drm/i915/cx0_phy: Fix ARL-S host bridge detection

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Fix is_arrowlake_s_by_host_bridge() which always returned false.
The while loop always exits with pdev as NULL, so the return
condition was always false, causing the wrong tx_misc value to be used.

Check the host bridge ID inside the loop body.  Once found early exit
from the loop release the pci reference "pdev" and return true.

v2:
 - Update commit message (Chaitanya)

Bspec:74165,74491
Suggested-by: Jani Nikula <jani.nikula@intel.com>
Cc: <stable@vger.kernel.org>
Fixes: 3630a47b70 ("drm/i915/cx0_phy: Update HDMI TMDS C20 algorithm value")
Signed-off-by: Dnyaneshwar Bhadane <dnyaneshwar.bhadane@intel.com>
Reviewed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Link: https://patch.msgid.link/20260921090226.946472-1-dnyaneshwar.bhadane@intel.com
(cherry picked from commit 0507cc5a476af0b6d037b19248bdd20dbe27487d)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

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Dnyaneshwar Bhadane 2026-09-21 14:32:26 +05:30 • committed by Joonas Lahtinen

parent 7dedc5bb11

commit 6a8bf59de3

1 changed files with 7 additions and 5 deletions

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drivers/gpu/drm/i915/display/intel_cx0_phy.c

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