drm/i915: Use helper to set CRTC state's mode

We need to call drm_atomic_set_mode_for_crtc() rather than copying the
mode in manually.  As of commit

        commit 99cf4a29fa24461bbfe22125967188a18383eb5c
        Author: Daniel Stone <daniels@collabora.com>
        Date:   Mon May 25 19:11:51 2015 +0100

            drm/atomic: Add current-mode blob to CRTC state

the helper now also takes care of setting up the mode property blob for
us; if we don't use the helper and never setup the mode blob, this will
also trigger a failure in drm_atomic_crtc_check() when we have the
DRIVER_ATOMIC flag set (i.e., when using the nuclear pageflip support
via i915.nuclear_pageflip kernel command line parameter).

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3f4891782cf6860b07efde7a0fcc680955f2d3a1..98bb15ac4c663e80beac51b5cc5437936f9e2c3b 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13264,8 +13264,9 @@ intel_modeset_stage_output_state(struct drm_device *dev,
        if (IS_ERR(crtc_state))
                return PTR_ERR(crtc_state);
 
-       if (set->mode)
-               drm_mode_copy(&crtc_state->mode, set->mode);
+       ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
+       if (ret)
+               return ret;
 
        if (set->num_connectors)
                crtc_state->active = true;