Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/i915: Switch intel_usecs_to_scanlines() to 64bit maths
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>
+2
-2
+2
-2
drivers/gpu/drm/i915/display/intel_crtc.c
+2
-2
drivers/gpu/drm/i915/display/intel_crtc.c
···
454
454
if (!adjusted_mode->crtc_htotal)
455
455
return 1;
456
456
457
-
return DIV_ROUND_UP(usecs * adjusted_mode->crtc_clock,
458
-
1000 * adjusted_mode->crtc_htotal);
457
+
return DIV_ROUND_UP_ULL(mul_u32_u32(usecs, adjusted_mode->crtc_clock),
458
+
1000 * adjusted_mode->crtc_htotal);
459
459
}
460
460
461
461
/**