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drm/i915/display: Extend the max dotclock limit to WCL

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Add upper limit check for pixel clock for WCL.

For prior platforms though the bspec mentions the dotclock limits, however
these are intentionally not enforced to avoid regressions, unless real
issues are observed.

BSpec: 49199, 68912
Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20260202103731.357416-18-ankit.k.nautiyal@intel.com
This commit is contained in:
Chaitanya Kumar Borah 2026-02-02 16:07:31 +05:30 committed by Ankit Nautiyal
parent 50f5168775
commit e675b24827
1 changed files with 9 additions and 1 deletions
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10
drivers/gpu/drm/i915/display/intel_display.c
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@ -8031,8 +8031,16 @@ int intel_max_uncompressed_dotclock(struct intel_display *display)
int max_dotclock = display->cdclk.max_dotclk_freq;
int limit = max_dotclock;
if (DISPLAY_VER(display) >= 30)
if (DISPLAY_VERx100(display) == 3002)
limit = 937500;
else if (DISPLAY_VER(display) >= 30)
limit = 1350000;
/*
* Note: For other platforms though there are limits given
* in the Bspec, however the limit is intentionally not
* enforced to avoid regressions, unless real issues are
* observed.
*/
return min(max_dotclock, limit);
}