diff options
| author |   Anusha Srivatsa <anusha.srivatsa@intel.com> | 2018-11-01 21:14:55 -0700 |
|---|---|---|
| committer |   Manasi Navare <manasi.d.navare@intel.com> | 2018-11-02 18:22:25 -0700 |
| commit | 857d828374cc84d07c7b94db2cf535aa517444dd (patch) | |
| tree | 4debc299b4a1834adbf4cd9aff134812f77ced05 /include/drm | |
| parent | i915/dp/fec: Cache the FEC_CAPABLE DPCD register (diff) | |
| download | linux-dev-857d828374cc84d07c7b94db2cf535aa517444dd.tar.xz linux-dev-857d828374cc84d07c7b94db2cf535aa517444dd.zip | |
drm/dp/fec: DRM helper for Forward Error Correction
DP 1.4 has Forward Error Correction Support(FEC).
Add helper function to check if the sink device
supports FEC.
v2: Separate the helper and the code that uses the helper into
two separate patches. (Manasi)
v3:
- Move the code to drm_dp_helper.c (Manasi)
- change the return type, code style changes (Gaurav)
- Use drm_dp_dpcd_readb instead of drm_dp_dpcd_read. (Jani)
v4:
- Avoid aux reads everytime, instead read cached
values of dpcd register (jani)
- Move helper to drm_dp_helper.h like other dsc
helpers.(Anusha)
v5: rebased. Change the helper parameter suitably.
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Acked-by: Sean Paul <seanpaul@chromium.org> (For merging through
drm-intel)
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181102041455.15818-2-anusha.srivatsa@intel.com
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/drm_dp_helper.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index f82e68db16e0..3e781dfb6fc1 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -1147,6 +1147,13 @@ drm_dp_dsc_sink_max_slice_width(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE]) DP_DSC_SLICE_WIDTH_MULTIPLIER; } +/* Forward Error Correction Support on DP 1.4 */ +static inline bool +drm_dp_sink_supports_fec(const u8 fec_capable) +{ + return fec_capable & DP_FEC_CAPABLE; +} + /* * DisplayPort AUX channel */ |