[04/25] drm/edid: start propagating drm_edid to lower levels

Commit Message

Jani Nikula May 6, 2022, 10:10 a.m. UTC

We'll need to propagate drm_edid everywhere. This is a clunky start, but
a start nonetheless. We'll eventually convert all of the EDID parsing to
struct drm_edid.

Initially, we'll just create the struct drm_edid in stack. This will be
the compat layer for legacy struct edid code. In the future, we'll have
EDID read return drm_edid objects.

Signed-off-by: Jani Nikula <[e-mail]>
---
 drivers/gpu/drm/drm_edid.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

Patch

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 480fd9fbe412..946296632b2e 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -5814,17 +5814,20 @@  static int add_displayid_detailed_modes(struct drm_connector *connector,
 }
 
 static int drm_edid_connector_update(struct drm_connector *connector,
-				     const struct edid *edid)
+				     const struct drm_edid *drm_edid)
 {
+	const struct edid *edid;
 	int num_modes = 0;
 	u32 quirks;
 
-	if (edid == NULL) {
+	if (drm_edid == NULL) {
 		drm_reset_display_info(connector);
 		clear_eld(connector);
 		return 0;
 	}
 
+	edid = drm_edid->edid;
+
 	/*
 	 * CEA-861-F adds ycbcr capability map block, for HDMI 2.0 sinks.
 	 * To avoid multiple parsing of same block, lets parse that map
@@ -5890,13 +5893,20 @@  static int drm_edid_connector_update(struct drm_connector *connector,
  */
 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
 {
+	struct drm_edid drm_edid = {};
+
 	if (edid && !drm_edid_is_valid(edid)) {
 		drm_warn(connector->dev, "%s: EDID invalid.\n",
 			 connector->name);
 		edid = NULL;
 	}
 
-	return drm_edid_connector_update(connector, edid);
+	if (edid) {
+		drm_edid.edid = edid;
+		drm_edid.size = edid_size(edid);
+	}
+
+	return drm_edid_connector_update(connector, edid ? &drm_edid : NULL);
 }
 EXPORT_SYMBOL(drm_add_edid_modes);