diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2025-07-18 15:01:52 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2025-09-19 23:24:37 +0300 |
| commit | 3a9cf301794c1a49d95eeb13119ff490fb5cfe88 (patch) | |
| tree | fa1e5fd5f349013aae7f5c0cd26ceb68197c2d5f /drivers/gpu/drm/display | |
| parent | 2b8e4b94c1b6cea1b4d3f989b3dfe4301d0d3a4a (diff) | |
drm/dp: Add POST_LT_ADJ_REQ helpers
Add small helpers (drm_dp_post_lt_adj_req_supported() and
drm_dp_post_lt_adj_req_in_progress()) to help with implementing
the POST_LT_ADJ_REQ sequence.
Tested-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250718120154.15492-3-ville.syrjala@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/display')
| -rw-r--r-- | drivers/gpu/drm/display/drm_dp_helper.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index 4aaeae4fa03c..5426db21e53f 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -123,6 +123,14 @@ bool drm_dp_clock_recovery_ok(const u8 link_status[DP_LINK_STATUS_SIZE], } EXPORT_SYMBOL(drm_dp_clock_recovery_ok); +bool drm_dp_post_lt_adj_req_in_progress(const u8 link_status[DP_LINK_STATUS_SIZE]) +{ + u8 lane_align = dp_link_status(link_status, DP_LANE_ALIGN_STATUS_UPDATED); + + return lane_align & DP_POST_LT_ADJ_REQ_IN_PROGRESS; +} +EXPORT_SYMBOL(drm_dp_post_lt_adj_req_in_progress); + u8 drm_dp_get_adjust_request_voltage(const u8 link_status[DP_LINK_STATUS_SIZE], int lane) { |