drm/atomic: Don't potentially reset color_mgmt_changed on successive property updates.

commit add1fa75101263ab4d74240f93000998d4325624 upstream.

Due to assigning the 'replaced' value instead of or'ing it,
if drm_atomic_crtc_set_property() gets called multiple times,
the last call will define the color_mgmt_changed flag, so
a non-updating call to a property can reset the flag and
prevent actual hw state updates required by preceding
property updates.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 9bb99e274d235be7b746747dc8c01b7dfe6f4be7..79a05a3bc50bdb3fb27637d37d8335dfab50f62d 100644 (file)
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -465,7 +465,7 @@ int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
                                        val,
                                        -1,
                                        &replaced);
-               state->color_mgmt_changed = replaced;
+               state->color_mgmt_changed |= replaced;
                return ret;
        } else if (property == config->ctm_property) {
                ret = drm_atomic_replace_property_blob_from_id(crtc,
@@ -473,7 +473,7 @@ int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
                                        val,
                                        sizeof(struct drm_color_ctm),
                                        &replaced);
-               state->color_mgmt_changed = replaced;
+               state->color_mgmt_changed |= replaced;
                return ret;
        } else if (property == config->gamma_lut_property) {
                ret = drm_atomic_replace_property_blob_from_id(crtc,
@@ -481,7 +481,7 @@ int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
                                        val,
                                        -1,
                                        &replaced);
-               state->color_mgmt_changed = replaced;
+               state->color_mgmt_changed |= replaced;
                return ret;
        } else if (crtc->funcs->atomic_set_property)
                return crtc->funcs->atomic_set_property(crtc, state, property, val);