From c1ec4ea8c9e56a2e64c28a7982fdec41ad02c8f3 Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Mon, 9 May 2022 15:03:17 +0300
Subject: drm/edid: add drm_edid helper for drm_edid_to_speaker_allocation()
Git-commit: 027034511c6a1e3ea96122f7626b89b6d339ed49
Patch-mainline: v6.0-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849
We'll need to propagate drm_edid everywhere.'
v2: Handle NULL EDID pointer (Ville, CI)
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/770d095c93274969c4b86480e07044e16a7b5760.1652097712.git.jani.nikula@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/drm_edid.c | 37 +++++++++++++++++++++++--------------
1 file changed, 23 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 1e4228aa10fd..4e7811c2eb07 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -5025,25 +5025,14 @@ int drm_edid_to_sad(const struct edid *edid, struct cea_sad **sads)
}
EXPORT_SYMBOL(drm_edid_to_sad);
-/**
- * drm_edid_to_speaker_allocation - extracts Speaker Allocation Data Blocks from EDID
- * @edid: EDID to parse
- * @sadb: pointer to the speaker block
- *
- * Looks for CEA EDID block and extracts the Speaker Allocation Data Block from it.
- *
- * Note: The returned pointer needs to be freed using kfree().
- *
- * Return: The number of found Speaker Allocation Blocks or negative number on
- * error.
- */
-int drm_edid_to_speaker_allocation(const struct edid *edid, u8 **sadb)
+static int _drm_edid_to_speaker_allocation(const struct drm_edid *drm_edid,
+ u8 **sadb)
{
const struct cea_db *db;
struct cea_db_iter iter;
int count = 0;
- cea_db_iter_edid_begin(edid, &iter);
+ cea_db_iter_edid_begin(drm_edid ? drm_edid->edid : NULL, &iter);
cea_db_iter_for_each(db, &iter) {
if (cea_db_tag(db) == CTA_DB_SPEAKER &&
cea_db_payload_len(db) == 3) {
@@ -5061,6 +5050,26 @@ int drm_edid_to_speaker_allocation(const struct edid *edid, u8 **sadb)
return count;
}
+
+/**
+ * drm_edid_to_speaker_allocation - extracts Speaker Allocation Data Blocks from EDID
+ * @edid: EDID to parse
+ * @sadb: pointer to the speaker block
+ *
+ * Looks for CEA EDID block and extracts the Speaker Allocation Data Block from it.
+ *
+ * Note: The returned pointer needs to be freed using kfree().
+ *
+ * Return: The number of found Speaker Allocation Blocks or negative number on
+ * error.
+ */
+int drm_edid_to_speaker_allocation(const struct edid *edid, u8 **sadb)
+{
+ struct drm_edid drm_edid;
+
+ return _drm_edid_to_speaker_allocation(drm_edid_legacy_init(&drm_edid, edid),
+ sadb);
+}
EXPORT_SYMBOL(drm_edid_to_speaker_allocation);
/**
--
2.38.1