riscv:driver:drm: Weston-GPU

add format_mod_supported interface for userspace

Signed-off-by: keith <keith.zhao@starfivetech.com>

diff --git a/drivers/gpu/drm/verisilicon/vs_plane.c b/drivers/gpu/drm/verisilicon/vs_plane.c
old mode 100644 (file)
new mode 100755 (executable)
index 0062f90..8cf5f3b
--- a/drivers/gpu/drm/verisilicon/vs_plane.c
+++ b/drivers/gpu/drm/verisilicon/vs_plane.c
@@ -193,6 +193,33 @@ static int vs_plane_atomic_get_property(struct drm_plane *plane,
        return 0;
 }
 
+static bool vs_format_mod_supported(struct drm_plane *plane,
+                                       uint32_t format,
+                                       uint64_t modifier)
+{
+   int i;
+
+   /*
+       * We always have to allow these modifiers:
+       * 1. Core DRM checks for LINEAR support if userspace does not provide modifiers.
+       * 2. Not passing any modifiers is the same as explicitly passing INVALID.
+       */
+   if (modifier == DRM_FORMAT_MOD_LINEAR) {
+          return true;
+   }
+
+   /* Check that the modifier is on the list of the plane's supported modifiers. */
+   for (i = 0; i < plane->modifier_count; i++) {
+          if (modifier == plane->modifiers[i])
+                  break;
+   }
+   if (i == plane->modifier_count)
+          return false;
+
+   return true;
+}
+
+
 const struct drm_plane_funcs vs_plane_funcs = {
        .update_plane           = drm_atomic_helper_update_plane,
        .disable_plane          = drm_atomic_helper_disable_plane,
@@ -202,6 +229,7 @@ const struct drm_plane_funcs vs_plane_funcs = {
        .atomic_destroy_state   = vs_plane_atomic_destroy_state,
        .atomic_set_property    = vs_plane_atomic_set_property,
        .atomic_get_property    = vs_plane_atomic_get_property,
+       .format_mod_supported   = vs_format_mod_supported,
 };
 
 static unsigned char vs_get_plane_number(struct drm_framebuffer *fb)