drm/i915: Add a table with a descriptor for all i915 modifiers

Add a table describing all the framebuffer modifiers used by i915 at one
place. This has the benefit of deduplicating the listing of supported
modifiers for each platform and checking the support of these modifiers
on a given plane. This also simplifies in a similar way getting some
attribute for a modifier, for instance checking if the modifier is a
CCS modifier type.

While at it drop the cursor plane filtering from skl_plane_has_rc_ccs(),
as the cursor plane is registered with DRM core elsewhere.

v1: Unchanged.
v2:
- Keep the plane caps calculation in the plane code and pass an enum
  with these caps to intel_fb_get_modifiers(). (Ville)
- Get the modifiers calling intel_fb_get_modifiers() in i9xx_plane.c as
  well.
v3:
- s/.id/.modifier/ (Ville)
- Keep modifier_desc vs. plane_cap filter conditions consistent. (Ville)
- Drop redundant cursor plane check from skl_plane_has_rc_ccs(). (Ville)
- Use from, until display version fields in modifier_desc instead of a mask. (Jani)
- Unexport struct intel_modifier_desc, separate its decl and init. (Jani)
- Remove enum pipe, plane_id forward decls from intel_fb.h, which are
  not needed after v2.
v4:
- Reuse IS_DISPLAY_VER() instead of open-coding it. (Jani)
- Preserve the current modifier order exposed to user space. (Ville)
v5: Use }, { on one line to seperate the descriptor array elements. (Jani)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com> (v3)
Link: https://patchwork.freedesktop.org/patch/msgid/20211020195138.1841242-2-imre.deak@intel.com

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_fb.h b/drivers/gpu/drm/i915/display/intel_fb.h
index 1cbdd84502bd..0f77e81e69d2 100644
--- a/drivers/gpu/drm/i915/display/intel_fb.h
+++ b/drivers/gpu/drm/i915/display/intel_fb.h
@@ -6,6 +6,7 @@
 #ifndef __INTEL_FB_H__
 #define __INTEL_FB_H__
 
+#include <linux/bits.h>
 #include <linux/types.h>
 
 struct drm_device;
@@ -16,13 +17,25 @@ struct drm_i915_private;
 struct drm_mode_fb_cmd2;
 struct intel_fb_view;
 struct intel_framebuffer;
+struct intel_plane;
 struct intel_plane_state;
 
+enum intel_plane_caps {
+	PLANE_HAS_NO_CAPS = 0,
+	PLANE_HAS_TILING = BIT(0),
+	PLANE_HAS_CCS_RC = BIT(1),
+	PLANE_HAS_CCS_MC = BIT(2),
+};
+
 bool is_ccs_plane(const struct drm_framebuffer *fb, int plane);
 bool is_gen12_ccs_plane(const struct drm_framebuffer *fb, int plane);
 bool is_gen12_ccs_cc_plane(const struct drm_framebuffer *fb, int plane);
 bool is_semiplanar_uv_plane(const struct drm_framebuffer *fb, int color_plane);
 
+u64 *intel_fb_plane_get_modifiers(struct drm_i915_private *i915,
+				  enum intel_plane_caps plane_caps);
+bool intel_fb_plane_supports_modifier(struct intel_plane *plane, u64 modifier);
+
 bool is_surface_linear(const struct drm_framebuffer *fb, int color_plane);
 
 int main_to_ccs_plane(const struct drm_framebuffer *fb, int main_plane);