drm/edid: add new interfaces around struct drm_edid

Add new functions drm_edid_read(), drm_edid_read_ddc(), and
drm_edid_read_custom() to replace drm_get_edid() and drm_do_get_edid()
for reading the EDID. The transition is expected to happen over a fairly
long time.

Note that the new drm_edid_read*() functions do not do any of the
connector updates anymore. The reading and parsing will be completely
separated from each other.

Add new functions drm_edid_alloc(), drm_edid_dup(), and drm_edid_free()
for allocating and freeing drm_edid containers.

Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/5a6532a94cad6a79424f6d1918dbe7b7d607ac03.1654674560.git.jani.nikula@intel.com

1 files changed, 9 insertions, 0 deletions

diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 1d5950b5b407..c592d2c1afed 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -594,6 +594,15 @@ drm_display_mode_from_cea_vic(struct drm_device *dev,
 			      u8 video_code);
 
 /* Interface based on struct drm_edid */
+const struct drm_edid *drm_edid_alloc(const void *edid, size_t size);
+const struct drm_edid *drm_edid_dup(const struct drm_edid *drm_edid);
+void drm_edid_free(const struct drm_edid *drm_edid);
+const struct drm_edid *drm_edid_read(struct drm_connector *connector);
+const struct drm_edid *drm_edid_read_ddc(struct drm_connector *connector,
+					 struct i2c_adapter *adapter);
+const struct drm_edid *drm_edid_read_custom(struct drm_connector *connector,
+					    int (*read_block)(void *context, u8 *buf, unsigned int block, size_t len),
+					    void *context);
 const u8 *drm_find_edid_extension(const struct drm_edid *drm_edid,
 				  int ext_id, int *ext_index);