[Intel-gfx] [PATCH] drm/i915: add immutable zpos plane properties

[Simon Ser]

From: emersion <contact at emersion.fr>

This adds basic immutable support for the zpos property. The zpos increases
from bottom to top: primary, sprites, cursor.

Signed-off-by: Simon Ser <contact at emersion.fr>
---

This is based on a previous patch by Ville [1] that I wanted to review.
Unfortunately the patch no longer applies, so here is a new one.

[1]: https://patchwork.freedesktop.org/patch/225887/?series=43902&rev=1

 drivers/gpu/drm/i915/intel_display.c | 10 ++++++++--
 drivers/gpu/drm/i915/intel_sprite.c  |  5 ++++-
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 8576a7f799..f0a85a75bd 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -14323,7 +14323,7 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 	const u64 *modifiers;
 	const u32 *formats;
 	int num_formats;
-	int ret;
+	int ret, zpos;
 
 	if (INTEL_GEN(dev_priv) >= 9)
 		return skl_universal_plane_create(dev_priv, pipe,
@@ -14412,6 +14412,9 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 						   DRM_MODE_ROTATE_0,
 						   supported_rotations);
 
+	zpos = 0;
+	drm_plane_create_zpos_immutable_property(&plane->base, zpos);
+
 	drm_plane_helper_add(&plane->base, &intel_plane_helper_funcs);
 
 	return plane;
@@ -14428,7 +14431,7 @@ intel_cursor_plane_create(struct drm_i915_private *dev_priv,
 {
 	unsigned int possible_crtcs;
 	struct intel_plane *cursor;
-	int ret;
+	int ret, zpos;
 
 	cursor = intel_plane_alloc();
 	if (IS_ERR(cursor))
@@ -14477,6 +14480,9 @@ intel_cursor_plane_create(struct drm_i915_private *dev_priv,
 						   DRM_MODE_ROTATE_0 |
 						   DRM_MODE_ROTATE_180);
 
+	zpos = RUNTIME_INFO(dev_priv)->num_sprites[pipe] + 1;
+	drm_plane_create_zpos_immutable_property(&cursor->base, zpos);
+
 	drm_plane_helper_add(&cursor->base, &intel_plane_helper_funcs);
 
 	return cursor;
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 65de7387bf..48bd8f9079 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -2354,7 +2354,7 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
 	const u64 *modifiers;
 	const u32 *formats;
 	int num_formats;
-	int ret;
+	int ret, zpos;
 
 	if (INTEL_GEN(dev_priv) >= 9)
 		return skl_universal_plane_create(dev_priv, pipe,
@@ -2444,6 +2444,9 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
 					  DRM_COLOR_YCBCR_BT709,
 					  DRM_COLOR_YCBCR_LIMITED_RANGE);
 
+	zpos = sprite + 1;
+	drm_plane_create_zpos_immutable_property(&plane->base, zpos);
+
 	drm_plane_helper_add(&plane->base, &intel_plane_helper_funcs);
 
 	return plane;
-- 
2.21.0