x86/efi/efifb: Move DMI based quirks handling out of generic code

The efifb quirks handling based on DMI identification of the platform is
specific to x86, so move it to x86 arch code.
Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: NMatt Fleming <matt@codeblueprint.co.uk>
Acked-by: NDavid Herrmann <dh.herrmann@gmail.com>
Acked-by: NPeter Jones <pjones@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/1461614832-17633-19-git-send-email-matt@codeblueprint.co.ukSigned-off-by: NIngo Molnar <mingo@kernel.org>

arch/x86/include/asm/efi.h

@@ -180,6 +180,8 @@ static inline bool efi_runtime_supported(void)
 extern struct console early_efi_console;
 extern void parse_efi_setup(u64 phys_addr, u32 data_len);
 
+extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
+
 #ifdef CONFIG_EFI_MIXED
 extern void efi_thunk_runtime_setup(void);
 extern efi_status_t efi_thunk_set_virtual_address_map(

arch/x86/kernel/sysfb_efi.c

@@ -68,6 +68,21 @@ struct efifb_dmi_info efifb_dmi_list[] = {
 	[M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE }
 };
 
+void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
+{
+	int i;
+
+	for (i = 0; i < M_UNKNOWN; i++) {
+		if (efifb_dmi_list[i].base != 0 &&
+		    !strcmp(opt, efifb_dmi_list[i].optname)) {
+			si->lfb_base = efifb_dmi_list[i].base;
+			si->lfb_linelength = efifb_dmi_list[i].stride;
+			si->lfb_width = efifb_dmi_list[i].width;
+			si->lfb_height = efifb_dmi_list[i].height;
+		}
+	}
+}
+
 #define choose_value(dmivalue, fwvalue, field, flags) ({	\
 		typeof(fwvalue) _ret_ = fwvalue;		\
 		if ((flags) & (field))				\

drivers/video/fbdev/efifb.c

@@ -8,6 +8,7 @@
 
 #include <linux/module.h>
 #include <linux/kernel.h>
+#include <linux/efi.h>
 #include <linux/errno.h>
 #include <linux/fb.h>
 #include <linux/platform_device.h>
@@ -15,7 +16,7 @@
 #include <linux/dmi.h>
 #include <linux/pci.h>
 #include <video/vga.h>
-#include <asm/sysfb.h>
+#include <asm/efi.h>
 
 static bool request_mem_succeeded = false;
 
@@ -85,21 +86,13 @@ static struct fb_ops efifb_ops = {
 static int efifb_setup(char *options)
 {
 	char *this_opt;
-	int i;
 
 	if (options && *options) {
 		while ((this_opt = strsep(&options, ",")) != NULL) {
 			if (!*this_opt) continue;
 
-			for (i = 0; i < M_UNKNOWN; i++) {
-				if (efifb_dmi_list[i].base != 0 &&
-				    !strcmp(this_opt, efifb_dmi_list[i].optname)) {
-					screen_info.lfb_base = efifb_dmi_list[i].base;
-					screen_info.lfb_linelength = efifb_dmi_list[i].stride;
-					screen_info.lfb_width = efifb_dmi_list[i].width;
-					screen_info.lfb_height = efifb_dmi_list[i].height;
-				}
-			}
+			efifb_setup_from_dmi(&screen_info, this_opt);
+
 			if (!strncmp(this_opt, "base:", 5))
 				screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0);
 			else if (!strncmp(this_opt, "stride:", 7))