We need to round up the values since the comparison in drm_mode_equal might fail if division results in fractional part
Signed-off-by: Furquan Shaikh furquan@google.com --- drivers/gpu/drm/i915/intel_display.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 0f40f8e..e0069f4 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7190,7 +7190,11 @@ static void ironlake_crtc_clock_get(struct intel_crtc *crtc, return;
clock = ((u64)link_m * (u64)link_freq * (u64)repeat); - do_div(clock, link_n); + /* This is required because the value comes out to be in fraction + (eg. 70699.54). Need to round it up since values are compared in + drm_mode_equal + */ + clock = DIV_ROUND_UP_ULL(clock, link_n);
pipe_config->adjusted_mode.clock = clock; }