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authorAntonino A. Daplas <adaplas@gmail.com>2005-09-09 13:04:34 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-09 13:57:59 -0700
commit5e518d7672dea4cd7c60871e40d0490c52f01d13 (patch)
treea97dc33b2ce9a0553fb6b9b3206ee7674ae4d06a /drivers/video/fbmon.c
parent53eed4ec8bcd8701b9135859ec46b10a0d88ba25 (diff)
[PATCH] fbdev: Resurrect hooks to get EDID from firmware
For the i386, code is already present in video.S that gets the EDID from the video BIOS. Make this visible so drivers can also use this data as fallback when i2c does not work. To ensure that the EDID block is returned for the primary graphics adapter only, by check if the IORESOURCE_ROM_SHADOW flag is set. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/video/fbmon.c')
-rw-r--r--drivers/video/fbmon.c35
1 files changed, 34 insertions, 1 deletions
diff --git a/drivers/video/fbmon.c b/drivers/video/fbmon.c
index c2718bb9494..791bec3d672 100644
--- a/drivers/video/fbmon.c
+++ b/drivers/video/fbmon.c
@@ -29,6 +29,7 @@
#include <linux/tty.h>
#include <linux/fb.h>
#include <linux/module.h>
+#include <video/edid.h>
#ifdef CONFIG_PPC_OF
#include <linux/pci.h>
#include <asm/prom.h>
@@ -1251,9 +1252,41 @@ int fb_validate_mode(const struct fb_var_screeninfo *var, struct fb_info *info)
-EINVAL : 0;
}
+#if defined(__i386__)
+#include <linux/pci.h>
+
+/*
+ * 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)
+{
+ 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)
+ edid = edid_info.dummy;
+
+ return edid;
+}
+#else
+const unsigned char *fb_firmware_edid(struct device *device)
+{
+ return NULL;
+}
+#endif /* _i386_ */
+
EXPORT_SYMBOL(fb_parse_edid);
EXPORT_SYMBOL(fb_edid_to_monspecs);
-
+EXPORT_SYMBOL(fb_firmware_edid);
EXPORT_SYMBOL(fb_get_mode);
EXPORT_SYMBOL(fb_validate_mode);
EXPORT_SYMBOL(fb_destroy_modedb);