drm/edid: use the new displayid iterator for tile info

Neatly reduce displayid boilerplate in code. Remove excessive debug
logging while at it, no other functional changes.

The old displayid iterator becomes unused; remove it as well as make
drm_find_displayid_extension() static.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/fa4b5c790b5bdd82063545a6f209f8e9d78a63a7.1617024940.git.jani.nikula@intel.com

3 files changed, 10 insertions, 45 deletions

diff --git a/drivers/gpu/drm/drm_displayid.c b/drivers/gpu/drm/drm_displayid.c
index 5b809bb9fecc..902ff6114b68 100644
--- a/drivers/gpu/drm/drm_displayid.c
+++ b/drivers/gpu/drm/drm_displayid.c
@@ -33,9 +33,9 @@ static int validate_displayid(const u8 *displayid, int length, int idx)
 	return 0;
 }
 
-const u8 *drm_find_displayid_extension(const struct edid *edid,
-				       int *length, int *idx,
-				       int *ext_index)
+static const u8 *drm_find_displayid_extension(const struct edid *edid,
+					      int *length, int *idx,
+					      int *ext_index)
 {
 	const u8 *displayid = drm_find_edid_extension(edid, DISPLAYID_EXT, ext_index);
 	const struct displayid_hdr *base;
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 4526e2557dca..81d5f2524246 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -5969,43 +5969,20 @@ static void drm_parse_tiled_block(struct drm_connector *connector,
 	}
 }
 
-static void drm_displayid_parse_tiled(struct drm_connector *connector,
-				      const u8 *displayid, int length, int idx)
-{
-	const struct displayid_block *block;
-
-	idx += sizeof(struct displayid_hdr);
-	for_each_displayid_db(displayid, block, idx, length) {
-		DRM_DEBUG_KMS("block id 0x%x, rev %d, len %d\n",
-			      block->tag, block->rev, block->num_bytes);
-
-		switch (block->tag) {
-		case DATA_BLOCK_TILED_DISPLAY:
-			drm_parse_tiled_block(connector, block);
-			break;
-		default:
-			DRM_DEBUG_KMS("found DisplayID tag 0x%x, unhandled\n", block->tag);
-			break;
-		}
-	}
-}
-
 void drm_update_tile_info(struct drm_connector *connector,
 			  const struct edid *edid)
 {
-	const void *displayid = NULL;
-	int ext_index = 0;
-	int length, idx;
+	const struct displayid_block *block;
+	struct displayid_iter iter;
 
 	connector->has_tile = false;
-	for (;;) {
-		displayid = drm_find_displayid_extension(edid, &length, &idx,
-							 &ext_index);
-		if (!displayid)
-			break;
 
-		drm_displayid_parse_tiled(connector, displayid, length, idx);
+	displayid_iter_edid_begin(edid, &iter);
+	displayid_iter_for_each(block, &iter) {
+		if (block->tag == DATA_BLOCK_TILED_DISPLAY)
+			drm_parse_tiled_block(connector, block);
 	}
+	displayid_iter_end(&iter);
 
 	if (!connector->has_tile && connector->tile_group) {
 		drm_mode_put_tile_group(connector->dev, connector->tile_group);
diff --git a/include/drm/drm_displayid.h b/include/drm/drm_displayid.h
index 27e06c98db17..10ee863f1734 100644
--- a/include/drm/drm_displayid.h
+++ b/include/drm/drm_displayid.h
@@ -96,18 +96,6 @@ struct displayid_detailed_timing_block {
 	struct displayid_detailed_timings_1 timings[];
 };
 
-#define for_each_displayid_db(displayid, block, idx, length) \
-	for ((block) = (const struct displayid_block *)&(displayid)[idx]; \
-	     (idx) + sizeof(struct displayid_block) <= (length) && \
-	     (idx) + sizeof(struct displayid_block) + (block)->num_bytes <= (length) && \
-	     (block)->num_bytes > 0; \
-	     (idx) += sizeof(struct displayid_block) + (block)->num_bytes, \
-	     (block) = (const struct displayid_block *)&(displayid)[idx])
-
-const u8 *drm_find_displayid_extension(const struct edid *edid,
-				       int *length, int *idx,
-				       int *ext_index);
-
 /* DisplayID iteration */
 struct displayid_iter {
 	const struct edid *edid;