intel_mode_from_pipe_config() fills in a mode structure from the CRTC
state that was read out of the hardware, but does not set the
.crtc_clock field (it only sets the .clock).  This causes the subsequent
call to drm_calc_timestamping_constants() to complain with messages like
"*ERROR* crtc 21: Can't calculate constants, dotclock = 0!"  Ensuring
.crtc_clock is set as well eliminates this error.

Signed-off-by: Matt Roper <[email protected]>
---
 drivers/gpu/drm/i915/intel_display.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c 
b/drivers/gpu/drm/i915/intel_display.c
index bbeb6d3..4e481e3 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7752,6 +7752,7 @@ void intel_mode_from_pipe_config(struct drm_display_mode 
*mode,
        mode->type = DRM_MODE_TYPE_DRIVER;
 
        mode->clock = pipe_config->base.adjusted_mode.crtc_clock;
+       mode->crtc_clock = pipe_config->base.adjusted_mode.crtc_clock;
        mode->flags |= pipe_config->base.adjusted_mode.flags;
 
        mode->hsync = drm_mode_hsync(mode);
-- 
2.1.4

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