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authorBen Widawsky <ben@bwidawsk.net>2017-07-24 06:46:39 +0300
committerDaniel Stone <daniels@collabora.com>2017-08-01 19:50:06 +0300
commitdb1689aa61bd1efb5ce9b896e7aa860a85b7f1b6 (patch)
tree0f9f810ae07e0eeed4f483ab5c5200265c748931 /drivers/gpu/drm/drm_plane.c
parente6fc3b68558e4c6d8d160b5daf2511b99afa8814 (diff)
downloadlinux-db1689aa61bd1efb5ce9b896e7aa860a85b7f1b6.tar.xz
drm: Create a format/modifier blob
Updated blob layout (Rob, Daniel, Kristian, xerpi) v2: * Removed __packed, and alignment (.+) * Fix indent in drm_format_modifier fields (Liviu) * Remove duplicated modifier > 64 check (Liviu) * Change comment about modifier (Liviu) * Remove arguments to blob creation, use plane instead (Liviu) * Fix data types (Ben) * Make the blob part of uapi (Daniel) v3: Remove unused ret field. Change i, and j to unsigned int (Emil) v4: Use plane->modifier_count instead of recounting (Daniel) v5: Rename modifiers to modifiers_property (Ville) Use sizeof(__u32) instead to reflect UAPI nature (Ville) Make BUILD_BUG_ON for blob header size Cc: Rob Clark <robdclark@gmail.com> Cc: Kristian H. Kristensen <hoegsberg@gmail.com> Signed-off-by: Ben Widawsky <ben@bwidawsk.net> Reviewed-by: Daniel Stone <daniels@collabora.com> (v2) Reviewed-by: Liviu Dudau <liviu@dudau.co.uk> (v2) Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> (v3) Signed-off-by: Daniel Stone <daniels@collabora.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170724034641.13369-2-ben@bwidawsk.net
Diffstat (limited to 'drivers/gpu/drm/drm_plane.c')
-rw-r--r--drivers/gpu/drm/drm_plane.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index d3fc561d7b48..5c14beee52ff 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -62,6 +62,87 @@ static unsigned int drm_num_planes(struct drm_device *dev)
return num;
}
+static inline u32 *
+formats_ptr(struct drm_format_modifier_blob *blob)
+{
+ return (u32 *)(((char *)blob) + blob->formats_offset);
+}
+
+static inline struct drm_format_modifier *
+modifiers_ptr(struct drm_format_modifier_blob *blob)
+{
+ return (struct drm_format_modifier *)(((char *)blob) + blob->modifiers_offset);
+}
+
+static int create_in_format_blob(struct drm_device *dev, struct drm_plane *plane)
+{
+ const struct drm_mode_config *config = &dev->mode_config;
+ struct drm_property_blob *blob;
+ struct drm_format_modifier *mod;
+ size_t blob_size, formats_size, modifiers_size;
+ struct drm_format_modifier_blob *blob_data;
+ unsigned int i, j;
+
+ formats_size = sizeof(__u32) * plane->format_count;
+ if (WARN_ON(!formats_size)) {
+ /* 0 formats are never expected */
+ return 0;
+ }
+
+ modifiers_size =
+ sizeof(struct drm_format_modifier) * plane->modifier_count;
+
+ blob_size = sizeof(struct drm_format_modifier_blob);
+ /* Modifiers offset is a pointer to a struct with a 64 bit field so it
+ * should be naturally aligned to 8B.
+ */
+ BUILD_BUG_ON(sizeof(struct drm_format_modifier_blob) % 8);
+ blob_size += ALIGN(formats_size, 8);
+ blob_size += modifiers_size;
+
+ blob = drm_property_create_blob(dev, blob_size, NULL);
+ if (IS_ERR(blob))
+ return -1;
+
+ blob_data = (struct drm_format_modifier_blob *)blob->data;
+ blob_data->version = FORMAT_BLOB_CURRENT;
+ blob_data->count_formats = plane->format_count;
+ blob_data->formats_offset = sizeof(struct drm_format_modifier_blob);
+ blob_data->count_modifiers = plane->modifier_count;
+
+ blob_data->modifiers_offset =
+ ALIGN(blob_data->formats_offset + formats_size, 8);
+
+ memcpy(formats_ptr(blob_data), plane->format_types, formats_size);
+
+ /* If we can't determine support, just bail */
+ if (!plane->funcs->format_mod_supported)
+ goto done;
+
+ mod = modifiers_ptr(blob_data);
+ for (i = 0; i < plane->modifier_count; i++) {
+ for (j = 0; j < plane->format_count; j++) {
+ if (plane->funcs->format_mod_supported(plane,
+ plane->format_types[j],
+ plane->modifiers[i])) {
+
+ mod->formats |= 1 << j;
+ }
+ }
+
+ mod->modifier = plane->modifiers[i];
+ mod->offset = 0;
+ mod->pad = 0;
+ mod++;
+ }
+
+done:
+ drm_object_attach_property(&plane->base, config->modifiers_property,
+ blob->base.id);
+
+ return 0;
+}
+
/**
* drm_universal_plane_init - Initialize a new universal plane object
* @dev: DRM device
@@ -181,6 +262,9 @@ int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
drm_object_attach_property(&plane->base, config->prop_src_h, 0);
}
+ if (config->allow_fb_modifiers)
+ create_in_format_blob(dev, plane);
+
return 0;
}
EXPORT_SYMBOL(drm_universal_plane_init);