video: Make global edid_info depend on CONFIG_FIRMWARE_EDID

Protect global edid_info behind CONFIG_FIRMWARE_EDID and remove
the config tests for CONFIG_X86. Makes edid_info available iff
its option has been enabled.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Helge Deller <deller@gmx.de>
Link: https://lore.kernel.org/r/20250602075537.137759-3-tzimmermann@suse.de

Author: tdz

arch/x86/kernel/setup.c

@@ -213,8 +213,10 @@ arch_initcall(init_x86_sysctl);
  */
 struct screen_info screen_info;
 EXPORT_SYMBOL(screen_info);
+#if defined(CONFIG_FIRMWARE_EDID)
 struct edid_info edid_info;
 EXPORT_SYMBOL_GPL(edid_info);
+#endif
 
 extern int root_mountflags;
 
@@ -525,7 +527,9 @@ static void __init parse_boot_params(void)
 {
 	ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
 	screen_info = boot_params.screen_info;
+#if defined(CONFIG_FIRMWARE_EDID)
 	edid_info = boot_params.edid_info;
+#endif
 #ifdef CONFIG_X86_32
 	apm_info.bios = boot_params.apm_bios_info;
 	ist_info = boot_params.ist_info;

drivers/gpu/drm/sysfb/efidrm.c

@@ -202,7 +202,7 @@ static struct efidrm_device *efidrm_device_create(struct drm_driver *drv,
 	drm_dbg(dev, "framebuffer format=%p4cc, size=%dx%d, stride=%d bytes\n",
 		&format->format, width, height, stride);
 
-#ifdef CONFIG_X86
+#if defined(CONFIG_FIRMWARE_EDID)
 	if (drm_edid_header_is_valid(edid_info.dummy) == 8)
 		sysfb->edid = edid_info.dummy;
 #endif

drivers/gpu/drm/sysfb/vesadrm.c

@@ -344,7 +344,7 @@ static struct vesadrm_device *vesadrm_device_create(struct drm_driver *drv,
 #endif
 	}
 
-#ifdef CONFIG_X86
+#if defined(CONFIG_FIRMWARE_EDID)
 	if (drm_edid_header_is_valid(edid_info.dummy) == 8)
 		sysfb->edid = edid_info.dummy;
 #endif

include/video/edid.h

@@ -4,7 +4,8 @@
 
 #include <uapi/video/edid.h>
 
-#ifdef CONFIG_X86
+#if defined(CONFIG_FIRMWARE_EDID)
 extern struct edid_info edid_info;
 #endif
+
 #endif /* __linux_video_edid_h__ */