diff options
| author | Jani Nikula | 2022-02-03 11:03:50 +0200 |
|---|---|---|
| committer | Jani Nikula | 2022-02-11 11:35:37 +0200 |
| commit | 0f4b58423f3500ee3e3159fbbd6c41a6e6f920d4 (patch) | |
| tree | 55cf6dfa74b7a1e856748b8ef3ea9ee9ce6ab958 /include/drm | |
| parent | f7bc440bc79ae5dcf648b90209910ea8dba6ef0c (diff) | |
drm/dp: add drm_dp_128b132b_read_aux_rd_interval()
The DP 2.0 errata changes DP_128B132B_TRAINING_AUX_RD_INTERVAL (DPCD
0x2216) completely. Add a new function to read that. Follow-up will need
to clean up existing functions.
v2: fix reversed interpretation of bit 7 meaning (Uma)
Cc: Uma Shankar <uma.shankar@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/22f6637194c9edb22b6a84be82dd385550dbb958.1643878928.git.jani.nikula@intel.com
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/drm_dp_helper.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 30359e434c3f..629ac2272e55 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -1115,6 +1115,7 @@ struct drm_panel; # define DP_UHBR13_5 (1 << 2) #define DP_128B132B_TRAINING_AUX_RD_INTERVAL 0x2216 /* 2.0 */ +# define DP_128B132B_TRAINING_AUX_RD_INTERVAL_1MS_UNIT (1 << 7) # define DP_128B132B_TRAINING_AUX_RD_INTERVAL_MASK 0x7f # define DP_128B132B_TRAINING_AUX_RD_INTERVAL_400_US 0x00 # define DP_128B132B_TRAINING_AUX_RD_INTERVAL_4_MS 0x01 @@ -1552,6 +1553,8 @@ void drm_dp_link_train_channel_eq_delay(const struct drm_dp_aux *aux, void drm_dp_lttpr_link_train_channel_eq_delay(const struct drm_dp_aux *aux, const u8 caps[DP_LTTPR_PHY_CAP_SIZE]); +int drm_dp_128b132b_read_aux_rd_interval(struct drm_dp_aux *aux); + u8 drm_dp_link_rate_to_bw_code(int link_rate); int drm_dp_bw_code_to_link_rate(u8 link_bw); |