[PATCH v2 4/4] drm/i915/display: Error codes for async flip failures

[Arun R Murthy]

For failures in async flip atomic check/commit path return user readable
error codes in struct drm_atomic_state.

Signed-off-by: Arun R Murthy <arun.r.mur...@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c 
b/drivers/gpu/drm/i915/display/intel_display.c
index 
7035c1fc9033b10327be081f26715446687652c4..893e4d0eb4c3d4d2611720bc7f627b11af81ea8b
 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -5944,6 +5944,7 @@ static int intel_async_flip_check_uapi(struct 
intel_atomic_state *state,
                drm_dbg_kms(display->drm,
                            "[CRTC:%d:%s] modeset required\n",
                            crtc->base.base.id, crtc->base.name);
+               state->base.error_code = DRM_MODE_ATOMIC_CRTC_NEED_FULL_MODESET;
                return -EINVAL;
        }
 
@@ -5955,6 +5956,7 @@ static int intel_async_flip_check_uapi(struct 
intel_atomic_state *state,
                drm_dbg_kms(display->drm,
                            "[CRTC:%d:%s] async flip disallowed with joiner\n",
                            crtc->base.base.id, crtc->base.name);
+               state->base.error_code = 
DRM_MODE_ATOMIC_ASYNC_PIPEJOINER_NOTALLOWED;
                return -EINVAL;
        }
 
@@ -6013,6 +6015,7 @@ static int intel_async_flip_check_hw(struct 
intel_atomic_state *state, struct in
                drm_dbg_kms(display->drm,
                            "[CRTC:%d:%s] modeset required\n",
                            crtc->base.base.id, crtc->base.name);
+               state->base.error_code = DRM_MODE_ATOMIC_CRTC_NEED_FULL_MODESET;
                return -EINVAL;
        }
 
@@ -6055,6 +6058,7 @@ static int intel_async_flip_check_hw(struct 
intel_atomic_state *state, struct in
                                    plane->base.base.id, plane->base.name,
                                    &new_plane_state->hw.fb->format->format,
                                    new_plane_state->hw.fb->modifier);
+                       state->base.error_code = 
DRM_MODE_ATOMIC_ASYNC_MODIFIER_NOT_SUPPORTED;
                        return -EINVAL;
                }
 

-- 
2.25.1