drm/i915/lt_phy: program DDI_CLK_VALFREQ with DDI clock frequency

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DDI_CLK_VALFREQ is programmed with the port clock, which for DP is the
symbol clock computed assuming 8b/10b encoding (link_rate / 10). For
DP 128b/132b (UHBR) rates and for HDMI FRL the port clock needs to
be modified.
DDI_CLK_VALFREQ does not have any functional impact on H/w, it
only records the frequency S/w intends to set.
Use intel_ddi_link_symbol_clock() to write the correct DDI clock in
kHz

Fixes: 5ec58d7149 ("drm/i915/lt_phy: Add .enable_clock hook on DDI")
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patch.msgid.link/20260811175844.2613721-4-suraj.kandpal@intel.com

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Suraj Kandpal 2026-08-11 23:28:44 +05:30

parent 9ac3ee6c0f

commit eaed815ca3

1 changed files with 4 additions and 2 deletions

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

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