Claude review: drm/i915/display: Add helper for AS SDP transmission time selection

Claude Code Review Bot
2026-04-12T02:51:29Z

Patch Review

**R-b: Ville Syrjala**

Adds `intel_dp_as_sdp_transmission_time()` which currently returns `DP_PR_AS_SDP_SETUP_TIME_T1` unconditionally, and `get_pr_alpm_as_sdp_transmission_time()` which maps this to the HW register field.

The `intel_dp_as_sdp_transmission_time()` function takes no parameters and always returns T1. The code is structured for future expansion but currently trivial. The `crtc_state` parameter in `get_pr_alpm_as_sdp_transmission_time()` is unused -- it's presumably kept for future use.

No functional issues.