drm/i915/dp: Introduce helper to check pixel rate against dotclock limits

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Add intel_dp_dotclk_valid() helper, that checks the required pixel rate
against platform dotclock limit. With joined pipes the effective dotclock
limit depends upon the number of joined pipes.

Call the helper from the mode_valid phase and from the compute_config
phase where we need to check the limits for the given target clock for a
given joiner candidate.

v2: Rename the helper to intel_dp_dotclk_valid(). (Imre)

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20260202103731.357416-13-ankit.k.nautiyal@intel.com

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Ankit Nautiyal 2026-02-02 16:07:26 +05:30

parent 87860a1ccc

commit 7a687f705e

3 changed files with 35 additions and 18 deletions

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31

drivers/gpu/drm/i915/display/intel_dp.c

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3

drivers/gpu/drm/i915/display/intel_dp.h

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19

drivers/gpu/drm/i915/display/intel_dp_mst.c

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