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drm/i915: Switch intel_usecs_to_scanlines() to 64bit maths

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Dotclocks can reach ~1GHz these days, so intel_usecs_to_scanlines(),
with its 32bit maths, is currently limited to a few milliseconds.
I want bigger numbers in DSB selftests, so switch over to 64bit
maths.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240528185647.7765-7-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Ville Syrjälä 2024-05-28 21:56:46 +03:00
parent 5b7f65acf1
commit d3e80f2dcf
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/display/intel_crtc.c
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@ -454,8 +454,8 @@ int intel_usecs_to_scanlines(const struct drm_display_mode *adjusted_mode,
if (!adjusted_mode->crtc_htotal)
return 1;
return DIV_ROUND_UP(usecs * adjusted_mode->crtc_clock,
1000 * adjusted_mode->crtc_htotal);
return DIV_ROUND_UP_ULL(mul_u32_u32(usecs, adjusted_mode->crtc_clock),
1000 * adjusted_mode->crtc_htotal);
}
/**