drm/edid: add typedef for block read function

Make the callback a bit easier on the eye.
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/10b8721bb7ea8c7df1fd0c1d97c5d446905abbf4.1649685475.git.jani.nikula@intel.com

drivers/gpu/drm/drm_edid.c

@@ -2037,10 +2037,11 @@ int drm_add_override_edid_modes(struct drm_connector *connector)
 }
 EXPORT_SYMBOL(drm_add_override_edid_modes);
 
+typedef int read_block_fn(void *context, u8 *buf, unsigned int block, size_t len);
+
 static struct edid *drm_do_get_edid_base_block(struct drm_connector *connector,
-	int (*get_edid_block)(void *data, u8 *buf, unsigned int block,
-			      size_t len),
-	void *data)
+					       read_block_fn read_block,
+					       void *context)
 {
 	int *null_edid_counter = connector ? &connector->null_edid_counter : NULL;
 	bool *edid_corrupt = connector ? &connector->edid_corrupt : NULL;
@@ -2053,7 +2054,7 @@ static struct edid *drm_do_get_edid_base_block(struct drm_connector *connector,
 
 	/* base block fetch */
 	for (try = 0; try < 4; try++) {
-		if (get_edid_block(data, edid, 0, EDID_LENGTH))
+		if (read_block(context, edid, 0, EDID_LENGTH))
 			goto out;
 		if (drm_edid_block_valid(edid, 0, false, edid_corrupt))
 			break;
@@ -2097,9 +2098,8 @@ static struct edid *drm_do_get_edid_base_block(struct drm_connector *connector,
  * Return: Pointer to valid EDID or NULL if we couldn't find any.
  */
 struct edid *drm_do_get_edid(struct drm_connector *connector,
-	int (*get_edid_block)(void *data, u8 *buf, unsigned int block,
-			      size_t len),
-	void *data)
+			     read_block_fn read_block,
+			     void *context)
 {
 	int j, invalid_blocks = 0;
 	struct edid *edid, *new, *override;
@@ -2108,7 +2108,7 @@ struct edid *drm_do_get_edid(struct drm_connector *connector,
 	if (override)
 		return override;
 
-	edid = drm_do_get_edid_base_block(connector, get_edid_block, data);
+	edid = drm_do_get_edid_base_block(connector, read_block, context);
 	if (!edid)
 		return NULL;
 
@@ -2125,7 +2125,7 @@ struct edid *drm_do_get_edid(struct drm_connector *connector,
 		int try;
 
 		for (try = 0; try < 4; try++) {
-			if (get_edid_block(data, block, j, EDID_LENGTH))
+			if (read_block(context, block, j, EDID_LENGTH))
 				goto out;
 			if (drm_edid_block_valid(block, j, false, NULL))
 				break;