[PATCH 8/9] fbdev: Detect primary display device

From: Antonino A. Daplas
Date: Sun May 27 2007 - 05:52:34 EST

Add function helper, fb_is_display_device(). Given struct fb_info, it will
return a nonzero value if the device is the primary display.

Currently, only the i386 is supported, other platforms only have stubs. For
the i386, the function checks for the IORESOURCE_ROM_SHADOW flag.

Signed-off-by: Antonino Daplas <adaplas@xxxxxxxxx>
---

arch/i386/Makefile | 1 +
arch/i386/video/Makefile | 1 +
arch/i386/video/fbdev.c | 34 ++++++++++++++++++++++++++++++++++
include/asm-alpha/fb.h | 6 ++++++
include/asm-arm/fb.h | 6 ++++++
include/asm-arm26/fb.h | 6 ++++++
include/asm-avr32/fb.h | 6 ++++++
include/asm-blackfin/fb.h | 6 ++++++
include/asm-cris/fb.h | 6 ++++++
include/asm-frv/fb.h | 6 ++++++
include/asm-h8300/fb.h | 6 ++++++
include/asm-i386/fb.h | 3 +++
include/asm-ia64/fb.h | 6 ++++++
include/asm-m32r/fb.h | 6 ++++++
include/asm-m68k/fb.h | 6 ++++++
include/asm-m68knommu/fb.h | 6 ++++++
include/asm-mips/fb.h | 6 ++++++
include/asm-parisc/fb.h | 6 ++++++
include/asm-powerpc/fb.h | 6 ++++++
include/asm-s390/fb.h | 6 ++++++
include/asm-sh/fb.h | 6 ++++++
include/asm-sh64/fb.h | 6 ++++++
include/asm-sparc/fb.h | 6 ++++++
include/asm-sparc64/fb.h | 6 ++++++
include/asm-v850/fb.h | 6 ++++++
include/asm-x86_64/fb.h | 7 ++++++-
include/asm-xtensa/fb.h | 6 ++++++
27 files changed, 177 insertions(+), 1 deletions(-)

diff --git a/arch/i386/Makefile b/arch/i386/Makefile
index 3eb063e..01f0ff0 100644
--- a/arch/i386/Makefile
+++ b/arch/i386/Makefile
@@ -111,6 +111,7 @@ drivers-$(CONFIG_PCI) += arch/i386/pci
# must be linked after kernel/
drivers-$(CONFIG_OPROFILE) += arch/i386/oprofile/
drivers-$(CONFIG_PM) += arch/i386/power/
+drivers-$(CONFIG_FB) += arch/i386/video/

CFLAGS += $(mflags-y)
AFLAGS += $(mflags-y)
diff --git a/arch/i386/video/Makefile b/arch/i386/video/Makefile
new file mode 100644
index 0000000..2c447c9
--- /dev/null
+++ b/arch/i386/video/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_FB) += fbdev.o
diff --git a/arch/i386/video/fbdev.c b/arch/i386/video/fbdev.c
new file mode 100644
index 0000000..7fc712c
--- /dev/null
+++ b/arch/i386/video/fbdev.c
@@ -0,0 +1,34 @@
+/*
+ * arch/i386/video/fbdev.c - i386 Framebuffer
+ *
+ * Copyright (C) 2007 Antonino Daplas <adaplas@xxxxxxxxx>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ *
+ */
+#include <linux/fb.h>
+#include <linux/pci.h>
+
+int fb_is_primary_device(struct fb_info *info)
+{
+ struct device *device;
+ struct pci_dev *pci_dev = NULL;
+ struct resource *res = NULL;
+ int retval = 0;
+
+ device = info->device;
+
+ if (device)
+ pci_dev = to_pci_dev(device);
+
+ if (pci_dev)
+ res = &pci_dev->resource[PCI_ROM_RESOURCE];
+
+ if (res && res->flags & IORESOURCE_ROM_SHADOW)
+ retval = 1;
+
+ return retval;
+}
+EXPORT_SYMBOL(fb_is_primary_device);
diff --git a/include/asm-alpha/fb.h b/include/asm-alpha/fb.h
index ca714a4..f87e4ca 100644
--- a/include/asm-alpha/fb.h
+++ b/include/asm-alpha/fb.h
@@ -1,7 +1,13 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
+#include <linux/device.h>

/* Caching is off in the I/O space quadrant by design. */
#define fb_pgprotect(...) do {} while (0)

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-arm/fb.h b/include/asm-arm/fb.h
index 4bf5b88..43fb2bc 100644
--- a/include/asm-arm/fb.h
+++ b/include/asm-arm/fb.h
@@ -1,6 +1,7 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_

+#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>

@@ -10,4 +11,9 @@ static inline void fb_pgprotect(struct f
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
}

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-arm26/fb.h b/include/asm-arm26/fb.h
index 9f8c88d..f2752d4 100644
--- a/include/asm-arm26/fb.h
+++ b/include/asm-arm26/fb.h
@@ -1,6 +1,12 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
+#include <linux/fb.h>

#define fb_pgprotect(...) do {} while (0)

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-avr32/fb.h b/include/asm-avr32/fb.h
index d22a4a8..b39a0f0 100644
--- a/include/asm-avr32/fb.h
+++ b/include/asm-avr32/fb.h
@@ -1,6 +1,7 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_

+#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>

@@ -12,4 +13,9 @@ static inline void fb_pgprotect(struct f
| (_PAGE_BUFFER | _PAGE_DIRTY));
}

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-blackfin/fb.h b/include/asm-blackfin/fb.h
index 9f8c88d..f2752d4 100644
--- a/include/asm-blackfin/fb.h
+++ b/include/asm-blackfin/fb.h
@@ -1,6 +1,12 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
+#include <linux/fb.h>

#define fb_pgprotect(...) do {} while (0)

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-cris/fb.h b/include/asm-cris/fb.h
index 9f8c88d..f2752d4 100644
--- a/include/asm-cris/fb.h
+++ b/include/asm-cris/fb.h
@@ -1,6 +1,12 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
+#include <linux/fb.h>

#define fb_pgprotect(...) do {} while (0)

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-frv/fb.h b/include/asm-frv/fb.h
index 9f8c88d..f2752d4 100644
--- a/include/asm-frv/fb.h
+++ b/include/asm-frv/fb.h
@@ -1,6 +1,12 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
+#include <linux/fb.h>

#define fb_pgprotect(...) do {} while (0)

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-h8300/fb.h b/include/asm-h8300/fb.h
index 9f8c88d..f2752d4 100644
--- a/include/asm-h8300/fb.h
+++ b/include/asm-h8300/fb.h
@@ -1,6 +1,12 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
+#include <linux/fb.h>

#define fb_pgprotect(...) do {} while (0)

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-i386/fb.h b/include/asm-i386/fb.h
index d30073c..d1c6297 100644
--- a/include/asm-i386/fb.h
+++ b/include/asm-i386/fb.h
@@ -1,9 +1,12 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_

+#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>

+extern int fb_is_primary_device(struct fb_info *info);
+
static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
unsigned long off)
{
diff --git a/include/asm-ia64/fb.h b/include/asm-ia64/fb.h
index c06b45b..9150ebd 100644
--- a/include/asm-ia64/fb.h
+++ b/include/asm-ia64/fb.h
@@ -1,6 +1,7 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_

+#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>

@@ -13,4 +14,9 @@ static inline void fb_pgprotect(struct f
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
}

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-m32r/fb.h b/include/asm-m32r/fb.h
index 4bf5b88..43fb2bc 100644
--- a/include/asm-m32r/fb.h
+++ b/include/asm-m32r/fb.h
@@ -1,6 +1,7 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_

+#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>

@@ -10,4 +11,9 @@ static inline void fb_pgprotect(struct f
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
}

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-m68k/fb.h b/include/asm-m68k/fb.h
index dc12b5a..e51656f 100644
--- a/include/asm-m68k/fb.h
+++ b/include/asm-m68k/fb.h
@@ -1,6 +1,7 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_

+#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>
#include <asm/setup.h>
@@ -24,4 +25,9 @@ static inline void fb_pgprotect(struct f
}
#endif /* CONFIG_SUN3 */

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-m68knommu/fb.h b/include/asm-m68knommu/fb.h
index 9f8c88d..f2752d4 100644
--- a/include/asm-m68knommu/fb.h
+++ b/include/asm-m68knommu/fb.h
@@ -1,6 +1,12 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
+#include <linux/fb.h>

#define fb_pgprotect(...) do {} while (0)

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-mips/fb.h b/include/asm-mips/fb.h
index ac23d96..cc740a9 100644
--- a/include/asm-mips/fb.h
+++ b/include/asm-mips/fb.h
@@ -1,6 +1,7 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_

+#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>

@@ -10,4 +11,9 @@ static inline void fb_pgprotect(struct f
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
}

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-parisc/fb.h b/include/asm-parisc/fb.h
index d5e47ed..be603ee 100644
--- a/include/asm-parisc/fb.h
+++ b/include/asm-parisc/fb.h
@@ -1,6 +1,7 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_

+#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>

@@ -10,4 +11,9 @@ static inline void fb_pgprotect(struct f
pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
}

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-powerpc/fb.h b/include/asm-powerpc/fb.h
index e13d6eb..0f124d0 100644
--- a/include/asm-powerpc/fb.h
+++ b/include/asm-powerpc/fb.h
@@ -1,6 +1,7 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_

+#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>

@@ -12,4 +13,9 @@ static inline void fb_pgprotect(struct f
vma->vm_page_prot);
}

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-s390/fb.h b/include/asm-s390/fb.h
index 9f8c88d..f2752d4 100644
--- a/include/asm-s390/fb.h
+++ b/include/asm-s390/fb.h
@@ -1,6 +1,12 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
+#include <linux/fb.h>

#define fb_pgprotect(...) do {} while (0)

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-sh/fb.h b/include/asm-sh/fb.h
index 4bf5b88..43fb2bc 100644
--- a/include/asm-sh/fb.h
+++ b/include/asm-sh/fb.h
@@ -1,6 +1,7 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_

+#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>

@@ -10,4 +11,9 @@ static inline void fb_pgprotect(struct f
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
}

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-sh64/fb.h b/include/asm-sh64/fb.h
index 4bf5b88..43fb2bc 100644
--- a/include/asm-sh64/fb.h
+++ b/include/asm-sh64/fb.h
@@ -1,6 +1,7 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_

+#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>

@@ -10,4 +11,9 @@ static inline void fb_pgprotect(struct f
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
}

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-sparc/fb.h b/include/asm-sparc/fb.h
index 9f8c88d..f2752d4 100644
--- a/include/asm-sparc/fb.h
+++ b/include/asm-sparc/fb.h
@@ -1,6 +1,12 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
+#include <linux/fb.h>

#define fb_pgprotect(...) do {} while (0)

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-sparc64/fb.h b/include/asm-sparc64/fb.h
index 8703c70..175f0fb 100644
--- a/include/asm-sparc64/fb.h
+++ b/include/asm-sparc64/fb.h
@@ -1,5 +1,6 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
+#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>

@@ -9,4 +10,9 @@ static inline void fb_pgprotect(struct f
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
}

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-v850/fb.h b/include/asm-v850/fb.h
index 9f8c88d..f2752d4 100644
--- a/include/asm-v850/fb.h
+++ b/include/asm-v850/fb.h
@@ -1,6 +1,12 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
+#include <linux/fb.h>

#define fb_pgprotect(...) do {} while (0)

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-x86_64/fb.h b/include/asm-x86_64/fb.h
index d30073c..2e66064 100644
--- a/include/asm-x86_64/fb.h
+++ b/include/asm-x86_64/fb.h
@@ -1,6 +1,6 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
-
+#include <linux/fb.h>
#include <linux/fs.h>
#include <asm/page.h>

@@ -11,4 +11,9 @@ static inline void fb_pgprotect(struct f
pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
}

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */
diff --git a/include/asm-xtensa/fb.h b/include/asm-xtensa/fb.h
index 9f8c88d..f2752d4 100644
--- a/include/asm-xtensa/fb.h
+++ b/include/asm-xtensa/fb.h
@@ -1,6 +1,12 @@
#ifndef _ASM_FB_H_
#define _ASM_FB_H_
+#include <linux/fb.h>

#define fb_pgprotect(...) do {} while (0)

+static inline int fb_is_primary_device(struct fb_screeninfo *info)
+{
+ return 0;
+}
+
#endif /* _ASM_FB_H_ */


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