drm/edid/firmware: drop drm_kms_helper.edid_firmware backward compat

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, drop the backward
compatibility.

v2: Drop the warnings too

Acked-by: Daniel Vetter <[e-mail]>
Signed-off-by: Jani Nikula <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/drm_edid_load.c

···
 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",

drivers/gpu/drm/drm_kms_helper_common.c

···
 
 #include <linux/module.h>
 
-#include <drm/drm_edid.h>
-#include <drm/drm_print.h>
-
-#include "drm_crtc_helper_internal.h"
-
 MODULE_AUTHOR("David Airlie, Jesse Barnes");
 MODULE_DESCRIPTION("DRM KMS helper");
 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");
-
-	return __drm_set_edid_firmware_path(val);
-}
-
-static int edid_firmware_get(char *buffer, const struct kernel_param *kp)
-{
-	return __drm_get_edid_firmware_path(buffer, PAGE_SIZE);
-}
-
-static const struct kernel_param_ops edid_firmware_ops = {
-	.set = edid_firmware_set,
-	.get = edid_firmware_get,
-};
-
-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.");
-
-#endif

include/drm/drm_edid.h

···
 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