diff mbox series

[10/12] fbdev/core: Use fb_is_primary_device() in fb_firmware_edid()

Message ID 20230629121952.10559-11-tzimmermann@suse.de (mailing list archive)
State Handled Elsewhere
Headers show
Series arch,fbdev: Move screen_info into arch/ | expand

Checks

Context Check Description
conchuod/tree_selection fail Failed to apply to next/pending-fixes, riscv/for-next or riscv/master

Commit Message

Thomas Zimmermann June 29, 2023, 11:45 a.m. UTC 
Detect the primary VGA device with fb_is_primary_device() in the
implementation of fb_firmware_edid(). Remove the existing code.

Adapt the function to receive an instance of struct fb_info and
update all callers.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Helge Deller <deller@gmx.de>
Cc: Antonino Daplas <adaplas@gmail.com>
Cc: Maik Broemme <mbroemme@libmpq.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
---
 drivers/video/fbdev/core/fbmon.c          | 25 +++++++----------------
 drivers/video/fbdev/i810/i810-i2c.c       |  2 +-
 drivers/video/fbdev/intelfb/intelfbdrv.c  |  2 +-
 drivers/video/fbdev/nvidia/nv_i2c.c       |  2 +-
 drivers/video/fbdev/savage/savagefb-i2c.c |  2 +-
 include/linux/fb.h                        |  2 +-
 6 files changed, 12 insertions(+), 23 deletions(-)

Comments

Javier Martinez Canillas July 5, 2023, 8:02 a.m. UTC | #1 
Thomas Zimmermann <tzimmermann@suse.de> writes:

> Detect the primary VGA device with fb_is_primary_device() in the
> implementation of fb_firmware_edid(). Remove the existing code.
>

An explanation about why this is possible would be useful here.

> Adapt the function to receive an instance of struct fb_info and
> update all callers.
>

[...]

> -const unsigned char *fb_firmware_edid(struct device *device)
> +const unsigned char *fb_firmware_edid(struct fb_info *info)
>  {
> -	struct pci_dev *dev = NULL;
> -	struct resource *res = NULL;
>  	unsigned char *edid = NULL;
>  
> -	if (device)
> -		dev = to_pci_dev(device);
> -
> -	if (dev)
> -		res = &dev->resource[PCI_ROM_RESOURCE];
> -
> -	if (res && res->flags & IORESOURCE_ROM_SHADOW)

This open codes what used to be the fb_is_primary_device() logic before
commit 5ca1479cd35d ("fbdev: Simplify fb_is_primary_device for x86").
But now after that commit there is functional change since the ROM
shadowing check would be dropped.

I believe that's OK and Sima explains in their commit message that
vga_default_device() should be enough and the check is redundant.

Still, I think that this change should be documented in your commit
message. 

With that change,

Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
diff mbox series

Patch

diff --git a/drivers/video/fbdev/core/fbmon.c b/drivers/video/fbdev/core/fbmon.c
index 79e5bfbdd34c2..35be4431f649a 100644
--- a/drivers/video/fbdev/core/fbmon.c
+++ b/drivers/video/fbdev/core/fbmon.c
@@ -28,7 +28,6 @@ 
  */
 #include <linux/fb.h>
 #include <linux/module.h>
-#include <linux/pci.h>
 #include <linux/slab.h>
 #include <video/edid.h>
 #include <video/of_videomode.h>
@@ -1482,31 +1481,21 @@  int fb_validate_mode(const struct fb_var_screeninfo *var, struct fb_info *info)
 }
 
 #if defined(CONFIG_FIRMWARE_EDID) && defined(CONFIG_X86)
-
-/*
- * We need to ensure that the EDID block is only returned for
- * the primary graphics adapter.
- */
-
-const unsigned char *fb_firmware_edid(struct device *device)
+const unsigned char *fb_firmware_edid(struct fb_info *info)
 {
-	struct pci_dev *dev = NULL;
-	struct resource *res = NULL;
 	unsigned char *edid = NULL;
 
-	if (device)
-		dev = to_pci_dev(device);
-
-	if (dev)
-		res = &dev->resource[PCI_ROM_RESOURCE];
-
-	if (res && res->flags & IORESOURCE_ROM_SHADOW)
+	/*
+	 * We need to ensure that the EDID block is only
+	 * returned for the primary graphics adapter.
+	 */
+	if (fb_is_primary_device(info))
 		edid = edid_info.dummy;
 
 	return edid;
 }
 #else
-const unsigned char *fb_firmware_edid(struct device *device)
+const unsigned char *fb_firmware_edid(struct fb_info *info)
 {
 	return NULL;
 }
diff --git a/drivers/video/fbdev/i810/i810-i2c.c b/drivers/video/fbdev/i810/i810-i2c.c
index 7db17d0d8a8cf..b605e96620c1f 100644
--- a/drivers/video/fbdev/i810/i810-i2c.c
+++ b/drivers/video/fbdev/i810/i810-i2c.c
@@ -161,7 +161,7 @@  int i810_probe_i2c_connector(struct fb_info *info, u8 **out_edid, int conn)
 	if (conn < par->ddc_num) {
 		edid = fb_ddc_read(&par->chan[conn].adapter);
 	} else {
-		const u8 *e = fb_firmware_edid(info->device);
+		const u8 *e = fb_firmware_edid(info);
 
 		if (e != NULL) {
 			DPRINTK("i810-i2c: Getting EDID from BIOS\n");
diff --git a/drivers/video/fbdev/intelfb/intelfbdrv.c b/drivers/video/fbdev/intelfb/intelfbdrv.c
index a81095b2b1ea5..4633a75e3a613 100644
--- a/drivers/video/fbdev/intelfb/intelfbdrv.c
+++ b/drivers/video/fbdev/intelfb/intelfbdrv.c
@@ -1024,7 +1024,7 @@  static int intelfb_init_var(struct intelfb_info *dinfo)
 		       sizeof(struct fb_var_screeninfo));
 		msrc = 5;
 	} else {
-		const u8 *edid_s = fb_firmware_edid(&dinfo->pdev->dev);
+		const u8 *edid_s = fb_firmware_edid(dinfo->info);
 		u8 *edid_d = NULL;
 
 		if (edid_s) {
diff --git a/drivers/video/fbdev/nvidia/nv_i2c.c b/drivers/video/fbdev/nvidia/nv_i2c.c
index 0b48965a6420c..632e7d622ebfa 100644
--- a/drivers/video/fbdev/nvidia/nv_i2c.c
+++ b/drivers/video/fbdev/nvidia/nv_i2c.c
@@ -159,7 +159,7 @@  int nvidia_probe_i2c_connector(struct fb_info *info, int conn, u8 **out_edid)
 
 	if (!edid && conn == 1) {
 		/* try to get from firmware */
-		const u8 *e = fb_firmware_edid(info->device);
+		const u8 *e = fb_firmware_edid(info);
 
 		if (e != NULL)
 			edid = kmemdup(e, EDID_LENGTH, GFP_KERNEL);
diff --git a/drivers/video/fbdev/savage/savagefb-i2c.c b/drivers/video/fbdev/savage/savagefb-i2c.c
index 80fa87e2ae2ff..cf9c376f76526 100644
--- a/drivers/video/fbdev/savage/savagefb-i2c.c
+++ b/drivers/video/fbdev/savage/savagefb-i2c.c
@@ -227,7 +227,7 @@  int savagefb_probe_i2c_connector(struct fb_info *info, u8 **out_edid)
 
 	if (!edid) {
 		/* try to get from firmware */
-		const u8 *e = fb_firmware_edid(info->device);
+		const u8 *e = fb_firmware_edid(info);
 
 		if (e)
 			edid = kmemdup(e, EDID_LENGTH, GFP_KERNEL);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 1d5c13f34b098..5ffd2223326bf 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -761,7 +761,7 @@  extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
 extern int fb_validate_mode(const struct fb_var_screeninfo *var,
 			    struct fb_info *info);
 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
-extern const unsigned char *fb_firmware_edid(struct device *device);
+extern const unsigned char *fb_firmware_edid(struct fb_info *info);
 extern void fb_edid_to_monspecs(unsigned char *edid,
 				struct fb_monspecs *specs);
 extern void fb_destroy_modedb(struct fb_videomode *modedb);