From d3e80f2dcf8c2aae09eca6b394eb253505e37dda Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Tue, 28 May 2024 21:56:46 +0300 Subject: [PATCH] drm/i915: Switch intel_usecs_to_scanlines() to 64bit maths MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Link: https://patchwork.freedesktop.org/patch/msgid/20240528185647.7765-7-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula --- drivers/gpu/drm/i915/display/intel_crtc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c b/drivers/gpu/drm/i915/display/intel_crtc.c index bf6e74e99f5c5..54b529bfc9352 100644 --- a/drivers/gpu/drm/i915/display/intel_crtc.c +++ b/drivers/gpu/drm/i915/display/intel_crtc.c @@ -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); } /** -- 2.47.2