[PATCH] drm/edid/firmware: drop drm_kms_helper.edid_firmware backward compat

[Jani Nikula]

Since the edid_firmware module parameter was moved from
drm_kms_helper.ko to drm.ko in v4.15, we've had a backwards
compatibility helper in place, with a DRM_NOTE() suggesting to migrate
to drm.edid_firmware. This was added in commit ac6c35a4d8c7 ("drm: add
backwards compatibility support for drm_kms_helper.edid_firmware").

More than five years and 30+ kernel releases later, see if we could drop
the backward compatibility. Leave some warnings in place for a while
longer.

Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/drm_edid_load.c         | 16 ----------------
 drivers/gpu/drm/drm_kms_helper_common.c | 11 ++++++-----
 include/drm/drm_edid.h                  |  5 -----
 3 files changed, 6 insertions(+), 26 deletions(-)

diff --git a/drivers/gpu/drm/drm_edid_load.c b/drivers/gpu/drm/drm_edid_load.c
index 5d9ef267ebb3..60fcb80bce61 100644
--- a/drivers/gpu/drm/drm_edid_load.c
+++ b/drivers/gpu/drm/drm_edid_load.c
@@ -23,22 +23,6 @@ module_param_string(edid_firmware, edid_firmware, sizeof(edid_firmware), 0644);
 MODULE_PARM_DESC(edid_firmware, "Do not probe monitor, use specified EDID blob "
 	"from built-in data or /lib/firmware instead. ");
 
-/* Use only for backward compatibility with drm_kms_helper.edid_firmware */
-int __drm_set_edid_firmware_path(const char *path)
-{
-	scnprintf(edid_firmware, sizeof(edid_firmware), "%s", path);
-
-	return 0;
-}
-EXPORT_SYMBOL(__drm_set_edid_firmware_path);
-
-/* Use only for backward compatibility with drm_kms_helper.edid_firmware */
-int __drm_get_edid_firmware_path(char *buf, size_t bufsize)
-{
-	return scnprintf(buf, bufsize, "%s", edid_firmware);
-}
-EXPORT_SYMBOL(__drm_get_edid_firmware_path);
-
 #define GENERIC_EDIDS 6
 static const char * const generic_edid_name[GENERIC_EDIDS] = {
 	"edid/800x600.bin",
diff --git a/drivers/gpu/drm/drm_kms_helper_common.c b/drivers/gpu/drm/drm_kms_helper_common.c
index 0bf0fc1abf54..924e0f7bd5b7 100644
--- a/drivers/gpu/drm/drm_kms_helper_common.c
+++ b/drivers/gpu/drm/drm_kms_helper_common.c
@@ -38,17 +38,18 @@ MODULE_LICENSE("GPL and additional rights");
 
 #if IS_ENABLED(CONFIG_DRM_LOAD_EDID_FIRMWARE)
 
-/* Backward compatibility for drm_kms_helper.edid_firmware */
 static int edid_firmware_set(const char *val, const struct kernel_param *kp)
 {
-	DRM_NOTE("drm_kms_helper.edid_firmware is deprecated, please use drm.edid_firmware instead.\n");
+	pr_warn("drm_kms_helper.edid_firmware has been removed, please use drm.edid_firmware instead.\n");
 
-	return __drm_set_edid_firmware_path(val);
+	return -ENOENT;
 }
 
 static int edid_firmware_get(char *buffer, const struct kernel_param *kp)
 {
-	return __drm_get_edid_firmware_path(buffer, PAGE_SIZE);
+	pr_warn("drm_kms_helper.edid_firmware has been removed, please use drm.edid_firmware instead.\n");
+
+	return -ENOENT;
 }
 
 static const struct kernel_param_ops edid_firmware_ops = {
@@ -59,6 +60,6 @@ static const struct kernel_param_ops edid_firmware_ops = {
 module_param_cb(edid_firmware, &edid_firmware_ops, NULL, 0644);
 __MODULE_PARM_TYPE(edid_firmware, "charp");
 MODULE_PARM_DESC(edid_firmware,
-		 "DEPRECATED. Use drm.edid_firmware module parameter instead.");
+		 "REMOVED. Use drm.edid_firmware module parameter instead.");
 
 #endif
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 882d2638708e..00f0a778ab62 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -387,11 +387,6 @@ int drm_edid_to_speaker_allocation(const struct edid *edid, u8 **sadb);
 int drm_av_sync_delay(struct drm_connector *connector,
 		      const struct drm_display_mode *mode);
 
-#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
-int __drm_set_edid_firmware_path(const char *path);
-int __drm_get_edid_firmware_path(char *buf, size_t bufsize);
-#endif
-
 bool drm_edid_are_equal(const struct edid *edid1, const struct edid *edid2);
 
 int
-- 
2.39.2