[PATCH 1/2] efi: sysfb_efi: Fix DMI quirks not working for simpledrm

[Hans de Goede]

Commit 8633ef82f101 ("drivers/firmware: consolidate EFI framebuffer setup
for all arches") moved the sysfb_apply_efi_quirks() call in sysfb_init()
from before the [sysfb_]parse_mode() call to after it.
But sysfb_apply_efi_quirks() modifies the global screen_info struct which
[sysfb_]parse_mode() parses, so doing it later is too late.

This has broken all DMI based quirks for correcting wrong firmware efifb
settings when simpledrm is used.

To fix this move the sysfb_apply_efi_quirks() call back to its old place
and split the new setup of the efifb_fwnode (which requires
the platform_device) into its own function and call that at
the place of the moved sysfb_apply_efi_quirks(pd) calls.

Fixes: 8633ef82f101 ("drivers/firmware: consolidate EFI framebuffer setup for all arches")
Cc: stable at vger.kernel.org
Cc: Javier Martinez Canillas <javierm at redhat.com>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 drivers/firmware/efi/sysfb_efi.c  | 5 ++++-
 drivers/firmware/sysfb.c          | 4 +++-
 drivers/firmware/sysfb_simplefb.c | 2 +-
 include/linux/sysfb.h             | 9 +++++++--
 4 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/firmware/efi/sysfb_efi.c b/drivers/firmware/efi/sysfb_efi.c
index f06fdacc9bc8..e76d6803bdd0 100644
--- a/drivers/firmware/efi/sysfb_efi.c
+++ b/drivers/firmware/efi/sysfb_efi.c
@@ -341,7 +341,7 @@ static const struct fwnode_operations efifb_fwnode_ops = {
 #ifdef CONFIG_EFI
 static struct fwnode_handle efifb_fwnode;
 
-__init void sysfb_apply_efi_quirks(struct platform_device *pd)
+__init void sysfb_apply_efi_quirks(void)
 {
 	if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
 	    !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
@@ -355,7 +355,10 @@ __init void sysfb_apply_efi_quirks(struct platform_device *pd)
 		screen_info.lfb_height = temp;
 		screen_info.lfb_linelength = 4 * screen_info.lfb_width;
 	}
+}
 
+__init void sysfb_set_efifb_fwnode(struct platform_device *pd)
+{
 	if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && IS_ENABLED(CONFIG_PCI)) {
 		fwnode_init(&efifb_fwnode, &efifb_fwnode_ops);
 		pd->dev.fwnode = &efifb_fwnode;
diff --git a/drivers/firmware/sysfb.c b/drivers/firmware/sysfb.c
index 3fd3563d962b..3c197db42c9d 100644
--- a/drivers/firmware/sysfb.c
+++ b/drivers/firmware/sysfb.c
@@ -81,6 +81,8 @@ static __init int sysfb_init(void)
 	if (disabled)
 		goto unlock_mutex;
 
+	sysfb_apply_efi_quirks();
+
 	/* try to create a simple-framebuffer device */
 	compatible = sysfb_parse_mode(si, &mode);
 	if (compatible) {
@@ -107,7 +109,7 @@ static __init int sysfb_init(void)
 		goto unlock_mutex;
 	}
 
-	sysfb_apply_efi_quirks(pd);
+	sysfb_set_efifb_fwnode(pd);
 
 	ret = platform_device_add_data(pd, si, sizeof(*si));
 	if (ret)
diff --git a/drivers/firmware/sysfb_simplefb.c b/drivers/firmware/sysfb_simplefb.c
index ce9c007ed66f..82c64cb9f531 100644
--- a/drivers/firmware/sysfb_simplefb.c
+++ b/drivers/firmware/sysfb_simplefb.c
@@ -141,7 +141,7 @@ __init struct platform_device *sysfb_create_simplefb(const struct screen_info *s
 	if (!pd)
 		return ERR_PTR(-ENOMEM);
 
-	sysfb_apply_efi_quirks(pd);
+	sysfb_set_efifb_fwnode(pd);
 
 	ret = platform_device_add_resources(pd, &res, 1);
 	if (ret)
diff --git a/include/linux/sysfb.h b/include/linux/sysfb.h
index 8ba8b5be5567..c1ef5fc60a3c 100644
--- a/include/linux/sysfb.h
+++ b/include/linux/sysfb.h
@@ -70,11 +70,16 @@ static inline void sysfb_disable(void)
 #ifdef CONFIG_EFI
 
 extern struct efifb_dmi_info efifb_dmi_list[];
-void sysfb_apply_efi_quirks(struct platform_device *pd);
+void sysfb_apply_efi_quirks(void);
+void sysfb_set_efifb_fwnode(struct platform_device *pd);
 
 #else /* CONFIG_EFI */
 
-static inline void sysfb_apply_efi_quirks(struct platform_device *pd)
+static inline void sysfb_apply_efi_quirks(void)
+{
+}
+
+static inline void sysfb_set_efifb_fwnode(struct platform_device *pd)
 {
 }
 
-- 
2.39.1