drm/displayid: convert to drm_edid

We'll need to propagate drm_edid everywhere.

v2: Rebase
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/a52a6882e87a4bb6b1670918f3aba13f9b52f6de.1652097712.git.jani.nikula@intel.com

drivers/gpu/drm/drm_displayid.c

@@ -33,11 +33,11 @@ static int validate_displayid(const u8 *displayid, int length, int idx)
 	return 0;
 }
 
-static const u8 *drm_find_displayid_extension(const struct edid *edid,
+static const u8 *drm_find_displayid_extension(const struct drm_edid *drm_edid,
 					      int *length, int *idx,
 					      int *ext_index)
 {
-	const u8 *displayid = drm_find_edid_extension(edid, DISPLAYID_EXT, ext_index);
+	const u8 *displayid = drm_find_edid_extension(drm_edid, DISPLAYID_EXT, ext_index);
 	const struct displayid_header *base;
 	int ret;
 
@@ -58,12 +58,12 @@ static const u8 *drm_find_displayid_extension(const struct edid *edid,
 	return displayid;
 }
 
-void displayid_iter_edid_begin(const struct edid *edid,
+void displayid_iter_edid_begin(const struct drm_edid *drm_edid,
 			       struct displayid_iter *iter)
 {
 	memset(iter, 0, sizeof(*iter));
 
-	iter->edid = edid;
+	iter->drm_edid = drm_edid;
 }
 
 static const struct displayid_block *
@@ -88,7 +88,7 @@ __displayid_iter_next(struct displayid_iter *iter)
 {
 	const struct displayid_block *block;
 
-	if (!iter->edid)
+	if (!iter->drm_edid)
 		return NULL;
 
 	if (iter->section) {
@@ -96,7 +96,7 @@ __displayid_iter_next(struct displayid_iter *iter)
 		block = displayid_iter_block(iter);
 		if (WARN_ON(!block)) {
 			iter->section = NULL;
-			iter->edid = NULL;
+			iter->drm_edid = NULL;
 			return NULL;
 		}
 
@@ -109,12 +109,12 @@ __displayid_iter_next(struct displayid_iter *iter)
 	}
 
 	for (;;) {
-		iter->section = drm_find_displayid_extension(iter->edid,
+		iter->section = drm_find_displayid_extension(iter->drm_edid,
 							     &iter->length,
 							     &iter->idx,
 							     &iter->ext_index);
 		if (!iter->section) {
-			iter->edid = NULL;
+			iter->drm_edid = NULL;
 			return NULL;
 		}
 

drivers/gpu/drm/drm_edid.c

@@ -3563,10 +3563,13 @@ static int add_detailed_modes(struct drm_connector *connector,
 
 /*
  * Search EDID for CEA extension block.
+ *
+ * FIXME: Prefer not returning pointers to raw EDID data.
  */
-const u8 *drm_find_edid_extension(const struct edid *edid,
+const u8 *drm_find_edid_extension(const struct drm_edid *drm_edid,
 				  int ext_id, int *ext_index)
 {
+	const struct edid *edid = drm_edid ? drm_edid->edid : NULL;
 	const u8 *edid_ext = NULL;
 	int i;
 
@@ -3598,11 +3601,11 @@ static bool drm_edid_has_cta_extension(const struct drm_edid *drm_edid)
 	bool found = false;
 
 	/* Look for a top level CEA extension block */
-	if (drm_find_edid_extension(drm_edid->edid, CEA_EXT, &ext_index))
+	if (drm_find_edid_extension(drm_edid, CEA_EXT, &ext_index))
 		return true;
 
 	/* CEA blocks can also be found embedded in a DisplayID block */
-	displayid_iter_edid_begin(drm_edid->edid, &iter);
+	displayid_iter_edid_begin(drm_edid, &iter);
 	displayid_iter_for_each(block, &iter) {
 		if (block->tag == DATA_BLOCK_CTA) {
 			found = true;
@@ -4454,7 +4457,7 @@ static void cea_db_iter_edid_begin(const struct drm_edid *drm_edid,
 	memset(iter, 0, sizeof(*iter));
 
 	drm_edid_iter_begin(drm_edid, &iter->edid_iter);
-	displayid_iter_edid_begin(drm_edid ? drm_edid->edid : NULL, &iter->displayid_iter);
+	displayid_iter_edid_begin(drm_edid, &iter->displayid_iter);
 }
 
 static const struct cea_db *
@@ -5657,7 +5660,7 @@ static void drm_update_mso(struct drm_connector *connector,
 	const struct displayid_block *block;
 	struct displayid_iter iter;
 
-	displayid_iter_edid_begin(drm_edid->edid, &iter);
+	displayid_iter_edid_begin(drm_edid, &iter);
 	displayid_iter_for_each(block, &iter) {
 		if (block->tag == DATA_BLOCK_2_VENDOR_SPECIFIC)
 			drm_parse_vesa_mso_data(connector, block);
@@ -5872,7 +5875,7 @@ static int add_displayid_detailed_modes(struct drm_connector *connector,
 	struct displayid_iter iter;
 	int num_modes = 0;
 
-	displayid_iter_edid_begin(drm_edid->edid, &iter);
+	displayid_iter_edid_begin(drm_edid, &iter);
 	displayid_iter_for_each(block, &iter) {
 		if (block->tag == DATA_BLOCK_TYPE_1_DETAILED_TIMING ||
 		    block->tag == DATA_BLOCK_2_TYPE_7_DETAILED_TIMING)
@@ -6372,7 +6375,7 @@ static void _drm_update_tile_info(struct drm_connector *connector,
 
 	connector->has_tile = false;
 
-	displayid_iter_edid_begin(drm_edid ? drm_edid->edid : NULL, &iter);
+	displayid_iter_edid_begin(drm_edid, &iter);
 	displayid_iter_for_each(block, &iter) {
 		if (block->tag == DATA_BLOCK_TILED_DISPLAY)
 			drm_parse_tiled_block(connector, block);

include/drm/drm_displayid.h

@@ -25,7 +25,7 @@
 #include <linux/types.h>
 #include <linux/bits.h>
 
-struct edid;
+struct drm_edid;
 
 #define VESA_IEEE_OUI				0x3a0292
 
@@ -141,7 +141,7 @@ struct displayid_vesa_vendor_specific_block {
 
 /* DisplayID iteration */
 struct displayid_iter {
-	const struct edid *edid;
+	const struct drm_edid *drm_edid;
 
 	const u8 *section;
 	int length;
@@ -149,7 +149,7 @@ struct displayid_iter {
 	int ext_index;
 };
 
-void displayid_iter_edid_begin(const struct edid *edid,
+void displayid_iter_edid_begin(const struct drm_edid *drm_edid,
 			       struct displayid_iter *iter);
 const struct displayid_block *
 __displayid_iter_next(struct displayid_iter *iter);

include/drm/drm_edid.h

@@ -28,6 +28,7 @@
 #include <drm/drm_mode.h>
 
 struct drm_device;
+struct drm_edid;
 struct i2c_adapter;
 
 #define EDID_LENGTH 128
@@ -578,8 +579,9 @@ struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
 struct drm_display_mode *
 drm_display_mode_from_cea_vic(struct drm_device *dev,
 			      u8 video_code);
-const u8 *drm_find_edid_extension(const struct edid *edid,
-				  int ext_id, int *ext_index);
 
+/* Interface based on struct drm_edid */
+const u8 *drm_find_edid_extension(const struct drm_edid *drm_edid,
+				  int ext_id, int *ext_index);
 
 #endif /* __DRM_EDID_H__ */