drm/i915: Do not advertize support for NV12 on ICL yet.

ICL requires two planes for scanning out a NV12 framebuffer. Do
not advertize support for creating NV12 framebuffers until required
plane programming is implemented.

v2: Do not allow adding buffers.
    Check inside skl_plane_has_planar (Ville)

Bspec: Plane Planar YUV programming (18566)
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180824203856.17700-2-dhinakaran.pandiyan@intel.com

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bbd4d46..ec3e24f 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13619,6 +13619,13 @@ static bool skl_plane_has_fbc(struct drm_i915_private *dev_priv,
 bool skl_plane_has_planar(struct drm_i915_private *dev_priv,
                          enum pipe pipe, enum plane_id plane_id)
 {
+       /*
+        * FIXME: ICL requires two hardware planes for scanning out NV12
+        * framebuffers. Do not advertize support until this is implemented.
+        */
+       if (INTEL_GEN(dev_priv) >= 11)
+               return false;
+
        if (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))
                return false;
 
@@ -14540,7 +14547,7 @@ static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
                break;
        case DRM_FORMAT_NV12:
                if (INTEL_GEN(dev_priv) < 9 || IS_SKYLAKE(dev_priv) ||
-                   IS_BROXTON(dev_priv)) {
+                   IS_BROXTON(dev_priv) || INTEL_GEN(dev_priv) >= 11) {
                        DRM_DEBUG_KMS("unsupported pixel format: %s\n",
                                      drm_get_format_name(mode_cmd->pixel_format,
                                                          &format_name));