From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> If someone is interested in the current cdclk frquency it should be stable and not in process of changing frquency. Warn if the current and requested cdclk don't match in .get_display_clock_spee() on vlv. Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/intel_display.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 29dddec..601e97e 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -5234,6 +5234,10 @@ static int valleyview_get_display_clock_speed(struct drm_device *dev) divider = val & DISPLAY_FREQUENCY_VALUES; + WARN((val & DISPLAY_FREQUENCY_STATUS) != + (divider << DISPLAY_FREQUENCY_STATUS_SHIFT), + "cdclk change in progress\n"); + return DIV_ROUND_CLOSEST(vco << 1, divider + 1); } -- 1.8.5.5 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
