm_scdc_helper.c
:doc: scdc helpers
.. kernel-doc:: include/drm/drm_scdc_helper.h
:internal:
.. kernel-doc:: drivers/gpu/drm/drm_scdc_helper.c
:export:
Rectangle Utilities Reference
=============================