[v2 05/25] drm: Add Color ops capability property

[Uma Shankar]

Add capability property which a colorop can expose it's
hardware's abilities. It's a blob property that can be
filled with respective data structures depending on the
colorop. The user space is expected to read this property
and program the colorop accordingly.

Signed-off-by: Uma Shankar <uma.shan...@intel.com>
Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.bo...@intel.com>
---
 drivers/gpu/drm/drm_atomic_uapi.c |  3 +++
 include/drm/drm_colorop.h         | 12 ++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_uapi.c 
b/drivers/gpu/drm/drm_atomic_uapi.c
index ba68358c0ffe..46cc7b0df6e8 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -780,6 +780,9 @@ drm_atomic_colorop_get_property(struct drm_colorop *colorop,
                *val = state->size;
        } else if (property == colorop->data_property) {
                *val = (state->data) ? state->data->base.id : 0;
+       } else if (property == colorop->hw_caps_property) {
+               *val = state->hw_caps ?
+                       state->hw_caps->base.id : 0;
        } else {
                return -EINVAL;
        }
diff --git a/include/drm/drm_colorop.h b/include/drm/drm_colorop.h
index 56b51fafebdf..58e5b87c6d56 100644
--- a/include/drm/drm_colorop.h
+++ b/include/drm/drm_colorop.h
@@ -146,6 +146,11 @@ struct drm_colorop_state {
         * Number of entries of the custom LUT. This should be read-only.
         */
        uint32_t size;
+       /**
+        * @hw_caps:
+        *
+        */
+       struct drm_property_blob *hw_caps;
 
        /**
         * @lut_3d_modes:
@@ -297,6 +302,13 @@ struct drm_colorop {
         */
        struct drm_property *curve_1d_type_property;
 
+       /**
+        * @hwlut_caps_property:
+        *
+        * Property to expose hardware lut capbilities.
+        */
+       struct drm_property *hw_caps_property;
+
        /**
         * @multiplier_property:
         *
-- 
2.42.0